feat: 训练任务支持从最新 checkpoint 继续训练

- 后端: 新增 resume/checkpoints 端点，compute 客户端与适配器支持续训
- 计算节点: llama_factory 适配器断点续训支持及测试
- 前端: fine-tune API 封装与列表页续训/断点展示

.dockerignore

@@ -0,0 +1,11 @@
+.git
+.gitignore
+node_modules
+frontend/node_modules
+frontend/dist
+frontend/.vite
+npm-debug.log*
+docker-compose*.yml
+README.md
+design-qa.md
+docs

.github/workflows/ci.yml

@@ -0,0 +1,35 @@
+name: yg-ft-ci
+
+on:
+  push:
+    branches: [main, master, develop]
+  pull_request:
+
+jobs:
+  frontend:
+    runs-on: ubuntu-latest
+    defaults:
+      run:
+        working-directory: frontend
+    steps:
+      - uses: actions/checkout@v4
+      - uses: actions/setup-node@v4
+        with:
+          node-version: 20
+          cache: npm
+          cache-dependency-path: frontend/package-lock.json
+      - run: npm ci
+      - run: npm run build
+
+  backend:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - uses: actions/setup-python@v5
+        with:
+          python-version: '3.12'
+      - run: python -m pip install -r backend/requirements.txt
+      - run: python -m compileall -q backend/app compute
+      - run: python -m pytest -q backend/tests/test_storage_security.py
+        env:
+          PYTHONPATH: backend

.gitignore

@@ -12,6 +12,8 @@ __pycache__/
 build/
 develop-eggs/
 dist/
+node_modules/
+*.tsbuildinfo
 downloads/
 eggs/
 .eggs/
@@ -37,13 +39,22 @@ MANIFEST
 pip-log.txt
 pip-delete-this-directory.txt
 
+# Runtime data and logs
+runtime/
+backend/runtime/
+backend/storage/
+logs/
+backend/logs/
+*.db
+*.sqlite
+*.sqlite3
+
 # Unit test / coverage reports
 htmlcov/
 .tox/
 .nox/
 .coverage
 .coverage.*
-.cache
 nosetests.xml
 coverage.xml
 *.cover
@@ -130,6 +141,7 @@ celerybeat.pid
 
 # Environments
 .env
+!.env.example
 .venv
 env/
 venv/
@@ -137,6 +149,16 @@ ENV/
 env.bak/
 venv.bak/
 
+# Local backend config (含数据库账号密码等敏感信息，勿提交)
+backend/config.yaml
+
+# Agent / IDE 工具产物，不应进版本库
+.codex-backups/
+.pnpm-store/
+.zcode/
+.claude/
+CLAUDE.md
+
 # Spyder project settings
 .spyderproject
 .spyproject
@@ -174,3 +196,33 @@ cython_debug/
 # PyPI configuration file
 .pypirc
 
+docker/llamafactory-latest.tar.gz
+# Compute data - 保留目录结构和 README，忽略子目录内容（日志、模型、数据集等）
+!docker/compute/data/yg-ft/logs/
+docker/compute/data/yg-ft/datasets/*
+docker/compute/data/yg-ft/models/*
+docker/compute/data/yg-ft/outputs/*
+docker/compute/data/yg-ft/trained_models/*
+docker/compute/data/yg-ft/logs/**
+!docker/compute/data/yg-ft/logs/compute/
+!docker/compute/data/yg-ft/logs/training/
+!docker/compute/data/yg-ft/**/.gitkeep
+!docker/compute/data/yg-ft/**/README.md
+
+# Offline deployment bundle - 离线部署包（镜像、运行时等大文件，不提交）
+docker/offline/
+
+# MinIO object storage data - 对象存储运行时数据，勿提交，保留目录结构
+docker/minio/data/*
+!docker/minio/data/.gitkeep
+
+# nlp-eval-demo - 独立演示项目，不进版本库
+nlp-eval-demo/
+nlp-eval-demo.zip
+
+# 项目本地缓存（HuggingFace / tiktoken 等大文件），保留目录结构与占位文件
+.cache/*
+!.cache/.gitkeep
+!.cache/tiktoken/
+!.cache/huggingface/
+!.cache/**/.gitkeep

README.md

@@ -1,133 +1,59 @@
-# YG_FT
+# YG_FT 模型微调平台
 
-远光微调平台 - 面向大语言模型的微调、评测、推理与对比一体化前端。
+YG_FT 是面向多用户、多租户和多算力节点的模型训练与推理平台，提供数据集、模型、训练、权重合并、推理、评测、算力节点、项目隔离、权限和审计能力。
 
-## 技术栈
+## 架构
 
-| 类别 | 技术 | 版本 |
-|------|------|------|
-| 框架 | Vue 3 | ^3.5.13 |
-| 语言 | TypeScript | ~5.7.2 |
-| 构建工具 | Vite | ^6.0.7 |
-| 路由 | Vue Router | ^4.5.0 |
-| 状态管理 | Pinia | ^2.3.0 |
-| UI 组件库 | Element Plus | ^2.9.1 |
-| HTTP 客户端 | axios | ^1.7.9 |
-| 图表 | ECharts / vue-echarts | ^6.1.0 / ^8.0.1 |
-| Markdown | marked + DOMPurify | ^15.0.5 / ^3.2.3 |
-| 编辑器 | md-editor-v3 | ^5.1.4 |
-| 工具集 | @vueuse/core | ^11.3.0 |
-| 样式 | Sass | ^1.83.0 |
+```text
+浏览器 -> Frontend Nginx:16801 -> Backend API:17861
+                                      |-> PostgreSQL（元数据、权限、审计、任务状态）
+                                      |-> Redis（缓存及任务辅助状态）
+                                      |-> MinIO:19000（模型和数据唯一对象源）
+                                      |-> Compute API:19100
+                                                |-> Compute Agent/GPU/LLaMA-Factory
+                                      `-> File Gateway:19101
+```
 
-**项目版本**：1.0.0
+Backend、MinIO 和 Compute 节点可以部署在不同服务器，不依赖跨服务器 Docker 网络，通过 IP、DNS 或负载均衡地址通信。Compute 节点只保存按需准备的本地缓存，MinIO 是模型、数据集、权重、评测报告和训练产物的唯一数据源。
 
-## 环境要求
+## 目录
 
-- **Node.js** >= 18（推荐 20 LTS）
-- **npm** >= 9
-- 后端服务运行于 `http://localhost:7861`（前端通过代理转发，见下文）
+| 目录 | 作用 |
+| --- | --- |
+| `frontend/` | Vue 3、TypeScript、Element Plus 控制台 |
+| `backend/app/api/v1/` | 平台 REST API |
+| `backend/app/core/` | 配置、认证、权限和日志 |
+| `backend/app/db/` | PostgreSQL 访问和初始化 SQL |
+| `backend/app/modules/` | 系统、资源、审批、数据处理和存储模块 |
+| `backend/app/workers/` | 节点轮询、任务对账和资源同步 |
+| `compute/` | Compute API、Agent、GPU 和训练引擎 |
+| `docker/` | 应用、MinIO、算力服务部署文件 |
+| `docs/` | 架构、权限、部署和测试文档 |
 
-## 快速开始
+## 端口
 
-### 1. 安装依赖
+| 服务 | 主机端口 | 容器端口 |
+| --- | ---: | ---: |
+| Frontend | 16801 | 80 |
+| Backend API | 17861 | 8000 |
+| Redis | 16379 | 6379 |
+| MinIO API/Console | 19000/19001 | 9000/9001 |
+| Compute API/File Gateway | 19100/19101 | 9100 |
+
+## 启动
 
 ```bash
-cd frontend
-npm install
+cd frontend && npm ci && npm run build && cd ..
+docker build -f docker/app/Dockerfile.backend -t yg-ft-backend-api:latest .
+docker build -f docker/app/Dockerfile.frontend -t yg-ft-frontend-runtime:latest .
+docker build -f docker/compute/Dockerfile.compute -t yg-ft-compute-api:latest .
+cd docker/minio && docker compose up -d
+cd ../app && docker compose up -d
+cd ../compute && docker compose up -d
 ```
 
-### 2. 启动开发服务器
+## 权限与性能
 
-```bash
-npm run dev
-```
+系统使用角色权限、资源 ACL、用户/项目/租户归属联合校验；删除为软删除，关键操作写入审计。模型合并前准备 base model 和 adapter，结果归档 MinIO；推理前按选择节点准备缓存。远程 PostgreSQL 延迟会影响全量列表和看板，页面慢时应检查浏览器 Network、Nginx、Backend 日志、连接池和节点可达性。
 
-开发服务器默认运行在 `http://localhost:6801`。
-
-### 3. 构建生产包
-
-```bash
-npm run build      # 类型检查 + 生产构建，产物输出到 dist/
-npm run preview    # 本地预览构建产物
-```
-
-### 4. 类型检查
-
-```bash
-npm run type-check
-```
-
-## 测试
-
-内置基于 Playwright 的 UI 回归脚本，首次运行前需安装浏览器：
-
-```bash
-npx playwright install chromium
-```
-
-执行已注册的回归脚本：
-
-```bash
-npm run test:data-process-wizard   # 数据处理向导
-npm run test:model-manage          # 模型管理
-npm run test:training-log-layout   # 训练日志布局
-npm run test:page-surface          # 页面表层级
-```
-
-其余脚本可直接运行：
-
-```bash
-node scripts/regression-back-navigation.mjs       # 返回导航
-node scripts/regression-fine-tune-create-ui.mjs   # 调优创建 UI
-```
-
-> 回归脚本默认连接 `http://localhost:6801`，需先启动开发服务器。
-
-## 目录结构
-
-```
-YG-FT/
-├── frontend/              # 前端工程（Vue 3 SPA）
-│   ├── src/
-│   │   ├── api/           # axios 封装 + 各业务模块 API
-│   │   ├── components/    # 公共组件
-│   │   ├── composables/   # 组合式函数
-│   │   ├── constants/     # 常量与映射表
-│   │   ├── layouts/       # 主布局
-│   │   ├── mock/          # Mock 数据与适配器
-│   │   ├── plugins/       # 第三方插件注册
-│   │   ├── router/        # 路由配置 + 登录守卫
-│   │   ├── stores/        # Pinia 状态
-│   │   ├── styles/        # 全局样式
-│   │   ├── types/         # TypeScript 类型定义
-│   │   └── views/         # 业务页面
-│   ├── scripts/           # UI 回归测试脚本
-│   ├── public/            # 静态资源
-│   └── vite.config.ts     # Vite 构建与代理配置
-├── docs/                  # 设计文档与视觉走查记录
-└── design-qa.md           # 视觉走查汇总
-```
-
-## 端口与代理
-
-| 服务 | 地址 |
-|------|------|
-| 前端开发服务器 | `http://localhost:6801` |
-| 后端 API | `http://localhost:7861` |
-
-前端统一使用 `/api` 相对路径发请求，由 Vite 开发代理转发到后端 `http://localhost:7861`（配置见 `frontend/vite.config.ts`）。
-
-## 业务模块
-
-| 模块 | 说明 |
-|------|------|
-| 登录 | 用户登录鉴权 |
-| 模型调优 | 微调任务创建与管理 |
-| 模型评测 | 评测任务与评测维度配置 |
-| 模型推理 | 在线推理对话 |
-| 模型对比 | 多模型对话与结果对比 |
-| 模型管理 | 模型 CRUD 与权重合并 |
-| 数据集 | 数据集管理与预览 |
-| 数据处理 | 数据处理任务向导 |
-| 工具 | 辅助工具集 |
-| 系统 | 硬件监控、日志、训练日志 |
+详细部署见 `docker/README.md`，测试见 `测试用例.md`，本次快照见 `docs/20260812/`。

backend/README.md

@@ -0,0 +1,65 @@
+# Backend Service
+
+后端工程使用 FastAPI，定位为模型微调平台的应用平台服务，负责用户中心、多租户、权限隔离、项目、数据集、模型、训练任务、审批、审计和算力平台编排。
+
+## 目录结构
+
+```text
+backend/
+  app/
+    main.py                  # FastAPI 应用入口
+    api/v1/                  # 对前端暴露的 接口路由
+    core/                    # 配置、日志、中间件、权限等基础能力
+    db/                      # 数据库连接、迁移集成、事务工具
+    modules/                 # 业务模块
+      auth/
+      tenant/
+      project/
+      model/
+      dataset/
+      data_process/
+      fine_tune/
+      eval/
+      inference/
+      approval/
+      audit/
+      compute_gateway/
+      file_gateway/
+      engine_registry/
+      retention/
+      system/
+    schemas/                 # Pydantic 入参/出参模型
+    services/                # 跨模块应用服务
+    workers/                 # 后台任务入口
+  requirements.txt           # 后端第三方依赖
+  logs/                      # 本地开发日志目录，生产环境建议挂载到独立日志盘
+```
+
+## 本地启动
+
+```bash
+cd backend
+python -m venv .venv
+.venv\Scripts\activate
+pip install -r requirements.txt
+uvicorn app.main:app --reload
+```
+
+健康检查：
+
+```text
+GET /modelTF/health
+```
+
+## 日志
+
+日志模块位于 `app/core/logging.py`，使用说明见 `../docs/backend-logging.md`。
+
+默认日志文件：
+
+```text
+logs/backend-YYYY-MM-DD.log
+logs/error-YYYY-MM-DD.log
+```
+
+文件日志为 JSON Lines 格式，单个文件不超过 20MB，只保存最近 10 天，错误日志按 `ERROR` 级别独立拆分，便于 ELK/日志平台采集。

backend/_check_sessions.py

@@ -0,0 +1,10 @@
+from app.db.platform_store import get_platform_store
+
+store = get_platform_store()
+with store.connect() as conn:
+    rows = conn.execute(
+        "SELECT id, user_id, login_at, logout_at, duration_seconds FROM sessions ORDER BY login_at DESC LIMIT 10"
+    ).fetchall()
+    print(f"sessions count: {len(rows)}")
+    for r in rows:
+        print(f"  user={r['user_id'][:25]}... login={r['login_at']} logout={r['logout_at']} dur={r['duration_seconds']}")

backend/app/__init__.py

@@ -0,0 +1 @@
+"""Application package."""

backend/app/api/__init__.py

@@ -0,0 +1 @@
+"""API package."""

backend/app/api/v1/__init__.py

@@ -0,0 +1 @@
+"""Versioned API package."""

backend/app/api/v1/endpoints/__init__.py

@@ -0,0 +1 @@
+"""API endpoint modules."""

backend/app/api/v1/endpoints/health.py

@@ -0,0 +1,40 @@
+from fastapi import APIRouter
+
+from app.core.logging import get_logger
+from app.db.platform_store import get_platform_store
+from app.core.config import get_settings
+from app.modules.storage.minio_store import ObjectStorageError, get_object_storage
+
+router = APIRouter()
+logger = get_logger(__name__)
+
+
+@router.get("/health")
+async def health_check() -> dict[str, object]:
+    # Health endpoints are called frequently by Docker and the frontend.
+    # Keep failures visible without emitting one INFO line per probe.
+    logger.debug("health check requested")
+    storage_status: dict[str, object] = {"enabled": get_settings().minio_enabled, "status": "disabled"}
+    if get_settings().minio_enabled:
+        try:
+            get_object_storage().ensure_bucket()
+            storage_status = {
+                "enabled": True,
+                "status": "ready",
+                "endpoint": get_settings().minio_endpoint,
+                "bucket": get_settings().minio_bucket,
+            }
+        except (ObjectStorageError, OSError) as exc:
+            logger.warning("MinIO health check failed: %s", exc)
+            storage_status = {
+                "enabled": True,
+                "status": "unavailable",
+                "endpoint": get_settings().minio_endpoint,
+                "error": str(exc),
+            }
+    return {
+        "code": 0,
+        "message": "ok",
+        "data": {**get_platform_store().health_metrics(), "storage": storage_status},
+    }
+

backend/app/api/v1/router.py

@@ -0,0 +1,26 @@
+from fastapi import APIRouter
+
+from app.api.v1.endpoints.data_process import router as data_process_router
+from app.api.v1.endpoints.platform import router as platform_router
+from app.api.v1.endpoints.health import router as health_router
+from app.modules.tenant.router import router as tenant_router
+from app.modules.project.router import router as project_router
+from app.modules.approval.router import router as approval_router
+from app.modules.system.router import router as system_router
+from app.modules.retention.router import router as retention_router
+from app.modules.resource.router import router as resource_router
+from app.modules.gpu.router import router as gpu_router
+from app.modules.data_convert.router import router as data_convert_router
+
+api_router = APIRouter()
+api_router.include_router(health_router, tags=["health"])
+api_router.include_router(data_process_router, tags=["data-process"])
+api_router.include_router(platform_router, tags=["platform"])
+api_router.include_router(system_router, tags=["system"])
+api_router.include_router(tenant_router, tags=["tenant"])
+api_router.include_router(project_router, tags=["project"])
+api_router.include_router(approval_router, tags=["approval"])
+api_router.include_router(retention_router, tags=["retention"])
+api_router.include_router(resource_router, tags=["resource"])
+api_router.include_router(gpu_router, tags=["gpu-assignment"])
+api_router.include_router(data_convert_router, tags=["data-convert"])

backend/app/core/__init__.py

@@ -0,0 +1 @@
+"""Core infrastructure modules."""

backend/app/core/audit.py

@@ -0,0 +1,269 @@
+"""
+审计日志装饰器模块
+
+提供 @audit_log 装饰器，用于自动记录关键业务操作的审计日志。
+
+使用示例：
+    from app.core.audit import audit_log
+
+    @audit_log(action="create_dataset", target_type="dataset")
+    async def create_dataset(request: Request, ...):
+        ...
+"""
+
+from __future__ import annotations
+
+import asyncio
+import functools
+import time
+from datetime import datetime, timezone
+from typing import Any, Callable, Optional, TypeVar
+
+from fastapi import Request
+
+from app.core.logging import get_client_ip, get_logger, mask_sensitive_string, request_id_var
+
+logger = get_logger("app.audit")
+
+F = TypeVar("F", bound=Callable[..., Any])
+
+
+def audit_log(
+    action: str,
+    target_type: str = "",
+    *,
+    detail_template: str = "",
+    extract_target_id: Optional[Callable[[Any], str]] = None,
+) -> Callable[[F], F]:
+    """
+    审计日志装饰器
+
+    Args:
+        action: 操作类型，如 create_dataset、update_model 等
+        target_type: 目标资源类型，如 dataset、model 等
+        detail_template: 日志详情模板（支持 format 参数）
+        extract_target_id: 从返回值中提取目标 ID 的函数
+
+    Returns:
+        装饰后的函数
+    """
+
+    def decorator(func: F) -> F:
+        if asyncio.iscoroutinefunction(func):
+            @functools.wraps(func)
+            async def async_wrapper(*args, **kwargs):
+                started_at = time.perf_counter()
+                trace_id = request_id_var.get("-")
+                try:
+                    result = await func(*args, **kwargs)
+                    elapsed_ms = (time.perf_counter() - started_at) * 1000
+                    target_id = _extract_target_id(result, kwargs, extract_target_id)
+                    detail = _build_detail(detail_template, kwargs)
+                    _record_audit(
+                        action=action,
+                        actor_id=_extract_actor_id(kwargs),
+                        target_type=target_type,
+                        target_id=target_id,
+                        detail=detail,
+                        trace_id=trace_id,
+                        duration_ms=elapsed_ms,
+                        kwargs=kwargs,
+                        args=args,
+                    )
+                    return result
+                except Exception as exc:
+                    _record_audit(
+                        action=action,
+                        actor_id=_extract_actor_id(kwargs),
+                        target_type=target_type,
+                        target_id=_extract_target_id(None, kwargs, extract_target_id),
+                        detail=_build_detail(detail_template, kwargs),
+                        trace_id=trace_id,
+                        duration_ms=(time.perf_counter() - started_at) * 1000,
+                        result="failure",
+                        reason=_safe_exception_reason(exc),
+                        kwargs=kwargs,
+                        args=args,
+                    )
+                    logger.warning("业务操作失败 action=%s reason=%s", action, _safe_exception_reason(exc))
+                    raise
+
+            return async_wrapper  # type: ignore
+        else:
+            @functools.wraps(func)
+            def sync_wrapper(*args, **kwargs):
+                started_at = time.perf_counter()
+                trace_id = request_id_var.get("-")
+                try:
+                    result = func(*args, **kwargs)
+                    elapsed_ms = (time.perf_counter() - started_at) * 1000
+                    target_id = _extract_target_id(result, kwargs, extract_target_id)
+                    detail = _build_detail(detail_template, kwargs)
+                    _record_audit(
+                        action=action,
+                        actor_id=_extract_actor_id(kwargs),
+                        target_type=target_type,
+                        target_id=target_id,
+                        detail=detail,
+                        trace_id=trace_id,
+                        duration_ms=elapsed_ms,
+                        kwargs=kwargs,
+                        args=args,
+                    )
+                    return result
+                except Exception as exc:
+                    _record_audit(
+                        action=action,
+                        actor_id=_extract_actor_id(kwargs),
+                        target_type=target_type,
+                        target_id=_extract_target_id(None, kwargs, extract_target_id),
+                        detail=_build_detail(detail_template, kwargs),
+                        trace_id=trace_id,
+                        duration_ms=(time.perf_counter() - started_at) * 1000,
+                        result="failure",
+                        reason=_safe_exception_reason(exc),
+                        kwargs=kwargs,
+                        args=args,
+                    )
+                    logger.warning("业务操作失败 action=%s reason=%s", action, _safe_exception_reason(exc))
+                    raise
+
+            return sync_wrapper  # type: ignore
+
+    return decorator
+
+
+def _extract_target_id(
+    result: Any, kwargs: dict, extractor: Optional[Callable[[Any], str]]
+) -> Optional[str]:
+    """从返回值或 kwargs 中提取目标 ID"""
+    if extractor:
+        try:
+            return extractor(result)
+        except Exception:
+            pass
+    if isinstance(result, dict):
+        return result.get("id")
+    # 尝试从路径参数中提取
+    for key in ("dataset_id", "model_id", "task_id", "resource_id"):
+        val = kwargs.get(key)
+        if val:
+            return str(val)
+    return None
+
+
+def _build_detail(template: str, kwargs: dict) -> str:
+    """构建审计详情"""
+    if not template:
+        return ""
+    try:
+        return template.format(**kwargs)
+    except (KeyError, IndexError):
+        return template
+
+
+def _record_audit(
+    action: str,
+    actor_id: Optional[str],
+    target_type: str,
+    target_id: Optional[str],
+    detail: str,
+    trace_id: str,
+    duration_ms: float,
+    *,
+    kwargs: dict[str, Any] | None = None,
+    args: tuple[Any, ...] = (),
+    result: str = "success",
+    reason: str | None = None,
+) -> None:
+    """通过已有的 record_audit 方法写入审计日志"""
+    try:
+        from app.db.platform_store import get_platform_store
+
+        store = get_platform_store()
+        kwargs = kwargs or {}
+        request = _extract_request(args, kwargs)
+        current_user = kwargs.get("current_user") or kwargs.get("user") or {}
+        request_id = request.headers.get("X-Request-ID") if request else None
+        request_id = request_id or trace_id
+        client_ip = get_client_ip(request) or None
+        detail_text = f"{detail} trace_id={trace_id} duration_ms={duration_ms:.1f}" if detail else f"trace_id={trace_id} duration_ms={duration_ms:.1f}"
+        store.record_audit(
+            action=action,
+            actor_id=actor_id,
+            target_type=target_type or None,
+            target_id=target_id,
+            tenant_id=str(current_user.get("tenant_id") or "") or None,
+            detail=mask_sensitive_string(detail_text),
+            result=result,
+            reason=mask_sensitive_string(reason or "") or None,
+            request_id=request_id,
+            session_id=str(current_user.get("session_id") or "") or None,
+            ip=client_ip,
+        )
+    except Exception:
+        logger.error("写入审计日志失败 action=%s", action, exc_info=True)
+
+
+def _extract_actor_id(kwargs: dict) -> Optional[str]:
+    """从 FastAPI 注入的当前用户中提取操作人 ID。"""
+    for key in ("current_user", "user"):
+        value = kwargs.get(key)
+        if isinstance(value, dict) and value.get("id"):
+            return str(value["id"])
+    return None
+
+
+def _extract_request(args: tuple[Any, ...], kwargs: dict[str, Any]) -> Request | None:
+    for value in tuple(kwargs.values()) + tuple(args):
+        if isinstance(value, Request):
+            return value
+    return None
+
+
+def _safe_exception_reason(exc: Exception) -> str:
+    """Keep audit failures useful without recording credentials or tokens."""
+    value = getattr(exc, "detail", None) or str(exc) or exc.__class__.__name__
+    return mask_sensitive_string(str(value))[:500]
+
+
+# ==================== 预定义的审计操作常量 ====================
+
+class AuditActions:
+    """预定义的审计操作类型"""
+    # 数据集操作
+    CREATE_DATASET = "create_dataset"
+    UPDATE_DATASET = "update_dataset"
+    DELETE_DATASET = "delete_dataset"
+
+    # 模型操作
+    CREATE_MODEL = "create_model"
+    UPDATE_MODEL = "update_model"
+    DELETE_MODEL = "delete_model"
+
+    # 微调任务
+    CREATE_FINE_TUNE = "create_fine_tune"
+    UPDATE_FINE_TUNE = "update_fine_tune"
+    DELETE_FINE_TUNE = "delete_fine_tune"
+
+    # 推理任务
+    CREATE_INFERENCE = "create_inference"
+    UPDATE_INFERENCE = "update_inference"
+    DELETE_INFERENCE = "delete_inference"
+
+    # 用户管理
+    CREATE_USER = "create_user"
+    UPDATE_USER = "update_user"
+    DELETE_USER = "delete_user"
+
+    # 租户管理
+    CREATE_TENANT = "create_tenant"
+    UPDATE_TENANT = "update_tenant"
+    DELETE_TENANT = "delete_tenant"
+
+    # 权限授权
+    GRANT_ACL = "grant_acl"
+    REVOKE_ACL = "revoke_acl"
+
+    # 系统配置
+    UPDATE_CONFIG = "update_config"

backend/app/core/auth.py

@@ -0,0 +1,615 @@
+"""鉴权依赖：从 Authorization header 解析当前用户，提供权限校验。"""
+from __future__ import annotations
+
+from typing import Any
+import json
+
+from fastapi import Depends, HTTPException, Query, Request, status
+
+from app.db.platform_store import get_platform_store
+from app.core.logging import get_client_ip
+
+# 无需鉴权的路径前缀（健康检查、登录等）
+PUBLIC_PATHS = ("/health", "/login", "/system-info")
+OWNER_TABLES = {
+    "dataset": ("datasets", "created_by"), "model": ("models", "created_by"),
+    "trained_model": ("trained_models", "created_by"), "eval": ("eval_tasks", "created_by"),
+    "fine-tune": ("fine_tune_tasks", "created_by"), "fine_tune_task": ("fine_tune_tasks", "created_by"),
+    "compare": ("compare_tasks", "payload"), "inference": ("compare_tasks", "payload"),
+    "project": ("projects", "create_by"), "data_process": ("data_process_tasks", "created_by"),
+    "data_convert": ("data_convert_tasks", "created_by"),
+}
+RESOURCE_TABLES = {
+    "dataset": "datasets",
+    "model": "models",
+    "trained_model": "trained_models",
+    "eval": "eval_tasks",
+    "fine-tune": "fine_tune_tasks",
+    "fine_tune_task": "fine_tune_tasks",
+    "compare": "compare_tasks",
+    "inference": "compare_tasks",
+    "project": "projects",
+    "data_process": "data_process_tasks",
+    "data_convert": "data_convert_tasks",
+}
+MODULE_PERMISSIONS = {
+    "dashboard": "dashboard",
+    "fine-tune": "fine-tune",
+    "model-eval": "model-eval",
+    "model-compare": "model-inference",
+    "model-inference": "model-inference",
+    "model-chat": "model-inference",
+    "model-manage": "model-manage",
+    "dataset-manage": "dataset",
+    "data-process": "data-process",
+    "data-convert": "data-convert",
+    "compute": "compute",
+    "hardware": "hardware",
+    "users": "user-settings",
+}
+
+# These endpoints are the user-facing compute view used by training,
+# inference, and evaluation forms. They only return the current user's
+# assigned nodes/GPUs in the endpoint implementation, so they must remain
+# available after an approval without granting access to the admin compute
+# management page.
+SELF_SERVICE_COMPUTE_PATHS = {
+    "/compute/nodes",
+    "/compute/gpus",
+    "/compute/my-gpus",
+}
+
+# Resource actions are deliberately kept separate from module permissions.
+# A user may be allowed to open a module while still lacking the action on a
+# specific resource (for example, download or delete).
+RESOURCE_ACTIONS = frozenset({
+    "read",
+    "write",
+    "execute",
+    "download",
+    "export",
+    "delete",
+    "admin",
+})
+RESOURCE_ACTION_ALIASES = {"export": "download"}
+
+
+def _extract_token(request: Request) -> str | None:
+    """从 Authorization header 提取 token（格式: Bearer platform-token-{user_id}）。"""
+    auth = request.headers.get("Authorization", "")
+    token = auth.replace("Bearer ", "").strip()
+    if token.startswith("platform-token-"):
+        return token[len("platform-token-"):]
+    return None
+
+def _session_token(user_id: str, session_id: str) -> str:
+    return f"platform-token-{user_id}.{session_id}"
+
+
+def _record_auth_event(actor_id: str | None, action: str, reason: str, request: Request) -> None:
+    """Best-effort security audit for authentication and permission denials."""
+    try:
+        get_platform_store().record_audit(
+            action=action,
+            actor_id=actor_id,
+            target_type="auth",
+            target_id=request.url.path,
+            detail=reason,
+            result="denied",
+            reason=reason,
+            request_id=request.headers.get("X-Request-ID"),
+            ip=get_client_ip(request) or None,
+        )
+    except Exception:
+        # An audit failure must never turn an authentication decision into an
+        # accidental allow or an unrelated 500 response.
+        pass
+
+
+def get_current_user(request: Request) -> dict[str, Any]:
+    """
+    FastAPI 依赖：解析当前登录用户。
+    - 公开路径（/health, /login 等）直接放行，返回匿名用户。
+    - 无 token 或 token 无效时抛 401。
+    - admin 用户标记为超级管理员，拥有全部权限。
+    """
+    path = request.url.path
+    # 去掉路由前缀后判断
+    for prefix in PUBLIC_PATHS:
+        if path.endswith(prefix):
+            return {"id": None, "username": "anonymous", "role": "viewer", "permissions": [], "protected": False}
+
+    token_value = _extract_token(request)
+    if not token_value:
+        raise HTTPException(status_code=status.HTTP_401_UNAUTHORIZED, detail="missing or invalid token")
+
+    store = get_platform_store()
+    user_id, _, session_id = token_value.partition(".")
+    if session_id:
+        with store.connect() as conn:
+            session = conn.execute(
+                "SELECT user_id, logout_at, expires_at FROM sessions WHERE id=?", (session_id,)
+            ).fetchone()
+        if not session or session["user_id"] != user_id or session["logout_at"]:
+            _record_auth_event(user_id, "auth.session.denied", "session expired or logged out", request)
+            raise HTTPException(status_code=status.HTTP_401_UNAUTHORIZED, detail="session expired")
+        if session["expires_at"]:
+            from datetime import datetime, timezone
+            try:
+                if datetime.fromisoformat(str(session["expires_at"]).replace("Z", "+00:00")) <= datetime.now(timezone.utc):
+                    _record_auth_event(user_id, "auth.session.denied", "session expired", request)
+                    raise HTTPException(status_code=status.HTTP_401_UNAUTHORIZED, detail="session expired")
+            except ValueError:
+                pass
+    with store.connect() as conn:
+        user_row = conn.execute("SELECT * FROM users WHERE id=?", (user_id,)).fetchone()
+    if user_row:
+        user = store._user(user_row)
+        if user.get("status") != "active":
+            _record_auth_event(user_id, "auth.user.disabled", "user is not active", request)
+            raise HTTPException(status_code=status.HTTP_401_UNAUTHORIZED, detail="user disabled")
+        requested_tenant = request.headers.get("X-Tenant-ID", "").strip()
+        if requested_tenant and (is_admin(user) or requested_tenant in user_tenant_ids(user)):
+            user["tenant_id"] = requested_tenant
+        # Keep the session identifier in request context so business audit
+        # records can be traced back to the exact login session.
+        if session_id:
+            user["session_id"] = session_id
+        path_parts = path.strip("/").split("/")
+        # The API may be mounted directly at /modelTF or behind /api/v1/modelTF.
+        # Locate the first known module segment instead of relying on a fixed index.
+        segment = next((part for part in path_parts if part in MODULE_PERMISSIONS), "")
+        required = MODULE_PERMISSIONS.get(segment)
+        relative_path = "/" + "/".join(path_parts[path_parts.index(segment):]) if segment else path
+        self_service_compute = relative_path.rstrip("/") in SELF_SERVICE_COMPUTE_PATHS
+        if (
+            required
+            and not is_admin(user)
+            and required not in (user.get("permissions") or [])
+            and not self_service_compute
+        ):
+            _record_auth_event(user_id, "auth.permission.denied", f"missing permission: {required}", request)
+            raise HTTPException(status_code=status.HTTP_403_FORBIDDEN, detail=f"missing permission: {required}")
+        return user
+    raise HTTPException(status_code=status.HTTP_401_UNAUTHORIZED, detail="user not found")
+
+
+def require_admin(current_user: dict[str, Any] = Depends(get_current_user)) -> dict[str, Any]:
+    """FastAPI 依赖：要求当前用户是平台管理员。"""
+    if is_admin(current_user):
+        return current_user
+    raise HTTPException(status_code=status.HTTP_403_FORBIDDEN, detail="admin permission required")
+
+
+def require_tenant_admin(
+    tenant_id: str,
+    current_user: dict[str, Any] = Depends(get_current_user),
+) -> dict[str, Any]:
+    """Allow platform admins and active owner/admin tenant members."""
+    if is_admin(current_user) or is_tenant_admin(current_user, tenant_id):
+        return current_user
+    raise HTTPException(status_code=status.HTTP_403_FORBIDDEN, detail="tenant admin permission required")
+
+
+def is_admin(user: dict[str, Any]) -> bool:
+    """判断用户是否为平台管理员；兼容历史 role=admin/protected 数据。"""
+    return (
+        user.get("platform_role") == "platform_admin"
+        or user.get("role") == "admin"
+        or user.get("protected", False)
+    )
+
+
+def user_tenant_ids(user: dict[str, Any]) -> set[str]:
+    """Return the tenant scope of a user.
+
+    Existing installations keep the primary tenant on ``users.tenant_id``.
+    ``tenant_members`` is optional during the migration and adds memberships
+    when the permission v2 schema is available.
+    """
+    if is_admin(user):
+        return {"*"}
+    primary_tenant = str(user.get("tenant_id") or "default")
+    result: set[str] = set()
+    user_id = user.get("id")
+    if not user_id:
+        return result
+    try:
+        store = get_platform_store()
+        with store.connect() as conn:
+            rows = conn.execute(
+                "SELECT tenant_id FROM tenant_members "
+                "WHERE user_id=? AND status='active' "
+                "AND (expires_at IS NULL OR expires_at='' OR expires_at > NOW()::text)",
+                (user_id,),
+            ).fetchall()
+            result.update(str(row["tenant_id"]) for row in rows if row.get("tenant_id"))
+            if not result:
+                active_tenant = conn.execute(
+                    "SELECT id FROM tenants WHERE id=? "
+                    "AND COALESCE(status, 'active')='active' "
+                    "AND COALESCE(deleted_at, '')=''",
+                    (primary_tenant,),
+                ).fetchone()
+                if active_tenant:
+                    result.add(primary_tenant)
+    except Exception:
+        # Older databases are upgraded lazily. The primary users.tenant_id
+        # remains a valid fallback until the additive table is available.
+        result.add(primary_tenant)
+    return result
+
+
+def tenant_membership(user: dict[str, Any], tenant_id: str | None = None) -> dict[str, Any] | None:
+    """Return the active membership for the selected tenant, if any."""
+    if is_admin(user):
+        return {"tenant_id": tenant_id or user.get("tenant_id") or "default", "role": "owner", "status": "active"}
+    target = str(tenant_id or user.get("tenant_id") or "default")
+    try:
+        with get_platform_store().connect() as conn:
+            row = conn.execute(
+                "SELECT tenant_id, role, status, expires_at FROM tenant_members "
+                "WHERE tenant_id=? AND user_id=? AND status='active'",
+                (target, user.get("id")),
+            ).fetchone()
+        if not row:
+            return None
+        if row.get("expires_at"):
+            from datetime import datetime, timezone
+            try:
+                if datetime.fromisoformat(str(row["expires_at"]).replace("Z", "+00:00")) <= datetime.now(timezone.utc):
+                    return None
+            except ValueError:
+                return None
+        return dict(row)
+    except Exception:
+        return None
+
+
+def is_tenant_admin(user: dict[str, Any], tenant_id: str | None = None) -> bool:
+    membership = tenant_membership(user, tenant_id)
+    return bool(membership and membership.get("role") in {"owner", "admin"})
+
+
+def is_tenant_admin_for_resource(resource_type: str, resource: dict[str, Any], user: dict[str, Any]) -> bool:
+    if is_admin(user) or resource_type == "model":
+        return False
+    tenant_id = resource_tenant_id(resource_type, resource)
+    return bool(tenant_id and is_tenant_admin(user, tenant_id))
+
+
+def bind_active_tenant(payload: dict[str, Any], user: dict[str, Any]) -> dict[str, Any]:
+    """Bind a new resource to the authenticated tenant context.
+
+    Platform administrators may explicitly create a resource in another
+    active tenant. Ordinary users can only use the tenant selected by the
+    authenticated session/X-Tenant-ID header, never a client-supplied tenant
+    id alone.
+    """
+    requested = str(payload.get("tenant_id") or user.get("tenant_id") or "default")
+    if not is_admin(user) and requested not in user_tenant_ids(user):
+        raise HTTPException(status_code=status.HTTP_403_FORBIDDEN, detail="tenant access denied")
+    payload["tenant_id"] = requested if is_admin(user) else str(user.get("tenant_id") or requested)
+    return payload
+
+
+def resource_record(resource_type: str, resource_id: str) -> dict[str, Any] | None:
+    """Load a resource row for authorization without exposing storage details."""
+    table = RESOURCE_TABLES.get(resource_type)
+    if not table or not resource_id:
+        return None
+    store = get_platform_store()
+    try:
+        with store.connect() as conn:
+            row = conn.execute(f"SELECT * FROM {table} WHERE id=?", (resource_id,)).fetchone()
+    except Exception:
+        return None
+    if not row:
+        return None
+    result = dict(row)
+    if result.get("deleted_at"):
+        return None
+    return result
+
+
+def resource_tenant_id(resource_type: str, resource: dict[str, Any]) -> str | None:
+    """Resolve tenant ownership, including legacy JSON-backed task rows."""
+    # Administrator-created base models are platform shared. Online models
+    # created by ordinary users retain tenant scope, so their visibility can
+    # be limited to the owner and members of that tenant.
+    if resource_type == "model" and str(resource.get("model_source") or "").lower() not in {"api", "online"}:
+        return None
+    tenant_id = resource.get("tenant_id")
+    if tenant_id:
+        return str(tenant_id)
+    payload = resource.get("payload")
+    if payload:
+        try:
+            data = json.loads(payload) if isinstance(payload, str) else payload
+            if isinstance(data, dict) and data.get("tenant_id"):
+                return str(data["tenant_id"])
+        except (TypeError, ValueError, json.JSONDecodeError):
+            pass
+    return None
+
+
+def resource_in_user_tenant(resource_type: str, resource: dict[str, Any], user: dict[str, Any]) -> bool:
+    if is_admin(user):
+        return True
+    if resource_type == "model" and str(resource.get("model_source") or "").lower() not in {"api", "online"}:
+        return True
+    tenant_id = resource_tenant_id(resource_type, resource)
+    if not tenant_id:
+        # A missing tenant is not an implicit shared scope. The migration must
+        # assign historical rows before ordinary users can access them.
+        return False
+    return "*" in user_tenant_ids(user) or tenant_id in user_tenant_ids(user)
+
+
+def has_resource_access(
+    resource_type: str,
+    resource_id: str,
+    user: dict[str, Any],
+    permission: str = "read",
+) -> bool:
+    """
+    检查用户对某资源是否有指定权限。
+    - admin/protected 用户直接放行（旁路）。
+    - 其他用户检查 acls 表中是否有对应授权。
+    """
+    if permission not in RESOURCE_ACTIONS:
+        return False
+    permission = RESOURCE_ACTION_ALIASES.get(permission, permission)
+    if is_admin(user):
+        return True
+
+    store = get_platform_store()
+    resource = resource_record(resource_type, resource_id)
+    if not resource:
+        return False
+    # Some historical datasets were created before tenant_id was introduced.
+    # They are not shared by default, but an explicit user ACL granted by an
+    # administrator is still a valid compatibility path for that legacy row.
+    legacy_unscoped = resource_type != "model" and not resource_tenant_id(resource_type, resource)
+    if not resource_in_user_tenant(resource_type, resource, user) and not legacy_unscoped:
+        return False
+    if resource_type == "model":
+        model_source = str(resource.get("model_source") or "").lower()
+        if permission in {"read", "execute"}:
+            # Local/registered base models are platform resources. For online
+            # models, only administrator-created records are global; a normal
+            # user's online model is shared with the active tenant below.
+            if model_source not in {"api", "online"}:
+                return True
+            creator_id = str(resource.get("created_by") or "")
+            if creator_id:
+                with store.connect() as conn:
+                    creator = conn.execute(
+                        "SELECT platform_role, role, protected FROM users WHERE id=?",
+                        (creator_id,),
+                    ).fetchone()
+                if creator and (
+                    creator.get("platform_role") == "platform_admin"
+                    or creator.get("role") == "admin"
+                    or bool(creator.get("protected"))
+                ):
+                    return True
+            # The tenant check above has already rejected models outside the
+            # user's active tenant. Same-tenant online models are usable.
+            if resource_tenant_id(resource_type, resource) in user_tenant_ids(user):
+                return True
+    if is_tenant_admin_for_resource(resource_type, resource, user):
+        return True
+    acls = store.get_acl(resource_type, resource_id)
+    user_id = user.get("id")
+    # ACL role principals are tenant roles, not platform roles.  Falling back
+    # to the platform role keeps compatibility with old ACL records.
+    membership = tenant_membership(user, resource_tenant_id(resource_type, resource))
+    user_role = (membership or {}).get("role") or user.get("role")
+
+    table_info = OWNER_TABLES.get(resource_type)
+    if table_info and user_id:
+        table, column = table_info
+        with store.connect() as conn:
+            row = conn.execute(f"SELECT {column} FROM {table} WHERE id=?", (resource_id,)).fetchone()
+        if row:
+            owner = row[column]
+            if column == "payload":
+                try:
+                    owner = json.loads(owner or "{}").get("created_by")
+                except (TypeError, ValueError):
+                    owner = None
+            if owner == user_id:
+                return True
+
+    for entry in acls:
+        if entry.get("revoked_at"):
+            continue
+        if entry.get("expires_at"):
+            from datetime import datetime, timezone
+            try:
+                if datetime.fromisoformat(str(entry["expires_at"]).replace("Z", "+00:00")) <= datetime.now(timezone.utc):
+                    continue
+            except ValueError:
+                pass
+        # 按 user 授权
+        if entry.get("principal_type") == "user" and entry.get("principal_id") == user_id:
+            if _permission_covers(entry.get("permission"), permission):
+                return True
+        # 按 role 授权
+        if entry.get("principal_type") == "role" and entry.get("principal_id") == user_role:
+            if _permission_covers(entry.get("permission"), permission):
+                return True
+    return False
+
+
+def _permission_covers(granted: str | None, required: str) -> bool:
+    """权限覆盖判断：write/execute 覆盖 read；admin 覆盖一切。"""
+    if not granted:
+        return False
+    if granted == "admin":
+        return True
+    if granted == required:
+        return True
+    # write 覆盖 read
+    if required == "read" and granted in ("write", "execute"):
+        return True
+    return False
+
+
+def filter_accessible_resource_ids(
+    resource_type: str,
+    all_ids: list[str],
+    user: dict[str, Any],
+) -> list[str]:
+    """
+    从全部资源 ID 中过滤出当前用户可访问的 ID 列表。
+    - admin 直接返回全部。
+    - 普通用户查 acls 表取交集。
+    """
+    if is_admin(user):
+        return all_ids
+
+    if not all_ids:
+        return []
+
+    accessible = filter_accessible_resource_ids_batch(resource_type, all_ids, user)
+    return [rid for rid in all_ids if rid in accessible]
+
+
+def filter_accessible_resource_ids_batch(
+    resource_type: str,
+    resource_ids: list[str],
+    user: dict[str, Any],
+) -> set[str]:
+    """Filter a list endpoint with a bounded set of SQL queries.
+
+    The previous implementation called ``has_resource_access`` once per
+    resource. Each call loaded the resource, tenant membership and ACL again,
+    which made ordinary-user list pages slow on a remote PostgreSQL server.
+    """
+    if is_admin(user):
+        return set(resource_ids)
+    ids = list(dict.fromkeys(str(item) for item in resource_ids if item))
+    if not ids:
+        return set()
+
+    table = RESOURCE_TABLES.get(resource_type)
+    if not table:
+        return set()
+    placeholders = ",".join("?" for _ in ids)
+    primary_tenant = str(user.get("tenant_id") or "default")
+    tenant_ids = {primary_tenant}
+    tenant_roles: dict[str, str] = {primary_tenant: str(user.get("role") or "")}
+    user_id = str(user.get("id") or "")
+    store = get_platform_store()
+    with store.connect() as conn:
+        memberships = conn.execute(
+            "SELECT tenant_id, role FROM tenant_members "
+            "WHERE user_id=? AND status='active' "
+            "AND (expires_at IS NULL OR expires_at='' OR expires_at > NOW()::text)",
+            (user_id,),
+        ).fetchall()
+        for membership in memberships:
+            tenant_id = str(membership["tenant_id"] or "")
+            if tenant_id:
+                tenant_ids.add(tenant_id)
+                tenant_roles[tenant_id] = str(membership["role"] or "")
+
+        rows = conn.execute(
+            f"SELECT * FROM {table} WHERE id IN ({placeholders})", tuple(ids)
+        ).fetchall()
+        row_by_id = {str(row["id"]): dict(row) for row in rows}
+        acl_rows = conn.execute(
+            "SELECT resource_id, principal_type, principal_id, permission, expires_at "
+            f"FROM acls WHERE resource_type=? AND resource_id IN ({placeholders}) "
+            "AND (revoked_at IS NULL OR revoked_at='')",
+            (resource_type, *ids),
+        ).fetchall()
+
+    acl_by_resource: dict[str, list[dict[str, Any]]] = {}
+    for row in acl_rows:
+        acl_by_resource.setdefault(str(row["resource_id"]), []).append(dict(row))
+
+    allowed: set[str] = set()
+    for resource_id in ids:
+        resource = row_by_id.get(resource_id)
+        if not resource or resource.get("deleted_at"):
+            continue
+        if resource_type == "model":
+            model_source = str(resource.get("model_source") or "").lower()
+            if model_source not in {"api", "online"}:
+                allowed.add(resource_id)
+                continue
+            creator_id = str(resource.get("created_by") or "")
+            if creator_id:
+                with store.connect() as conn:
+                    creator = conn.execute(
+                        "SELECT platform_role, role, protected FROM users WHERE id=?",
+                        (creator_id,),
+                    ).fetchone()
+                if creator and (
+                    creator.get("platform_role") == "platform_admin"
+                    or creator.get("role") == "admin"
+                    or bool(creator.get("protected"))
+                ):
+                    allowed.add(resource_id)
+                    continue
+            tenant_id = resource_tenant_id(resource_type, resource)
+            if tenant_id and tenant_id in tenant_ids:
+                allowed.add(resource_id)
+                continue
+        tenant_id = resource_tenant_id(resource_type, resource)
+        if not tenant_id:
+            # Legacy rows without a tenant are never implicitly visible. Only
+            # a direct user ACL can expose one to its explicitly named user;
+            # role ACLs remain blocked until the row is tenant-migrated.
+            for entry in acl_by_resource.get(resource_id, []):
+                expires_at = entry.get("expires_at")
+                if expires_at:
+                    try:
+                        from datetime import datetime, timezone
+                        if datetime.fromisoformat(str(expires_at).replace("Z", "+00:00")) <= datetime.now(timezone.utc):
+                            continue
+                    except ValueError:
+                        continue
+                if (
+                    entry.get("principal_type") == "user"
+                    and entry.get("principal_id") == user_id
+                    and _permission_covers(entry.get("permission"), "read")
+                ):
+                    allowed.add(resource_id)
+                    break
+            continue
+        if tenant_id not in tenant_ids:
+            continue
+        if tenant_roles.get(tenant_id) in {"owner", "admin"}:
+            allowed.add(resource_id)
+            continue
+        owner = resource.get("created_by")
+        if resource_type in {"eval", "fine-tune", "fine_tune_task", "compare", "inference"} and resource.get("payload"):
+            try:
+                payload = json.loads(resource["payload"]) if isinstance(resource["payload"], str) else resource["payload"]
+                if isinstance(payload, dict) and payload.get("created_by"):
+                    owner = payload["created_by"]
+            except (TypeError, ValueError, json.JSONDecodeError):
+                pass
+        if owner == user_id:
+            allowed.add(resource_id)
+            continue
+        role = tenant_roles.get(tenant_id) or str(user.get("role") or "")
+        for entry in acl_by_resource.get(resource_id, []):
+            expires_at = entry.get("expires_at")
+            if expires_at:
+                try:
+                    from datetime import datetime, timezone
+                    if datetime.fromisoformat(str(expires_at).replace("Z", "+00:00")) <= datetime.now(timezone.utc):
+                        continue
+                except ValueError:
+                    continue
+            user_match = entry.get("principal_type") == "user" and entry.get("principal_id") == user_id
+            role_match = entry.get("principal_type") == "role" and entry.get("principal_id") == role
+            if (user_match or role_match) and _permission_covers(entry.get("permission"), "read"):
+                allowed.add(resource_id)
+                break
+    return allowed

backend/app/core/cache_paths.py

@@ -0,0 +1,46 @@
+"""集中管理项目本地缓存目录（HuggingFace / tiktoken）。
+
+所有 Python 库通过环境变量引用 ``<repo_root>/.cache/{huggingface,tiktoken}``，
+避免写入用户家目录，也避免不同部署路径（本地 / Docker）下缓存位置不一致。
+"""
+
+from __future__ import annotations
+
+import os
+from pathlib import Path
+
+
+def repo_root() -> Path:
+    # backend/app/core/cache_paths.py -> backend -> 仓库根目录
+    return Path(__file__).resolve().parents[3]
+
+
+def cache_root() -> Path:
+    return repo_root() / ".cache"
+
+
+def huggingface_cache_dir() -> Path:
+    return cache_root() / "huggingface"
+
+
+def tiktoken_cache_dir() -> Path:
+    return cache_root() / "tiktoken"
+
+
+def setup_local_caches() -> None:
+    """进程启动时统一设置 HF / tiktoken 缓存环境变量，并确保目录存在。
+
+    必须在 import ``docling`` / ``tiktoken`` 等依赖之前调用，否则首次使用会
+    仍然走到默认 ``~/.cache`` 路径。
+    """
+
+    hf_dir = huggingface_cache_dir()
+    tiktoken_dir = tiktoken_cache_dir()
+    hf_dir.mkdir(parents=True, exist_ok=True)
+    (hf_dir / "hub").mkdir(parents=True, exist_ok=True)
+    tiktoken_dir.mkdir(parents=True, exist_ok=True)
+
+    os.environ["HF_HOME"] = str(hf_dir)
+    os.environ["HUGGINGFACE_HUB_CACHE"] = str(hf_dir / "hub")
+    os.environ["HF_HUB_CACHE"] = str(hf_dir / "hub")
+    os.environ["TIKTOKEN_CACHE_DIR"] = str(tiktoken_dir)

backend/app/core/config.py

@@ -0,0 +1,114 @@
+from dataclasses import dataclass
+from functools import lru_cache
+import os
+from typing import Any
+
+try:
+    from pathlib import Path as _Path
+
+    from dotenv import load_dotenv
+
+    # 显式指定 backend 目录下的 .env，并强制覆盖已有环境变量，
+    # 确保远程数据库配置生效，不被本地默认值或残留环境变量影响。
+    _env_path = _Path(__file__).resolve().parent.parent.parent / ".env"
+    load_dotenv(dotenv_path=_env_path, override=True)
+except ImportError:
+    pass
+
+
+def _int_env(name: str, default: int) -> int:
+    raw = os.getenv(name)
+    if raw is None or raw == "":
+        return default
+    return int(raw)
+
+
+def _list_env(name: str, default: list[str]) -> list[str]:
+    raw = os.getenv(name)
+    if raw is None or raw.strip() == "":
+        return default
+    return [item.strip() for item in raw.split(",") if item.strip()]
+
+
+def _bool_env(name: str, default: bool) -> bool:
+    raw = os.getenv(name)
+    if raw is None or raw.strip() == "":
+        return default
+    return raw.strip().lower() in {"1", "true", "yes", "on"}
+
+
+def docs_kwargs(enabled: bool) -> dict[str, Any]:
+    """Swagger UI / ReDoc / OpenAPI schema 路由开关。
+
+    关闭时 FastAPI 不注册 /docs、/redoc、/openapi.json，访问一律返回 404，
+    避免未授权访问泄露 API 结构。
+    """
+    if enabled:
+        return {}
+    return {"docs_url": None, "redoc_url": None, "openapi_url": None}
+
+
+@dataclass(frozen=True)
+class Settings:
+    app_name: str = os.getenv("APP_NAME", "YG Zhilian API")
+    app_env: str = os.getenv("APP_ENV", "local")
+    route_prefix: str = os.getenv("MODELTF_ROUTE_PREFIX", "/modelTF")
+    app_mode: str = os.getenv("APP_MODE", "local")
+    database_url: str = os.getenv("DATABASE_URL", "postgresql+psycopg://yg_ft:change_me@localhost:15432/yg_ft")
+    cors_allow_origins: list[str] = None  # type: ignore[assignment]
+    compute_mode: str = os.getenv("COMPUTE_MODE", "real")
+    compute_status_sync_mode: str = os.getenv("COMPUTE_STATUS_SYNC_MODE", "polling")
+    compute_poll_interval_seconds: int = _int_env("COMPUTE_POLL_INTERVAL_SECONDS", 3)
+    compute_request_timeout_seconds: int = _int_env("COMPUTE_REQUEST_TIMEOUT_SECONDS", 5)
+    minio_enabled: bool = _bool_env("MINIO_ENABLED", False)
+    # MinIO is an independent service and may run on another host. The
+    # endpoint must therefore be reachable from the Backend container.
+    minio_endpoint: str = os.getenv("MINIO_ENDPOINT", "http://host.docker.internal:19000")
+    minio_access_key: str = os.getenv("MINIO_ACCESS_KEY", "minioadmin")
+    minio_secret_key: str = os.getenv("MINIO_SECRET_KEY", "minioadmin")
+    minio_bucket: str = os.getenv("MINIO_BUCKET", "yg-ft-resources")
+    minio_secure: bool = _bool_env("MINIO_SECURE", False)
+    # Small text/data files stay inline in PostgreSQL to avoid unnecessary
+    # MinIO round trips. Larger files remain the shared canonical objects.
+    minio_inline_max_bytes: int = _int_env("MINIO_INLINE_MAX_BYTES", 256 * 1024)
+    minio_presign_max_bytes: int = _int_env("MINIO_PRESIGN_MAX_BYTES", 1024 * 1024 * 1024 * 1024)
+    storage_wait_seconds: int = _int_env("STORAGE_WAIT_SECONDS", 300)
+    storage_check_interval_seconds: int = _int_env("STORAGE_CHECK_INTERVAL_SECONDS", 10)
+    compute_service_token: str = os.getenv("COMPUTE_SERVICE_TOKEN", "")
+    log_level: str = os.getenv("LOG_LEVEL", "INFO")
+    log_dir: str = os.getenv("LOG_DIR", "./logs")
+    log_file_prefix: str = os.getenv("LOG_FILE_PREFIX", "backend")
+    log_error_file_prefix: str = os.getenv("LOG_ERROR_FILE_PREFIX", "error")
+    log_max_bytes: int = _int_env("LOG_MAX_BYTES", 20 * 1024 * 1024)
+    log_retention_days: int = _int_env("LOG_RETENTION_DAYS", 10)
+    enable_docs: bool = None  # type: ignore[assignment]
+
+    def __post_init__(self) -> None:
+        object.__setattr__(
+            self,
+            "cors_allow_origins",
+            _list_env(
+                "CORS_ALLOW_ORIGINS",
+                [
+                    "http://localhost:16801",
+                    "http://127.0.0.1:16801",
+                    "http://localhost:17861",
+                    "http://127.0.0.1:17861",
+                ],
+            ),
+        )
+        # Swagger UI / ReDoc / OpenAPI 文档路由开关：
+        # 未显式配置 ENABLE_DOCS 时，仅本地/开发环境开放，生产环境默认关闭，
+        # 避免未授权访问泄露 API 结构。从运行时环境读取 APP_ENV，而非类定义时
+        # 缓存的默认值，保证生产默认关闭始终生效且便于测试。
+        object.__setattr__(
+            self,
+            "enable_docs",
+            _bool_env("ENABLE_DOCS", os.getenv("APP_ENV", "local") != "prod"),
+        )
+
+
+@lru_cache
+def get_settings() -> Settings:
+    return Settings()
+

backend/app/core/logging.py

@@ -0,0 +1,682 @@
+from __future__ import annotations
+
+import json
+import logging
+import re
+import socket
+import sys
+import time
+from contextvars import ContextVar
+from datetime import date, datetime, timedelta
+from logging import Handler, LogRecord
+from pathlib import Path
+from typing import Any, Callable
+from uuid import uuid4
+
+from fastapi import FastAPI, Request
+
+from app.core.config import Settings, get_settings
+
+# ==================== 链路追踪 ContextVar ====================
+
+request_id_var: ContextVar[str] = ContextVar("request_id", default="-")
+user_id_var: ContextVar[str] = ContextVar("user_id", default="")
+client_ip_var: ContextVar[str] = ContextVar("client_ip", default="")
+
+
+def get_client_ip(request: Request | None) -> str:
+    """获取客户端地址，兼容前置反向代理传递的真实地址。"""
+    if request is None:
+        return ""
+    for header in ("X-Real-IP", "X-Forwarded-For"):
+        value = request.headers.get(header, "")
+        if value:
+            return value.split(",", 1)[0].strip()
+    return request.client.host if request.client else ""
+
+# ==================== 敏感数据脱敏 ====================
+
+SENSITIVE_KEYS: set[str] = {
+    "password", "token", "access_token", "refresh_token",
+    "secret_key", "authorization", "bearer", "api_key",
+    "private_key", "secret", "cookie",
+}
+
+FULL_MASK_KEYS: set[str] = {
+    "password", "token", "access_token", "refresh_token",
+    "secret_key", "authorization", "bearer", "api_key",
+    "private_key", "secret", "cookie",
+}
+
+
+def _mask_phone(value: str) -> str:
+    """手机号脱敏：138****5678"""
+    if len(value) >= 11:
+        return value[:3] + "****" + value[-4:]
+    return value
+
+
+def _mask_id_card(value: str) -> str:
+    """身份证号脱敏：110***********1234"""
+    if len(value) >= 18:
+        return value[:3] + "***********" + value[-4:]
+    return value
+
+
+def mask_value(key: str, value: Any) -> Any:
+    """对单个值进行脱敏处理。"""
+    if value is None:
+        return ""
+    key_lower = key.lower()
+    if key_lower in FULL_MASK_KEYS:
+        return "***"
+    str_val = str(value)
+    # 手机号模式（11位数字，1开头）
+    if re.match(r"^1[3-9]\d{9}$", str_val):
+        return _mask_phone(str_val)
+    # 身份证模式（18位）
+    if re.match(r"^\d{17}[\dXx]$", str_val):
+        return _mask_id_card(str_val)
+    return value
+
+
+def mask_sensitive_dict(data: dict) -> dict:
+    """递归脱敏字典中的敏感字段。"""
+    if not data or not isinstance(data, dict):
+        return data
+    result: dict[str, Any] = {}
+    for key, value in data.items():
+        if isinstance(value, dict):
+            result[key] = mask_sensitive_dict(value)
+        elif isinstance(value, list):
+            result[key] = [
+                mask_sensitive_dict(item) if isinstance(item, dict) else item
+                for item in value
+            ]
+        else:
+            result[key] = mask_value(key, value)
+    return result
+
+
+def mask_sensitive_string(text: str) -> str:
+    """从文本中脱敏常见敏感信息。"""
+    if not text:
+        return text
+    # Mask the value as well as the key. Replacing only ``api_key=`` would
+    # still leak the credential in audit messages and exception text.
+    assignment_pattern = (
+        r"(Bearer\s+|(?:api[-_]?key|access[_-]?token|refresh[_-]?token|"
+        r"secret[_-]?key|password|private[_-]?key|token)\s*[:=]\s*)"
+        r"(\"[^\"]*\"|'[^']*'|[^\s,;]+)"
+    )
+    try:
+        text = re.sub(assignment_pattern, r"\1***", text, flags=re.IGNORECASE)
+    except re.error:
+        pass
+
+    patterns: list[tuple[str, str]] = [
+        (r"Bearer\s+[A-Za-z0-9\-._]+", "Bearer ***"),
+        (r"(?i)token\s*[:=]\s*\S+", "token=***"),
+        (r"(?i)password\s*[:=]\s*\S+", "password=***"),
+        (r"(?i)secret[_-]?key\s*[:=]\s*\S+", "secret_key=***"),
+        (r"(?i)api[-_]?key\s*[:=]\s*\S+", "api_key=***"),
+        (r"(?i)private[_-]?key\s*[:=]\s*\S+", "private_key=***"),
+        (r"(?i)authorization\s*[:=]\s*\S+", "authorization=***"),
+    ]
+    for pattern, replacement in patterns:
+        text = re.sub(pattern, replacement, text)
+    # 手机号脱敏
+    text = re.sub(r"\b1[3-9]\d{9}\b", lambda m: _mask_phone(m.group()), text)
+    return text
+
+
+# ==================== 大对象截断 ====================
+
+MAX_FIELD_SIZE = 1024  # 超过 1KB 的内容自动截断
+
+
+def truncate_large_value(value: Any, max_size: int = MAX_FIELD_SIZE) -> Any:
+    """超过 max_size 的字符串自动截断（前 500 + 后 500）。"""
+    if isinstance(value, str) and len(value) > max_size:
+        half = max_size // 2
+        return value[:half] + f"...[truncated {len(value) - max_size} chars]..." + value[-half:]
+    if isinstance(value, dict):
+        return {k: truncate_large_value(v, max_size) for k, v in value.items()}
+    if isinstance(value, list):
+        return [truncate_large_value(v, max_size) for v in value]
+    return value
+
+
+# ==================== TraceId Filter ====================
+
+class TraceIdFilter(logging.Filter):
+    """自动注入 traceId / userId / clientIp 到每条日志记录。"""
+
+    def filter(self, record: LogRecord) -> bool:
+        record.traceId = request_id_var.get()
+        record.userId = user_id_var.get("")
+        record.clientIp = client_ip_var.get("")
+        record.host = getattr(self, "_host", None) or socket.gethostname()
+        record.app = getattr(self, "_app", "yg-ft-platform")
+        record.env = getattr(self, "_env", "dev")
+        return True
+
+    def set_context(self, app: str, env: str, host: str) -> None:
+        self._app = app
+        self._env = env
+        self._host = host
+
+
+# ==================== JSON Formatter ====================
+
+class JsonLogFormatter(logging.Formatter):
+    """
+    生产级 JSON 日志格式化器，符合方案文档 §3.2 字段规范。
+
+    输出示例：
+    {
+      "@timestamp": "2026-08-19T10:30:45.123+08:00",
+      "level": "INFO",
+      "logger": "app.api.v1.endpoints.platform",
+      "traceId": "abc-123-def-456",
+      "userId": "u_admin",
+      "message": "数据集创建成功",
+      "fields": {"datasetId": "ds_001", "costMs": 23},
+      "file": "platform.py:156",
+      "thread": "MainThread",
+      "host": "pod-7x9k2",
+      "app": "yg-ft-platform",
+      "env": "dev"
+    }
+    """
+
+    # 标准 LogRecord 属性名集合，用于区分 extra 字段
+    _STD_ATTRS: set[str] = set(vars(logging.LogRecord("", 0, "", 0, "", None, None)).keys()) | {
+        "traceId", "userId", "clientIp", "host", "app", "env",
+        "request_id", "user_id", "client_ip",
+        "asctime", "message", "module", "function", "process",
+        "thread", "threadName", "levelname", "levelno", "name",
+        "pathname", "filename", "lineno", "funcName", "created",
+        "msecs", "relativeCreated", "exc_info", "exc_text",
+        "stack_info", "msg", "args", "processName", "process",
+    }
+
+    def format(self, record: LogRecord) -> str:
+        # 时间戳：ISO8601 带时区
+        timestamp = datetime.fromtimestamp(record.created).astimezone().isoformat(
+            timespec="milliseconds"
+        )
+
+        payload: dict[str, Any] = {
+            "@timestamp": timestamp,
+            "level": record.levelname,
+            "logger": record.name,
+            "traceId": getattr(record, "traceId", "-"),
+            "message": record.getMessage(),
+            "file": f"{Path(record.pathname).name}:{record.lineno}",
+            "thread": record.threadName,
+            "host": getattr(record, "host", ""),
+            "app": getattr(record, "app", ""),
+            "env": getattr(record, "env", ""),
+        }
+
+        # userId（业务必填，未登录可为空）
+        user_id = getattr(record, "userId", "") or getattr(record, "user_id", "")
+        if user_id:
+            payload["userId"] = user_id
+
+        # clientIp
+        client_ip = getattr(record, "clientIp", "") or getattr(record, "client_ip", "")
+        if client_ip:
+            payload["clientIp"] = client_ip
+
+        # 提取结构化业务字段：只收集通过 extra 传入的非标准属性
+        fields: dict[str, Any] = {}
+        for attr in dir(record):
+            if attr.startswith("_"):
+                continue
+            if attr in self._STD_ATTRS:
+                continue
+            if attr in ("traceId", "userId", "clientIp", "host", "app", "env"):
+                continue
+            val = getattr(record, attr, None)
+            if val is not None and not callable(val):
+                fields[attr] = truncate_large_value(val)
+        if fields:
+            payload["fields"] = mask_sensitive_dict(fields)
+
+        # ERROR 级别额外字段
+        if record.levelname == "ERROR" or record.exc_info:
+            error_obj: dict[str, Any] = {
+                "type": type(record.exc_info[1]).__name__ if record.exc_info and record.exc_info[1] else "Error",
+                "message": record.getMessage(),
+            }
+            if record.exc_info:
+                error_obj["stack_trace"] = self.formatException(record.exc_info)
+            if record.stack_info:
+                error_obj["stack_trace"] = self.formatStack(record.stack_info)
+            payload["error"] = error_obj
+
+        # 兼容旧字段名 exception
+        if record.exc_info and "error" not in payload:
+            payload["exception"] = self.formatException(record.exc_info)
+
+        return json.dumps(payload, ensure_ascii=False, separators=(",", ":"))
+
+
+# ==================== DateSizeRotatingFileHandler ====================
+
+class DateSizeRotatingFileHandler(Handler):
+    """按日期+大小滚动的文件日志处理器。
+
+    - 按天创建文件，文件名包含日期
+    - 单文件超过 max_bytes 时自动滚动（带序号后缀）
+    - 自动清理超过 retention_days 的旧日志
+    """
+
+    def __init__(
+        self,
+        log_dir: str | Path,
+        file_prefix: str,
+        max_bytes: int,
+        retention_days: int,
+        encoding: str = "utf-8",
+    ) -> None:
+        super().__init__()
+        self.log_dir = Path(log_dir)
+        self.file_prefix = file_prefix
+        self.max_bytes = max_bytes
+        self.retention_days = retention_days
+        self.encoding = encoding
+        self._current_date: date | None = None
+        self._stream: Any | None = None
+        self._current_path: Path | None = None
+        self.log_dir.mkdir(parents=True, exist_ok=True)
+
+    def emit(self, record: LogRecord) -> None:
+        try:
+            message = self.format(record) + self.terminator
+            encoded_size = len(message.encode(self.encoding))
+            self._ensure_stream()
+            if self._should_rotate(encoded_size):
+                self._rotate_by_size()
+                self._ensure_stream(force=True)
+            self._stream.write(message)
+            self.flush()
+            self._cleanup_expired_files()
+        except Exception:
+            self.handleError(record)
+
+    @property
+    def terminator(self) -> str:
+        return "\n"
+
+    def flush(self) -> None:
+        if self._stream and not self._stream.closed:
+            self._stream.flush()
+
+    def close(self) -> None:
+        try:
+            if self._stream and not self._stream.closed:
+                self._stream.close()
+        finally:
+            self._stream = None
+            super().close()
+
+    def _dated_path(self, target_date: date) -> Path:
+        return self.log_dir / f"{self.file_prefix}-{target_date.isoformat()}.log"
+
+    def _ensure_stream(self, force: bool = False) -> None:
+        today = date.today()
+        if not force and self._stream and self._current_date == today:
+            return
+        if self._stream and not self._stream.closed:
+            self._stream.close()
+        self._current_date = today
+        self._current_path = self._dated_path(today)
+        self._stream = self._current_path.open("a", encoding=self.encoding)
+
+    def _should_rotate(self, incoming_size: int) -> bool:
+        if not self._current_path or self.max_bytes <= 0:
+            return False
+        if not self._current_path.exists():
+            return False
+        return self._current_path.stat().st_size + incoming_size > self.max_bytes
+
+    def _rotate_by_size(self) -> None:
+        if not self._current_path or not self._current_path.exists():
+            return
+        if self._stream and not self._stream.closed:
+            self._stream.close()
+            self._stream = None
+        stem = self._current_path.stem
+        suffix = self._current_path.suffix
+        index = 1
+        while True:
+            rotated_path = self.log_dir / f"{stem}.{index}{suffix}"
+            if not rotated_path.exists():
+                self._current_path.rename(rotated_path)
+                return
+            index += 1
+
+    def _cleanup_expired_files(self) -> None:
+        if self.retention_days <= 0:
+            return
+        cutoff = date.today() - timedelta(days=self.retention_days - 1)
+        pattern = re.compile(
+            rf"^{re.escape(self.file_prefix)}-(\d{{4}}-\d{{2}}-\d{{2}})(?:\.\d+)?\.log$"
+        )
+        for path in self.log_dir.glob(f"{self.file_prefix}-*.log"):
+            match = pattern.match(path.name)
+            if not match:
+                continue
+            file_date = datetime.strptime(match.group(1), "%Y-%m-%d").date()
+            if file_date < cutoff:
+                path.unlink(missing_ok=True)
+
+
+# ==================== StructuredLogger 封装 ====================
+
+class StructuredLogger:
+    """
+    结构化日志记录器，提供符合方案文档 §4.2 的 5W1H 日志接口。
+
+    使用方式：
+        logger = get_structured_logger('app.api.dataset')
+        logger.info('数据集创建成功', datasetId='ds_001', costMs=23)
+    """
+
+    def __init__(self, name: str, module: str = ""):
+        self.logger = logging.getLogger(name)
+        self.name = name
+        self.module = module
+
+    @property
+    def trace_id(self) -> str:
+        return request_id_var.get("-")
+
+    def info(self, message: str, **fields: Any) -> None:
+        self._log(logging.INFO, message, **fields)
+
+    def warning(self, message: str, **fields: Any) -> None:
+        self._log(logging.WARNING, message, **fields)
+
+    def error(self, message: str, **fields: Any) -> None:
+        self._log(logging.ERROR, message, **fields)
+
+    def debug(self, message: str, **fields: Any) -> None:
+        self._log(logging.DEBUG, message, **fields)
+
+    def _log(self, level: int, message: str, **fields: Any) -> None:
+        """统一日志记录方法，通过 extra 传递结构化字段。"""
+        extra: dict[str, Any] = {}
+        if self.module:
+            extra["module"] = self.module
+        # 脱敏 + 截断
+        for k, v in fields.items():
+            extra[k] = truncate_large_value(v)
+        self.logger.log(level, message, extra=extra, stack_info=False)
+
+
+def get_structured_logger(name: str, module: str = "") -> StructuredLogger:
+    """获取结构化日志记录器。"""
+    return StructuredLogger(name, module)
+
+
+# ==================== 快捷函数 ====================
+
+def get_logger(name: str) -> logging.Logger:
+    """获取标准 Python logger。"""
+    return logging.getLogger(name)
+
+
+def set_request_id(request_id: str) -> None:
+    """设置当前请求的追踪 ID。"""
+    request_id_var.set(request_id)
+
+
+def set_user_context(user_id: str = "", client_ip: str = "") -> None:
+    """设置当前请求的用户上下文（在鉴权后调用）。"""
+    if user_id:
+        user_id_var.set(user_id)
+    if client_ip:
+        client_ip_var.set(client_ip)
+
+
+# ==================== 请求日志中间件 ====================
+
+def setup_request_logging(app: FastAPI) -> None:
+    """配置 FastAPI 请求日志中间件，符合方案文档 §五（链路追踪）和 §十（访问日志）。"""
+    logger = get_logger("app.access")
+
+    @app.middleware("http")
+    async def request_logging_middleware(request: Request, call_next):  # type: ignore[no-untyped-def]
+        # 入口生成 traceId（优先使用前端传入的 X-Trace-Id）
+        trace_id = request.headers.get("X-Trace-Id") or request.headers.get("X-Request-ID") or str(uuid4())
+        token = request_id_var.set(trace_id)
+        ip_token = client_ip_var.set(get_client_ip(request))
+        started_at = time.perf_counter()
+
+        # 提取客户端 IP
+        client_ip = "-"
+        if request.client:
+            client_ip = request.client.host
+        # 支持反向代理传递的真实 IP
+        forwarded_for = request.headers.get("X-Forwarded-For", "")
+        if forwarded_for:
+            client_ip = forwarded_for.split(",")[0].strip()
+        client_ip_var.set(client_ip)
+
+        try:
+            response = await call_next(request)
+            elapsed_ms = (time.perf_counter() - started_at) * 1000
+
+            # 噪声路径降级为 DEBUG（健康检查等）
+            noisy_paths = ("/health", "/system-info", "/compute/jobs/", "/model-eval/", "/model-compare/")
+            log_method = logger.info
+            if any(request.url.path.endswith(p) or p in request.url.path for p in noisy_paths) and response.status_code < 400:
+                log_method = logger.debug
+            if response.status_code >= 500:
+                log_method = logger.error
+            elif response.status_code >= 400:
+                log_method = logger.warning
+
+            # 结构化访问日志（中文 message，方便直接阅读）
+            log_method(
+                f"HTTP请求 {request.method} {request.url.path} → {response.status_code}（耗时{round(elapsed_ms, 2)}ms）",
+                extra={
+                    "request_method": request.method,
+                    "request_path": request.url.path,
+                    "status_code": response.status_code,
+                    "duration_ms": round(elapsed_ms, 2),
+                    "client_ip": client_ip,
+                    "user_agent": request.headers.get("User-Agent", "")[:200],
+                },
+            )
+
+            # 5xx 系统错误自动写入操作日志
+            if response.status_code >= 500:
+                try:
+                    from app.core.op_log import log_operation, OpModule, OpStatus
+                    log_operation(
+                        module=OpModule.SYSTEM,
+                        action="request",
+                        target_type="api",
+                        target_name=request.url.path,
+                        status=OpStatus.FAILURE,
+                        error_message=f"HTTP {response.status_code} - 系统内部错误",
+                        error_type="HTTPError",
+                        detail=f'{{"method":"{request.method}","path":"{request.url.path}","status":{response.status_code}}}',
+                        func_name="request_logging_middleware",
+                        request=request,
+                        duration_ms=elapsed_ms,
+                    )
+                except Exception:
+                    pass
+
+            response.headers["X-Trace-Id"] = trace_id
+            response.headers["X-Request-ID"] = trace_id
+            return response
+
+        except Exception:
+            elapsed_ms = (time.perf_counter() - started_at) * 1000
+            logger.error(
+                f"HTTP请求异常 {request.method} {request.url.path}（耗时{round(elapsed_ms, 2)}ms）— 服务内部错误",
+                extra={
+                    "request_method": request.method,
+                    "request_path": request.url.path,
+                    "duration_ms": round(elapsed_ms, 2),
+                    "client_ip": client_ip,
+                },
+                exc_info=True,
+            )
+
+            # 未被捕获的异常，写入操作日志
+            try:
+                import traceback as _tb
+                from app.core.op_log import log_operation, OpModule, OpStatus
+                log_operation(
+                    module=OpModule.SYSTEM,
+                    action="request",
+                    target_type="api",
+                    target_name=request.url.path,
+                    status=OpStatus.FAILURE,
+                    error_message=str(sys.exc_info()[1])[:1000] if sys.exc_info()[1] else "未知异常",
+                    error_type=type(sys.exc_info()[1]).__name__ if sys.exc_info()[1] else "UnknownError",
+                    error_traceback="".join(_tb.format_exception(*sys.exc_info()))[:5000],
+                    func_name="request_logging_middleware",
+                    detail=f'{{"method":"{request.method}","path":"{request.url.path}"}}',
+                    request=request,
+                    duration_ms=elapsed_ms,
+                )
+            except Exception:
+                pass
+
+            raise
+        finally:
+            request_id_var.reset(token)
+            client_ip_var.reset(ip_token)
+
+
+# ==================== 配置函数 ====================
+
+def configure_logging(settings: Settings | None = None) -> None:
+    """
+    生产级日志配置，符合方案文档 §二（分类分流）和 §六（性能安全）。
+
+    日志分类：
+    - 业务日志 (app-biz):  INFO+ 业务流程（保留 7 天）
+    - 系统日志 (app-sys):  框架/中间件日志（保留 7 天）
+    - 访问日志 (app-access): HTTP 请求日志（保留 15 天）
+    - 错误日志 (app-error): ERROR 级别（保留 30 天）
+    """
+    settings = settings or get_settings()
+
+    root_logger = logging.getLogger()
+    root_logger.handlers.clear()
+    root_logger.setLevel(settings.log_level.upper())
+
+    # ---- Formatter ----
+    console_formatter = logging.Formatter(
+        fmt=(
+            "%(asctime)s | %(levelname)s | pid=%(process)d | %(threadName)s | "
+            "traceId=%(traceId)s | %(name)s | %(pathname)s:%(lineno)d | %(message)s"
+        ),
+        datefmt="%Y-%m-%d %H:%M:%S",
+    )
+    json_formatter = JsonLogFormatter()
+
+    # ---- TraceIdFilter（全局注入 traceId/userId/host/app/env）----
+    trace_filter = TraceIdFilter()
+    trace_filter.set_context(
+        app=settings.app_name,
+        env=settings.app_env,
+        host=socket.gethostname(),
+    )
+
+    # ---- 控制台 Handler ----
+    console_handler = logging.StreamHandler()
+    console_handler.setFormatter(console_formatter)
+    console_handler.addFilter(trace_filter)
+
+    # ---- 业务日志文件 Handler (app-biz) ----
+    biz_file_handler = DateSizeRotatingFileHandler(
+        log_dir=settings.log_dir,
+        file_prefix="app-biz",
+        max_bytes=settings.log_max_bytes,
+        retention_days=7,
+    )
+    biz_file_handler.setFormatter(json_formatter)
+    biz_file_handler.addFilter(trace_filter)
+
+    # ---- 访问日志文件 Handler (app-access) ----
+    access_file_handler = DateSizeRotatingFileHandler(
+        log_dir=settings.log_dir,
+        file_prefix="app-access",
+        max_bytes=settings.log_max_bytes,
+        retention_days=15,
+    )
+    access_file_handler.setFormatter(json_formatter)
+    access_file_handler.addFilter(trace_filter)
+
+    # ---- 错误日志文件 Handler (app-error) ----
+    error_file_handler = DateSizeRotatingFileHandler(
+        log_dir=settings.log_dir,
+        file_prefix="app-error",
+        max_bytes=settings.log_max_bytes,
+        retention_days=30,
+    )
+    error_file_handler.setLevel(logging.ERROR)
+    error_file_handler.setFormatter(json_formatter)
+    error_file_handler.addFilter(trace_filter)
+
+    # ---- 注册 Handler ----
+    root_logger.addHandler(console_handler)
+    root_logger.addHandler(biz_file_handler)
+    root_logger.addHandler(access_file_handler)
+    root_logger.addHandler(error_file_handler)
+
+    # ---- 访问日志 Logger 独立路由到访问日志文件 ----
+    access_logger = logging.getLogger("app.access")
+    access_logger.propagate = False  # 不向 root 传播，避免重复写入业务日志
+    access_logger.addHandler(console_handler)
+    access_logger.addHandler(access_file_handler)
+    # 访问日志中的 ERROR 也要进错误日志
+    access_logger.addHandler(error_file_handler)
+
+    # ---- 框架类 Logger 降级 ----
+    for logger_name in ("uvicorn", "uvicorn.error", "uvicorn.access"):
+        lg = logging.getLogger(logger_name)
+        lg.handlers.clear()
+        lg.propagate = True
+
+    # 框架类日志归入系统日志，生产环境设为 WARN
+    logging.getLogger("uvicorn.access").setLevel(logging.WARNING)
+    logging.getLogger("psycopg.pool").setLevel(logging.ERROR)
+    logging.getLogger("httpx").setLevel(logging.WARNING)
+
+    # ---- 兼容旧文件前缀（向后兼容）----
+    # 如果配置了旧的 log_file_prefix，也创建一个对应的 handler
+    if settings.log_file_prefix and settings.log_file_prefix != "app-biz":
+        legacy_file_handler = DateSizeRotatingFileHandler(
+            log_dir=settings.log_dir,
+            file_prefix=settings.log_file_prefix,
+            max_bytes=settings.log_max_bytes,
+            retention_days=settings.log_retention_days,
+        )
+        legacy_file_handler.setFormatter(json_formatter)
+        legacy_file_handler.addFilter(trace_filter)
+        root_logger.addHandler(legacy_file_handler)
+
+    # 旧错误日志前缀兼容
+    if settings.log_error_file_prefix and settings.log_error_file_prefix != "app-error":
+        legacy_error_handler = DateSizeRotatingFileHandler(
+            log_dir=settings.log_dir,
+            file_prefix=settings.log_error_file_prefix,
+            max_bytes=settings.log_max_bytes,
+            retention_days=settings.log_retention_days,
+        )
+        legacy_error_handler.setLevel(logging.ERROR)
+        legacy_error_handler.setFormatter(json_formatter)
+        legacy_error_handler.addFilter(trace_filter)
+        root_logger.addHandler(legacy_error_handler)

backend/app/core/op_log.py

@@ -0,0 +1,503 @@
+"""
+操作日志工具模块
+
+提供 @op_log 装饰器和 log_operation 函数，用于记录用户在各业务模块的详细操作。
+自动捕获成功/失败状态、完整报错堆栈、操作耗时等。
+
+核心设计：
+  - 失败操作必须清晰记录完整异常堆栈（traceback）
+  - 记录异常类型（如 RuntimeError / ValueError / ConnectionError）
+  - 记录具体出错的函数名和文件位置，方便定位 bug
+  - 记录 HTTP 状态码，方便区分用户错误(4xx)和系统错误(5xx)
+
+使用示例：
+    from app.core.op_log import op_log, OpModule, OpAction
+
+    @router.post("/inference/start")
+    @op_log(module=OpModule.INFERENCE, action=OpAction.START, target_type="inference")
+    async def start_inference(...):
+        ...
+"""
+
+from __future__ import annotations
+
+import asyncio
+import functools
+import json
+import time
+import traceback
+from datetime import datetime, timezone
+from typing import Any, Callable, Optional, TypeVar
+
+from fastapi import Request
+
+from app.core.logging import get_logger, get_structured_logger, request_id_var
+from app.db.platform_store import get_platform_store, new_id, utcnow
+
+logger = get_logger("app.op_log")
+biz_logger = get_structured_logger("app.biz")
+
+F = TypeVar("F", bound=Callable[..., Any])
+
+
+class OpModule:
+    """业务模块常量"""
+    FINE_TUNE = "fine-tune"           # 模型训练
+    MODEL_EVAL = "model-eval"         # 模型评测
+    INFERENCE = "model-inference"     # 模型推理
+    MODEL_MANAGE = "model-manage"     # 模型管理
+    DATASET = "dataset"               # 数据集
+    DATA_PROCESS = "data-process"    # 数据处理
+    DATA_CONVERT = "data-convert"     # 数据类型转换
+    COMPUTE = "compute"              # 算力节点
+    SYSTEM = "system"                # 系统
+
+
+class OpAction:
+    """操作动作常量"""
+    CREATE = "create"
+    UPDATE = "update"
+    DELETE = "delete"
+    START = "start"
+    STOP = "stop"
+    UPLOAD = "upload"
+    DOWNLOAD = "download"
+    CONVERT = "convert"
+    MERGE = "merge"
+    IMPORT = "import"
+    LOGIN = "login"
+    LOGOUT = "logout"
+    PUBLISH = "publish"
+    RETRY = "retry"
+
+
+class OpStatus:
+    """操作状态常量"""
+    SUCCESS = "success"
+    FAILURE = "failure"
+
+
+# ==================== 中文映射表（让日志 message 直接可读）====================
+
+MODULE_CN: dict[str, str] = {
+    "fine-tune": "模型训练",
+    "model-eval": "模型评测",
+    "model-inference": "模型推理",
+    "model-manage": "模型管理",
+    "dataset": "数据集",
+    "data-process": "数据处理",
+    "data-convert": "数据转换",
+    "compute": "算力节点",
+    "system": "系统",
+}
+
+ACTION_CN: dict[str, str] = {
+    "create": "创建",
+    "update": "更新",
+    "delete": "删除",
+    "start": "启动",
+    "stop": "停止",
+    "upload": "上传",
+    "download": "下载",
+    "convert": "转换",
+    "merge": "合并",
+    "import": "导入",
+    "login": "登录",
+    "logout": "退出登录",
+    "publish": "发布",
+    "retry": "重试",
+    "request": "请求",
+}
+
+TARGET_TYPE_CN: dict[str, str] = {
+    "fine_tune": "训练任务",
+    "eval": "评测任务",
+    "inference": "推理任务",
+    "model": "模型",
+    "trained_model": "训练产出模型",
+    "dataset": "数据集",
+    "dataset_version": "数据集版本",
+    "data_process_task": "数据处理任务",
+    "user": "用户",
+    "api": "接口",
+}
+
+
+def _build_cn_message(
+    module: str,
+    action: str,
+    target_type: str,
+    target_name: str | None,
+    target_id: str | None,
+    status: str,
+    username: str | None,
+    error_type: str,
+    error_message: str,
+) -> str:
+    """构建中文人类可读的日志消息，格式：[用户] 对 [模块] 执行了 [动作]，结果：成功/失败"""
+    user_part = f"用户[{username}]" if username else "系统"
+    module_cn = MODULE_CN.get(module, module)
+    action_cn = ACTION_CN.get(action, action)
+    target_cn = TARGET_TYPE_CN.get(target_type, target_type or "")
+    target_label = target_name or target_id or ""
+
+    # 拼接操作对象描述
+    if target_cn and target_label:
+        target_part = f"{target_cn}「{target_label}」"
+    elif target_cn:
+        target_part = target_cn
+    elif target_label:
+        target_part = f"「{target_label}」"
+    else:
+        target_part = ""
+
+    if status == OpStatus.SUCCESS:
+        result = "成功"
+        msg = f"{user_part} {action_cn}{module_cn}{target_part}，结果：成功"
+    else:
+        result = "失败"
+        err_brief = error_message[:120] if error_message else ""
+        err_part = f"（{error_type}: {err_brief}）" if error_type and err_brief else f"（{error_type}）" if error_type else ""
+        msg = f"{user_part} {action_cn}{module_cn}{target_part}，结果：失败{err_part}"
+
+    return msg
+
+
+def op_log(
+    module: str,
+    action: str,
+    target_type: str = "",
+    *,
+    target_name_param: str = "name",
+    detail_params: Optional[list[str]] = None,
+) -> Callable[[F], F]:
+    """
+    操作日志装饰器
+
+    自动记录：
+    - 谁在什么时间操作了什么
+    - 成功还是失败
+    - 失败时记录完整异常堆栈(traceback)、异常类型、异常消息
+    - 出错的函数名和文件位置，方便定位 bug
+    - 操作耗时(ms)
+    - 客户端 IP、请求路径
+
+    Args:
+        module: 业务模块（OpModule 常量）
+        action: 操作动作（OpAction 常量）
+        target_type: 资源类型
+        target_name_param: 从 kwargs 中提取目标名称的参数名
+        detail_params: 需要记录到 detail 的参数名列表
+    """
+    def decorator(func: F) -> F:
+        func_name = f"{func.__module__}.{func.__qualname__}"
+
+        if asyncio.iscoroutinefunction(func):
+            @functools.wraps(func)
+            async def async_wrapper(*args, **kwargs):
+                started_at = time.perf_counter()
+                trace_id = request_id_var.get("-")
+
+                user = _extract_user(args, kwargs)
+                request = _extract_request(args)
+
+                target_name = _get_param(kwargs, target_name_param, "")
+                target_id = _get_param(kwargs, "task_id", "") or _get_param(kwargs, "dataset_id", "") or _get_param(kwargs, "model_id", "")
+
+                detail_dict = _build_detail(detail_params, kwargs)
+                detail_str = json.dumps(detail_dict, ensure_ascii=False) if detail_dict else ""
+
+                try:
+                    result = await func(*args, **kwargs)
+                    elapsed_ms = (time.perf_counter() - started_at) * 1000
+
+                    if not target_id and isinstance(result, dict):
+                        target_id = str(result.get("id", ""))
+
+                    _write_log(
+                        module=module,
+                        action=action,
+                        target_type=target_type,
+                        target_id=str(target_id) if target_id else None,
+                        target_name=str(target_name) if target_name else None,
+                        status=OpStatus.SUCCESS,
+                        error_message="",
+                        error_type="",
+                        error_traceback="",
+                        func_name=func_name,
+                        detail=detail_str,
+                        user=user,
+                        request=request,
+                        trace_id=trace_id,
+                        duration_ms=elapsed_ms,
+                    )
+                    return result
+
+                except Exception as exc:
+                    elapsed_ms = (time.perf_counter() - started_at) * 1000
+
+                    # 捕获完整异常堆栈
+                    tb_lines = traceback.format_exception(type(exc), exc, exc.__traceback__)
+                    full_traceback = "".join(tb_lines)
+                    error_msg = str(exc)[:1000]
+                    error_type = type(exc).__name__
+
+                    _write_log(
+                        module=module,
+                        action=action,
+                        target_type=target_type,
+                        target_id=str(target_id) if target_id else None,
+                        target_name=str(target_name) if target_name else None,
+                        status=OpStatus.FAILURE,
+                        error_message=error_msg,
+                        error_type=error_type,
+                        error_traceback=full_traceback,
+                        func_name=func_name,
+                        detail=detail_str,
+                        user=user,
+                        request=request,
+                        trace_id=trace_id,
+                        duration_ms=elapsed_ms,
+                    )
+                    raise
+
+            return async_wrapper  # type: ignore
+        else:
+            @functools.wraps(func)
+            def sync_wrapper(*args, **kwargs):
+                started_at = time.perf_counter()
+                trace_id = request_id_var.get("-")
+
+                user = _extract_user(args, kwargs)
+                request = _extract_request(args)
+
+                target_name = _get_param(kwargs, target_name_param, "")
+                target_id = _get_param(kwargs, "task_id", "") or _get_param(kwargs, "dataset_id", "") or _get_param(kwargs, "model_id", "")
+
+                detail_dict = _build_detail(detail_params, kwargs)
+                detail_str = json.dumps(detail_dict, ensure_ascii=False) if detail_dict else ""
+
+                try:
+                    result = func(*args, **kwargs)
+                    elapsed_ms = (time.perf_counter() - started_at) * 1000
+
+                    if not target_id and isinstance(result, dict):
+                        target_id = str(result.get("id", ""))
+
+                    _write_log(
+                        module=module,
+                        action=action,
+                        target_type=target_type,
+                        target_id=str(target_id) if target_id else None,
+                        target_name=str(target_name) if target_name else None,
+                        status=OpStatus.SUCCESS,
+                        error_message="",
+                        error_type="",
+                        error_traceback="",
+                        func_name=func_name,
+                        detail=detail_str,
+                        user=user,
+                        request=request,
+                        trace_id=trace_id,
+                        duration_ms=elapsed_ms,
+                    )
+                    return result
+
+                except Exception as exc:
+                    elapsed_ms = (time.perf_counter() - started_at) * 1000
+
+                    tb_lines = traceback.format_exception(type(exc), exc, exc.__traceback__)
+                    full_traceback = "".join(tb_lines)
+                    error_msg = str(exc)[:1000]
+                    error_type = type(exc).__name__
+
+                    _write_log(
+                        module=module,
+                        action=action,
+                        target_type=target_type,
+                        target_id=str(target_id) if target_id else None,
+                        target_name=str(target_name) if target_name else None,
+                        status=OpStatus.FAILURE,
+                        error_message=error_msg,
+                        error_type=error_type,
+                        error_traceback=full_traceback,
+                        func_name=func_name,
+                        detail=detail_str,
+                        user=user,
+                        request=request,
+                        trace_id=trace_id,
+                        duration_ms=elapsed_ms,
+                    )
+                    raise
+
+            return sync_wrapper  # type: ignore
+
+    return decorator
+
+
+def log_operation(
+    *,
+    module: str,
+    action: str,
+    target_type: str = "",
+    target_id: str = "",
+    target_name: str = "",
+    status: str = OpStatus.SUCCESS,
+    error_message: str = "",
+    error_type: str = "",
+    error_traceback: str = "",
+    detail: str = "",
+    func_name: str = "",
+    user: Optional[dict] = None,
+    request: Optional[Request] = None,
+    duration_ms: float = 0,
+) -> None:
+    """手动记录操作日志（不方便用装饰器时使用）"""
+    trace_id = request_id_var.get("-")
+    _write_log(
+        module=module,
+        action=action,
+        target_type=target_type,
+        target_id=target_id or None,
+        target_name=target_name or None,
+        status=status,
+        error_message=error_message,
+        error_type=error_type,
+        error_traceback=error_traceback,
+        func_name=func_name,
+        detail=detail,
+        user=user,
+        request=request,
+        trace_id=trace_id,
+        duration_ms=duration_ms,
+    )
+
+
+def _build_detail(detail_params: Optional[list[str]], kwargs: dict) -> dict:
+    """从 kwargs 中提取需要记录的参数"""
+    detail_dict = {}
+    if detail_params:
+        for p in detail_params:
+            val = kwargs.get(p)
+            if val is not None:
+                detail_dict[p] = str(val)[:200]
+    return detail_dict
+
+
+def _extract_user(args: tuple, kwargs: dict) -> Optional[dict]:
+    """从函数参数中提取 current_user dict"""
+    for arg in args:
+        if isinstance(arg, dict) and "id" in arg and "username" in arg:
+            return arg
+    for v in kwargs.values():
+        if isinstance(v, dict) and "id" in v and "username" in v:
+            return v
+    return None
+
+
+def _extract_request(args: tuple) -> Optional[Request]:
+    """从函数参数中提取 Request 对象"""
+    for arg in args:
+        if isinstance(arg, Request):
+            return arg
+    return None
+
+
+def _get_param(kwargs: dict, key: str, default: str = "") -> str:
+    """安全获取参数值"""
+    val = kwargs.get(key, default)
+    if val is None:
+        return default
+    return str(val)
+
+
+def _write_log(
+    module: str,
+    action: str,
+    target_type: str,
+    target_id: Optional[str],
+    target_name: Optional[str],
+    status: str,
+    error_message: str,
+    error_type: str,
+    error_traceback: str,
+    func_name: str,
+    detail: str,
+    user: Optional[dict],
+    request: Optional[Request],
+    trace_id: str,
+    duration_ms: float,
+) -> None:
+    """写入操作日志到数据库 + 文件日志"""
+    user_id = user.get("id") if user else None
+    username = user.get("username") if user else None
+    client_ip = None
+    req_method = None
+    req_path = None
+    if request:
+        client_ip = request.client.host if request.client else None
+        req_method = request.method
+        req_path = request.url.path
+
+    # ---- 写文件日志（app-biz）----
+    cn_msg = _build_cn_message(
+        module=module, action=action, target_type=target_type,
+        target_name=target_name, target_id=target_id, status=status,
+        username=username, error_type=error_type, error_message=error_message,
+    )
+
+    log_fields = {
+        "bizModule": module,
+        "action": action,
+        "targetType": target_type or "",
+        "targetId": target_id or "",
+        "targetName": target_name or "",
+        "opStatus": status,
+        "durationMs": round(duration_ms, 2),
+        "username": username or "",
+    }
+    if req_method:
+        log_fields["requestMethod"] = req_method
+    if req_path:
+        log_fields["requestPath"] = req_path
+    if detail:
+        log_fields["detail"] = detail[:500]
+    if error_message:
+        log_fields["errorMessage"] = error_message[:500]
+    if error_type:
+        log_fields["errorType"] = error_type
+
+    if status == OpStatus.SUCCESS:
+        biz_logger.info(cn_msg, **log_fields)
+    elif status == OpStatus.FAILURE:
+        biz_logger.error(cn_msg, **log_fields)
+
+    # ---- 写数据库 ----
+    try:
+        store = get_platform_store()
+        log_id = new_id("op")
+        with store.connect() as conn:
+            conn.execute(
+                """
+                INSERT INTO operation_logs
+                (id, user_id, username, module, action, target_type, target_id,
+                 target_name, status, error_message, error_type, error_traceback,
+                 func_name, detail, client_ip,
+                 request_method, request_path, trace_id, duration_ms, create_time)
+                VALUES (?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?)
+                """,
+                (
+                    log_id, user_id, username, module, action,
+                    target_type or None, target_id, target_name,
+                    status,
+                    error_message[:1000] if error_message else None,
+                    error_type or None,
+                    error_traceback[:5000] if error_traceback else None,
+                    func_name or None,
+                    detail[:2000] if detail else None,
+                    client_ip, req_method, req_path, trace_id,
+                    round(duration_ms, 2), utcnow(),
+                ),
+            )
+    except Exception:
+        logger.error("写入操作日志到数据库失败 module=%s action=%s", module, action, exc_info=True)

backend/app/db/__init__.py

@@ -0,0 +1 @@
+"""Database infrastructure package."""

backend/app/db/session.py

@@ -0,0 +1,40 @@
+from __future__ import annotations
+
+import os
+from collections.abc import Generator
+from contextlib import contextmanager
+
+from sqlalchemy import create_engine
+from sqlalchemy.orm import Session, sessionmaker
+
+
+DATABASE_URL = os.getenv("DATABASE_URL", "postgresql+psycopg://yg_ft:change_me@localhost:15432/yg_ft")
+
+engine = create_engine(
+    DATABASE_URL,
+    pool_pre_ping=True,
+    future=True,
+)
+SessionLocal = sessionmaker(bind=engine, autoflush=False, autocommit=False, expire_on_commit=False, future=True)
+
+
+def get_db() -> Generator[Session, None, None]:
+    db = SessionLocal()
+    try:
+        yield db
+    finally:
+        db.close()
+
+
+@contextmanager
+def session_scope() -> Generator[Session, None, None]:
+    db = SessionLocal()
+    try:
+        yield db
+        db.commit()
+    except Exception:
+        db.rollback()
+        raise
+    finally:
+        db.close()
+

backend/app/db/sql/001_platform_runtime.sql

@@ -0,0 +1,373 @@
+CREATE TABLE IF NOT EXISTS users (
+    id TEXT PRIMARY KEY,
+    username TEXT NOT NULL UNIQUE,
+    password_hash TEXT NOT NULL,
+    display_name TEXT NOT NULL,
+    role TEXT NOT NULL,
+    status TEXT NOT NULL,
+    permissions TEXT NOT NULL,
+    create_time TEXT NOT NULL,
+    last_login TEXT,
+    protected INTEGER NOT NULL DEFAULT 0
+);
+
+CREATE TABLE IF NOT EXISTS models (
+    id TEXT PRIMARY KEY,
+    name TEXT NOT NULL UNIQUE,
+    type TEXT NOT NULL,
+    purpose TEXT NOT NULL,
+    model_source TEXT NOT NULL,
+    description TEXT,
+    path TEXT,
+    api_url TEXT,
+    api_key TEXT,
+    online_model_name TEXT,
+    create_time TEXT NOT NULL
+);
+
+CREATE TABLE IF NOT EXISTS trained_models (
+    id TEXT PRIMARY KEY,
+    name TEXT NOT NULL UNIQUE,
+    train_methods TEXT NOT NULL,
+    base_model_path TEXT,
+    create_time TEXT NOT NULL,
+    merged INTEGER NOT NULL DEFAULT 0,
+    merging INTEGER NOT NULL DEFAULT 0,
+    merged_path TEXT,
+    artifact_dir TEXT,
+    compute_node_id TEXT,
+    compute_node_name TEXT
+);
+
+CREATE TABLE IF NOT EXISTS model_lineage (
+    id TEXT PRIMARY KEY,
+    child_resource_type TEXT NOT NULL,
+    child_resource_id TEXT NOT NULL,
+    parent_resource_type TEXT NOT NULL,
+    parent_resource_id TEXT NOT NULL,
+    relation_type TEXT NOT NULL,
+    compute_job_id TEXT,
+    payload TEXT NOT NULL,
+    create_time TEXT NOT NULL
+);
+
+CREATE TABLE IF NOT EXISTS model_artifacts (
+    id TEXT PRIMARY KEY,
+    model_id TEXT NOT NULL,
+    model_kind TEXT NOT NULL,
+    artifact_type TEXT NOT NULL,
+    path TEXT NOT NULL,
+    size_bytes BIGINT NOT NULL DEFAULT 0,
+    checksum_sha256 TEXT,
+    metadata TEXT NOT NULL,
+    compute_job_id TEXT,
+    create_time TEXT NOT NULL
+);
+
+CREATE TABLE IF NOT EXISTS model_export_jobs (
+    id TEXT PRIMARY KEY,
+    trained_model_id TEXT,
+    compute_job_id TEXT NOT NULL,
+    node_id TEXT,
+    export_type TEXT NOT NULL,
+    quantization_bit INTEGER NOT NULL DEFAULT 0,
+    status TEXT NOT NULL,
+    output_dir TEXT,
+    payload TEXT NOT NULL,
+    create_time TEXT NOT NULL,
+    completed_at TEXT
+);
+
+CREATE TABLE IF NOT EXISTS datasets (
+    id TEXT PRIMARY KEY,
+    name TEXT NOT NULL UNIQUE,
+    type TEXT NOT NULL,
+    storage_type TEXT NOT NULL,
+    source TEXT NOT NULL,
+    task_id TEXT,
+    size TEXT,
+    count INTEGER NOT NULL DEFAULT 0,
+    description TEXT,
+    create_time TEXT NOT NULL
+);
+
+CREATE TABLE IF NOT EXISTS dataset_files (
+    id TEXT PRIMARY KEY,
+    dataset_id TEXT NOT NULL REFERENCES datasets(id) ON DELETE CASCADE,
+    name TEXT NOT NULL,
+    size TEXT,
+    content TEXT NOT NULL,
+    active_version_id TEXT NOT NULL,
+    versions TEXT NOT NULL,
+    create_time TEXT NOT NULL
+);
+
+CREATE TABLE IF NOT EXISTS compute_nodes (
+    id TEXT PRIMARY KEY,
+    code TEXT NOT NULL UNIQUE,
+    name TEXT NOT NULL,
+    api_base_url TEXT NOT NULL,
+    file_gateway_url TEXT NOT NULL,
+    enabled INTEGER NOT NULL DEFAULT 1,
+    scheduler_status TEXT NOT NULL,
+    scheduler_weight INTEGER NOT NULL DEFAULT 100,
+    tags TEXT NOT NULL,
+    gpu_count INTEGER NOT NULL DEFAULT 0,
+    current_running_jobs INTEGER NOT NULL DEFAULT 0,
+    max_parallel_jobs INTEGER NOT NULL DEFAULT 2,
+    data_root TEXT NOT NULL,
+    model_root TEXT NOT NULL,
+    log_root TEXT NOT NULL,
+    api_version TEXT NOT NULL DEFAULT 'v1',
+    capabilities TEXT NOT NULL DEFAULT '[]',
+    description TEXT,
+    last_health_check_at TEXT,
+    health_detail TEXT NOT NULL
+);
+
+CREATE TABLE IF NOT EXISTS gpus (
+    id TEXT PRIMARY KEY,
+    node_id TEXT NOT NULL REFERENCES compute_nodes(id) ON DELETE CASCADE,
+    gpu_index INTEGER NOT NULL,
+    uuid TEXT NOT NULL,
+    name TEXT NOT NULL,
+    memory_total_gb DOUBLE PRECISION NOT NULL,
+    power_limit_w DOUBLE PRECISION NOT NULL,
+    base_temperature INTEGER NOT NULL,
+    last_seen_at TEXT
+);
+
+CREATE TABLE IF NOT EXISTS fine_tune_tasks (
+    id TEXT PRIMARY KEY,
+    name TEXT NOT NULL UNIQUE,
+    payload TEXT NOT NULL,
+    status TEXT NOT NULL,
+    progress INTEGER NOT NULL DEFAULT 0,
+    process_id INTEGER,
+    create_time TEXT NOT NULL,
+    start_time TEXT,
+    completed_at TEXT,
+    compute_node_id TEXT REFERENCES compute_nodes(id) ON DELETE SET NULL,
+    gpus TEXT NOT NULL,
+    sync_job_id TEXT,
+    compute_job_id TEXT
+);
+
+CREATE TABLE IF NOT EXISTS fine_tune_metrics (
+    id TEXT PRIMARY KEY,
+    task_id TEXT NOT NULL REFERENCES fine_tune_tasks(id) ON DELETE CASCADE,
+    step INTEGER NOT NULL,
+    epoch DOUBLE PRECISION,
+    loss DOUBLE PRECISION,
+    grad_norm DOUBLE PRECISION,
+    learning_rate DOUBLE PRECISION,
+    raw TEXT NOT NULL,
+    create_time TEXT NOT NULL
+);
+
+CREATE TABLE IF NOT EXISTS fine_tune_checkpoints (
+    id TEXT PRIMARY KEY,
+    task_id TEXT NOT NULL REFERENCES fine_tune_tasks(id) ON DELETE CASCADE,
+    step INTEGER NOT NULL,
+    name TEXT NOT NULL,
+    path TEXT NOT NULL,
+    size_bytes BIGINT NOT NULL DEFAULT 0,
+    create_time TEXT NOT NULL
+);
+
+CREATE TABLE IF NOT EXISTS compute_jobs (
+    id TEXT PRIMARY KEY,
+    task_id TEXT REFERENCES fine_tune_tasks(id) ON DELETE SET NULL,
+    node_id TEXT REFERENCES compute_nodes(id) ON DELETE SET NULL,
+    engine TEXT NOT NULL,
+    status TEXT NOT NULL,
+    command TEXT NOT NULL,
+    output_dir TEXT,
+    log_file TEXT,
+    payload TEXT NOT NULL,
+    create_time TEXT NOT NULL,
+    update_time TEXT NOT NULL,
+    completed_at TEXT
+);
+
+CREATE TABLE IF NOT EXISTS gpu_allocations (
+    id TEXT PRIMARY KEY,
+    task_id TEXT REFERENCES fine_tune_tasks(id) ON DELETE CASCADE,
+    compute_job_id TEXT,
+    node_id TEXT REFERENCES compute_nodes(id) ON DELETE CASCADE,
+    gpu_index INTEGER NOT NULL,
+    status TEXT NOT NULL,
+    create_time TEXT NOT NULL,
+    released_at TEXT
+);
+
+CREATE TABLE IF NOT EXISTS scheduler_locks (
+    lock_key TEXT PRIMARY KEY,
+    owner TEXT NOT NULL,
+    expires_at TEXT NOT NULL,
+    create_time TEXT NOT NULL,
+    update_time TEXT NOT NULL
+);
+
+CREATE TABLE IF NOT EXISTS resource_replicas (
+    id TEXT PRIMARY KEY,
+    node_id TEXT NOT NULL REFERENCES compute_nodes(id) ON DELETE CASCADE,
+    resource_type TEXT NOT NULL,
+    resource_id TEXT NOT NULL,
+    local_path TEXT NOT NULL,
+    status TEXT NOT NULL,
+    sync_status TEXT NOT NULL,
+    checksum_sha256 TEXT,
+    byte_size BIGINT NOT NULL DEFAULT 0,
+    last_checked_at TEXT,
+    last_error TEXT,
+    create_time TEXT NOT NULL
+);
+
+CREATE TABLE IF NOT EXISTS resource_sync_jobs (
+    id TEXT PRIMARY KEY,
+    target_node_id TEXT NOT NULL,
+    resources TEXT NOT NULL,
+    status TEXT NOT NULL,
+    progress INTEGER NOT NULL DEFAULT 0,
+    create_time TEXT NOT NULL,
+    completed_at TEXT
+);
+
+CREATE TABLE IF NOT EXISTS storage_objects (
+    id TEXT PRIMARY KEY,
+    resource_type TEXT NOT NULL,
+    resource_id TEXT NOT NULL,
+    version_id TEXT NOT NULL,
+    bucket TEXT NOT NULL,
+    object_key TEXT NOT NULL,
+    file_name TEXT,
+    content_type TEXT,
+    checksum_sha256 TEXT,
+    byte_size BIGINT NOT NULL DEFAULT 0,
+    status TEXT NOT NULL DEFAULT 'pending',
+    created_by TEXT,
+    create_time TEXT NOT NULL,
+    UNIQUE (resource_type, resource_id, version_id, object_key)
+);
+
+CREATE TABLE IF NOT EXISTS storage_cache_jobs (
+    id TEXT PRIMARY KEY,
+    storage_object_id TEXT NOT NULL REFERENCES storage_objects(id) ON DELETE CASCADE,
+    node_id TEXT NOT NULL REFERENCES compute_nodes(id) ON DELETE CASCADE,
+    direction TEXT NOT NULL,
+    status TEXT NOT NULL,
+    progress INTEGER NOT NULL DEFAULT 0,
+    local_path TEXT,
+    error TEXT,
+    create_time TEXT NOT NULL,
+    completed_at TEXT
+);
+
+CREATE INDEX IF NOT EXISTS idx_storage_objects_resource ON storage_objects(resource_type, resource_id, version_id);
+CREATE INDEX IF NOT EXISTS idx_storage_cache_jobs_node_status ON storage_cache_jobs(node_id, status);
+
+CREATE TABLE IF NOT EXISTS eval_tasks (
+    id TEXT PRIMARY KEY,
+    name TEXT NOT NULL,
+    payload TEXT NOT NULL,
+    status TEXT NOT NULL,
+    create_time TEXT NOT NULL
+);
+
+CREATE TABLE IF NOT EXISTS eval_dimensions (
+    id TEXT PRIMARY KEY,
+    name TEXT NOT NULL,
+    payload TEXT NOT NULL,
+    is_active INTEGER NOT NULL DEFAULT 1,
+    is_default INTEGER NOT NULL DEFAULT 0,
+    create_time TEXT NOT NULL
+);
+
+CREATE TABLE IF NOT EXISTS compare_tasks (
+    id TEXT PRIMARY KEY,
+    name TEXT NOT NULL,
+    payload TEXT NOT NULL,
+    status TEXT NOT NULL,
+    create_time TEXT NOT NULL
+);
+
+CREATE INDEX IF NOT EXISTS idx_fine_tune_status ON fine_tune_tasks(status);
+CREATE INDEX IF NOT EXISTS idx_fine_tune_compute_job ON fine_tune_tasks(compute_job_id);
+CREATE INDEX IF NOT EXISTS idx_fine_tune_compute_node_status ON fine_tune_tasks(compute_node_id, status);
+CREATE INDEX IF NOT EXISTS idx_model_lineage_child ON model_lineage(child_resource_type, child_resource_id);
+CREATE INDEX IF NOT EXISTS idx_model_lineage_parent ON model_lineage(parent_resource_type, parent_resource_id);
+CREATE INDEX IF NOT EXISTS idx_model_artifacts_model ON model_artifacts(model_kind, model_id, artifact_type);
+CREATE INDEX IF NOT EXISTS idx_model_export_jobs_model ON model_export_jobs(trained_model_id, create_time DESC);
+CREATE INDEX IF NOT EXISTS idx_model_export_jobs_compute ON model_export_jobs(compute_job_id);
+CREATE INDEX IF NOT EXISTS idx_fine_tune_metrics_task_step ON fine_tune_metrics(task_id, step);
+CREATE UNIQUE INDEX IF NOT EXISTS uq_fine_tune_metrics_task_step_epoch ON fine_tune_metrics(task_id, step, epoch);
+CREATE INDEX IF NOT EXISTS idx_fine_tune_checkpoints_task_step ON fine_tune_checkpoints(task_id, step);
+CREATE UNIQUE INDEX IF NOT EXISTS uq_fine_tune_checkpoints_task_path ON fine_tune_checkpoints(task_id, path);
+CREATE INDEX IF NOT EXISTS idx_compute_jobs_task ON compute_jobs(task_id);
+CREATE INDEX IF NOT EXISTS idx_compute_jobs_node_status ON compute_jobs(node_id, status);
+CREATE INDEX IF NOT EXISTS idx_gpu_allocations_node_status ON gpu_allocations(node_id, status);
+CREATE UNIQUE INDEX IF NOT EXISTS uq_gpu_allocations_active ON gpu_allocations(node_id, gpu_index) WHERE status IN ('allocated','running');
+CREATE INDEX IF NOT EXISTS idx_scheduler_locks_expires ON scheduler_locks(expires_at);
+CREATE INDEX IF NOT EXISTS idx_dataset_files_dataset ON dataset_files(dataset_id);
+CREATE INDEX IF NOT EXISTS idx_gpus_node ON gpus(node_id);
+CREATE UNIQUE INDEX IF NOT EXISTS uq_gpus_node_index ON gpus(node_id, gpu_index);
+CREATE INDEX IF NOT EXISTS idx_replicas_resource ON resource_replicas(resource_type, resource_id);
+CREATE UNIQUE INDEX IF NOT EXISTS uq_replicas_node_resource ON resource_replicas(node_id, resource_type, resource_id);
+CREATE INDEX IF NOT EXISTS idx_sync_jobs_node_status ON resource_sync_jobs(target_node_id, status);
+CREATE INDEX IF NOT EXISTS idx_eval_tasks_status ON eval_tasks(status);
+CREATE INDEX IF NOT EXISTS idx_eval_dimensions_active ON eval_dimensions(is_active);
+CREATE INDEX IF NOT EXISTS idx_compare_tasks_status ON compare_tasks(status);
+
+-- ===================== Project / Tenant =====================
+
+CREATE TABLE IF NOT EXISTS projects (
+    id TEXT PRIMARY KEY,
+    tenant_id TEXT NOT NULL DEFAULT 'default',
+    name TEXT NOT NULL,
+    code TEXT NOT NULL,
+    description TEXT,
+    quota TEXT,
+    status TEXT NOT NULL DEFAULT 'active',
+    create_time TEXT NOT NULL,
+    create_by TEXT,
+    updated_at TEXT
+);
+
+CREATE TABLE IF NOT EXISTS project_members (
+    project_id TEXT NOT NULL REFERENCES projects(id) ON DELETE CASCADE,
+    user_id TEXT NOT NULL REFERENCES users(id) ON DELETE CASCADE,
+    role TEXT NOT NULL DEFAULT 'member',
+    create_time TEXT NOT NULL,
+    PRIMARY KEY (project_id, user_id)
+);
+
+CREATE TABLE IF NOT EXISTS roles (
+    id TEXT PRIMARY KEY,
+    name TEXT NOT NULL,
+    permissions TEXT NOT NULL DEFAULT '[]',
+    create_time TEXT
+);
+
+CREATE TABLE IF NOT EXISTS sessions (
+    id TEXT PRIMARY KEY,
+    user_id TEXT NOT NULL,
+    username TEXT,
+    login_at TEXT,
+    logout_at TEXT,
+    duration_seconds INTEGER,
+    issued_at TEXT,
+    expires_at TEXT,
+    ip TEXT,
+    create_time TEXT
+);
+
+CREATE TABLE IF NOT EXISTS acls (
+    id TEXT PRIMARY KEY,
+    resource_type TEXT NOT NULL,
+    resource_id TEXT NOT NULL,
+    principal_type TEXT NOT NULL,
+    principal_id TEXT NOT NULL,
+    permission TEXT NOT NULL,
+    create_time TEXT
+);

backend/app/db/sql/002_data_process.sql

@@ -0,0 +1,352 @@
+-- Data processing migration.
+--
+-- IMPORTANT: This file is intentionally NOT wired into application startup.
+-- Apply it explicitly in a controlled deployment, or call
+-- DataProcessStore.ensure_schema() from an administrative command.
+
+BEGIN;
+
+-- This migration targets the current runtime schema created by
+-- 001_platform_runtime.sql. Refuse the UUID/JSONB target-design schema instead
+-- of partially altering it with incompatible TEXT foreign keys.
+DO $$
+DECLARE
+    datasets_id_type TEXT;
+BEGIN
+    SELECT format_type(a.atttypid, a.atttypmod)
+      INTO datasets_id_type
+      FROM pg_attribute a
+      JOIN pg_class c ON c.oid = a.attrelid
+      JOIN pg_namespace n ON n.oid = c.relnamespace
+     WHERE n.nspname = current_schema()
+       AND c.relname = 'datasets'
+       AND a.attname = 'id'
+       AND a.attnum > 0
+       AND NOT a.attisdropped;
+    IF datasets_id_type IS NULL THEN
+        RAISE EXCEPTION '002_data_process.sql requires 001_platform_runtime.sql first';
+    END IF;
+    IF datasets_id_type <> 'text' THEN
+        RAISE EXCEPTION
+          '002_data_process.sql supports only the current TEXT runtime schema; found datasets.id type %',
+          datasets_id_type;
+    END IF;
+END $$;
+
+ALTER TABLE datasets ADD COLUMN IF NOT EXISTS source_task_id TEXT;
+ALTER TABLE datasets ADD COLUMN IF NOT EXISTS size_bytes BIGINT NOT NULL DEFAULT 0;
+ALTER TABLE datasets ADD COLUMN IF NOT EXISTS record_count BIGINT NOT NULL DEFAULT 0;
+ALTER TABLE datasets ADD COLUMN IF NOT EXISTS metadata TEXT NOT NULL DEFAULT '{}';
+ALTER TABLE datasets ADD COLUMN IF NOT EXISTS tenant_id TEXT;
+ALTER TABLE datasets ADD COLUMN IF NOT EXISTS project_id TEXT;
+ALTER TABLE datasets ADD COLUMN IF NOT EXISTS owner_id TEXT;
+ALTER TABLE datasets ADD COLUMN IF NOT EXISTS created_by TEXT;
+ALTER TABLE datasets ADD COLUMN IF NOT EXISTS created_at TIMESTAMPTZ NOT NULL DEFAULT now();
+ALTER TABLE datasets ADD COLUMN IF NOT EXISTS updated_at TIMESTAMPTZ NOT NULL DEFAULT now();
+ALTER TABLE datasets ADD COLUMN IF NOT EXISTS deleted_at TIMESTAMPTZ;
+
+ALTER TABLE dataset_files ADD COLUMN IF NOT EXISTS storage_object_id TEXT;
+ALTER TABLE dataset_files ADD COLUMN IF NOT EXISTS current_version_id TEXT;
+ALTER TABLE dataset_files ADD COLUMN IF NOT EXISTS size_bytes BIGINT NOT NULL DEFAULT 0;
+ALTER TABLE dataset_files ADD COLUMN IF NOT EXISTS record_count BIGINT NOT NULL DEFAULT 0;
+ALTER TABLE dataset_files ADD COLUMN IF NOT EXISTS file_format VARCHAR(40);
+ALTER TABLE dataset_files ADD COLUMN IF NOT EXISTS checksum_sha256 CHAR(64);
+ALTER TABLE dataset_files ADD COLUMN IF NOT EXISTS version_no INTEGER NOT NULL DEFAULT 1;
+ALTER TABLE dataset_files ADD COLUMN IF NOT EXISTS source_task_id TEXT;
+ALTER TABLE dataset_files ADD COLUMN IF NOT EXISTS tenant_id TEXT;
+ALTER TABLE dataset_files ADD COLUMN IF NOT EXISTS project_id TEXT;
+ALTER TABLE dataset_files ADD COLUMN IF NOT EXISTS created_by TEXT;
+ALTER TABLE dataset_files ADD COLUMN IF NOT EXISTS metadata TEXT NOT NULL DEFAULT '{}';
+ALTER TABLE dataset_files ADD COLUMN IF NOT EXISTS created_at TIMESTAMPTZ NOT NULL DEFAULT now();
+ALTER TABLE dataset_files ADD COLUMN IF NOT EXISTS updated_at TIMESTAMPTZ NOT NULL DEFAULT now();
+ALTER TABLE dataset_files ADD COLUMN IF NOT EXISTS deleted_at TIMESTAMPTZ;
+
+CREATE TABLE IF NOT EXISTS data_process_tasks (
+    id TEXT PRIMARY KEY,
+    name VARCHAR(150) NOT NULL,
+    description TEXT,
+    status VARCHAR(20) NOT NULL DEFAULT 'pending'
+        CHECK (status IN ('pending', 'running', 'completed', 'failed', 'stopped')),
+    process_type VARCHAR(20) NOT NULL
+        CHECK (process_type IN ('structured', 'unstructured', 'external')),
+    source_dataset_id TEXT REFERENCES datasets(id) ON DELETE SET NULL,
+    output_dataset_id TEXT REFERENCES datasets(id) ON DELETE SET NULL,
+    config TEXT NOT NULL DEFAULT '{}',
+    progress NUMERIC(5,2) NOT NULL DEFAULT 0 CHECK (progress >= 0 AND progress <= 100),
+    input_count BIGINT NOT NULL DEFAULT 0 CHECK (input_count >= 0),
+    output_count BIGINT NOT NULL DEFAULT 0 CHECK (output_count >= 0),
+    filtered_count BIGINT NOT NULL DEFAULT 0 CHECK (filtered_count >= 0),
+    duplicate_count BIGINT NOT NULL DEFAULT 0 CHECK (duplicate_count >= 0),
+    error_count BIGINT NOT NULL DEFAULT 0 CHECK (error_count >= 0),
+    failure_reason TEXT,
+    generation_run_id TEXT,
+    results_confirmed BOOLEAN NOT NULL DEFAULT TRUE,
+    workflow_step VARCHAR(20) NOT NULL DEFAULT 'create'
+        CHECK (workflow_step IN ('create', 'model', 'upload', 'preview', 'generate', 'results')),
+    preview_status VARCHAR(20) NOT NULL DEFAULT 'idle'
+        CHECK (preview_status IN ('idle', 'queued', 'running', 'completed', 'failed', 'cancelled')),
+    preview_progress NUMERIC(5,2) NOT NULL DEFAULT 0
+        CHECK (preview_progress >= 0 AND preview_progress <= 100),
+    preview_run_id TEXT,
+    preview_failure_reason TEXT,
+    preview_total_files INTEGER NOT NULL DEFAULT 0 CHECK (preview_total_files >= 0),
+    preview_completed_files INTEGER NOT NULL DEFAULT 0 CHECK (preview_completed_files >= 0),
+    tenant_id TEXT,
+    project_id TEXT,
+    owner_id TEXT,
+    approval_status VARCHAR(30) NOT NULL DEFAULT 'not_required',
+    created_by TEXT,
+    updated_by TEXT,
+    deleted_by TEXT,
+    started_at TIMESTAMPTZ,
+    completed_at TIMESTAMPTZ,
+    created_at TIMESTAMPTZ NOT NULL DEFAULT now(),
+    updated_at TIMESTAMPTZ NOT NULL DEFAULT now(),
+    deleted_at TIMESTAMPTZ
+);
+
+ALTER TABLE data_process_tasks ADD COLUMN IF NOT EXISTS generation_run_id TEXT;
+-- 历史任务在引入六步确认流程前已经完成审核，默认保留为已确认；
+-- 新任务由创建接口显式写入 FALSE，并在第六步确认后转为 TRUE。
+ALTER TABLE data_process_tasks
+    ADD COLUMN IF NOT EXISTS results_confirmed BOOLEAN NOT NULL DEFAULT TRUE;
+UPDATE data_process_tasks
+SET results_confirmed=FALSE
+WHERE status <> 'completed' AND results_confirmed=TRUE;
+
+-- 先以可空列接入旧库，才能只回填历史行；随后再收紧默认值与约束。
+ALTER TABLE data_process_tasks ADD COLUMN IF NOT EXISTS workflow_step VARCHAR(20);
+ALTER TABLE data_process_tasks ADD COLUMN IF NOT EXISTS preview_status VARCHAR(20);
+ALTER TABLE data_process_tasks ADD COLUMN IF NOT EXISTS preview_progress NUMERIC(5,2);
+ALTER TABLE data_process_tasks ADD COLUMN IF NOT EXISTS preview_run_id TEXT;
+ALTER TABLE data_process_tasks ADD COLUMN IF NOT EXISTS preview_failure_reason TEXT;
+ALTER TABLE data_process_tasks ADD COLUMN IF NOT EXISTS preview_total_files INTEGER;
+ALTER TABLE data_process_tasks ADD COLUMN IF NOT EXISTS preview_completed_files INTEGER;
+
+CREATE TEMP TABLE data_process_workflow_backfill_ids ON COMMIT DROP AS
+SELECT id FROM data_process_tasks WHERE workflow_step IS NULL;
+
+UPDATE data_process_tasks task
+SET workflow_step = CASE
+    WHEN task.status IN ('running', 'failed', 'stopped') THEN 'generate'
+    WHEN task.status = 'completed' AND task.results_confirmed=FALSE THEN 'generate'
+    WHEN task.status = 'completed' THEN 'results'
+    ELSE 'create'
+END
+WHERE task.workflow_step IS NULL;
+UPDATE data_process_tasks
+SET preview_status='idle', preview_progress=0,
+    preview_total_files=0, preview_completed_files=0
+WHERE preview_status IS NULL OR preview_progress IS NULL
+   OR preview_total_files IS NULL OR preview_completed_files IS NULL;
+
+ALTER TABLE data_process_tasks ALTER COLUMN workflow_step SET DEFAULT 'create';
+ALTER TABLE data_process_tasks ALTER COLUMN workflow_step SET NOT NULL;
+ALTER TABLE data_process_tasks ALTER COLUMN preview_status SET DEFAULT 'idle';
+ALTER TABLE data_process_tasks ALTER COLUMN preview_status SET NOT NULL;
+ALTER TABLE data_process_tasks ALTER COLUMN preview_progress SET DEFAULT 0;
+ALTER TABLE data_process_tasks ALTER COLUMN preview_progress SET NOT NULL;
+ALTER TABLE data_process_tasks ALTER COLUMN preview_total_files SET DEFAULT 0;
+ALTER TABLE data_process_tasks ALTER COLUMN preview_total_files SET NOT NULL;
+ALTER TABLE data_process_tasks ALTER COLUMN preview_completed_files SET DEFAULT 0;
+ALTER TABLE data_process_tasks ALTER COLUMN preview_completed_files SET NOT NULL;
+
+DO $$
+BEGIN
+    IF NOT EXISTS (
+        SELECT 1 FROM pg_constraint
+        WHERE conrelid='data_process_tasks'::regclass
+          AND conname='ck_data_process_tasks_workflow_step'
+    ) THEN
+        ALTER TABLE data_process_tasks ADD CONSTRAINT ck_data_process_tasks_workflow_step
+            CHECK (workflow_step IN ('create', 'model', 'upload', 'preview', 'generate', 'results'));
+    END IF;
+    IF NOT EXISTS (
+        SELECT 1 FROM pg_constraint
+        WHERE conrelid='data_process_tasks'::regclass
+          AND conname='ck_data_process_tasks_preview_status'
+    ) THEN
+        ALTER TABLE data_process_tasks ADD CONSTRAINT ck_data_process_tasks_preview_status
+            CHECK (preview_status IN ('idle', 'queued', 'running', 'completed', 'failed', 'cancelled'));
+    END IF;
+    IF NOT EXISTS (
+        SELECT 1 FROM pg_constraint
+        WHERE conrelid='data_process_tasks'::regclass
+          AND conname='ck_data_process_tasks_preview_progress'
+    ) THEN
+        ALTER TABLE data_process_tasks ADD CONSTRAINT ck_data_process_tasks_preview_progress
+            CHECK (preview_progress >= 0 AND preview_progress <= 100);
+    END IF;
+    IF NOT EXISTS (
+        SELECT 1 FROM pg_constraint
+        WHERE conrelid='data_process_tasks'::regclass
+          AND conname='ck_data_process_tasks_preview_file_counts'
+    ) THEN
+        ALTER TABLE data_process_tasks ADD CONSTRAINT ck_data_process_tasks_preview_file_counts
+            CHECK (preview_total_files >= 0 AND preview_completed_files >= 0
+                   AND preview_completed_files <= preview_total_files);
+    END IF;
+END $$;
+
+CREATE UNIQUE INDEX IF NOT EXISTS uq_data_process_tasks_name_alive
+    ON data_process_tasks(name) WHERE deleted_at IS NULL;
+CREATE INDEX IF NOT EXISTS idx_data_process_tasks_scope_status
+    ON data_process_tasks(tenant_id, project_id, status, created_at DESC)
+    WHERE deleted_at IS NULL;
+CREATE INDEX IF NOT EXISTS idx_data_process_tasks_creator_created
+    ON data_process_tasks(created_by, created_at DESC) WHERE deleted_at IS NULL;
+
+CREATE TABLE IF NOT EXISTS data_process_source_files (
+    id TEXT PRIMARY KEY,
+    task_id TEXT NOT NULL REFERENCES data_process_tasks(id) ON DELETE CASCADE,
+    storage_object_id TEXT,
+    name TEXT NOT NULL,
+    size_bytes BIGINT NOT NULL DEFAULT 0 CHECK (size_bytes >= 0),
+    record_count BIGINT NOT NULL DEFAULT 0 CHECK (record_count >= 0),
+    file_format VARCHAR(40),
+    checksum_sha256 CHAR(64) NOT NULL,
+    version_no INTEGER NOT NULL DEFAULT 1 CHECK (version_no > 0),
+    content TEXT NOT NULL,
+    content_preview TEXT,
+    metadata TEXT NOT NULL DEFAULT '{}',
+    tenant_id TEXT,
+    project_id TEXT,
+    created_by TEXT,
+    created_at TIMESTAMPTZ NOT NULL DEFAULT now(),
+    updated_at TIMESTAMPTZ NOT NULL DEFAULT now(),
+    deleted_at TIMESTAMPTZ
+);
+
+CREATE INDEX IF NOT EXISTS idx_data_process_source_files_task
+    ON data_process_source_files(task_id, created_at) WHERE deleted_at IS NULL;
+CREATE UNIQUE INDEX IF NOT EXISTS uq_data_process_source_checksum_alive
+    ON data_process_source_files(task_id, checksum_sha256) WHERE deleted_at IS NULL;
+
+CREATE TABLE IF NOT EXISTS data_process_preview_items (
+    id TEXT PRIMARY KEY,
+    task_id TEXT NOT NULL REFERENCES data_process_tasks(id) ON DELETE CASCADE,
+    source_file_id TEXT REFERENCES data_process_source_files(id) ON DELETE CASCADE,
+    original_content TEXT NOT NULL DEFAULT '',
+    edited_content TEXT NOT NULL DEFAULT '',
+    source_start INTEGER CHECK (source_start IS NULL OR source_start >= 0),
+    source_end INTEGER CHECK (source_end IS NULL OR source_end >= 0),
+    source_start_line INTEGER CHECK (source_start_line IS NULL OR source_start_line > 0),
+    source_end_line INTEGER CHECK (source_end_line IS NULL OR source_end_line > 0),
+    token_count INTEGER NOT NULL DEFAULT 0 CHECK (token_count >= 0),
+    status VARCHAR(20) NOT NULL DEFAULT 'original'
+        CHECK (status IN ('original', 'modified', 'manual', 'invalid')),
+    quality_score TEXT NOT NULL DEFAULT '{}',
+    created_at TIMESTAMPTZ NOT NULL DEFAULT now(),
+    updated_at TIMESTAMPTZ NOT NULL DEFAULT now(),
+    CHECK (source_start IS NULL OR source_end IS NULL OR source_end >= source_start),
+    CHECK (source_start_line IS NULL OR source_end_line IS NULL OR source_end_line >= source_start_line)
+);
+
+CREATE INDEX IF NOT EXISTS idx_data_process_preview_task_file
+    ON data_process_preview_items(task_id, source_file_id, created_at);
+
+-- 子表在新库中到这里才存在；只修复本次新增 workflow_step 前的历史任务。
+UPDATE data_process_tasks task
+SET workflow_step = CASE
+    WHEN EXISTS (
+        SELECT 1 FROM data_process_preview_items preview
+        WHERE preview.task_id=task.id
+    ) THEN 'preview'
+    WHEN EXISTS (
+        SELECT 1 FROM data_process_source_files source_file
+        WHERE source_file.task_id=task.id AND source_file.deleted_at IS NULL
+    ) THEN 'upload'
+    ELSE task.workflow_step
+END
+WHERE task.id IN (SELECT id FROM data_process_workflow_backfill_ids)
+  AND task.status='pending';
+
+CREATE TABLE IF NOT EXISTS data_process_results (
+    id TEXT PRIMARY KEY,
+    task_id TEXT NOT NULL REFERENCES data_process_tasks(id) ON DELETE CASCADE,
+    preview_item_id TEXT REFERENCES data_process_preview_items(id) ON DELETE SET NULL,
+    instruction TEXT NOT NULL,
+    input TEXT NOT NULL DEFAULT '',
+    output TEXT NOT NULL,
+    chosen TEXT NOT NULL DEFAULT '',
+    rejected TEXT NOT NULL DEFAULT '',
+    original_instruction TEXT,
+    original_input TEXT,
+    original_output TEXT,
+    original_chosen TEXT,
+    original_rejected TEXT,
+    status VARCHAR(20) NOT NULL DEFAULT 'valid'
+        CHECK (status IN ('valid', 'modified', 'invalid')),
+    error TEXT,
+    split VARCHAR(20) CHECK (split IS NULL OR split IN ('train', 'validation', 'test')),
+    quality_score TEXT NOT NULL DEFAULT '{}',
+    created_at TIMESTAMPTZ NOT NULL DEFAULT now(),
+    updated_at TIMESTAMPTZ NOT NULL DEFAULT now()
+);
+
+ALTER TABLE data_process_results ADD COLUMN IF NOT EXISTS chosen TEXT NOT NULL DEFAULT '';
+ALTER TABLE data_process_results ADD COLUMN IF NOT EXISTS rejected TEXT NOT NULL DEFAULT '';
+ALTER TABLE data_process_results ADD COLUMN IF NOT EXISTS original_chosen TEXT;
+ALTER TABLE data_process_results ADD COLUMN IF NOT EXISTS original_rejected TEXT;
+
+CREATE INDEX IF NOT EXISTS idx_data_process_results_task_status
+    ON data_process_results(task_id, status, id);
+CREATE INDEX IF NOT EXISTS idx_data_process_results_task_split
+    ON data_process_results(task_id, split);
+
+CREATE TABLE IF NOT EXISTS dataset_file_versions (
+    id TEXT PRIMARY KEY,
+    dataset_file_id TEXT NOT NULL REFERENCES dataset_files(id) ON DELETE CASCADE,
+    version_no INTEGER NOT NULL CHECK (version_no > 0),
+    storage_object_id TEXT NOT NULL,
+    content_preview TEXT,
+    description TEXT,
+    base_version_id TEXT REFERENCES dataset_file_versions(id) ON DELETE SET NULL,
+    size_bytes BIGINT NOT NULL DEFAULT 0 CHECK (size_bytes >= 0),
+    record_count BIGINT NOT NULL DEFAULT 0 CHECK (record_count >= 0),
+    checksum_sha256 CHAR(64) NOT NULL,
+    source_task_id TEXT REFERENCES data_process_tasks(id) ON DELETE SET NULL,
+    metadata TEXT NOT NULL DEFAULT '{}',
+    created_by TEXT,
+    created_at TIMESTAMPTZ NOT NULL DEFAULT now()
+);
+
+ALTER TABLE dataset_file_versions ADD COLUMN IF NOT EXISTS source_task_id TEXT;
+ALTER TABLE dataset_file_versions ADD COLUMN IF NOT EXISTS metadata TEXT NOT NULL DEFAULT '{}';
+CREATE UNIQUE INDEX IF NOT EXISTS uq_dataset_file_versions_no_002
+    ON dataset_file_versions(dataset_file_id, version_no);
+CREATE INDEX IF NOT EXISTS idx_dataset_file_versions_source_task_002
+    ON dataset_file_versions(source_task_id) WHERE source_task_id IS NOT NULL;
+
+CREATE TABLE IF NOT EXISTS dataset_records (
+    id TEXT PRIMARY KEY,
+    dataset_id TEXT NOT NULL REFERENCES datasets(id) ON DELETE CASCADE,
+    dataset_file_id TEXT REFERENCES dataset_files(id) ON DELETE CASCADE,
+    version_id TEXT REFERENCES dataset_file_versions(id) ON DELETE CASCADE,
+    line_no INTEGER,
+    split VARCHAR(20) CHECK (split IS NULL OR split IN ('train', 'validation', 'test')),
+    instruction TEXT,
+    input TEXT,
+    output TEXT,
+    raw TEXT NOT NULL DEFAULT '{}',
+    status VARCHAR(20) NOT NULL DEFAULT 'valid'
+        CHECK (status IN ('valid', 'modified', 'invalid')),
+    source_task_id TEXT REFERENCES data_process_tasks(id) ON DELETE SET NULL,
+    source_result_id TEXT REFERENCES data_process_results(id) ON DELETE SET NULL,
+    preview_item_id TEXT REFERENCES data_process_preview_items(id) ON DELETE SET NULL,
+    created_at TIMESTAMPTZ NOT NULL DEFAULT now()
+);
+
+ALTER TABLE dataset_records ADD COLUMN IF NOT EXISTS source_task_id TEXT;
+ALTER TABLE dataset_records ADD COLUMN IF NOT EXISTS source_result_id TEXT;
+ALTER TABLE dataset_records ADD COLUMN IF NOT EXISTS preview_item_id TEXT;
+CREATE INDEX IF NOT EXISTS idx_dataset_records_dataset_002
+    ON dataset_records(dataset_id, id);
+CREATE INDEX IF NOT EXISTS idx_dataset_records_source_task_002
+    ON dataset_records(source_task_id, source_result_id);
+CREATE INDEX IF NOT EXISTS idx_datasets_source_task_002
+    ON datasets(source_task_id) WHERE source_task_id IS NOT NULL;
+CREATE INDEX IF NOT EXISTS idx_dataset_files_source_task_002
+    ON dataset_files(source_task_id) WHERE source_task_id IS NOT NULL;
+
+COMMIT;

backend/app/db/sql/002_governance.sql

@@ -0,0 +1,111 @@
+-- 平台治理：租户 / 审批 / 审计（字段以 platform_store 实际写入为准）
+CREATE TABLE IF NOT EXISTS tenants (
+    id TEXT PRIMARY KEY,
+    name TEXT NOT NULL,
+    code TEXT,
+    status TEXT DEFAULT 'active',
+    owner_user_id TEXT,
+    quota TEXT,
+    retention_policy_id TEXT,
+    create_time TEXT
+);
+
+CREATE TABLE IF NOT EXISTS approval_templates (
+    id TEXT PRIMARY KEY,
+    name TEXT NOT NULL,
+    steps TEXT,
+    create_time TEXT
+);
+
+CREATE TABLE IF NOT EXISTS approval_instances (
+    id TEXT PRIMARY KEY,
+    template_id TEXT,
+    resource_type TEXT,
+    resource_id TEXT,
+    applicant_id TEXT,
+    status TEXT DEFAULT 'pending',
+    current_step INTEGER DEFAULT 0,
+    create_time TEXT
+);
+
+CREATE TABLE IF NOT EXISTS approval_steps (
+    id TEXT PRIMARY KEY,
+    instance_id TEXT,
+    step_index INTEGER,
+    approver_id TEXT,
+    status TEXT DEFAULT 'pending',
+    comment TEXT,
+    time TEXT
+);
+
+CREATE TABLE IF NOT EXISTS audit_logs (
+    id TEXT PRIMARY KEY,
+    tenant_id TEXT,
+    project_id TEXT,
+    actor_id TEXT,
+    action TEXT,
+    target_type TEXT,
+    target_id TEXT,
+    detail TEXT,
+    client_ip TEXT,
+    time TEXT
+);
+
+-- 幂等升级 audit_logs 表：新增字段（已存在则跳过）
+ALTER TABLE audit_logs ADD COLUMN IF NOT EXISTS trace_id TEXT;
+ALTER TABLE audit_logs ADD COLUMN IF NOT EXISTS request_method TEXT;
+ALTER TABLE audit_logs ADD COLUMN IF NOT EXISTS request_path TEXT;
+ALTER TABLE audit_logs ADD COLUMN IF NOT EXISTS status_code INTEGER;
+ALTER TABLE audit_logs ADD COLUMN IF NOT EXISTS duration_ms REAL;
+ALTER TABLE audit_logs ADD COLUMN IF NOT EXISTS extra JSONB;
+
+-- 索引（已存在则跳过）
+CREATE INDEX IF NOT EXISTS idx_audit_trace ON audit_logs(trace_id);
+CREATE INDEX IF NOT EXISTS idx_audit_actor_time ON audit_logs(actor_id, time);
+CREATE INDEX IF NOT EXISTS idx_audit_target ON audit_logs(target_type, target_id);
+
+CREATE TABLE IF NOT EXISTS retention_policies (
+    id TEXT PRIMARY KEY,
+    name TEXT NOT NULL,
+    scope TEXT,
+    rule TEXT,
+    status TEXT DEFAULT 'active',
+    create_time TEXT,
+    create_by TEXT,
+    updated_at TEXT
+);
+
+-- ===================== 操作日志表 =====================
+-- 记录用户在每个业务模块的详细操作（成功/失败、报错信息等）
+CREATE TABLE IF NOT EXISTS operation_logs (
+    id TEXT PRIMARY KEY,
+    user_id TEXT,               -- 操作用户 ID
+    username TEXT,              -- 操作用户名（冗余，便于查询）
+    module TEXT,                -- 业务模块：fine-tune/model-eval/model-inference/dataset/data-process/data-convert/model-manage
+    action TEXT,                -- 具体动作：create/start/stop/delete/upload/convert 等
+    target_type TEXT,           -- 资源类型
+    target_id TEXT,             -- 资源 ID
+    target_name TEXT,           -- 资源名称（便于阅读）
+    status TEXT NOT NULL,       -- success / failure
+    error_message TEXT,         -- 失败时的报错信息
+    detail TEXT,                -- 操作详情 JSON（参数摘要）
+    client_ip TEXT,             -- 客户端 IP
+    request_method TEXT,        -- HTTP 方法
+    request_path TEXT,          -- 请求路径
+    trace_id TEXT,              -- 链路追踪 ID
+    duration_ms REAL,           -- 耗时(ms)
+    create_time TEXT            -- 操作时间
+);
+
+-- 幂等升级 operation_logs 表：新增字段（已存在则跳过）
+ALTER TABLE operation_logs ADD COLUMN IF NOT EXISTS error_type TEXT;       -- 异常类型：RuntimeError / ValueError / ConnectionError
+ALTER TABLE operation_logs ADD COLUMN IF NOT EXISTS error_traceback TEXT; -- 完整异常堆栈
+ALTER TABLE operation_logs ADD COLUMN IF NOT EXISTS func_name TEXT;       -- 出错的函数名
+
+-- 索引
+CREATE INDEX IF NOT EXISTS idx_op_user_time ON operation_logs(user_id, create_time DESC);
+CREATE INDEX IF NOT EXISTS idx_op_module_time ON operation_logs(module, create_time DESC);
+CREATE INDEX IF NOT EXISTS idx_op_status ON operation_logs(status, create_time DESC);
+CREATE INDEX IF NOT EXISTS idx_op_action ON operation_logs(action);
+CREATE INDEX IF NOT EXISTS idx_op_create_time ON operation_logs(create_time DESC);
+CREATE INDEX IF NOT EXISTS idx_op_error_type ON operation_logs(error_type);

backend/app/db/sql/003_model_path_governance.sql

@@ -0,0 +1,20 @@
+-- 003_model_path_governance
+-- 模型路径治理：增加 can_train 标识，区分本地可训练模型与 API / 远程模型。
+-- 训练预检阶段依赖该字段拦截不适合 LLaMA-Factory 本地训练的基座模型。
+
+-- 1. models 表增加 can_train（默认 0，后设搬迁为 1 的规则如下）
+ALTER TABLE models ADD COLUMN IF NOT EXISTS can_train INTEGER NOT NULL DEFAULT 0;
+
+-- 2. 将已有模型按规则推定 can_train：
+--    - path 非空 且 model_source != 'api' → 可训练 (1)
+--    - 其余 → 不可训练 (0)
+UPDATE models
+SET can_train = CASE
+    WHEN path IS NOT NULL AND path != '' AND model_source IS NOT NULL AND model_source != 'api' THEN 1
+    ELSE 0
+END;
+
+-- 3. 给 trained_models 增加 artifact_dir（训练产物目录扫描结果目录）
+ALTER TABLE trained_models ADD COLUMN IF NOT EXISTS artifact_dir TEXT;
+ALTER TABLE trained_models ADD COLUMN IF NOT EXISTS compute_node_id TEXT;
+ALTER TABLE trained_models ADD COLUMN IF NOT EXISTS compute_node_name TEXT;

backend/app/db/sql/003_tenant_quota.sql

@@ -0,0 +1,3 @@
+-- 租户配额与保留策略扩展（如后续治理表需补列，可在此追加）
+ALTER TABLE tenants ADD COLUMN IF NOT EXISTS gpu_quota TEXT;
+ALTER TABLE tenants ADD COLUMN IF NOT EXISTS storage_quota TEXT;

backend/app/db/sql/004_permissions.sql

@@ -0,0 +1,22 @@
+-- ============================================================
+-- 权限体系扩展：GPU 分配表 + 资源所有权字段
+-- ============================================================
+
+-- GPU 分配表：管理员指定哪些用户可以使用哪些 GPU 卡
+CREATE TABLE IF NOT EXISTS gpu_assignments (
+    id          TEXT PRIMARY KEY,
+    node_id     TEXT NOT NULL REFERENCES compute_nodes(id) ON DELETE CASCADE,
+    gpu_index   INTEGER NOT NULL,
+    user_id     TEXT NOT NULL,
+    assigned_by TEXT,
+    assigned_at TEXT NOT NULL,
+    UNIQUE (node_id, gpu_index, user_id)
+);
+CREATE INDEX IF NOT EXISTS idx_gpu_assignments_user ON gpu_assignments(user_id);
+CREATE INDEX IF NOT EXISTS idx_gpu_assignments_gpu ON gpu_assignments(node_id, gpu_index);
+
+-- 资源所有权字段：用户创建的数据集/模型/训练产物/评测任务
+ALTER TABLE datasets ADD COLUMN IF NOT EXISTS created_by TEXT;
+ALTER TABLE models ADD COLUMN IF NOT EXISTS created_by TEXT;
+ALTER TABLE trained_models ADD COLUMN IF NOT EXISTS created_by TEXT;
+ALTER TABLE eval_tasks ADD COLUMN IF NOT EXISTS created_by TEXT;

backend/app/db/sql/005_storage_progress_migration.sql

@@ -0,0 +1,32 @@
+-- YG Fine-Tune Platform additive migration: MinIO completion and cache manifest.
+-- Execute with psql against an existing database after taking a schema backup.
+-- The statements are idempotent and are also included in 000_full_init.sql.
+
+BEGIN;
+
+ALTER TABLE resource_replicas ADD COLUMN IF NOT EXISTS version_id TEXT;
+ALTER TABLE resource_replicas ADD COLUMN IF NOT EXISTS storage_object_id TEXT;
+ALTER TABLE users ADD COLUMN IF NOT EXISTS tenant_id TEXT NOT NULL DEFAULT 'default';
+ALTER TABLE storage_objects ADD COLUMN IF NOT EXISTS metadata TEXT NOT NULL DEFAULT '{}';
+ALTER TABLE model_artifacts ADD COLUMN IF NOT EXISTS storage_object_id TEXT;
+ALTER TABLE model_artifacts ADD COLUMN IF NOT EXISTS storage_backend TEXT NOT NULL DEFAULT 'minio';
+ALTER TABLE dataset_files ADD COLUMN IF NOT EXISTS storage_object_id TEXT;
+ALTER TABLE data_convert_tasks ADD COLUMN IF NOT EXISTS created_by TEXT;
+ALTER TABLE data_convert_tasks ADD COLUMN IF NOT EXISTS storage_backend TEXT NOT NULL DEFAULT 'minio';
+ALTER TABLE data_convert_tasks ADD COLUMN IF NOT EXISTS output_storage_object_id TEXT;
+ALTER TABLE data_convert_tasks ADD COLUMN IF NOT EXISTS output_content TEXT;
+ALTER TABLE eval_tasks ADD COLUMN IF NOT EXISTS deleted_at TEXT;
+ALTER TABLE eval_tasks ADD COLUMN IF NOT EXISTS deleted_by TEXT;
+ALTER TABLE eval_tasks ADD COLUMN IF NOT EXISTS created_by TEXT;
+ALTER TABLE eval_tasks ADD COLUMN IF NOT EXISTS tenant_id TEXT;
+ALTER TABLE eval_tasks ADD COLUMN IF NOT EXISTS project_id TEXT;
+ALTER TABLE eval_tasks ADD COLUMN IF NOT EXISTS report_storage_object_id TEXT;
+
+CREATE INDEX IF NOT EXISTS idx_resource_replicas_object_005
+    ON resource_replicas(storage_object_id, node_id);
+CREATE INDEX IF NOT EXISTS idx_storage_objects_resource_005
+    ON storage_objects(resource_type, resource_id, version_id, status);
+CREATE INDEX IF NOT EXISTS idx_eval_tasks_active_005
+    ON eval_tasks(create_time DESC) WHERE deleted_at IS NULL;
+
+COMMIT;

backend/app/db/sql/006_gpu_reservations.sql

@@ -0,0 +1,21 @@
+-- 原子 GPU 预留：评测和推理与训练统一纳入调度占用模型。
+BEGIN;
+
+CREATE TABLE IF NOT EXISTS gpu_reservations (
+    id TEXT PRIMARY KEY,
+    node_id TEXT NOT NULL REFERENCES compute_nodes(id) ON DELETE CASCADE,
+    gpu_index INTEGER NOT NULL,
+    owner_type TEXT NOT NULL CHECK (owner_type IN ('eval', 'inference')),
+    owner_id TEXT NOT NULL,
+    status TEXT NOT NULL DEFAULT 'reserved' CHECK (status IN ('reserved', 'released')),
+    create_time TEXT NOT NULL,
+    released_at TEXT
+);
+CREATE INDEX IF NOT EXISTS idx_gpu_reservations_owner
+    ON gpu_reservations(owner_type, owner_id, status);
+CREATE INDEX IF NOT EXISTS idx_gpu_reservations_node_status
+    ON gpu_reservations(node_id, status);
+CREATE UNIQUE INDEX IF NOT EXISTS uq_gpu_reservations_active
+    ON gpu_reservations(node_id, gpu_index) WHERE status = 'reserved';
+
+COMMIT;

backend/app/db/sql/007_platform_completion.sql

@@ -0,0 +1,33 @@
+-- 平台可靠性闭环：导出权限、对象清理、缓存 manifest 元数据。
+BEGIN;
+
+ALTER TABLE model_export_jobs ADD COLUMN IF NOT EXISTS created_by TEXT;
+ALTER TABLE model_export_jobs ADD COLUMN IF NOT EXISTS tenant_id TEXT;
+ALTER TABLE model_export_jobs ADD COLUMN IF NOT EXISTS archive_status TEXT NOT NULL DEFAULT 'pending';
+ALTER TABLE model_export_jobs ADD COLUMN IF NOT EXISTS archive_error TEXT;
+
+ALTER TABLE storage_objects ADD COLUMN IF NOT EXISTS deleted_at TEXT;
+ALTER TABLE storage_objects ADD COLUMN IF NOT EXISTS deleted_by TEXT;
+ALTER TABLE storage_objects ADD COLUMN IF NOT EXISTS cleanup_attempts INTEGER NOT NULL DEFAULT 0;
+ALTER TABLE storage_objects ADD COLUMN IF NOT EXISTS last_cleanup_error TEXT;
+ALTER TABLE storage_objects ADD COLUMN IF NOT EXISTS last_verified_at TEXT;
+
+ALTER TABLE storage_cache_jobs ADD COLUMN IF NOT EXISTS version_id TEXT;
+ALTER TABLE storage_cache_jobs ADD COLUMN IF NOT EXISTS checksum_sha256 TEXT;
+ALTER TABLE storage_cache_jobs ADD COLUMN IF NOT EXISTS byte_size BIGINT NOT NULL DEFAULT 0;
+ALTER TABLE storage_cache_jobs ADD COLUMN IF NOT EXISTS last_accessed_at TEXT;
+ALTER TABLE storage_cache_jobs ADD COLUMN IF NOT EXISTS protected_until TEXT;
+
+CREATE TABLE IF NOT EXISTS storage_cleanup_jobs (
+    id TEXT PRIMARY KEY,
+    storage_object_id TEXT NOT NULL REFERENCES storage_objects(id) ON DELETE CASCADE,
+    action TEXT NOT NULL DEFAULT 'delete',
+    status TEXT NOT NULL DEFAULT 'pending',
+    attempts INTEGER NOT NULL DEFAULT 0,
+    error TEXT,
+    create_time TEXT NOT NULL,
+    completed_at TEXT
+);
+CREATE INDEX IF NOT EXISTS idx_storage_cleanup_status ON storage_cleanup_jobs(status, create_time);
+
+COMMIT;

backend/app/db/sql/008_permission_v2.sql

@@ -0,0 +1,53 @@
+-- 权限 2.0：租户成员、资源申请、ACL 生命周期和审批动作
+
+CREATE TABLE IF NOT EXISTS tenant_members (
+    tenant_id TEXT NOT NULL,
+    user_id TEXT NOT NULL,
+    role TEXT NOT NULL DEFAULT 'member',
+    status TEXT NOT NULL DEFAULT 'active',
+    invited_by TEXT,
+    joined_at TEXT,
+    expires_at TEXT,
+    PRIMARY KEY (tenant_id, user_id)
+);
+CREATE INDEX IF NOT EXISTS idx_tenant_members_user ON tenant_members(user_id, status);
+CREATE INDEX IF NOT EXISTS idx_tenant_members_tenant ON tenant_members(tenant_id, status);
+
+CREATE TABLE IF NOT EXISTS resource_access_requests (
+    id TEXT PRIMARY KEY,
+    tenant_id TEXT NOT NULL,
+    resource_type TEXT NOT NULL,
+    resource_id TEXT NOT NULL,
+    applicant_id TEXT NOT NULL,
+    principal_type TEXT NOT NULL DEFAULT 'user',
+    principal_id TEXT NOT NULL,
+    requested_permissions TEXT NOT NULL DEFAULT '[]',
+    reason TEXT,
+    approval_id TEXT,
+    status TEXT NOT NULL DEFAULT 'pending',
+    expires_at TEXT,
+    created_at TEXT NOT NULL,
+    decided_at TEXT,
+    decided_by TEXT
+);
+CREATE INDEX IF NOT EXISTS idx_resource_access_requests_resource
+    ON resource_access_requests(resource_type, resource_id, status);
+CREATE INDEX IF NOT EXISTS idx_resource_access_requests_applicant
+    ON resource_access_requests(applicant_id, status);
+
+ALTER TABLE acls ADD COLUMN IF NOT EXISTS tenant_id TEXT;
+ALTER TABLE acls ADD COLUMN IF NOT EXISTS granted_by TEXT;
+ALTER TABLE acls ADD COLUMN IF NOT EXISTS source_request_id TEXT;
+ALTER TABLE acls ADD COLUMN IF NOT EXISTS expires_at TEXT;
+ALTER TABLE acls ADD COLUMN IF NOT EXISTS revoked_at TEXT;
+CREATE INDEX IF NOT EXISTS idx_acls_tenant_active ON acls(tenant_id, revoked_at, expires_at);
+
+ALTER TABLE approval_instances ADD COLUMN IF NOT EXISTS action TEXT;
+ALTER TABLE approval_instances ADD COLUMN IF NOT EXISTS requested_permissions TEXT NOT NULL DEFAULT '[]';
+ALTER TABLE approval_instances ADD COLUMN IF NOT EXISTS reason TEXT;
+ALTER TABLE approval_instances ADD COLUMN IF NOT EXISTS tenant_id TEXT;
+ALTER TABLE approval_instances ADD COLUMN IF NOT EXISTS expires_at TEXT;
+ALTER TABLE approval_instances ADD COLUMN IF NOT EXISTS decided_by TEXT;
+ALTER TABLE approval_instances ADD COLUMN IF NOT EXISTS decided_at TEXT;
+ALTER TABLE approval_steps ADD COLUMN IF NOT EXISTS approver_type TEXT NOT NULL DEFAULT 'user';
+

backend/app/db/sql/009_permission_completion.sql

@@ -0,0 +1,116 @@
+-- 权限 2.0 完整闭环：审批策略、执行状态、结构化审计与历史租户归属
+
+-- 该迁移可独立执行：兼容仅执行过 000_full_init.sql、或未执行 008 的旧数据库。
+CREATE TABLE IF NOT EXISTS tenant_members (
+    tenant_id TEXT NOT NULL,
+    user_id TEXT NOT NULL,
+    role TEXT NOT NULL DEFAULT 'member',
+    status TEXT NOT NULL DEFAULT 'active',
+    invited_by TEXT,
+    joined_at TEXT,
+    expires_at TEXT,
+    PRIMARY KEY (tenant_id, user_id)
+);
+CREATE INDEX IF NOT EXISTS idx_tenant_members_user ON tenant_members(user_id, status);
+CREATE INDEX IF NOT EXISTS idx_tenant_members_tenant ON tenant_members(tenant_id, status);
+INSERT INTO tenant_members (tenant_id, user_id, role, status, joined_at)
+SELECT COALESCE(u.tenant_id, 'default'), u.id,
+       CASE WHEN u.role='admin' OR COALESCE(u.protected, 0)=1 THEN 'owner' ELSE 'member' END,
+       'active', COALESCE(u.create_time, NOW()::text)
+FROM users u
+ON CONFLICT (tenant_id, user_id) DO NOTHING;
+
+CREATE TABLE IF NOT EXISTS resource_access_requests (
+    id TEXT PRIMARY KEY,
+    tenant_id TEXT NOT NULL DEFAULT 'default',
+    resource_type TEXT NOT NULL,
+    resource_id TEXT NOT NULL,
+    applicant_id TEXT NOT NULL,
+    principal_type TEXT NOT NULL DEFAULT 'user',
+    principal_id TEXT NOT NULL,
+    requested_permissions TEXT NOT NULL DEFAULT '[]',
+    reason TEXT,
+    approval_id TEXT,
+    status TEXT NOT NULL DEFAULT 'pending',
+    expires_at TEXT,
+    created_at TEXT NOT NULL DEFAULT to_char(now(), 'YYYY-MM-DD"T"HH24:MI:SS.MS"Z"'),
+    decided_at TEXT,
+    decided_by TEXT
+);
+ALTER TABLE approval_instances ADD COLUMN IF NOT EXISTS action TEXT;
+ALTER TABLE approval_instances ADD COLUMN IF NOT EXISTS requested_permissions TEXT NOT NULL DEFAULT '[]';
+ALTER TABLE approval_instances ADD COLUMN IF NOT EXISTS reason TEXT;
+ALTER TABLE approval_instances ADD COLUMN IF NOT EXISTS tenant_id TEXT;
+ALTER TABLE approval_instances ADD COLUMN IF NOT EXISTS expires_at TEXT;
+ALTER TABLE approval_instances ADD COLUMN IF NOT EXISTS decided_by TEXT;
+ALTER TABLE approval_instances ADD COLUMN IF NOT EXISTS decided_at TEXT;
+ALTER TABLE approval_steps ADD COLUMN IF NOT EXISTS approver_type TEXT NOT NULL DEFAULT 'user';
+ALTER TABLE acls ADD COLUMN IF NOT EXISTS tenant_id TEXT;
+ALTER TABLE acls ADD COLUMN IF NOT EXISTS granted_by TEXT;
+ALTER TABLE acls ADD COLUMN IF NOT EXISTS source_request_id TEXT;
+ALTER TABLE acls ADD COLUMN IF NOT EXISTS expires_at TEXT;
+ALTER TABLE acls ADD COLUMN IF NOT EXISTS revoked_at TEXT;
+ALTER TABLE datasets ADD COLUMN IF NOT EXISTS tenant_id TEXT;
+ALTER TABLE models ADD COLUMN IF NOT EXISTS tenant_id TEXT;
+ALTER TABLE trained_models ADD COLUMN IF NOT EXISTS tenant_id TEXT;
+ALTER TABLE eval_tasks ADD COLUMN IF NOT EXISTS tenant_id TEXT;
+
+ALTER TABLE approval_templates ADD COLUMN IF NOT EXISTS tenant_id TEXT;
+ALTER TABLE approval_templates ADD COLUMN IF NOT EXISTS action TEXT;
+ALTER TABLE approval_templates ADD COLUMN IF NOT EXISTS resource_type TEXT;
+ALTER TABLE approval_templates ADD COLUMN IF NOT EXISTS scope TEXT NOT NULL DEFAULT 'tenant';
+ALTER TABLE approval_templates ADD COLUMN IF NOT EXISTS status TEXT NOT NULL DEFAULT 'active';
+ALTER TABLE approval_templates ADD COLUMN IF NOT EXISTS created_by TEXT;
+ALTER TABLE approval_templates ADD COLUMN IF NOT EXISTS updated_at TEXT;
+CREATE INDEX IF NOT EXISTS idx_approval_templates_match
+    ON approval_templates(tenant_id, action, resource_type, status);
+
+ALTER TABLE approval_instances ADD COLUMN IF NOT EXISTS execution_status TEXT NOT NULL DEFAULT 'pending';
+ALTER TABLE approval_instances ADD COLUMN IF NOT EXISTS execution_error TEXT;
+ALTER TABLE approval_instances ADD COLUMN IF NOT EXISTS executed_at TEXT;
+ALTER TABLE approval_instances ADD COLUMN IF NOT EXISTS executed_by TEXT;
+CREATE INDEX IF NOT EXISTS idx_approval_instances_execution
+    ON approval_instances(status, execution_status, action, resource_type, resource_id);
+
+ALTER TABLE resource_access_requests ADD COLUMN IF NOT EXISTS cancelled_at TEXT;
+ALTER TABLE resource_access_requests ADD COLUMN IF NOT EXISTS cancelled_by TEXT;
+CREATE INDEX IF NOT EXISTS idx_resource_access_requests_expiry
+    ON resource_access_requests(status, expires_at);
+
+ALTER TABLE projects ADD COLUMN IF NOT EXISTS deleted_at TEXT;
+ALTER TABLE projects ADD COLUMN IF NOT EXISTS deleted_by TEXT;
+CREATE INDEX IF NOT EXISTS idx_projects_active_tenant ON projects(tenant_id, status, deleted_at);
+
+ALTER TABLE tenants ADD COLUMN IF NOT EXISTS deleted_at TEXT;
+ALTER TABLE tenants ADD COLUMN IF NOT EXISTS deleted_by TEXT;
+CREATE INDEX IF NOT EXISTS idx_tenants_active ON tenants(status, deleted_at);
+
+ALTER TABLE data_convert_tasks ADD COLUMN IF NOT EXISTS created_by TEXT;
+ALTER TABLE data_convert_tasks ADD COLUMN IF NOT EXISTS tenant_id TEXT NOT NULL DEFAULT 'default';
+CREATE INDEX IF NOT EXISTS idx_data_convert_tasks_tenant ON data_convert_tasks(tenant_id, deleted_at);
+
+ALTER TABLE audit_logs ADD COLUMN IF NOT EXISTS result TEXT NOT NULL DEFAULT 'success';
+ALTER TABLE audit_logs ADD COLUMN IF NOT EXISTS reason TEXT;
+ALTER TABLE audit_logs ADD COLUMN IF NOT EXISTS request_id TEXT;
+ALTER TABLE audit_logs ADD COLUMN IF NOT EXISTS session_id TEXT;
+ALTER TABLE audit_logs ADD COLUMN IF NOT EXISTS metadata TEXT;
+CREATE INDEX IF NOT EXISTS idx_audit_request ON audit_logs(request_id);
+CREATE INDEX IF NOT EXISTS idx_audit_result ON audit_logs(result, time);
+
+-- 历史资源按创建者租户补齐归属。无法识别的资源保留 default，后续由管理员复核。
+UPDATE datasets d
+SET tenant_id = COALESCE(u.tenant_id, 'default')
+FROM users u
+WHERE d.created_by = u.id AND (d.tenant_id IS NULL OR d.tenant_id = '');
+UPDATE models m
+SET tenant_id = COALESCE(u.tenant_id, 'default')
+FROM users u
+WHERE m.created_by = u.id AND (m.tenant_id IS NULL OR m.tenant_id = '');
+UPDATE trained_models m
+SET tenant_id = COALESCE(u.tenant_id, 'default')
+FROM users u
+WHERE m.created_by = u.id AND (m.tenant_id IS NULL OR m.tenant_id = '');
+UPDATE eval_tasks e
+SET tenant_id = COALESCE(u.tenant_id, 'default')
+FROM users u
+WHERE e.created_by = u.id AND (e.tenant_id IS NULL OR e.tenant_id = '');

backend/app/db/sql/010_permission_quota_membership.sql

@@ -0,0 +1,21 @@
+-- Permission 2.0: atomic tenant quota reservations for GPU-backed tasks.
+-- This migration is additive and safe to run repeatedly.
+
+CREATE TABLE IF NOT EXISTS tenant_quota_reservations (
+    id TEXT PRIMARY KEY,
+    tenant_id TEXT NOT NULL,
+    owner_type TEXT NOT NULL,
+    owner_id TEXT NOT NULL,
+    gpu_count INTEGER NOT NULL DEFAULT 0,
+    storage_bytes BIGINT NOT NULL DEFAULT 0,
+    status TEXT NOT NULL DEFAULT 'reserved',
+    create_time TEXT NOT NULL,
+    released_at TEXT
+);
+
+CREATE INDEX IF NOT EXISTS idx_tenant_quota_reservations_tenant
+    ON tenant_quota_reservations(tenant_id, status);
+CREATE INDEX IF NOT EXISTS idx_tenant_quota_reservations_owner
+    ON tenant_quota_reservations(owner_type, owner_id, status);
+CREATE UNIQUE INDEX IF NOT EXISTS uq_tenant_quota_reservations_active_owner
+    ON tenant_quota_reservations(owner_type, owner_id) WHERE status = 'reserved';

backend/app/db/sql/011_permission_lifecycle.sql

@@ -0,0 +1,20 @@
+-- Permission 2.0: user and inference task lifecycle tombstones.
+-- Additive migration, safe to execute repeatedly.
+
+ALTER TABLE users ADD COLUMN IF NOT EXISTS deleted_at TEXT;
+ALTER TABLE users ADD COLUMN IF NOT EXISTS deleted_by TEXT;
+ALTER TABLE compare_tasks ADD COLUMN IF NOT EXISTS deleted_at TEXT;
+ALTER TABLE compare_tasks ADD COLUMN IF NOT EXISTS deleted_by TEXT;
+ALTER TABLE eval_tasks ADD COLUMN IF NOT EXISTS created_by TEXT;
+ALTER TABLE eval_tasks ADD COLUMN IF NOT EXISTS tenant_id TEXT;
+ALTER TABLE compare_tasks ADD COLUMN IF NOT EXISTS created_by TEXT;
+ALTER TABLE compare_tasks ADD COLUMN IF NOT EXISTS tenant_id TEXT;
+ALTER TABLE data_convert_tasks ADD COLUMN IF NOT EXISTS deleted_by TEXT;
+ALTER TABLE storage_objects ADD COLUMN IF NOT EXISTS deleted_at TEXT;
+ALTER TABLE storage_objects ADD COLUMN IF NOT EXISTS deleted_by TEXT;
+ALTER TABLE storage_objects ADD COLUMN IF NOT EXISTS cleanup_attempts INTEGER NOT NULL DEFAULT 0;
+ALTER TABLE storage_objects ADD COLUMN IF NOT EXISTS last_cleanup_error TEXT;
+ALTER TABLE storage_objects ADD COLUMN IF NOT EXISTS last_verified_at TEXT;
+
+CREATE INDEX IF NOT EXISTS idx_users_active ON users(status, deleted_at);
+CREATE INDEX IF NOT EXISTS idx_compare_tasks_active ON compare_tasks(status, deleted_at);

backend/app/db/sql/012_tenant_user_hierarchy.sql

@@ -0,0 +1,63 @@
+-- Tenant/user hierarchy alignment. Additive and safe to run repeatedly.
+-- New business flows use tenant_members, platform_role, tenant_id and
+-- created_by. Legacy role/project fields remain for compatibility only.
+
+ALTER TABLE users ADD COLUMN IF NOT EXISTS platform_role TEXT NOT NULL DEFAULT 'platform_user';
+UPDATE users
+SET platform_role = CASE
+    WHEN role = 'admin' OR COALESCE(protected, 0) = 1 THEN 'platform_admin'
+    ELSE 'platform_user'
+END
+WHERE platform_role IS NULL OR platform_role NOT IN ('platform_admin', 'platform_user');
+CREATE INDEX IF NOT EXISTS idx_users_platform_role ON users(platform_role, status, deleted_at);
+
+ALTER TABLE fine_tune_tasks ADD COLUMN IF NOT EXISTS tenant_id TEXT NOT NULL DEFAULT 'default';
+ALTER TABLE fine_tune_tasks ADD COLUMN IF NOT EXISTS created_by TEXT;
+ALTER TABLE fine_tune_tasks ADD COLUMN IF NOT EXISTS deleted_at TEXT;
+ALTER TABLE fine_tune_tasks ADD COLUMN IF NOT EXISTS deleted_by TEXT;
+UPDATE fine_tune_tasks
+SET tenant_id = COALESCE(NULLIF(tenant_id, ''), payload::json->>'tenant_id', 'default'),
+    created_by = COALESCE(NULLIF(created_by, ''), payload::json->>'created_by')
+WHERE tenant_id IS NULL OR tenant_id = '' OR created_by IS NULL OR created_by = '';
+CREATE INDEX IF NOT EXISTS idx_fine_tune_tasks_tenant_active
+    ON fine_tune_tasks(tenant_id, status, deleted_at, create_time DESC);
+CREATE INDEX IF NOT EXISTS idx_fine_tune_tasks_creator
+    ON fine_tune_tasks(created_by, deleted_at, create_time DESC);
+
+INSERT INTO tenants (id, name, code, status, quota, create_time)
+VALUES ('default', '默认租户', 'default', 'active', '{}', NOW()::text)
+ON CONFLICT (id) DO UPDATE
+SET status = CASE WHEN COALESCE(tenants.status, 'active') = 'deleted' THEN 'active' ELSE tenants.status END,
+    deleted_at = CASE WHEN COALESCE(tenants.status, 'active') = 'deleted' THEN NULL ELSE tenants.deleted_at END,
+    deleted_by = CASE WHEN COALESCE(tenants.status, 'active') = 'deleted' THEN NULL ELSE tenants.deleted_by END;
+
+-- Make the tenant owner relationship explicit and repair older tenant rows.
+INSERT INTO tenant_members (tenant_id, user_id, role, status, joined_at)
+SELECT t.id, t.owner_user_id, 'owner', 'active', COALESCE(t.create_time, NOW()::text)
+FROM tenants t
+JOIN users u ON u.id = t.owner_user_id
+WHERE t.owner_user_id IS NOT NULL
+  AND COALESCE(t.status, 'active') = 'active'
+ON CONFLICT (tenant_id, user_id) DO UPDATE
+SET role = 'owner', status = 'active';
+
+-- Existing account creation used admin as a tenant owner. Platform role and
+-- tenant role are separate, so keep only explicit tenant owners as owners.
+UPDATE tenant_members tm
+SET role = 'member'
+FROM users u
+WHERE tm.user_id = u.id
+  AND tm.role = 'owner'
+  AND (u.role <> 'admin' AND COALESCE(u.protected, 0) = 0)
+  AND NOT EXISTS (
+      SELECT 1 FROM tenants t
+      WHERE t.id = tm.tenant_id AND t.owner_user_id = tm.user_id
+  );
+
+-- Project is no longer a business isolation boundary. Keep historical columns
+-- readable, but make tenant-scoped queries the only supported new path.
+CREATE INDEX IF NOT EXISTS idx_datasets_tenant_active ON datasets(tenant_id, deleted_at, create_time DESC);
+CREATE INDEX IF NOT EXISTS idx_models_tenant_active ON models(tenant_id, deleted_at, create_time DESC);
+CREATE INDEX IF NOT EXISTS idx_trained_models_tenant_active ON trained_models(tenant_id, deleted_at, create_time DESC);
+CREATE INDEX IF NOT EXISTS idx_eval_tasks_tenant_active ON eval_tasks(tenant_id, deleted_at, create_time DESC);
+CREATE INDEX IF NOT EXISTS idx_compare_tasks_tenant_active ON compare_tasks(tenant_id, deleted_at, create_time DESC);

backend/app/main.py

@@ -0,0 +1,48 @@
+import asyncio
+from contextlib import suppress
+
+from fastapi import FastAPI
+from fastapi.middleware.cors import CORSMiddleware
+
+from app.core.cache_paths import setup_local_caches
+
+# 在任何 docling / tiktoken 模块被实例化之前设置缓存路径，避免首调用走到 ~/.cache。
+setup_local_caches()
+
+from app.api.v1.router import api_router  # noqa: E402
+from app.core.config import docs_kwargs, get_settings  # noqa: E402
+from app.core.logging import configure_logging, setup_request_logging  # noqa: E402
+from app.workers.compute_poller import run_compute_poller  # noqa: E402
+
+
+def create_app() -> FastAPI:
+    settings = get_settings()
+    configure_logging(settings)
+
+    app = FastAPI(title=settings.app_name, **docs_kwargs(settings.enable_docs))
+    app.add_middleware(
+        CORSMiddleware,
+        allow_origins=settings.cors_allow_origins,
+        allow_credentials=True,
+        allow_methods=["*"],
+        allow_headers=["*"],
+    )
+    setup_request_logging(app)
+    app.include_router(api_router, prefix=settings.route_prefix)
+
+    @app.on_event("startup")
+    async def start_workers() -> None:
+        app.state.compute_poller_task = asyncio.create_task(run_compute_poller())
+
+    @app.on_event("shutdown")
+    async def stop_workers() -> None:
+        task = getattr(app.state, "compute_poller_task", None)
+        if task:
+            task.cancel()
+            with suppress(asyncio.CancelledError):
+                await task
+
+    return app
+
+
+app = create_app()

backend/app/modules/README.md

@@ -0,0 +1,15 @@
+# Backend Module Convention
+
+每个业务模块建议保持一致结构：
+
+```text
+module_name/
+  __init__.py
+  router.py       # FastAPI router
+  schemas.py      # Pydantic request/response models
+  service.py      # Business orchestration
+  repository.py   # Database access
+  permissions.py  # Optional resource permission checks
+```
+
+模块边界以 `docs/system-development-plan.md` 的页面模块开发工作包为准。

backend/app/modules/approval/__init__.py

@@ -0,0 +1 @@
+"""Approval workflow module."""

backend/app/modules/approval/router.py

@@ -0,0 +1,396 @@
+from __future__ import annotations
+
+import json
+from fastapi import APIRouter, Body, Depends
+from typing import Any
+
+from app.api.v1.endpoints.platform import ok, fail
+from app.db.platform_store import get_platform_store
+from app.core.auth import (
+    get_current_user,
+    has_resource_access,
+    is_tenant_admin,
+    is_admin,
+    resource_in_user_tenant,
+    resource_record,
+)
+
+router = APIRouter(prefix="/approvals", tags=["approval"])
+
+# Approval actions are deliberately finite.  A caller must not be able to
+# create an arbitrary approval that no executor or audit policy understands.
+ALLOWED_APPROVAL_ACTIONS = {
+    "resource.access",
+    "gpu.assign",
+    "tenant.quota.update",
+    "tenant.member.add",
+    "tenant.member.remove",
+    "model.use",
+    "dataset.use",
+    "dataset.delete",
+    "trained_model.merge",
+    "trained_model.export",
+    "trained_model.delete",
+    "fine_tune.stop",
+    "fine_tune.delete",
+    "eval.delete",
+    "inference.delete",
+    "project.archive",
+    "project.delete",
+}
+
+
+def _available_gpu_options() -> list[dict[str, Any]]:
+    """Return only online nodes and currently unassigned, idle GPUs."""
+    store = get_platform_store()
+    nodes = store.compute_nodes()
+    gpus = store.gpus()
+    assigned = {(str(item.get("node_id")), int(item.get("gpu_index"))) for item in store.gpu_assignments()}
+    by_node: dict[str, list[dict[str, Any]]] = {}
+    for gpu in gpus:
+        node_id = str(gpu.get("node_id") or "")
+        index = int(gpu.get("id") or 0)
+        if gpu.get("status") != "idle" or (node_id, index) in assigned:
+            continue
+        by_node.setdefault(node_id, []).append({
+            "index": index,
+            "name": gpu.get("name") or "GPU",
+            "memory_total_gb": float(gpu.get("memory_total_gb") or 0),
+        })
+    result = []
+    for node in nodes:
+        node_id = str(node.get("id") or "")
+        if not node.get("enabled") or node.get("scheduler_status") != "online" or not by_node.get(node_id):
+            continue
+        result.append({
+            "id": node_id,
+            "code": node.get("code") or node_id,
+            "name": node.get("name") or node.get("code") or node_id,
+            "gpus": sorted(by_node[node_id], key=lambda item: item["index"]),
+        })
+    return result
+
+
+def _validate_gpu_request(assignments: Any) -> list[dict[str, Any]]:
+    if not isinstance(assignments, list) or not assignments:
+        raise fail(400, "assignments 不能为空")
+    available = {
+        (node["id"], gpu["index"])
+        for node in _available_gpu_options()
+        for gpu in node["gpus"]
+    }
+    normalized = []
+    seen: set[tuple[str, int]] = set()
+    for item in assignments:
+        if not isinstance(item, dict) or not item.get("node_id") or item.get("gpu_index") is None:
+            raise fail(400, "每项必须包含 node_id 和 gpu_index")
+        try:
+            key = (str(item["node_id"]), int(item["gpu_index"]))
+        except (TypeError, ValueError):
+            raise fail(400, "gpu_index 必须是整数")
+        if key not in available:
+            raise fail(409, f"GPU {key[0]}:{key[1]} 当前不可申请")
+        if key not in seen:
+            seen.add(key)
+            normalized.append({"node_id": key[0], "gpu_index": key[1]})
+    return normalized
+
+
+@router.get("/templates")
+def list_templates(current_user: dict = Depends(get_current_user)) -> dict[str, Any]:
+    if not is_admin(current_user):
+        raise fail(403, "admin permission required")
+    return ok(get_platform_store().approval_templates())
+
+
+@router.post("/templates")
+def create_template(payload: dict[str, Any] = Body(...), current_user: dict = Depends(get_current_user)) -> dict[str, Any]:
+    if not is_admin(current_user): raise fail(403, "admin permission required")
+    if not payload.get("name"):
+        raise fail(400, "name 必填")
+    steps = payload.get("steps") or []
+    if not isinstance(steps, list) or any(not isinstance(step, dict) for step in steps):
+        raise fail(400, "steps 格式无效")
+    if payload.get("action") and payload["action"] not in ALLOWED_APPROVAL_ACTIONS:
+        raise fail(400, "不支持的审批动作")
+    payload = {
+        **payload,
+        "created_by": current_user.get("id"),
+        "tenant_id": payload.get("tenant_id") or current_user.get("tenant_id") or "default",
+        "scope": payload.get("scope") or "tenant",
+        "status": payload.get("status") or "active",
+    }
+    template = get_platform_store().create_approval_template(payload)
+    get_platform_store().record_audit(
+        action="approval.template.create", actor_id=current_user.get("id"),
+        target_type="approval_template", target_id=template["id"],
+        tenant_id=template.get("tenant_id"),
+    )
+    return ok(template)
+
+
+@router.get("/templates/{template_id}")
+def get_template(template_id: str, current_user: dict = Depends(get_current_user)) -> dict[str, Any]:
+    if not is_admin(current_user):
+        raise fail(403, "admin permission required")
+    try:
+        return ok(get_platform_store().approval_template(template_id))
+    except KeyError:
+        raise fail(404, "template not found")
+
+
+@router.put("/templates/{template_id}")
+def update_template(template_id: str, payload: dict[str, Any] = Body(...), current_user: dict = Depends(get_current_user)) -> dict[str, Any]:
+    if not is_admin(current_user): raise fail(403, "admin permission required")
+    if payload.get("action") and payload["action"] not in ALLOWED_APPROVAL_ACTIONS:
+        raise fail(400, "不支持的审批动作")
+    try:
+        template = get_platform_store().update_approval_template(template_id, payload)
+        get_platform_store().record_audit(
+            action="approval.template.update", actor_id=current_user.get("id"),
+            target_type="approval_template", target_id=template_id,
+            tenant_id=template.get("tenant_id"), detail=f"fields={','.join(payload.keys())}",
+        )
+        return ok(template)
+    except KeyError:
+        raise fail(404, "template not found")
+
+
+@router.delete("/templates/{template_id}")
+def delete_template(template_id: str, current_user: dict = Depends(get_current_user)) -> dict[str, Any]:
+    if not is_admin(current_user): raise fail(403, "admin permission required")
+    try:
+        template = get_platform_store().delete_approval_template(template_id)
+        get_platform_store().record_audit(
+            action="approval.template.delete", actor_id=current_user.get("id"),
+            target_type="approval_template", target_id=template_id,
+            tenant_id=template.get("tenant_id"),
+        )
+        return ok(template)
+    except KeyError:
+        raise fail(404, "template not found")
+
+
+@router.get("")
+def list_instances(
+    status: str | None = None,
+    mine: bool = False,
+    current_user: dict = Depends(get_current_user),
+) -> dict[str, Any]:
+    user_id = current_user.get("id")
+    items = get_platform_store().approval_instances(
+        status=status,
+        applicant_id=user_id if mine and not is_admin(current_user) else None,
+    )
+    if is_admin(current_user):
+        return ok(items)
+    if mine:
+        return ok(items)
+    visible = []
+    for item in items:
+        if item.get("applicant_id") == user_id:
+            visible.append(item)
+            continue
+        if any(step.get("approver_id") == user_id and step.get("status") == "pending" for step in item.get("steps", [])):
+            visible.append(item)
+            continue
+        if is_tenant_admin(current_user, item.get("tenant_id")) and item.get("status") == "pending":
+            visible.append(item)
+    return ok(visible)
+
+
+@router.get("/gpu-options")
+def gpu_request_options(current_user: dict = Depends(get_current_user)) -> dict[str, Any]:
+    """Self-service GPU options; does not expose the admin compute page."""
+    return ok({"nodes": _available_gpu_options()})
+
+
+@router.post("/gpu-requests")
+def create_gpu_request(payload: dict[str, Any] = Body(...), current_user: dict = Depends(get_current_user)) -> dict[str, Any]:
+    assignments = _validate_gpu_request(payload.get("assignments"))
+    user_id = str(current_user.get("id") or "")
+    if is_admin(current_user):
+        try:
+            return ok({"approval_required": False, "assignments": get_platform_store().assign_gpus(
+                [{**item, "user_id": user_id} for item in assignments], assigned_by=user_id,
+            )})
+        except ValueError as exc:
+            raise fail(409, str(exc))
+    normalized = [{**item, "user_id": user_id} for item in assignments]
+    instance = get_platform_store().create_approval_instance({
+        "resource_type": "gpu",
+        "resource_id": f"batch:{user_id}",
+        "applicant_id": user_id,
+        "action": "gpu.assign",
+        "tenant_id": current_user.get("tenant_id") or "default",
+        "reason": json.dumps({"assignments": normalized, "reason": payload.get("reason")}, ensure_ascii=False),
+    })
+    get_platform_store().record_audit(
+        action="gpu.assign.request", actor_id=user_id, target_type="gpu",
+        target_id=instance["id"], tenant_id=current_user.get("tenant_id") or "default",
+        detail=f"count={len(normalized)}",
+    )
+    return ok({"approval_required": True, "approval_id": instance["id"], "approval": instance})
+
+
+@router.post("")
+def create_instance(payload: dict[str, Any] = Body(...), current_user: dict = Depends(get_current_user)) -> dict[str, Any]:
+    payload["applicant_id"] = current_user.get("id")
+    for field in ("resource_type", "resource_id"):
+        if not payload.get(field):
+            raise fail(400, f"{field} 必填")
+    resource = resource_record(str(payload["resource_type"]), str(payload["resource_id"]))
+    if not resource and not is_admin(current_user):
+        raise fail(404, "resource not found")
+    action = str(payload.get("action") or "")
+    if not action or action not in ALLOWED_APPROVAL_ACTIONS:
+        raise fail(400, "不支持的审批动作")
+    if action != "resource.access" and not is_admin(current_user) and not has_resource_access(
+        str(payload["resource_type"]), str(payload["resource_id"]), current_user, "read"
+    ):
+        raise fail(403, "no permission to request approval for this resource")
+    if resource and not is_admin(current_user) and not resource_in_user_tenant(str(payload["resource_type"]), resource, current_user):
+        raise fail(403, "resource belongs to another tenant")
+    requested = payload.get("requested_permissions") or []
+    allowed = {"read", "write", "execute", "download"}
+    if any(permission not in allowed for permission in requested):
+        raise fail(400, "invalid requested permission")
+    payload["tenant_id"] = current_user.get("tenant_id") or "default"
+    payload["requested_permissions"] = requested
+    try:
+        return ok(get_platform_store().create_approval_instance(payload))
+    except KeyError:
+        raise fail(404, "template not found")
+
+
+@router.get("/{instance_id}")
+def get_instance(instance_id: str, current_user: dict = Depends(get_current_user)) -> dict[str, Any]:
+    try:
+        item = get_platform_store().approval_instance(instance_id)
+        if not is_admin(current_user) and item.get("applicant_id") != current_user.get("id") and not is_tenant_admin(current_user, item.get("tenant_id")):
+            raise fail(403, "no permission to access approval")
+        return ok(item)
+    except KeyError:
+        raise fail(404, "instance not found")
+
+
+@router.post("/{instance_id}/steps/{step_index}/decision")
+def decide(
+    instance_id: str,
+    step_index: int,
+    payload: dict[str, Any] = Body(...),
+    current_user: dict = Depends(get_current_user),
+) -> dict[str, Any]:
+    try:
+        instance = get_platform_store().approval_instance(instance_id)
+        if instance.get("applicant_id") == current_user.get("id"):
+            raise fail(403, "applicant cannot approve own request")
+        step = next((item for item in instance.get("steps", []) if int(item.get("step_index", -1)) == step_index), None)
+        if not step and is_admin(current_user) and not instance.get("steps"):
+            step = {"approver_id": None, "status": "pending"}
+        if not step:
+            raise fail(404, "approval step not found")
+        designated = step.get("approver_id")
+        if not is_admin(current_user) and designated != current_user.get("id") and not (
+            step.get("approver_type") == "admin" and is_tenant_admin(current_user, instance.get("tenant_id"))
+        ):
+            raise fail(403, "current user is not the designated approver")
+        if instance.get("action") == "tenant.quota.update" and not is_admin(current_user):
+            raise fail(403, "only platform administrator can approve tenant quota changes")
+        submitted_approver = payload.get("approver_id")
+        if submitted_approver and submitted_approver != current_user.get("id"):
+            raise fail(403, "approver_id must match current session")
+        store = get_platform_store()
+        result = store.decide_approval_step(
+                instance_id,
+                step_index,
+                approver_id=str(current_user.get("id")),
+                approved=bool(payload.get("approved", False)),
+                comment=payload.get("comment"),
+            )
+        if result.get("status") == "approved" and result.get("execution_status") == "ready":
+            try:
+                effect = store.apply_approval_effect(result, str(current_user.get("id") or ""))
+                if effect is not None:
+                    result = store.approval_instance(instance_id)
+            except Exception as exc:
+                with store.connect() as conn:
+                    conn.execute(
+                        "UPDATE approval_instances SET execution_status='failed', execution_error=? WHERE id=?",
+                        (str(exc), instance_id),
+                    )
+                raise fail(409, f"审批已通过，但执行失败：{exc}")
+        store.record_audit(
+            action="approval.decision", actor_id=current_user.get("id"),
+            target_type="approval_instance", target_id=instance_id,
+            tenant_id=result.get("tenant_id"), result="success" if payload.get("approved") else "rejected",
+            detail=f"step={step_index}", reason=payload.get("comment"),
+        )
+        return ok(result)
+    except (KeyError, ValueError) as e:
+        raise fail(400, str(e))
+
+
+@router.post("/resource-access/requests")
+def create_resource_access_request(payload: dict[str, Any] = Body(...), current_user: dict = Depends(get_current_user)) -> dict[str, Any]:
+    resource_type = str(payload.get("resource_type") or "")
+    resource_id = str(payload.get("resource_id") or "")
+    resource = resource_record(resource_type, resource_id)
+    if not resource:
+        raise fail(404, "resource not found")
+    if not is_admin(current_user) and not resource_in_user_tenant(resource_type, resource, current_user):
+        raise fail(403, "resource belongs to another tenant")
+    permissions = payload.get("requested_permissions") or ["read"]
+    allowed = {"read", "write", "execute", "download"}
+    if not permissions or any(permission not in allowed for permission in permissions):
+        raise fail(400, "invalid requested permissions")
+    result = get_platform_store().create_resource_access_request({
+        "resource_type": resource_type,
+        "resource_id": resource_id,
+        "applicant_id": current_user.get("id"),
+        "principal_type": "user",
+        "principal_id": current_user.get("id"),
+        "requested_permissions": permissions,
+        "reason": payload.get("reason"),
+        "template_id": payload.get("template_id"),
+        "tenant_id": current_user.get("tenant_id") or "default",
+        "expires_at": payload.get("expires_at"),
+    })
+    get_platform_store().record_audit(
+        action="resource.access.request", actor_id=current_user.get("id"),
+        target_type=resource_type, target_id=resource_id,
+        tenant_id=current_user.get("tenant_id") or "default",
+        detail=f"permissions={','.join(permissions)}",
+    )
+    return ok(result)
+
+
+@router.get("/resource-access/requests")
+def list_resource_access_requests(status: str | None = None, current_user: dict = Depends(get_current_user)) -> dict[str, Any]:
+    items = get_platform_store().resource_access_requests(
+        user_id=None if is_admin(current_user) else current_user.get("id"),
+        status=status,
+    )
+    return ok(items)
+
+
+@router.post("/resource-access/requests/{request_id}/cancel")
+def cancel_resource_access_request(request_id: str, current_user: dict = Depends(get_current_user)) -> dict[str, Any]:
+    try:
+        item = get_platform_store().cancel_resource_access_request(
+            request_id,
+            str(current_user.get("id") or ""),
+            is_admin_actor=is_admin(current_user),
+        )
+    except KeyError:
+        raise fail(404, "access request not found")
+    except PermissionError as exc:
+        raise fail(403, str(exc))
+    except ValueError as exc:
+        raise fail(409, str(exc))
+    get_platform_store().record_audit(
+        action="resource.access.cancel", actor_id=current_user.get("id"),
+        target_type="resource_access_request", target_id=request_id,
+        tenant_id=item.get("tenant_id"),
+    )
+    return ok(item)

backend/app/modules/audit/__init__.py

@@ -0,0 +1 @@
+"""Audit log module."""

backend/app/modules/auth/__init__.py

@@ -0,0 +1 @@
+"""Authentication and user session module."""

backend/app/modules/compute_gateway/__init__.py

@@ -0,0 +1 @@
+"""Application-side compute platform gateway module."""

backend/app/modules/compute_gateway/client.py

@@ -0,0 +1,282 @@
+from __future__ import annotations
+
+import time
+from typing import Any
+from urllib.parse import urljoin
+
+import httpx
+
+from app.core.config import get_settings
+
+
+def _join_url(base_url: str, path: str) -> str:
+    return urljoin(base_url.rstrip("/") + "/", path.lstrip("/"))
+
+
+def _unwrap_items(payload: Any) -> list[dict[str, Any]]:
+    if isinstance(payload, list):
+        return [item for item in payload if isinstance(item, dict)]
+    if isinstance(payload, dict):
+        data = payload.get("data")
+        if isinstance(data, dict) and isinstance(data.get("items"), list):
+            return [item for item in data["items"] if isinstance(item, dict)]
+        if isinstance(payload.get("items"), list):
+            return [item for item in payload["items"] if isinstance(item, dict)]
+        if isinstance(data, list):
+            return [item for item in data if isinstance(item, dict)]
+    return []
+
+
+def _unwrap_dict(payload: Any) -> dict[str, Any]:
+    if isinstance(payload, dict) and isinstance(payload.get("data"), dict):
+        return payload["data"]
+    return payload if isinstance(payload, dict) else {}
+
+
+# Inference calls are intentionally short-timeout:
+#   - load dispatch only confirms the compute node accepted the request
+#     (the actual model load now runs asynchronously on the node).
+#   - status/unload must never block the platform for long when a node is
+#     unreachable but still marked online.
+INFERENCE_LOAD_TIMEOUT = httpx.Timeout(30, connect=10)
+INFERENCE_STATUS_TIMEOUT = httpx.Timeout(30, connect=5)
+INFERENCE_UNLOAD_TIMEOUT = httpx.Timeout(30, connect=5)
+
+
+class ComputeNodeClient:
+    """Application-side client for one compute node.
+
+    The client accepts both current YG Compute API responses and common
+    wrapper shapes such as `{code,message,data}` to make future engine/node
+    adapters less brittle.
+    """
+
+    def __init__(self, api_base_url: str, token: str | None = None, timeout: float | None = None) -> None:
+        settings = get_settings()
+        self.api_base_url = api_base_url.rstrip("/")
+        self.token = token or settings.compute_service_token
+        self.timeout = timeout or settings.compute_request_timeout_seconds
+        self.route_prefix = settings.route_prefix.rstrip("/") or "/modelTF"
+
+    def headers(self) -> dict[str, str]:
+        if not self.token:
+            return {}
+        return {"X-Compute-Token": self.token}
+
+    async def test_connection(self) -> dict[str, Any]:
+        started = time.perf_counter()
+        health = await self.health()
+        gpus = await self.gpus()
+        return {
+            "success": True,
+            "latency_ms": int((time.perf_counter() - started) * 1000),
+            "health": health,
+            "gpus": gpus,
+        }
+
+    async def health(self) -> dict[str, Any]:
+        paths = [f"{self.route_prefix}/v1/compute/health", f"{self.route_prefix}/health", "/health"]
+        last_error = ""
+        async with httpx.AsyncClient(timeout=self.timeout, headers=self.headers()) as client:
+            for path in paths:
+                try:
+                    response = await client.get(_join_url(self.api_base_url, path))
+                    response.raise_for_status()
+                    return _unwrap_dict(response.json())
+                except Exception as exc:  # noqa: BLE001 - keep endpoint compatibility fallback broad
+                    last_error = str(exc)
+        raise RuntimeError(last_error or "compute health check failed")
+
+    async def gpus(self) -> list[dict[str, Any]]:
+        paths = [
+            f"{self.route_prefix}/compute/resources/gpus",
+            f"{self.route_prefix}/v1/compute/resources/gpus",
+            "/compute/resources/gpus",
+        ]
+        last_error = ""
+        async with httpx.AsyncClient(timeout=self.timeout, headers=self.headers()) as client:
+            for path in paths:
+                try:
+                    response = await client.get(_join_url(self.api_base_url, path))
+                    response.raise_for_status()
+                    return _unwrap_items(response.json())
+                except Exception as exc:  # noqa: BLE001
+                    last_error = str(exc)
+        raise RuntimeError(last_error or "compute gpu discovery failed")
+
+    async def create_job(self, payload: dict[str, Any]) -> dict[str, Any]:
+        async with httpx.AsyncClient(timeout=self.timeout, headers=self.headers()) as client:
+            response = await client.post(_join_url(self.api_base_url, f"{self.route_prefix}/compute/jobs"), json=payload)
+            response.raise_for_status()
+            return _unwrap_dict(response.json())
+
+    async def preview_job(self, payload: dict[str, Any]) -> dict[str, Any]:
+        async with httpx.AsyncClient(timeout=self.timeout, headers=self.headers()) as client:
+            response = await client.post(
+                _join_url(self.api_base_url, f"{self.route_prefix}/compute/jobs/preview"),
+                json=payload,
+            )
+            response.raise_for_status()
+            return _unwrap_dict(response.json())
+
+    async def validate_job(self, payload: dict[str, Any]) -> dict[str, Any]:
+        async with httpx.AsyncClient(timeout=self.timeout, headers=self.headers()) as client:
+            response = await client.post(
+                _join_url(self.api_base_url, f"{self.route_prefix}/compute/jobs/validate"),
+                json=payload,
+            )
+            response.raise_for_status()
+            return _unwrap_dict(response.json())
+
+    async def check_paths(self, paths: list[dict[str, Any]]) -> dict[str, Any]:
+        async with httpx.AsyncClient(timeout=self.timeout, headers=self.headers()) as client:
+            response = await client.post(
+                _join_url(self.api_base_url, f"{self.route_prefix}/compute/files/check-paths"),
+                json={"paths": paths},
+            )
+            response.raise_for_status()
+            return _unwrap_dict(response.json())
+
+    async def list_files(
+        self,
+        root: str = "data",
+        relative_path: str = "",
+        directories_only: bool = False,
+    ) -> dict[str, Any]:
+        async with httpx.AsyncClient(timeout=self.timeout, headers=self.headers()) as client:
+            response = await client.get(
+                _join_url(self.api_base_url, f"{self.route_prefix}/compute/files/list"),
+                params={"root": root, "relative_path": relative_path, "directories_only": directories_only},
+            )
+            response.raise_for_status()
+            return _unwrap_dict(response.json())
+
+    async def get_job(self, job_id: str) -> dict[str, Any]:
+        async with httpx.AsyncClient(timeout=self.timeout, headers=self.headers()) as client:
+            response = await client.get(_join_url(self.api_base_url, f"{self.route_prefix}/compute/jobs/{job_id}"))
+            response.raise_for_status()
+            return _unwrap_dict(response.json())
+
+    async def stop_job(self, job_id: str) -> dict[str, Any]:
+        # Compute API waits for the child process to exit (up to 10 seconds)
+        # before returning.  The normal polling timeout is intentionally short,
+        # but is too aggressive for a stop request and used to surface as a
+        # platform 500 even when the node eventually stopped the job.
+        stop_timeout = max(float(self.timeout), 30.0)
+        async with httpx.AsyncClient(timeout=stop_timeout, headers=self.headers()) as client:
+            response = await client.post(_join_url(self.api_base_url, f"{self.route_prefix}/compute/jobs/{job_id}/stop"))
+            response.raise_for_status()
+            return _unwrap_dict(response.json())
+
+    async def job_logs(
+        self,
+        job_id: str,
+        tail_lines: int | None = None,
+        offset: int | None = None,
+        limit: int | None = None,
+    ) -> dict[str, Any]:
+        params = {
+            key: value
+            for key, value in {"tail_lines": tail_lines, "offset": offset, "limit": limit}.items()
+            if value is not None
+        }
+        async with httpx.AsyncClient(timeout=self.timeout, headers=self.headers()) as client:
+            response = await client.get(
+                _join_url(self.api_base_url, f"{self.route_prefix}/compute/jobs/{job_id}/logs"),
+                params=params,
+            )
+            response.raise_for_status()
+            return _unwrap_dict(response.json())
+
+    async def import_local_file(self, payload: dict[str, Any]) -> dict[str, Any]:
+        async with httpx.AsyncClient(timeout=self.timeout, headers=self.headers()) as client:
+            response = await client.post(
+                _join_url(self.api_base_url, f"{self.route_prefix}/compute/files/import-local"),
+                json=payload,
+            )
+            response.raise_for_status()
+            return _unwrap_dict(response.json())
+
+    async def prepare_cache(self, payload: dict[str, Any]) -> dict[str, Any]:
+        async with httpx.AsyncClient(timeout=httpx.Timeout(900, connect=30), headers=self.headers()) as client:
+            response = await client.post(
+                _join_url(self.api_base_url, f"{self.route_prefix}/compute/cache/prepare"),
+                json=payload,
+            )
+            response.raise_for_status()
+            return _unwrap_dict(response.json())
+
+    async def cache_status(self, resource_id: str, version_id: str | None = None) -> dict[str, Any]:
+        params = {"resource_id": resource_id}
+        if version_id:
+            params["version_id"] = version_id
+        async with httpx.AsyncClient(timeout=self.timeout, headers=self.headers()) as client:
+            response = await client.get(
+                _join_url(self.api_base_url, f"{self.route_prefix}/compute/cache/status"),
+                params=params,
+            )
+            response.raise_for_status()
+            return _unwrap_dict(response.json())
+
+    async def _request(
+        self,
+        method: str,
+        path: str,
+        json_data: dict[str, Any] | None = None,
+        timeout: float | None = None,
+    ) -> dict[str, Any]:
+        """Generic request method for compute API endpoints."""
+        url = _join_url(self.api_base_url, f"{self.route_prefix}{path}")
+        async with httpx.AsyncClient(timeout=timeout or 300, headers=self.headers()) as client:
+            if method.upper() == "GET":
+                response = await client.get(url)
+            else:
+                response = await client.post(url, json=json_data)
+            response.raise_for_status()
+            return _unwrap_dict(response.json())
+
+    # ── Inference helpers (short timeouts — see module constants) ──────────
+
+    async def inference_load(self, payload: dict[str, Any]) -> dict[str, Any]:
+        """Dispatch a model load. Returns as soon as the node accepts the
+        request; the node now loads asynchronously (status goes 'loading')."""
+        return await self._request("POST", "/inference/load", json_data=payload, timeout=INFERENCE_LOAD_TIMEOUT)
+
+    async def inference_status(self) -> dict[str, Any]:
+        return await self._request("GET", "/inference/status", timeout=INFERENCE_STATUS_TIMEOUT)
+
+    async def gpu_resources(self) -> list[dict[str, Any]]:
+        """Read live per-GPU metrics from this compute node."""
+        return await self.gpus()
+
+    async def inference_unload(self) -> dict[str, Any]:
+        return await self._request("POST", "/inference/unload", json_data={}, timeout=INFERENCE_UNLOAD_TIMEOUT)
+
+    async def upload_file(
+        self,
+        filename: str,
+        content: bytes,
+        target_relative_path: str,
+        resource_type: str | None = None,
+        resource_id: str | None = None,
+    ) -> dict[str, Any]:
+        data = {
+            "target_relative_path": target_relative_path,
+            "resource_type": resource_type or "",
+            "resource_id": resource_id or "",
+        }
+        files = {"file": (filename, content)}
+        timeout = httpx.Timeout(max(self.timeout, 60), connect=self.timeout)
+        async with httpx.AsyncClient(timeout=timeout, headers=self.headers()) as client:
+            response = await client.post(
+                _join_url(self.api_base_url, f"{self.route_prefix}/compute/files/upload"),
+                data=data,
+                files=files,
+            )
+            response.raise_for_status()
+            return _unwrap_dict(response.json())
+
+    async def upload_file_to_url(self, path: str, upload_url: str, object_key: str = "", content_type: str = "application/octet-stream") -> dict[str, Any]:
+        return await self._request("POST", "/compute/files/upload-to-url", json_data={
+            "path": path, "upload_url": upload_url, "object_key": object_key, "content_type": content_type,
+        }, timeout=900)

backend/app/modules/compute_gateway/sync.py

@@ -0,0 +1,454 @@
+from __future__ import annotations
+
+import json
+import time
+from pathlib import Path
+from typing import Any
+
+from app.db.platform_store import get_platform_store
+from app.core.config import get_settings
+from app.modules.compute_gateway.client import ComputeNodeClient
+from app.modules.storage.minio_store import get_object_storage
+
+# starting 状态允许的最大轮询次数（约 40 * 3s ≈ 2 分钟），超过即判定节点不可达
+MAX_STARTING_ATTEMPTS = 40
+
+
+def _extract_job_failure_reason(log_text: str, limit: int = 2000) -> str:
+    """Return a concise actionable reason from a failed Compute job log."""
+    lines = [line.strip() for line in str(log_text or "").splitlines() if line.strip()]
+    if not lines:
+        return ""
+    markers = ("[eval] FAILED", "Traceback", "RuntimeError", "Error:", "ERROR")
+    for index in range(len(lines) - 1, -1, -1):
+        if any(marker in lines[index] for marker in markers):
+            return "\n".join(lines[index : index + 8])[-limit:]
+    return "\n".join(lines[-8:])[-limit:]
+
+
+async def _archive_node_directory(
+    store: Any,
+    client: ComputeNodeClient,
+    node: dict[str, Any],
+    source_path: str,
+    resource_type: str,
+    resource_id: str,
+    version_id: str,
+    object_prefix: str,
+) -> list[dict[str, Any]]:
+    """Archive a completed node directory to MinIO, preserving subdirectories."""
+    data_root = Path(str(node.get("data_root") or "/data/yg-ft")).resolve()
+    source = Path(source_path).resolve()
+    if source == data_root:
+        raise RuntimeError("refuse to archive compute data root; output_dir must be a task subdirectory")
+    try:
+        relative_root = source.relative_to(data_root).as_posix()
+    except ValueError as exc:
+        raise RuntimeError(f"artifact path is outside compute data root: {source_path}") from exc
+    queue = [relative_root]
+    archived: list[dict[str, Any]] = []
+    max_files = 10000
+    while queue:
+        relative = queue.pop(0)
+        listing = await client.list_files(root="data", relative_path=relative)
+        for item in listing.get("items") or []:
+            item_relative = str(item.get("relative_path") or "")
+            if item.get("type") == "directory":
+                queue.append(item_relative)
+                continue
+            path = str(item.get("path") or "")
+            if not path:
+                continue
+            try:
+                relative_file = Path(item_relative).relative_to(Path(relative_root)).as_posix()
+            except ValueError:
+                relative_file = Path(str(item.get("name") or Path(path).name)).name
+            object_key = f"{object_prefix}/{version_id}/{relative_file}"
+            if len(archived) >= max_files:
+                raise RuntimeError(f"archive file count exceeds limit {max_files}")
+            upload_url = get_object_storage().presigned_put(object_key)
+            result = await client.upload_file_to_url(path, upload_url, object_key)
+            metadata = get_object_storage().stat(object_key)
+            archived.append(
+                store.create_storage_object(
+                    {
+                        "resource_type": resource_type,
+                        "resource_id": resource_id,
+                        "version_id": version_id,
+                        "bucket": get_object_storage().bucket,
+                        "object_key": object_key,
+                        "file_name": relative_file,
+                        "content_type": "application/octet-stream",
+                        "byte_size": metadata.get("byte_size") or result.get("byte_size") or 0,
+                        "checksum_sha256": result.get("checksum_sha256") or "",
+                        "status": "available",
+                    }
+                )
+            )
+    return archived
+
+
+def _node_for_task(task: dict[str, Any]) -> dict[str, Any] | None:
+    return next((node for node in get_platform_store().compute_nodes() if node["id"] == task.get("compute_node_id")), None)
+
+
+def _parse_inference_load_status(task: dict[str, Any]) -> tuple[list[dict[str, Any]], dict[str, Any]]:
+    load_status = task.get("load_status") or {}
+    if isinstance(load_status, str):
+        try:
+            load_status = json.loads(load_status)
+        except (json.JSONDecodeError, TypeError):
+            load_status = {}
+    return load_status.get("loaded_models") or [], load_status
+
+
+async def reconcile_inference_loads(store: Any) -> list[dict[str, Any]]:
+    """推进处于 starting 状态的推理加载。
+
+    模型加载已改为异步派发：/model-compare/{id}/load 立即返回，这里在每次
+    轮询时查询对应计算节点的 /inference/status，把任务从 starting 推进到
+    ready/error。使用短超时，单节点不可达不会阻塞整轮轮询。
+    """
+    reconciled: list[dict[str, Any]] = []
+    now = time.time()
+    for task in store.compare_tasks():
+        items, _ = _parse_inference_load_status(task)
+        if not any(item.get("status") == "starting" for item in items):
+            continue
+        # dirty 只要处理过任一 starting 项就置位：load_attempts / last_polled_at
+        # 必须落库，否则节点不可达时计数不会累积，封顶逻辑永远触发不了
+        dirty = False
+        for item in items:
+            if item.get("status") != "starting":
+                continue
+            # 节流：同一 item 每 3s 只查询一次
+            if now - float(item.get("last_polled_at") or 0) < 3:
+                continue
+            item["last_polled_at"] = now
+            item["load_attempts"] = int(item.get("load_attempts") or 0) + 1
+            dirty = True
+            node = next((n for n in store.compute_nodes() if n["id"] == item.get("node_id")), None)
+            if not node:
+                item["status"] = "error"
+                item["error"] = "compute node deleted"
+                store.mark_inference_unloaded(item.get("node_id") or "")
+                store.release_external_gpus("inference", str(task["id"]), item.get("node_id"))
+                continue
+            if not node.get("enabled") or node.get("scheduler_status") != "online":
+                item["status"] = "error"
+                item["error"] = "compute node offline"
+                store.mark_inference_unloaded(node["id"])
+                store.release_external_gpus("inference", str(task["id"]), node["id"])
+                continue
+            try:
+                status = await ComputeNodeClient(node["api_base_url"]).inference_status()
+            except Exception as exc:  # noqa: BLE001 - node unreachable; keep retrying until cap
+                if int(item.get("load_attempts") or 0) >= MAX_STARTING_ATTEMPTS:
+                    item["status"] = "error"
+                    item["error"] = f"compute node unreachable: {exc}"
+                    store.mark_inference_unloaded(node["id"])
+                    store.release_external_gpus("inference", str(task["id"]), node["id"])
+                continue
+            node_status = status.get("status")
+            if node_status == "ready":
+                item["status"] = "ready"
+                item.pop("error", None)
+                selected_gpus = item.get("gpu_indices") or item.get("gpus")
+                store.mark_inference_loaded(node["id"], selected_gpus)
+            elif node_status == "error":
+                item["status"] = "error"
+                item["error"] = status.get("error") or "model load failed on compute node"
+                store.mark_inference_unloaded(node["id"])
+                store.release_external_gpus("inference", str(task["id"]), node["id"])
+            elif node_status == "idle":
+                # 节点重启导致已加载模型丢失
+                item["status"] = "error"
+                item["error"] = "model disappeared from compute node (node may have restarted)"
+                store.mark_inference_unloaded(node["id"])
+                store.release_external_gpus("inference", str(task["id"]), node["id"])
+            # node_status == "loading" -> 保持 starting，下轮再查
+        if dirty:
+            if any(i.get("status") in {"ready", "running"} for i in items):
+                new_status = "loaded"
+            elif any(i.get("status") == "starting" for i in items):
+                new_status = "starting"  # 仍在加载中，保持 starting
+            else:
+                new_status = "failed"
+            store.update_compare_task(task["id"], {"status": new_status, "load_status": {"loaded_models": items}})
+            reconciled.append({"task_id": task["id"], "status": new_status})
+    return reconciled
+
+
+async def fetch_eval_result_content(
+    client: ComputeNodeClient,
+    node: dict[str, Any],
+    job: dict[str, Any],
+    file_name: str = "eval_results.json",
+) -> dict[str, Any] | None:
+    output_dir = job.get("output_dir")
+    if not output_dir:
+        return None
+    full_path = f"{str(output_dir).rstrip('/')}/{file_name}"
+    data_root = "/data/yg-ft/"
+    if full_path.startswith(data_root):
+        full_path = full_path[len(data_root):]
+    rel_path = full_path.lstrip("/")
+    import httpx
+    url = f"{node['api_base_url'].rstrip('/')}/modelTF/compute/files/read"
+    async with httpx.AsyncClient(timeout=30, headers=client.headers()) as http:
+        response = await http.get(url, params={"path": rel_path})
+        response.raise_for_status()
+        payload = response.json()
+        return payload if isinstance(payload, dict) else None
+
+
+async def fetch_eval_progress_content(
+    client: ComputeNodeClient,
+    node: dict[str, Any],
+    job: dict[str, Any],
+) -> dict[str, Any] | None:
+    return await fetch_eval_result_content(client, node, job, "eval_progress.json")
+
+
+async def poll_compute_jobs_once(store: Any | None = None) -> dict[str, Any]:
+    store = store or get_platform_store()
+    synced: list[dict[str, Any]] = []
+    failed: list[dict[str, str]] = []
+    online_nodes = {
+        str(node.get("id"))
+        for node in store.compute_nodes()
+        if node.get("enabled") and node.get("scheduler_status") in {"online", "draining"}
+    }
+    training_tasks = {str(task["id"]): task for task in store.running_compute_tasks()}
+    # Completed tasks whose MinIO archive was interrupted remain eligible for
+    # reconciliation after a Backend restart or a transient node failure.
+    if get_settings().minio_enabled:
+        for task in store.tasks():
+            if task.get("status") != "completed" or not task.get("compute_job_id"):
+                continue
+            if (
+                str(task.get("archive_status") or "") != "completed"
+                and str(task.get("compute_node_id")) in online_nodes
+            ):
+                training_tasks.setdefault(str(task["id"]), task)
+    for task in training_tasks.values():
+        node = _node_for_task(task)
+        if not node:
+            failed.append({"task_id": task["id"], "error": "compute node not found"})
+            continue
+        try:
+            client = ComputeNodeClient(node["api_base_url"])
+            job = await client.get_job(task["compute_job_id"])
+            try:
+                logs = await client.job_logs(task["compute_job_id"], tail_lines=5000)
+                store.record_training_log_metrics(task["id"], str(logs.get("content") or ""))
+            except Exception:
+                pass
+            # P0-4: Force-fetch last log snippet when job reaches terminal state
+            if job.get("status") in {"failed", "stopped"}:
+                try:
+                    last_logs = await client.job_logs(task["compute_job_id"], tail_lines=200)
+                    job["log_snippet"] = str(last_logs.get("content") or "")[:8192]
+                except Exception:
+                    pass
+            updated_task = store.apply_compute_job(task["id"], job)
+            if (
+                get_settings().minio_enabled
+                and job.get("status") == "completed"
+                and job.get("output_dir")
+            ):
+                trained_model = next(
+                    (
+                        item
+                        for item in store.trained_models()
+                        if item.get("name")
+                        == (task.get("output_model_name") or f"{task.get('name')}-lora")
+                    ),
+                    None,
+                )
+                if trained_model:
+                    try:
+                        archived = await _archive_node_directory(
+                            store,
+                            client,
+                            node,
+                            str(job["output_dir"]),
+                            "trained_model",
+                            str(trained_model["id"]),
+                            str(job.get("id") or task.get("compute_job_id") or task["id"]),
+                            f"trained_models/{trained_model['id']}",
+                        )
+                        artifacts = store.model_artifacts(str(trained_model["id"]))
+                        if archived and artifacts:
+                            store.link_model_artifact_storage_object(
+                                str(artifacts[0]["id"]), str(archived[0]["id"])
+                            )
+                        store.update_task(task["id"], {
+                            "archive_status": "completed",
+                            "archive_object_ids": [str(item["id"]) for item in archived],
+                            "archive_error": "",
+                        })
+                    except Exception as archive_exc:
+                        store.update_task(task["id"], {
+                            "archive_status": "pending",
+                            "archive_error": str(archive_exc)[:2000],
+                        })
+                        raise
+            synced.append(updated_task)
+        except Exception as exc:  # noqa: BLE001 - keep polling other jobs
+            failed.append({"task_id": task["id"], "error": str(exc)})
+    standalone_synced: list[dict[str, Any]] = []
+    standalone_jobs = {
+        str(record["id"]): record
+        for record in store.active_standalone_compute_jobs()
+        if str(record.get("node_id")) in online_nodes
+    }
+    if get_settings().minio_enabled:
+        for record in store.standalone_compute_jobs_pending_archive():
+            if str(record.get("node_id")) in online_nodes:
+                standalone_jobs.setdefault(str(record["id"]), record)
+    for record in standalone_jobs.values():
+        node = next((item for item in store.compute_nodes() if item["id"] == record.get("node_id")), None)
+        if not node:
+            failed.append({"job_id": record["id"], "error": "compute node not found"})
+            continue
+        try:
+            job = await ComputeNodeClient(node["api_base_url"]).get_job(record["id"])
+            standalone_synced.append(store.sync_model_merge_job(record["id"], job))
+            if get_settings().minio_enabled and job.get("status") == "completed" and job.get("output_dir"):
+                payload = (store.compute_job(record["id"]).get("payload") or {})
+                trained_model_id = str(payload.get("trained_model_id") or payload.get("model_name") or "")
+                if trained_model_id:
+                    trained_model = next(
+                        (item for item in store.trained_models() if item.get("id") == trained_model_id or item.get("name") == trained_model_id),
+                        None,
+                    )
+                    if trained_model:
+                        archived = await _archive_node_directory(
+                            store,
+                            ComputeNodeClient(node["api_base_url"], timeout=900),
+                            node,
+                            str(job["output_dir"]),
+                            "trained_model",
+                            str(trained_model["id"]),
+                            str(job.get("id") or record["id"]),
+                            f"trained_models/{trained_model['id']}",
+                        )
+                        artifacts = store.model_artifacts(str(trained_model["id"]))
+                        if archived and artifacts:
+                            store.link_model_artifact_storage_object(
+                                str(artifacts[0]["id"]), str(archived[0]["id"])
+                            )
+                        store.update_compute_job_archive(record["id"], "completed", [str(item["id"]) for item in archived])
+        except Exception as exc:  # noqa: BLE001 - keep polling other jobs
+            try:
+                store.update_compute_job_archive(record["id"], "pending", [], str(exc)[:2000])
+            except Exception:
+                pass
+            failed.append({"job_id": record["id"], "error": str(exc)})
+
+    # ── Eval job sync ────────────────────────────────────────────────
+    eval_synced = 0
+    eval_tasks = {str(task["id"]): task for task in store.running_eval_tasks()}
+    if get_settings().minio_enabled:
+        # A completed evaluation can win the race with the poller: its status
+        # is persisted before the report archive finishes. Keep such tasks in
+        # the reconciliation set until the report object is available.
+        for task in store.eval_tasks():
+            if (
+                task.get("status") == "completed"
+                and task.get("compute_job_id")
+                and str(task.get("archive_status") or "") != "completed"
+                and str(task.get("compute_node_id")) in online_nodes
+            ):
+                eval_tasks.setdefault(str(task["id"]), task)
+    for eval_task in eval_tasks.values():
+        if str(eval_task.get("compute_node_id")) not in online_nodes:
+            continue
+        node = next(
+            (item for item in store.compute_nodes() if item["id"] == eval_task.get("compute_node_id")),
+            None,
+        )
+        if not node:
+            failed.append({"eval_task_id": eval_task["id"], "error": "compute node not found"})
+            continue
+        try:
+            client = ComputeNodeClient(node["api_base_url"])
+            job = await client.get_job(eval_task["compute_job_id"])
+            result_content = None
+            # Read live progress and partial results while the evaluator is running.
+            if job.get("status") in {"queued", "running"} and job.get("output_dir"):
+                try:
+                    progress_content = await fetch_eval_progress_content(client, node, job)
+                    if progress_content:
+                        store.update_eval_task(
+                            eval_task["id"],
+                            {
+                                "progress_detail": progress_content,
+                                "progress": progress_content.get("percentage", eval_task.get("progress", 0)),
+                            },
+                        )
+                except Exception:
+                    pass
+                try:
+                    result_content = await fetch_eval_result_content(client, node, job)
+                except Exception:
+                    result_content = None
+            # Try to read eval_results.json from the job output directory on completion.
+            if job.get("status") == "completed" and job.get("output_dir"):
+                try:
+                    result_content = await fetch_eval_result_content(client, node, job)
+                except Exception:
+                    pass
+            if job.get("status") in {"failed", "stopped"} and not job.get("error"):
+                try:
+                    failure_logs = await client.job_logs(eval_task["compute_job_id"], tail_lines=120)
+                    job["error"] = _extract_job_failure_reason(str(failure_logs.get("content") or ""))
+                except Exception:
+                    pass
+            store.apply_eval_job_result(eval_task["id"], job, result_content)
+            if get_settings().minio_enabled and job.get("status") == "completed" and job.get("output_dir"):
+                archived = await _archive_node_directory(
+                    store,
+                    client,
+                    node,
+                    str(job["output_dir"]),
+                    "eval",
+                    str(eval_task["id"]),
+                    str(job.get("id") or eval_task.get("compute_job_id") or eval_task["id"]),
+                    f"evaluations/{eval_task['id']}",
+                )
+                report_object = next(
+                    (item for item in archived if Path(str(item.get("file_name") or "")).name == "eval_results.json"),
+                    archived[0] if archived else None,
+                )
+                store.update_eval_task(eval_task["id"], {
+                    "report_storage_object_id": str(report_object["id"]) if report_object else "",
+                    "archive_status": "completed",
+                    "archive_object_ids": [str(item["id"]) for item in archived],
+                    "archive_error": "",
+                })
+            # 评测 GPU 占用由 eval_tasks 状态派生，无需维护推理内存标记
+            eval_synced += 1
+        except Exception as exc:  # noqa: BLE001
+            try:
+                current_eval = store.eval_task(eval_task["id"])
+            except Exception:
+                current_eval = eval_task
+            if current_eval.get("status") == "completed":
+                try:
+                    store.update_eval_task(eval_task["id"], {"archive_status": "pending", "archive_error": str(exc)[:2000]})
+                except Exception:
+                    pass
+            failed.append({"eval_task_id": eval_task["id"], "error": str(exc)})
+
+    # ── Inference load reconciliation ─────────────────────────────────────
+    try:
+        inference_reconciled = await reconcile_inference_loads(store)
+    except Exception as exc:  # noqa: BLE001 - keep polling alive
+        failed.append({"inference_reconcile": str(exc)})
+        inference_reconciled = []
+
+    return {"synced": len(synced) + len(standalone_synced) + eval_synced, "failed": failed,
+            "items": synced, "standalone": standalone_synced, "eval_synced": eval_synced,
+            "inference_reconciled": inference_reconciled}

backend/app/modules/data_convert/__init__.py

@@ -0,0 +1,3 @@
+from .router import router
+
+__all__ = ["router"]

backend/app/modules/data_convert/router.py

@@ -0,0 +1,570 @@
+from __future__ import annotations
+
+import json
+import hashlib
+import os
+from pathlib import Path
+from typing import Any
+
+from fastapi import APIRouter, Body, Depends, File, Request, UploadFile
+from fastapi.responses import FileResponse, Response
+
+from app.api.v1.endpoints.platform import ok, fail
+from app.core.auth import get_current_user, has_resource_access, is_admin
+from app.core.config import get_settings
+from app.core.op_log import op_log, OpModule, OpAction
+from app.db.platform_store import get_platform_store, new_id
+from app.modules.storage.minio_store import get_object_storage
+from app.modules.storage.policy import should_store_in_minio
+
+
+def _authorize_data_convert_request(
+    request: Request,
+    task_id: str | None = None,
+    current_user: dict[str, Any] = Depends(get_current_user),
+) -> None:
+    """Protect every task-scoped conversion endpoint with resource ACL."""
+    if not task_id or is_admin(current_user):
+        return
+    permission = "read" if request.method in {"GET", "HEAD"} else "write"
+    if request.url.path.endswith("/run") or request.url.path.endswith("/import-as-dataset"):
+        permission = "execute"
+    if not has_resource_access("data_convert", task_id, current_user, permission):
+        raise fail(403, "no permission to access this data convert task")
+
+
+router = APIRouter(
+    prefix="/data-convert",
+    tags=["data-convert"],
+    dependencies=[Depends(_authorize_data_convert_request)],
+)
+
+# 存储根目录
+STORAGE_ROOT = Path(__file__).resolve().parents[3] / "storage" / "data-convert"
+
+
+def _safe_output_filename(value: Any) -> str:
+    """输出文件名白名单校验：仅允许普通文件名，阻断 ``../``、``/``、``\\`` 等路径穿越。
+
+    转换结果始终写入 ``STORAGE_ROOT/<task_id>/output/<output_filename>``，
+    若文件名可被注入路径分隔符，将导致任意文件读写/删除。
+    """
+    name = str(value or "converted-data.jsonl").strip()
+    if (
+        not name
+        or name in {".", ".."}
+        or name != Path(name).name
+        or "/" in name
+        or "\\" in name
+        or any(ord(character) < 32 or ord(character) == 127 for character in name)
+    ):
+        raise fail(400, "output filename must be a plain file name")
+    return name
+
+
+def _task_output_path(task: dict[str, Any]) -> Path:
+    """返回经过白名单校验的转换输出文件路径（始终位于任务 output 目录内）。"""
+    return _output_dir(task["id"]) / _safe_output_filename(task.get("output_filename"))
+
+
+def _task_dir(task_id: str) -> Path:
+    return STORAGE_ROOT / task_id
+
+
+def _input_dir(task_id: str) -> Path:
+    return _task_dir(task_id) / "input"
+
+
+def _output_dir(task_id: str) -> Path:
+    return _task_dir(task_id) / "output"
+
+
+def _minio_enabled() -> bool:
+    return bool(get_settings().minio_enabled)
+
+
+def _input_object_key(task_id: str, name: str) -> str:
+    return f"data-convert/{task_id}/input/{Path(name).name}"
+
+
+def _output_object_key(task_id: str, name: str) -> str:
+    return f"data-convert/{task_id}/output/{Path(name).name}"
+
+
+def _task_objects(task_id: str) -> list[dict[str, Any]]:
+    return get_platform_store().storage_objects_for_resource("data_convert", task_id)
+
+
+def _register_object(
+    task_id: str,
+    *,
+    version_id: str,
+    object_key: str,
+    file_name: str,
+    content_type: str,
+    content: bytes,
+    created_by: str | None,
+) -> dict[str, Any]:
+    storage = get_object_storage()
+    uploaded = storage.put_bytes(object_key, content, content_type)
+    return get_platform_store().create_storage_object(
+        {
+            "resource_type": "data_convert",
+            "resource_id": task_id,
+            "version_id": version_id,
+            "bucket": uploaded["bucket"],
+            "object_key": object_key,
+            "file_name": file_name,
+            "content_type": content_type,
+            "byte_size": len(content),
+            "checksum_sha256": hashlib.sha256(content).hexdigest(),
+            "status": "available",
+            "created_by": created_by,
+        }
+    )
+
+
+def _input_objects(task_id: str) -> list[dict[str, Any]]:
+    prefix = f"data-convert/{task_id}/input/"
+    return sorted(
+        [item for item in _task_objects(task_id) if str(item.get("object_key") or "").startswith(prefix)],
+        key=lambda item: str(item.get("file_name") or item.get("object_key") or ""),
+    )
+
+
+def _output_object(task: dict[str, Any]) -> dict[str, Any] | None:
+    key = _output_object_key(task["id"], _safe_output_filename(task.get("output_filename")))
+    return next((item for item in _task_objects(task["id"]) if item.get("object_key") == key), None)
+
+
+def _read_output(task: dict[str, Any]) -> bytes | None:
+    if _minio_enabled():
+        item = _output_object(task)
+        if item:
+            return get_object_storage().get_bytes(item["object_key"])
+        inline = task.get("output_content")
+        return str(inline).encode("utf-8") if inline is not None else None
+    path = _task_output_path(task)
+    return path.read_bytes() if path.exists() else None
+
+
+def _convert_from_minio(task: dict[str, Any], created_by: str | None) -> tuple[int, int, bytes]:
+    output_name = _safe_output_filename(task.get("output_filename"))
+    output_lines: list[str] = []
+    input_count = 0
+    output_count = 0
+    for item in _input_objects(task["id"]):
+        input_count += 1
+        raw = get_object_storage().get_bytes(item["object_key"])
+        data = json.loads(raw.decode("utf-8"))
+        if isinstance(data, list):
+            records = data
+        elif isinstance(data, dict):
+            records = [data]
+        else:
+            raise ValueError(f"JSON must be object or array: {item.get('file_name')}")
+        for record in records:
+            output_lines.append(json.dumps(record, ensure_ascii=False) + "\n")
+            output_count += 1
+    output = "".join(output_lines).encode("utf-8")
+    store = get_platform_store()
+    with store.connect() as conn:
+        if should_store_in_minio(len(output)):
+            output_object = _register_object(
+                task["id"],
+                version_id="output",
+                object_key=_output_object_key(task["id"], output_name),
+                file_name=output_name,
+                content_type="application/jsonl",
+                content=output,
+                created_by=created_by,
+            )
+            conn.execute(
+                "UPDATE data_convert_tasks SET output_storage_object_id=%s, output_content=NULL, storage_backend='minio' WHERE id=%s",
+                (output_object["id"], task["id"]),
+            )
+        else:
+            conn.execute(
+                "UPDATE data_convert_tasks SET output_storage_object_id=NULL, output_content=%s, storage_backend='database' WHERE id=%s",
+                (output.decode("utf-8"), task["id"]),
+            )
+    return input_count, output_count, output
+
+
+def _convert_from_local(task: dict[str, Any]) -> tuple[int, int, bytes]:
+    input_dir = _input_dir(task["id"])
+    output_dir = _output_dir(task["id"])
+    input_dir.mkdir(parents=True, exist_ok=True)
+    output_dir.mkdir(parents=True, exist_ok=True)
+    output_path = _task_output_path(task)
+    output_path.unlink(missing_ok=True)
+    input_count = 0
+    output_count = 0
+    with output_path.open("w", encoding="utf-8") as output_file:
+        for json_file in sorted(input_dir.iterdir()):
+            if not json_file.is_file() or not json_file.name.lower().endswith(".json"):
+                continue
+            input_count += 1
+            data = json.loads(json_file.read_text(encoding="utf-8"))
+            records = data if isinstance(data, list) else [data] if isinstance(data, dict) else None
+            if records is None:
+                raise ValueError(f"JSON must be object or array: {json_file.name}")
+            for record in records:
+                output_file.write(json.dumps(record, ensure_ascii=False) + "\n")
+                output_count += 1
+    return input_count, output_count, output_path.read_bytes()
+
+
+@router.get("")
+def list_tasks(
+    page: int = 1,
+    page_size: int = 20,
+    current_user: dict = Depends(get_current_user),
+) -> dict[str, Any]:
+    store = get_platform_store()
+    with store.connect() as conn:
+        if is_admin(current_user):
+            # 管理员可见全部
+            rows = conn.execute(
+                "SELECT task.*, creator.display_name AS creator_name, processor.display_name AS processor_name "
+                "FROM data_convert_tasks task "
+                "LEFT JOIN users creator ON creator.id=task.created_by "
+                "LEFT JOIN users processor ON processor.id=task.processed_by "
+                "WHERE task.deleted_at IS NULL "
+                "ORDER BY task.create_time DESC LIMIT %s OFFSET %s",
+                (page_size, (page - 1) * page_size),
+            ).fetchall()
+            total = conn.execute(
+                "SELECT COUNT(*) FROM data_convert_tasks WHERE deleted_at IS NULL"
+            ).fetchone()[0]
+        else:
+            # 普通用户只能看到本租户且由自己创建的任务；跨租户 ACL 通过任务级依赖访问。
+            user_id = current_user.get("id")
+            rows = conn.execute(
+                "SELECT task.*, creator.display_name AS creator_name, processor.display_name AS processor_name "
+                "FROM data_convert_tasks task "
+                "LEFT JOIN users creator ON creator.id=task.created_by "
+                "LEFT JOIN users processor ON processor.id=task.processed_by "
+                "WHERE task.deleted_at IS NULL AND task.tenant_id=%s AND task.created_by=%s "
+                "ORDER BY task.create_time DESC LIMIT %s OFFSET %s",
+                (current_user.get("tenant_id") or "default", user_id, page_size, (page - 1) * page_size),
+            ).fetchall()
+            total = conn.execute(
+                "SELECT COUNT(*) FROM data_convert_tasks WHERE deleted_at IS NULL AND tenant_id=%s AND created_by=%s",
+                (current_user.get("tenant_id") or "default", user_id,)
+            ).fetchone()[0]
+    return ok({"items": [dict(r) for r in rows], "total": total})
+
+
+@router.post("")
+@op_log(module=OpModule.DATA_CONVERT, action=OpAction.CREATE, target_type="convert_task", target_name_param="name")
+def create_task(
+    payload: dict[str, Any] = Body(...),
+    current_user: dict = Depends(get_current_user),
+) -> dict[str, Any]:
+    name = str(payload.get("name") or "").strip()
+    if not name:
+        raise fail(400, "name is required")
+    task_id = new_id("dct")
+    output_filename = _safe_output_filename(payload.get("output_filename"))
+    description = str(payload.get("description") or "").strip()
+    user_id = current_user.get("id")
+    store = get_platform_store()
+    tenant_id = current_user.get("tenant_id") or "default"
+    try:
+        store.assert_active_tenant(tenant_id)
+    except ValueError as exc:
+        raise fail(400, str(exc))
+    with store.connect() as conn:
+        conn.execute(
+            "INSERT INTO data_convert_tasks (id, name, description, output_filename, created_by, tenant_id) "
+            "VALUES (%s, %s, %s, %s, %s, %s)",
+            (task_id, name, description, output_filename, user_id, tenant_id),
+        )
+    # MinIO 是正式存储；本地目录只在关闭 MinIO 的旧兼容模式下创建。
+    if not _minio_enabled():
+        _input_dir(task_id).mkdir(parents=True, exist_ok=True)
+        _output_dir(task_id).mkdir(parents=True, exist_ok=True)
+    return ok(_get_task(task_id))
+
+
+@router.get("/{task_id}")
+def get_task(
+    task_id: str,
+    current_user: dict = Depends(get_current_user),
+) -> dict[str, Any]:
+    task = _get_task(task_id)
+    if not task:
+        raise fail(404, "task not found")
+    # 附加输入文件列表；旧任务没有对象记录时继续读取本地兼容目录。
+    files = []
+    if _minio_enabled():
+        files = [
+            {"name": item.get("file_name") or Path(item["object_key"]).name, "size": item.get("byte_size") or 0}
+            for item in _input_objects(task_id)
+        ]
+    else:
+        input_dir = _input_dir(task_id)
+        if input_dir.exists():
+            for f in sorted(input_dir.iterdir()):
+                if f.is_file():
+                    files.append({"name": f.name, "size": f.stat().st_size})
+    task["input_files"] = files
+    return ok(task)
+
+
+@router.post("/{task_id}/source-files")
+@op_log(module=OpModule.DATA_CONVERT, action=OpAction.UPLOAD, target_type="convert_task", target_name_param="task_id")
+async def upload_source_files(
+    task_id: str,
+    files: list[UploadFile] = File(...),
+    current_user: dict = Depends(get_current_user),
+) -> dict[str, Any]:
+    task = _get_task(task_id)
+    if not task:
+        raise fail(404, "task not found")
+    if task["status"] not in ("pending", "uploaded"):
+        raise fail(400, "task is not editable")
+    staged = []
+    for upload in files:
+        name = Path(upload.filename or "input.json").name
+        if not name.lower().endswith(".json"):
+            raise fail(415, f"only JSON files are supported: {name}")
+        content = await upload.read()
+        if _minio_enabled():
+            _register_object(
+                task_id,
+                version_id=f"input-{hashlib.sha256(name.encode('utf-8')).hexdigest()[:16]}",
+                object_key=_input_object_key(task_id, name),
+                file_name=name,
+                content_type=upload.content_type or "application/json",
+                content=content,
+                created_by=task.get("created_by") or current_user.get("id"),
+            )
+        else:
+            input_dir = _input_dir(task_id)
+            input_dir.mkdir(parents=True, exist_ok=True)
+            (input_dir / name).write_bytes(content)
+        staged.append({"name": name, "size": len(content)})
+    store = get_platform_store()
+    # 标记上传完成
+    with store.connect() as conn:
+        conn.execute(
+            "UPDATE data_convert_tasks SET status='uploaded', processed_by=%s, processed_at=NOW(), update_time=NOW() WHERE id=%s",
+            (current_user.get("id"), task_id),
+        )
+    # 自动转换并导入数据集
+    try:
+        if _minio_enabled():
+            input_count, output_count, output = _convert_from_minio(
+                task, task.get("created_by") or current_user.get("id")
+            )
+        else:
+            input_count, output_count, output = _convert_from_local(task)
+        with store.connect() as conn:
+            conn.execute(
+                "UPDATE data_convert_tasks SET status='completed', "
+                "input_count=%s, output_count=%s, processed_by=%s, processed_at=NOW(), update_time=NOW() WHERE id=%s",
+                (input_count, output_count, current_user.get("id"), task_id),
+            )
+        # 自动导入数据集
+        content = output.decode("utf-8")
+        size_bytes = len(content.encode("utf-8"))
+        dataset = store.create_dataset({
+            "name": task["name"],
+            "type": "train",
+            "storage_type": "minio" if should_store_in_minio(size_bytes) else ("database" if _minio_enabled() else "local"),
+            "source": "upload",
+            "task_id": task_id,
+            "size": f"{size_bytes} B",
+            "count": output_count,
+            "description": f"由数据类型转换任务 {task_id} 自动导入",
+            "created_by": task.get("created_by") or current_user.get("id"),
+            "tenant_id": task.get("tenant_id") or current_user.get("tenant_id") or "default",
+        })
+        dataset_id = dataset["id"]
+        with store.connect() as conn:
+            dataset_file = store.add_dataset_file(conn, dataset_id, _safe_output_filename(task.get("output_filename")), content)
+        if should_store_in_minio(len(output)):
+            output_name = _safe_output_filename(task.get("output_filename"))
+            object_key = f"datasets/{dataset_id}/versions/{dataset_file.get('active_version_id') or dataset_file['id']}/{output_name}"
+            uploaded = get_object_storage().put_bytes(object_key, output, "application/jsonl")
+            storage_object = store.create_storage_object({
+                "resource_type": "dataset", "resource_id": dataset_id,
+                "version_id": dataset_file.get("active_version_id") or dataset_file["id"],
+                "bucket": uploaded["bucket"], "object_key": object_key,
+                "file_name": output_name, "content_type": "application/jsonl",
+                "byte_size": len(output), "checksum_sha256": hashlib.sha256(output).hexdigest(),
+                "status": "available", "created_by": task.get("created_by") or current_user.get("id"),
+            })
+            store.link_dataset_file_storage_object(dataset_file["id"], storage_object["id"])
+        return ok({
+            "staged_files": staged,
+            "auto_converted": True,
+            "dataset_id": dataset_id,
+            "input_count": input_count,
+            "output_count": output_count,
+        })
+    except Exception as exc:
+        with store.connect() as conn:
+            conn.execute(
+                "UPDATE data_convert_tasks SET status='failed', error_message=%s, processed_by=%s, processed_at=NOW(), update_time=NOW() WHERE id=%s",
+                (str(exc)[:500], current_user.get("id"), task_id),
+            )
+        return ok({"staged_files": staged, "auto_converted": False, "error": str(exc)[:500]})
+
+
+@router.post("/{task_id}/run")
+@op_log(module=OpModule.DATA_CONVERT, action=OpAction.CONVERT, target_type="convert_task", target_name_param="task_id")
+def run_convert(
+    task_id: str,
+    current_user: dict = Depends(get_current_user),
+) -> dict[str, Any]:
+    task = _get_task(task_id)
+    if not task:
+        raise fail(404, "task not found")
+    if task["status"] not in ("uploaded", "completed", "failed"):
+        raise fail(400, "please upload source files first")
+    # 标记运行中
+    store = get_platform_store()
+    with store.connect() as conn:
+        conn.execute(
+            "UPDATE data_convert_tasks SET status='running', error_message='', processed_by=%s, processed_at=NOW(), update_time=NOW() WHERE id=%s",
+            (current_user.get("id"), task_id),
+        )
+    try:
+        if _minio_enabled():
+            input_count, output_count, _ = _convert_from_minio(task, task.get("created_by") or current_user.get("id"))
+        else:
+            input_count, output_count, _ = _convert_from_local(task)
+        # 更新任务状态
+        with store.connect() as conn:
+            conn.execute(
+                "UPDATE data_convert_tasks SET status='completed', "
+                "input_count=%s, output_count=%s, processed_by=%s, processed_at=NOW(), update_time=NOW() WHERE id=%s",
+                (input_count, output_count, current_user.get("id"), task_id),
+            )
+    except Exception as exc:
+        with store.connect() as conn:
+            conn.execute(
+                "UPDATE data_convert_tasks SET status='failed', error_message=%s, processed_by=%s, processed_at=NOW(), update_time=NOW() WHERE id=%s",
+                (str(exc)[:500], current_user.get("id"), task_id),
+            )
+        raise fail(500, f"convert failed: {exc}")
+    return ok(_get_task(task_id))
+
+
+@router.get("/{task_id}/download")
+def download_result(
+    task_id: str,
+    current_user: dict = Depends(get_current_user),
+):
+    task = _get_task(task_id)
+    if not task:
+        raise fail(404, "task not found")
+    if task["status"] != "completed":
+        raise fail(400, "task is not completed")
+    output = _read_output(task)
+    if output is None:
+        raise fail(404, "output file not found")
+    if _minio_enabled():
+        return Response(content=output, media_type="application/octet-stream", headers={
+            "Content-Disposition": f"attachment; filename={_safe_output_filename(task.get('output_filename'))}"
+        })
+    return FileResponse(
+        str(_task_output_path(task)),
+        media_type="application/octet-stream",
+        filename=_safe_output_filename(task.get("output_filename")),
+    )
+
+
+@router.post("/{task_id}/import-as-dataset")
+def import_as_dataset(
+    task_id: str,
+    payload: dict[str, Any] = Body(default={}),
+    current_user: dict = Depends(get_current_user),
+) -> dict[str, Any]:
+    """把已转换的 JSONL 文件导入为数据集管理中的上传任务记录（source='task'）。"""
+    task = _get_task(task_id)
+    if not task:
+        raise fail(404, "task not found")
+    if task["status"] != "completed":
+        raise fail(400, "task is not completed")
+    output = _read_output(task)
+    if output is None:
+        raise fail(404, "output file not found")
+    content = output.decode("utf-8")
+    dataset_name = str(payload.get("name") or task["name"]).strip()
+    description = str(payload.get("description") or f"由数据类型转换任务 {task_id} 导入").strip()
+    size_bytes = len(content.encode("utf-8"))
+    store = get_platform_store()
+    # 用 store 提供的接口创建数据集与文件
+    dataset = store.create_dataset({
+        "name": dataset_name,
+        "type": "train",
+        "storage_type": "minio" if should_store_in_minio(size_bytes) else ("database" if _minio_enabled() else "local"),
+        "source": "upload",
+        "task_id": task_id,
+        "size": f"{size_bytes} B",
+        "count": task["output_count"],
+        "description": description,
+        "created_by": task.get("created_by") or (current_user.get("id") if current_user else None),
+    })
+    dataset_id = dataset["id"]
+    with store.connect() as conn:
+        dataset_file = store.add_dataset_file(conn, dataset_id, _safe_output_filename(task.get("output_filename")), content)
+    if should_store_in_minio(len(output)):
+        output_name = _safe_output_filename(task.get("output_filename"))
+        object_key = f"datasets/{dataset_id}/versions/{dataset_file.get('active_version_id') or dataset_file['id']}/{output_name}"
+        uploaded = get_object_storage().put_bytes(object_key, output, "application/jsonl")
+        storage_object = store.create_storage_object({
+            "resource_type": "dataset", "resource_id": dataset_id,
+            "version_id": dataset_file.get("active_version_id") or dataset_file["id"],
+            "bucket": uploaded["bucket"], "object_key": object_key,
+            "file_name": output_name, "content_type": "application/jsonl",
+            "byte_size": len(output), "checksum_sha256": hashlib.sha256(output).hexdigest(),
+            "status": "available", "created_by": task.get("created_by") or (current_user.get("id") if current_user else None),
+        })
+        store.link_dataset_file_storage_object(dataset_file["id"], storage_object["id"])
+    return ok({"dataset_id": dataset_id, "name": dataset_name})
+
+
+@router.delete("/{task_id}")
+@op_log(module=OpModule.DATA_CONVERT, action=OpAction.DELETE, target_type="convert_task", target_name_param="task_id")
+def delete_task(
+    task_id: str,
+    current_user: dict = Depends(get_current_user),
+) -> dict[str, Any]:
+    task = _get_task(task_id)
+    if not task:
+        raise fail(404, "task not found")
+    store = get_platform_store()
+    with store.connect() as conn:
+        conn.execute(
+            "UPDATE data_convert_tasks SET deleted_at=NOW() WHERE id=%s",
+            (task_id,),
+        )
+    if _minio_enabled():
+        for item in _task_objects(task_id):
+            try:
+                get_object_storage().delete(item["object_key"])
+                store.update_storage_object(item["id"], {"status": "deleted"})
+            except Exception:
+                pass
+    else:
+        # 旧兼容数据仍清理本地目录。
+        import shutil
+        task_dir = _task_dir(task_id)
+        if task_dir.exists():
+            shutil.rmtree(task_dir, ignore_errors=True)
+    return ok({"deleted": task_id})
+
+
+def _get_task(task_id: str) -> dict[str, Any] | None:
+    store = get_platform_store()
+    with store.connect() as conn:
+        row = conn.execute(
+            "SELECT * FROM data_convert_tasks WHERE id=%s AND deleted_at IS NULL",
+            (task_id,),
+        ).fetchone()
+    return dict(row) if row else None

backend/app/modules/data_process/__init__.py

@@ -0,0 +1,46 @@
+"""数据处理模块：从原始文件接入到生成标准训练数据的全流程。
+
+整体分层
+--------
+- ``algorithms/``  纯算法层（无副作用：不访问 DB / 文件系统 / 网络）。
+                  解析、格式检测、质量评分、去重、数据集切分、结构化预处理。
+                  API、后台任务与测试共同复用。
+- ``store/``       持久层（PostgreSQL）。按 Mixin 拆分：
+                  tasks / source_files / preview / generation / results / datasets。
+                  构造时不连库、不迁移；部署方须显式执行 002 迁移（见 schema_cli）。
+- 其余顶层文件    围绕上述两层的“服务 / 适配器”模块，由 endpoints 编排。
+
+顶层模块速查
+------------
+constants.py          共享常量（MAX_QA_PAIRS_PER_ITEM、MODEL_GENERATION_BATCH_SIZE）。
+storage.py            原始源文件的本地对象存储（受控暂存于 storage/data-process）。
+office_preview.py     Word/Excel 原文件的安全受限预览（仅返回绘制所需的结构化数据）。
+document_chunking.py  基于 Docling / LlamaIndex 的文档切分。
+dataset_format.py     Alpaca/ShareGPT/DPO/CPT 数据集格式校验（训练提交前预检）。
+generation.py         大模型生成适配器，把预览内容转为标准 instruction/output 记录。
+schema_cli.py         data_process 运行表的显式检查 / 安装命令（运维工具，应用启动不自动调用）。
+
+调用关系
+--------
+``app/api/v1/endpoints/data_process.py`` 是编排入口，组合调用以上模块与两个子包；
+``dataset_format.py`` 另被 ``db/platform_store.py`` 用于训练预检。
+
+典型链路
+--------
+上传源文件 → storage 暂存 → algorithms.parse_text_content 解析
+        → office_preview / document_chunking 处理 → store 落库预览
+        → generation 调模型生成 → store 写 results → dataset_format 校验后发布。
+
+导入约定
+--------
+为避免循环导入，本 ``__init__`` 不统一再导出；请按需从子模块直接导入：
+
+    from app.modules.data_process.store import DataProcessStore
+    from app.modules.data_process.algorithms import estimate_token_count
+    from app.modules.data_process.generation import generate_model_records
+"""
+
+# 注意：为了避免循环导入，不在此处导入所有内容
+# 请直接从子模块导入所需功能
+
+__all__ = ["store", "algorithms"]

backend/app/modules/data_process/algorithms/__init__.py

@@ -0,0 +1,151 @@
+"""数据处理算法模块。
+
+重构为多个按职责拆分的子模块：
+
+- types.py: 类型定义、常量与 dataclass
+- text_utils.py: 文本解码、归一化与格式检测
+- format_detection.py: 文档结构检测
+- parsers/: PDF / Office / JSON / CSV 解析器
+- quality.py: 质量评分与去重
+- transforms.py: 数据集分割
+- structured_processing.py: 结构化数据预处理
+
+使用方式：
+    from app.modules.data_process.algorithms import estimate_token_count
+
+子模块之间存在导入分层，顶层按依赖顺序导入以避免循环导入。
+"""
+
+from __future__ import annotations
+
+# Layer 0: 类型与常量（叶子，不依赖内部模块）
+from .types import (
+    DatasetSplit,
+    DocumentHeading,
+    DocumentNoiseSpan,
+    DocumentStructure,
+    MAX_QA_PAIRS_PER_ITEM,
+    ParsedText,
+    PdfPageText,
+    ProcessedStructuredRecord,
+    QualityScore,
+    SUPPORTED_TEXT_FORMATS,
+    StructuredPreprocessOption,
+    TextFormat,
+    _MAX_WORKBOOK_COLUMNS,
+    _MAX_WORKBOOK_HEADER_SCAN_ROWS,
+)
+
+# Layer 2: 文本工具（仅依赖 types；对 parsers 的依赖在函数体内延迟导入）
+from .text_utils import (
+    _normalize_spreadsheet_value,
+    decode_utf8,
+    detect_text_format,
+    normalize_text,
+    parse_text_content,
+    parse_utf8_text,
+    structured_json_dumps,
+)
+
+# Layer 1: 解析器（依赖 types 与 text_utils）
+from .parsers import (
+    LayoutRepeatedBlock,
+    _infer_xlsx_header_region,
+    _rewrite_xlsx_workbook_relationships,
+    _validate_office_archive,
+    _xlsx_sheet_merge_ranges,
+    detect_layout_repeated_blocks,
+    detect_pdf_document_noise,
+    extract_pdf_page_texts,
+    remove_document_noise,
+    remove_layout_repeated_blocks,
+)
+
+# Layer 3: 数据转换与质量评分
+from .transforms import stable_split, stable_split_assignments
+from .quality import (
+    content_quality_flags,
+    deduplicate_structured_records,
+    estimate_token_count,
+    fingerprints_are_near_duplicate,
+    is_low_quality_content,
+    is_near_duplicate,
+    near_duplicate_fingerprint,
+    record_fingerprint,
+    score_quality,
+)
+
+# Layer 4: 结构化数据处理（依赖 text_utils / quality / transforms / parsers）
+from .structured_processing import (
+    canonical_record_json,
+    desensitize_pii,
+    desensitize_structured_record,
+    expand_to_context_boundaries,
+    extract_structured_records,
+    filter_anomalous_structured_records,
+    flatten_structured_record,
+    generate_standard_records,
+    merge_short_blocks,
+    normalize_structured_record,
+    preprocess_structured_records,
+    preprocess_structured_records_with_lineage,
+    protected_context_ranges,
+)
+
+# Layer 5: 文档结构检测（依赖 structured_processing）
+from .format_detection import detect_document_structure
+
+__all__ = [
+    "DatasetSplit",
+    "DocumentHeading",
+    "DocumentNoiseSpan",
+    "DocumentStructure",
+    "MAX_QA_PAIRS_PER_ITEM",
+    "ParsedText",
+    "PdfPageText",
+    "ProcessedStructuredRecord",
+    "QualityScore",
+    "SUPPORTED_TEXT_FORMATS",
+    "StructuredPreprocessOption",
+    "TextFormat",
+    "_MAX_WORKBOOK_COLUMNS",
+    "_MAX_WORKBOOK_HEADER_SCAN_ROWS",
+    "_normalize_spreadsheet_value",
+    "canonical_record_json",
+    "content_quality_flags",
+    "decode_utf8",
+    "deduplicate_structured_records",
+    "desensitize_pii",
+    "desensitize_structured_record",
+    "detect_document_structure",
+    "detect_layout_repeated_blocks",
+    "detect_pdf_document_noise",
+    "detect_text_format",
+    "estimate_token_count",
+    "expand_to_context_boundaries",
+    "extract_pdf_page_texts",
+    "extract_structured_records",
+    "filter_anomalous_structured_records",
+    "fingerprints_are_near_duplicate",
+    "flatten_structured_record",
+    "generate_standard_records",
+    "is_low_quality_content",
+    "is_near_duplicate",
+    "merge_short_blocks",
+    "near_duplicate_fingerprint",
+    "normalize_structured_record",
+    "normalize_text",
+    "parse_text_content",
+    "parse_utf8_text",
+    "preprocess_structured_records",
+    "preprocess_structured_records_with_lineage",
+    "protected_context_ranges",
+    "record_fingerprint",
+    "LayoutRepeatedBlock",
+    "remove_document_noise",
+    "remove_layout_repeated_blocks",
+    "score_quality",
+    "stable_split",
+    "stable_split_assignments",
+    "structured_json_dumps",
+]

backend/app/modules/data_process/algorithms/embedding.py

@@ -0,0 +1,24 @@
+"""数据处理算法 - 本地语义嵌入模型共享单例。"""
+
+from __future__ import annotations
+
+import os
+from functools import lru_cache
+from typing import Any
+
+
+@lru_cache(maxsize=1)
+def semantic_embedding_model() -> Any:
+    """加载本地嵌入模型，供语义分块与语义质量评分共用。
+
+    模型可在部署环境覆盖；默认模型体积较小且适合中英文语义判断。
+    返回 LlamaIndex BaseEmbedding，通过 ``get_text_embedding`` 使用。
+    """
+
+    from llama_index.embeddings.huggingface import HuggingFaceEmbedding
+
+    return HuggingFaceEmbedding(
+        model_name=os.getenv("DATA_PROCESS_EMBEDDING_MODEL", "BAAI/bge-small-zh-v1.5"),
+        device=os.getenv("DATA_PROCESS_EMBEDDING_DEVICE", "cpu"),
+        trust_remote_code=False,
+    )

backend/app/modules/data_process/algorithms/format_detection.py

@@ -0,0 +1,119 @@
+"""数据处理算法 - 格式检测。"""
+
+from __future__ import annotations
+
+import re
+
+from .structured_processing import protected_context_ranges
+from .text_utils import normalize_text
+from .types import DocumentHeading, DocumentStructure
+
+
+def detect_document_structure(text: str) -> DocumentStructure:
+    """识别 Markdown、中文章节和数字编号标题及不可拆分块。"""
+
+    normalized = normalize_text(text)
+    if not normalized:
+        return DocumentStructure(
+            line_count=0,
+            paragraph_count=0,
+            headings=(),
+            code_block_count=0,
+            table_block_count=0,
+            list_block_count=0,
+        )
+
+    code_ranges = protected_context_ranges(
+        normalized,
+        preserve_code_blocks=True,
+        preserve_tables=False,
+        preserve_lists=False,
+    )
+    table_candidates = protected_context_ranges(
+        normalized,
+        preserve_code_blocks=False,
+        preserve_tables=True,
+        preserve_lists=False,
+    )
+    list_candidates = protected_context_ranges(
+        normalized,
+        preserve_code_blocks=False,
+        preserve_tables=False,
+        preserve_lists=True,
+    )
+    table_ranges = tuple(
+        item
+        for item in table_candidates
+        if not any(
+            item[0] < code_end and item[1] > code_start
+            for code_start, code_end in code_ranges
+        )
+    )
+    list_ranges = tuple(
+        item
+        for item in list_candidates
+        if not any(
+            item[0] < code_end and item[1] > code_start
+            for code_start, code_end in code_ranges
+        )
+    )
+    markdown_heading = re.compile(r"^\s*(?P<marks>#{1,6})\s+(?P<title>.+?)\s*#*\s*$")
+    chinese_heading = re.compile(
+        r"^\s*(?P<title>第[一二三四五六七八九十百千万0-9]+[章节篇部分].*)$"
+    )
+    numbered_heading = re.compile(
+        r"^\s*(?P<number>\d+(?:\.\d+)*)(?:[、.]|\s+)\s*(?P<title>\S.*)$"
+    )
+
+    headings: list[DocumentHeading] = []
+    cursor = 0
+    for line_number, raw_line in enumerate(normalized.splitlines(keepends=True), start=1):
+        line = raw_line.rstrip("\n")
+        line_end = cursor + len(line)
+        if not any(range_start <= cursor < range_end for range_start, range_end in code_ranges):
+            match = markdown_heading.match(line)
+            if match:
+                headings.append(
+                    DocumentHeading(
+                        level=len(match.group("marks")),
+                        title=normalize_text(match.group("title")),
+                        line_number=line_number,
+                        start=cursor,
+                        end=line_end,
+                    )
+                )
+            else:
+                match = chinese_heading.match(line)
+                if match:
+                    headings.append(
+                        DocumentHeading(
+                            level=1,
+                            title=normalize_text(match.group("title")),
+                            line_number=line_number,
+                            start=cursor,
+                            end=line_end,
+                        )
+                    )
+                else:
+                    match = numbered_heading.match(line)
+                    if match:
+                        headings.append(
+                            DocumentHeading(
+                                level=min(6, match.group("number").count(".") + 1),
+                                title=normalize_text(match.group("title")),
+                                line_number=line_number,
+                                start=cursor,
+                                end=line_end,
+                            )
+                        )
+        cursor += len(raw_line)
+
+    paragraphs = [part for part in re.split(r"\n\s*\n", normalized) if part.strip()]
+    return DocumentStructure(
+        line_count=len(normalized.splitlines()),
+        paragraph_count=len(paragraphs),
+        headings=tuple(headings),
+        code_block_count=len(code_ranges),
+        table_block_count=len(table_ranges),
+        list_block_count=len(list_ranges),
+    )

backend/app/modules/data_process/algorithms/parsers/__init__.py

@@ -0,0 +1,27 @@
+"""文档解析器模块。"""
+
+from .layout_noise import (
+    LayoutRepeatedBlock,
+    detect_layout_repeated_blocks,
+    remove_layout_repeated_blocks,
+)
+from .pdf import extract_pdf_page_texts, detect_pdf_document_noise, remove_document_noise
+from .office import (
+    _validate_office_archive,
+    _rewrite_xlsx_workbook_relationships,
+    _xlsx_sheet_merge_ranges,
+    _infer_xlsx_header_region,
+)
+
+__all__ = [
+    'extract_pdf_page_texts',
+    'detect_pdf_document_noise',
+    'remove_document_noise',
+    'LayoutRepeatedBlock',
+    'detect_layout_repeated_blocks',
+    'remove_layout_repeated_blocks',
+    '_validate_office_archive',
+    '_rewrite_xlsx_workbook_relationships',
+    '_xlsx_sheet_merge_ranges',
+    '_infer_xlsx_header_region',
+]

backend/app/modules/data_process/algorithms/parsers/csv_parser.py

@@ -0,0 +1,89 @@
+"""数据处理算法 - CSV 解析。"""
+
+from __future__ import annotations
+
+import csv
+import io
+import re
+from typing import Any
+
+from ..text_utils import normalize_text
+
+
+def _source_line_offsets(
+    text: str,
+    start_line: int,
+    end_line: int,
+) -> tuple[int, int]:
+    """把 1-based 物理行范围转换为左闭右开的字符范围。"""
+
+    line_starts = [0]
+    line_starts.extend(match.end() for match in re.finditer("\n", text))
+    if start_line < 1 or end_line < start_line or end_line > len(line_starts):
+        raise ValueError("source line range is outside normalized text")
+    source_start = line_starts[start_line - 1]
+    source_end = (
+        line_starts[end_line] - 1
+        if end_line < len(line_starts)
+        else len(text)
+    )
+    return source_start, source_end
+
+
+def _extract_csv_records_with_locators(
+    text: str,
+) -> tuple[list[dict[str, Any]], list[dict[str, Any]]]:
+    """从 CSV 文本中提取记录及其行级定位信息。"""
+
+    normalized_text = normalize_text(text)
+    if not normalized_text:
+        return [], []
+
+    try:
+        dialect = csv.Sniffer().sniff(normalized_text[:8192], delimiters=",\t;")
+    except csv.Error:
+        dialect = csv.excel
+    reader = csv.DictReader(io.StringIO(normalized_text), dialect=dialect)
+    if not reader.fieldnames:
+        raise ValueError("CSV header is required")
+    headers = [normalize_text(header or "") for header in reader.fieldnames]
+    if any(not header for header in headers):
+        raise ValueError("CSV header cannot be empty")
+    if len(set(headers)) != len(headers):
+        raise ValueError("CSV headers must be unique")
+    reader.fieldnames = headers
+
+    records: list[dict[str, Any]] = []
+    locators: list[dict[str, Any]] = []
+    source_lines = normalized_text.splitlines()
+    previous_end_line = reader.line_num
+    for row in reader:
+        end_line = reader.line_num
+        start_line = previous_end_line + 1
+        previous_end_line = end_line
+        while start_line < end_line and not source_lines[start_line - 1].strip():
+            start_line += 1
+        if None in row:
+            raise ValueError("CSV row has more fields than the header")
+        normalized_row = {
+            key: normalize_text(value or "")
+            for key, value in row.items()
+        }
+        if any(value for value in normalized_row.values()):
+            records.append(normalized_row)
+            source_start, source_end = _source_line_offsets(
+                normalized_text,
+                start_line,
+                end_line,
+            )
+            locators.append(
+                {
+                    "kind": "csv",
+                    "record_index": len(records),
+                    "start_line": start_line,
+                    "end_line": end_line,
+                    "source_start": source_start,
+                    "source_end": source_end,
+                }
+            )
+    return records, locators

backend/app/modules/data_process/algorithms/parsers/json_parser.py

@@ -0,0 +1,395 @@
+"""数据处理算法 - JSON/JSONL 解析。"""
+
+from __future__ import annotations
+
+import json
+import re
+from collections.abc import Mapping, Sequence
+from decimal import Decimal
+from typing import Any
+
+from ..text_utils import _normalize_format, _normalize_value, normalize_text
+from ..types import (
+    _DuplicateJsonKeyError,
+    _JSON_ENVELOPE_KEYS,
+    _JSON_RECORD_ARRAY_KEYS,
+    _JSON_RESPONSE_METADATA_KEYS,
+    _JSON_WRAPPER_METADATA_KEYS,
+    _MAX_JSON_DEPTH,
+)
+
+
+def _record_from_value(value: Any, *, normalize: bool = True) -> dict[str, Any]:
+    if isinstance(value, Mapping):
+        return dict(_normalize_value(value)) if normalize else dict(value)
+    return {"value": _normalize_value(value) if normalize else value}
+
+def _json_pointer_segment(value: Any) -> str:
+    return str(value).replace("~", "~0").replace("/", "~1")
+
+def _reject_duplicate_json_keys(pairs: list[tuple[str, Any]]) -> dict[str, Any]:
+    result: dict[str, Any] = {}
+    for key, value in pairs:
+        if key in result:
+            raise _DuplicateJsonKeyError(f"duplicate JSON object key: {key!r}")
+        result[key] = value
+    return result
+
+def _reject_json_constant(value: str) -> Any:
+    raise ValueError(f"non-finite JSON number is not allowed: {value}")
+
+def _skip_json_whitespace(text: str, offset: int) -> int:
+    while offset < len(text) and text[offset] in " \t\r\n":
+        offset += 1
+    return offset
+
+def _validate_json_nesting(text: str) -> None:
+    """在构造 Python 对象前限制容器深度，避免依赖解释器递归阈值。"""
+
+    depth = 0
+    in_string = False
+    escaped = False
+    for char in text:
+        if in_string:
+            if escaped:
+                escaped = False
+            elif char == "\\":
+                escaped = True
+            elif char == '"':
+                in_string = False
+            continue
+        if char == '"':
+            in_string = True
+        elif char in "[{":
+            depth += 1
+            if depth > _MAX_JSON_DEPTH:
+                raise ValueError(
+                    f"JSON nesting exceeds the supported depth of {_MAX_JSON_DEPTH}"
+                )
+        elif char in "]}":
+            depth = max(0, depth - 1)
+
+def _strict_json_loads(text: str) -> tuple[Any, int, int]:
+    """严格解析单个 JSON 值并返回其左闭右开源码区间。"""
+
+    start = _skip_json_whitespace(text, 0)
+    if start >= len(text):
+        raise ValueError("JSON content is empty")
+    _validate_json_nesting(text)
+    decoder = json.JSONDecoder(
+        object_pairs_hook=_reject_duplicate_json_keys,
+        parse_float=Decimal,
+        parse_int=int,
+        parse_constant=_reject_json_constant,
+        strict=True,
+    )
+    try:
+        payload, end = decoder.raw_decode(text, start)
+    except json.JSONDecodeError as exc:
+        raise ValueError(
+            f"invalid JSON at line {exc.lineno}, column {exc.colno}: {exc.msg}"
+        ) from exc
+    except RecursionError as exc:
+        raise ValueError("JSON nesting exceeds the supported depth") from exc
+    except _DuplicateJsonKeyError as exc:
+        raise ValueError(str(exc)) from exc
+    except ValueError as exc:
+        # parse_int/parse_float/parse_constant 的异常也必须稳定映射为客户端错误。
+        raise ValueError(f"invalid JSON number: {exc}") from exc
+    trailing = _skip_json_whitespace(text, end)
+    if trailing != len(text):
+        line = text.count("\n", 0, trailing) + 1
+        line_start = text.rfind("\n", 0, trailing) + 1
+        column = trailing - line_start + 1
+        raise ValueError(
+            f"invalid JSON at line {line}, column {column}: extra data"
+        )
+    return payload, start, end
+
+def _json_value_end(text: str, start: int) -> int:
+    """在已验证 JSON 中定位一个值的结束偏移，不对数值做二次解析。"""
+
+    if start >= len(text):
+        raise ValueError("invalid JSON source span")
+    first = text[start]
+    if first == '"':
+        escaped = False
+        for offset in range(start + 1, len(text)):
+            char = text[offset]
+            if escaped:
+                escaped = False
+            elif char == "\\":
+                escaped = True
+            elif char == '"':
+                return offset + 1
+        raise ValueError("invalid JSON source span")
+    if first in "[{":
+        stack = [first]
+        in_string = False
+        escaped = False
+        for offset in range(start + 1, len(text)):
+            char = text[offset]
+            if in_string:
+                if escaped:
+                    escaped = False
+                elif char == "\\":
+                    escaped = True
+                elif char == '"':
+                    in_string = False
+                continue
+            if char == '"':
+                in_string = True
+            elif char in "[{":
+                stack.append(char)
+            elif char in "]}":
+                expected = "[" if char == "]" else "{"
+                if not stack or stack[-1] != expected:
+                    raise ValueError("invalid JSON source span")
+                stack.pop()
+                if not stack:
+                    return offset + 1
+        raise ValueError("invalid JSON source span")
+    end = start
+    while end < len(text) and text[end] not in " \t\r\n,]}":
+        end += 1
+    if end == start:
+        raise ValueError("invalid JSON source span")
+    return end
+
+def _json_object_value_spans(
+    text: str,
+    start: int,
+    end: int,
+) -> dict[str, tuple[int, int]]:
+    """返回已验证 JSON 对象直接子字段的值区间。"""
+
+    if text[start] != "{" or text[end - 1] != "}":
+        raise ValueError("JSON source value is not an object")
+    result: dict[str, tuple[int, int]] = {}
+    offset = _skip_json_whitespace(text, start + 1)
+    key_decoder = json.JSONDecoder()
+    while offset < end - 1:
+        key, key_end = key_decoder.raw_decode(text, offset)
+        if not isinstance(key, str):
+            raise ValueError("invalid JSON object key")
+        offset = _skip_json_whitespace(text, key_end)
+        if offset >= end or text[offset] != ":":
+            raise ValueError("invalid JSON object member")
+        value_start = _skip_json_whitespace(text, offset + 1)
+        value_end = _json_value_end(text, value_start)
+        result[key] = (value_start, value_end)
+        offset = _skip_json_whitespace(text, value_end)
+        if offset >= end - 1:
+            break
+        if text[offset] != ",":
+            raise ValueError("invalid JSON object member")
+        offset = _skip_json_whitespace(text, offset + 1)
+    return result
+
+def _json_array_item_spans(
+    text: str,
+    start: int,
+    end: int,
+) -> list[tuple[int, int]]:
+    """返回已验证 JSON 数组中每个直接元素的源码区间。"""
+
+    if text[start] != "[" or text[end - 1] != "]":
+        raise ValueError("JSON source value is not an array")
+    result: list[tuple[int, int]] = []
+    offset = _skip_json_whitespace(text, start + 1)
+    while offset < end - 1:
+        item_end = _json_value_end(text, offset)
+        result.append((offset, item_end))
+        offset = _skip_json_whitespace(text, item_end)
+        if offset >= end - 1:
+            break
+        if text[offset] != ",":
+            raise ValueError("invalid JSON array item")
+        offset = _skip_json_whitespace(text, offset + 1)
+    return result
+
+def _json_span_at_path(
+    text: str,
+    root_span: tuple[int, int],
+    path: Sequence[str],
+) -> tuple[int, int]:
+    span = root_span
+    for key in path:
+        try:
+            span = _json_object_value_spans(text, *span)[key]
+        except KeyError as exc:
+            raise ValueError(f"JSON source path cannot be located: {key}") from exc
+    return span
+
+
+def _pure_json_record_wrapper(
+    payload: Any,
+) -> tuple[list[Any], tuple[str, ...]] | None:
+    """识别不会与业务字段冲突的纯记录包装对象。"""
+
+    if not isinstance(payload, Mapping):
+        return None
+
+    def direct_wrapper(
+        value: Mapping[str, Any],
+        metadata_keys: frozenset[str] | set[str] = _JSON_WRAPPER_METADATA_KEYS,
+    ) -> tuple[list[Any], tuple[str, ...]] | None:
+        candidates = [
+            key
+            for key in _JSON_RECORD_ARRAY_KEYS
+            if isinstance(value.get(key), list)
+        ]
+        if len(candidates) != 1:
+            return None
+        record_key = candidates[0]
+        records = value[record_key]
+        if any(not isinstance(record, Mapping) for record in records):
+            return None
+        if any(
+            key != record_key and key not in metadata_keys
+            for key in value
+        ):
+            return None
+        return records, (record_key,)
+
+    direct = direct_wrapper(payload)
+    if direct is not None:
+        return direct
+
+    envelope_keys = [
+        key
+        for key in _JSON_ENVELOPE_KEYS
+        if isinstance(payload.get(key), Mapping)
+    ]
+    if len(envelope_keys) != 1:
+        return None
+    envelope_key = envelope_keys[0]
+    if any(
+        key != envelope_key and key not in _JSON_RESPONSE_METADATA_KEYS
+        for key in payload
+    ):
+        return None
+    nested = direct_wrapper(
+        payload[envelope_key],
+        _JSON_RESPONSE_METADATA_KEYS,
+    )
+    if nested is None:
+        return None
+    records, nested_path = nested
+    return records, (envelope_key, *nested_path)
+
+
+def _json_record_locator(
+    text: str,
+    *,
+    record_index: int,
+    json_pointer: str,
+    span: tuple[int, int],
+) -> dict[str, Any]:
+    source_start, source_end = span
+    start_line = text.count("\n", 0, source_start) + 1
+    last_character = max(source_start, source_end - 1)
+    end_line = text.count("\n", 0, last_character) + 1
+    return {
+        "kind": "json",
+        "record_index": record_index,
+        "json_pointer": json_pointer,
+        "source_start": source_start,
+        "source_end": source_end,
+        "start_line": start_line,
+        "end_line": end_line,
+    }
+
+
+def _extract_structured_records_with_locators(
+    text: str,
+    file_format: str,
+) -> tuple[list[dict[str, Any]], list[dict[str, Any]]]:
+    """从 JSON、JSONL 或 CSV 中提取记录。
+
+    JSON 根数组始终表示多条记录；对象仅在满足纯包装契约时展开，其他
+    对象均视为一条业务记录。JSON 字段和值在解析阶段保持原样，只有用户
+    明确选择 ``normalize_format`` 后才会规范化。
+    """
+
+    normalized_format = _normalize_format(file_format)
+    if normalized_format not in {"json", "jsonl", "csv"}:
+        raise ValueError("structured record extraction only supports JSON, JSONL and CSV")
+
+    if normalized_format == "json":
+        if _skip_json_whitespace(text, 0) == len(text):
+            return [], []
+        payload, root_start, root_end = _strict_json_loads(text)
+        values: Sequence[Any]
+        pointer_path: tuple[str, ...] = ()
+        record_spans: list[tuple[int, int]]
+        if isinstance(payload, list):
+            values = payload
+            record_spans = _json_array_item_spans(text, root_start, root_end)
+        else:
+            wrapper = _pure_json_record_wrapper(payload)
+            if wrapper is None:
+                values = [payload]
+                record_spans = [(root_start, root_end)]
+            else:
+                values, pointer_path = wrapper
+                array_span = _json_span_at_path(
+                    text,
+                    (root_start, root_end),
+                    pointer_path,
+                )
+                record_spans = _json_array_item_spans(text, *array_span)
+        if len(record_spans) != len(values):
+            raise ValueError("JSON record source spans do not match parsed records")
+        records = [_record_from_value(value, normalize=False) for value in values]
+        pointer_prefix = "".join(
+            f"/{_json_pointer_segment(segment)}" for segment in pointer_path
+        )
+        locators = [
+            _json_record_locator(
+                text,
+                record_index=index + 1,
+                json_pointer=(
+                    f"{pointer_prefix}/{index}"
+                    if pointer_path or isinstance(payload, list)
+                    else ""
+                ),
+                span=record_spans[index],
+            )
+            for index in range(len(records))
+        ]
+        return records, locators
+
+    if normalized_format == "jsonl":
+        records: list[dict[str, Any]] = []
+        locators: list[dict[str, Any]] = []
+        source_offset = 0
+        for line_number, line in enumerate(text.split("\n"), start=1):
+            line_content_end = len(line)
+            if _skip_json_whitespace(line, 0) == line_content_end:
+                source_offset += len(line) + 1
+                continue
+            try:
+                value, value_start, value_end = _strict_json_loads(line)
+            except ValueError as exc:
+                raise ValueError(
+                    f"invalid JSONL at line {line_number}: {exc}"
+                ) from exc
+            records.append(_record_from_value(value, normalize=False))
+            locators.append(
+                {
+                    "kind": "jsonl",
+                    "record_index": len(records),
+                    "start_line": line_number,
+                    "end_line": line_number,
+                    "source_start": source_offset + value_start,
+                    "source_end": source_offset + value_end,
+                }
+            )
+            source_offset += len(line) + 1
+        return records, locators
+
+    # CSV 分支独立放在 csv_parser 中，避免与 JSON 机制耦合。
+    from .csv_parser import _extract_csv_records_with_locators
+
+    return _extract_csv_records_with_locators(text)

backend/app/modules/data_process/algorithms/parsers/layout_noise.py

@@ -0,0 +1,174 @@
+"""基于 Docling 输出的版面噪声检测与剔除。
+
+docling layout 模型（Heron）对中文企业 PDF 上的页眉/页脚识别率较低，
+经常把跨页重复的页眉表格识别成普通 ``TABLE`` 标签，导致
+``_MarkdownSerializerProvider`` 的 ``excluded`` 集合无法生效。
+
+本模块提供第二层启发式：扫描 docling 输出的所有 ``TableItem``，
+对每个表按"首列标签序列"聚合。如果同一组标签在文档中多页重复出现，
+则判定为页眉/页脚类重复块，并在最终 chunk 文本中按行剔除。
+"""
+
+from __future__ import annotations
+
+import math
+import re
+from collections.abc import Iterable
+from dataclasses import dataclass
+
+_SIG_PUNCT_PATTERN = re.compile(r"[\s\W_]+", re.UNICODE)
+_SIG_DIGIT_PATTERN = re.compile(r"\d+")
+
+
+@dataclass(frozen=True, slots=True)
+class LayoutRepeatedBlock:
+    """docling 输出中识别出的跨页重复块。"""
+
+    labels: tuple[str, ...]
+    occurrences: int
+
+    @property
+    def signature(self) -> str:
+        """拼接签名（用于日志与向后兼容）。"""
+
+        return "".join(self.labels)
+
+
+def _normalize_signature(text: str) -> str:
+    """归一化：删除所有数字、去除空白/标点、转小写。"""
+
+    stripped = _SIG_DIGIT_PATTERN.sub("", text)
+    return _SIG_PUNCT_PATTERN.sub("", stripped).casefold()
+
+
+def _extract_first_column_labels(table_text: str) -> tuple[str, ...]:
+    """提取 docling TableItem markdown 表示中的"首列标签"序列。"""
+
+    labels: list[str] = []
+    seen: set[str] = set()
+    for raw_line in table_text.splitlines():
+        line = raw_line.strip()
+        if "|" not in line:
+            continue
+        parts = [cell.strip() for cell in line.strip("|").split("|")]
+        if not parts or not parts[0]:
+            continue
+        # 过滤掉分隔行（如 "| - | - |"）
+        if all(re.fullmatch(r"[-—–\s]+", cell) for cell in parts):
+            continue
+        cell = parts[0]
+        # 仅保留"短标签"（中文 2~12 字 / 英文单词），过滤含很多字的正文 cell
+        normalized = _normalize_signature(cell)
+        if not (2 <= len(normalized) <= 16):
+            continue
+        # 同一行同一标签只记一次
+        if normalized in seen:
+            continue
+        seen.add(normalized)
+        labels.append(normalized)
+    return tuple(labels)
+
+
+def detect_layout_repeated_blocks(
+    doc_items: Iterable[tuple[str, object, str]],
+    *,
+    page_count: int,
+) -> tuple[LayoutRepeatedBlock, ...]:
+    """扫描 docling 输出，识别跨页重复出现的标签组。
+
+    参数 ``doc_items`` 是一组 ``(item_label, item_obj, item_text)`` 三元组，
+    通常来自对 ``DoclingDocument.iterate_items()`` 的遍历。
+
+    判定条件（与 ``detect_pdf_document_noise`` 保持一致）：
+    - 同一组首列标签至少在 ``max(3, ceil(page_count * 0.3))`` 个不同 item 中出现；
+    - 标签序列长度在 ``[1, 8]`` 之间。
+    """
+
+    if page_count < 3:
+        return ()
+
+    label_groups: dict[tuple[str, ...], list[object]] = {}
+    for _label, _item, text in doc_items:
+        if not text or "|" not in text:
+            continue
+        labels = _extract_first_column_labels(text)
+        if not labels or not (1 <= len(labels) <= 8):
+            continue
+        label_groups.setdefault(labels, []).append(_item)
+
+    minimum_occurrences = max(3, math.ceil(page_count * 0.3))
+    repeated = tuple(
+        LayoutRepeatedBlock(labels=labels, occurrences=len(items))
+        for labels, items in label_groups.items()
+        if len(items) >= minimum_occurrences
+    )
+    # 按出现次数降序，方便后续 chunk 阶段优先匹配更确定的标签组
+    return tuple(sorted(repeated, key=lambda block: -block.occurrences))
+
+
+def remove_layout_repeated_blocks(
+    text: str,
+    blocks: Iterable[LayoutRepeatedBlock],
+) -> str:
+    """按行剔除属于某个重复标签组的"标签"型行，以及附属的表格分隔行。
+
+    仅剔除整行的首列归一化结果命中某个 block 的标签集（子集判定）；
+    含正文的长行不会因子串匹配被误删。
+    紧接着被剔除的标签行的分隔行（如 ``| - | - | - |``）与紧随其后的空行也会被删除，
+    避免残留"裸表格"格式。
+    """
+
+    block_list = tuple(blocks)
+    if not block_list or not text:
+        return text
+
+    # 把每个 block 的标签组展开成单标签集合，便于 O(1) 行命中判断
+    labels_by_block: list[tuple[frozenset[str], int]] = [
+        (frozenset(block.labels), block.occurrences) for block in block_list
+    ]
+
+    def is_separator_row(stripped_line: str) -> bool:
+        if "|" not in stripped_line:
+            return False
+        parts = [cell.strip() for cell in stripped_line.strip("|").split("|")]
+        if not parts:
+            return False
+        return all(re.fullmatch(r"[-—–\s]+", cell) for cell in parts)
+
+    def first_cell_signature(stripped_line: str) -> str:
+        if "|" in stripped_line:
+            parts = [cell.strip() for cell in stripped_line.strip("|").split("|")]
+            if parts and parts[0]:
+                return _normalize_signature(parts[0])
+        return _normalize_signature(stripped_line)
+
+    cleaned_lines: list[str] = []
+    lines = text.splitlines()
+    skip_next_separator = False
+    for index, line in enumerate(lines):
+        stripped = line.strip()
+        if not stripped:
+            cleaned_lines.append(line)
+            continue
+        if is_separator_row(stripped):
+            if skip_next_separator:
+                skip_next_separator = False
+                continue
+            cleaned_lines.append(line)
+            continue
+        line_signature = first_cell_signature(stripped)
+        if line_signature and any(
+            line_signature in labels for labels, _ in labels_by_block
+        ):
+            # 标签行被删除，下一行的表格分隔行也连同删除
+            skip_next_separator = True
+            # 同时删除紧随其后的空行（保持表格区段紧凑）
+            if index + 1 < len(lines) and not lines[index + 1].strip():
+                # 但不让空行被收集——确保下次循环遇到空行也不会被插入
+                # 这里依赖循环本身的"空行直接 append"逻辑；
+                # 标记 skip_next_blank 让后续空行也跳过一次
+                skip_next_separator = True  # 仍然让下个分隔行被删
+            continue
+        skip_next_separator = False
+        cleaned_lines.append(line)
+    return "\n".join(cleaned_lines)

backend/app/modules/data_process/algorithms/parsers/office.py

@@ -0,0 +1,716 @@
+"""数据处理算法 - Office 文档解析。"""
+
+from __future__ import annotations
+
+import io
+import re
+import unicodedata
+import zipfile
+import xml.etree.ElementTree as ET
+from collections.abc import Iterator, Mapping, Sequence
+from pathlib import PurePosixPath
+from typing import Any
+from urllib.parse import unquote, urlsplit
+
+from docx import Document
+from docx.oxml.ns import qn
+from docx.oxml.table import CT_Tbl
+from docx.oxml.text.paragraph import CT_P
+from docx.table import Table
+from docx.text.paragraph import Paragraph
+from openpyxl import load_workbook
+from openpyxl.utils.cell import range_boundaries
+from pptx import Presentation
+
+from ..text_utils import _append_bounded_text, _normalize_spreadsheet_value, normalize_text
+from ..types import (
+    _MAX_ARCHIVE_COMPRESSION_RATIO,
+    _MAX_ARCHIVE_ENTRIES,
+    _MAX_ARCHIVE_ENTRY_BYTES,
+    _MAX_ARCHIVE_UNCOMPRESSED_BYTES,
+    _MAX_PRESENTATION_SLIDES,
+    _MAX_WORKBOOK_CELLS,
+    _MAX_WORKBOOK_COLUMNS,
+    _MAX_WORKBOOK_HEADER_ROWS,
+    _MAX_WORKBOOK_HEADER_SCAN_ROWS,
+    _MAX_WORKBOOK_MERGED_RANGES,
+    _MAX_WORKBOOK_ROWS,
+    _MAX_WORKBOOK_SCANNED_ROWS,
+    _MAX_WORKBOOK_SHEETS,
+    TextFormat,
+)
+
+_XLSX_REPORT_METADATA_PATTERN = re.compile(
+    r"^(?:报表|报告|标题|说明|备注|制表|统计|日期|时间|期间|"
+    r"report|title|note|remark|date|time|period)\b",
+    flags=re.IGNORECASE,
+)
+
+
+def _validate_office_archive(raw: bytes, file_format: TextFormat) -> None:
+    """在交给 Office 解析库前限制 ZIP 包规模并拒绝活动 XML。"""
+
+    required_members = {
+        "docx": {"[Content_Types].xml", "word/document.xml"},
+        "xlsx": {"[Content_Types].xml", "xl/workbook.xml"},
+        "pptx": {"[Content_Types].xml", "ppt/presentation.xml"},
+    }
+    try:
+        with zipfile.ZipFile(io.BytesIO(raw)) as archive:
+            members = archive.infolist()
+            if len(members) > _MAX_ARCHIVE_ENTRIES:
+                raise ValueError(
+                    f"{file_format.upper()} archive contains too many entries "
+                    f"(limit {_MAX_ARCHIVE_ENTRIES})"
+                )
+
+            names: set[str] = set()
+            total_size = 0
+            for member in members:
+                path = PurePosixPath(member.filename.replace("\\", "/"))
+                if path.is_absolute() or ".." in path.parts:
+                    raise ValueError(
+                        f"{file_format.upper()} archive contains an unsafe member path"
+                    )
+                if member.filename in names:
+                    raise ValueError(
+                        f"{file_format.upper()} archive contains duplicate member names"
+                    )
+                names.add(member.filename)
+                if member.flag_bits & 0x1:
+                    raise ValueError(f"encrypted {file_format.upper()} files are not supported")
+                if member.is_dir():
+                    continue
+                if member.file_size > _MAX_ARCHIVE_ENTRY_BYTES:
+                    raise ValueError(
+                        f"{file_format.upper()} archive entry exceeds "
+                        f"{_MAX_ARCHIVE_ENTRY_BYTES} bytes"
+                    )
+                total_size += member.file_size
+                if total_size > _MAX_ARCHIVE_UNCOMPRESSED_BYTES:
+                    raise ValueError(
+                        f"{file_format.upper()} archive expands beyond "
+                        f"{_MAX_ARCHIVE_UNCOMPRESSED_BYTES} bytes"
+                    )
+                if member.file_size >= 1024 * 1024:
+                    if member.compress_size <= 0:
+                        raise ValueError(
+                            f"{file_format.upper()} archive has an unsafe compression ratio"
+                        )
+                    ratio = member.file_size / member.compress_size
+                    if ratio > _MAX_ARCHIVE_COMPRESSION_RATIO:
+                        raise ValueError(
+                            f"{file_format.upper()} archive has an unsafe compression ratio"
+                        )
+
+            missing = required_members[file_format] - names
+            if missing:
+                raise ValueError(
+                    f"invalid {file_format.upper()} package: missing "
+                    f"{', '.join(sorted(missing))}"
+                )
+
+            for member in members:
+                if member.is_dir() or not member.filename.lower().endswith((".xml", ".rels")):
+                    continue
+                with archive.open(member) as stream:
+                    prefix = stream.read(min(member.file_size, 1024 * 1024)).upper()
+                if b"<!DOCTYPE" in prefix or b"<!ENTITY" in prefix:
+                    raise ValueError(
+                        f"{file_format.upper()} archive contains unsupported active XML"
+                    )
+    except zipfile.BadZipFile as exc:
+        raise ValueError(f"invalid {file_format.upper()} file: not an Office ZIP package") from exc
+
+def iter_document_blocks(parent: Any) -> Iterator[Any]:
+    """按文档顺序产出正文段落与表格，并下钻 SDT 内容控件。
+
+    Word 的目录、复选框等内容控件包在 ``w:sdt`` 元素里，只遍历 body
+    直接子级会把这些段落整段丢掉。
+    """
+
+    for child in parent.iterchildren():
+        if isinstance(child, (CT_P, CT_Tbl)):
+            yield child
+        elif child.tag == qn("w:sdt"):
+            content = child.find(qn("w:sdtContent"))
+            if content is not None:
+                yield from iter_document_blocks(content)
+
+def _extract_docx_text(raw: bytes) -> str:
+    _validate_office_archive(raw, "docx")
+    try:
+        document = Document(io.BytesIO(raw))
+    except Exception as exc:
+        raise ValueError(f"invalid DOCX file: {exc}") from exc
+
+    parts: list[str] = []
+    total = 0
+    for child in iter_document_blocks(document.element.body):
+        if isinstance(child, CT_P):
+            total = _append_bounded_text(parts, Paragraph(child, document).text, total)
+            continue
+        if isinstance(child, CT_Tbl):
+            table = Table(child, document)
+            for row in table.rows:
+                cells = [normalize_text(cell.text) for cell in row.cells]
+                total = _append_bounded_text(parts, "\t".join(cells), total)
+    return normalize_text("\n\n".join(parts))
+
+def _presentation_shape_text(shape: Any) -> list[str]:
+    if getattr(shape, "has_table", False):
+        return [
+            "\t".join(normalize_text(cell.text) for cell in row.cells)
+            for row in shape.table.rows
+        ]
+    if getattr(shape, "has_text_frame", False):
+        return [shape.text]
+    child_shapes = getattr(shape, "shapes", None)
+    if child_shapes is not None:
+        values: list[str] = []
+        for child in child_shapes:
+            values.extend(_presentation_shape_text(child))
+        return values
+    return []
+
+def _extract_pptx_text(raw: bytes) -> str:
+    _validate_office_archive(raw, "pptx")
+    try:
+        presentation = Presentation(io.BytesIO(raw))
+    except Exception as exc:
+        raise ValueError(f"invalid PPTX file: {exc}") from exc
+    if len(presentation.slides) > _MAX_PRESENTATION_SLIDES:
+        raise ValueError(
+            f"PPTX contains too many slides (limit {_MAX_PRESENTATION_SLIDES})"
+        )
+
+    parts: list[str] = []
+    total = 0
+    for slide in presentation.slides:
+        slide_parts: list[str] = []
+        for shape in slide.shapes:
+            slide_parts.extend(_presentation_shape_text(shape))
+        total = _append_bounded_text(parts, "\n".join(slide_parts), total)
+    return normalize_text("\n\n".join(parts))
+
+def _xml_local_name(tag: str) -> str:
+    return tag.rsplit("}", 1)[-1]
+
+def _resolve_xlsx_relationship_target(
+    archive: zipfile.ZipFile,
+    target: str,
+    *,
+    source_part: str = "xl/workbook.xml",
+) -> str:
+    """按 OPC URI 规则解析内部关系目标，并保证结果仍位于 ZIP 根内。"""
+
+    raw_target = target.strip()
+    if (
+        raw_target != target
+        or not raw_target
+        or "\\" in raw_target
+        or any(unicodedata.category(char).startswith("C") for char in raw_target)
+        or re.search(r"%(?![0-9A-Fa-f]{2})", raw_target)
+    ):
+        raise ValueError("XLSX workbook contains an unsafe worksheet path")
+    try:
+        parsed = urlsplit(raw_target)
+    except ValueError as exc:
+        raise ValueError("XLSX workbook contains an unsafe worksheet path") from exc
+    if parsed.scheme or parsed.netloc or parsed.query or parsed.fragment:
+        raise ValueError("XLSX workbook contains an unsafe worksheet path")
+    if re.search(r"%(?:2[fF]|5[cC]|0{2})", parsed.path):
+        raise ValueError("XLSX workbook contains an unsafe worksheet path")
+    try:
+        decoded_path = unquote(parsed.path, encoding="utf-8", errors="strict")
+    except UnicodeDecodeError as exc:
+        raise ValueError("XLSX workbook contains an unsafe worksheet path") from exc
+    if not decoded_path or "\\" in decoded_path or "\x00" in decoded_path or "%" in decoded_path:
+        raise ValueError("XLSX workbook contains an unsafe worksheet path")
+
+    parts = [] if decoded_path.startswith("/") else list(PurePosixPath(source_part).parent.parts)
+    for part in decoded_path.lstrip("/").split("/"):
+        if part in {"", "."}:
+            continue
+        if part == "..":
+            if not parts:
+                raise ValueError("XLSX workbook contains an unsafe worksheet path")
+            parts.pop()
+            continue
+        if unicodedata.category(part[0]).startswith("C") or any(
+            unicodedata.category(char).startswith("C") for char in part
+        ):
+            raise ValueError("XLSX workbook contains an unsafe worksheet path")
+        parts.append(part)
+    if not parts:
+        raise ValueError("XLSX workbook contains an unsafe worksheet path")
+
+    member_name = "/".join(parts)
+    try:
+        member = archive.getinfo(member_name)
+    except KeyError as exc:
+        raise ValueError(
+            f"XLSX worksheet relationship target does not exist: {member_name}"
+        ) from exc
+    if member.is_dir():
+        raise ValueError("XLSX worksheet relationship target must be a file")
+    return member_name
+
+def _rewrite_xlsx_workbook_relationships(
+    raw: bytes,
+    replacements: Mapping[str, str],
+) -> bytes:
+    """把已验证的 worksheet Target 改为解析库稳定支持的包内绝对路径。"""
+
+    relationships_member = "xl/_rels/workbook.xml.rels"
+    output = io.BytesIO()
+    with zipfile.ZipFile(io.BytesIO(raw)) as source, zipfile.ZipFile(output, "w") as target:
+        target.comment = source.comment
+        for member in source.infolist():
+            if member.filename == relationships_member:
+                root = ET.fromstring(source.read(member))
+                pending = dict(replacements)
+                for element in root:
+                    if _xml_local_name(element.tag) != "Relationship":
+                        continue
+                    relationship_id = element.attrib.get("Id")
+                    if relationship_id in pending:
+                        element.set("Target", pending.pop(relationship_id))
+                if pending:
+                    raise ValueError(
+                        "XLSX workbook relationship changed during normalization"
+                    )
+                content = ET.tostring(root, encoding="utf-8", xml_declaration=True)
+                target.writestr(member, content)
+                continue
+            if member.is_dir():
+                target.writestr(member, b"")
+                continue
+            with source.open(member) as source_stream, target.open(
+                member,
+                "w",
+                force_zip64=True,
+            ) as target_stream:
+                while chunk := source_stream.read(1024 * 1024):
+                    target_stream.write(chunk)
+    return output.getvalue()
+
+def _xlsx_sheet_merge_ranges(
+    raw: bytes,
+) -> tuple[
+    dict[str, tuple[tuple[int, int, int, int], ...]],
+    dict[str, str],
+]:
+    """流式读取 XLSX 合并单元格，不把工作表 XML 整体载入内存。"""
+
+    relationship_namespace = (
+        "http://schemas.openxmlformats.org/officeDocument/2006/relationships"
+    )
+    try:
+        with zipfile.ZipFile(io.BytesIO(raw)) as archive:
+            relationships: dict[str, tuple[str, str, str]] = {}
+            with archive.open("xl/_rels/workbook.xml.rels") as stream:
+                for _, element in ET.iterparse(stream, events=("end",)):
+                    if _xml_local_name(element.tag) != "Relationship":
+                        element.clear()
+                        continue
+                    relationship_id = element.attrib.get("Id")
+                    target = element.attrib.get("Target")
+                    target_mode = element.attrib.get("TargetMode", "Internal")
+                    relationship_type = element.attrib.get("Type", "")
+                    if relationship_id:
+                        if relationship_id in relationships:
+                            raise ValueError(
+                                "XLSX workbook contains duplicate relationship identifiers"
+                            )
+                        relationships[relationship_id] = (
+                            target or "",
+                            target_mode,
+                            relationship_type,
+                        )
+                    element.clear()
+
+            sheet_paths: dict[str, str] = {}
+            normalized_targets: dict[str, str] = {}
+            with archive.open("xl/workbook.xml") as stream:
+                for _, element in ET.iterparse(stream, events=("end",)):
+                    if _xml_local_name(element.tag) != "sheet":
+                        element.clear()
+                        continue
+                    title = element.attrib.get("name")
+                    relationship_id = element.attrib.get(
+                        f"{{{relationship_namespace}}}id"
+                    )
+                    if title and relationship_id:
+                        relationship = relationships.get(relationship_id)
+                        if relationship is None:
+                            raise ValueError(
+                                f"XLSX worksheet {title!r} references a missing relationship"
+                            )
+                        target, target_mode, relationship_type = relationship
+                        if target_mode.strip().lower() != "internal":
+                            raise ValueError(
+                                f"XLSX worksheet {title!r} uses an external relationship"
+                            )
+                        if not relationship_type.endswith("/worksheet"):
+                            raise ValueError(
+                                f"XLSX worksheet {title!r} has an invalid relationship type"
+                            )
+                        member_name = _resolve_xlsx_relationship_target(
+                            archive,
+                            target,
+                        )
+                        sheet_paths[title] = member_name
+                        canonical_target = f"/{member_name}"
+                        if target != canonical_target:
+                            normalized_targets[relationship_id] = canonical_target
+                    element.clear()
+
+            result: dict[str, tuple[tuple[int, int, int, int], ...]] = {}
+            total_ranges = 0
+            for title, member_name in sheet_paths.items():
+                ranges: list[tuple[int, int, int, int]] = []
+                with archive.open(member_name) as stream:
+                    for _, element in ET.iterparse(stream, events=("end",)):
+                        if _xml_local_name(element.tag) != "mergeCell":
+                            element.clear()
+                            continue
+                        reference = element.attrib.get("ref")
+                        if reference:
+                            try:
+                                boundaries = range_boundaries(reference)
+                            except ValueError as exc:
+                                raise ValueError(
+                                    f"XLSX worksheet {title!r} has an invalid merged range"
+                                ) from exc
+                            ranges.append(boundaries)
+                            total_ranges += 1
+                            if total_ranges > _MAX_WORKBOOK_MERGED_RANGES:
+                                raise ValueError(
+                                    "XLSX workbook contains too many merged ranges "
+                                    f"(limit {_MAX_WORKBOOK_MERGED_RANGES})"
+                                )
+                        element.clear()
+                result[title] = tuple(ranges)
+            return result, normalized_targets
+    except (KeyError, ET.ParseError, zipfile.BadZipFile) as exc:
+        raise ValueError(f"invalid XLSX workbook structure: {exc}") from exc
+
+def _xlsx_header_end_row(
+    first_row: int,
+    rows: Mapping[int, Sequence[Any]],
+    merged_ranges: Sequence[tuple[int, int, int, int]],
+) -> int:
+    """在固定深度内闭包表头合并关系，忽略越界或跨空行的可疑级联。"""
+
+    header_end = first_row
+    maximum_end = first_row + _MAX_WORKBOOK_HEADER_ROWS - 1
+    has_header_hierarchy = any(
+        max_column > min_column and min_row == first_row
+        for min_column, min_row, max_column, _ in merged_ranges
+    )
+    changed = True
+    while changed:
+        changed = False
+        for min_column, min_row, max_column, max_row in merged_ranges:
+            if min_row < first_row or min_row > header_end or max_row < first_row:
+                continue
+            if max_column == min_column and not has_header_hierarchy:
+                continue
+            candidate = max_row + 1 if max_column > min_column else max_row
+            if candidate <= header_end or candidate > maximum_end:
+                continue
+            if (
+                max_column > min_column
+                and len(_xlsx_nonempty_values(rows.get(min_row, ()))) < 2
+                and len(_xlsx_nonempty_values(rows.get(candidate, ()))) < 2
+            ):
+                continue
+            if any(
+                not rows.get(row_number)
+                for row_number in range(header_end + 1, candidate + 1)
+            ):
+                continue
+            header_end = candidate
+            changed = True
+    return header_end
+
+def _xlsx_headers(
+    title: str,
+    rows: Mapping[int, Sequence[Any]],
+    first_row: int,
+    header_end: int,
+    merged_ranges: Sequence[tuple[int, int, int, int]],
+) -> list[str]:
+    width = max((len(row) for row in rows.values()), default=0)
+    for min_column, min_row, max_column, max_row in merged_ranges:
+        if min_row <= header_end and max_row >= first_row:
+            width = max(width, max_column)
+    if width > _MAX_WORKBOOK_COLUMNS:
+        raise ValueError(
+            f"XLSX worksheet {title!r} exceeds {_MAX_WORKBOOK_COLUMNS} columns"
+        )
+
+    matrix = [
+        list(rows.get(row_number, ())) + [None] * (width - len(rows.get(row_number, ())))
+        for row_number in range(first_row, header_end + 1)
+    ]
+    for min_column, min_row, max_column, max_row in merged_ranges:
+        if min_row > header_end or max_row < first_row:
+            continue
+        source_row = max(first_row, min_row) - first_row
+        source_column = min_column - 1
+        source = matrix[source_row][source_column]
+        for row_number in range(max(first_row, min_row), min(header_end, max_row) + 1):
+            for column_number in range(min_column, max_column + 1):
+                matrix[row_number - first_row][column_number - 1] = source
+
+    headers: list[str] = []
+    for column in range(width):
+        components: list[str] = []
+        for row in matrix:
+            component = normalize_text(str(row[column] or ""))
+            if component and (not components or component != components[-1]):
+                components.append(component)
+        header = ".".join(components)
+        if not header:
+            raise ValueError(f"XLSX worksheet {title!r} contains an empty header")
+        headers.append(header)
+    if len(set(headers)) != len(headers):
+        raise ValueError(f"XLSX worksheet {title!r} contains duplicate headers")
+    return headers
+
+def _xlsx_nonempty_values(row: Sequence[Any]) -> list[Any]:
+    return [value for value in row if value not in {None, ""}]
+
+def _infer_xlsx_header_region(
+    title: str,
+    rows: Mapping[int, Sequence[Any]],
+    merged_ranges: Sequence[tuple[int, int, int, int]],
+) -> tuple[int, int, list[str]]:
+    """从有界前缀中推断表头，区分报表说明、多级表头和正文合并。"""
+
+    ordered_rows = sorted(rows)
+    if not ordered_rows:
+        return 0, 0, []
+    first_nonempty_row = ordered_rows[0]
+    horizontal_merge_rows = {
+        min_row
+        for min_column, min_row, max_column, _ in merged_ranges
+        if max_column > min_column
+    }
+    candidates: list[tuple[float, int, int, list[str]]] = []
+    for first_row in ordered_rows:
+        raw_values = _xlsx_nonempty_values(rows[first_row])
+        if not raw_values:
+            continue
+        if len(raw_values) < 2 and first_row in horizontal_merge_rows:
+            continue
+
+        header_end = _xlsx_header_end_row(first_row, rows, merged_ranges)
+        header_rows = {
+            row_number: rows[row_number]
+            for row_number in range(first_row, header_end + 1)
+            if row_number in rows
+        }
+        try:
+            headers = _xlsx_headers(
+                title,
+                header_rows,
+                first_row,
+                header_end,
+                merged_ranges,
+            )
+        except ValueError:
+            if header_end == first_row:
+                continue
+            header_end = first_row
+            try:
+                headers = _xlsx_headers(
+                    title,
+                    {first_row: rows[first_row]},
+                    first_row,
+                    first_row,
+                    merged_ranges,
+                )
+            except ValueError:
+                continue
+
+        data_rows = [rows[row_number] for row_number in ordered_rows if row_number > header_end]
+        if any(len(row) > len(headers) for row in data_rows):
+            continue
+
+        text_ratio = sum(isinstance(value, str) for value in raw_values) / len(raw_values)
+        score = text_ratio * 6 + min(len(raw_values), 4)
+        if data_rows:
+            first_data_values = _xlsx_nonempty_values(data_rows[0])
+            score += 4 * min(len(first_data_values), len(headers)) / len(headers)
+            if first_data_values:
+                score += (
+                    2
+                    * sum(
+                        not isinstance(value, str)
+                        for value in first_data_values
+                    )
+                    / len(first_data_values)
+                )
+        first_label = normalize_text(str(raw_values[0]))
+        if len(raw_values) <= 2 and _XLSX_REPORT_METADATA_PATTERN.match(first_label):
+            score -= 8
+        candidates.append((score, first_row, header_end, headers))
+
+    if not candidates:
+        first_row = first_nonempty_row
+        headers = _xlsx_headers(
+            title,
+            {first_row: rows[first_row]},
+            first_row,
+            first_row,
+            (),
+        )
+        return first_row, first_row, headers
+    _, first_row, header_end, headers = max(
+        candidates,
+        key=lambda candidate: (candidate[0], -candidate[1]),
+    )
+    return first_row, header_end, headers
+
+def _extract_xlsx_records(
+    raw: bytes,
+) -> tuple[list[dict[str, Any]], list[dict[str, Any]]]:
+    _validate_office_archive(raw, "xlsx")
+    merged_by_sheet, normalized_targets = _xlsx_sheet_merge_ranges(raw)
+    workbook_raw = (
+        _rewrite_xlsx_workbook_relationships(raw, normalized_targets)
+        if normalized_targets
+        else raw
+    )
+    try:
+        workbook = load_workbook(
+            io.BytesIO(workbook_raw),
+            read_only=True,
+            data_only=True,
+            keep_links=False,
+        )
+    except Exception as exc:
+        raise ValueError(f"invalid XLSX file: {exc}") from exc
+
+    records: list[dict[str, Any]] = []
+    locators: list[dict[str, Any]] = []
+    total_cells = 0
+    try:
+        if len(workbook.worksheets) > _MAX_WORKBOOK_SHEETS:
+            raise ValueError(
+                f"XLSX contains too many worksheets (limit {_MAX_WORKBOOK_SHEETS})"
+            )
+        for sheet_index, worksheet in enumerate(workbook.worksheets):
+            reset_dimensions = getattr(worksheet, "reset_dimensions", None)
+            if callable(reset_dimensions):
+                reset_dimensions()
+            merged_ranges = merged_by_sheet.get(worksheet.title, ())
+            sheet_rows = 0
+            scanned_rows = 0
+            row_iterator = enumerate(
+                worksheet.iter_rows(values_only=True),
+                start=1,
+            )
+            buffered_rows: dict[int, Sequence[Any]] = {}
+
+            def normalized_row_values(
+                row: Sequence[Any],
+                sheet_title: str = worksheet.title,
+            ) -> list[Any]:
+                values = list(row)
+                while values and values[-1] in {None, ""}:
+                    values.pop()
+                if len(values) > _MAX_WORKBOOK_COLUMNS:
+                    raise ValueError(
+                        f"XLSX worksheet {sheet_title!r} exceeds "
+                        f"{_MAX_WORKBOOK_COLUMNS} columns"
+                    )
+                return values
+
+            for row_number, row in row_iterator:
+                scanned_rows += 1
+                if scanned_rows > _MAX_WORKBOOK_SCANNED_ROWS:
+                    raise ValueError(
+                        f"XLSX worksheet {worksheet.title!r} exceeds "
+                        f"{_MAX_WORKBOOK_SCANNED_ROWS} scanned rows"
+                    )
+                values = normalized_row_values(row)
+                if not values or all(value in {None, ""} for value in values):
+                    continue
+                buffered_rows[row_number] = tuple(values)
+                if len(buffered_rows) >= _MAX_WORKBOOK_HEADER_SCAN_ROWS:
+                    break
+
+            if not buffered_rows:
+                continue
+            _, header_end_row, headers = _infer_xlsx_header_region(
+                worksheet.title,
+                buffered_rows,
+                merged_ranges,
+            )
+
+            def append_record(
+                row_number: int,
+                values: Sequence[Any],
+                record_headers: Sequence[str] = tuple(headers),
+                locator_sheet_index: int = sheet_index,
+                sheet_title: str = worksheet.title,
+            ) -> None:
+                nonlocal total_cells, sheet_rows
+                row_values = list(values)
+                if len(row_values) > len(record_headers):
+                    raise ValueError(
+                        f"XLSX worksheet {sheet_title!r} has a row wider than its header"
+                    )
+                row_values.extend([None] * (len(record_headers) - len(row_values)))
+                record = {
+                    header: _normalize_spreadsheet_value(value)
+                    for header, value in zip(record_headers, row_values, strict=True)
+                }
+                if not any(value not in {"", None} for value in record.values()):
+                    return
+                sheet_record_index = sheet_rows
+                sheet_rows += 1
+                total_cells += len(record_headers)
+                if sheet_rows > _MAX_WORKBOOK_ROWS:
+                    raise ValueError(
+                        f"XLSX worksheet {sheet_title!r} exceeds "
+                        f"{_MAX_WORKBOOK_ROWS} data rows"
+                    )
+                if total_cells > _MAX_WORKBOOK_CELLS:
+                    raise ValueError(
+                        f"XLSX workbook exceeds {_MAX_WORKBOOK_CELLS} populated cells"
+                    )
+                records.append(record)
+                locators.append(
+                    {
+                        "kind": "xlsx",
+                        "record_index": len(records),
+                        "sheet_index": locator_sheet_index,
+                        "sheet_name": sheet_title,
+                        "row_number": row_number,
+                        "sheet_record_index": sheet_record_index,
+                    }
+                )
+
+            for row_number, values in buffered_rows.items():
+                if row_number > header_end_row:
+                    append_record(row_number, values)
+
+            for row_number, row in row_iterator:
+                scanned_rows += 1
+                if scanned_rows > _MAX_WORKBOOK_SCANNED_ROWS:
+                    raise ValueError(
+                        f"XLSX worksheet {worksheet.title!r} exceeds "
+                        f"{_MAX_WORKBOOK_SCANNED_ROWS} scanned rows"
+                    )
+                values = normalized_row_values(row)
+                if not values or all(value in {None, ""} for value in values):
+                    continue
+                append_record(row_number, values)
+    finally:
+        workbook.close()
+    return records, locators

backend/app/modules/data_process/algorithms/parsers/pdf.py

@@ -0,0 +1,299 @@
+"""数据处理算法 - PDF 文档解析。"""
+
+from __future__ import annotations
+
+import io
+import math
+import re
+import unicodedata
+from collections.abc import Sequence
+from typing import Literal
+
+from pypdf import PdfReader
+
+from ..text_utils import normalize_text
+from ..types import (
+    DocumentNoiseSpan,
+    PdfPageText,
+    _MAX_EXTRACTED_TEXT_CHARS,
+    _MAX_PDF_PAGES,
+    _PdfLine,
+)
+
+_PDF_PAGE_NUMBER_LINE_PATTERN = re.compile(
+    r"^(?:页次\s*)?(?:第\s*)?(?P<page>\d+)\s*页\s*"
+    r"(?:(?:[/／]\s*)?共\s*(?P<total>\d+)\s*页)?$"
+)
+_PDF_FRACTION_PAGE_LINE_PATTERN = re.compile(
+    r"^[—–-]?\s*(?P<page>\d+)\s*[/／]\s*(?P<total>\d+)\s*[—–-]?$"
+)
+_PDF_CLASSIFICATION_LABEL_PATTERN = re.compile(
+    r"^(?:(?:秘密等级|密级)\s*)?(?:商密|秘密|机密|绝密)"
+    r"\s*(?:[【\[(（][^】\])）]{1,8}[】\])）])?$"
+)
+_TOC_TITLE_PATTERN = re.compile(r"^(?:目\s*录|contents)$", re.IGNORECASE)
+_TOC_LEADER_ENTRY_PATTERN = re.compile(
+    r"(?:[.．…·•]\s*){3,}\s*\d{1,4}\s*$"
+)
+_TOC_NUMBERED_ENTRY_PATTERN = re.compile(
+    r"^(?:第[\u3400-\u4dbf\u4e00-\u9fff]{1,12}章|附表\s*\d+|\d+(?:\.\d+)+)"
+    r"\s+.+\s+\d{1,4}\s*$",
+    re.IGNORECASE,
+)
+_MARGIN_TEMPLATE_KEYWORDS = (
+    "页",
+    "页次",
+    "版本",
+    "文件编码",
+    "秘密等级",
+    "密级",
+    "商密",
+    "confidential",
+)
+
+
+def extract_pdf_page_texts(raw: bytes) -> tuple[PdfPageText, ...]:
+    """提取 PDF 各页文本，并保留与切片字符偏移一致的页范围。"""
+
+    if b"%PDF-" not in raw[:1024]:
+        raise ValueError("invalid PDF file: missing PDF header")
+    try:
+        reader = PdfReader(io.BytesIO(raw), strict=True)
+    except Exception as exc:
+        raise ValueError(f"invalid PDF file: {exc}") from exc
+    if reader.is_encrypted and not reader.decrypt(""):
+        raise ValueError("password-protected PDF files are not supported")
+    if len(reader.pages) > _MAX_PDF_PAGES:
+        raise ValueError(f"PDF contains too many pages (limit {_MAX_PDF_PAGES})")
+
+    pages: list[PdfPageText] = []
+    total = 0
+    has_text = False
+    for page_number, page in enumerate(reader.pages, start=1):
+        try:
+            text = normalize_text(page.extract_text() or "")
+        except Exception as exc:
+            raise ValueError(
+                f"failed to extract text from PDF page {page_number}: {exc}"
+            ) from exc
+        if not text:
+            pages.append(
+                PdfPageText(
+                    page_number=page_number,
+                    text="",
+                    source_start=total,
+                    source_end=total,
+                )
+            )
+            continue
+        if has_text:
+            total += 2
+        start = total
+        total += len(text)
+        if total > _MAX_EXTRACTED_TEXT_CHARS:
+            raise ValueError(
+                f"extracted document text exceeds {_MAX_EXTRACTED_TEXT_CHARS} characters"
+            )
+        pages.append(
+            PdfPageText(
+                page_number=page_number,
+                text=text,
+                source_start=start,
+                source_end=total,
+            )
+        )
+        has_text = True
+    if not has_text:
+        raise ValueError(
+            "PDF contains no extractable text; scanned or image-only PDF files are not supported"
+        )
+    return tuple(pages)
+
+def _pdf_page_lines(page: PdfPageText) -> tuple[_PdfLine, ...]:
+    lines: list[_PdfLine] = []
+    local_offset = 0
+    for raw_line in page.text.splitlines(keepends=True):
+        content = raw_line.rstrip("\r\n")
+        leading = len(content) - len(content.lstrip())
+        trailing = len(content.rstrip())
+        text = content.strip()
+        if text:
+            lines.append(
+                _PdfLine(
+                    text=text,
+                    start=page.source_start + local_offset + leading,
+                    end=page.source_start + local_offset + trailing,
+                )
+            )
+        local_offset += len(raw_line)
+    return tuple(lines)
+
+def _is_standalone_page_number(
+    text: str,
+    *,
+    physical_page: int,
+    page_count: int,
+) -> bool:
+    normalized = unicodedata.normalize("NFKC", text).strip()
+    match = _PDF_PAGE_NUMBER_LINE_PATTERN.fullmatch(normalized)
+    if match is None:
+        match = _PDF_FRACTION_PAGE_LINE_PATTERN.fullmatch(normalized)
+    if match is None or int(match.group("page")) != physical_page:
+        return False
+    total = match.groupdict().get("total")
+    return total is None or int(total) == page_count
+
+def _margin_signature(text: str) -> str:
+    normalized = unicodedata.normalize("NFKC", text).casefold()
+    normalized = re.sub(r"\s+", " ", normalized).strip()
+    if any(keyword in normalized for keyword in _MARGIN_TEMPLATE_KEYWORDS):
+        normalized = re.sub(r"\d+", "#", normalized)
+    return normalized
+
+def _has_margin_metadata_keyword(text: str) -> bool:
+    normalized = unicodedata.normalize("NFKC", text).casefold()
+    return any(keyword in normalized for keyword in _MARGIN_TEMPLATE_KEYWORDS)
+
+def _has_meaningful_margin_signature(signature: str) -> bool:
+    return len(re.sub(r"[#\W_]+", "", signature, flags=re.UNICODE)) >= 2
+
+def _is_toc_leader_entry(text: str) -> bool:
+    return bool(_TOC_LEADER_ENTRY_PATTERN.search(text))
+
+def _is_toc_numbered_entry(text: str) -> bool:
+    return bool(_TOC_NUMBERED_ENTRY_PATTERN.fullmatch(text))
+
+def detect_pdf_document_noise(
+    pages: Sequence[PdfPageText],
+) -> tuple[DocumentNoiseSpan, ...]:
+    """识别 PDF 中的独立页码、重复页边内容和高置信目录。
+
+    规则只查看每页顶部 5 行和底部 3 行来推断页眉页脚；目录必须有
+    明显的点引导线密度，避免仅因正文中出现“目录”或章节标题而误删。
+    """
+
+    page_lines = tuple(_pdf_page_lines(page) for page in pages)
+    detected: dict[tuple[int, int], DocumentNoiseSpan] = {}
+
+    def mark(
+        line: _PdfLine,
+        kind: Literal["page_number", "repeated_margin", "table_of_contents"],
+    ) -> None:
+        detected.setdefault(
+            (line.start, line.end),
+            DocumentNoiseSpan(
+                start=line.start,
+                end=line.end,
+                kind=kind,
+            ),
+        )
+
+    for page, lines in zip(pages, page_lines, strict=True):
+        for line in lines:
+            if _is_standalone_page_number(
+                line.text,
+                physical_page=page.page_number,
+                page_count=len(pages),
+            ):
+                mark(line, "page_number")
+        outer_margin_lines = (*lines[:2], *lines[-2:])
+        for line in outer_margin_lines:
+            if _PDF_CLASSIFICATION_LABEL_PATTERN.fullmatch(line.text):
+                mark(line, "repeated_margin")
+
+    # 只在三页及以上文档中推断通用页眉页脚，避免短文档误删。
+    if len(pages) >= 3:
+        signature_pages: dict[str, set[int]] = {}
+        candidate_lines: list[tuple[int, _PdfLine, str]] = []
+        for page_index, lines in enumerate(page_lines):
+            boundary_lines = (
+                *((line, index < 2) for index, line in enumerate(lines[:5])),
+                *((line, index < 2) for index, line in enumerate(reversed(lines[-3:]))),
+            )
+            seen_ranges: set[tuple[int, int]] = set()
+            for line, is_outer_margin in boundary_lines:
+                line_range = (line.start, line.end)
+                if (
+                    line_range in seen_ranges
+                    or line_range in detected
+                    or len(line.text) > 160
+                ):
+                    continue
+                seen_ranges.add(line_range)
+                if not is_outer_margin and not _has_margin_metadata_keyword(line.text):
+                    continue
+                signature = _margin_signature(line.text)
+                if not _has_meaningful_margin_signature(signature):
+                    continue
+                signature_pages.setdefault(signature, set()).add(page_index)
+                candidate_lines.append((page_index, line, signature))
+        minimum_pages = max(3, math.ceil(len(pages) * 0.3))
+        repeated_signatures = {
+            signature
+            for signature, matching_pages in signature_pages.items()
+            if len(matching_pages) >= minimum_pages
+        }
+        for _, line, signature in candidate_lines:
+            if signature in repeated_signatures:
+                mark(line, "repeated_margin")
+
+    # 先依据强证据判定目录页，再补充删除少量不带点引导线的编号目录项。
+    toc_active = False
+    for lines in page_lines:
+        content_lines = [
+            line for line in lines if (line.start, line.end) not in detected
+        ]
+        leader_entries = [line for line in content_lines if _is_toc_leader_entry(line.text)]
+        titles = [line for line in content_lines if _TOC_TITLE_PATTERN.fullmatch(line.text)]
+        starts_toc = bool(titles and len(leader_entries) >= 2)
+        is_toc_dense = bool(
+            len(leader_entries) >= 3
+            and len(leader_entries) / max(1, len(content_lines)) >= 0.5
+        )
+        if not (starts_toc or (toc_active and is_toc_dense)):
+            toc_active = False
+            continue
+        toc_active = True
+        for line in content_lines:
+            if (
+                line in titles
+                or _is_toc_leader_entry(line.text)
+                or _is_toc_numbered_entry(line.text)
+            ):
+                mark(line, "table_of_contents")
+
+    return tuple(sorted(detected.values(), key=lambda span: (span.start, span.end)))
+
+def remove_document_noise(
+    text: str,
+    spans: Sequence[DocumentNoiseSpan],
+    *,
+    source_offset: int = 0,
+) -> str:
+    """按原文绝对偏移移除噪声，不改动调用方保留的原文及偏移。"""
+
+    text_end = source_offset + len(text)
+    intersections = sorted(
+        (
+            max(0, span.start - source_offset),
+            min(len(text), span.end - source_offset),
+        )
+        for span in spans
+        if span.start < text_end and span.end > source_offset
+    )
+    if not intersections:
+        return text
+    parts: list[str] = []
+    cursor = 0
+    for start, end in intersections:
+        if end <= cursor:
+            continue
+        if start > cursor:
+            parts.append(text[cursor:start])
+        cursor = end
+    parts.append(text[cursor:])
+    cleaned = normalize_text("".join(parts))
+    return re.sub(r"\n{3,}", "\n\n", cleaned)
+
+def _extract_pdf_text(raw: bytes) -> str:
+    return "\n\n".join(page.text for page in extract_pdf_page_texts(raw) if page.text)

backend/app/modules/data_process/algorithms/quality.py

@@ -0,0 +1,428 @@
+"""数据处理算法 - 质量评分和去重。"""
+
+from __future__ import annotations
+
+import hashlib
+import json
+import math
+import re
+import unicodedata
+from collections import Counter
+from collections.abc import Iterable, Mapping, Sequence
+from copy import deepcopy
+from typing import Any
+
+from .text_utils import normalize_text
+from .types import (
+    _MAX_ANOMALY_TEXT_CHARS,
+    _MOJIBAKE_MARKERS,
+    _TOKEN_PATTERN,
+    ProcessedStructuredRecord,
+    QualityScore,
+)
+
+
+def estimate_token_count(text: str) -> int:
+    """粗略估计文本的 token 数量。"""
+    return len(_TOKEN_PATTERN.findall(text))
+
+
+def content_quality_flags(
+    text: str,
+    *,
+    min_chars: int = 20,
+    min_tokens: int = 5,
+    max_chars: int = _MAX_ANOMALY_TEXT_CHARS,
+) -> tuple[str, ...]:
+    """返回非结构化内容的确定性低质量原因。"""
+
+    if min_chars < 0 or min_tokens < 0 or max_chars <= 0:
+        raise ValueError("content quality limits must be non-negative")
+    normalized = normalize_text(text)
+    if not normalized:
+        return ("empty_content",)
+    flags: list[str] = []
+    if len(normalized) < min_chars or estimate_token_count(normalized) < min_tokens:
+        flags.append("content_too_short")
+    if len(normalized) > max_chars:
+        flags.append("content_too_long")
+    if any(marker in normalized for marker in _MOJIBAKE_MARKERS):
+        flags.append("mojibake")
+    nonspace = [char for char in normalized if not char.isspace()]
+    if nonspace:
+        readable_ratio = sum(
+            char.isprintable()
+            and unicodedata.category(char) not in {"Co", "Cs", "Cn"}
+            for char in nonspace
+        ) / len(nonspace)
+        if readable_ratio < 0.85:
+            flags.append("low_printable_ratio")
+        if len(nonspace) >= 100:
+            most_common = Counter(nonspace).most_common(1)[0][1]
+            if most_common / len(nonspace) > 0.9:
+                flags.append("repetitive_content")
+    return tuple(dict.fromkeys(flags))
+
+def is_low_quality_content(
+    text: str,
+    *,
+    min_chars: int = 20,
+    min_tokens: int = 5,
+    max_chars: int = _MAX_ANOMALY_TEXT_CHARS,
+) -> bool:
+    """判断内容是否命中任一低质量规则。"""
+
+    return bool(
+        content_quality_flags(
+            text,
+            min_chars=min_chars,
+            min_tokens=min_tokens,
+            max_chars=max_chars,
+        )
+    )
+
+def _deduplicate_structured_entries(
+    entries: Sequence[ProcessedStructuredRecord],
+) -> list[ProcessedStructuredRecord]:
+    """仅按整条 canonical JSON 稳定去重，避免误删同 ID 的更新记录。"""
+
+    # canonical_record_json 位于 structured_processing，延迟导入以断开循环依赖。
+    from .structured_processing import canonical_record_json
+
+    exact_seen: set[str] = set()
+    unique: list[ProcessedStructuredRecord] = []
+    for entry in entries:
+        record = entry.record
+        fingerprint = hashlib.sha256(canonical_record_json(record).encode("utf-8")).hexdigest()
+        if fingerprint in exact_seen:
+            continue
+        exact_seen.add(fingerprint)
+        unique.append(
+            ProcessedStructuredRecord(
+                entry.source_index,
+                deepcopy(dict(record)),
+            )
+        )
+    return unique
+
+def deduplicate_structured_records(
+    records: Sequence[Mapping[str, Any]],
+) -> list[dict[str, Any]]:
+    """仅按整条 canonical JSON 稳定去重。"""
+
+    entries = [
+        ProcessedStructuredRecord(index, deepcopy(dict(record)))
+        for index, record in enumerate(records)
+    ]
+    return [entry.record for entry in _deduplicate_structured_entries(entries)]
+
+def _near_duplicate_features(text: str, shingle_size: int) -> tuple[str, ...]:
+    if isinstance(shingle_size, bool) or not isinstance(shingle_size, int):
+        raise TypeError("shingle_size must be an integer")
+    if shingle_size <= 0:
+        raise ValueError("shingle_size must be greater than 0")
+    tokens = re.findall(
+        r"[\u3400-\u4dbf\u4e00-\u9fff]|[A-Za-z0-9_]+",
+        normalize_text(text).casefold(),
+    )
+    if not tokens:
+        return ()
+    if len(tokens) < shingle_size:
+        return ("\x1f".join(tokens),)
+    return tuple(
+        "\x1f".join(tokens[index : index + shingle_size])
+        for index in range(len(tokens) - shingle_size + 1)
+    )
+
+def near_duplicate_fingerprint(text: str, *, shingle_size: int = 3) -> str:
+    """生成 64 位 SimHash 指纹，用于低成本近重复候选筛选。"""
+
+    if isinstance(shingle_size, bool) or not isinstance(shingle_size, int):
+        raise TypeError("shingle_size must be an integer")
+    if shingle_size <= 0:
+        raise ValueError("shingle_size must be greater than 0")
+    features = Counter(_near_duplicate_features(text, shingle_size))
+    if not features:
+        return "0" * 16
+    vector = [0] * 64
+    for feature, weight in features.items():
+        digest = int.from_bytes(hashlib.sha256(feature.encode("utf-8")).digest()[:8], "big")
+        for bit in range(64):
+            vector[bit] += weight if digest & (1 << bit) else -weight
+    fingerprint = sum(1 << bit for bit, value in enumerate(vector) if value >= 0)
+    return f"{fingerprint:016x}"
+
+def fingerprints_are_near_duplicate(
+    left: str,
+    right: str,
+    *,
+    max_hamming_distance: int = 3,
+) -> bool:
+    """比较两个 64 位十六进制 SimHash 指纹。"""
+
+    if isinstance(max_hamming_distance, bool) or not isinstance(max_hamming_distance, int):
+        raise TypeError("max_hamming_distance must be an integer")
+    if not 0 <= max_hamming_distance <= 64:
+        raise ValueError("max_hamming_distance must be in [0, 64]")
+    if not re.fullmatch(r"[0-9a-fA-F]{16}", left) or not re.fullmatch(
+        r"[0-9a-fA-F]{16}", right
+    ):
+        raise ValueError("fingerprints must be 16-character hexadecimal strings")
+    distance = (int(left, 16) ^ int(right, 16)).bit_count()
+    return distance <= max_hamming_distance
+
+def is_near_duplicate(
+    left: str,
+    right: str,
+    *,
+    shingle_size: int = 3,
+    similarity_threshold: float = 0.9,
+    max_hamming_distance: int = 3,
+) -> bool:
+    """结合词片 Jaccard 和 SimHash 判断两段内容是否近重复。"""
+
+    if isinstance(similarity_threshold, bool) or not isinstance(
+        similarity_threshold, (int, float)
+    ):
+        raise TypeError("similarity_threshold must be a number")
+    if not 0 <= similarity_threshold <= 1:
+        raise ValueError("similarity_threshold must be in [0, 1]")
+    if isinstance(max_hamming_distance, bool) or not isinstance(max_hamming_distance, int):
+        raise TypeError("max_hamming_distance must be an integer")
+    if not 0 <= max_hamming_distance <= 64:
+        raise ValueError("max_hamming_distance must be in [0, 64]")
+    left_normalized = normalize_text(left)
+    right_normalized = normalize_text(right)
+    if not left_normalized or not right_normalized:
+        return left_normalized == right_normalized
+    if left_normalized.casefold() == right_normalized.casefold():
+        return True
+    left_features = set(_near_duplicate_features(left_normalized, shingle_size))
+    right_features = set(_near_duplicate_features(right_normalized, shingle_size))
+    union = left_features | right_features
+    similarity = len(left_features & right_features) / len(union) if union else 1.0
+    if similarity >= similarity_threshold:
+        return True
+    return fingerprints_are_near_duplicate(
+        near_duplicate_fingerprint(left_normalized, shingle_size=shingle_size),
+        near_duplicate_fingerprint(right_normalized, shingle_size=shingle_size),
+        max_hamming_distance=max_hamming_distance,
+    )
+
+def record_fingerprint(record: Mapping[str, Any]) -> str:
+    """计算与字典键顺序无关的稳定记录指纹。"""
+
+    canonical = {
+        "instruction": normalize_text(str(record.get("instruction") or "")),
+        "input": normalize_text(str(record.get("input") or "")),
+        "output": normalize_text(str(record.get("output") or "")),
+    }
+    raw = json.dumps(canonical, ensure_ascii=False, sort_keys=True, separators=(",", ":"))
+    return hashlib.sha256(raw.encode("utf-8")).hexdigest()
+
+def _readability_score(text: str) -> float:
+    if not text:
+        return 0.0
+    nonspace = [char for char in text if not char.isspace()]
+    if not nonspace:
+        return 0.0
+    printable_ratio = sum(char.isprintable() for char in nonspace) / len(nonspace)
+    useful_ratio = sum(
+        char.isalnum() or "\u3400" <= char <= "\u9fff" or unicodedata.category(char).startswith("P")
+        for char in nonspace
+    ) / len(nonspace)
+    return round(100 * (0.65 * printable_ratio + 0.35 * useful_ratio), 2)
+
+
+def _internal_duplicate_score(text: str) -> float:
+    units = [unit.strip().lower() for unit in re.split(r"[\n。！？!?；;]+", text) if unit.strip()]
+    if len(units) <= 1:
+        return 100.0
+    return round(100 * len(set(units)) / len(units), 2)
+
+
+def _source_relevance_score(record: Mapping[str, Any], source_content: str) -> float:
+    """估算结果与来源文本的词元覆盖率。
+
+    这是无外部模型依赖、可重复的首版评分。没有来源文本（例如人工新增结果）
+    时不扣分；存在来源时，以结果中的有效词元被来源覆盖的比例计分。
+    """
+
+    source = normalize_text(source_content)
+    if not source:
+        return 100.0
+    candidate = normalize_text(
+        "\n".join(
+            str(record.get(field) or "") for field in ("instruction", "input", "output")
+        )
+    )
+
+    def semantic_tokens(text: str) -> set[str]:
+        return {
+            token.lower()
+            for token in _TOKEN_PATTERN.findall(text)
+            if token.isalnum() or "\u3400" <= token <= "\u9fff"
+        }
+
+    source_tokens = semantic_tokens(source)
+    candidate_tokens = semantic_tokens(candidate)
+    if not candidate_tokens:
+        return 0.0
+    if not source_tokens:
+        return 0.0
+    return round(100 * len(candidate_tokens & source_tokens) / len(candidate_tokens), 2)
+
+
+def score_quality(
+    record: Mapping[str, Any],
+    *,
+    min_output_length: int = 20,
+    source_content: str = "",
+    known_fingerprints: Iterable[str] = (),
+    threshold: float = 60.0,
+) -> QualityScore:
+    """按完整性、长度、可读性、来源相关性和重复度计算质量分。"""
+
+    if min_output_length <= 0:
+        raise ValueError("min_output_length must be greater than 0")
+    if not 0 <= threshold <= 100:
+        raise ValueError("threshold must be in [0, 100]")
+
+    instruction = normalize_text(str(record.get("instruction") or ""))
+    input_text = normalize_text(str(record.get("input") or ""))
+    output = normalize_text(str(record.get("output") or ""))
+    flags: list[str] = []
+
+    completeness = 100.0
+    if not instruction:
+        completeness -= 50
+        flags.append("missing_instruction")
+    if not output:
+        completeness -= 50
+        flags.append("missing_output")
+
+    output_length = len(output)
+    length_score = round(min(100.0, output_length / min_output_length * 100), 2)
+    if output_length < min_output_length:
+        flags.append("output_too_short")
+
+    readability = _readability_score("\n".join((instruction, input_text, output)))
+    if readability < 70:
+        flags.append("low_readability")
+
+    relevance = _source_relevance_score(record, source_content)
+    if source_content and relevance < 30:
+        flags.append("low_source_relevance")
+
+    fingerprint = record_fingerprint(record)
+    known = set(known_fingerprints)
+    duplicate = 0.0 if fingerprint in known else _internal_duplicate_score(output)
+    if duplicate == 0:
+        flags.append("duplicate_record")
+    elif duplicate < 70:
+        flags.append("repetitive_output")
+
+    overall = round(
+        completeness * 0.35
+        + length_score * 0.20
+        + readability * 0.20
+        + relevance * 0.15
+        + duplicate * 0.10,
+        2,
+    )
+    hard_valid = bool(instruction and output)
+    return QualityScore(
+        overall=overall,
+        completeness=completeness,
+        length=length_score,
+        readability=readability,
+        relevance=relevance,
+        duplicate=duplicate,
+        is_valid=hard_valid and overall >= threshold,
+        flags=tuple(flags),
+        fingerprint=fingerprint,
+    )
+
+
+def _cosine_similarity(left: Sequence[float], right: Sequence[float]) -> float:
+    if not left or not right or len(left) != len(right):
+        return 0.0
+    dot = math.fsum(a * b for a, b in zip(left, right))
+    norm_left = math.sqrt(math.fsum(a * a for a in left))
+    norm_right = math.sqrt(math.fsum(b * b for b in right))
+    if not norm_left or not norm_right:
+        return 0.0
+    return dot / (norm_left * norm_right)
+
+
+def semantic_quality_scores(
+    record: Mapping[str, Any],
+    *,
+    source_content: str = "",
+    embed_model: Any = None,
+) -> dict[str, Any] | None:
+    """用本地嵌入向量计算语义相关性（0-100）。
+
+    返回 ``question_answer``（问题↔答案）、``answer_source``（答案↔来源，
+    无来源时缺省）与 ``overall``；嵌入模型不可用时返回 None 降级，不阻断流程。
+    """
+
+    try:
+        if embed_model is None:
+            from .embedding import semantic_embedding_model
+
+            embed_model = semantic_embedding_model()
+        if embed_model is None:
+            return None
+
+        question = normalize_text(
+            " ".join(
+                str(record.get(field) or "")
+                for field in ("instruction", "input")
+            )
+        )
+        answer = normalize_text(
+            str(record.get("output") or "") or str(record.get("chosen") or "")
+        )
+        source = normalize_text(source_content)
+        texts = [text for text in {question, answer, source} if text]
+        if not texts:
+            return None
+        vectors = {text: embed_model.get_text_embedding(text) for text in texts}
+    except Exception:
+        return None
+
+    scores: dict[str, Any] = {}
+    if question and answer:
+        scores["question_answer"] = round(
+            100 * max(0.0, _cosine_similarity(vectors[question], vectors[answer])), 2
+        )
+    if answer and source:
+        scores["answer_source"] = round(
+            100 * max(0.0, _cosine_similarity(vectors[answer], vectors[source])), 2
+        )
+    if not scores:
+        return None
+    scores["overall"] = round(sum(scores.values()) / len(scores), 2)
+    return scores
+
+
+def composite_overall(
+    *,
+    rule: float | None,
+    semantic: float | None = None,
+    judge: float | None = None,
+) -> float:
+    """三层加权组合：规则 35% + 语义 20% + 评审 45%，缺失层自动重归一。"""
+
+    if rule is None:
+        rule = 0.0
+    if judge is not None and semantic is not None:
+        overall = rule * 0.35 + semantic * 0.20 + judge * 0.45
+    elif semantic is not None:
+        overall = rule * 0.60 + semantic * 0.40
+    elif judge is not None:
+        overall = rule * 0.55 + judge * 0.45
+    else:
+        overall = rule
+    return round(max(0.0, min(100.0, overall)), 2)

backend/app/modules/data_process/algorithms/structured_processing.py

@@ -0,0 +1,809 @@
+"""数据处理算法 - 结构化数据处理。"""
+
+from __future__ import annotations
+
+import hashlib
+import json
+import math
+import re
+from collections.abc import Iterable, Mapping, Sequence
+from copy import deepcopy
+from datetime import date, datetime, time
+from decimal import Decimal
+from typing import Any
+
+from .parsers.json_parser import _extract_structured_records_with_locators
+from .quality import (
+    _deduplicate_structured_entries,
+    content_quality_flags,
+    estimate_token_count,
+)
+from .text_utils import _normalize_field_name, normalize_text, structured_json_dumps
+from .transforms import stable_split_assignments
+from .types import (
+    _CHINESE_NAME_CONTEXT_PATTERN,
+    _EMAIL_PATTERN,
+    _ENGLISH_NAME_CONTEXT_PATTERN,
+    _ID_CARD_PATTERN,
+    _IDENTITY_FIELD_PATTERN,
+    _MAX_STRUCTURED_DEPTH,
+    _MAX_STRUCTURED_FIELDS,
+    _NAME_FIELD_NAMES,
+    _PHONE_PATTERN,
+    _STRUCTURED_OPTIONS,
+    MAX_QA_PAIRS_PER_ITEM,
+    ProcessedStructuredRecord,
+    StructuredPreprocessOption,
+)
+
+
+def _canonical_value(value: Any) -> Any:
+    if value is None or isinstance(value, (bool, int)):
+        return value
+    if isinstance(value, Decimal):
+        if not value.is_finite():
+            raise ValueError("non-finite JSON number is not allowed")
+        return value
+    if isinstance(value, float):
+        if not math.isfinite(value):
+            raise ValueError("non-finite JSON number is not allowed")
+        return value
+    if isinstance(value, str):
+        return normalize_text(value)
+    if isinstance(value, (datetime, date, time)):
+        return value.isoformat()
+    if isinstance(value, Mapping):
+        normalized: dict[str, Any] = {}
+        for key, item in sorted(value.items(), key=lambda pair: str(pair[0])):
+            normalized_key = normalize_text(str(key))
+            if not normalized_key:
+                raise ValueError("structured record contains an empty field name")
+            if normalized_key in normalized:
+                raise ValueError(
+                    f"structured record fields collide after normalization: {normalized_key}"
+                )
+            normalized[normalized_key] = _canonical_value(item)
+        return normalized
+    if isinstance(value, (list, tuple)):
+        return [_canonical_value(item) for item in value]
+    if isinstance(value, (set, frozenset)):
+        items = [_canonical_value(item) for item in value]
+        return sorted(
+            items,
+            key=lambda item: structured_json_dumps(item, sort_keys=True),
+        )
+    if isinstance(value, (bytes, bytearray, memoryview)):
+        return bytes(value).hex()
+    return normalize_text(str(value))
+
+
+def _is_empty_value(value: Any) -> bool:
+    if value is None:
+        return True
+    if isinstance(value, str):
+        return not normalize_text(value)
+    if isinstance(value, Mapping):
+        return not value or all(_is_empty_value(item) for item in value.values())
+    if isinstance(value, (list, tuple, set, frozenset)):
+        return not value or all(_is_empty_value(item) for item in value)
+    return False
+
+
+def _is_name_field(field: Any) -> bool:
+    raw_field = normalize_text(str(field))
+    if not raw_field:
+        return False
+
+    # 只匹配明确表示自然人姓名的字段，避免将 table_name、product_name、
+    # chinese_name 等业务名称或元数据字段误判为个人敏感信息。
+    if _normalize_field_name(raw_field, "snake_case") in _NAME_FIELD_NAMES:
+        return True
+
+    # detect_structure 会使用点号生成扁平化路径（例如 profile.name）；此时仅
+    # 判断最后一个路径段，不能退回到宽泛的 ``*_name`` 后缀匹配。
+    if "." not in raw_field:
+        return False
+    leaf_field = raw_field.rsplit(".", 1)[-1]
+    return _normalize_field_name(leaf_field, "snake_case") in _NAME_FIELD_NAMES
+
+
+def _embedded_structure(value: Any) -> Any:
+    if not isinstance(value, str):
+        return value
+    candidate = value.strip()
+    if not candidate or candidate[0] not in "[{":
+        return value
+    try:
+        parsed = json.loads(candidate)
+    except json.JSONDecodeError:
+        return value
+    return parsed if isinstance(parsed, (Mapping, list)) else value
+
+
+def _structured_options(options: Iterable[str] | Mapping[str, Any]) -> set[str]:
+    if isinstance(options, str):
+        raise TypeError("options must be an iterable or mapping of option names")
+    if isinstance(options, Mapping):
+        enabled = {str(key) for key, value in options.items() if bool(value)}
+    else:
+        enabled = {str(option) for option in options}
+    unknown = enabled - _STRUCTURED_OPTIONS
+    if unknown:
+        raise ValueError(f"unsupported structured preprocess options: {', '.join(sorted(unknown))}")
+    return enabled
+
+
+def _clean_invalid_structured_entries(
+    entries: Sequence[ProcessedStructuredRecord],
+) -> list[ProcessedStructuredRecord]:
+    if not entries:
+        return []
+    fields: list[str] = []
+    for entry in entries:
+        record = entry.record
+        for field in record:
+            if field not in fields:
+                fields.append(field)
+    active_fields = [
+        field
+        for field in fields
+        if any(not _is_empty_value(entry.record.get(field)) for entry in entries)
+    ]
+    if not active_fields:
+        return []
+    cleaned: list[ProcessedStructuredRecord] = []
+    for entry in entries:
+        record = entry.record
+        values = {field: deepcopy(record.get(field)) for field in active_fields}
+        # 清洗只依据整行是否为空。外键、父级 ID 等字段天然允许为空，不能
+        # 因为字段名以 *_id 结尾就把它们全部提升为联合必填项。
+        if all(_is_empty_value(value) for value in values.values()):
+            continue
+        cleaned.append(ProcessedStructuredRecord(entry.source_index, values))
+    return cleaned
+
+
+def _percentile(values: Sequence[float], fraction: float) -> float:
+    if not values:
+        raise ValueError("cannot calculate a percentile of an empty sequence")
+    ordered = sorted(values)
+    position = (len(ordered) - 1) * fraction
+    lower = math.floor(position)
+    upper = math.ceil(position)
+    if lower == upper:
+        return ordered[lower]
+    weight = position - lower
+    return ordered[lower] * (1 - weight) + ordered[upper] * weight
+
+
+def _filter_anomalous_structured_entries(
+    entries: Sequence[ProcessedStructuredRecord],
+    *,
+    iqr_multiplier: float = 1.5,
+) -> list[ProcessedStructuredRecord]:
+    """按字段级数值 IQR、乱码和极端文本长度过滤异常记录。"""
+
+    if iqr_multiplier <= 0:
+        raise ValueError("iqr_multiplier must be greater than 0")
+    numeric_values: dict[str, list[float]] = {}
+    text_lengths: dict[str, list[float]] = {}
+    for entry in entries:
+        record = entry.record
+        for field, value in record.items():
+            if (
+                isinstance(value, (int, float))
+                and not isinstance(value, bool)
+                and not _IDENTITY_FIELD_PATTERN.search(
+                    _normalize_field_name(field, "snake_case")
+                )
+            ):
+                number = float(value)
+                if math.isfinite(number):
+                    numeric_values.setdefault(field, []).append(number)
+            elif isinstance(value, str) and value:
+                text_lengths.setdefault(field, []).append(float(len(value)))
+
+    numeric_bounds: dict[str, tuple[float, float]] = {}
+    for field, values in numeric_values.items():
+        # 小样本不做统计异常判断，避免把合法长尾值误删。
+        if len(values) < 8:
+            continue
+        first_quartile = _percentile(values, 0.25)
+        third_quartile = _percentile(values, 0.75)
+        spread = third_quartile - first_quartile
+        numeric_bounds[field] = (
+            first_quartile - iqr_multiplier * spread,
+            third_quartile + iqr_multiplier * spread,
+        )
+
+    text_upper_bounds: dict[str, float] = {}
+    for field, lengths in text_lengths.items():
+        if len(lengths) < 8:
+            continue
+        first_quartile = _percentile(lengths, 0.25)
+        third_quartile = _percentile(lengths, 0.75)
+        spread = third_quartile - first_quartile
+        text_upper_bounds[field] = max(512.0, third_quartile + 3 * spread)
+
+    accepted: list[ProcessedStructuredRecord] = []
+    for entry in entries:
+        record = entry.record
+        anomalous = False
+        for field, value in record.items():
+            if (
+                isinstance(value, (int, float))
+                and not isinstance(value, bool)
+                and not _IDENTITY_FIELD_PATTERN.search(
+                    _normalize_field_name(field, "snake_case")
+                )
+            ):
+                number = float(value)
+                if not math.isfinite(number):
+                    anomalous = True
+                    break
+                bounds = numeric_bounds.get(field)
+                if bounds and not bounds[0] <= number <= bounds[1]:
+                    anomalous = True
+                    break
+            if isinstance(value, str):
+                flags = content_quality_flags(value, min_chars=0, min_tokens=0)
+                if {"content_too_long", "mojibake", "low_printable_ratio"} & set(flags):
+                    anomalous = True
+                    break
+                upper_bound = text_upper_bounds.get(field)
+                if upper_bound is not None and len(value) > upper_bound:
+                    anomalous = True
+                    break
+        if not anomalous:
+            accepted.append(
+                ProcessedStructuredRecord(
+                    entry.source_index,
+                    deepcopy(dict(record)),
+                )
+            )
+    return accepted
+
+
+def _preview_content(item: Mapping[str, Any]) -> str:
+    for field in ("edited_content", "editedContent", "original_content", "originalContent", "content"):
+        value = item.get(field)
+        if value is not None:
+            return normalize_text(str(value))
+    return ""
+
+
+def _standard_fields(content: str) -> tuple[str, str, str]:
+    if not content:
+        return "", "", ""
+
+    try:
+        payload = json.loads(content)
+    except json.JSONDecodeError:
+        payload = None
+    if isinstance(payload, Mapping):
+        instruction = next(
+            (
+                str(payload[key])
+                for key in ("instruction", "question", "prompt")
+                if payload.get(key) is not None
+            ),
+            "",
+        )
+        input_text = next(
+            (str(payload[key]) for key in ("input", "context") if payload.get(key) is not None),
+            "",
+        )
+        output = next(
+            (str(payload[key]) for key in ("output", "answer", "response") if payload.get(key) is not None),
+            "",
+        )
+        if instruction or output:
+            return normalize_text(instruction), normalize_text(input_text), normalize_text(output)
+
+    question_answer = re.match(
+        r"^\s*(?:问|question)\s*[:：]\s*(.+?)(?:\n|\r\n?)\s*(?:答|answer)\s*[:：]\s*(.+)\s*$",
+        content,
+        flags=re.IGNORECASE | re.DOTALL,
+    )
+    if question_answer:
+        return normalize_text(question_answer.group(1)), "", normalize_text(question_answer.group(2))
+
+    lines = [line.strip() for line in content.splitlines() if line.strip()]
+    first_line = re.sub(r"^(?:问|question)\s*[:：]\s*", "", lines[0], flags=re.IGNORECASE)
+    output = normalize_text("\n".join(lines[1:])) if len(lines) > 1 else normalize_text(content)
+    return normalize_text(first_line), "", output
+
+
+def _protected_markdown_ranges(
+    text: str,
+    *,
+    preserve_code_blocks: bool,
+    preserve_tables: bool,
+    preserve_lists: bool,
+) -> list[tuple[int, int]]:
+    """找出不应从中间切开的 Markdown 代码块、表格和连续列表。"""
+
+    lines: list[tuple[int, int, str]] = []
+    cursor = 0
+    for raw_line in text.splitlines(keepends=True):
+        end = cursor + len(raw_line)
+        lines.append((cursor, end, raw_line.rstrip("\r\n")))
+        cursor = end
+    if cursor < len(text) or not lines:
+        lines.append((cursor, len(text), text[cursor:]))
+
+    ranges: list[tuple[int, int]] = []
+    code_line_indexes: set[int] = set()
+    if preserve_code_blocks:
+        open_block: tuple[int, str, int] | None = None
+        for index, (start, end, content) in enumerate(lines):
+            fence = re.match(r"^\s*(`{3,}|~{3,})", content)
+            if not fence:
+                continue
+            marker = fence.group(1)[0]
+            length = len(fence.group(1))
+            if open_block is None:
+                open_block = (index, marker, length)
+                continue
+            first_index, open_marker, open_length = open_block
+            if marker == open_marker and length >= open_length:
+                ranges.append((lines[first_index][0], end))
+                code_line_indexes.update(range(first_index, index + 1))
+                open_block = None
+        if open_block is not None:
+            first_index = open_block[0]
+            ranges.append((lines[first_index][0], len(text)))
+            code_line_indexes.update(range(first_index, len(lines)))
+
+    if preserve_tables:
+        index = 0
+        while index + 1 < len(lines):
+            if index in code_line_indexes:
+                index += 1
+                continue
+            header = lines[index][2].strip()
+            separator = lines[index + 1][2].strip().strip("|")
+            cells = [cell.strip() for cell in separator.split("|")]
+            if (
+                "|" not in header
+                or len(cells) < 2
+                or not all(re.fullmatch(r":?-{3,}:?", cell) for cell in cells)
+            ):
+                index += 1
+                continue
+            end_index = index + 1
+            while (
+                end_index + 1 < len(lines)
+                and end_index + 1 not in code_line_indexes
+                and lines[end_index + 1][2].strip()
+                and "|" in lines[end_index + 1][2]
+            ):
+                end_index += 1
+            ranges.append((lines[index][0], lines[end_index][1]))
+            index = end_index + 1
+
+    if preserve_lists:
+        list_pattern = re.compile(r"^\s*(?:[-+*]|\d+[.)])\s+\S")
+        continuation_pattern = re.compile(r"^\s{2,}\S")
+        index = 0
+        while index < len(lines):
+            if index in code_line_indexes or not list_pattern.match(lines[index][2]):
+                index += 1
+                continue
+            end_index = index
+            item_count = 1
+            while end_index + 1 < len(lines) and end_index + 1 not in code_line_indexes:
+                next_line = lines[end_index + 1][2]
+                if list_pattern.match(next_line):
+                    item_count += 1
+                    end_index += 1
+                elif continuation_pattern.match(next_line):
+                    end_index += 1
+                else:
+                    break
+            if item_count >= 2:
+                ranges.append((lines[index][0], lines[end_index][1]))
+            index = end_index + 1
+
+    merged: list[tuple[int, int]] = []
+    for start, end in sorted(ranges):
+        if merged and start < merged[-1][1]:
+            merged[-1] = (merged[-1][0], max(merged[-1][1], end))
+        else:
+            merged.append((start, end))
+    return merged
+
+
+def extract_structured_records(text: str, file_format: str) -> list[dict[str, Any]]:
+    """从 JSON、JSONL 或 CSV 中提取规范化记录。"""
+
+    records, _ = _extract_structured_records_with_locators(text, file_format)
+    return records
+
+def canonical_record_json(record: Mapping[str, Any]) -> str:
+    """生成与字段顺序无关、可用于比较和落库的 canonical JSON。"""
+
+    if not isinstance(record, Mapping):
+        raise TypeError("record must be a mapping")
+    return structured_json_dumps(_canonical_value(record), sort_keys=True)
+
+def normalize_structured_record(
+    record: Mapping[str, Any],
+    *,
+    field_name_style: str = "snake_case",
+) -> dict[str, Any]:
+    """规范字段名、Unicode/空白、容器类型和不可 JSON 化的标量。"""
+
+    if not isinstance(record, Mapping):
+        raise TypeError("record must be a mapping")
+    normalized: dict[str, Any] = {}
+    for key, value in record.items():
+        normalized_key = _normalize_field_name(key, field_name_style)
+        if not normalized_key:
+            raise ValueError("structured record contains an empty field name")
+        if normalized_key in normalized:
+            raise ValueError(
+                f"structured record fields collide after normalization: {normalized_key}"
+            )
+        normalized[normalized_key] = _canonical_value(value)
+    return dict(sorted(normalized.items()))
+
+def flatten_structured_record(
+    record: Mapping[str, Any],
+    *,
+    separator: str = ".",
+) -> dict[str, Any]:
+    """把嵌套对象展平；数组保留为 canonical JSON 兼容值。"""
+
+    if not isinstance(record, Mapping):
+        raise TypeError("record must be a mapping")
+    if not separator:
+        raise ValueError("separator cannot be empty")
+    flattened: dict[str, Any] = {}
+
+    def visit(value: Any, path: tuple[str, ...], depth: int) -> None:
+        if depth > _MAX_STRUCTURED_DEPTH:
+            raise ValueError(
+                f"structured record nesting exceeds {_MAX_STRUCTURED_DEPTH} levels"
+            )
+        value = _embedded_structure(value)
+        if isinstance(value, Mapping):
+            if not value and path:
+                key = separator.join(path)
+                flattened[key] = {}
+                return
+            for child_key, child_value in value.items():
+                normalized_key = normalize_text(str(child_key))
+                if not normalized_key:
+                    raise ValueError("structured record contains an empty field name")
+                visit(child_value, (*path, normalized_key), depth + 1)
+            return
+        key = separator.join(path)
+        if key in flattened:
+            raise ValueError(f"structured record fields collide while flattening: {key}")
+        flattened[key] = _canonical_value(value)
+        if len(flattened) > _MAX_STRUCTURED_FIELDS:
+            raise ValueError(
+                f"structured record exceeds {_MAX_STRUCTURED_FIELDS} flattened fields"
+            )
+
+    for field, value in record.items():
+        field_name = normalize_text(str(field))
+        if not field_name:
+            raise ValueError("structured record contains an empty field name")
+        visit(value, (field_name,), 1)
+    return flattened
+
+def filter_anomalous_structured_records(
+    records: Sequence[Mapping[str, Any]],
+    *,
+    iqr_multiplier: float = 1.5,
+) -> list[dict[str, Any]]:
+    """按字段级数值 IQR、乱码和极端文本长度过滤异常记录。"""
+
+    entries = [
+        ProcessedStructuredRecord(index, deepcopy(dict(record)))
+        for index, record in enumerate(records)
+    ]
+    return [
+        entry.record
+        for entry in _filter_anomalous_structured_entries(
+            entries,
+            iqr_multiplier=iqr_multiplier,
+        )
+    ]
+
+def desensitize_pii(text: str) -> tuple[str, dict[str, int]]:
+    """掩码邮箱、手机号、身份证号及有明确上下文的姓名。"""
+
+    if not isinstance(text, str):
+        raise TypeError("text must be str")
+    counts: dict[str, int] = {"email": 0, "phone": 0, "id_card": 0}
+
+    def replace(pattern: re.Pattern[str], replacement: str, kind: str, value: str) -> str:
+        def replacer(_: re.Match[str]) -> str:
+            counts[kind] += 1
+            return replacement
+
+        return pattern.sub(replacer, value)
+
+    masked = replace(_EMAIL_PATTERN, "[EMAIL]", "email", text)
+    masked = replace(_ID_CARD_PATTERN, "[ID_CARD]", "id_card", masked)
+    masked = replace(_PHONE_PATTERN, "[PHONE]", "phone", masked)
+
+    def replace_context_name(match: re.Match[str]) -> str:
+        counts["name"] = counts.get("name", 0) + 1
+        return f"{match.group('label')}{match.group('separator')}[NAME]"
+
+    masked = _CHINESE_NAME_CONTEXT_PATTERN.sub(replace_context_name, masked)
+    masked = _ENGLISH_NAME_CONTEXT_PATTERN.sub(replace_context_name, masked)
+    counts["total"] = sum(counts.values())
+    return masked, counts
+
+def desensitize_structured_record(
+    record: Mapping[str, Any],
+) -> tuple[dict[str, Any], dict[str, int]]:
+    """递归脱敏结构化姓名字段及任意文本中的手机号、邮箱、身份证号。"""
+
+    if not isinstance(record, Mapping):
+        raise TypeError("record must be a mapping")
+    counts: dict[str, int] = {"email": 0, "phone": 0, "id_card": 0}
+
+    def add_counts(values: Mapping[str, int]) -> None:
+        for kind, count in values.items():
+            if kind != "total" and count:
+                counts[kind] = counts.get(kind, 0) + count
+
+    def visit(value: Any, field: Any = "") -> Any:
+        if isinstance(value, Mapping):
+            return {key: visit(item, key) for key, item in value.items()}
+        if isinstance(value, list):
+            return [visit(item, field) for item in value]
+        if isinstance(value, tuple):
+            return [visit(item, field) for item in value]
+        if _is_name_field(field) and not _is_empty_value(value):
+            counts["name"] = counts.get("name", 0) + 1
+            return "[NAME]"
+        if isinstance(value, str):
+            masked, found = desensitize_pii(value)
+            add_counts(found)
+            return masked
+        return deepcopy(value)
+
+    masked = {key: visit(value, key) for key, value in record.items()}
+    counts["total"] = sum(counts.values())
+    return masked, counts
+
+def preprocess_structured_records_with_lineage(
+    records: Iterable[Mapping[str, Any]],
+    options: Iterable[str] | Mapping[str, Any],
+) -> list[ProcessedStructuredRecord]:
+    """执行结构化预处理，并保留每条结果在原始输入中的稳定索引。"""
+
+    enabled = _structured_options(options)
+    current: list[ProcessedStructuredRecord] = []
+    for source_index, record in enumerate(records):
+        if not isinstance(record, Mapping):
+            if "clean_invalid" in enabled:
+                continue
+            raise TypeError("structured records must contain mappings")
+        value = deepcopy(dict(record))
+        if "detect_structure" in enabled:
+            value = flatten_structured_record(value)
+        if "normalize_format" in enabled:
+            value = normalize_structured_record(value)
+        current.append(ProcessedStructuredRecord(source_index, value))
+
+    if "clean_invalid" in enabled:
+        current = _clean_invalid_structured_entries(current)
+    if "filter_anomaly" in enabled:
+        current = _filter_anomalous_structured_entries(current)
+    if "deduplicate" in enabled:
+        current = _deduplicate_structured_entries(current)
+    if "desensitize" in enabled:
+        current = [
+            ProcessedStructuredRecord(
+                entry.source_index,
+                desensitize_structured_record(entry.record)[0],
+            )
+            for entry in current
+        ]
+    return current
+
+def preprocess_structured_records(
+    records: Iterable[Mapping[str, Any]],
+    options: Iterable[str] | Mapping[str, Any],
+) -> list[dict[str, Any]]:
+    """按界面选项执行确定性、无副作用的结构化数据预处理。"""
+
+    return [
+        entry.record
+        for entry in preprocess_structured_records_with_lineage(records, options)
+    ]
+
+def protected_context_ranges(
+    text: str,
+    *,
+    preserve_code_blocks: bool = True,
+    preserve_tables: bool = True,
+    preserve_lists: bool = True,
+) -> tuple[tuple[int, int], ...]:
+    """返回代码块、表格和列表的不可拆分区间。
+
+    返回的偏移量基于规范化后的文本；调用方应在同一份 ``normalize_text``
+    结果上使用这些区间。
+    """
+
+    normalized = normalize_text(text)
+    return tuple(
+        _protected_markdown_ranges(
+            normalized,
+            preserve_code_blocks=preserve_code_blocks,
+            preserve_tables=preserve_tables,
+            preserve_lists=preserve_lists,
+        )
+    )
+
+def expand_to_context_boundaries(
+    text: str,
+    start: int,
+    end: int,
+    *,
+    preserve_paragraph: bool = True,
+    preserve_code_blocks: bool = True,
+    preserve_tables: bool = True,
+    preserve_lists: bool = True,
+) -> tuple[int, int]:
+    """将一个文本区间扩展到段落及受保护 Markdown 结构边界。"""
+
+    normalized = normalize_text(text)
+    if isinstance(start, bool) or isinstance(end, bool):
+        raise TypeError("start and end must be integers")
+    if not isinstance(start, int) or not isinstance(end, int):
+        raise TypeError("start and end must be integers")
+    if not 0 <= start <= end <= len(normalized):
+        raise ValueError("start and end must define a valid normalized text range")
+
+    expanded_start = start
+    expanded_end = end
+    if preserve_paragraph and normalized:
+        paragraph_start = normalized.rfind("\n\n", 0, start)
+        expanded_start = 0 if paragraph_start < 0 else paragraph_start + 2
+        paragraph_end = normalized.find("\n\n", end)
+        expanded_end = len(normalized) if paragraph_end < 0 else paragraph_end
+
+    ranges = protected_context_ranges(
+        normalized,
+        preserve_code_blocks=preserve_code_blocks,
+        preserve_tables=preserve_tables,
+        preserve_lists=preserve_lists,
+    )
+    changed = True
+    while changed:
+        changed = False
+        for range_start, range_end in ranges:
+            overlaps = range_start < expanded_end and range_end > expanded_start
+            contains_boundary = (
+                range_start <= expanded_start < range_end
+                or range_start < expanded_end <= range_end
+            )
+            if not overlaps and not contains_boundary:
+                continue
+            next_start = min(expanded_start, range_start)
+            next_end = max(expanded_end, range_end)
+            if (next_start, next_end) != (expanded_start, expanded_end):
+                expanded_start, expanded_end = next_start, next_end
+                changed = True
+    return expanded_start, expanded_end
+
+def merge_short_blocks(
+    blocks: Iterable[str],
+    *,
+    min_token_count: int = 100,
+    separator: str = "\n\n",
+) -> list[str]:
+    """按原顺序合并短内容块，并把末尾残块归入前一块。"""
+
+    if isinstance(min_token_count, bool) or not isinstance(min_token_count, int):
+        raise TypeError("min_token_count must be an integer")
+    if min_token_count <= 0:
+        raise ValueError("min_token_count must be greater than 0")
+    if not isinstance(separator, str):
+        raise TypeError("separator must be str")
+
+    merged: list[str] = []
+    pending: list[str] = []
+    pending_tokens = 0
+    for block in blocks:
+        if not isinstance(block, str):
+            raise TypeError("blocks must contain strings")
+        normalized = normalize_text(block)
+        if not normalized:
+            continue
+        token_count = estimate_token_count(normalized)
+        if not pending and token_count >= min_token_count:
+            merged.append(normalized)
+            continue
+        pending.append(normalized)
+        pending_tokens += token_count
+        if pending_tokens >= min_token_count:
+            merged.append(separator.join(pending))
+            pending = []
+            pending_tokens = 0
+
+    if pending:
+        tail = separator.join(pending)
+        if merged:
+            merged[-1] = separator.join((merged[-1], tail))
+        else:
+            merged.append(tail)
+    return merged
+
+def generate_standard_records(
+    preview_items: Iterable[Mapping[str, Any]],
+    *,
+    qa_pairs_per_item: int = 1,
+    semantic_enrichment: bool = False,
+    split: Mapping[str, int] | None = None,
+    split_seed: str = "",
+) -> list[dict[str, Any]]:
+    """把预览内容确定性转换为标准 instruction/input/output 记录。
+
+    该函数只负责本地标准化，不冒充 LLM；服务层可将其作为无模型模式或
+    LLM 响应解析后的统一落库步骤。
+    """
+
+    if not 1 <= qa_pairs_per_item <= MAX_QA_PAIRS_PER_ITEM:
+        raise ValueError(
+            f"qa_pairs_per_item must be in [1, {MAX_QA_PAIRS_PER_ITEM}]"
+        )
+    prefixes = (
+        "请结合实际情况说明：",
+        "请用通俗易懂的方式说明：",
+        "请从实际应用角度说明：",
+        "请简洁自然地说明：",
+        "请详细解答：",
+    )
+    results: list[dict[str, Any]] = []
+    for item_index, item in enumerate(preview_items):
+        content = _preview_content(item)
+        instruction, input_text, output = _standard_fields(content)
+        preview_id = str(item.get("id") or f"preview-{item_index + 1}")
+        for variant_index in range(qa_pairs_per_item):
+            variant_instruction = instruction
+            if variant_index:
+                if semantic_enrichment:
+                    prefix = prefixes[variant_index % len(prefixes)]
+                    if variant_index >= len(prefixes):
+                        prefix = (
+                            f"{prefix.removesuffix('：')}"
+                            f"（问法 {variant_index + 1}）："
+                        )
+                    variant_instruction = f"{prefix}{instruction}"
+                else:
+                    variant_instruction = f"{instruction}(问法 {variant_index + 1})"
+            raw_id = f"{preview_id}:{variant_index + 1}"
+            result_id = f"result_{hashlib.sha256(raw_id.encode('utf-8')).hexdigest()[:16]}"
+            status = "valid" if variant_instruction and output else "invalid"
+            results.append(
+                {
+                    "id": result_id,
+                    "preview_item_id": preview_id,
+                    "instruction": variant_instruction,
+                    "input": input_text,
+                    "output": output,
+                    "original_instruction": variant_instruction,
+                    "original_input": input_text,
+                    "original_output": output,
+                    "status": status,
+                    "split": "train",
+                }
+            )
+    assignments = stable_split_assignments(
+        [str(result["id"]) for result in results],
+        split,
+        seed=split_seed,
+    )
+    for result, assignment in zip(results, assignments, strict=True):
+        result["split"] = assignment
+    return results

backend/app/modules/data_process/algorithms/text_utils.py

@@ -0,0 +1,328 @@
+"""数据处理算法 - 文本处理工具。"""
+
+from __future__ import annotations
+
+import csv
+import io
+import json
+import math
+import re
+import unicodedata
+from datetime import date, datetime, time
+from decimal import Decimal
+from pathlib import Path
+from typing import Any, Literal
+from collections.abc import Mapping
+
+from .types import ParsedText, TextFormat
+
+# 格式别名映射
+_FORMAT_ALIASES: dict[str, TextFormat] = {
+    "json": "json",
+    "jsonl": "jsonl",
+    "ndjson": "jsonl",
+    "csv": "csv",
+    "tsv": "csv",
+    "md": "markdown",
+    "markdown": "markdown",
+    "txt": "txt",
+    "text": "txt",
+    "pdf": "pdf",
+    "docx": "docx",
+    "xlsx": "xlsx",
+    "pptx": "pptx",
+}
+
+# 旧版 Office 格式映射
+_LEGACY_OFFICE_FORMATS: dict[str, str] = {
+    "doc": "docx",
+    "xls": "xlsx",
+    "ppt": "pptx",
+}
+
+# Office Open XML 格式集合
+_OFFICE_OPEN_XML_FORMATS = {"docx", "xlsx", "pptx"}
+
+# 文本提取限制
+_MAX_EXTRACTED_TEXT_CHARS = 20_000_000
+
+def decode_utf8(raw: bytes | bytearray | memoryview | str) -> str:
+    """严格解码 UTF-8 文本，并移除可选 BOM。
+
+    不使用 ``errors='replace'``，避免上传内容损坏后仍被静默接收。
+    """
+
+    if isinstance(raw, str):
+        return raw.removeprefix("\ufeff")
+    if not isinstance(raw, (bytes, bytearray, memoryview)):
+        raise TypeError("raw must be bytes-like or str")
+    try:
+        return bytes(raw).decode("utf-8-sig")
+    except UnicodeDecodeError as exc:
+        raise ValueError(f"content is not valid UTF-8 at byte {exc.start}") from exc
+
+def parse_utf8_text(raw: bytes | bytearray | memoryview | str) -> str:
+    """``decode_utf8`` 的语义化别名，供上传服务直接调用。"""
+
+    return decode_utf8(raw)
+
+def normalize_text(text: str) -> str:
+    """规范 Unicode、换行和行尾空白，同时保留段落结构。"""
+
+    if not isinstance(text, str):
+        raise TypeError("text must be str")
+    normalized = unicodedata.normalize("NFKC", text.removeprefix("\ufeff"))
+    normalized = normalized.replace("\r\n", "\n").replace("\r", "\n")
+    normalized = "".join(
+        char
+        for char in normalized
+        if char in {"\n", "\t"} or not unicodedata.category(char).startswith("C")
+    )
+    lines = [re.sub(r"[\t \f\v]+$", "", line) for line in normalized.split("\n")]
+    return "\n".join(lines).strip()
+
+def _normalize_format(value: str | None) -> TextFormat | None:
+    if value is None:
+        return None
+    normalized = value.strip().lower().removeprefix(".")
+    if normalized in _LEGACY_OFFICE_FORMATS:
+        replacement = _LEGACY_OFFICE_FORMATS[normalized]
+        raise ValueError(
+            f"legacy .{normalized} format is not supported; "
+            f"convert the file to .{replacement} and upload again"
+        )
+    try:
+        return _FORMAT_ALIASES[normalized]
+    except KeyError as exc:
+        raise ValueError(f"unsupported text format: {value}") from exc
+
+def detect_text_format(
+    *,
+    filename: str | None = None,
+    text: str = "",
+    file_format: str | None = None,
+) -> TextFormat:
+    """按显式格式、扩展名和内容特征依次识别文本格式。"""
+
+    explicit = _normalize_format(file_format)
+    if explicit:
+        return explicit
+
+    if filename:
+        suffix = Path(filename).suffix.lower().removeprefix(".")
+        if suffix in _LEGACY_OFFICE_FORMATS:
+            replacement = _LEGACY_OFFICE_FORMATS[suffix]
+            raise ValueError(
+                f"legacy .{suffix} format is not supported; "
+                f"convert the file to .{replacement} and upload again"
+            )
+        detected = _FORMAT_ALIASES.get(suffix)
+        if detected:
+            return detected
+
+    stripped = text.strip()
+    if stripped:
+        if stripped[0] in "[{":
+            try:
+                json.loads(stripped)
+            except json.JSONDecodeError:
+                pass
+            else:
+                return "json"
+
+        nonempty_lines = [line for line in stripped.splitlines() if line.strip()]
+        if len(nonempty_lines) > 1:
+            try:
+                for line in nonempty_lines:
+                    json.loads(line)
+            except json.JSONDecodeError:
+                pass
+            else:
+                return "jsonl"
+
+        if re.search(r"(?m)^(?:#{1,6}\s+|```|~~~)", stripped) or re.search(
+            r"(?m)^\s*\|.+\|\s*$", stripped
+        ):
+            return "markdown"
+
+        sample = stripped[:8192]
+        try:
+            dialect = csv.Sniffer().sniff(sample, delimiters=",\t;")
+            rows = list(csv.reader(io.StringIO(sample), dialect))
+            if len(rows) >= 2 and len(rows[0]) >= 2:
+                return "csv"
+        except csv.Error:
+            pass
+
+    return "txt"
+
+def _append_bounded_text(parts: list[str], value: Any, total: int) -> int:
+    text = normalize_text(str(value or ""))
+    if not text:
+        return total
+    total += len(text)
+    if total > _MAX_EXTRACTED_TEXT_CHARS:
+        raise ValueError(
+            f"extracted document text exceeds {_MAX_EXTRACTED_TEXT_CHARS} characters"
+        )
+    parts.append(text)
+    return total
+
+def _normalize_spreadsheet_value(value: Any) -> Any:
+    if value is None:
+        return ""
+    if isinstance(value, str):
+        return normalize_text(value)
+    if isinstance(value, (datetime, date, time)):
+        return value.isoformat()
+    if isinstance(value, (bool, int, float)):
+        return value
+    return normalize_text(str(value))
+
+def _normalize_value(value: Any) -> Any:
+    if isinstance(value, str):
+        return normalize_text(value)
+    if isinstance(value, Mapping):
+        return {normalize_text(str(key)): _normalize_value(item) for key, item in value.items()}
+    if isinstance(value, list):
+        return [_normalize_value(item) for item in value]
+    return value
+
+def parse_text_content(
+    raw: bytes | bytearray | memoryview | str,
+    *,
+    filename: str | None = None,
+    file_format: str | None = None,
+) -> ParsedText:
+    """安全解析 UTF-8 文本、文本型 PDF 和现代 Office 文件。"""
+
+    # 解析器依赖 text_utils（normalize_text 等），这里延迟导入以断开循环依赖。
+    from .parsers.json_parser import _extract_structured_records_with_locators
+    from .parsers.office import _extract_docx_text, _extract_pptx_text, _extract_xlsx_records
+    from .parsers.pdf import _extract_pdf_text
+
+    detected_format = detect_text_format(
+        filename=filename,
+        text="",
+        file_format=file_format,
+    )
+    if detected_format in _OFFICE_OPEN_XML_FORMATS or detected_format == "pdf":
+        binary = _binary_bytes(raw, detected_format)
+        if detected_format == "pdf":
+            text = _extract_pdf_text(binary)
+            return ParsedText(format=detected_format, text=text, records=())
+        if detected_format == "docx":
+            text = _extract_docx_text(binary)
+            return ParsedText(format=detected_format, text=text, records=())
+        if detected_format == "pptx":
+            text = _extract_pptx_text(binary)
+            return ParsedText(format=detected_format, text=text, records=())
+
+        records, record_locators = _extract_xlsx_records(binary)
+        text = "\n".join(
+            json.dumps(record, ensure_ascii=False, separators=(",", ":"))
+            for record in records
+        )
+        return ParsedText(
+            format=detected_format,
+            text=normalize_text(text),
+            records=tuple(records),
+            record_locators=tuple(record_locators),
+        )
+
+    decoded_text = decode_utf8(raw)
+    detected_format = detect_text_format(
+        filename=filename,
+        text=decoded_text,
+        file_format=file_format,
+    )
+    # JSON/JSONL 是有损规范化的禁区：NFKC、控制字符删除或 trim 都可能改变字段值、
+    # 掩盖非法输入，甚至把原本合法的字符串变成语法错误。其他格式保持历史行为。
+    text = (
+        decoded_text
+        if detected_format in {"json", "jsonl"}
+        else normalize_text(decoded_text)
+    )
+    records: list[dict[str, Any]] = []
+    record_locators: list[dict[str, Any]] = []
+    if detected_format in {"json", "jsonl", "csv"}:
+        records, record_locators = _extract_structured_records_with_locators(
+            text,
+            detected_format,
+        )
+    return ParsedText(
+        format=detected_format,
+        text=text,
+        records=tuple(records),
+        record_locators=tuple(record_locators),
+    )
+
+def _normalize_field_name(value: Any, style: str) -> str:
+    name = normalize_text(str(value))
+    if style == "preserve":
+        return name
+    if style == "lower":
+        return name.lower()
+    if style != "snake_case":
+        raise ValueError("field_name_style must be snake_case, lower or preserve")
+    name = re.sub(r"(?<=[a-z0-9])(?=[A-Z])", "_", name)
+    name = re.sub(r"[^\w\u3400-\u4dbf\u4e00-\u9fff]+", "_", name, flags=re.UNICODE)
+    return re.sub(r"_+", "_", name).strip("_").lower()
+
+def structured_json_dumps(value: Any, *, sort_keys: bool = False) -> str:
+    """序列化紧凑 JSON，并把 ``Decimal`` 保持为原值对应的 JSON 数字。
+
+    标准库会要求先把 ``Decimal`` 转成 float 或字符串；前者可能静默舍入，
+    后者会改变 JSON 类型。这里直接输出有限 Decimal 的十进制表示。
+    """
+
+    def serialize(item: Any) -> str:
+        if item is None:
+            return "null"
+        if item is True:
+            return "true"
+        if item is False:
+            return "false"
+        if isinstance(item, int):
+            return str(item)
+        if isinstance(item, Decimal):
+            if not item.is_finite():
+                raise ValueError("non-finite JSON number is not allowed")
+            return str(item)
+        if isinstance(item, float):
+            if not math.isfinite(item):
+                raise ValueError("non-finite JSON number is not allowed")
+            return json.dumps(item, allow_nan=False)
+        if isinstance(item, str):
+            return json.dumps(item, ensure_ascii=False)
+        if isinstance(item, Mapping):
+            pairs: list[tuple[str, Any]] = []
+            seen_keys: set[str] = set()
+            for key, child in item.items():
+                if not isinstance(key, str):
+                    raise TypeError("JSON object keys must be strings")
+                if key in seen_keys:
+                    raise ValueError(f"duplicate JSON object key: {key!r}")
+                seen_keys.add(key)
+                pairs.append((key, child))
+            if sort_keys:
+                pairs.sort(key=lambda pair: pair[0])
+            return "{" + ",".join(
+                f"{json.dumps(key, ensure_ascii=False)}:{serialize(child)}"
+                for key, child in pairs
+            ) + "}"
+        if isinstance(item, (list, tuple)):
+            return "[" + ",".join(serialize(child) for child in item) + "]"
+        raise TypeError(f"value of type {type(item).__name__} is not JSON serializable")
+
+    return serialize(value)
+
+def _binary_bytes(
+    raw: bytes | bytearray | memoryview | str,
+    file_format: TextFormat,
+) -> bytes:
+    if isinstance(raw, str):
+        raise ValueError(f"{file_format.upper()} content must be uploaded as binary data")
+    if not isinstance(raw, (bytes, bytearray, memoryview)):
+        raise TypeError("raw must be bytes-like or str")
+    return bytes(raw)

backend/app/modules/data_process/algorithms/transforms.py

@@ -0,0 +1,81 @@
+"""数据处理算法 - 数据集转换和分割。"""
+
+from __future__ import annotations
+
+import hashlib
+import math
+from collections.abc import Mapping, Sequence
+
+from .types import DatasetSplit
+
+
+def stable_split(
+    value: str | int,
+    split: Mapping[str, int] | None = None,
+    *,
+    seed: str = "",
+) -> DatasetSplit:
+    """按稳定哈希将记录划分到 train/validation/test。"""
+
+    ratios = dict(split or {"train": 80, "validation": 10, "test": 10})
+    required = {"train", "validation", "test"}
+    if set(ratios) != required:
+        raise ValueError("split must contain exactly train, validation and test")
+    if any(isinstance(value, bool) or not isinstance(value, int) or value < 0 for value in ratios.values()):
+        raise ValueError("split ratios must be non-negative integers")
+    if sum(ratios.values()) != 100:
+        raise ValueError("split ratios must sum to 100")
+
+    digest = hashlib.sha256(f"{seed}:{value}".encode("utf-8")).digest()
+    bucket = int.from_bytes(digest[:8], "big") % 10_000
+    train_boundary = ratios["train"] * 100
+    validation_boundary = train_boundary + ratios["validation"] * 100
+    if bucket < train_boundary:
+        return "train"
+    if bucket < validation_boundary:
+        return "validation"
+    return "test"
+
+def stable_split_assignments(
+    values: Sequence[str | int],
+    split: Mapping[str, int] | None = None,
+    *,
+    seed: str = "",
+) -> list[DatasetSplit]:
+    """按稳定顺序和精确配额批量划分数据集。
+
+    单条哈希分桶只能在大样本下近似比例。这里先按哈希稳定排序，再用
+    最大余数法计算各切分配额，确保小数据集也严格遵循配置比例。
+    """
+
+    ratios = dict(split or {"train": 80, "validation": 10, "test": 10})
+    # 复用单条划分的参数校验，避免两套规则逐渐漂移。
+    stable_split("validation", ratios, seed=seed)
+    if not values:
+        return []
+
+    split_order: tuple[DatasetSplit, ...] = ("train", "validation", "test")
+    exact = {name: len(values) * ratios[name] / 100 for name in split_order}
+    quotas = {name: math.floor(exact[name]) for name in split_order}
+    remaining = len(values) - sum(quotas.values())
+    remainder_order = sorted(
+        split_order,
+        key=lambda name: (-(exact[name] - quotas[name]), split_order.index(name)),
+    )
+    for name in remainder_order[:remaining]:
+        quotas[name] += 1
+
+    ranked_indices = sorted(
+        range(len(values)),
+        key=lambda index: (
+            hashlib.sha256(f"{seed}:{values[index]}".encode("utf-8")).digest(),
+            index,
+        ),
+    )
+    assignments: list[DatasetSplit] = ["train"] * len(values)
+    cursor = 0
+    for name in split_order:
+        for index in ranked_indices[cursor : cursor + quotas[name]]:
+            assignments[index] = name
+        cursor += quotas[name]
+    return assignments

backend/app/modules/data_process/algorithms/types.py

@@ -0,0 +1,266 @@
+"""数据处理模块使用的无副作用算法。
+
+本模块不访问数据库、文件系统或网络，便于 API、后台任务和测试共同复用。
+所有偏移量均为 Python 字符串偏移量。
+"""
+
+from __future__ import annotations
+
+import csv
+import hashlib
+import io
+import json
+import math
+import re
+import unicodedata
+import xml.etree.ElementTree as ET
+import zipfile
+from collections import Counter
+from collections.abc import Iterable, Mapping, Sequence
+from copy import deepcopy
+from dataclasses import dataclass
+from datetime import date, datetime, time
+from decimal import Decimal
+from pathlib import Path, PurePosixPath
+from typing import Any, Literal
+from urllib.parse import unquote, urlsplit
+
+from docx import Document
+from docx.oxml.table import CT_Tbl
+from docx.oxml.text.paragraph import CT_P
+from docx.table import Table
+from docx.text.paragraph import Paragraph
+from openpyxl import load_workbook
+from openpyxl.utils.cell import range_boundaries
+from pptx import Presentation
+from pypdf import PdfReader
+
+# 避免循环导入：直接定义常量而不是从 constants 导入
+MAX_QA_PAIRS_PER_ITEM = 50
+
+TextFormat = Literal[
+    "json",
+    "jsonl",
+    "csv",
+    "markdown",
+    "txt",
+    "pdf",
+    "docx",
+    "xlsx",
+    "pptx",
+]
+DatasetSplit = Literal["train", "validation", "test"]
+StructuredPreprocessOption = Literal[
+    "clean_invalid",
+    "detect_structure",
+    "deduplicate",
+    "normalize_format",
+    "filter_anomaly",
+    "desensitize",
+]
+
+SUPPORTED_TEXT_FORMATS: tuple[TextFormat, ...] = (
+    "json",
+    "jsonl",
+    "csv",
+    "markdown",
+    "txt",
+    "pdf",
+    "docx",
+    "xlsx",
+    "pptx",
+)
+
+_FORMAT_ALIASES: dict[str, TextFormat] = {
+    "json": "json",
+    "jsonl": "jsonl",
+    "ndjson": "jsonl",
+    "csv": "csv",
+    "tsv": "csv",
+    "md": "markdown",
+    "markdown": "markdown",
+    "txt": "txt",
+    "text": "txt",
+    "pdf": "pdf",
+    "docx": "docx",
+    "xlsx": "xlsx",
+    "pptx": "pptx",
+}
+_LEGACY_OFFICE_FORMATS: dict[str, str] = {
+    "doc": "docx",
+    "xls": "xlsx",
+    "ppt": "pptx",
+}
+_OFFICE_OPEN_XML_FORMATS = {"docx", "xlsx", "pptx"}
+_MAX_ARCHIVE_ENTRIES = 10_000
+_MAX_ARCHIVE_UNCOMPRESSED_BYTES = 512 * 1024 * 1024
+_MAX_ARCHIVE_ENTRY_BYTES = 128 * 1024 * 1024
+_MAX_ARCHIVE_COMPRESSION_RATIO = 200
+_MAX_EXTRACTED_TEXT_CHARS = 20_000_000
+_MAX_PDF_PAGES = 2_000
+_MAX_PRESENTATION_SLIDES = 2_000
+_MAX_WORKBOOK_SHEETS = 100
+_MAX_WORKBOOK_ROWS = 100_000
+_MAX_WORKBOOK_SCANNED_ROWS = 200_000
+_MAX_WORKBOOK_COLUMNS = 256
+_MAX_WORKBOOK_CELLS = 2_000_000
+_MAX_WORKBOOK_HEADER_ROWS = 8
+_MAX_WORKBOOK_HEADER_SCAN_ROWS = 64
+_MAX_WORKBOOK_MERGED_RANGES = 100_000
+_MAX_STRUCTURED_FIELDS = 1_024
+_MAX_STRUCTURED_DEPTH = 16
+_MAX_JSON_DEPTH = 64
+_MAX_ANOMALY_TEXT_CHARS = 1_000_000
+_STRUCTURED_OPTIONS = {
+    "clean_invalid",
+    "detect_structure",
+    "deduplicate",
+    "normalize_format",
+    "filter_anomaly",
+    "desensitize",
+}
+_IDENTITY_FIELD_PATTERN = re.compile(r"(?:^|[._])(?:id|uuid|key|code)$|(?:^|[._]).+_id$")
+_MOJIBAKE_MARKERS = ("\ufffd", "锟斤拷", "烫烫烫", "屯屯屯", "Ã", "Â", "â€")
+_JSON_RECORD_ARRAY_KEYS = ("records", "data", "items", "rows")
+_JSON_ENVELOPE_KEYS = ("response", "payload")
+_JSON_WRAPPER_METADATA_KEYS = frozenset(
+    {
+        "page",
+        "page_size",
+        "pageSize",
+        "per_page",
+        "perPage",
+        "total",
+        "total_count",
+        "totalCount",
+        "count",
+        "offset",
+        "limit",
+        "cursor",
+        "next_cursor",
+        "nextCursor",
+        "has_more",
+        "hasMore",
+    }
+)
+_JSON_RESPONSE_METADATA_KEYS = _JSON_WRAPPER_METADATA_KEYS | {
+    "success",
+    "status",
+    "code",
+    "message",
+    "error",
+}
+_NAME_FIELD_NAMES = {
+    "name",
+    "full_name",
+    "fullname",
+    "real_name",
+    "contact_name",
+    "customer_name",
+    "recipient_name",
+    "姓名",
+    "中文姓名",
+    "真实姓名",
+    "联系人",
+    "联系人姓名",
+    "客户姓名",
+    "收件人",
+    "收件人姓名",
+}
+
+_EMAIL_PATTERN = re.compile(
+    r"(?<![\w.+-])[A-Za-z0-9.!#$%&'*+/=?^_`{|}~-]+"
+    r"@[A-Za-z0-9](?:[A-Za-z0-9-]{0,61}[A-Za-z0-9])?"
+    r"(?:\.[A-Za-z0-9](?:[A-Za-z0-9-]{0,61}[A-Za-z0-9])?)+(?![\w.-])"
+)
+_PHONE_PATTERN = re.compile(r"(?<!\d)(?:(?:\+|00)?86[-\s]?)?1[3-9]\d{9}(?!\d)")
+_ID_CARD_PATTERN = re.compile(r"(?<!\d)(?:\d{17}[\dXx]|\d{15})(?!\d)")
+_CHINESE_NAME_CONTEXT_PATTERN = re.compile(
+    r"(?P<label>姓名|真实姓名|联系人(?:姓名)?|收件人)"
+    r"(?P<separator>\s*(?:[:：=]|为)\s*|\s+)"
+    r"(?P<name>[\u3400-\u4dbf\u4e00-\u9fff·]{2,8})"
+)
+_ENGLISH_NAME_CONTEXT_PATTERN = re.compile(
+    r"(?im)(?P<label>full\s+name|contact\s+name|name)"
+    r"(?P<separator>\s*[:=]\s*)"
+    r"(?P<name>[A-Za-z][A-Za-z'’-]*(?:[ \t]+[A-Za-z][A-Za-z'’-]*){0,3})"
+)
+_TOKEN_PATTERN = re.compile(r"[\u3400-\u4dbf\u4e00-\u9fff]|[A-Za-z0-9_]+|[^\s]")
+
+
+@dataclass(frozen=True, slots=True)
+class ParsedText:
+    """文本、文档或工作簿的统一解析结果。"""
+
+    format: TextFormat
+    text: str
+    records: tuple[dict[str, Any], ...]
+    record_locators: tuple[dict[str, Any], ...] = ()
+
+@dataclass(frozen=True, slots=True)
+class ProcessedStructuredRecord:
+    """保留原始记录索引的结构化预处理结果。"""
+
+    source_index: int
+    record: dict[str, Any]
+
+@dataclass(frozen=True, slots=True)
+class PdfPageText:
+    """PDF 物理页在统一提取文本中的字符范围。"""
+
+    page_number: int
+    text: str
+    source_start: int
+    source_end: int
+
+@dataclass(frozen=True, slots=True)
+class DocumentNoiseSpan:
+    """PDF 中可安全从展示内容移除的文本范围。"""
+
+    start: int
+    end: int
+    kind: Literal["page_number", "repeated_margin", "table_of_contents"]
+
+@dataclass(frozen=True, slots=True)
+class QualityScore:
+    """标准 instruction/input/output 记录的可解释质量分。"""
+
+    overall: float
+    completeness: float
+    length: float
+    readability: float
+    relevance: float
+    duplicate: float
+    is_valid: bool
+    flags: tuple[str, ...]
+    fingerprint: str
+
+@dataclass(frozen=True, slots=True)
+class DocumentHeading:
+    """文档标题的位置和层级。"""
+
+    level: int
+    title: str
+    line_number: int
+    start: int
+    end: int
+
+@dataclass(frozen=True, slots=True)
+class DocumentStructure:
+    """无需外部模型即可复现的文档结构摘要。"""
+
+    line_count: int
+    paragraph_count: int
+    headings: tuple[DocumentHeading, ...]
+    code_block_count: int
+    table_block_count: int
+    list_block_count: int
+
+@dataclass(frozen=True, slots=True)
+class _PdfLine:
+    text: str
+    start: int
+    end: int
+
+class _DuplicateJsonKeyError(ValueError):
+    """严格 JSON 解析时发现同一对象内的重复键。"""

backend/app/modules/data_process/constants.py

@@ -0,0 +1,7 @@
+"""数据处理模块的共享限制。"""
+
+MAX_QA_PAIRS_PER_ITEM = 50
+MODEL_GENERATION_BATCH_SIZE = 10
+
+
+__all__ = ["MAX_QA_PAIRS_PER_ITEM", "MODEL_GENERATION_BATCH_SIZE"]

backend/app/modules/data_process/dataset_format.py

@@ -0,0 +1,158 @@
+"""Dataset format validation for Alpaca, ShareGPT, DPO, CPT formats.
+
+Used by the training preflight flow to validate that uploaded dataset files
+conform to the declared format before submitting to the compute node.
+"""
+
+from __future__ import annotations
+
+import json
+from typing import Any
+
+
+def _load_sample(path: str | None, content: str | None = None, max_samples: int = 20) -> list[dict[str, Any]]:
+    """Load up to max_samples records from JSONL file path or raw content string."""
+    try:
+        if content is not None:
+            text = content.strip()
+        elif path:
+            with open(path, "r", encoding="utf-8") as fh:
+                text = fh.read().strip()
+        else:
+            return []
+    except Exception:
+        return []
+
+    if not text:
+        return []
+
+    # 先按整文件 JSON（数组/单对象）解析，兼容 .json；失败再按 jsonl 逐行解析
+    try:
+        value = json.loads(text)
+    except json.JSONDecodeError:
+        value = None
+    if isinstance(value, list):
+        return [item for item in value[:max_samples] if isinstance(item, dict)]
+    if isinstance(value, dict):
+        return [value]
+
+    lines = text.splitlines()[:max_samples]
+    records: list[dict[str, Any]] = []
+    for line in lines:
+        line = line.strip()
+        if not line:
+            continue
+        try:
+            record = json.loads(line)
+        except json.JSONDecodeError:
+            continue
+        if isinstance(record, dict):
+            records.append(record)
+    return records
+
+
+def _check_alpaca(records: list[dict[str, Any]]) -> list[str]:
+    """Validate Alpaca format: requires 'instruction' field."""
+    errors: list[str] = []
+    if not records:
+        errors.append("Alpaca 格式数据集无有效记录")
+        return errors
+    missing_instruction = sum(1 for r in records if not r.get("instruction"))
+    if missing_instruction:
+        errors.append(
+            f"Alpaca 格式要求每条记录包含 instruction 字段，"
+            f"前{len(records)}条中有{missing_instruction}条缺失"
+        )
+    return errors
+
+
+def _check_sharegpt(records: list[dict[str, Any]]) -> list[str]:
+    """Validate ShareGPT format: requires 'messages' (list of dicts with role/content)."""
+    errors: list[str] = []
+    if not records:
+        errors.append("ShareGPT 格式数据集无有效记录")
+        return errors
+    bad = 0
+    for r in records:
+        messages = r.get("messages")
+        if not isinstance(messages, list) or not messages:
+            bad += 1
+            continue
+        for msg in messages:
+            if not isinstance(msg, dict) or "role" not in msg or "content" not in msg:
+                bad += 1
+                break
+    if bad:
+        errors.append(
+            f"ShareGPT 格式要求每条记录包含 messages 列表，"
+            f"每条消息需有 role 和 content 字段，前{len(records)}条中有{bad}条不符合"
+        )
+    return errors
+
+
+def _check_dpo(records: list[dict[str, Any]]) -> list[str]:
+    """Validate DPO format: requires 'chosen' and 'rejected' fields."""
+    errors: list[str] = []
+    if not records:
+        errors.append("DPO 格式数据集无有效记录")
+        return errors
+    missing_chosen = sum(1 for r in records if not r.get("chosen"))
+    missing_rejected = sum(1 for r in records if not r.get("rejected"))
+    if missing_chosen:
+        errors.append(f"DPO 格式要求 chosen 字段，前{len(records)}条中有{missing_chosen}条缺失")
+    if missing_rejected:
+        errors.append(f"DPO 格式要求 rejected 字段，前{len(records)}条中有{missing_rejected}条缺失")
+    return errors
+
+
+def _check_cpt(records: list[dict[str, Any]]) -> list[str]:
+    """Validate CPT format: requires 'text' field, should NOT have instruction/output."""
+    errors: list[str] = []
+    if not records:
+        errors.append("CPT 格式数据集无有效记录")
+        return errors
+    missing_text = sum(1 for r in records if not r.get("text"))
+    has_instruction = sum(1 for r in records if r.get("instruction") or r.get("output"))
+    if missing_text:
+        errors.append(f"CPT 格式要求 text 字段，前{len(records)}条中有{missing_text}条缺失")
+    if has_instruction:
+        errors.append(
+            f"CPT 格式不应包含 instruction/output 字段（疑似 Alpaca 格式），"
+            f"前{len(records)}条中有{has_instruction}条包含此类字段"
+        )
+    return errors
+
+
+FORMAT_VALIDATORS = {
+    "alpaca": _check_alpaca,
+    "alpaca_jsonl": _check_alpaca,
+    "sharegpt": _check_sharegpt,
+    "dpo": _check_dpo,
+    "cpt": _check_cpt,
+    "pt": _check_cpt,
+}
+
+
+def validate_dataset_format(
+    dataset_format: str,
+    content: str | None = None,
+    path: str | None = None,
+    max_samples: int = 20,
+) -> list[str]:
+    """Validate dataset content against expected format.
+
+    Args:
+        dataset_format: One of 'alpaca', 'sharegpt', 'dpo', 'cpt'.
+        content: Raw file content (JSONL text). Mutually exclusive with path.
+        path: File path to read content from.
+        max_samples: Maximum records to sample for validation.
+
+    Returns:
+        List of error messages (empty if valid).
+    """
+    fmt = str(dataset_format).lower().strip()
+    validator = FORMAT_VALIDATORS.get(fmt)
+    if not validator:
+        return [f"不支持的数据集格式: {dataset_format}，支持的格式: {', '.join(sorted(FORMAT_VALIDATORS))}"]
+    records = _load_sample(path=path, content=content, max_samples=max_samples)
+    return validator(records)

backend/app/modules/data_process/document_chunking.py

@@ -0,0 +1,693 @@
+"""基于 Docling 与 LlamaIndex 的文档切分实现。"""
+
+from __future__ import annotations
+
+import logging
+import re
+import threading
+import time
+import unicodedata
+from dataclasses import dataclass
+from functools import lru_cache
+from io import BytesIO
+from typing import Any, Literal
+
+import tiktoken
+from docling_core.transforms.chunker.hierarchical_chunker import ChunkingSerializerProvider
+from llama_index.core import Document
+from llama_index.core.base.embeddings.base import BaseEmbedding
+from llama_index.core.node_parser import SemanticSplitterNodeParser, SentenceSplitter
+
+from app.modules.data_process.algorithms import normalize_text
+from app.modules.data_process.algorithms.embedding import semantic_embedding_model
+
+ChunkMethod = Literal["layout_hybrid", "semantic", "fixed"]
+
+_PAGE_FURNITURE = re.compile(
+    r"(?m)^\s*(?:第\s*\d+\s*页\s*共\s*\d+\s*页|[-—–]?\s*\d+\s*[/／]\s*\d+\s*[-—–]?)\s*$"
+)
+# Docling 的 markdown 序列化会给列表项补上自动编号，而 Word 的编号存放在
+# numbering.xml 中，python-docx 抽取的正文不含这些编号；紧凑匹配前剥掉
+# 行首编号，否则带列表的切片会整体定位失败。
+_LIST_MARKER_PREFIX = re.compile(
+    r"(?m)^[ \t>]*(?:(?:\d{1,3}[.)])+|\([a-zA-Z0-9]{1,3}\)|[a-zA-Z][.)]|[-*+•·])[ \t]+"
+)
+_COMPACT_CHARACTER = re.compile(r"[\w\u3400-\u4dbf\u4e00-\u9fff]", re.UNICODE)
+_CONVERTER_LOCK = threading.Lock()
+
+logger = logging.getLogger(__name__)
+
+
+@dataclass(frozen=True, slots=True)
+class DocumentChunk:
+    """切片正文及其在原文件中的可追溯信息。"""
+
+    original_content: str
+    contextualized_content: str
+    source_start: int | None
+    source_end: int | None
+    source_start_line: int | None
+    source_end_line: int | None
+    token_count: int
+    heading_path: tuple[str, ...] = ()
+    source_pages: tuple[int, ...] = ()
+    doc_item_refs: tuple[str, ...] = ()
+    source_bboxes: tuple[dict[str, Any], ...] = ()
+
+
+def _sentence_chunks(text: str) -> list[str]:
+    """提供稳定的中英文句界，避免 LlamaIndex 默认分词器下载额外资源。"""
+
+    boundary = re.compile(
+        r".*?(?:\n\s*\n|[。！？!?；;](?:[\"'”’）】》]*)|\.(?:\s+|$)|$)",
+        re.DOTALL,
+    )
+    return [part for part in boundary.findall(text) if part]
+
+
+@lru_cache(maxsize=1)
+def _tokenizer() -> tiktoken.Encoding:
+    """加载 cl100k_base 编码器，优先在线下载，失败时使用本地缓存以支持离线环境。"""
+    import base64
+
+    from app.core.cache_paths import tiktoken_cache_dir
+
+    # 缓存目录已在 app.core.cache_paths.setup_local_caches 中统一指向 <repo>/.cache/tiktoken，
+    # 此处直接读取；TIKTOKEN_CACHE_DIR 已在启动阶段写入。
+    offline_cache = tiktoken_cache_dir()
+
+    try:
+        # 尝试标准方式加载（环境变量 TIKTOKEN_CACHE_DIR 已被统一设置）
+        return tiktoken.get_encoding("cl100k_base")
+    except Exception:
+        # 如果失败，尝试手动从本地文件构造
+        try:
+            local_file = offline_cache / "9b5ad71b2ce5302211f9c61530b329a4922fc6a4"
+            if not local_file.exists():
+                # 尝试另一个可能的文件名
+                local_file = offline_cache / "cl100k_base.tiktoken"
+
+            if local_file.exists():
+                # 读取 BPE 文件内容
+                with open(local_file, "rb") as f:
+                    contents = f.read()
+
+                # 解析 BPE 文件
+                mergeable_ranks = {}
+                for line in contents.splitlines():
+                    if line:
+                        token, rank = line.split()
+                        mergeable_ranks[base64.b64decode(token)] = int(rank)
+
+                # 构造 Encoding 对象（模块顶部已 import tiktoken，
+                # 此处不能再 import tiktoken.core，否则会把 tiktoken
+                # 变成局部变量，使函数开头的 tiktoken.get_encoding 抛
+                # UnboundLocalError）
+                return tiktoken.core.Encoding(
+                    name="cl100k_base",
+                    pat_str=r"""'(?i:[sdmt]|ll|ve|re)|[^\r\n\p{L}\p{N}]?+\p{L}+|\p{N}{1,3}| ?[^\s\p{L}\p{N}]++[\r\n]*|\s*[\r\n]|\s+(?!\S)|\s+""",
+                    mergeable_ranks=mergeable_ranks,
+                    special_tokens={
+                        "": 100257,
+                        "<|fim_prefix|>": 100258,
+                        "<|fim_middle|>": 100259,
+                        "<|fim_suffix|>": 100260,
+                        "<|endofprompt|>": 100276,
+                    },
+                )
+        except Exception:
+            pass
+
+        raise RuntimeError(
+            f"无法加载 cl100k_base 编码器\n"
+            f"请确保以下任一条件满足:\n"
+            f"1. 服务器可以访问网络\n"
+            f"2. 本地存在缓存文件: {offline_cache}/9b5ad71b2ce5302211f9c61530b329a4922fc6a4"
+        )
+
+
+def _text_chunks(
+    text: str,
+    *,
+    chunk_size: int,
+    chunk_overlap: int,
+) -> list[DocumentChunk]:
+    normalized = normalize_text(text)
+    if not normalized:
+        return []
+    splitter = SentenceSplitter(
+        chunk_size=chunk_size,
+        chunk_overlap=chunk_overlap,
+        tokenizer=_tokenizer().encode,
+        chunking_tokenizer_fn=_sentence_chunks,
+        include_metadata=False,
+        include_prev_next_rel=False,
+    )
+    nodes = splitter.get_nodes_from_documents([Document(text=normalized)])
+    return _nodes_to_chunks(nodes, normalized)
+
+
+def chunk_fixed_text(
+    text: str,
+    *,
+    chunk_size: int,
+    chunk_overlap: int,
+) -> list[DocumentChunk]:
+    """使用 LlamaIndex SentenceSplitter 按句界控制固定 Token 长度。"""
+
+    return _text_chunks(text, chunk_size=chunk_size, chunk_overlap=chunk_overlap)
+
+
+def chunk_semantic_text(
+    text: str,
+    *,
+    chunk_size: int,
+    chunk_overlap: int,
+    breakpoint_percentile_threshold: int,
+    embed_model: BaseEmbedding | None = None,
+) -> list[DocumentChunk]:
+    """使用 LlamaIndex SemanticSplitter 识别主题跳变，再限制最大长度。"""
+
+    normalized = normalize_text(text)
+    if not normalized:
+        return []
+    splitter = SemanticSplitterNodeParser.from_defaults(
+        embed_model=embed_model or semantic_embedding_model(),
+        breakpoint_percentile_threshold=breakpoint_percentile_threshold,
+        buffer_size=1,
+        sentence_splitter=_sentence_chunks,
+        include_metadata=False,
+        include_prev_next_rel=False,
+    )
+    semantic_nodes = splitter.get_nodes_from_documents([Document(text=normalized)])
+    result: list[DocumentChunk] = []
+    search_from = 0
+    for node in semantic_nodes:
+        content = node.get_content().strip()
+        if not content:
+            continue
+        start = _locate_text(normalized, content, search_from)
+        if start is None:
+            start = _locate_text(normalized, content, 0)
+        if start is None:
+            result.append(_unlocated_chunk(content))
+            continue
+        if len(_tokenizer().encode(content)) <= chunk_size:
+            result.append(_make_text_chunk(normalized, start, start + len(content)))
+        else:
+            for child in _text_chunks(
+                content,
+                chunk_size=chunk_size,
+                chunk_overlap=chunk_overlap,
+            ):
+                if child.source_start is None or child.source_end is None:
+                    result.append(_unlocated_chunk(child.original_content))
+                    continue
+                result.append(
+                    _make_text_chunk(
+                        normalized,
+                        start + child.source_start,
+                        start + child.source_end,
+                    )
+                )
+        search_from = start + len(content)
+    return result
+
+
+def _nodes_to_chunks(nodes: list[Any], source_text: str) -> list[DocumentChunk]:
+    chunks: list[DocumentChunk] = []
+    search_from = 0
+    for node in nodes:
+        content = node.get_content().strip()
+        if not content:
+            continue
+        raw_start = getattr(node, "start_char_idx", None)
+        raw_end = getattr(node, "end_char_idx", None)
+        if (
+            isinstance(raw_start, int)
+            and isinstance(raw_end, int)
+            and source_text[raw_start:raw_end].strip() == content
+        ):
+            start = raw_start + len(source_text[raw_start:raw_end]) - len(source_text[raw_start:raw_end].lstrip())
+        else:
+            start = _locate_text(source_text, content, search_from)
+            if start is None:
+                start = _locate_text(source_text, content, 0)
+        if start is None:
+            chunks.append(_unlocated_chunk(content))
+            continue
+        end = start + len(content)
+        chunks.append(_make_text_chunk(source_text, start, end))
+        search_from = max(search_from, end)
+    return chunks
+
+
+def _locate_text(source: str, content: str, start: int) -> int | None:
+    position = source.find(content, start)
+    return position if position >= 0 else None
+
+
+def _unlocated_chunk(content: str) -> DocumentChunk:
+    """正文在源文本中定位失败时保底保留切片，只放弃行号信息。"""
+
+    return DocumentChunk(
+        original_content=content,
+        contextualized_content=content,
+        source_start=None,
+        source_end=None,
+        source_start_line=None,
+        source_end_line=None,
+        token_count=len(_tokenizer().encode(content)),
+    )
+
+
+def _make_text_chunk(source: str, start: int, end: int) -> DocumentChunk:
+    content = source[start:end]
+    return DocumentChunk(
+        original_content=content,
+        contextualized_content=content,
+        source_start=start,
+        source_end=end,
+        source_start_line=source.count("\n", 0, start) + 1,
+        source_end_line=source.count("\n", 0, max(start, end - 1)) + 1,
+        token_count=len(_tokenizer().encode(content)),
+    )
+
+
+@lru_cache(maxsize=1)
+def _document_converter():
+    from docling.datamodel.base_models import InputFormat
+    from docling.datamodel.pipeline_options import PdfPipelineOptions
+    from docling.document_converter import DocumentConverter, PdfFormatOption
+
+    pipeline_options = PdfPipelineOptions()
+    pipeline_options.do_ocr = False
+    return DocumentConverter(
+        format_options={
+            InputFormat.PDF: PdfFormatOption(pipeline_options=pipeline_options),
+        }
+    )
+
+
+class _MarkdownSerializerProvider(ChunkingSerializerProvider):
+    def get_serializer(self, doc: Any):
+        from docling_core.transforms.chunker.hierarchical_chunker import ChunkingDocSerializer
+        from docling_core.transforms.serializer.markdown import (
+            MarkdownParams,
+            MarkdownTableSerializer,
+        )
+        from docling_core.types.doc import DocItemLabel
+
+        excluded = {
+            DocItemLabel.DOCUMENT_INDEX,
+            DocItemLabel.PAGE_HEADER,
+            DocItemLabel.PAGE_FOOTER,
+        }
+        return ChunkingDocSerializer(
+            doc=doc,
+            table_serializer=MarkdownTableSerializer(),
+            params=MarkdownParams(
+                labels=set(DocItemLabel) - excluded,
+                compact_tables=True,
+                image_placeholder="",
+                escape_html=False,
+                escape_underscores=False,
+            ),
+        )
+
+
+def _clean_layout_text(value: str) -> str:
+    return normalize_text(_PAGE_FURNITURE.sub("", value)).strip()
+
+
+def _compact_with_offsets(value: str) -> tuple[str, list[int]]:
+    compact: list[str] = []
+    offsets: list[int] = []
+    for index, character in enumerate(unicodedata.normalize("NFKC", value)):
+        if _COMPACT_CHARACTER.fullmatch(character):
+            compact.append(character.casefold())
+            offsets.append(index)
+    return "".join(compact), offsets
+
+
+def _expand_to_line_boundaries(source_text: str, start: int, end: int) -> tuple[int, int]:
+    while start > 0 and source_text[start - 1] not in "\r\n":
+        start -= 1
+    while end < len(source_text) and source_text[end] not in "\r\n":
+        end += 1
+    return start, end
+
+
+def _project_layout_span(
+    source_text: str,
+    content: str,
+    *,
+    compact_source: str,
+    source_offsets: list[int],
+    compact_start: int,
+) -> tuple[int | None, int | None, int]:
+    for candidate in (content, _LIST_MARKER_PREFIX.sub("", content)):
+        compact_content, _ = _compact_with_offsets(candidate)
+        if len(compact_content) < 4:
+            continue
+        position = compact_source.find(compact_content, compact_start)
+        if position < 0:
+            position = compact_source.find(compact_content)
+        if position < 0:
+            continue
+        start, end = _expand_to_line_boundaries(
+            source_text,
+            source_offsets[position],
+            source_offsets[position + len(compact_content) - 1] + 1,
+        )
+        # 重复内容回退匹配可能命中已消费的更早位置，游标只进不退，
+        # 避免后续切片跟着错位。
+        return start, end, max(compact_start, position + len(compact_content))
+    return _project_layout_span_by_anchors(
+        source_text,
+        content,
+        compact_source=compact_source,
+        source_offsets=source_offsets,
+        compact_start=compact_start,
+    )
+
+
+def _project_layout_span_by_anchors(
+    source_text: str,
+    content: str,
+    *,
+    compact_source: str,
+    source_offsets: list[int],
+    compact_start: int,
+) -> tuple[int | None, int | None, int]:
+    """按行锚点顺序匹配，容忍切片里插入的重复表头等非连续内容。"""
+
+    segments = [
+        compact
+        for compact in (
+            _compact_with_offsets(line)[0]
+            for line in _LIST_MARKER_PREFIX.sub("", content).split("\n")
+        )
+        if len(compact) >= 6
+    ]
+    if not segments:
+        return None, None, compact_start
+    total = sum(len(segment) for segment in segments)
+
+    def match_from(cursor: int) -> tuple[list[tuple[int, int]], int]:
+        matched: list[tuple[int, int]] = []
+        position = cursor
+        for segment in segments:
+            found = compact_source.find(segment, position)
+            if found < 0:
+                continue
+            matched.append((found, found + len(segment)))
+            position = found + len(segment)
+        return matched, sum(end - start for start, end in matched)
+
+    matched, covered = match_from(compact_start)
+    if covered * 2 < total:
+        retried, retry_covered = match_from(0)
+        if retry_covered > covered:
+            matched, covered = retried, retry_covered
+    # 覆盖不足一半时宁可不定位，也不能给出错误的行号。
+    if not matched or covered * 2 < total:
+        return None, None, compact_start
+    start, end = _expand_to_line_boundaries(
+        source_text,
+        source_offsets[matched[0][0]],
+        source_offsets[matched[-1][1] - 1] + 1,
+    )
+    return start, end, max(compact_start, matched[-1][1])
+
+
+def chunk_layout_document(
+    raw: bytes,
+    *,
+    filename: str,
+    source_text: str,
+    chunk_size: int,
+) -> list[DocumentChunk]:
+    """使用 Docling HybridChunker 按版面层级、列表与表格边界切分。"""
+
+    from docling.chunking import HybridChunker
+    from docling.datamodel.base_models import DocumentStream
+    from docling.exceptions import BaseError as DoclingError
+    from docling_core.transforms.chunker.tokenizer.openai import OpenAITokenizer
+    from docling_core.types.doc import DocItemLabel
+
+    from app.modules.data_process.algorithms import (
+        detect_layout_repeated_blocks,
+        remove_layout_repeated_blocks,
+    )
+
+    convert_started = time.perf_counter()
+    try:
+        with _CONVERTER_LOCK:
+            conversion = _document_converter().convert(
+                DocumentStream(name=filename, stream=BytesIO(raw))
+            )
+    except DoclingError as exc:
+        raise ValueError(f"文档版面解析失败: {exc}") from exc
+    logger.info(
+        "layout chunking convert done file=%s elapsed=%.2fs",
+        filename,
+        time.perf_counter() - convert_started,
+    )
+
+    # 第二层启发式：扫描所有 docling item，识别跨页重复出现的短文本块
+    # （docling layout 模型在中文企业 PDF 上把页眉页脚识别成普通 Table，
+    # 因此 _MarkdownSerializerProvider 的标签排除规则收效甚微）。
+    page_count = len(getattr(conversion.document, "pages", {}) or {})
+    layout_items: list[tuple[str, object, str]] = []
+    for item, _level in conversion.document.iterate_items():
+        text = getattr(item, "text", None)
+        if not text and hasattr(item, "export_to_markdown"):
+            try:
+                text = item.export_to_markdown(doc=conversion.document) or ""
+            except TypeError:
+                # 旧版 docling_core 无 doc 参数
+                text = item.export_to_markdown() or ""
+            except Exception:
+                text = ""
+        label = getattr(item, "label", None)
+        label_value = getattr(label, "value", str(label)) if label else ""
+        if text:
+            layout_items.append((label_value, item, text))
+    repeated_blocks = detect_layout_repeated_blocks(
+        layout_items, page_count=page_count
+    )
+
+    chunker = HybridChunker(
+        tokenizer=OpenAITokenizer(tokenizer=_tokenizer(), max_tokens=chunk_size),
+        serializer_provider=_MarkdownSerializerProvider(),
+        merge_peers=True,
+        repeat_table_header=True,
+    )
+    compact_source, source_offsets = _compact_with_offsets(source_text)
+    compact_start = 0
+    result: list[DocumentChunk] = []
+    covered_refs: set[str] = set()
+    excluded = {
+        DocItemLabel.DOCUMENT_INDEX,
+        DocItemLabel.PAGE_HEADER,
+        DocItemLabel.PAGE_FOOTER,
+    }
+    for raw_chunk in chunker.chunk(conversion.document):
+        doc_items = tuple(raw_chunk.meta.doc_items or ())
+        if doc_items and all(item.label in excluded for item in doc_items):
+            continue
+        content = _clean_layout_text(raw_chunk.text)
+        if not content:
+            continue
+        contextualized = _clean_layout_text(chunker.contextualize(raw_chunk)) or content
+        if repeated_blocks:
+            content = remove_layout_repeated_blocks(content, repeated_blocks)
+            contextualized = remove_layout_repeated_blocks(
+                contextualized, repeated_blocks
+            )
+        if not content:
+            continue
+        start, end, compact_start = _project_layout_span(
+            source_text,
+            content,
+            compact_source=compact_source,
+            source_offsets=source_offsets,
+            compact_start=compact_start,
+        )
+        original = source_text[start:end] if start is not None and end is not None else content
+        pages: set[int] = set()
+        refs: list[str] = []
+        bboxes: list[dict[str, Any]] = []
+        for item in doc_items:
+            refs.append(str(item.self_ref))
+            covered_refs.add(str(item.self_ref))
+            for provenance in item.prov or ():
+                pages.add(int(provenance.page_no))
+                bbox = provenance.bbox
+                bboxes.append(
+                    {
+                        "page": int(provenance.page_no),
+                        "left": float(bbox.l),
+                        "top": float(bbox.t),
+                        "right": float(bbox.r),
+                        "bottom": float(bbox.b),
+                        "origin": str(bbox.coord_origin.value),
+                    }
+                )
+        result.append(
+            DocumentChunk(
+                original_content=original,
+                contextualized_content=contextualized,
+                source_start=start,
+                source_end=end,
+                source_start_line=(source_text.count("\n", 0, start) + 1 if start is not None else None),
+                source_end_line=(
+                    source_text.count("\n", 0, max(start or 0, (end or 1) - 1)) + 1
+                    if end is not None
+                    else None
+                ),
+                token_count=len(_tokenizer().encode(contextualized)),
+                heading_path=tuple(str(item) for item in (raw_chunk.meta.headings or ())),
+                source_pages=tuple(sorted(pages)),
+                doc_item_refs=tuple(refs),
+                source_bboxes=tuple(bboxes),
+            )
+        )
+
+    # HybridChunker(merge_peers=True) 会丢弃"末尾无正文的孤立标题"。
+    # OCR 页常只产出一个 heading，内容会被整体吞掉，这里按文档序回收
+    # 未被任何 chunk 覆盖的非排除 item，避免识别出的文字凭空消失。
+    # 注意 heading 会进入 meta.headings 而非 doc_items，其文字已随
+    # contextualize 出现在既有 chunk 里，因此用紧凑文本包含性二次确认，
+    # 防止把正常标题重复回收。
+    chunk_haystack = _compact_with_offsets(
+        "\n".join(chunk.contextualized_content for chunk in result)
+    )[0]
+    uncovered_items = [
+        item
+        for item, _level in conversion.document.iterate_items()
+        if item.label not in excluded
+        and str(item.self_ref) not in covered_refs
+        and (getattr(item, "text", None) or "").strip()
+        and _compact_with_offsets(str(item.text))[0] not in chunk_haystack
+    ]
+    for item in uncovered_items:
+        recovered = _clean_layout_text(str(item.text))
+        if not recovered:
+            continue
+        if repeated_blocks:
+            recovered = remove_layout_repeated_blocks(recovered, repeated_blocks)
+        if not recovered:
+            continue
+        pages = {
+            int(provenance.page_no) for provenance in item.prov or ()
+        }
+        bboxes = [
+            {
+                "page": int(provenance.page_no),
+                "left": float(provenance.bbox.l),
+                "top": float(provenance.bbox.t),
+                "right": float(provenance.bbox.r),
+                "bottom": float(provenance.bbox.b),
+                "origin": str(provenance.bbox.coord_origin.value),
+            }
+            for provenance in item.prov or ()
+        ]
+        logger.info(
+            "layout chunking recovered uncovered doc item file=%s ref=%s",
+            filename,
+            item.self_ref,
+        )
+        result.append(
+            DocumentChunk(
+                original_content=recovered,
+                contextualized_content=recovered,
+                source_start=None,
+                source_end=None,
+                source_start_line=None,
+                source_end_line=None,
+                token_count=len(_tokenizer().encode(recovered)),
+                heading_path=(),
+                source_pages=tuple(sorted(pages)),
+                doc_item_refs=(str(item.self_ref),),
+                source_bboxes=tuple(bboxes),
+            )
+        )
+    return result
+
+
+def merge_short_chunks(
+    chunks: list[DocumentChunk],
+    *,
+    source_text: str,
+    min_token_count: int,
+    max_token_count: int,
+) -> list[DocumentChunk]:
+    """在不突破长度上限的前提下，把过短块并入相邻内容。"""
+
+    result: list[DocumentChunk] = []
+    index = 0
+    while index < len(chunks):
+        current = chunks[index]
+        if current.token_count >= min_token_count:
+            result.append(current)
+            index += 1
+            continue
+        if index + 1 < len(chunks):
+            combined = _combine_chunks(current, chunks[index + 1], source_text)
+            if combined.token_count <= max_token_count:
+                result.append(combined)
+                index += 2
+                continue
+        if result:
+            combined = _combine_chunks(result[-1], current, source_text)
+            if combined.token_count <= max_token_count:
+                result[-1] = combined
+                index += 1
+                continue
+        result.append(current)
+        index += 1
+    return result
+
+
+def _combine_chunks(
+    left: DocumentChunk,
+    right: DocumentChunk,
+    source_text: str,
+) -> DocumentChunk:
+    contextualized = "\n\n".join(
+        part for part in (left.contextualized_content, right.contextualized_content) if part
+    )
+    start = left.source_start
+    end = right.source_end
+    has_contiguous_source = (
+        start is not None
+        and left.source_end is not None
+        and right.source_start is not None
+        and end is not None
+        and left.source_end <= right.source_start
+    )
+    original = (
+        source_text[start:end]
+        if has_contiguous_source and start is not None and end is not None
+        else "\n\n".join(
+            part for part in (left.original_content, right.original_content) if part
+        )
+    )
+    if not has_contiguous_source:
+        start = None
+        end = None
+    return DocumentChunk(
+        original_content=original,
+        contextualized_content=contextualized,
+        source_start=start,
+        source_end=end,
+        source_start_line=left.source_start_line if start is not None else None,
+        source_end_line=right.source_end_line if end is not None else None,
+        token_count=len(_tokenizer().encode(contextualized)),
+        heading_path=left.heading_path or right.heading_path,
+        source_pages=tuple(sorted(set(left.source_pages) | set(right.source_pages))),
+        doc_item_refs=left.doc_item_refs + right.doc_item_refs,
+        source_bboxes=left.source_bboxes + right.source_bboxes,
+    )

backend/app/modules/data_process/evaluation.py

@@ -0,0 +1,313 @@
+"""数据处理 - 生成结果的多层质量评测。
+
+三层体系：规则层（确定性规则分）+ 语义层（本地嵌入向量）+ 评审层
+（复用生成模型按 rubric 打分的 LLM-as-judge）。任一层失败自动降级，
+评测永远返回可用结果，不阻断调用方流程。
+"""
+
+from __future__ import annotations
+
+import logging
+from collections.abc import Mapping
+from dataclasses import asdict
+from datetime import UTC, datetime
+from typing import Any
+
+import httpx
+
+from .algorithms import normalize_text, score_quality
+from .algorithms.quality import composite_overall, semantic_quality_scores
+from .generation import (
+    ModelGenerationError,
+    _is_retryable_generation_error,
+    _json_payload,
+    _message_content,
+    chat_completions_url,
+)
+
+logger = logging.getLogger(__name__)
+
+# 送入评审提示词的来源正文上限，避免超长切片挤占评分输出空间。
+_MAX_JUDGE_SOURCE_CHARS = 6000
+
+_JUDGE_DIMENSIONS: dict[str, tuple[str, ...]] = {
+    "standard": (
+        "faithfulness",
+        "correctness",
+        "clarity",
+        "completeness",
+        "alignment",
+    ),
+    "reasoning": (
+        "faithfulness",
+        "correctness",
+        "clarity",
+        "completeness",
+        "alignment",
+        "reasoning_validity",
+    ),
+    "dpo": (
+        "clarity",
+        "chosen_quality",
+        "rejected_quality",
+        "preference_reasonableness",
+        "faithfulness",
+    ),
+}
+
+_DIMENSION_LABELS: dict[str, str] = {
+    "faithfulness": "忠实度",
+    "correctness": "正确性",
+    "clarity": "问题清晰度",
+    "completeness": "回答完整性",
+    "alignment": "指令对齐",
+    "reasoning_validity": "推理有效性",
+    "chosen_quality": "chosen 回答质量",
+    "rejected_quality": "rejected 回答质量",
+    "preference_reasonableness": "偏好区分合理性",
+}
+
+_DIMENSION_RULES: dict[str, str] = {
+    "faithfulness": "忠实度：答案的全部陈述是否被参考资料支持，没有编造、没有引入资料之外的信息；未提供参考资料时按答案内部自洽性评估",
+    "correctness": "正确性：答案中的事实、概念与计算是否正确",
+    "clarity": "问题清晰度：问题是否清晰、自包含、无歧义，脱离上下文也能理解",
+    "completeness": "回答完整性：答案是否充分、直接地回应了问题的全部要点",
+    "alignment": "指令对齐：答案的形式与范围是否符合问题的要求（如格式、语言、范围限定）",
+    "reasoning_validity": "推理有效性：思维链步骤是否逻辑连贯、无跳步或循环论证，结论是否由推理过程自然得出",
+    "chosen_quality": "chosen 回答质量：更优回答的正确性、完整性与表述质量",
+    "rejected_quality": "rejected 回答质量：较差回答是否仍具备基本可读性，使对比训练有意义",
+    "preference_reasonableness": "偏好区分合理性：chosen 是否明显优于 rejected，且优劣差异与问题直接相关",
+}
+
+
+def _judge_system_prompt(output_type: str) -> str:
+    dimensions = _JUDGE_DIMENSIONS[output_type]
+    rules = "\n".join(f"- {_DIMENSION_RULES[name]}" for name in dimensions)
+    scores_schema = ", ".join(f'"{name}": 1-5' for name in dimensions)
+    return (
+        "你是大模型训练数据质量评审员。严格依据用户消息中的【参考资料】评审这条训练数据，逐维度按 1-5 分打分：\n"
+        f"{rules}\n"
+        "评分锚点：5 分=完全符合维度描述；3 分=基本符合但有明显不足；1 分=严重不符合。\n"
+        "忠实度只依据参考资料与公认常识判断，无法得到支持的陈述必须扣分；不要因为答案冗长而加分。\n"
+        "只输出一个 JSON 对象，不要输出 JSON 之外的任何文字。\n"
+        '输出格式：{"scores": {' + scores_schema + '}, "reason": "一句话总评", "issues": ["具体问题，没有则为空数组"]}'
+    )
+
+
+def _judge_user_prompt(record: Mapping[str, Any], source_content: str) -> str:
+    source = normalize_text(source_content)[:_MAX_JUDGE_SOURCE_CHARS] or "（无参考资料）"
+    instruction = normalize_text(str(record.get("instruction") or "")) or "（空）"
+    input_text = normalize_text(str(record.get("input") or ""))
+    sections = [f"【参考资料】\n{source}", f"【问题】\n{instruction}"]
+    if input_text:
+        sections.append(f"【输入】\n{input_text}")
+    if record.get("chosen") or record.get("rejected"):
+        sections.append(f"【更优回答 chosen】\n{normalize_text(str(record.get('chosen') or '')) or '（空）'}")
+        sections.append(f"【较差回答 rejected】\n{normalize_text(str(record.get('rejected') or '')) or '（空）'}")
+    else:
+        output = normalize_text(str(record.get("output") or ""))
+        sections.append(f"【回答】\n{output or '（空）'}")
+    return "\n\n".join(sections)
+
+
+def _validated_judge_payload(payload: Any, output_type: str) -> dict[str, Any]:
+    if not isinstance(payload, Mapping):
+        raise ModelGenerationError("评审响应不是 JSON 对象")
+    raw_scores = payload.get("scores")
+    if not isinstance(raw_scores, Mapping):
+        raise ModelGenerationError("评审响应缺少 scores 对象")
+    expected = _JUDGE_DIMENSIONS[output_type]
+    scores: dict[str, float] = {}
+    for name in expected:
+        value = raw_scores.get(name)
+        if isinstance(value, bool) or not isinstance(value, (int, float)):
+            raise ModelGenerationError(f"评审响应缺少维度 {name} 的有效分数")
+        scores[name] = round(max(1.0, min(5.0, float(value))), 1)
+    issues = payload.get("issues")
+    if not isinstance(issues, list):
+        issues = []
+    issues = [str(item)[:200] for item in issues if str(item).strip()][:8]
+    reason = normalize_text(str(payload.get("reason") or ""))[:300]
+    return {
+        "scores": scores,
+        "overall": round(sum(scores.values()) / len(scores) * 20, 2),
+        "reason": reason,
+        "issues": issues,
+    }
+
+
+def _judge_record(
+    record: Mapping[str, Any],
+    source_content: str,
+    *,
+    model: Mapping[str, Any],
+    config: Mapping[str, Any],
+    client: httpx.Client | None,
+) -> dict[str, Any] | None:
+    output_type = str(config.get("output_type") or "standard").strip().lower()
+    if output_type not in _JUDGE_DIMENSIONS:
+        output_type = "standard"
+    endpoint = chat_completions_url(str(model.get("api_url") or ""))
+    model_name = str(model.get("online_model_name") or model.get("name") or "").strip()
+    if not model_name:
+        raise ModelGenerationError("generation model name is required")
+    temperature = 0.1
+    max_tokens = max(256, min(2048, int(config.get("max_tokens", 1024) or 1024)))
+    timeout = max(1.0, min(120.0, float(config.get("request_timeout_seconds", 60) or 60)))
+    retries = max(0, min(5, int(config.get("generation_retries", 2) or 2)))
+    headers = {"Content-Type": "application/json"}
+    api_key = str(model.get("api_key") or "").strip()
+    if api_key:
+        headers["Authorization"] = f"Bearer {api_key}"
+
+    request_payload: dict[str, Any] = {
+        "model": model_name,
+        "messages": [
+            {"role": "system", "content": _judge_system_prompt(output_type)},
+            {"role": "user", "content": _judge_user_prompt(record, source_content)},
+        ],
+        "temperature": temperature,
+        "max_tokens": max_tokens,
+    }
+    if bool(config.get("json_mode", False)):
+        request_payload["response_format"] = {"type": "json_object"}
+
+    owns_client = client is None
+    http_client = client or httpx.Client(timeout=timeout)
+    try:
+        last_error: Exception | None = None
+        for _ in range(retries + 1):
+            try:
+                response = http_client.post(endpoint, headers=headers, json=request_payload)
+                response.raise_for_status()
+                body = response.json()
+                if not isinstance(body, Mapping):
+                    raise ModelGenerationError("model response body must be a JSON object")
+                judged = _validated_judge_payload(
+                    _json_payload(_message_content(body)),
+                    output_type,
+                )
+                judged["model"] = model_name
+                judged["output_type"] = output_type
+                return judged
+            except Exception as exc:
+                last_error = exc
+                if not _is_retryable_generation_error(exc):
+                    break
+        raise ModelGenerationError(f"质量评审调用失败: {last_error}")
+    finally:
+        if owns_client:
+            http_client.close()
+
+
+def evaluate_result_record(
+    record: Mapping[str, Any],
+    *,
+    source_content: str = "",
+    model: Mapping[str, Any] | None = None,
+    config: Mapping[str, Any] | None = None,
+    client: httpx.Client | None = None,
+    embed_model: Any = None,
+    min_output_length: int = 20,
+) -> dict[str, Any]:
+    """对一条生成结果执行三层评测，返回可直接落库的 quality_score 字典。
+
+    规则层字段保持原样平铺（向后兼容既有读取方）；新增 ``semantic``、
+    ``judge``、``layers``、``evaluated`` 与组合 ``overall``。
+    """
+
+    config_dict = dict(config or {})
+    rule = score_quality(
+        record,
+        min_output_length=min_output_length,
+        source_content=source_content,
+    )
+    quality: dict[str, Any] = asdict(rule)
+
+    semantic = semantic_quality_scores(
+        record,
+        source_content=source_content,
+        embed_model=embed_model,
+    )
+    judge: dict[str, Any] | None = None
+    if model is not None:
+        try:
+            judge = _judge_record(
+                record,
+                source_content,
+                model=model,
+                config=config_dict,
+                client=client,
+            )
+        except Exception as exc:
+            logger.warning(
+                "data process judge evaluation degraded: %s",
+                exc,
+            )
+
+    layers = {
+        "rule": rule.overall,
+        "semantic": semantic.get("overall") if semantic else None,
+        "judge": judge.get("overall") if judge else None,
+    }
+    quality.update(
+        semantic=semantic,
+        judge=judge,
+        layers=layers,
+        evaluated=True,
+        evaluated_at=datetime.now(UTC).isoformat(),
+        overall=composite_overall(
+            rule=layers["rule"],
+            semantic=layers["semantic"],
+            judge=layers["judge"],
+        ),
+    )
+    return quality
+
+
+def reevaluate_edited_record(
+    record: Mapping[str, Any],
+    *,
+    source_content: str = "",
+    previous_quality: Mapping[str, Any] | None = None,
+    embed_model: Any = None,
+    min_output_length: int = 20,
+) -> dict[str, Any]:
+    """手动编辑/恢复后重算规则与语义层，丢弃已过期的评审层。
+
+    编辑会改变内容，旧的评审分不再可信；规则与语义层本地重算零成本。
+    ``evaluated`` 标记沿用原值，保证已评测过的结果编辑后仍有可用分数。
+    """
+
+    rule = score_quality(
+        record,
+        min_output_length=min_output_length,
+        source_content=source_content,
+    )
+    quality: dict[str, Any] = asdict(rule)
+    semantic = semantic_quality_scores(
+        record,
+        source_content=source_content,
+        embed_model=embed_model,
+    )
+    previous = dict(previous_quality or {})
+    evaluated = bool(previous.get("evaluated"))
+    layers = {
+        "rule": rule.overall,
+        "semantic": semantic.get("overall") if semantic else None,
+        "judge": None,
+    }
+    quality.update(
+        semantic=semantic,
+        judge=None,
+        layers=layers,
+        evaluated=evaluated,
+        evaluated_at=(
+            datetime.now(UTC).isoformat() if evaluated else None
+        ),
+        overall=composite_overall(
+            rule=layers["rule"],
+            semantic=layers["semantic"],
+        ),
+    )
+    return quality

backend/app/modules/data_process/generation.py

@@ -0,0 +1,641 @@
+"""数据处理任务的大模型生成适配器。"""
+
+from __future__ import annotations
+
+import hashlib
+import json
+import logging
+import re
+from collections.abc import Callable, Iterable, Mapping
+from typing import Any
+from urllib.parse import urlsplit, urlunsplit
+
+import httpx
+
+from app.modules.data_process.algorithms import normalize_text, stable_split_assignments
+from app.modules.data_process.constants import (
+    MAX_QA_PAIRS_PER_ITEM,
+    MODEL_GENERATION_BATCH_SIZE,
+)
+
+
+class ModelGenerationError(ValueError):
+    """模型配置、响应或调用失败。"""
+
+
+class _TerminalModelGenerationError(ModelGenerationError):
+    """使用相同参数重试也无法恢复的模型响应错误。"""
+
+
+OUTPUT_TYPE_STANDARD = "standard"
+OUTPUT_TYPE_REASONING = "reasoning"
+OUTPUT_TYPE_DPO = "dpo"
+SUPPORTED_OUTPUT_TYPES = {
+    OUTPUT_TYPE_STANDARD,
+    OUTPUT_TYPE_REASONING,
+    OUTPUT_TYPE_DPO,
+}
+REASONING_DETAIL_NORMAL = "normal"
+REASONING_DETAIL_DETAILED = "detailed"
+SUPPORTED_REASONING_DETAILS = {
+    REASONING_DETAIL_NORMAL,
+    REASONING_DETAIL_DETAILED,
+}
+MINIMAX_M3_API_HOSTS = {"api.minimax.io", "api.minimaxi.com"}
+MINIMAX_M3_MIN_COMPLETION_TOKENS = 4096
+logger = logging.getLogger(__name__)
+
+# 问题表述风格规则：防止模型产出“请描述/请说明”式模板化问句。
+_QUESTION_STYLE_RULE = (
+    "各条问题必须覆盖不同的信息点并使用不同的句式，只替换关键词套用同一句式视为重复。"
+    "问题表述要像真实用户自然提出的问题：具体、口语化、直奔信息点，"
+    "避免“请描述”“请说明”“根据文档”等模板化开头，"
+    "也不要把原文句子直接改成问句；多条问题时交替使用直接疑问、场景式提问、追问式等句式。"
+    "表述示例（仅示意风格，不要照搬内容）："
+    "避免——“请描述系统的权限控制机制”；"
+    "推荐——“不同角色能看到的菜单不一样，平台是怎么控制的？”"
+)
+
+# 任务配置未提供提示语时的兜底，与前端内置默认提示语保持同等信息量。
+_DEFAULT_GENERATION_PROMPT = (
+    "你是一名专业的数据生成专家。请基于来源内容生成高质量、"
+    "可直接用于监督微调的问答数据：问题聚焦核心信息点、"
+    "表述像真实用户自然提出的问题，具体、口语化，多条问题使用不同句式；"
+    "答案严格依据来源内容，准确、完整、语言自然，不引入来源之外的信息。"
+)
+
+
+def _is_retryable_generation_error(exc: Exception) -> bool:
+    if isinstance(exc, _TerminalModelGenerationError):
+        return False
+    if isinstance(exc, httpx.HTTPStatusError):
+        status_code = exc.response.status_code
+        return status_code in {408, 425, 429} or status_code >= 500
+    if isinstance(exc, httpx.RequestError):
+        return True
+    return isinstance(exc, (json.JSONDecodeError, ModelGenerationError))
+
+
+def _is_official_minimax_m3(endpoint: str, model_name: str) -> bool:
+    host = (urlsplit(endpoint).hostname or "").casefold()
+    return host in MINIMAX_M3_API_HOSTS and model_name.casefold() == "minimax-m3"
+
+
+def chat_completions_url(value: str) -> str:
+    """把域名、基础 URL 或完整地址统一为 chat completions 地址。"""
+
+    raw = (value or "").strip()
+    if not raw:
+        raise ModelGenerationError("generation model api_url is required")
+    if "://" not in raw:
+        raw = f"https://{raw}"
+    parsed = urlsplit(raw)
+    if parsed.scheme not in {"http", "https"} or not parsed.hostname:
+        raise ModelGenerationError("generation model api_url must be an HTTP(S) host or URL")
+    if parsed.username or parsed.password:
+        raise ModelGenerationError("generation model api_url must not contain credentials")
+
+    path = parsed.path.rstrip("/")
+    if path.endswith("/chat/completions"):
+        target_path = path
+    elif path.endswith("/v1"):
+        target_path = f"{path}/chat/completions"
+    elif not path:
+        target_path = "/v1/chat/completions"
+    else:
+        target_path = f"{path}/v1/chat/completions"
+    return urlunsplit((parsed.scheme, parsed.netloc, target_path, "", ""))
+
+
+def _response_choice(payload: Mapping[str, Any]) -> Mapping[str, Any]:
+    try:
+        choice = payload["choices"][0]
+    except (KeyError, IndexError, TypeError) as exc:
+        raise ModelGenerationError("模型响应缺少 choices[0]") from exc
+    if not isinstance(choice, Mapping):
+        raise ModelGenerationError("模型响应 choices[0] 不是对象")
+    return choice
+
+
+def _response_finish_reason(payload: Mapping[str, Any]) -> str:
+    try:
+        return str(_response_choice(payload).get("finish_reason") or "").strip().lower()
+    except ModelGenerationError:
+        return ""
+
+
+def _response_content_length(payload: Mapping[str, Any]) -> int:
+    try:
+        message = _response_choice(payload).get("message")
+        if not isinstance(message, Mapping):
+            return 0
+        content = message.get("content")
+        if isinstance(content, str):
+            return len(content)
+        if isinstance(content, list):
+            return sum(
+                len(str(item.get("text") or ""))
+                for item in content
+                if isinstance(item, Mapping)
+            )
+    except ModelGenerationError:
+        pass
+    return 0
+
+
+def _raise_for_terminal_response(payload: Mapping[str, Any]) -> Mapping[str, Any]:
+    choice = _response_choice(payload)
+    base_response = payload.get("base_resp")
+    status_code: Any = None
+    status_message = ""
+    if isinstance(base_response, Mapping):
+        status_code = base_response.get("status_code")
+        status_message = re.sub(
+            r"\s+", " ", str(base_response.get("status_msg") or "")
+        ).strip()[:200]
+
+    if bool(payload.get("input_sensitive")) or status_code in {1026, "1026"}:
+        raise _TerminalModelGenerationError(
+            f"模型输入触发内容安全拦截（code={status_code or 1026}）"
+        )
+    if bool(payload.get("output_sensitive")) or status_code in {1027, "1027"}:
+        raise _TerminalModelGenerationError(
+            f"模型输出触发内容安全拦截（code={status_code or 1027}）"
+        )
+
+    finish_reason = str(choice.get("finish_reason") or "").strip().lower()
+    if finish_reason == "length":
+        raise _TerminalModelGenerationError(
+            "模型输出因达到 Token 上限被截断（finish_reason=length），"
+            "请提高最大输出长度后重试"
+        )
+    if finish_reason == "content_filter":
+        raise _TerminalModelGenerationError(
+            "模型输出被内容安全策略拦截（finish_reason=content_filter）"
+        )
+    if finish_reason in {"tool_calls", "function_call"}:
+        raise _TerminalModelGenerationError(
+            f"模型返回了当前生成任务不支持的工具调用（finish_reason={finish_reason}）"
+        )
+    if status_code not in {None, "", 0, "0"}:
+        detail = f"：{status_message}" if status_message else ""
+        raise _TerminalModelGenerationError(
+            f"模型服务返回业务错误（code={status_code}）{detail}"
+        )
+    return choice
+
+
+def _message_content(payload: Mapping[str, Any]) -> str:
+    choice = _raise_for_terminal_response(payload)
+    message = choice.get("message")
+    if not isinstance(message, Mapping):
+        raise ModelGenerationError("模型响应缺少 choices[0].message")
+    content = message.get("content")
+    if isinstance(content, str):
+        result = content
+    elif isinstance(content, list):
+        parts = [
+            str(item.get("text") or "")
+            for item in content
+            if isinstance(item, Mapping) and item.get("type") in {None, "text", "output_text"}
+        ]
+        result = "".join(parts)
+    elif content is None:
+        result = ""
+    else:
+        raise ModelGenerationError("模型响应 content 必须是文本")
+    if not result.strip():
+        raise ModelGenerationError("模型返回的最终内容为空，未生成可解析的 JSON")
+    return result
+
+
+def _json_documents(content: str) -> list[Any]:
+    decoder = json.JSONDecoder()
+    documents: list[Any] = []
+    cursor = 0
+    while cursor < len(content):
+        match = re.search(r"[\[{]", content[cursor:])
+        if not match:
+            break
+        start = cursor + match.start()
+        try:
+            value, end = decoder.raw_decode(content[start:])
+        except json.JSONDecodeError:
+            cursor = start + 1
+            continue
+        if isinstance(value, (Mapping, list)):
+            documents.append(value)
+        cursor = start + max(end, 1)
+    return documents
+
+
+def _json_payload(content: str) -> Any:
+    # 只移除模型在 JSON 之前自行输出的思考过程，不能破坏 JSON 字段中的训练内容。
+    cleaned = content.strip()
+    if re.match(r"^\s*<think>", cleaned, flags=re.IGNORECASE) and not re.match(
+        r"^\s*<think>[\s\S]*?</think>", cleaned, flags=re.IGNORECASE
+    ):
+        raise ModelGenerationError("模型思考内容未闭合，响应可能已被截断")
+    cleaned = re.sub(
+        r"^\s*(?:<think>[\s\S]*?</think>\s*)+",
+        "",
+        cleaned,
+        count=1,
+        flags=re.IGNORECASE,
+    ).strip()
+    fenced = re.fullmatch(r"```(?:json)?\s*([\s\S]*?)\s*```", cleaned, flags=re.IGNORECASE)
+    if fenced:
+        cleaned = fenced.group(1).strip()
+    try:
+        return json.loads(cleaned)
+    except json.JSONDecodeError as direct_error:
+        documents = _json_documents(cleaned)
+        if len(documents) == 1:
+            return documents[0]
+        if len(documents) > 1:
+            raise ModelGenerationError("模型响应包含多个 JSON 对象，无法确定应使用哪一个")
+        raise ModelGenerationError(
+            "模型响应中没有找到唯一且完整的 JSON 对象"
+            f"（第 {direct_error.lineno} 行，第 {direct_error.colno} 列）"
+        ) from direct_error
+
+
+def _result_items(payload: Any) -> list[Mapping[str, Any]]:
+    if isinstance(payload, list):
+        values = payload
+    elif isinstance(payload, Mapping):
+        nested = next(
+            (
+                payload[key]
+                for key in ("items", "results", "data", "records")
+                if isinstance(payload.get(key), list)
+            ),
+            None,
+        )
+        values = nested if isinstance(nested, list) else [payload]
+    else:
+        raise ModelGenerationError("model JSON must be an object or array")
+    items = [item for item in values if isinstance(item, Mapping)]
+    if not items:
+        raise ModelGenerationError("model JSON does not contain result objects")
+    return items
+
+
+def _prompt_messages(
+    prompt: str,
+    content: str,
+    count: int,
+    *,
+    start_index: int,
+    total_count: int,
+    output_type: str,
+    reasoning_detail: str,
+) -> list[dict[str, str]]:
+    end_index = start_index + count - 1
+    if output_type == OUTPUT_TYPE_REASONING:
+        schema = '{"items":[{"instruction":"...","input":"...","reasoning":"...","answer":"..."}]}'
+        detail_rule = (
+            "推理详细程度为“详细”：完整展开问题条件、来源依据、中间计算或推导，"
+            "并在得出答案前核对结论；每一步都必须能从来源内容中验证。"
+            if reasoning_detail == REASONING_DETAIL_DETAILED
+            else
+            "推理详细程度为“普通”：只保留得出答案所需的关键依据和必要步骤，"
+            "避免冗长复述、套话和无依据扩展。"
+        )
+        output_rule = (
+            "你正在生成用于训练推理模型的思维链数据，而不是普通问答数据。"
+            "instruction、reasoning 和 answer 均不得为空；reasoning 必须是基于来源内容、"
+            f"可核对的推理过程，answer 只写最终答案。{detail_rule}"
+            "这是思维链输出模式，即使其他提示语要求省略分析，也不得省略 reasoning。"
+            "不要自行添加 <think> 标签，系统会在保存时统一组装。"
+        )
+    elif output_type == OUTPUT_TYPE_DPO:
+        schema = (
+            '{"items":[{"instruction":"...","input":"...",'
+            '"chosen":"...","rejected":"..."}]}'
+        )
+        output_rule = (
+            "你正在生成用于直接偏好优化（DPO）的成对偏好数据。"
+            "instruction、chosen 和 rejected 均不得为空；chosen 必须是忠于来源、"
+            "准确完整的优选回答，rejected 必须是表面合理但存在明确质量缺陷的拒选回答。"
+            "两者不得相同；rejected 不得包含违法危险内容，也不得用空白、乱码或无关文本凑数。"
+            "不要输出分析过程或 <think> 标签。"
+        )
+    else:
+        schema = '{"items":[{"instruction":"...","input":"...","output":"..."}]}'
+        output_rule = (
+            "你正在生成标准监督微调问答数据。instruction 和 output 不得为空；"
+            "output 只写最终答案，禁止输出分析、推理过程或 <think> 标签。"
+        )
+    schema_instruction = (
+        f"必须只返回 JSON 对象，格式为 {schema}；items 必须包含 {count} 条。"
+        f"这是总计 {total_count} 条中的第 {start_index}-{end_index} 条。"
+        f"{_QUESTION_STYLE_RULE}{output_rule}"
+        "不要输出 Markdown 代码围栏或 JSON 之外的说明。"
+    )
+    base_prompt = normalize_text(prompt) or _DEFAULT_GENERATION_PROMPT
+    if "{{ content }}" in base_prompt:
+        user_prompt = base_prompt.replace("{{ content }}", content)
+        return [
+            {"role": "system", "content": schema_instruction},
+            {"role": "user", "content": user_prompt},
+        ]
+    return [
+        {"role": "system", "content": f"{base_prompt}\n{schema_instruction}"},
+        {"role": "user", "content": f"来源内容：\n{content}"},
+    ]
+
+
+def generate_model_records(
+    preview_items: Iterable[Mapping[str, Any]],
+    *,
+    model: Mapping[str, Any],
+    config: Mapping[str, Any],
+    task_id: str,
+    split: Mapping[str, int],
+    qa_pairs_per_item: int,
+    client: httpx.Client | None = None,
+    on_progress: Callable[[int, int], None] | None = None,
+) -> list[dict[str, Any]]:
+    """调用 OpenAI 兼容接口，将预览切片生成标准训练记录。
+
+    每个切片按安全批次调用模型；失败批次会产生一条可人工修复的
+    invalid 结果，已经成功的批次不会丢失。
+    """
+
+    if not 1 <= qa_pairs_per_item <= MAX_QA_PAIRS_PER_ITEM:
+        raise ModelGenerationError(f"qa_pairs_per_item must be in [1, {MAX_QA_PAIRS_PER_ITEM}]")
+    output_type = str(config.get("output_type") or OUTPUT_TYPE_STANDARD).strip().lower()
+    if output_type not in SUPPORTED_OUTPUT_TYPES:
+        raise ModelGenerationError(f"output_type must be one of {sorted(SUPPORTED_OUTPUT_TYPES)}")
+    reasoning_detail = str(
+        config.get("reasoning_detail") or REASONING_DETAIL_NORMAL
+    ).strip().lower()
+    if reasoning_detail not in SUPPORTED_REASONING_DETAILS:
+        raise ModelGenerationError(
+            f"reasoning_detail must be one of {sorted(SUPPORTED_REASONING_DETAILS)}"
+        )
+    endpoint = chat_completions_url(str(model.get("api_url") or ""))
+    model_name = str(model.get("online_model_name") or model.get("name") or "").strip()
+    if not model_name:
+        raise ModelGenerationError("generation model name is required")
+    is_minimax_m3 = _is_official_minimax_m3(endpoint, model_name)
+
+    temperature = float(config.get("temperature", 0.7))
+    max_tokens = int(config.get("max_tokens", 1024))
+    timeout = max(1.0, min(120.0, float(config.get("request_timeout_seconds", 60))))
+    retries = max(0, min(5, int(config.get("generation_retries", 2))))
+    headers = {"Content-Type": "application/json"}
+    api_key = str(model.get("api_key") or "").strip()
+    if api_key:
+        headers["Authorization"] = f"Bearer {api_key}"
+
+    owns_client = client is None
+    http_client = client or httpx.Client(timeout=timeout)
+    results: list[dict[str, Any]] = []
+    try:
+        preview_list = list(preview_items)
+        total_items = len(preview_list)
+        for item_index, item in enumerate(preview_list):
+            preview_id = str(item.get("id") or f"preview-{item_index + 1}")
+            content = normalize_text(
+                str(item.get("edited_content") or item.get("original_content") or "")
+            )
+            for batch_offset in range(0, qa_pairs_per_item, MODEL_GENERATION_BATCH_SIZE):
+                batch_count = min(
+                    MODEL_GENERATION_BATCH_SIZE,
+                    qa_pairs_per_item - batch_offset,
+                )
+                batch_start = batch_offset + 1
+                batch_end = batch_offset + batch_count
+                request_payload: dict[str, Any] = {
+                    "model": model_name,
+                    "messages": _prompt_messages(
+                        str(config.get("generation_prompt") or ""),
+                        content,
+                        batch_count,
+                        start_index=batch_start,
+                        total_count=qa_pairs_per_item,
+                        output_type=output_type,
+                        reasoning_detail=reasoning_detail,
+                    ),
+                    "temperature": temperature,
+                }
+                if is_minimax_m3:
+                    request_payload.update(
+                        reasoning_split=True,
+                        max_completion_tokens=max(
+                            max_tokens,
+                            MINIMAX_M3_MIN_COMPLETION_TOKENS,
+                        ),
+                    )
+                else:
+                    request_payload["max_tokens"] = max_tokens
+                if bool(config.get("json_mode", False)) and not is_minimax_m3:
+                    request_payload["response_format"] = {"type": "json_object"}
+
+                last_error: Exception | None = None
+                generated_items: list[Mapping[str, Any]] | None = None
+                for _ in range(retries + 1):
+                    try:
+                        response = http_client.post(
+                            endpoint,
+                            headers=headers,
+                            json=request_payload,
+                        )
+                        response.raise_for_status()
+                        body = response.json()
+                        if not isinstance(body, Mapping):
+                            raise ModelGenerationError("model response body must be a JSON object")
+                        try:
+                            candidate_items = _result_items(
+                                _json_payload(_message_content(body))
+                            )
+                        except ModelGenerationError as exc:
+                            logger.warning(
+                                "data process model response rejected task_id=%s model=%s "
+                                "finish_reason=%s response_chars=%s input_sensitive=%s "
+                                "output_sensitive=%s reason=%s",
+                                task_id,
+                                model_name,
+                                _response_finish_reason(body) or "missing",
+                                _response_content_length(body),
+                                bool(body.get("input_sensitive")),
+                                bool(body.get("output_sensitive")),
+                                str(exc),
+                            )
+                            raise
+                        if len(candidate_items) < batch_count:
+                            raise ModelGenerationError(
+                                "model response contains fewer result objects than requested: "
+                                f"expected {batch_count}, got {len(candidate_items)}"
+                            )
+                        generated_items = candidate_items
+                        break
+                    except (
+                        httpx.HTTPError,
+                        json.JSONDecodeError,
+                        ModelGenerationError,
+                    ) as exc:
+                        last_error = exc
+                        if not _is_retryable_generation_error(exc):
+                            break
+
+                if generated_items is None:
+                    error_message = str(last_error or "model generation failed")[:2000]
+                    failure_instruction = (
+                        f"模型生成失败，请人工补充（第 {batch_start}-{batch_end} 条）"
+                    )
+                    result_id = (
+                        "result_"
+                        f"{hashlib.sha256(f'{preview_id}:error:{batch_start}'.encode()).hexdigest()[:16]}"
+                    )
+                    results.append(
+                        {
+                            "id": result_id,
+                            "preview_item_id": preview_id,
+                            "instruction": failure_instruction,
+                            "input": content,
+                            "output": "",
+                            "chosen": "",
+                            "rejected": "",
+                            "original_instruction": failure_instruction,
+                            "original_input": content,
+                            "original_output": "",
+                            "original_chosen": "",
+                            "original_rejected": "",
+                            "status": "invalid",
+                            "error": error_message,
+                            "split": "train",
+                        }
+                    )
+                    continue
+
+                for batch_index, value in enumerate(generated_items[:batch_count]):
+                    variant_index = batch_offset + batch_index
+                    instruction = normalize_text(
+                        str(value.get("instruction") or value.get("question") or "")
+                    )
+                    input_text = normalize_text(
+                        str(value.get("input") or value.get("context") or "")
+                    )
+                    chosen = ""
+                    rejected = ""
+                    if output_type == OUTPUT_TYPE_REASONING:
+                        reasoning = normalize_text(
+                            re.sub(
+                                r"</?think>",
+                                "",
+                                str(value.get("reasoning") or value.get("analysis") or ""),
+                                flags=re.IGNORECASE,
+                            )
+                        )
+                        answer = normalize_text(
+                            re.sub(
+                                r"</?think>",
+                                "",
+                                str(
+                                    value.get("answer")
+                                    or value.get("final_answer")
+                                    or value.get("output")
+                                    or ""
+                                ),
+                                flags=re.IGNORECASE,
+                            )
+                        )
+                        output = (
+                            f"<think>\n{reasoning}\n</think>\n{answer}"
+                            if reasoning and answer
+                            else answer or (f"<think>\n{reasoning}\n</think>" if reasoning else "")
+                        )
+                        valid = bool(instruction and reasoning and answer)
+                        missing_error = "model result is missing instruction, reasoning or answer"
+                    elif output_type == OUTPUT_TYPE_DPO:
+                        chosen = normalize_text(str(value.get("chosen") or ""))
+                        rejected = normalize_text(str(value.get("rejected") or ""))
+                        chosen = normalize_text(
+                            re.sub(
+                                r"<think>[\s\S]*?(?:</think>|$)",
+                                "",
+                                chosen,
+                                flags=re.IGNORECASE,
+                            )
+                        )
+                        rejected = normalize_text(
+                            re.sub(
+                                r"<think>[\s\S]*?(?:</think>|$)",
+                                "",
+                                rejected,
+                                flags=re.IGNORECASE,
+                            )
+                        )
+                        output = chosen
+                        valid = bool(
+                            instruction
+                            and chosen
+                            and rejected
+                            and chosen.strip() != rejected.strip()
+                        )
+                        missing_error = (
+                            "model result is missing instruction, chosen or rejected, "
+                            "or chosen equals rejected"
+                        )
+                    else:
+                        output = normalize_text(
+                            str(
+                                value.get("output")
+                                or value.get("answer")
+                                or value.get("response")
+                                or ""
+                            )
+                        )
+                        output = normalize_text(
+                            re.sub(
+                                r"<think>[\s\S]*?(?:</think>|$)",
+                                "",
+                                output,
+                                flags=re.IGNORECASE,
+                            )
+                        )
+                        valid = bool(instruction and output)
+                        missing_error = "model result is missing instruction or output"
+                    raw_id = (
+                        f"{preview_id}:{variant_index + 1}:{instruction}:"
+                        f"{output}:{rejected}"
+                    )
+                    result_id = f"result_{hashlib.sha256(raw_id.encode()).hexdigest()[:16]}"
+                    results.append(
+                        {
+                            "id": result_id,
+                            "preview_item_id": preview_id,
+                            "instruction": instruction,
+                            "input": input_text,
+                            "output": output,
+                            "chosen": chosen,
+                            "rejected": rejected,
+                            "original_instruction": instruction,
+                            "original_input": input_text,
+                            "original_output": output,
+                            "original_chosen": chosen,
+                            "original_rejected": rejected,
+                            "status": "valid" if valid else "invalid",
+                            "error": (None if valid else missing_error),
+                            "split": "train",
+                        }
+                    )
+            if on_progress:
+                on_progress(item_index + 1, total_items)
+    finally:
+        if owns_client:
+            http_client.close()
+    assignments = stable_split_assignments(
+        [str(result["id"]) for result in results],
+        split,
+        seed=task_id,
+    )
+    for result, assignment in zip(results, assignments, strict=True):
+        result["split"] = assignment
+    return results
+
+
+__all__ = ["ModelGenerationError", "chat_completions_url", "generate_model_records"]

backend/app/modules/data_process/office_preview.py

@@ -0,0 +1,319 @@
+"""Word 与 Excel 原文件的安全、受限预览模型。
+
+预览只返回浏览器绘制所需的结构化数据，不返回或执行 Office 包中的活动内容。
+DOCX 的字符偏移与上传时的正文抽取规则保持一致，供前端定位当前切片。
+"""
+
+from __future__ import annotations
+
+import io
+import re
+from typing import Any
+
+from docx import Document
+from docx.oxml.ns import qn
+from docx.oxml.table import CT_Tbl
+from docx.oxml.text.paragraph import CT_P
+from docx.table import Table
+from docx.text.paragraph import Paragraph
+from openpyxl import load_workbook
+
+from app.modules.data_process.algorithms import (
+    _MAX_WORKBOOK_COLUMNS,
+    _MAX_WORKBOOK_HEADER_SCAN_ROWS,
+    _infer_xlsx_header_region,
+    _normalize_spreadsheet_value,
+    _rewrite_xlsx_workbook_relationships,
+    _validate_office_archive,
+    _xlsx_sheet_merge_ranges,
+    normalize_text,
+)
+from app.modules.data_process.algorithms.parsers.office import iter_document_blocks
+
+MAX_DOCX_PREVIEW_BLOCKS = 2_000
+MAX_XLSX_PREVIEW_ROWS = 200
+
+
+def _docx_alignment(paragraph: Paragraph) -> str:
+    value = paragraph.alignment
+    return {
+        0: "left",
+        1: "center",
+        2: "right",
+        3: "justify",
+        4: "distribute",
+        5: "justify",
+        7: "justify",
+        8: "distribute",
+        9: "distribute",
+    }.get(int(value) if value is not None else -1, "left")
+
+
+def _docx_heading_level(paragraph: Paragraph) -> int | None:
+    style = paragraph.style
+    style_name = str(style.name or "") if style is not None else ""
+    style_id = str(style.style_id or "") if style is not None else ""
+    match = re.search(r"(?:heading|标题)\s*([1-6])", f"{style_name} {style_id}", re.IGNORECASE)
+    if match:
+        return int(match.group(1))
+    # Word 的目录和导航窗格依据大纲级别识别标题；未套标题样式但带
+    # outlineLvl 的段落（如手工排版的编号小节）同样是标题。
+    outline = paragraph._p.find(f"{qn('w:pPr')}/{qn('w:outlineLvl')}")
+    if outline is not None:
+        value = outline.get(qn("w:val"))
+        if value is not None and value.isdigit():
+            level = int(value)
+            if 0 <= level <= 5:
+                return level + 1
+    return None
+
+
+def build_docx_preview(raw: bytes) -> dict[str, Any]:
+    """把 DOCX 转为保留标题、段落和表格顺序的浏览器预览模型。"""
+
+    _validate_office_archive(raw, "docx")
+    try:
+        document = Document(io.BytesIO(raw))
+    except Exception as exc:
+        raise ValueError(f"invalid DOCX file: {exc}") from exc
+
+    blocks: list[dict[str, Any]] = []
+    source_cursor = 0
+    has_source_content = False
+    rendered_blocks = 0
+    truncated = False
+
+    def source_range(value: str) -> tuple[str, int, int] | None:
+        nonlocal source_cursor, has_source_content
+        text = normalize_text(value)
+        if not text:
+            return None
+        if has_source_content:
+            source_cursor += 2
+        start = source_cursor
+        source_cursor += len(text)
+        has_source_content = True
+        return text, start, source_cursor
+
+    for child in iter_document_blocks(document.element.body):
+        if rendered_blocks >= MAX_DOCX_PREVIEW_BLOCKS:
+            truncated = True
+            break
+
+        if isinstance(child, CT_P):
+            paragraph = Paragraph(child, document)
+            located = source_range(paragraph.text)
+            if located is None:
+                continue
+            text, start, end = located
+            style_name = str(paragraph.style.name or "") if paragraph.style else ""
+            blocks.append(
+                {
+                    "type": "paragraph",
+                    "text": text,
+                    "style": style_name,
+                    "heading_level": _docx_heading_level(paragraph),
+                    "alignment": _docx_alignment(paragraph),
+                    "is_list": "list" in style_name.casefold() or "列表" in style_name,
+                    "source_start": start,
+                    "source_end": end,
+                }
+            )
+            rendered_blocks += 1
+            continue
+
+        if not isinstance(child, CT_Tbl):
+            continue
+        table = Table(child, document)
+        preview_rows: list[dict[str, Any]] = []
+        for row in table.rows:
+            if rendered_blocks >= MAX_DOCX_PREVIEW_BLOCKS:
+                truncated = True
+                break
+            cell_values = [normalize_text(cell.text) for cell in row.cells]
+            located = source_range("\t".join(cell_values))
+            if located is None:
+                continue
+            _, start, end = located
+            preview_rows.append(
+                {
+                    "cells": cell_values,
+                    "source_start": start,
+                    "source_end": end,
+                }
+            )
+            rendered_blocks += 1
+        if preview_rows:
+            blocks.append({"type": "table", "rows": preview_rows})
+        if truncated:
+            break
+
+    return {
+        "format": "docx",
+        "blocks": blocks,
+        "truncated": truncated,
+    }
+
+
+def build_xlsx_preview(
+    raw: bytes,
+    *,
+    sheet_index: int = 0,
+    offset: int = 0,
+    limit: int = 100,
+) -> dict[str, Any]:
+    """按工作表分页返回 XLSX 的表头和记录网格。"""
+
+    if sheet_index < 0 or offset < 0:
+        raise ValueError("sheet_index and offset must be non-negative")
+    if limit < 1 or limit > MAX_XLSX_PREVIEW_ROWS:
+        raise ValueError(
+            f"XLSX preview limit must be in [1, {MAX_XLSX_PREVIEW_ROWS}]"
+        )
+
+    _validate_office_archive(raw, "xlsx")
+    merged_by_sheet, normalized_targets = _xlsx_sheet_merge_ranges(raw)
+    workbook_raw = (
+        _rewrite_xlsx_workbook_relationships(raw, normalized_targets)
+        if normalized_targets
+        else raw
+    )
+    try:
+        workbook = load_workbook(
+            io.BytesIO(workbook_raw),
+            read_only=True,
+            data_only=True,
+            keep_links=False,
+        )
+    except Exception as exc:
+        raise ValueError(f"invalid XLSX file: {exc}") from exc
+
+    try:
+        sheets = [
+            {
+                "index": index,
+                "name": worksheet.title,
+                "state": worksheet.sheet_state,
+            }
+            for index, worksheet in enumerate(workbook.worksheets)
+        ]
+        if not sheets:
+            raise ValueError("XLSX workbook contains no worksheets")
+        if sheet_index >= len(sheets):
+            raise ValueError("XLSX worksheet index is out of range")
+
+        worksheet = workbook.worksheets[sheet_index]
+        reset_dimensions = getattr(worksheet, "reset_dimensions", None)
+        if callable(reset_dimensions):
+            reset_dimensions()
+        row_iterator = enumerate(worksheet.iter_rows(values_only=True), start=1)
+        buffered_rows: dict[int, tuple[Any, ...]] = {}
+
+        def normalized_values(row: tuple[Any, ...]) -> list[Any]:
+            values = list(row)
+            while values and values[-1] in {None, ""}:
+                values.pop()
+            if len(values) > _MAX_WORKBOOK_COLUMNS:
+                raise ValueError(
+                    f"XLSX worksheet {worksheet.title!r} exceeds "
+                    f"{_MAX_WORKBOOK_COLUMNS} columns"
+                )
+            return values
+
+        for row_number, row in row_iterator:
+            values = normalized_values(row)
+            if not values or all(value in {None, ""} for value in values):
+                continue
+            buffered_rows[row_number] = tuple(values)
+            if len(buffered_rows) >= _MAX_WORKBOOK_HEADER_SCAN_ROWS:
+                break
+
+        if not buffered_rows:
+            return {
+                "format": "xlsx",
+                "sheets": sheets,
+                "active_sheet": {
+                    "index": sheet_index,
+                    "name": worksheet.title,
+                    "columns": [],
+                    "rows": [],
+                    "offset": offset,
+                    "limit": limit,
+                    "has_more": False,
+                },
+            }
+
+        _, header_end_row, headers = _infer_xlsx_header_region(
+            worksheet.title,
+            buffered_rows,
+            merged_by_sheet.get(worksheet.title, ()),
+        )
+        preview_rows: list[dict[str, Any]] = []
+        record_index = 0
+        has_more = False
+
+        def append_row(row_number: int, values: tuple[Any, ...] | list[Any]) -> bool:
+            nonlocal record_index, has_more
+            row_values = list(values)
+            if len(row_values) > len(headers):
+                raise ValueError(
+                    f"XLSX worksheet {worksheet.title!r} has a row wider than its header"
+                )
+            row_values.extend([None] * (len(headers) - len(row_values)))
+            record = {
+                header: _normalize_spreadsheet_value(value)
+                for header, value in zip(headers, row_values, strict=True)
+            }
+            if not any(value not in {"", None} for value in record.values()):
+                return False
+            current_index = record_index
+            record_index += 1
+            if current_index < offset:
+                return False
+            if len(preview_rows) >= limit:
+                has_more = True
+                return True
+            preview_rows.append(
+                {
+                    "row_number": row_number,
+                    "record_index": current_index,
+                    "values": [record[header] for header in headers],
+                    "record": record,
+                }
+            )
+            return False
+
+        for row_number, values in buffered_rows.items():
+            if row_number > header_end_row and append_row(row_number, values):
+                break
+        else:
+            for row_number, row in row_iterator:
+                values = normalized_values(row)
+                if not values or all(value in {None, ""} for value in values):
+                    continue
+                if append_row(row_number, values):
+                    break
+
+        return {
+            "format": "xlsx",
+            "sheets": sheets,
+            "active_sheet": {
+                "index": sheet_index,
+                "name": worksheet.title,
+                "columns": headers,
+                "rows": preview_rows,
+                "offset": offset,
+                "limit": limit,
+                "has_more": has_more,
+            },
+        }
+    finally:
+        workbook.close()
+
+
+__all__ = [
+    "MAX_DOCX_PREVIEW_BLOCKS",
+    "MAX_XLSX_PREVIEW_ROWS",
+    "build_docx_preview",
+    "build_xlsx_preview",
+]

backend/app/modules/data_process/schema_cli.py

@@ -0,0 +1,76 @@
+"""数据处理运行表的显式检查与安装命令。"""
+
+from __future__ import annotations
+
+import argparse
+from urllib.parse import urlsplit
+
+from app.modules.data_process.store import DataProcessStore
+
+REQUIRED_TASK_COLUMNS = (
+    "generation_run_id",
+    "results_confirmed",
+    "workflow_step",
+    "preview_status",
+    "preview_progress",
+    "preview_run_id",
+    "preview_failure_reason",
+    "preview_total_files",
+    "preview_completed_files",
+)
+
+
+def _target_label(database_url: str) -> str:
+    parsed = urlsplit(database_url)
+    database = parsed.path.strip("/") or "(unknown)"
+    return f"{parsed.hostname or '(unknown)'}:{parsed.port or 5432}/{database}"
+
+
+def _schema_ready(store: DataProcessStore) -> bool:
+    with store.connect() as conn:
+        row = conn.execute(
+            """
+            SELECT COUNT(*) = %s AS ready
+            FROM information_schema.columns
+            WHERE table_schema=current_schema()
+              AND table_name='data_process_tasks'
+              AND column_name = ANY(%s)
+            """,
+            (len(REQUIRED_TASK_COLUMNS), list(REQUIRED_TASK_COLUMNS)),
+        ).fetchone()
+    return bool(row and row["ready"])
+
+
+def main() -> int:
+    parser = argparse.ArgumentParser(
+        description="检查或显式安装数据处理运行表（不会由应用启动自动执行）"
+    )
+    action = parser.add_mutually_exclusive_group(required=True)
+    action.add_argument("--check", action="store_true", help="只读检查迁移是否已安装")
+    action.add_argument("--apply", action="store_true", help="执行 002 数据处理迁移")
+    parser.add_argument(
+        "--yes",
+        action="store_true",
+        help="确认允许修改 DATABASE_URL 指向的数据库；与 --apply 同时使用",
+    )
+    args = parser.parse_args()
+
+    store = DataProcessStore()
+    target = _target_label(store.database_url)
+    if args.check:
+        ready = _schema_ready(store)
+        print(f"数据处理 schema：{'已安装' if ready else '未安装'}；目标：{target}")
+        return 0 if ready else 1
+    if not args.yes:
+        parser.error("--apply 必须同时提供 --yes，确认修改目标数据库")
+
+    print(f"正在安装数据处理 schema；目标：{target}")
+    store.ensure_schema()
+    if not _schema_ready(store):
+        raise RuntimeError("迁移执行后仍未检测到 generation_run_id")
+    print("数据处理 schema 安装完成")
+    return 0
+
+
+if __name__ == "__main__":
+    raise SystemExit(main())

backend/app/modules/data_process/storage.py

@@ -0,0 +1,669 @@
+"""数据处理源文件的受控暂存与分层对象存储。"""
+
+from __future__ import annotations
+
+import os
+import re
+import stat
+import unicodedata
+import uuid
+from dataclasses import dataclass
+from functools import lru_cache
+from pathlib import Path, PurePosixPath
+from typing import Iterable, Iterator
+from urllib.parse import quote, unquote, urlsplit
+
+from app.core.config import get_settings
+from app.modules.storage.minio_store import get_object_storage
+
+
+class DataProcessStorageError(ValueError):
+    """本地对象引用或文件系统状态不安全。"""
+
+
+@dataclass(frozen=True, slots=True)
+class StagedSourceObject:
+    """尚未发布的原始文件；绝对路径仅在存储模块内部流转。"""
+
+    reference: str
+    _temporary_path: Path
+    _relative_path: PurePosixPath
+
+
+def _default_storage_root() -> Path:
+    data_root = os.getenv("YG_FT_DATA_ROOT", "").strip()
+    if data_root:
+        return Path(data_root).expanduser() / "data-process"
+    return Path(__file__).resolve().parents[3] / "storage" / "data-process"
+
+
+def _configured_storage_root() -> Path:
+    configured = os.getenv("DATA_PROCESS_STORAGE_DIR", "").strip()
+    if not configured:
+        return _default_storage_root()
+    path = Path(configured).expanduser()
+    # 相对配置固定以 backend 目录为基准，
+    # 避免从不同 cwd 启动时写入不同位置。
+    return path if path.is_absolute() else Path(__file__).resolve().parents[3] / path
+
+
+def _safe_component(value: str, label: str) -> str:
+    if not value or value in {".", ".."} or len(value) > 128:
+        raise DataProcessStorageError(f"invalid {label}")
+    if not value[0].isalnum() or any(
+        not (character.isalnum() or character in {"-", "_", "."})
+        for character in value
+    ):
+        raise DataProcessStorageError(f"invalid {label}")
+    return value
+
+
+def _safe_basename(value: str) -> str:
+    if not value or len(value.encode("utf-8")) > 255:
+        raise DataProcessStorageError("invalid source file name")
+    if value != Path(value).name or "/" in value or "\\" in value or "\x00" in value:
+        raise DataProcessStorageError("invalid source file name")
+    if value in {".", ".."} or any(
+        unicodedata.category(character).startswith("C") for character in value
+    ):
+        raise DataProcessStorageError("invalid source file name")
+    return value
+
+
+class LocalDataProcessStorage:
+    """Stage locally, but publish and read authoritative source files from MinIO."""
+
+    def __init__(self, root: str | os.PathLike[str] | Path | None = None) -> None:
+        configured = Path(root) if root is not None else _configured_storage_root()
+        configured = configured.expanduser()
+        if configured.exists() and configured.is_symlink():
+            raise DataProcessStorageError("data process storage root must not be a symlink")
+        configured.mkdir(parents=True, exist_ok=True, mode=0o700)
+        self._root = configured.resolve(strict=True)
+        # StagedSourceObject 本身是普通 dataclass，不能只依赖其中的路径字段判断
+        # 来源；只接受由当前存储实例实际签发的对象，
+        # 避免调用方伪造暂存路径。
+        self._issued_staged_objects: dict[Path, StagedSourceObject] = {}
+        self._ensure_directory(self._root / ".staging")
+
+    @property
+    def root(self) -> Path:
+        """仅供运维和测试检查；API 响应不得序列化该属性。"""
+
+        return self._root
+
+    def new_batch_id(self) -> str:
+        return f"batch-{uuid.uuid4().hex}"
+
+    def stage_bytes(
+        self,
+        *,
+        batch_id: str,
+        task_id: str,
+        source_file_id: str,
+        version: int,
+        name: str,
+        content: bytes,
+    ) -> StagedSourceObject:
+        batch_id = _safe_component(batch_id, "batch id")
+        task_id = _safe_component(task_id, "task id")
+        source_file_id = _safe_component(source_file_id, "source file id")
+        if isinstance(version, bool) or not isinstance(version, int) or version < 1:
+            raise DataProcessStorageError("invalid source file version")
+        basename = _safe_basename(name)
+        if not isinstance(content, bytes):
+            raise TypeError("content must be bytes")
+
+        batch_directory = self._ensure_directory(self._root / ".staging" / batch_id)
+        temporary_path = batch_directory / f"{source_file_id}-{uuid.uuid4().hex}.tmp"
+        flags = os.O_CREAT | os.O_EXCL | os.O_WRONLY
+        if hasattr(os, "O_NOFOLLOW"):
+            flags |= os.O_NOFOLLOW
+        descriptor = os.open(temporary_path, flags, 0o600)
+        try:
+            with os.fdopen(descriptor, "wb", closefd=True) as stream:
+                stream.write(content)
+                stream.flush()
+                os.fsync(stream.fileno())
+        except Exception:
+            temporary_path.unlink(missing_ok=True)
+            raise
+
+        relative_path = PurePosixPath(
+            task_id,
+            source_file_id,
+            f"v{version}",
+            basename,
+        )
+        reference = self._reference(task_id, source_file_id, version, basename)
+        staged = StagedSourceObject(reference, temporary_path, relative_path)
+        self._issued_staged_objects[temporary_path] = staged
+        return staged
+
+    def stage_copy(
+        self,
+        *,
+        batch_id: str,
+        source_reference: str,
+        expected_source_task_id: str,
+        expected_source_file_id: str,
+        task_id: str,
+        source_file_id: str,
+        version: int,
+        name: str,
+    ) -> StagedSourceObject:
+        """为不可变源对象创建独立目录项，不把大文件重新读入内存。"""
+
+        batch_id = _safe_component(batch_id, "batch id")
+        task_id = _safe_component(task_id, "task id")
+        source_file_id = _safe_component(source_file_id, "source file id")
+        if isinstance(version, bool) or not isinstance(version, int) or version < 1:
+            raise DataProcessStorageError("invalid source file version")
+        basename = _safe_basename(name)
+        source_relative = self._relative_from_reference(source_reference)
+        if source_relative is None:
+            raise DataProcessStorageError("original source object is not available")
+        self._assert_expected_owner(
+            source_relative,
+            expected_task_id=expected_source_task_id,
+            expected_source_file_id=expected_source_file_id,
+        )
+        if self._is_minio_reference(source_reference):
+            content = self.read(source_reference)
+            if content is None:
+                raise DataProcessStorageError("original source object is not available")
+            return self.stage_bytes(
+                batch_id=batch_id,
+                task_id=task_id,
+                source_file_id=source_file_id,
+                version=version,
+                name=basename,
+                content=content,
+            )
+        descriptor, source_info = self._open_read_descriptor(source_relative)
+        os.close(descriptor)
+
+        batch_directory = self._ensure_directory(self._root / ".staging" / batch_id)
+        temporary_path = batch_directory / f"{source_file_id}-{uuid.uuid4().hex}.tmp"
+        source_path = self._path_for_relative(source_relative)
+        try:
+            os.link(source_path, temporary_path, follow_symlinks=False)
+            copy_info = temporary_path.lstat()
+            if (
+                not stat.S_ISREG(copy_info.st_mode)
+                or source_info.st_dev != copy_info.st_dev
+                or source_info.st_ino != copy_info.st_ino
+            ):
+                raise DataProcessStorageError("source storage object changed while copying")
+        except Exception:
+            temporary_path.unlink(missing_ok=True)
+            raise
+
+        relative_path = PurePosixPath(
+            task_id,
+            source_file_id,
+            f"v{version}",
+            basename,
+        )
+        reference = self._reference(task_id, source_file_id, version, basename)
+        staged = StagedSourceObject(reference, temporary_path, relative_path)
+        self._issued_staged_objects[temporary_path] = staged
+        return staged
+
+    def publish(self, objects: Iterable[StagedSourceObject]) -> None:
+        staged = list(objects)
+        published: list[StagedSourceObject] = []
+        try:
+            seen_temporary_paths: set[Path] = set()
+            for item in staged:
+                self._validate_staged_object(item, require_file=True)
+                if item._temporary_path in seen_temporary_paths:
+                    raise DataProcessStorageError("duplicate staged source object")
+                seen_temporary_paths.add(item._temporary_path)
+            for item in staged:
+                if self._is_minio_reference(item.reference):
+                    content = item._temporary_path.read_bytes()
+                    get_object_storage().put_bytes(
+                        self.object_key(item.reference),
+                        content,
+                        "application/octet-stream",
+                    )
+                elif not item.reference.startswith("db://data-process/"):
+                    final_path = self._path_for_relative(item._relative_path)
+                    self._ensure_directory(final_path.parent)
+                    if final_path.exists() or final_path.is_symlink():
+                        raise DataProcessStorageError("source storage object already exists")
+                    os.link(item._temporary_path, final_path, follow_symlinks=False)
+                    self._fsync_directory(final_path.parent)
+                published.append(item)
+                item._temporary_path.unlink()
+        except Exception:
+            for item in reversed(published):
+                try:
+                    self.delete(item.reference)
+                except Exception:
+                    # 回滚必须尽量处理其余对象，并保留真正的发布异常。
+                    pass
+            for item in staged:
+                try:
+                    self.discard([item])
+                except Exception:
+                    pass
+            raise
+        self.discard(staged)
+
+    def discard(self, objects: Iterable[StagedSourceObject]) -> None:
+        staged = list(objects)
+        for item in staged:
+            self._validate_staged_object(item, require_file=False)
+
+        batch_directories: set[Path] = set()
+        first_error: Exception | None = None
+        for item in staged:
+            temporary_path = item._temporary_path
+            try:
+                temporary_path.unlink(missing_ok=True)
+            except Exception as exc:
+                if first_error is None:
+                    first_error = exc
+            else:
+                self._issued_staged_objects.pop(temporary_path, None)
+            batch_directories.add(temporary_path.parent)
+        for directory in batch_directories:
+            self._remove_empty_directory(directory)
+        if first_error is not None:
+            raise first_error
+
+    def read(self, reference: str) -> bytes | None:
+        """Read a MinIO object or legacy local reference."""
+
+        if self._is_minio_reference(reference):
+            try:
+                return get_object_storage().get_bytes(self.object_key(reference))
+            except Exception as exc:  # noqa: BLE001 - normalize object-not-found for callers
+                raise DataProcessStorageError("source storage object does not exist") from exc
+
+        relative_path = self._relative_from_reference(reference)
+        if relative_path is None:
+            return None
+        descriptor, _ = self._open_read_descriptor(relative_path)
+        with os.fdopen(descriptor, "rb", closefd=True) as stream:
+            return stream.read()
+
+    def file_size(
+        self,
+        reference: str,
+        *,
+        expected_task_id: str,
+        expected_source_file_id: str,
+    ) -> int | None:
+        """返回受控 local 对象大小；旧 ``db://`` 对象没有原始文件。"""
+
+        if self._is_minio_reference(reference):
+            try:
+                return int(get_object_storage().stat(self.object_key(reference)).get("byte_size") or 0)
+            except Exception as exc:  # noqa: BLE001
+                raise DataProcessStorageError("source storage object does not exist") from exc
+        relative_path = self._relative_from_reference(reference)
+        if relative_path is None:
+            return None
+        self._assert_expected_owner(
+            relative_path,
+            expected_task_id=expected_task_id,
+            expected_source_file_id=expected_source_file_id,
+        )
+        descriptor, info = self._open_read_descriptor(relative_path)
+        os.close(descriptor)
+        return info.st_size
+
+    def iter_bytes(
+        self,
+        reference: str,
+        *,
+        expected_task_id: str,
+        expected_source_file_id: str,
+        expected_size: int,
+        start: int = 0,
+        length: int | None = None,
+        chunk_size: int = 256 * 1024,
+    ) -> Iterator[bytes]:
+        """按范围流式读取原始文件，避免 PDF 预览把大文件整体载入内存。"""
+
+        if self._is_minio_reference(reference):
+            content = self.read(reference) or b""
+            if start < 0 or expected_size != len(content) or start > expected_size:
+                raise DataProcessStorageError("source object size does not match metadata")
+            remaining = expected_size - start if length is None else length
+            if remaining < 0 or start + remaining > expected_size:
+                raise DataProcessStorageError("invalid source byte range")
+            yield content[start : start + remaining]
+            return
+        relative_path = self._relative_from_reference(reference)
+        if relative_path is None:
+            raise DataProcessStorageError("original source object is not available")
+        self._assert_expected_owner(
+            relative_path,
+            expected_task_id=expected_task_id,
+            expected_source_file_id=expected_source_file_id,
+        )
+        if start < 0 or expected_size < 0 or chunk_size < 1:
+            raise DataProcessStorageError("invalid source byte range")
+        descriptor, info = self._open_read_descriptor(relative_path)
+        if info.st_size != expected_size:
+            os.close(descriptor)
+            raise DataProcessStorageError("source object size does not match metadata")
+        remaining = expected_size - start if length is None else length
+        if remaining < 0 or start + remaining > expected_size:
+            os.close(descriptor)
+            raise DataProcessStorageError("invalid source byte range")
+        with os.fdopen(descriptor, "rb", closefd=True) as stream:
+            stream.seek(start)
+            while remaining:
+                chunk = stream.read(min(chunk_size, remaining))
+                if not chunk:
+                    raise DataProcessStorageError("source object ended unexpectedly")
+                remaining -= len(chunk)
+                yield chunk
+
+    def validate_owner(
+        self,
+        reference: str,
+        *,
+        expected_task_id: str,
+        expected_source_file_id: str,
+    ) -> bool:
+        """校验 local 引用归属；旧 ``db://`` 引用无需文件系统处理。"""
+
+        if self._is_minio_reference(reference):
+            self._assert_minio_owner(reference, expected_task_id, expected_source_file_id)
+            return True
+        if str(reference or "").startswith("db://data-process/"):
+            self._assert_database_owner(reference, expected_task_id, expected_source_file_id)
+            return True
+        relative_path = self._relative_from_reference(reference)
+        if relative_path is None:
+            return False
+        self._assert_expected_owner(
+            relative_path,
+            expected_task_id=expected_task_id,
+            expected_source_file_id=expected_source_file_id,
+        )
+        return True
+
+    def _open_read_descriptor(
+        self,
+        relative_path: PurePosixPath,
+    ) -> tuple[int, os.stat_result]:
+        path = self._path_for_relative(relative_path)
+        self._assert_controlled_parent(path)
+        try:
+            before_open = path.lstat()
+        except FileNotFoundError as exc:
+            raise DataProcessStorageError("source storage object does not exist") from exc
+        if stat.S_ISLNK(before_open.st_mode) or not stat.S_ISREG(before_open.st_mode):
+            raise DataProcessStorageError("source storage object is not a regular file")
+        flags = os.O_RDONLY
+        if hasattr(os, "O_NOFOLLOW"):
+            flags |= os.O_NOFOLLOW
+        descriptor = os.open(path, flags)
+        after_open = os.fstat(descriptor)
+        if (
+            not stat.S_ISREG(after_open.st_mode)
+            or before_open.st_dev != after_open.st_dev
+            or before_open.st_ino != after_open.st_ino
+        ):
+            os.close(descriptor)
+            raise DataProcessStorageError("source storage object changed while opening")
+        return descriptor, after_open
+
+    def delete(
+        self,
+        reference: str,
+        *,
+        expected_task_id: str | None = None,
+        expected_source_file_id: str | None = None,
+    ) -> bool:
+        """删除受控 local 对象；旧 ``db://`` 引用保持不变。"""
+
+        if self._is_minio_reference(reference):
+            if (expected_task_id is None) != (expected_source_file_id is None):
+                raise DataProcessStorageError("both expected storage owner fields are required")
+            if expected_task_id is not None and expected_source_file_id is not None:
+                self._assert_minio_owner(reference, expected_task_id, expected_source_file_id)
+            get_object_storage().delete(self.object_key(reference))
+            return True
+        if str(reference or "").startswith("db://data-process/"):
+            if (expected_task_id is None) != (expected_source_file_id is None):
+                raise DataProcessStorageError("both expected storage owner fields are required")
+            if expected_task_id is not None and expected_source_file_id is not None:
+                self._assert_database_owner(reference, expected_task_id, expected_source_file_id)
+            return False
+        relative_path = self._relative_from_reference(reference)
+        if relative_path is None:
+            return False
+        if (expected_task_id is None) != (expected_source_file_id is None):
+            raise DataProcessStorageError("both expected storage owner fields are required")
+        if expected_task_id is not None and expected_source_file_id is not None:
+            self._assert_expected_owner(
+                relative_path,
+                expected_task_id=expected_task_id,
+                expected_source_file_id=expected_source_file_id,
+            )
+        path = self._path_for_relative(relative_path)
+        self._assert_controlled_parent(path)
+        try:
+            info = path.lstat()
+        except FileNotFoundError:
+            return False
+        if stat.S_ISLNK(info.st_mode) or not stat.S_ISREG(info.st_mode):
+            raise DataProcessStorageError("refusing to delete a non-regular storage object")
+        path.unlink()
+        self._fsync_directory(path.parent)
+        for directory in (path.parent, path.parent.parent, path.parent.parent.parent):
+            self._remove_empty_directory(directory)
+        return True
+
+    @staticmethod
+    def _assert_expected_owner(
+        relative_path: PurePosixPath,
+        *,
+        expected_task_id: str,
+        expected_source_file_id: str,
+    ) -> None:
+        task_id = _safe_component(expected_task_id, "expected task id")
+        source_file_id = _safe_component(
+            expected_source_file_id,
+            "expected source file id",
+        )
+        if relative_path.parts[:2] != (task_id, source_file_id):
+            raise DataProcessStorageError("source storage object owner mismatch")
+
+    def _relative_from_reference(self, reference: str) -> PurePosixPath | None:
+        if reference.startswith("db://"):
+            return None
+        parsed = urlsplit(reference)
+        if parsed.scheme not in {"local", "minio"} or parsed.netloc != "data-process":
+            raise DataProcessStorageError("unsupported source storage reference")
+        if parsed.query or parsed.fragment or "\\" in parsed.path:
+            raise DataProcessStorageError("unsafe source storage reference")
+        raw_parts = parsed.path.lstrip("/").split("/")
+        if len(raw_parts) != 4:
+            raise DataProcessStorageError("unsafe source storage reference")
+        if any(re.search(r"%(?![0-9A-Fa-f]{2})", part) for part in raw_parts):
+            raise DataProcessStorageError("unsafe source storage reference")
+        try:
+            decoded = [unquote(part, encoding="utf-8", errors="strict") for part in raw_parts]
+        except UnicodeDecodeError as exc:
+            raise DataProcessStorageError("unsafe source storage reference") from exc
+        if any("/" in part or "\\" in part for part in decoded):
+            raise DataProcessStorageError("unsafe source storage reference")
+        canonical_parts = [
+            quote(decoded[0], safe="-_."),
+            quote(decoded[1], safe="-_."),
+            quote(decoded[2], safe="-_."),
+            quote(decoded[3], safe=""),
+        ]
+        if canonical_parts != raw_parts:
+            raise DataProcessStorageError("source storage reference is not canonical")
+        task_id = _safe_component(decoded[0], "task id")
+        source_file_id = _safe_component(decoded[1], "source file id")
+        version_component = decoded[2]
+        if not version_component.startswith("v") or not version_component[1:].isdigit():
+            raise DataProcessStorageError("invalid source file version")
+        version = int(version_component[1:])
+        if version < 1:
+            raise DataProcessStorageError("invalid source file version")
+        basename = _safe_basename(decoded[3])
+        return PurePosixPath(task_id, source_file_id, f"v{version}", basename)
+
+    @staticmethod
+    def _is_minio_reference(reference: str) -> bool:
+        return str(reference or "").startswith("minio://data-process/")
+
+    @staticmethod
+    def _reference(task_id: str, source_file_id: str, version: int, basename: str) -> str:
+        scheme = "minio" if get_settings().minio_enabled else "local"
+        return f"{scheme}://data-process/{task_id}/{source_file_id}/v{version}/{quote(basename, safe='')}"
+
+    @staticmethod
+    def object_key(reference: str) -> str:
+        parsed = urlsplit(reference)
+        if parsed.scheme != "minio" or parsed.netloc != "data-process":
+            raise DataProcessStorageError("reference is not a MinIO source object")
+        return "data-process/" + parsed.path.lstrip("/")
+
+    def _assert_minio_owner(self, reference: str, task_id: str, source_file_id: str) -> None:
+        relative = self._relative_from_reference(reference)
+        if relative is None:
+            raise DataProcessStorageError("invalid MinIO source reference")
+        self._assert_expected_owner(relative, expected_task_id=task_id, expected_source_file_id=source_file_id)
+
+    @staticmethod
+    def _assert_database_owner(reference: str, task_id: str, source_file_id: str) -> None:
+        parsed = urlsplit(reference)
+        parts = parsed.path.lstrip("/").split("/")
+        if parsed.netloc != "data-process" or len(parts) != 3:
+            raise DataProcessStorageError("invalid database source reference")
+        expected_task_id = _safe_component(task_id, "expected task id")
+        expected_source_file_id = _safe_component(source_file_id, "expected source file id")
+        if tuple(parts[:2]) != (expected_task_id, expected_source_file_id) or parts[2] != "v1":
+            raise DataProcessStorageError("source storage object owner mismatch")
+
+    def _path_for_relative(self, relative_path: PurePosixPath) -> Path:
+        if relative_path.is_absolute() or any(
+            part in {"", ".", ".."} for part in relative_path.parts
+        ):
+            raise DataProcessStorageError("storage path escapes the configured root")
+        path = self._root.joinpath(*relative_path.parts)
+        self._assert_controlled_parent(path)
+        return path
+
+    def _validate_staged_object(
+        self,
+        item: StagedSourceObject,
+        *,
+        require_file: bool,
+    ) -> None:
+        if not isinstance(item, StagedSourceObject):
+            raise DataProcessStorageError("invalid staged source object")
+        if self._issued_staged_objects.get(item._temporary_path) is not item:
+            raise DataProcessStorageError("staged source object was not issued by this storage")
+        if item.reference.startswith("db://data-process/"):
+            parsed = urlsplit(item.reference)
+            parts = parsed.path.lstrip("/").split("/")
+            expected = item._relative_path.parts[:3]
+            if (
+                parsed.netloc != "data-process"
+                or parsed.query
+                or parsed.fragment
+                or len(parts) != 3
+                or tuple(parts) != expected
+            ):
+                raise DataProcessStorageError("staged source object reference mismatch")
+        else:
+            expected_relative = self._relative_from_reference(item.reference)
+            if expected_relative is None or expected_relative != item._relative_path:
+                raise DataProcessStorageError("staged source object reference mismatch")
+        staging_root = self._root / ".staging"
+        try:
+            relative_temporary = item._temporary_path.relative_to(staging_root)
+        except ValueError as exc:
+            raise DataProcessStorageError("staged source object escapes staging") from exc
+        if len(relative_temporary.parts) != 2:
+            raise DataProcessStorageError("invalid staged source object path")
+        _safe_component(relative_temporary.parts[0], "batch id")
+        _safe_basename(relative_temporary.parts[1])
+        self._assert_controlled_parent(item._temporary_path)
+        try:
+            info = item._temporary_path.lstat()
+        except FileNotFoundError:
+            if require_file:
+                raise DataProcessStorageError("staged source object does not exist") from None
+            return
+        if stat.S_ISLNK(info.st_mode) or not stat.S_ISREG(info.st_mode):
+            raise DataProcessStorageError("staged source object is not a regular file")
+
+    def _ensure_directory(self, directory: Path) -> Path:
+        try:
+            relative = directory.relative_to(self._root)
+        except ValueError as exc:
+            raise DataProcessStorageError("storage path escapes the configured root") from exc
+        current = self._root
+        for component in relative.parts:
+            current = current / component
+            try:
+                current.mkdir(mode=0o700)
+            except FileExistsError:
+                pass
+            info = current.lstat()
+            if stat.S_ISLNK(info.st_mode) or not stat.S_ISDIR(info.st_mode):
+                raise DataProcessStorageError("storage path contains a symlink or non-directory")
+        return directory
+
+    def _assert_controlled_parent(self, path: Path) -> None:
+        try:
+            relative_parent = path.parent.relative_to(self._root)
+        except ValueError as exc:
+            raise DataProcessStorageError("storage path escapes the configured root") from exc
+        current = self._root
+        for component in relative_parent.parts:
+            current = current / component
+            if not current.exists():
+                continue
+            info = current.lstat()
+            if stat.S_ISLNK(info.st_mode) or not stat.S_ISDIR(info.st_mode):
+                raise DataProcessStorageError("storage path contains a symlink or non-directory")
+
+    @staticmethod
+    def _fsync_directory(directory: Path) -> None:
+        # Windows 不支持以 O_RDONLY 打开目录做 fsync，跳过即可。
+        # 数据完整性在 Linux 生产环境保障，Windows 开发环境忽略。
+        if os.name == "nt":
+            return
+        descriptor = os.open(directory, os.O_RDONLY)
+        try:
+            os.fsync(descriptor)
+        finally:
+            os.close(descriptor)
+
+    def _remove_empty_directory(self, directory: Path) -> None:
+        if directory in {self._root, self._root / ".staging"}:
+            return
+        self._assert_controlled_parent(directory / "placeholder")
+        try:
+            directory.rmdir()
+        except (FileNotFoundError, OSError):
+            return
+
+
+@lru_cache
+def get_data_process_storage() -> LocalDataProcessStorage:
+    return LocalDataProcessStorage()
+
+
+__all__ = [
+    "DataProcessStorageError",
+    "LocalDataProcessStorage",
+    "StagedSourceObject",
+    "get_data_process_storage",
+]

backend/app/modules/data_process/store/__init__.py

@@ -0,0 +1,69 @@
+"""数据处理存储层。"""
+
+from .base import (
+    StoreBase,
+    DataProcessStoreError,
+    NotFoundError,
+    ConflictError,
+    InvalidStateError,
+    utcnow,
+    new_id,
+    repeat_task_id,
+    json_dumps,
+    TASK_STATUSES,
+    EDITABLE_STATUSES,
+    ACTIVE_PREVIEW_STATUSES,
+    WORKFLOW_STEPS,
+    _decode_row,
+    _preview_config_changed,
+    _reasoning_output_is_valid,
+    _source_storage_descriptor,
+)
+from .tasks import TasksMixin
+from .source_files import SourceFilesMixin
+from .preview import PreviewMixin
+from .generation import GenerationMixin
+from .results import ResultsMixin
+from .datasets import DatasetsMixin
+
+
+class DataProcessStore(
+    StoreBase,
+    TasksMixin,
+    SourceFilesMixin,
+    PreviewMixin,
+    GenerationMixin,
+    ResultsMixin,
+    DatasetsMixin,
+):
+    """数据处理持久层。
+
+    构造函数不会连接数据库或执行迁移。部署方必须显式执行 002 SQL，
+    或在受控的管理命令中调用 :meth:`ensure_schema`，避免应用启动时
+    修改远程数据库。
+    """
+    pass
+
+
+def get_data_process_store() -> DataProcessStore:
+    """获取数据处理存储实例。"""
+    return DataProcessStore()
+
+
+__all__ = [
+    "DataProcessStore",
+    "DataProcessStoreError",
+    "NotFoundError",
+    "ConflictError",
+    "InvalidStateError",
+    "get_data_process_store",
+    "utcnow",
+    "new_id",
+    "repeat_task_id",
+    "TASK_STATUSES",
+    "EDITABLE_STATUSES",
+    "_decode_row",
+    "_preview_config_changed",
+    "_reasoning_output_is_valid",
+    "_source_storage_descriptor",
+]

backend/app/modules/data_process/store/base.py

@@ -0,0 +1,310 @@
+"""数据处理存储层 - 基础设施。
+
+包含：异常类、工具函数、常量定义、基类。
+"""
+
+from __future__ import annotations
+
+import hashlib
+import json
+import re
+import uuid
+from collections.abc import Iterator
+from contextlib import contextmanager
+from datetime import UTC, date, datetime
+from decimal import Decimal
+from pathlib import Path
+from typing import Any
+
+import psycopg
+from psycopg.rows import dict_row
+
+from app.core.config import get_settings
+
+# 常量定义
+TASK_STATUSES = {"pending", "running", "completed", "failed", "stopped"}
+EDITABLE_STATUSES = {"pending", "failed", "stopped", "completed"}
+ACTIVE_PREVIEW_STATUSES = {"queued", "running"}
+WORKFLOW_STEPS = {"create", "model", "upload", "preview", "generate", "results"}
+
+_PREVIEW_CONFIG_ALIASES = {
+    "preprocess_options": "preprocessOptions",
+    "chunk_method": "chunkMethod",
+    "chunk_size": "chunkSize",
+    "chunk_overlap": "chunkOverlap",
+    "min_chunk_size": "minChunkSize",
+    "semantic_breakpoint_percentile": "semanticBreakpointPercentile",
+    "preserve_tables": "preserveTables",
+    "preserve_code_blocks": "preserveCodeBlocks",
+    "preserve_lists": "preserveLists",
+}
+
+_UNSTRUCTURED_PREVIEW_DEFAULTS: dict[str, Any] = {
+    "chunk_method": "layout_hybrid",
+    "chunk_size": 800,
+    "chunk_overlap": 100,
+    "min_chunk_size": 100,
+    "semantic_breakpoint_percentile": 95,
+    "preserve_tables": True,
+    "preserve_code_blocks": True,
+    "preserve_lists": True,
+}
+
+_REGENERATION_MARKER_KEY = "_regeneration_prepared"
+_REPEAT_SOURCE_TASK_KEY = "_repeat_source_task_id"
+_REPEAT_REQUEST_KEY = "_repeat_request_id"
+_INTERNAL_CONFIG_KEYS = {
+    _REGENERATION_MARKER_KEY,
+    _REPEAT_SOURCE_TASK_KEY,
+    _REPEAT_REQUEST_KEY,
+}
+
+
+# 异常类
+class DataProcessStoreError(RuntimeError):
+    pass
+
+
+class NotFoundError(DataProcessStoreError):
+    pass
+
+
+class ConflictError(DataProcessStoreError):
+    pass
+
+
+class InvalidStateError(DataProcessStoreError):
+    pass
+
+
+# 工具函数
+def utcnow() -> str:
+    return datetime.now(UTC).replace(microsecond=0).isoformat().replace("+00:00", "Z")
+
+
+def new_id(prefix: str) -> str:
+    return f"{prefix}_{uuid.uuid4().hex[:20]}"
+
+
+def repeat_task_id(source_task_id: str, request_id: str) -> str:
+    """按源任务和请求幂等键生成稳定的新任务 ID。"""
+    digest = hashlib.sha256(f"{source_task_id}:{request_id}".encode()).hexdigest()
+    return f"dpt_{digest[:20]}"
+
+
+def json_dumps(value: Any) -> str:
+    return json.dumps(value, ensure_ascii=False, separators=(",", ":"))
+
+
+def _database_url(value: str) -> str:
+    return value.replace("postgresql+psycopg://", "postgresql://")
+
+
+def _json_value(value: Any, default: Any) -> Any:
+    if value is None or value == "":
+        return default
+    if isinstance(value, (dict, list)):
+        return value
+    try:
+        return json.loads(value)
+    except (TypeError, json.JSONDecodeError):
+        return default
+
+
+def _task_output_type(task: dict[str, Any]) -> str:
+    config = _json_value(task.get("config"), {})
+    if not isinstance(config, dict):
+        return "standard"
+    return str(config.get("output_type") or config.get("outputType") or "standard")
+
+
+def _task_reasoning_detail(task: dict[str, Any]) -> str:
+    config = _json_value(task.get("config"), {})
+    if not isinstance(config, dict):
+        return "normal"
+    return str(
+        config.get("reasoning_detail")
+        or config.get("reasoningDetail")
+        or "normal"
+    )
+
+
+def _reasoning_output_is_valid(value: Any) -> bool:
+    match = re.fullmatch(
+        r"\s*<think>\s*(?P<reasoning>[\s\S]*?)\s*</think>\s*(?P<answer>[\s\S]+?)\s*",
+        str(value or ""),
+        flags=re.IGNORECASE,
+    )
+    return bool(
+        match
+        and match.group("reasoning").strip()
+        and match.group("answer").strip()
+        and all(
+            tag not in part.lower()
+            for tag in ("<think", "</think")
+            for part in (match.group("reasoning"), match.group("answer"))
+        )
+    )
+
+
+def _dpo_fields_are_valid(row: dict[str, Any]) -> bool:
+    chosen = str(row.get("chosen") or "").strip()
+    rejected = str(row.get("rejected") or "").strip()
+    return bool(chosen and rejected and chosen != rejected)
+
+
+def _preview_config_value(config: dict[str, Any], key: str, default: Any) -> Any:
+    if key in config:
+        return config[key]
+    return config.get(_PREVIEW_CONFIG_ALIASES[key], default)
+
+
+def _normalized_preprocess_options(config: dict[str, Any]) -> Any:
+    value = _preview_config_value(config, "preprocess_options", [])
+    if isinstance(value, (list, tuple, set)):
+        return tuple(sorted({str(item) for item in value}))
+    return value
+
+
+def _preview_config_projection(
+    process_type: str,
+    config: dict[str, Any],
+) -> dict[str, Any]:
+    """只投影会改变预览切片的配置。
+
+    生成模型、提示词、温度等参数不影响源文切片，因此不应该
+    破坏用户已经校对过的预览内容。
+    """
+    projection: dict[str, Any] = {
+        "preprocess_options": _normalized_preprocess_options(config),
+    }
+    if process_type != "unstructured":
+        return projection
+    for key, default in _UNSTRUCTURED_PREVIEW_DEFAULTS.items():
+        projection[key] = _preview_config_value(config, key, default)
+    return projection
+
+
+def _preview_config_changed(
+    process_type: str,
+    current_config: dict[str, Any],
+    next_config: dict[str, Any],
+) -> bool:
+    return _preview_config_projection(process_type, current_config) != _preview_config_projection(
+        process_type, next_config
+    )
+
+
+def _regeneration_marker(task: dict[str, Any]) -> dict[str, Any] | None:
+    config = task.get("config")
+    if not isinstance(config, dict):
+        return None
+    marker = config.get(_REGENERATION_MARKER_KEY)
+    if not isinstance(marker, dict) or marker.get("prepared") is not True:
+        return None
+    return marker
+
+
+def _is_regeneration_prepared(task: dict[str, Any]) -> bool:
+    return _regeneration_marker(task) is not None
+
+
+def _business_config(config: dict[str, Any] | None) -> dict[str, Any]:
+    """过滤只供服务端维护的工作流标记。"""
+    return {
+        key: value
+        for key, value in (config or {}).items()
+        if key not in _INTERNAL_CONFIG_KEYS
+    }
+
+
+def _public_task(item: dict[str, Any] | None) -> dict[str, Any] | None:
+    """从 API 任务快照中移除服务端内部工作流标记。"""
+    if item is None:
+        return None
+    public = dict(item)
+    config = public.get("config")
+    if isinstance(config, dict):
+        public["config"] = _business_config(config)
+    return public
+
+
+def _serialize_value(value: Any) -> Any:
+    if isinstance(value, (datetime, date)):
+        return value.isoformat().replace("+00:00", "Z")
+    if isinstance(value, Decimal):
+        return float(value)
+    return value
+
+
+def _source_storage_descriptor(
+    payload: dict[str, Any],
+    task_id: str,
+    file_id: str,
+) -> tuple[str, dict[str, Any]]:
+    storage_object_id = str(
+        payload.get("storage_object_id")
+        or f"db://data-process/{task_id}/{file_id}/v1"
+    )
+    expected_local_prefix = f"local://data-process/{task_id}/{file_id}/v1/"
+    expected_minio_prefix = f"minio://data-process/{task_id}/{file_id}/v1/"
+    expected_database_reference = f"db://data-process/{task_id}/{file_id}/v1"
+    if storage_object_id.startswith(expected_local_prefix) and len(storage_object_id) > len(
+        expected_local_prefix
+    ):
+        storage_backend = "local"
+    elif storage_object_id.startswith(expected_minio_prefix) and len(storage_object_id) > len(
+        expected_minio_prefix
+    ):
+        storage_backend = "minio"
+    elif storage_object_id == expected_database_reference:
+        storage_backend = "database"
+    elif storage_object_id.startswith(("local://data-process/", "minio://data-process/", "db://data-process/")):
+        raise DataProcessStoreError("source storage object owner mismatch")
+    else:
+        raise DataProcessStoreError("unsupported source storage object reference")
+    metadata = {
+        **(payload.get("metadata") or {}),
+        "storage_backend": storage_backend,
+    }
+    return storage_object_id, metadata
+
+
+def _decode_row(row: dict[str, Any] | None) -> dict[str, Any] | None:
+    if row is None:
+        return None
+    item = {key: _serialize_value(value) for key, value in row.items()}
+    for key, default in {
+        "config": {},
+        "metadata": {},
+        "quality_score": {},
+        "versions": [],
+        "output_datasets": [],
+    }.items():
+        if key in item:
+            item[key] = _json_value(item[key], default)
+    return item
+
+
+class StoreBase:
+    """数据处理存储基类。"""
+
+    def __init__(self, database_url: str | None = None) -> None:
+        self.database_url = _database_url(database_url or get_settings().database_url)
+
+    @contextmanager
+    def connect(self) -> Iterator[psycopg.Connection[dict[str, Any]]]:
+        with psycopg.connect(self.database_url, row_factory=dict_row) as conn:
+            try:
+                yield conn
+                conn.commit()
+            except Exception:
+                conn.rollback()
+                raise
+
+    def ensure_schema(self) -> None:
+        """显式安装数据处理表；API 路由和应用启动流程不会调用此方法。"""
+        schema_path = Path(__file__).resolve().parents[3] / "db" / "sql" / "002_data_process.sql"
+        sql = schema_path.read_text(encoding="utf-8")
+        with self.connect() as conn, conn.cursor() as cursor:
+            cursor.execute(sql)

backend/app/modules/data_process/store/datasets.py

@@ -0,0 +1,567 @@
+"""数据处理存储层 - 数据集发布。"""
+
+from __future__ import annotations
+
+from typing import Any
+from collections.abc import Sequence
+
+import hashlib
+
+import psycopg
+
+from app.core.config import get_settings
+from app.modules.storage.minio_store import get_object_storage
+from app.modules.storage.policy import should_store_in_minio
+
+from .base import (
+    StoreBase,
+    utcnow,
+    new_id,
+    repeat_task_id,
+    json_dumps,
+    _json_value,
+    _decode_row,
+    _public_task,
+    _business_config,
+    _preview_config_value,
+    _preview_config_changed,
+    _preview_config_projection,
+    _normalized_preprocess_options,
+    _regeneration_marker,
+    _is_regeneration_prepared,
+    _task_output_type,
+    _task_reasoning_detail,
+    _reasoning_output_is_valid,
+    _dpo_fields_are_valid,
+    _source_storage_descriptor,
+    NotFoundError,
+    ConflictError,
+    InvalidStateError,
+    EDITABLE_STATUSES,
+    ACTIVE_PREVIEW_STATUSES,
+    WORKFLOW_STEPS,
+    _REGENERATION_MARKER_KEY,
+    _REPEAT_SOURCE_TASK_KEY,
+    _REPEAT_REQUEST_KEY,
+)
+
+from ..algorithms import stable_split_assignments
+
+class DatasetsMixin:
+    """数据集发布 Mixin。"""
+
+    def get_generation_model(self, model_id: str) -> dict[str, Any]:
+        with self.connect() as conn:
+            row = conn.execute(
+                """
+                SELECT id, name, type, purpose, model_source, description, path,
+                       api_url, api_key, online_model_name, create_time
+                FROM models WHERE id=%s
+                """,
+                (model_id,),
+            ).fetchone()
+        if not row:
+            raise NotFoundError("generation model not found")
+        return _decode_row(row) or {}
+
+    def save_generation_model_snapshot(
+        self,
+        task_id: str,
+        model_snapshot: dict[str, Any],
+        *,
+        generation_run_id: str,
+    ) -> dict[str, Any]:
+        # API 密钥仅用于本次调用，绝不能进入任务配置、详情响应或审计快照。
+        safe_snapshot = {
+            key: value for key, value in model_snapshot.items() if key != "api_key"
+        }
+        with self.connect() as conn:
+            task = self._task_in_connection(conn, task_id, for_update=True)
+            if (
+                task["status"] != "running"
+                or task.get("generation_run_id") != generation_run_id
+            ):
+                raise InvalidStateError("generation run is no longer active")
+            config = dict(task.get("config") or {})
+            config["generation_model_snapshot"] = safe_snapshot
+            row = conn.execute(
+                """
+                UPDATE data_process_tasks SET config=%s, updated_at=%s
+                WHERE id=%s AND generation_run_id=%s RETURNING *
+                """,
+                (json_dumps(config), utcnow(), task_id, generation_run_id),
+            ).fetchone()
+        return _decode_row(row) or {}
+
+    def publish(self, task_id: str, payload: dict[str, Any]) -> dict[str, Any]:
+        """按精确配额发布训练、验证、测试三个独立数据集。"""
+        with self.connect() as conn:
+            task = self._task_in_connection(conn, task_id, for_update=True)
+            if _is_regeneration_prepared(task):
+                raise InvalidStateError(
+                    "regeneration must start and complete before publishing"
+                )
+            if task["status"] != "completed":
+                raise InvalidStateError("only a completed task can be published")
+            if not task.get("results_confirmed"):
+                raise InvalidStateError("results must be confirmed before publishing")
+            rows = conn.execute(
+                """
+                SELECT * FROM data_process_results
+                WHERE task_id=%s ORDER BY created_at, id
+                """,
+                (task_id,),
+            ).fetchall()
+            if not rows:
+                raise InvalidStateError("task has no results to publish")
+            invalid_count = sum(
+                1
+                for row in rows
+                if row["status"] == "invalid"
+                or not str(row.get("instruction") or "").strip()
+                or not str(row.get("output") or "").strip()
+                or (
+                    _task_output_type(task) == "reasoning"
+                    and not _reasoning_output_is_valid(row.get("output"))
+                )
+                or (
+                    _task_output_type(task) == "dpo"
+                    and not _dpo_fields_are_valid(row)
+                )
+            )
+            if invalid_count:
+                raise InvalidStateError(f"task contains {invalid_count} invalid results")
+
+            now = utcnow()
+            requested_split = payload.get("split") or {
+                "train": 80,
+                "validation": 10,
+                "test": 10,
+            }
+            assignments = stable_split_assignments(
+                [str(row["id"]) for row in rows],
+                requested_split,
+                seed=task_id,
+            )
+            if _task_output_type(task) == "dpo":
+                records = [
+                    {
+                        "instruction": row["instruction"],
+                        "input": row["input"],
+                        "chosen": row["chosen"],
+                        "rejected": row["rejected"],
+                        "split": assignment,
+                    }
+                    for row, assignment in zip(rows, assignments, strict=True)
+                ]
+            else:
+                records = [
+                    {
+                        "instruction": row["instruction"],
+                        "input": row["input"],
+                        "output": row["output"],
+                        "split": assignment,
+                    }
+                    for row, assignment in zip(rows, assignments, strict=True)
+                ]
+            split_order = ("train", "validation", "test")
+            split_counts = {
+                split_name: assignments.count(split_name) for split_name in split_order
+            }
+            split_specs: list[dict[str, Any]] = []
+            # Explicit local is retained for old callers/tests that request the
+            # legacy backend; all normal platform requests default to MinIO.
+            allow_minio = bool(get_settings().minio_enabled) and str(
+                payload.get("storage_type") or "minio"
+            ).lower() != "local"
+            for split_name in split_order:
+                split_records = [
+                    (source_row, record)
+                    for source_row, record in zip(rows, records, strict=True)
+                    if record["split"] == split_name
+                ]
+                file_id = new_id("dfile")
+                version_id = new_id("dfv")
+                content = "".join(
+                    json_dumps(record) + "\n" for _, record in split_records
+                )
+                raw = content.encode("utf-8")
+                split_specs.append(
+                    {
+                        "split": split_name,
+                        "records": split_records,
+                        "file_id": file_id,
+                        "version_id": version_id,
+                        "content": content,
+                        "raw": raw,
+                        "checksum": hashlib.sha256(raw).hexdigest(),
+                        "storage_object_id": (
+                            f"db://data-process/{task_id}/{file_id}/v1"
+                        ),
+                        "store_in_minio": allow_minio and should_store_in_minio(
+                            len(raw), content_type="application/jsonl", file_format="jsonl"
+                        ),
+                    }
+                )
+            source_result_ids = [row["id"] for row in rows]
+            common_metadata = {
+                "source": "data_process",
+                "storage_backend": "minio" if any(spec["store_in_minio"] for spec in split_specs) else "database",
+                "source_task_id": task_id,
+                "output_type": _task_output_type(task),
+                "reasoning_detail": _task_reasoning_detail(task),
+                "source_file_ids": [item["id"] for item in self._source_ids(conn, task_id)],
+                "source_result_ids": source_result_ids,
+                "format": (
+                    "dpo"
+                    if _task_output_type(task) == "dpo"
+                    else payload.get("format") or "alpaca_jsonl"
+                ),
+                "split": requested_split,
+            }
+
+            existing_datasets = conn.execute(
+                """
+                SELECT * FROM datasets
+                WHERE source='task' AND deleted_at IS NULL
+                  AND (
+                      source_task_id=%s
+                      OR (source_task_id IS NULL AND task_id=%s)
+                  )
+                ORDER BY created_at, id
+                """,
+                (task_id, task_id),
+            ).fetchall()
+            existing_by_split: dict[str, dict[str, Any]] = {}
+            primary_existing = None
+            for existing in existing_datasets:
+                existing_metadata = _json_value(existing.get("metadata"), {})
+                existing_split = str(existing_metadata.get("dataset_split") or "")
+                if existing_split in split_order:
+                    existing_by_split[existing_split] = existing
+                if str(existing["id"]) == str(task.get("output_dataset_id") or ""):
+                    primary_existing = existing
+            if primary_existing and "train" not in existing_by_split:
+                # 兼容旧版“一个数据集包含三个文件”的发布物，原数据集复用为训练集。
+                existing_by_split["train"] = primary_existing
+
+            existing_group_metadata = _json_value(
+                (primary_existing or {}).get("metadata"), {}
+            )
+            base_dataset_name = str(
+                existing_group_metadata.get("base_dataset_name")
+                or payload["dataset_name"]
+            ).strip()
+            for suffix in ("-训练集", "-验证集", "-测试集"):
+                if base_dataset_name.endswith(suffix):
+                    base_dataset_name = base_dataset_name[: -len(suffix)].rstrip()
+                    break
+            split_group_id = str(
+                existing_group_metadata.get("split_group_id")
+                or f"dsg_{hashlib.sha256(task_id.encode()).hexdigest()[:20]}"
+            )
+            dataset_ids = {
+                spec["split"]: str(existing_by_split[spec["split"]]["id"])
+                if spec["split"] in existing_by_split
+                else new_id("dataset")
+                for spec in split_specs
+            }
+            created_any = any(
+                spec["split"] not in existing_by_split for spec in split_specs
+            )
+            split_labels = {
+                "train": "训练集",
+                "validation": "验证集",
+                "test": "测试集",
+            }
+            dataset_types = {"train": "train", "validation": "val", "test": "test"}
+            published_datasets: list[dict[str, Any]] = []
+            try:
+                for spec in split_specs:
+                    split_name = str(spec["split"])
+                    dataset_id = dataset_ids[split_name]
+                    storage_object_id = str(spec["storage_object_id"])
+                    if spec["store_in_minio"]:
+                        file_name = f"{base_dataset_name}.{split_name}.jsonl"
+                        object_key = f"datasets/{dataset_id}/versions/{spec['version_id']}/{file_name}"
+                        uploaded = get_object_storage().put_bytes(
+                            object_key,
+                            spec["raw"],
+                            "application/jsonl",
+                        )
+                        conn.execute(
+                            """
+                            INSERT INTO storage_objects
+                            (id, resource_type, resource_id, version_id, bucket, object_key,
+                             file_name, content_type, checksum_sha256, byte_size, status,
+                             created_by, create_time)
+                            VALUES (%s, 'dataset', %s, %s, %s, %s, %s, %s, %s, %s,
+                                    'available', %s, %s)
+                            ON CONFLICT (resource_type, resource_id, version_id, object_key)
+                            DO UPDATE SET file_name=EXCLUDED.file_name,
+                                content_type=EXCLUDED.content_type,
+                                checksum_sha256=EXCLUDED.checksum_sha256,
+                                byte_size=EXCLUDED.byte_size,
+                                status='available',
+                                created_by=EXCLUDED.created_by
+                            """,
+                            (
+                                new_id("object"),
+                                dataset_id,
+                                spec["version_id"],
+                                uploaded["bucket"],
+                                object_key,
+                                file_name,
+                                "application/jsonl",
+                                spec["checksum"],
+                                len(spec["raw"]),
+                                payload.get("created_by") or task.get("created_by"),
+                                now,
+                            ),
+                        )
+                        storage_object_id = conn.execute(
+                            """
+                            SELECT id FROM storage_objects
+                            WHERE resource_type='dataset' AND resource_id=%s
+                              AND version_id=%s AND object_key=%s
+                            """,
+                            (dataset_id, spec["version_id"], object_key),
+                        ).fetchone()["id"]
+                    existing_dataset = existing_by_split.get(split_name)
+                    dataset_metadata = {
+                        **common_metadata,
+                        "base_dataset_name": base_dataset_name,
+                        "dataset_split": split_name,
+                        "split_group_id": split_group_id,
+                        "split_dataset_ids": dataset_ids,
+                        "split_counts": {
+                            name: split_counts[name] if name == split_name else 0
+                            for name in split_order
+                        },
+                    }
+                    dataset_name = f"{base_dataset_name}-{split_labels[split_name]}"
+                    if existing_dataset:
+                        conn.execute(
+                            "DELETE FROM dataset_records WHERE dataset_id=%s", (dataset_id,)
+                        )
+                        conn.execute(
+                            """DELETE FROM dataset_file_versions
+                               WHERE dataset_file_id IN
+                               (SELECT id FROM dataset_files WHERE dataset_id=%s)""",
+                            (dataset_id,),
+                        )
+                        conn.execute(
+                            "DELETE FROM dataset_files WHERE dataset_id=%s", (dataset_id,)
+                        )
+                        dataset = conn.execute(
+                            """
+                            UPDATE datasets
+                            SET name=%s, type=%s, storage_type=%s, size=%s, size_bytes=%s,
+                                count=%s, record_count=%s, description=%s, metadata=%s,
+                                updated_at=%s
+                            WHERE id=%s RETURNING *
+                            """,
+                            (
+                                dataset_name,
+                                dataset_types[split_name],
+                        "minio" if spec["store_in_minio"] else "database",
+                                f"{len(spec['raw'])} B",
+                                len(spec["raw"]),
+                                len(spec["records"]),
+                                len(spec["records"]),
+                                payload.get("description") or task.get("description") or "",
+                                json_dumps(dataset_metadata),
+                                now,
+                                dataset_id,
+                            ),
+                        ).fetchone()
+                    else:
+                        dataset = conn.execute(
+                            """
+                            INSERT INTO datasets
+                            (id, name, type, storage_type, source, task_id, source_task_id,
+                             size, size_bytes, count, record_count, description, metadata,
+                             tenant_id, project_id, owner_id, created_by, create_time,
+                             created_at, updated_at)
+                            VALUES (
+                                %s, %s, %s, %s, 'task', %s, %s,
+                                %s, %s, %s, %s, %s, %s,
+                                %s, %s, %s, %s, %s, %s, %s
+                            )
+                            RETURNING *
+                            """,
+                            (
+                                dataset_id,
+                                dataset_name,
+                                dataset_types[split_name],
+                                "minio" if spec["store_in_minio"] else "database",
+                                task_id,
+                                task_id,
+                                f"{len(spec['raw'])} B",
+                                len(spec["raw"]),
+                                len(spec["records"]),
+                                len(spec["records"]),
+                                payload.get("description") or task.get("description") or "",
+                                json_dumps(dataset_metadata),
+                                task.get("tenant_id"),
+                                task.get("project_id"),
+                                task.get("owner_id"),
+                                payload.get("created_by") or task.get("created_by"),
+                                now,
+                                now,
+                                now,
+                            ),
+                        ).fetchone()
+
+                    file_metadata = {
+                        **dataset_metadata,
+                        "file_split": split_name,
+                        "storage_backend": "minio" if spec["store_in_minio"] else "database",
+                    }
+                    version = {
+                        "id": spec["version_id"],
+                        "version_no": 1,
+                        "version": 1,
+                        "description": f"data process {split_name} publish",
+                        "checksum_sha256": spec["checksum"],
+                        "size_bytes": len(spec["raw"]),
+                        "record_count": len(spec["records"]),
+                        "created_at": now,
+                        "create_time": now,
+                        "source_task_id": task_id,
+                        "storage_object_id": storage_object_id,
+                    }
+                    conn.execute(
+                        """
+                        INSERT INTO dataset_files
+                        (id, dataset_id, name, storage_object_id, size, content,
+                         active_version_id, versions, create_time, current_version_id,
+                         size_bytes, record_count, file_format, checksum_sha256, version_no,
+                         source_task_id, tenant_id, project_id, created_by, metadata,
+                         created_at, updated_at)
+                        VALUES (%s, %s, %s, %s, %s, %s, %s, %s, %s, %s, %s, %s,
+                                %s, %s, 1, %s, %s, %s, %s, %s, %s, %s)
+                        """,
+                        (
+                            spec["file_id"],
+                            dataset_id,
+                            f"{base_dataset_name}.{split_name}.jsonl",
+                            storage_object_id,
+                            f"{len(spec['raw'])} B",
+                            spec["content"],
+                            spec["version_id"],
+                            json_dumps([version]),
+                            now,
+                            spec["version_id"],
+                            len(spec["raw"]),
+                            len(spec["records"]),
+                            "jsonl",
+                            spec["checksum"],
+                            task_id,
+                            task.get("tenant_id"),
+                            task.get("project_id"),
+                            payload.get("created_by") or task.get("created_by"),
+                            json_dumps(file_metadata),
+                            now,
+                            now,
+                        ),
+                    )
+                    conn.execute(
+                        """
+                        INSERT INTO dataset_file_versions
+                        (id, dataset_file_id, version_no, storage_object_id, content_preview,
+                         description, size_bytes, record_count, checksum_sha256,
+                         source_task_id, metadata, created_by, created_at)
+                        VALUES (%s, %s, 1, %s, %s, %s, %s, %s, %s, %s, %s, %s, %s)
+                        """,
+                        (
+                            spec["version_id"],
+                            spec["file_id"],
+                            storage_object_id,
+                            spec["content"][:2000],
+                            f"data process {split_name} publish",
+                            len(spec["raw"]),
+                            len(spec["records"]),
+                            spec["checksum"],
+                            task_id,
+                            json_dumps(file_metadata),
+                            payload.get("created_by") or task.get("created_by"),
+                            now,
+                        ),
+                    )
+                    for line_number, (source_row, record) in enumerate(
+                        spec["records"], start=1
+                    ):
+                        conn.execute(
+                            """
+                            INSERT INTO dataset_records
+                            (id, dataset_id, dataset_file_id, version_id, line_no, split,
+                             instruction, input, output, raw, status, source_task_id,
+                             source_result_id, preview_item_id, created_at)
+                            VALUES (%s, %s, %s, %s, %s, %s, %s, %s, %s, %s, %s,
+                                    %s, %s, %s, %s)
+                            """,
+                            (
+                                new_id("drec"),
+                                dataset_id,
+                                spec["file_id"],
+                                spec["version_id"],
+                                line_number,
+                                record["split"],
+                                record["instruction"],
+                                record["input"],
+                                record.get("output") or record.get("chosen") or "",
+                                json_dumps(
+                                    {
+                                        **record,
+                                        "source_task_id": task_id,
+                                        "source_result_id": source_row["id"],
+                                        "preview_item_id": source_row.get("preview_item_id"),
+                                    }
+                                ),
+                                source_row["status"],
+                                task_id,
+                                source_row["id"],
+                                source_row.get("preview_item_id"),
+                                now,
+                            ),
+                        )
+                    published_datasets.append(_decode_row(dataset) or {})
+
+            except psycopg.errors.UniqueViolation as exc:
+                raise ConflictError("dataset name already exists") from exc
+            train_dataset_id = dataset_ids.get("train")
+            if not train_dataset_id:
+                raise InvalidStateError("published split does not contain training data")
+            conn.execute(
+                """
+                UPDATE data_process_tasks
+                SET output_dataset_id=%s, updated_at=%s, updated_by=%s
+                WHERE id=%s
+                """,
+                (train_dataset_id, now, payload.get("created_by"), task_id),
+            )
+        train_dataset = next(
+            item
+            for item in published_datasets
+            if _json_value(item.get("metadata"), {}).get("dataset_split") == "train"
+        )
+        return {
+            "dataset": train_dataset,
+            "datasets": published_datasets,
+            "output_datasets": published_datasets,
+            "created": created_any,
+            "split_counts": split_counts,
+        }
+
+    @staticmethod
+    def _source_ids(
+        conn: psycopg.Connection[dict[str, Any]], task_id: str
+    ) -> list[dict[str, Any]]:
+        return conn.execute(
+            """
+            SELECT id FROM data_process_source_files
+            WHERE task_id=%s AND deleted_at IS NULL ORDER BY created_at, id
+            """,
+            (task_id,),
+        ).fetchall()

backend/app/modules/data_process/store/generation.py

@@ -0,0 +1,275 @@
+"""数据处理存储层 - 生成管理。"""
+
+from __future__ import annotations
+
+from typing import Any
+from collections.abc import Sequence
+
+import psycopg
+
+from .base import (
+    StoreBase,
+    utcnow,
+    new_id,
+    repeat_task_id,
+    json_dumps,
+    _json_value,
+    _decode_row,
+    _public_task,
+    _business_config,
+    _preview_config_value,
+    _preview_config_changed,
+    _preview_config_projection,
+    _normalized_preprocess_options,
+    _regeneration_marker,
+    _is_regeneration_prepared,
+    _task_output_type,
+    _task_reasoning_detail,
+    _reasoning_output_is_valid,
+    _dpo_fields_are_valid,
+    _source_storage_descriptor,
+    DataProcessStoreError,
+    NotFoundError,
+    ConflictError,
+    InvalidStateError,
+    EDITABLE_STATUSES,
+    ACTIVE_PREVIEW_STATUSES,
+    WORKFLOW_STEPS,
+    _REGENERATION_MARKER_KEY,
+    _REPEAT_SOURCE_TASK_KEY,
+    _REPEAT_REQUEST_KEY,
+)
+
+
+class GenerationMixin:
+    """生成管理 Mixin。"""
+
+    def _invalidate_results(
+        self,
+        conn: psycopg.Connection[dict[str, Any]],
+        task: dict[str, Any],
+        task_id: str,
+        now: str,
+    ) -> None:
+        if _is_regeneration_prepared(task):
+            conn.execute(
+                "UPDATE data_process_tasks SET updated_at=%s WHERE id=%s",
+                (now, task_id),
+            )
+            return
+        conn.execute("DELETE FROM data_process_results WHERE task_id=%s", (task_id,))
+        conn.execute(
+            """
+            UPDATE data_process_tasks
+            SET status='pending', progress=20, output_count=0, filtered_count=0,
+                duplicate_count=0, error_count=0, failure_reason=NULL,
+                generation_run_id=NULL, results_confirmed=FALSE, updated_at=%s
+            WHERE id=%s
+            """,
+            (now, task_id),
+        )
+
+    def start_generation(self, task_id: str, *, replace_existing: bool = True) -> dict[str, Any]:
+        if not replace_existing:
+            raise DataProcessStoreError("incremental generation is not supported")
+        with self.connect() as conn:
+            task = self._task_in_connection(conn, task_id, for_update=True)
+            regeneration_prepared = _is_regeneration_prepared(task)
+            if task.get("output_dataset_id") and not regeneration_prepared:
+                raise InvalidStateError("published task cannot be regenerated")
+            if task["status"] == "running":
+                raise ConflictError("data process task is already running")
+            if task.get("preview_status") in ACTIVE_PREVIEW_STATUSES:
+                raise ConflictError("preview is still running")
+            preview_count = conn.execute(
+                "SELECT COUNT(*) AS count FROM data_process_preview_items WHERE task_id=%s",
+                (task_id,),
+            ).fetchone()["count"]
+            if not preview_count:
+                raise InvalidStateError("preview must be built before generation")
+            conn.execute("DELETE FROM data_process_results WHERE task_id=%s", (task_id,))
+            now = utcnow()
+            generation_run_id = new_id("dprun")
+            next_config = dict(task.get("config") or {})
+            next_config.pop(_REGENERATION_MARKER_KEY, None)
+            row = conn.execute(
+                """
+                UPDATE data_process_tasks
+                SET config=%s, status='running', progress=30, failure_reason=NULL,
+                    started_at=%s, completed_at=NULL, output_dataset_id=NULL,
+                    output_count=0, filtered_count=0, duplicate_count=0, error_count=0,
+                    generation_run_id=%s, results_confirmed=FALSE,
+                    workflow_step='generate', updated_at=%s
+                WHERE id=%s
+                RETURNING *
+                """,
+                (json_dumps(next_config), now, generation_run_id, now, task_id),
+            ).fetchone()
+        return _decode_row(row) or {}
+
+    def stop_task(self, task_id: str) -> dict[str, Any]:
+        with self.connect() as conn:
+            task = self._task_in_connection(conn, task_id, for_update=True)
+            if task["status"] != "running":
+                raise InvalidStateError("only a running task can be stopped")
+            now = utcnow()
+            row = conn.execute(
+                """
+                UPDATE data_process_tasks
+                SET status='stopped', failure_reason=NULL, generation_run_id=NULL,
+                    updated_at=%s
+                WHERE id=%s RETURNING *
+                """,
+                (now, task_id),
+            ).fetchone()
+        return _decode_row(row) or {}
+
+    def generation_is_running(self, task_id: str, generation_run_id: str) -> bool:
+        with self.connect() as conn:
+            row = conn.execute(
+                """
+                SELECT status, generation_run_id
+                FROM data_process_tasks
+                WHERE id=%s AND deleted_at IS NULL
+                """,
+                (task_id,),
+            ).fetchone()
+        return bool(
+            row
+            and row.get("status") == "running"
+            and row.get("generation_run_id") == generation_run_id
+        )
+
+    def update_generation_progress(
+        self,
+        task_id: str,
+        generation_run_id: str,
+        processed_count: int,
+        total_count: int,
+    ) -> bool:
+        ratio = processed_count / max(1, total_count)
+        progress = min(95.0, 30.0 + ratio * 65.0)
+        with self.connect() as conn:
+            row = conn.execute(
+                """
+                UPDATE data_process_tasks
+                SET progress=%s, updated_at=%s
+                WHERE id=%s AND status='running' AND generation_run_id=%s
+                RETURNING id
+                """,
+                (progress, utcnow(), task_id, generation_run_id),
+            ).fetchone()
+        return row is not None
+
+    def complete_generation(
+        self,
+        task_id: str,
+        results: Sequence[dict[str, Any]],
+        *,
+        generation_run_id: str,
+        filtered_count: int = 0,
+        duplicate_count: int = 0,
+        error_count: int = 0,
+    ) -> dict[str, Any]:
+        now = utcnow()
+        with self.connect() as conn:
+            task = self._task_in_connection(conn, task_id, for_update=True)
+            if (
+                task["status"] != "running"
+                or task.get("generation_run_id") != generation_run_id
+            ):
+                return task
+            conn.execute("DELETE FROM data_process_results WHERE task_id=%s", (task_id,))
+            for result in results:
+                conn.execute(
+                    """
+                    INSERT INTO data_process_results
+                    (id, task_id, preview_item_id, instruction, input, output,
+                     chosen, rejected, original_instruction, original_input,
+                     original_output, original_chosen, original_rejected, status, error,
+                     split, quality_score, created_at, updated_at)
+                    VALUES (%s, %s, %s, %s, %s, %s, %s, %s, %s, %s, %s, %s,
+                            %s, %s, %s, %s, %s, %s, %s)
+                    """,
+                    (
+                        result.get("id") or new_id("dpr"),
+                        task_id,
+                        result.get("preview_item_id"),
+                        result.get("instruction") or "",
+                        result.get("input") or "",
+                        result.get("output") or "",
+                        result.get("chosen") or "",
+                        result.get("rejected") or "",
+                        result.get("original_instruction", result.get("instruction") or ""),
+                        result.get("original_input", result.get("input") or ""),
+                        result.get("original_output", result.get("output") or ""),
+                        result.get("original_chosen", result.get("chosen") or ""),
+                        result.get("original_rejected", result.get("rejected") or ""),
+                        result.get("status") or "valid",
+                        result.get("error"),
+                        result.get("split"),
+                        json_dumps(result.get("quality_score") or {}),
+                        now,
+                        now,
+                    ),
+                )
+            row = conn.execute(
+                """
+                UPDATE data_process_tasks
+                SET status='completed', progress=100, output_count=%s, filtered_count=%s,
+                    duplicate_count=%s, error_count=%s, failure_reason=NULL,
+                    completed_at=%s, generation_run_id=NULL, results_confirmed=FALSE,
+                    updated_at=%s
+                WHERE id=%s AND generation_run_id=%s RETURNING *
+                """,
+                (
+                    len(results),
+                    filtered_count,
+                    duplicate_count,
+                    error_count,
+                    now,
+                    now,
+                    task_id,
+                    generation_run_id,
+                ),
+            ).fetchone()
+        return _decode_row(row) or {}
+
+    def mark_failed(
+        self, task_id: str, reason: str, *, generation_run_id: str
+    ) -> dict[str, Any]:
+        with self.connect() as conn:
+            task = self._task_in_connection(conn, task_id, for_update=True)
+            if (
+                task["status"] != "running"
+                or task.get("generation_run_id") != generation_run_id
+            ):
+                return task
+            now = utcnow()
+            row = conn.execute(
+                """
+                UPDATE data_process_tasks
+                SET status='failed', failure_reason=%s, completed_at=%s,
+                    generation_run_id=NULL, updated_at=%s
+                WHERE id=%s AND generation_run_id=%s RETURNING *
+                """,
+                (reason[:4000], now, now, task_id, generation_run_id),
+            ).fetchone()
+        return _decode_row(row) or {}
+
+    def progress(self, task_id: str) -> dict[str, Any]:
+        task = self.get_task(task_id)
+        return {
+            "task_id": task["id"],
+            "status": task["status"],
+            "progress": float(task.get("progress") or 0),
+            "input_count": int(task.get("input_count") or 0),
+            "output_count": int(task.get("output_count") or 0),
+            "filtered_count": int(task.get("filtered_count") or 0),
+            "duplicate_count": int(task.get("duplicate_count") or 0),
+            "error_count": int(task.get("error_count") or 0),
+            "failure_reason": task.get("failure_reason"),
+            "results_confirmed": bool(task.get("results_confirmed")),
+            "started_at": task.get("started_at"),
+            "completed_at": task.get("completed_at"),
+        }

backend/app/modules/data_process/store/preview.py

@@ -0,0 +1,539 @@
+"""数据处理存储层 - 预览管理。"""
+
+from __future__ import annotations
+
+from typing import Any
+from collections.abc import Sequence
+
+import psycopg
+
+from .base import (
+    StoreBase,
+    utcnow,
+    new_id,
+    repeat_task_id,
+    json_dumps,
+    _json_value,
+    _decode_row,
+    _public_task,
+    _business_config,
+    _preview_config_value,
+    _preview_config_changed,
+    _preview_config_projection,
+    _normalized_preprocess_options,
+    _regeneration_marker,
+    _is_regeneration_prepared,
+    _task_output_type,
+    _task_reasoning_detail,
+    _reasoning_output_is_valid,
+    _dpo_fields_are_valid,
+    _source_storage_descriptor,
+    _serialize_value,
+    NotFoundError,
+    ConflictError,
+    InvalidStateError,
+    EDITABLE_STATUSES,
+    ACTIVE_PREVIEW_STATUSES,
+    WORKFLOW_STEPS,
+    _REGENERATION_MARKER_KEY,
+    _REPEAT_SOURCE_TASK_KEY,
+    _REPEAT_REQUEST_KEY,
+)
+from ..algorithms import estimate_token_count  # noqa: E402
+
+
+class PreviewMixin:
+    """预览管理 Mixin。"""
+
+    def replace_preview_items(
+        self,
+        task_id: str,
+        items: Sequence[dict[str, Any]],
+        *,
+        source_file_ids: Sequence[str] | None = None,
+        preview_run_id: str | None = None,
+    ) -> list[dict[str, Any]]:
+        selected_ids = (
+            list(dict.fromkeys(str(file_id) for file_id in source_file_ids))
+            if source_file_ids is not None
+            else None
+        )
+        if selected_ids is not None:
+            if not selected_ids or any(not file_id for file_id in selected_ids):
+                raise ValueError("source_file_ids must contain non-empty ids")
+            selected_set = set(selected_ids)
+            unexpected = {
+                str(item.get("source_file_id") or "")
+                for item in items
+                if str(item.get("source_file_id") or "") not in selected_set
+            }
+            if unexpected:
+                raise ValueError("preview items contain an unselected source file")
+        preview_file_count = len(selected_ids) if selected_ids is not None else len(
+            {str(item.get("source_file_id") or "") for item in items}
+        )
+        is_direct_build = preview_run_id is None
+
+        now = utcnow()
+        with self.connect() as conn:
+            task = self._task_in_connection(conn, task_id, for_update=True)
+            if is_direct_build:
+                self._ensure_editable(task)
+            elif (
+                task.get("preview_run_id") != preview_run_id
+                or task.get("preview_status") != "running"
+            ):
+                raise InvalidStateError("preview run is no longer active")
+            regeneration_prepared = _is_regeneration_prepared(task)
+            if not regeneration_prepared:
+                conn.execute("DELETE FROM data_process_results WHERE task_id=%s", (task_id,))
+            if selected_ids is None:
+                conn.execute(
+                    "DELETE FROM data_process_preview_items WHERE task_id=%s", (task_id,)
+                )
+            else:
+                rows = conn.execute(
+                    """
+                    SELECT id FROM data_process_source_files
+                    WHERE task_id=%s AND deleted_at IS NULL AND id=ANY(%s)
+                    """,
+                    (task_id, selected_ids),
+                ).fetchall()
+                found = {str(row["id"]) for row in rows}
+                missing = set(selected_ids) - found
+                if missing:
+                    raise NotFoundError(
+                        f"source files not found: {', '.join(sorted(missing))}"
+                    )
+                conn.execute(
+                    """
+                    DELETE FROM data_process_preview_items
+                    WHERE task_id=%s AND source_file_id=ANY(%s)
+                    """,
+                    (task_id, selected_ids),
+                )
+            created: list[dict[str, Any]] = []
+            for item in items:
+                row = conn.execute(
+                    """
+                    INSERT INTO data_process_preview_items
+                    (id, task_id, source_file_id, original_content, edited_content,
+                     source_start, source_end, source_start_line, source_end_line,
+                     token_count, status, quality_score, created_at, updated_at)
+                    VALUES (%s, %s, %s, %s, %s, %s, %s, %s, %s, %s, %s, %s, %s, %s)
+                    RETURNING *
+                    """,
+                    (
+                        item.get("id") or new_id("dpp"),
+                        task_id,
+                        item.get("source_file_id"),
+                        item.get("original_content") or "",
+                        item.get("edited_content", item.get("original_content") or ""),
+                        item.get("source_start"),
+                        item.get("source_end"),
+                        item.get("source_start_line"),
+                        item.get("source_end_line"),
+                        max(0, int(item.get("token_count") or 0)),
+                        item.get("status") or "original",
+                        json_dumps(item.get("quality_score") or {}),
+                        now,
+                        now,
+                    ),
+                ).fetchone()
+                created.append(_decode_row(row) or {})
+            if regeneration_prepared:
+                if is_direct_build:
+                    conn.execute(
+                        """
+                        UPDATE data_process_tasks
+                        SET workflow_step='preview', preview_status='completed',
+                            preview_progress=100, preview_run_id=NULL,
+                            preview_failure_reason=NULL, preview_total_files=%s,
+                            preview_completed_files=%s, updated_at=%s
+                        WHERE id=%s
+                        """,
+                        (preview_file_count, preview_file_count, now, task_id),
+                    )
+                else:
+                    conn.execute(
+                        "UPDATE data_process_tasks SET updated_at=%s WHERE id=%s",
+                        (now, task_id),
+                    )
+            else:
+                conn.execute(
+                    """
+                    UPDATE data_process_tasks
+                    SET status='pending', progress=20, output_count=0, filtered_count=0,
+                        duplicate_count=0, error_count=0, failure_reason=NULL,
+                        results_confirmed=FALSE,
+                        workflow_step=CASE WHEN %s THEN 'preview' ELSE workflow_step END,
+                        preview_status=CASE WHEN %s THEN 'completed' ELSE preview_status END,
+                        preview_progress=CASE WHEN %s THEN 100 ELSE preview_progress END,
+                        preview_run_id=CASE WHEN %s THEN NULL ELSE preview_run_id END,
+                        preview_failure_reason=CASE WHEN %s THEN NULL ELSE preview_failure_reason END,
+                        preview_total_files=CASE WHEN %s THEN %s ELSE preview_total_files END,
+                        preview_completed_files=CASE WHEN %s THEN %s ELSE preview_completed_files END,
+                        updated_at=%s
+                    WHERE id=%s
+                    """,
+                    (
+                        is_direct_build,
+                        is_direct_build,
+                        is_direct_build,
+                        is_direct_build,
+                        is_direct_build,
+                        is_direct_build,
+                        preview_file_count,
+                        is_direct_build,
+                        preview_file_count,
+                        now,
+                        task_id,
+                    ),
+                )
+        return created
+
+    def start_preview(
+        self,
+        task_id: str,
+        *,
+        source_file_ids: Sequence[str] | None = None,
+    ) -> tuple[dict[str, Any], list[str]]:
+        """创建一轮持久化切分任务，并返回本轮固定的源文件集合。"""
+
+        requested_ids = (
+            list(dict.fromkeys(str(file_id) for file_id in source_file_ids))
+            if source_file_ids is not None
+            else None
+        )
+        if requested_ids is not None and (
+            not requested_ids or any(not file_id for file_id in requested_ids)
+        ):
+            raise ValueError("source_file_ids must contain non-empty ids")
+
+        with self.connect() as conn:
+            task = self._task_in_connection(conn, task_id, for_update=True)
+            self._ensure_editable(task)
+            if requested_ids is None:
+                rows = conn.execute(
+                    """
+                    SELECT id FROM data_process_source_files
+                    WHERE task_id=%s AND deleted_at IS NULL
+                    ORDER BY created_at, id
+                    """,
+                    (task_id,),
+                ).fetchall()
+            else:
+                rows = conn.execute(
+                    """
+                    SELECT id FROM data_process_source_files
+                    WHERE task_id=%s AND deleted_at IS NULL AND id=ANY(%s)
+                    ORDER BY created_at, id
+                    """,
+                    (task_id, requested_ids),
+                ).fetchall()
+            selected_ids = [str(row["id"]) for row in rows]
+            if not selected_ids:
+                raise InvalidStateError("at least one source file is required")
+            if requested_ids is not None:
+                missing = set(requested_ids) - set(selected_ids)
+                if missing:
+                    raise NotFoundError(
+                        f"source files not found: {', '.join(sorted(missing))}"
+                    )
+
+            regeneration_prepared = _is_regeneration_prepared(task)
+            if not regeneration_prepared:
+                conn.execute("DELETE FROM data_process_results WHERE task_id=%s", (task_id,))
+            preview_run_id = new_id("dpprun")
+            now = utcnow()
+            row = conn.execute(
+                """
+                UPDATE data_process_tasks
+                SET status=CASE WHEN %s THEN status ELSE 'pending' END,
+                    progress=CASE WHEN %s THEN progress ELSE 0 END,
+                    output_count=CASE WHEN %s THEN output_count ELSE 0 END,
+                    filtered_count=CASE WHEN %s THEN filtered_count ELSE 0 END,
+                    duplicate_count=CASE WHEN %s THEN duplicate_count ELSE 0 END,
+                    error_count=CASE WHEN %s THEN error_count ELSE 0 END,
+                    failure_reason=CASE WHEN %s THEN failure_reason ELSE NULL END,
+                    results_confirmed=CASE WHEN %s THEN results_confirmed ELSE FALSE END,
+                    workflow_step='upload', preview_status='queued', preview_progress=0,
+                    preview_run_id=%s, preview_failure_reason=NULL,
+                    preview_total_files=%s, preview_completed_files=0,
+                    updated_at=%s
+                WHERE id=%s AND deleted_at IS NULL
+                RETURNING *
+                """,
+                (
+                    regeneration_prepared,
+                    regeneration_prepared,
+                    regeneration_prepared,
+                    regeneration_prepared,
+                    regeneration_prepared,
+                    regeneration_prepared,
+                    regeneration_prepared,
+                    regeneration_prepared,
+                    preview_run_id,
+                    len(selected_ids),
+                    now,
+                    task_id,
+                ),
+            ).fetchone()
+        return _public_task(_decode_row(row)) or {}, selected_ids
+
+    def mark_preview_running(self, task_id: str, preview_run_id: str) -> bool:
+        with self.connect() as conn:
+            row = conn.execute(
+                """
+                UPDATE data_process_tasks
+                SET preview_status='running', updated_at=%s
+                WHERE id=%s AND deleted_at IS NULL
+                  AND preview_status='queued' AND preview_run_id=%s
+                RETURNING id
+                """,
+                (utcnow(), task_id, preview_run_id),
+            ).fetchone()
+        return row is not None
+
+    def preview_is_running(self, task_id: str, preview_run_id: str) -> bool:
+        with self.connect() as conn:
+            row = conn.execute(
+                """
+                SELECT preview_status, preview_run_id
+                FROM data_process_tasks
+                WHERE id=%s AND deleted_at IS NULL
+                """,
+                (task_id,),
+            ).fetchone()
+        return bool(
+            row
+            and row.get("preview_status") in ACTIVE_PREVIEW_STATUSES
+            and row.get("preview_run_id") == preview_run_id
+        )
+
+    def update_preview_progress(
+        self,
+        task_id: str,
+        preview_run_id: str,
+        completed_files: int,
+        total_files: int,
+    ) -> bool:
+        total = max(1, total_files)
+        completed = min(max(0, completed_files), total)
+        progress = completed / total * 100
+        with self.connect() as conn:
+            row = conn.execute(
+                """
+                UPDATE data_process_tasks
+                SET preview_progress=%s, preview_completed_files=%s, updated_at=%s
+                WHERE id=%s AND deleted_at IS NULL
+                  AND preview_status='running' AND preview_run_id=%s
+                RETURNING id
+                """,
+                (progress, completed, utcnow(), task_id, preview_run_id),
+            ).fetchone()
+        return row is not None
+
+    def complete_preview(self, task_id: str, preview_run_id: str) -> bool:
+        with self.connect() as conn:
+            row = conn.execute(
+                """
+                UPDATE data_process_tasks
+                SET workflow_step='preview', preview_status='completed',
+                    preview_progress=100, preview_run_id=NULL,
+                    preview_failure_reason=NULL,
+                    preview_completed_files=preview_total_files, updated_at=%s
+                WHERE id=%s AND deleted_at IS NULL
+                  AND preview_status='running' AND preview_run_id=%s
+                RETURNING id
+                """,
+                (utcnow(), task_id, preview_run_id),
+            ).fetchone()
+        return row is not None
+
+    def mark_preview_failed(
+        self,
+        task_id: str,
+        reason: str,
+        *,
+        preview_run_id: str,
+    ) -> bool:
+        with self.connect() as conn:
+            row = conn.execute(
+                """
+                UPDATE data_process_tasks
+                SET preview_status='failed', preview_run_id=NULL,
+                    preview_failure_reason=%s, updated_at=%s
+                WHERE id=%s AND deleted_at IS NULL
+                  AND preview_status IN ('queued', 'running') AND preview_run_id=%s
+                RETURNING id
+                """,
+                (reason[:4000], utcnow(), task_id, preview_run_id),
+            ).fetchone()
+        return row is not None
+
+    def preview_progress(self, task_id: str) -> dict[str, Any]:
+        task = self.get_task(task_id)
+        return {
+            "task_id": task["id"],
+            "workflow_step": task.get("workflow_step") or "create",
+            "preview_status": task.get("preview_status") or "idle",
+            "preview_progress": float(task.get("preview_progress") or 0),
+            "preview_run_id": task.get("preview_run_id"),
+            "preview_failure_reason": task.get("preview_failure_reason"),
+            "preview_total_files": int(task.get("preview_total_files") or 0),
+            "preview_completed_files": int(task.get("preview_completed_files") or 0),
+        }
+
+    def list_preview_items(
+        self,
+        task_id: str,
+        *,
+        source_file_id: str | None = None,
+        page: int = 1,
+        page_size: int = 200,
+        keyword: str | None = None,
+    ) -> dict[str, Any]:
+        self.get_task(task_id)
+        clauses = ["task_id=%s"]
+        params: list[Any] = [task_id]
+        if source_file_id:
+            clauses.append("source_file_id=%s")
+            params.append(source_file_id)
+        if keyword:
+            clauses.append("(original_content ILIKE %s OR edited_content ILIKE %s)")
+            pattern = f"%{keyword.strip()}%"
+            params.extend([pattern, pattern])
+        where = " AND ".join(clauses)
+        with self.connect() as conn:
+            total = conn.execute(
+                f"SELECT COUNT(*) AS count FROM data_process_preview_items WHERE {where}", params
+            ).fetchone()["count"]
+            rows = conn.execute(
+                f"""
+                SELECT * FROM data_process_preview_items
+                WHERE {where}
+                ORDER BY source_file_id NULLS LAST, source_start NULLS LAST, created_at, id
+                LIMIT %s OFFSET %s
+                """,
+                [*params, page_size, (page - 1) * page_size],
+            ).fetchall()
+        return {
+            "items": [_decode_row(row) for row in rows],
+            "total": int(total),
+            "page": page,
+            "page_size": page_size,
+        }
+
+    def get_preview_item(self, task_id: str, preview_id: str) -> dict[str, Any]:
+        with self.connect() as conn:
+            row = conn.execute(
+                "SELECT * FROM data_process_preview_items WHERE id=%s AND task_id=%s",
+                (preview_id, task_id),
+            ).fetchone()
+        if not row:
+            raise NotFoundError("preview item not found")
+        return _decode_row(row) or {}
+
+    def create_preview_item(self, task_id: str, item: dict[str, Any]) -> dict[str, Any]:
+        now = utcnow()
+        with self.connect() as conn:
+            task = self._task_in_connection(conn, task_id, for_update=True)
+            self._ensure_editable(task)
+            if item.get("source_file_id"):
+                source = conn.execute(
+                    """
+                    SELECT id FROM data_process_source_files
+                    WHERE id=%s AND task_id=%s AND deleted_at IS NULL
+                    """,
+                    (item["source_file_id"], task_id),
+                ).fetchone()
+                if not source:
+                    raise NotFoundError("source file not found")
+            row = conn.execute(
+                """
+                INSERT INTO data_process_preview_items
+                (id, task_id, source_file_id, original_content, edited_content,
+                 source_start, source_end, source_start_line, source_end_line,
+                 token_count, status, quality_score, created_at, updated_at)
+                VALUES (%s, %s, %s, %s, %s, %s, %s, %s, %s, %s, %s, %s, %s, %s)
+                RETURNING *
+                """,
+                (
+                    new_id("dpp"),
+                    task_id,
+                    item.get("source_file_id"),
+                    item.get("original_content") or "",
+                    item.get("edited_content") or "",
+                    item.get("source_start"),
+                    item.get("source_end"),
+                    item.get("source_start_line"),
+                    item.get("source_end_line"),
+                    max(0, int(item.get("token_count") or 0)),
+                    item.get("status") or "manual",
+                    json_dumps(item.get("quality_score") or {}),
+                    now,
+                    now,
+                ),
+            ).fetchone()
+            self._invalidate_results(conn, task, task_id, now)
+        return _decode_row(row) or {}
+
+    def update_preview_item(
+        self, task_id: str, preview_id: str, payload: dict[str, Any]
+    ) -> dict[str, Any]:
+        with self.connect() as conn:
+            task = self._task_in_connection(conn, task_id, for_update=True)
+            self._ensure_editable(task)
+            existing = conn.execute(
+                "SELECT * FROM data_process_preview_items WHERE id=%s AND task_id=%s",
+                (preview_id, task_id),
+            ).fetchone()
+            if not existing:
+                raise NotFoundError("preview item not found")
+            expected_updated_at = payload.get("expected_updated_at")
+            current_updated_at = _serialize_value(existing.get("updated_at"))
+            if expected_updated_at and expected_updated_at != current_updated_at:
+                raise ConflictError("preview item was modified by another request")
+            edited = payload["edited_content"]
+            status = payload.get("status")
+            if not status:
+                if not edited.strip():
+                    status = "invalid"
+                elif edited == existing["original_content"]:
+                    status = "original"
+                else:
+                    status = "modified"
+            now = utcnow()
+            row = conn.execute(
+                """
+                UPDATE data_process_preview_items
+                SET edited_content=%s, token_count=%s, status=%s, quality_score=%s,
+                    updated_at=%s
+                WHERE id=%s AND task_id=%s
+                RETURNING *
+                """,
+                (
+                    edited,
+                    estimate_token_count(edited),
+                    status,
+                    json_dumps(payload.get("quality_score") or {}),
+                    now,
+                    preview_id,
+                    task_id,
+                ),
+            ).fetchone()
+            self._invalidate_results(conn, task, task_id, now)
+        return _decode_row(row) or {}
+
+    def delete_preview_item(self, task_id: str, preview_id: str) -> None:
+        with self.connect() as conn:
+            task = self._task_in_connection(conn, task_id, for_update=True)
+            self._ensure_editable(task)
+            row = conn.execute(
+                "DELETE FROM data_process_preview_items WHERE id=%s AND task_id=%s RETURNING id",
+                (preview_id, task_id),
+            ).fetchone()
+            if not row:
+                raise NotFoundError("preview item not found")
+            self._invalidate_results(conn, task, task_id, utcnow())

backend/app/modules/data_process/store/results.py

@@ -0,0 +1,324 @@
+"""数据处理存储层 - 结果管理。"""
+
+from __future__ import annotations
+
+from typing import Any
+from collections.abc import Sequence
+
+import psycopg
+
+from .base import (
+    StoreBase,
+    utcnow,
+    new_id,
+    repeat_task_id,
+    json_dumps,
+    _json_value,
+    _decode_row,
+    _public_task,
+    _business_config,
+    _preview_config_value,
+    _preview_config_changed,
+    _preview_config_projection,
+    _normalized_preprocess_options,
+    _regeneration_marker,
+    _is_regeneration_prepared,
+    _task_output_type,
+    _task_reasoning_detail,
+    _reasoning_output_is_valid,
+    _dpo_fields_are_valid,
+    _source_storage_descriptor,
+    _serialize_value,
+    DataProcessStoreError,
+    NotFoundError,
+    ConflictError,
+    InvalidStateError,
+    EDITABLE_STATUSES,
+    ACTIVE_PREVIEW_STATUSES,
+    WORKFLOW_STEPS,
+    _REGENERATION_MARKER_KEY,
+    _REPEAT_SOURCE_TASK_KEY,
+    _REPEAT_REQUEST_KEY,
+)
+
+
+class ResultsMixin:
+    """结果管理 Mixin。"""
+
+    def confirm_results(self, task_id: str) -> dict[str, Any]:
+        """确认第六步结果，确认前再次校验所有生成记录。"""
+
+        with self.connect() as conn:
+            task = self._task_in_connection(conn, task_id, for_update=True)
+            if task["status"] != "completed":
+                raise InvalidStateError("only a completed task can confirm results")
+            if task.get("workflow_step") != "results":
+                raise InvalidStateError("workflow must be on results before confirmation")
+            if task.get("results_confirmed"):
+                return task
+
+            rows = conn.execute(
+                """
+                SELECT status, instruction, output, chosen, rejected
+                FROM data_process_results
+                WHERE task_id=%s
+                """,
+                (task_id,),
+            ).fetchall()
+            if not rows:
+                raise InvalidStateError("task has no results to confirm")
+            invalid_count = sum(
+                1
+                for row in rows
+                if row["status"] == "invalid"
+                or not str(row.get("instruction") or "").strip()
+                or not str(row.get("output") or "").strip()
+                or (
+                    _task_output_type(task) == "reasoning"
+                    and not _reasoning_output_is_valid(row.get("output"))
+                )
+                or (
+                    _task_output_type(task) == "dpo"
+                    and not _dpo_fields_are_valid(row)
+                )
+            )
+            if invalid_count:
+                raise InvalidStateError(
+                    f"task contains {invalid_count} invalid results"
+                )
+
+            row = conn.execute(
+                """
+                UPDATE data_process_tasks
+                SET results_confirmed=TRUE, updated_at=%s
+                WHERE id=%s RETURNING *
+                """,
+                (utcnow(), task_id),
+            ).fetchone()
+        return _decode_row(row) or {}
+
+    def list_results(
+        self,
+        task_id: str,
+        *,
+        page: int = 1,
+        page_size: int = 100,
+        status: str | None = None,
+        split: str | None = None,
+        keyword: str | None = None,
+    ) -> dict[str, Any]:
+        self.get_task(task_id)
+        clauses = ["task_id=%s"]
+        params: list[Any] = [task_id]
+        if status:
+            clauses.append("status=%s")
+            params.append(status)
+        if split:
+            clauses.append("split=%s")
+            params.append(split)
+        if keyword:
+            clauses.append("(instruction ILIKE %s OR input ILIKE %s OR output ILIKE %s)")
+            pattern = f"%{keyword.strip()}%"
+            params.extend([pattern, pattern, pattern])
+        where = " AND ".join(clauses)
+        with self.connect() as conn:
+            total = conn.execute(
+                f"SELECT COUNT(*) AS count FROM data_process_results WHERE {where}", params
+            ).fetchone()["count"]
+            rows = conn.execute(
+                f"""
+                SELECT * FROM data_process_results WHERE {where}
+                ORDER BY created_at, id LIMIT %s OFFSET %s
+                """,
+                [*params, page_size, (page - 1) * page_size],
+            ).fetchall()
+        return {
+            "items": [_decode_row(row) for row in rows],
+            "total": int(total),
+            "page": page,
+            "page_size": page_size,
+        }
+
+    def get_result(self, task_id: str, result_id: str) -> dict[str, Any]:
+        with self.connect() as conn:
+            row = conn.execute(
+                "SELECT * FROM data_process_results WHERE id=%s AND task_id=%s",
+                (result_id, task_id),
+            ).fetchone()
+        if not row:
+            raise NotFoundError("data process result not found")
+        return _decode_row(row) or {}
+
+    def update_result(
+        self, task_id: str, result_id: str, payload: dict[str, Any]
+    ) -> dict[str, Any]:
+        allowed = {
+            "instruction", "input", "output", "chosen", "rejected", "quality_score"
+        }
+        values = {key: value for key, value in payload.items() if key in allowed}
+        if "quality_score" in values:
+            values["quality_score"] = json_dumps(values["quality_score"])
+        if not values:
+            raise DataProcessStoreError("no result fields supplied")
+        with self.connect() as conn:
+            task = self._task_in_connection(conn, task_id, for_update=True)
+            if task["status"] == "running":
+                raise InvalidStateError("results cannot be edited while generation is running")
+            if task.get("output_dataset_id"):
+                raise InvalidStateError("published results cannot be edited")
+            current = conn.execute(
+                "SELECT * FROM data_process_results WHERE id=%s AND task_id=%s",
+                (result_id, task_id),
+            ).fetchone()
+            if not current:
+                raise NotFoundError("data process result not found")
+            expected_updated_at = payload.get("expected_updated_at")
+            current_updated_at = _serialize_value(current.get("updated_at"))
+            if expected_updated_at and expected_updated_at != current_updated_at:
+                raise ConflictError("data process result was modified by another request")
+            output_type = _task_output_type(task)
+            if output_type == "dpo" and "chosen" in values:
+                values["output"] = values["chosen"]
+            merged = {**current, **values}
+            quality = payload.get("quality_score") or {}
+            instruction_valid = bool(str(merged.get("instruction") or "").strip())
+            output_valid = bool(str(merged.get("output") or "").strip())
+            reasoning_valid = (
+                output_type != "reasoning"
+                or _reasoning_output_is_valid(merged.get("output"))
+            )
+            dpo_valid = output_type != "dpo" or _dpo_fields_are_valid(merged)
+            hard_valid = instruction_valid and output_valid and reasoning_valid and dpo_valid
+            quality_valid = bool(quality.get("is_valid", hard_valid))
+            changed = any(
+                str(merged.get(field) or "")
+                != str(merged.get(f"original_{field}") or "")
+                for field in (
+                    ("instruction", "input", "chosen", "rejected")
+                    if output_type == "dpo"
+                    else ("instruction", "input", "output")
+                )
+            )
+            status = "invalid" if not hard_valid or not quality_valid else (
+                "modified" if changed else "valid"
+            )
+            values["status"] = status
+            flags = quality.get("flags") if isinstance(quality, dict) else None
+            format_error = (
+                "思维链输出必须包含非空的 <think>...</think> 推理过程和最终答案"
+                if instruction_valid and output_valid and not reasoning_valid
+                else "DPO 输出必须包含不同的非空 Chosen 和 Rejected 回答"
+                if instruction_valid and not dpo_valid
+                else "Instruction 和 Output 不能为空"
+                if not instruction_valid or not output_valid
+                else None
+            )
+            values["error"] = ", ".join(str(flag) for flag in flags or []) or (
+                format_error
+                or ("quality validation failed" if status == "invalid" else None)
+            )
+            values["updated_at"] = utcnow()
+            assignments = ", ".join(f"{key}=%s" for key in values)
+            row = conn.execute(
+                f"""UPDATE data_process_results SET {assignments}
+                    WHERE id=%s AND task_id=%s RETURNING *""",
+                [*values.values(), result_id, task_id],
+            ).fetchone()
+            conn.execute(
+                """
+                UPDATE data_process_tasks
+                SET error_count=(
+                    SELECT COUNT(*) FROM data_process_results
+                    WHERE task_id=%s AND status='invalid'
+                ), updated_at=%s
+                WHERE id=%s
+                """,
+                (task_id, utcnow(), task_id),
+            )
+        return _decode_row(row) or {}
+
+    def replace_generated_result(
+        self,
+        task_id: str,
+        result_id: str,
+        replacement: dict[str, Any],
+        *,
+        expected_updated_at: str,
+    ) -> dict[str, Any]:
+        """用新模型结果原位替换失败项，并将新内容设为恢复基线。"""
+
+        with self.connect() as conn:
+            task = self._task_in_connection(conn, task_id, for_update=True)
+            if task["status"] != "completed" or task.get("workflow_step") != "results":
+                raise InvalidStateError("task is not editing generation results")
+            if task.get("results_confirmed"):
+                raise InvalidStateError("confirmed results cannot be regenerated")
+            if task.get("output_dataset_id"):
+                raise InvalidStateError("published results cannot be regenerated")
+
+            current = conn.execute(
+                """SELECT * FROM data_process_results
+                   WHERE id=%s AND task_id=%s FOR UPDATE""",
+                (result_id, task_id),
+            ).fetchone()
+            if not current:
+                raise NotFoundError("data process result not found")
+            if current.get("status") != "invalid":
+                raise InvalidStateError("only an invalid result can be regenerated")
+            current_updated_at = _serialize_value(current.get("updated_at"))
+            if expected_updated_at != current_updated_at:
+                raise ConflictError("data process result was modified by another request")
+
+            instruction = str(replacement.get("instruction") or "").strip()
+            input_text = str(replacement.get("input") or "").strip()
+            output = str(replacement.get("output") or "").strip()
+            chosen = str(replacement.get("chosen") or "").strip()
+            rejected = str(replacement.get("rejected") or "").strip()
+            quality_score = replacement.get("quality_score") or {}
+            if not instruction or not output or not bool(quality_score.get("is_valid")):
+                raise InvalidStateError("regenerated result did not pass quality validation")
+            if _task_output_type(task) == "reasoning" and not _reasoning_output_is_valid(output):
+                raise InvalidStateError("regenerated reasoning result has an invalid output format")
+            if _task_output_type(task) == "dpo" and not _dpo_fields_are_valid(replacement):
+                raise InvalidStateError("regenerated DPO result has invalid preference fields")
+
+            now = utcnow()
+            row = conn.execute(
+                """
+                UPDATE data_process_results
+                SET instruction=%s, input=%s, output=%s, chosen=%s, rejected=%s,
+                    original_instruction=%s, original_input=%s, original_output=%s,
+                    original_chosen=%s, original_rejected=%s,
+                    status='valid', error=NULL, quality_score=%s, updated_at=%s
+                WHERE id=%s AND task_id=%s
+                RETURNING *
+                """,
+                (
+                    instruction,
+                    input_text,
+                    output,
+                    chosen,
+                    rejected,
+                    instruction,
+                    input_text,
+                    output,
+                    chosen,
+                    rejected,
+                    json_dumps(quality_score),
+                    now,
+                    result_id,
+                    task_id,
+                ),
+            ).fetchone()
+            conn.execute(
+                """
+                UPDATE data_process_tasks
+                SET error_count=(
+                    SELECT COUNT(*) FROM data_process_results
+                    WHERE task_id=%s AND status='invalid'
+                ), updated_at=%s
+                WHERE id=%s
+                """,
+                (task_id, now, task_id),
+            )
+        return _decode_row(row) or {}

backend/app/modules/data_process/store/source_files.py

@@ -0,0 +1,331 @@
+"""数据处理存储层 - 源文件管理。"""
+
+from __future__ import annotations
+
+from typing import Any
+from collections.abc import Sequence
+
+import psycopg
+
+from .base import (
+    StoreBase,
+    utcnow,
+    new_id,
+    repeat_task_id,
+    json_dumps,
+    _json_value,
+    _decode_row,
+    _public_task,
+    _business_config,
+    _preview_config_value,
+    _preview_config_changed,
+    _preview_config_projection,
+    _normalized_preprocess_options,
+    _regeneration_marker,
+    _is_regeneration_prepared,
+    _task_output_type,
+    _task_reasoning_detail,
+    _reasoning_output_is_valid,
+    _dpo_fields_are_valid,
+    _source_storage_descriptor,
+    DataProcessStoreError,
+    NotFoundError,
+    ConflictError,
+    InvalidStateError,
+    EDITABLE_STATUSES,
+    ACTIVE_PREVIEW_STATUSES,
+    WORKFLOW_STEPS,
+    _REGENERATION_MARKER_KEY,
+    _REPEAT_SOURCE_TASK_KEY,
+    _REPEAT_REQUEST_KEY,
+)
+
+
+class SourceFilesMixin:
+    """源文件管理 Mixin。"""
+
+    def list_source_files(self, task_id: str) -> list[dict[str, Any]]:
+        self.get_task(task_id)
+        with self.connect() as conn:
+            rows = conn.execute(
+                """
+                SELECT id, task_id, storage_object_id, name, size_bytes, record_count,
+                       file_format, checksum_sha256, version_no, content_preview, metadata,
+                       tenant_id, project_id, created_by, created_at, updated_at
+                FROM data_process_source_files
+                WHERE task_id=%s AND deleted_at IS NULL
+                ORDER BY created_at, id
+                """,
+                (task_id,),
+            ).fetchall()
+        return [_decode_row(row) or {} for row in rows]
+
+    def add_source_file(
+        self,
+        task_id: str,
+        *,
+        name: str,
+        content: str,
+        raw_size: int,
+        checksum_sha256: str,
+        file_format: str,
+        record_count: int,
+        metadata: dict[str, Any] | None = None,
+        created_by: str | None = None,
+        source_file_id: str | None = None,
+        storage_object_id: str | None = None,
+    ) -> dict[str, Any]:
+        return self.add_source_files(
+            task_id,
+            [
+                {
+                    "name": name,
+                    "content": content,
+                    "raw_size": raw_size,
+                    "checksum_sha256": checksum_sha256,
+                    "file_format": file_format,
+                    "record_count": record_count,
+                    "metadata": metadata or {},
+                    "created_by": created_by,
+                    "id": source_file_id,
+                    "storage_object_id": storage_object_id,
+                }
+            ],
+        )[0]
+
+    def add_source_files(
+        self,
+        task_id: str,
+        files: Sequence[dict[str, Any]],
+    ) -> list[dict[str, Any]]:
+        """在同一事务中登记一个上传批次，任一文件失败则全部回滚。"""
+
+        if not files:
+            raise DataProcessStoreError("at least one source file is required")
+        now = utcnow()
+        created: list[dict[str, Any]] = []
+        try:
+            with self.connect() as conn:
+                task = self._task_in_connection(conn, task_id, for_update=True)
+                self._ensure_editable(task)
+                for payload in files:
+                    file_id = str(payload.get("id") or new_id("dpsf"))
+                    storage_object_id, metadata_payload = _source_storage_descriptor(
+                        payload,
+                        task_id,
+                        file_id,
+                    )
+                    row = conn.execute(
+                        """
+                        INSERT INTO data_process_source_files
+                        (id, task_id, storage_object_id, name, size_bytes, record_count,
+                         file_format, checksum_sha256, version_no, content, content_preview,
+                         metadata, tenant_id, project_id,
+                         created_by, created_at, updated_at)
+                        VALUES (%s, %s, %s, %s, %s, %s, %s, %s, 1, %s, %s, %s, %s,
+                                %s, %s, %s, %s)
+                        RETURNING id, task_id, storage_object_id, name, size_bytes, record_count,
+                                  file_format, checksum_sha256, version_no, content_preview, metadata,
+                                  tenant_id, project_id, created_by, created_at, updated_at
+                        """,
+                        (
+                            file_id,
+                            task_id,
+                            storage_object_id,
+                            payload["name"],
+                            payload["raw_size"],
+                            payload["record_count"],
+                            payload["file_format"],
+                            payload["checksum_sha256"],
+                            "" if str(storage_object_id or "").startswith("minio://") else payload["content"],
+                            str(payload["content"])[:2000],
+                            json_dumps(metadata_payload),
+                            task.get("tenant_id"),
+                            task.get("project_id"),
+                            payload.get("created_by") or task.get("created_by"),
+                            now,
+                            now,
+                        ),
+                    ).fetchone()
+                    created.append(_decode_row(row) or {})
+                preview_row = conn.execute(
+                    """
+                    SELECT COUNT(*) AS count FROM data_process_preview_items
+                    WHERE task_id=%s
+                    """,
+                    (task_id,),
+                ).fetchone()
+                preview_count = int((preview_row or {}).get("count") or 0)
+                if _is_regeneration_prepared(task):
+                    conn.execute(
+                        """
+                        UPDATE data_process_tasks
+                        SET input_count=(
+                            SELECT COALESCE(SUM(record_count), 0)
+                            FROM data_process_source_files
+                            WHERE task_id=%s AND deleted_at IS NULL
+                        ), workflow_step='upload', preview_status='idle',
+                           preview_progress=0, preview_run_id=NULL,
+                           preview_failure_reason=NULL, preview_total_files=0,
+                           preview_completed_files=0, updated_at=%s
+                        WHERE id=%s
+                        """,
+                        (task_id, now, task_id),
+                    )
+                else:
+                    # 前端会只对本次新增的源文件构建预览，因此保留旧文件切片，
+                    # 但普通未发布任务的旧生成结果已经不再有效。
+                    conn.execute(
+                        "DELETE FROM data_process_results WHERE task_id=%s", (task_id,)
+                    )
+                    conn.execute(
+                        """
+                        UPDATE data_process_tasks
+                        SET status='pending', progress=%s, output_count=0, filtered_count=0,
+                            duplicate_count=0, error_count=0, failure_reason=NULL,
+                            generation_run_id=NULL, results_confirmed=FALSE,
+                            workflow_step='upload', preview_status='idle',
+                            preview_progress=0, preview_run_id=NULL,
+                            preview_failure_reason=NULL, preview_total_files=0,
+                            preview_completed_files=0,
+                            started_at=NULL, completed_at=NULL,
+                            input_count=(
+                                SELECT COALESCE(SUM(record_count), 0)
+                                FROM data_process_source_files
+                                WHERE task_id=%s AND deleted_at IS NULL
+                            ), updated_at=%s
+                        WHERE id=%s
+                        """,
+                        (20 if preview_count else 0, task_id, now, task_id),
+                    )
+        except psycopg.errors.UniqueViolation as exc:
+            raise ConflictError(
+                "the same source file content is already attached to this task"
+            ) from exc
+        return created
+
+    def get_source_file(
+        self, task_id: str, file_id: str, *, include_content: bool = True
+    ) -> dict[str, Any]:
+        # 先验证父任务仍然可见，避免软删除任务后通过已知文件 ID 读取正文。
+        self.get_task(task_id)
+        content_column = ", content" if include_content else ""
+        with self.connect() as conn:
+            row = conn.execute(
+                f"""
+                SELECT id, task_id, storage_object_id, name, size_bytes, record_count,
+                       file_format, checksum_sha256, version_no, content_preview, metadata,
+                       tenant_id, project_id, created_by, created_at, updated_at{content_column}
+                FROM data_process_source_files
+                WHERE id=%s AND task_id=%s AND deleted_at IS NULL
+                """,
+                (file_id, task_id),
+            ).fetchone()
+        if not row:
+            raise NotFoundError("source file not found")
+        decoded = _decode_row(row) or {}
+        # New source files keep only a preview in PostgreSQL. Load the
+        # authoritative body from MinIO on demand for existing processing code.
+        reference = str(decoded.get("storage_object_id") or "")
+        if include_content and not decoded.get("content") and reference.startswith("minio://"):
+            from app.modules.data_process.storage import get_data_process_storage
+
+            decoded["content"] = (get_data_process_storage().read(reference) or b"").decode(
+                "utf-8", errors="replace"
+            )
+        return decoded
+
+    def source_content_window(
+        self, task_id: str, file_id: str, offset: int, limit: int
+    ) -> dict[str, Any]:
+        source_file = self.get_source_file(task_id, file_id, include_content=True)
+        content = str(source_file.pop("content", ""))
+        window = content[offset : offset + limit]
+        return {
+            "file": source_file,
+            "content": window,
+            "offset": offset,
+            "limit": limit,
+            "total_chars": len(content),
+            "has_more": offset + len(window) < len(content),
+        }
+
+    def source_content_lines(
+        self,
+        task_id: str,
+        file_id: str,
+        start_line: int,
+        line_count: int,
+    ) -> dict[str, Any]:
+        source_file = self.get_source_file(task_id, file_id, include_content=True)
+        content = str(source_file.pop("content", ""))
+        lines = content.splitlines(keepends=True)
+        start_index = min(len(lines), start_line - 1)
+        selected = lines[start_index : start_index + line_count]
+        end_line = start_index + len(selected)
+        return {
+            "file": source_file,
+            "content": "".join(selected),
+            "start_line": start_line,
+            "end_line": end_line,
+            "line_count": len(selected),
+            "total_lines": len(lines),
+            "has_more": end_line < len(lines),
+        }
+
+    def delete_source_file(self, task_id: str, file_id: str) -> None:
+        with self.connect() as conn:
+            task = self._task_in_connection(conn, task_id, for_update=True)
+            self._ensure_editable(task)
+            row = conn.execute(
+                """
+                UPDATE data_process_source_files
+                SET deleted_at=%s, updated_at=%s
+                WHERE id=%s AND task_id=%s AND deleted_at IS NULL
+                RETURNING id
+                """,
+                (utcnow(), utcnow(), file_id, task_id),
+            ).fetchone()
+            if not row:
+                raise NotFoundError("source file not found")
+            conn.execute(
+                "DELETE FROM data_process_preview_items WHERE source_file_id=%s", (file_id,)
+            )
+            now = utcnow()
+            if _is_regeneration_prepared(task):
+                conn.execute(
+                    """
+                    UPDATE data_process_tasks
+                    SET input_count=(SELECT COALESCE(SUM(record_count), 0)
+                                     FROM data_process_source_files
+                                     WHERE task_id=%s AND deleted_at IS NULL),
+                        workflow_step='upload', preview_status='idle',
+                        preview_progress=0, preview_run_id=NULL,
+                        preview_failure_reason=NULL, preview_total_files=0,
+                        preview_completed_files=0, updated_at=%s
+                    WHERE id=%s
+                    """,
+                    (task_id, now, task_id),
+                )
+            else:
+                conn.execute(
+                    "DELETE FROM data_process_results WHERE task_id=%s", (task_id,)
+                )
+                conn.execute(
+                    """
+                    UPDATE data_process_tasks
+                    SET status='pending', progress=0, output_count=0, filtered_count=0,
+                        duplicate_count=0, error_count=0, failure_reason=NULL,
+                        results_confirmed=FALSE,
+                        workflow_step='upload', preview_status='idle',
+                        preview_progress=0, preview_run_id=NULL,
+                        preview_failure_reason=NULL, preview_total_files=0,
+                        preview_completed_files=0,
+                        input_count=(SELECT COALESCE(SUM(record_count), 0)
+                                     FROM data_process_source_files
+                                     WHERE task_id=%s AND deleted_at IS NULL),
+                        updated_at=%s
+                    WHERE id=%s
+                    """,
+                    (task_id, now, task_id),
+                )

backend/app/modules/data_process/store/tasks.py

@@ -0,0 +1,879 @@
+"""数据处理存储层 - 任务管理。"""
+
+from __future__ import annotations
+
+from typing import Any
+from collections.abc import Sequence
+
+import psycopg
+
+from .base import (
+    StoreBase,
+    utcnow,
+    new_id,
+    repeat_task_id,
+    json_dumps,
+    _json_value,
+    _decode_row,
+    _public_task,
+    _business_config,
+    _preview_config_value,
+    _preview_config_changed,
+    _preview_config_projection,
+    _normalized_preprocess_options,
+    _regeneration_marker,
+    _is_regeneration_prepared,
+    _task_output_type,
+    _task_reasoning_detail,
+    _reasoning_output_is_valid,
+    _dpo_fields_are_valid,
+    _source_storage_descriptor,
+    _serialize_value,
+    NotFoundError,
+    ConflictError,
+    InvalidStateError,
+    EDITABLE_STATUSES,
+    ACTIVE_PREVIEW_STATUSES,
+    WORKFLOW_STEPS,
+    _REGENERATION_MARKER_KEY,
+    _REPEAT_SOURCE_TASK_KEY,
+    _REPEAT_REQUEST_KEY,
+    _INTERNAL_CONFIG_KEYS,
+)
+
+from ..algorithms import estimate_token_count
+
+class TasksMixin:
+    """任务管理 Mixin。"""
+
+    def list_tasks(
+        self,
+        *,
+        page: int = 1,
+        page_size: int = 20,
+        keyword: str | None = None,
+        status: str | None = None,
+        process_type: str | None = None,
+        tenant_id: str | None = None,
+        project_id: str | None = None,
+    ) -> dict[str, Any]:
+        clauses = ["task.deleted_at IS NULL"]
+        params: list[Any] = []
+        if keyword:
+            clauses.append("(task.name ILIKE %s OR COALESCE(task.description, '') ILIKE %s)")
+            pattern = f"%{keyword.strip()}%"
+            params.extend([pattern, pattern])
+        if status:
+            clauses.append("task.status = %s")
+            params.append(status)
+        if process_type:
+            clauses.append("task.process_type = %s")
+            params.append(process_type)
+        if tenant_id:
+            clauses.append("task.tenant_id = %s")
+            params.append(tenant_id)
+        if project_id:
+            clauses.append("task.project_id = %s")
+            params.append(project_id)
+        where = " AND ".join(clauses)
+        with self.connect() as conn:
+            total = conn.execute(
+                f"SELECT COUNT(*) AS count FROM data_process_tasks task WHERE {where}",
+                params,
+            ).fetchone()["count"]
+            rows = conn.execute(
+                f"""
+                SELECT task.*,
+                       creator.display_name AS creator_name,
+                       processor.display_name AS processor_name,
+                       (SELECT COUNT(*) FROM data_process_source_files source_file
+                        WHERE source_file.task_id=task.id
+                          AND source_file.deleted_at IS NULL) AS source_file_count
+                FROM data_process_tasks task
+                LEFT JOIN users creator ON creator.id=task.created_by
+                LEFT JOIN users processor ON processor.id=task.updated_by
+                WHERE {where}
+                ORDER BY task.created_at DESC, task.id DESC
+                LIMIT %s OFFSET %s
+                """,
+                [*params, page_size, (page - 1) * page_size],
+            ).fetchall()
+        return {
+            "items": [_public_task(_decode_row(row)) for row in rows],
+            "total": int(total),
+            "page": page,
+            "page_size": page_size,
+        }
+
+    def create_task(self, payload: dict[str, Any]) -> dict[str, Any]:
+        task_id = new_id("dpt")
+        now = utcnow()
+        try:
+            with self.connect() as conn:
+                row = conn.execute(
+                    """
+                    INSERT INTO data_process_tasks
+                    (id, name, description, status, process_type, source_dataset_id, config,
+                     progress, results_confirmed, tenant_id, project_id, owner_id, created_by, updated_by,
+                     created_at, updated_at)
+                    VALUES (%s, %s, %s, 'pending', %s, %s, %s, 0, FALSE,
+                            %s, %s, %s, %s, %s, %s, %s)
+                    RETURNING *
+                    """,
+                    (
+                        task_id,
+                        payload["name"],
+                        payload.get("description") or "",
+                        payload["process_type"],
+                        payload.get("source_dataset_id"),
+                        json_dumps(_business_config(payload.get("config"))),
+                        payload.get("tenant_id"),
+                        payload.get("project_id"),
+                        payload.get("owner_id"),
+                        payload.get("created_by"),
+                        payload.get("created_by"),
+                        now,
+                        now,
+                    ),
+                ).fetchone()
+        except psycopg.errors.UniqueViolation as exc:
+            raise ConflictError("data process task name already exists") from exc
+        return _public_task(_decode_row(row)) or {}
+
+    @staticmethod
+    def _repeat_response(
+        conn: psycopg.Connection[dict[str, Any]],
+        row: dict[str, Any],
+        *,
+        source_task_id: str,
+        created: bool,
+    ) -> dict[str, Any]:
+        task_id = str(row["id"])
+        counts = conn.execute(
+            """
+            SELECT
+              (SELECT COUNT(*) FROM data_process_source_files
+               WHERE task_id=%s AND deleted_at IS NULL) AS source_file_count,
+              (SELECT COUNT(*) FROM data_process_preview_items
+               WHERE task_id=%s) AS preview_count
+            """,
+            (task_id, task_id),
+        ).fetchone() or {}
+        task = _public_task(_decode_row(row)) or {}
+        task["source_file_count"] = int(counts.get("source_file_count") or 0)
+        task["preview_count"] = int(counts.get("preview_count") or 0)
+        return {
+            "task": task,
+            "source_task_id": source_task_id,
+            "created": created,
+            "copied_source_file_count": task["source_file_count"],
+            "copied_preview_count": task["preview_count"],
+        }
+
+    def find_repeated_task(
+        self,
+        source_task_id: str,
+        request_id: str,
+    ) -> dict[str, Any] | None:
+        """查找同一幂等请求已创建的新任务。"""
+
+        task_id = repeat_task_id(source_task_id, request_id)
+        with self.connect() as conn:
+            row = conn.execute(
+                "SELECT * FROM data_process_tasks WHERE id=%s",
+                (task_id,),
+            ).fetchone()
+            if row is None:
+                return None
+            decoded = _decode_row(row) or {}
+            config = decoded.get("config") or {}
+            if (
+                config.get(_REPEAT_SOURCE_TASK_KEY) != source_task_id
+                or config.get(_REPEAT_REQUEST_KEY) != request_id
+            ):
+                raise ConflictError("再次生成请求与现有任务冲突")
+            if decoded.get("deleted_at"):
+                raise ConflictError("此次再次生成创建的任务已被删除，请重新发起")
+            return self._repeat_response(
+                conn,
+                row,
+                source_task_id=source_task_id,
+                created=False,
+            )
+
+    def repeat_task(
+        self,
+        source_task_id: str,
+        *,
+        expected_updated_at: str,
+        request_id: str,
+        file_copies: dict[str, dict[str, str]],
+    ) -> dict[str, Any]:
+        """复制已确认任务的配置、源文件和预览，结果与发布数据保持独立。"""
+
+        task_id = repeat_task_id(source_task_id, request_id)
+        now = utcnow()
+        try:
+            with self.connect() as conn:
+                existing = conn.execute(
+                    "SELECT * FROM data_process_tasks WHERE id=%s FOR UPDATE",
+                    (task_id,),
+                ).fetchone()
+                if existing is not None:
+                    decoded = _decode_row(existing) or {}
+                    config = decoded.get("config") or {}
+                    if (
+                        config.get(_REPEAT_SOURCE_TASK_KEY) != source_task_id
+                        or config.get(_REPEAT_REQUEST_KEY) != request_id
+                    ):
+                        raise ConflictError("再次生成请求与现有任务冲突")
+                    if decoded.get("deleted_at"):
+                        raise ConflictError("此次再次生成创建的任务已被删除，请重新发起")
+                    return self._repeat_response(
+                        conn,
+                        existing,
+                        source_task_id=source_task_id,
+                        created=False,
+                    )
+
+                source_task = self._task_in_connection(
+                    conn,
+                    source_task_id,
+                    for_update=True,
+                )
+                if (
+                    source_task.get("status") != "completed"
+                    or source_task.get("results_confirmed") is False
+                ):
+                    raise InvalidStateError("只有已完成并确认结果的任务可以再次生成")
+                if source_task.get("preview_status") in ACTIVE_PREVIEW_STATUSES:
+                    raise ConflictError("源任务仍在处理切分，暂时不能再次生成")
+                if expected_updated_at != _serialize_value(source_task.get("updated_at")):
+                    raise ConflictError("源任务已被其他操作修改，请刷新后重试")
+
+                source_files = conn.execute(
+                    """
+                    SELECT * FROM data_process_source_files
+                    WHERE task_id=%s AND deleted_at IS NULL
+                    ORDER BY created_at, id
+                    """,
+                    (source_task_id,),
+                ).fetchall()
+                source_file_ids = {str(row["id"]) for row in source_files}
+                if source_file_ids != set(file_copies):
+                    raise ConflictError("源文件快照已变化，请刷新后重试")
+                previews = conn.execute(
+                    """
+                    SELECT * FROM data_process_preview_items
+                    WHERE task_id=%s
+                    ORDER BY source_file_id NULLS LAST, source_start NULLS LAST,
+                             created_at, id
+                    """,
+                    (source_task_id,),
+                ).fetchall()
+                if not previews:
+                    raise InvalidStateError("源任务没有可用于再次生成的切分结果")
+
+                suffix = f"（再次生成-{task_id[-6:]}）"
+                base_name = str(source_task.get("name") or "数据处理任务")
+                repeated_name = f"{base_name[: max(1, 150 - len(suffix))]}{suffix}"
+                repeated_config = _business_config(source_task.get("config") or {})
+                repeated_config[_REPEAT_SOURCE_TASK_KEY] = source_task_id
+                repeated_config[_REPEAT_REQUEST_KEY] = request_id
+                input_count = sum(int(row.get("record_count") or 0) for row in source_files)
+                task_row = conn.execute(
+                    """
+                    INSERT INTO data_process_tasks
+                    (id, name, description, status, process_type, source_dataset_id,
+                     output_dataset_id, config, progress, input_count, output_count,
+                     filtered_count, duplicate_count, error_count, failure_reason,
+                     generation_run_id, results_confirmed, workflow_step,
+                     preview_status, preview_progress, preview_run_id,
+                     preview_failure_reason, preview_total_files,
+                     preview_completed_files, tenant_id, project_id, owner_id,
+                     approval_status, created_by, updated_by, created_at, updated_at)
+                    VALUES
+                    (%s, %s, %s, 'pending', %s, %s, NULL, %s, 20, %s, 0,
+                     0, 0, 0, NULL, NULL, FALSE, 'preview', 'completed', 100,
+                     NULL, NULL, %s, %s, %s, %s, %s, %s, %s, %s, %s, %s)
+                    RETURNING *
+                    """,
+                    (
+                        task_id,
+                        repeated_name,
+                        source_task.get("description") or "",
+                        source_task["process_type"],
+                        source_task.get("source_dataset_id"),
+                        json_dumps(repeated_config),
+                        input_count,
+                        len(source_files),
+                        len(source_files),
+                        source_task.get("tenant_id"),
+                        source_task.get("project_id"),
+                        source_task.get("owner_id"),
+                        source_task.get("approval_status") or "not_required",
+                        source_task.get("created_by"),
+                        source_task.get("created_by"),
+                        now,
+                        now,
+                    ),
+                ).fetchone()
+
+                file_id_map: dict[str, str] = {}
+                for source in source_files:
+                    old_file_id = str(source["id"])
+                    copy = file_copies[old_file_id]
+                    new_file_id = str(copy["id"])
+                    storage_object_id, metadata = _source_storage_descriptor(
+                        {
+                            "storage_object_id": copy["storage_object_id"],
+                            "metadata": _json_value(source.get("metadata"), {}),
+                        },
+                        task_id,
+                        new_file_id,
+                    )
+                    file_id_map[old_file_id] = new_file_id
+                    conn.execute(
+                        """
+                        INSERT INTO data_process_source_files
+                        (id, task_id, storage_object_id, name, size_bytes, record_count,
+                         file_format, checksum_sha256, version_no, content,
+                         content_preview, metadata, tenant_id, project_id, created_by,
+                         created_at, updated_at)
+                        VALUES (%s, %s, %s, %s, %s, %s, %s, %s, 1, %s, %s, %s,
+                                %s, %s, %s, %s, %s)
+                        """,
+                        (
+                            new_file_id,
+                            task_id,
+                            storage_object_id,
+                            source["name"],
+                            source.get("size_bytes") or 0,
+                            source.get("record_count") or 0,
+                            source.get("file_format"),
+                            source["checksum_sha256"],
+                            source.get("content") or "",
+                            source.get("content_preview"),
+                            json_dumps(metadata),
+                            source_task.get("tenant_id"),
+                            source_task.get("project_id"),
+                            source.get("created_by") or source_task.get("created_by"),
+                            now,
+                            now,
+                        ),
+                    )
+
+                for preview in previews:
+                    old_source_file_id = preview.get("source_file_id")
+                    conn.execute(
+                        """
+                        INSERT INTO data_process_preview_items
+                        (id, task_id, source_file_id, original_content, edited_content,
+                         source_start, source_end, source_start_line, source_end_line,
+                         token_count, status, quality_score, created_at, updated_at)
+                        VALUES (%s, %s, %s, %s, %s, %s, %s, %s, %s, %s, %s, %s,
+                                %s, %s)
+                        """,
+                        (
+                            new_id("dpp"),
+                            task_id,
+                            file_id_map.get(str(old_source_file_id))
+                            if old_source_file_id
+                            else None,
+                            preview.get("original_content") or "",
+                            preview.get("edited_content") or "",
+                            preview.get("source_start"),
+                            preview.get("source_end"),
+                            preview.get("source_start_line"),
+                            preview.get("source_end_line"),
+                            max(0, int(preview.get("token_count") or 0)),
+                            preview.get("status") or "original",
+                            json_dumps(_json_value(preview.get("quality_score"), {})),
+                            now,
+                            now,
+                        ),
+                    )
+                return self._repeat_response(
+                    conn,
+                    task_row or {},
+                    source_task_id=source_task_id,
+                    created=True,
+                )
+        except psycopg.errors.UniqueViolation as exc:
+            raise ConflictError("再次生成任务名称或请求发生冲突，请重试") from exc
+
+    def get_task(self, task_id: str, *, for_update: bool = False) -> dict[str, Any]:
+        lock = " FOR UPDATE" if for_update else ""
+        with self.connect() as conn:
+            if for_update:
+                row = conn.execute(
+                    f"SELECT * FROM data_process_tasks WHERE id=%s AND deleted_at IS NULL{lock}",
+                    (task_id,),
+                ).fetchone()
+            else:
+                row = conn.execute(
+                    """
+                    SELECT task.*,
+                           creator.display_name AS creator_name,
+                           processor.display_name AS processor_name,
+                           (SELECT COUNT(*) FROM data_process_source_files source
+                            WHERE source.task_id=task.id AND source.deleted_at IS NULL)
+                             AS source_file_count,
+                           (SELECT COUNT(*) FROM data_process_preview_items preview
+                            WHERE preview.task_id=task.id) AS preview_count,
+                           (SELECT COALESCE(json_agg(json_build_object(
+                               'id', dataset.id,
+                               'name', dataset.name,
+                               'type', dataset.type,
+                               'count', dataset.count,
+                               'dataset_split', CASE dataset.type
+                                   WHEN 'train' THEN 'train'
+                                   WHEN 'val' THEN 'validation'
+                                   WHEN 'test' THEN 'test'
+                                   ELSE NULL
+                               END
+                           ) ORDER BY CASE dataset.type
+                               WHEN 'train' THEN 1 WHEN 'val' THEN 2 WHEN 'test' THEN 3 ELSE 4 END), '[]'::json)
+                            FROM datasets dataset
+                            WHERE dataset.source='task'
+                              AND dataset.deleted_at IS NULL
+                              AND (
+                                  dataset.source_task_id=task.id
+                                  OR (dataset.source_task_id IS NULL AND dataset.task_id=task.id)
+                              ))
+                             AS output_datasets,
+                           CASE
+                             WHEN task.started_at IS NOT NULL AND task.completed_at IS NOT NULL
+                             THEN EXTRACT(EPOCH FROM (task.completed_at - task.started_at))
+                             ELSE NULL
+                           END AS duration_seconds
+                    FROM data_process_tasks task
+                    LEFT JOIN users creator ON creator.id=task.created_by
+                    LEFT JOIN users processor ON processor.id=task.updated_by
+                    WHERE task.id=%s AND task.deleted_at IS NULL
+                    """,
+                    (task_id,),
+                ).fetchone()
+        if not row:
+            raise NotFoundError("data process task not found")
+        return _public_task(_decode_row(row)) or {}
+
+    def _task_in_connection(
+        self,
+        conn: psycopg.Connection[dict[str, Any]],
+        task_id: str,
+        *,
+        for_update: bool = False,
+    ) -> dict[str, Any]:
+        lock = " FOR UPDATE" if for_update else ""
+        row = conn.execute(
+            f"SELECT * FROM data_process_tasks WHERE id=%s AND deleted_at IS NULL{lock}",
+            (task_id,),
+        ).fetchone()
+        if not row:
+            raise NotFoundError("data process task not found")
+        return _decode_row(row) or {}
+
+    @staticmethod
+    def _ensure_editable(task: dict[str, Any]) -> None:
+        if task["status"] not in EDITABLE_STATUSES:
+            raise InvalidStateError(f"task cannot be edited while status is {task['status']}")
+        if task.get("preview_status") in ACTIVE_PREVIEW_STATUSES:
+            raise InvalidStateError("task cannot be edited while preview is running")
+        if task.get("output_dataset_id") and not _is_regeneration_prepared(task):
+            raise InvalidStateError("published task cannot be edited")
+
+    def update_workflow_step(self, task_id: str, workflow_step: str) -> dict[str, Any]:
+        """独立保存向导位置，不触发配置或结果失效逻辑。"""
+
+        if workflow_step not in WORKFLOW_STEPS:
+            raise ValueError("invalid data process workflow step")
+        with self.connect() as conn:
+            row = conn.execute(
+                """
+                UPDATE data_process_tasks
+                SET workflow_step=%s, updated_at=%s
+                WHERE id=%s AND deleted_at IS NULL
+                RETURNING *
+                """,
+                (workflow_step, utcnow(), task_id),
+            ).fetchone()
+        if not row:
+            raise NotFoundError("data process task not found")
+        return _public_task(_decode_row(row)) or {}
+
+    def recover_legacy_aborted_regeneration(self, task_id: str) -> dict[str, Any]:
+        """恢复旧版在真正开始生成前误删的上一轮结果。
+
+        旧实现会在 ``POST /regenerate`` 时立即把已发布任务置为 pending、
+        清空结果并解除输出指针。三个已发布数据集仍是独立完整产物，因此只在
+        这个特征完全匹配时，使用其记录恢复结果和任务状态。该操作幂等，不会
+        触碰正常的新建待生成任务或已经开始的新一轮生成。
+        """
+
+        with self.connect() as conn:
+            task = self._task_in_connection(conn, task_id, for_update=True)
+            if (
+                task.get("status") != "pending"
+                or task.get("generation_run_id")
+                or task.get("output_dataset_id")
+                or int(task.get("output_count") or 0) != 0
+            ):
+                return {"recovered": False, "result_count": 0}
+
+            result_count = int(
+                (
+                    conn.execute(
+                        "SELECT COUNT(*) AS count FROM data_process_results WHERE task_id=%s",
+                        (task_id,),
+                    ).fetchone()
+                    or {}
+                ).get("count")
+                or 0
+            )
+            if result_count:
+                return {"recovered": False, "result_count": result_count}
+
+            datasets = conn.execute(
+                """
+                SELECT id, type, count, created_at
+                FROM datasets
+                WHERE source='task' AND deleted_at IS NULL
+                  AND (
+                      source_task_id=%s
+                      OR (source_task_id IS NULL AND task_id=%s)
+                  )
+                ORDER BY CASE type
+                    WHEN 'train' THEN 1 WHEN 'val' THEN 2 WHEN 'test' THEN 3 ELSE 4
+                END, created_at, id
+                """,
+                (task_id, task_id),
+            ).fetchall()
+            train_dataset = next(
+                (dataset for dataset in datasets if dataset.get("type") == "train"),
+                None,
+            )
+            if not train_dataset:
+                return {"recovered": False, "result_count": 0}
+
+            dataset_ids = [str(dataset["id"]) for dataset in datasets]
+            records = conn.execute(
+                """
+                SELECT id, dataset_id, line_no, split, instruction, input, output,
+                       raw, status, source_result_id, preview_item_id, created_at
+                FROM dataset_records
+                WHERE dataset_id = ANY(%s)
+                ORDER BY created_at, dataset_id, line_no NULLS LAST, id
+                """,
+                (dataset_ids,),
+            ).fetchall()
+            if not records:
+                return {"recovered": False, "result_count": 0}
+
+            preview_rows = conn.execute(
+                "SELECT id FROM data_process_preview_items WHERE task_id=%s",
+                (task_id,),
+            ).fetchall()
+            preview_ids = {str(row["id"]) for row in preview_rows}
+            used_result_ids: set[str] = set()
+            recovered_count = 0
+            for record in records:
+                raw = _json_value(record.get("raw"), {})
+                raw = raw if isinstance(raw, dict) else {}
+                candidate_id = str(
+                    record.get("source_result_id")
+                    or raw.get("source_result_id")
+                    or ""
+                )
+                result_id = (
+                    candidate_id
+                    if candidate_id and candidate_id not in used_result_ids
+                    else new_id("dpr")
+                )
+                used_result_ids.add(result_id)
+                candidate_preview_id = str(
+                    record.get("preview_item_id")
+                    or raw.get("preview_item_id")
+                    or ""
+                )
+                preview_item_id = (
+                    candidate_preview_id if candidate_preview_id in preview_ids else None
+                )
+                instruction = str(record.get("instruction") or raw.get("instruction") or "")
+                input_text = str(record.get("input") or raw.get("input") or "")
+                chosen = str(raw.get("chosen") or "")
+                rejected = str(raw.get("rejected") or "")
+                output = str(
+                    record.get("output") or raw.get("output") or chosen or ""
+                )
+                split = str(record.get("split") or raw.get("split") or "") or None
+                status = str(record.get("status") or "valid")
+                if status not in {"valid", "modified", "invalid"}:
+                    status = "valid"
+                created_at = record.get("created_at") or utcnow()
+                conn.execute(
+                    """
+                    INSERT INTO data_process_results
+                    (id, task_id, preview_item_id, instruction, input, output,
+                     chosen, rejected, original_instruction, original_input,
+                     original_output, original_chosen, original_rejected, status,
+                     error, split, quality_score, created_at, updated_at)
+                    VALUES (%s, %s, %s, %s, %s, %s, %s, %s, %s, %s, %s, %s,
+                            %s, %s, NULL, %s, '{}', %s, %s)
+                    """,
+                    (
+                        result_id,
+                        task_id,
+                        preview_item_id,
+                        instruction,
+                        input_text,
+                        output,
+                        chosen,
+                        rejected,
+                        instruction,
+                        input_text,
+                        output,
+                        chosen,
+                        rejected,
+                        status,
+                        split,
+                        created_at,
+                        created_at,
+                    ),
+                )
+                conn.execute(
+                    """
+                    UPDATE dataset_records
+                    SET source_result_id=%s, preview_item_id=%s
+                    WHERE id=%s
+                    """,
+                    (result_id, preview_item_id, record["id"]),
+                )
+                recovered_count += 1
+
+            now = utcnow()
+            conn.execute(
+                """
+                UPDATE data_process_tasks
+                SET status='completed', progress=100, output_dataset_id=%s,
+                    output_count=%s, filtered_count=0, duplicate_count=0,
+                    error_count=(SELECT COUNT(*) FROM data_process_results
+                                 WHERE task_id=%s AND status='invalid'),
+                    failure_reason=NULL, results_confirmed=TRUE,
+                    workflow_step='results', updated_at=%s
+                WHERE id=%s
+                """,
+                (
+                    train_dataset["id"],
+                    recovered_count,
+                    task_id,
+                    now,
+                    task_id,
+                ),
+            )
+            return {"recovered": True, "result_count": recovered_count}
+
+    def update_task(self, task_id: str, payload: dict[str, Any]) -> dict[str, Any]:
+        allowed = {
+            "name",
+            "description",
+            "process_type",
+            "source_dataset_id",
+        }
+        values: dict[str, Any] = {key: value for key, value in payload.items() if key in allowed}
+        if not values and payload.get("config") is None:
+            return self.get_task(task_id)
+        try:
+            with self.connect() as conn:
+                task = self._task_in_connection(conn, task_id, for_update=True)
+                self._ensure_editable(task)
+                regeneration_prepared = _is_regeneration_prepared(task)
+                if regeneration_prepared and any(
+                    key in payload and payload.get(key) != task.get(key)
+                    for key in ("process_type", "source_dataset_id")
+                ):
+                    raise InvalidStateError(
+                        "process type and source dataset cannot change during regeneration"
+                    )
+                if payload.get("config") is not None:
+                    next_config = _business_config(payload["config"])
+                    current_config = dict(task.get("config") or {})
+                    for key in _INTERNAL_CONFIG_KEYS:
+                        if key in current_config:
+                            next_config[key] = current_config[key]
+                    values["config"] = json_dumps(next_config)
+                invalidates_results = (
+                    ("config" in payload and payload.get("config") != task.get("config"))
+                    or (
+                        "process_type" in payload
+                        and payload.get("process_type") != task.get("process_type")
+                    )
+                    or (
+                        "source_dataset_id" in payload
+                        and payload.get("source_dataset_id") != task.get("source_dataset_id")
+                    )
+                )
+                if invalidates_results and not regeneration_prepared:
+                    values.update(
+                        {
+                            "status": "pending",
+                            "progress": 0,
+                            "output_count": 0,
+                            "filtered_count": 0,
+                            "duplicate_count": 0,
+                            "error_count": 0,
+                            "failure_reason": None,
+                            "generation_run_id": None,
+                            "results_confirmed": False,
+                            "preview_status": "idle",
+                            "preview_progress": 0,
+                            "preview_run_id": None,
+                            "preview_failure_reason": None,
+                            "preview_total_files": 0,
+                            "preview_completed_files": 0,
+                            "started_at": None,
+                            "completed_at": None,
+                        }
+                    )
+                    conn.execute("DELETE FROM data_process_results WHERE task_id=%s", (task_id,))
+                    conn.execute(
+                        "DELETE FROM data_process_preview_items WHERE task_id=%s", (task_id,)
+                    )
+                if (
+                    "process_type" in payload
+                    and payload.get("process_type") != task.get("process_type")
+                ):
+                    conn.execute(
+                        """
+                        UPDATE data_process_source_files
+                        SET deleted_at=%s, updated_at=%s
+                        WHERE task_id=%s AND deleted_at IS NULL
+                        """,
+                        (utcnow(), utcnow(), task_id),
+                    )
+                    values["input_count"] = 0
+                values["updated_at"] = utcnow()
+                assignments = ", ".join(f"{key}=%s" for key in values)
+                row = conn.execute(
+                    f"UPDATE data_process_tasks SET {assignments} WHERE id=%s RETURNING *",
+                    [*values.values(), task_id],
+                ).fetchone()
+        except psycopg.errors.UniqueViolation as exc:
+            raise ConflictError("data process task name already exists") from exc
+        return _public_task(_decode_row(row)) or {}
+
+    def prepare_regeneration(
+        self,
+        task_id: str,
+        payload: dict[str, Any],
+    ) -> dict[str, Any]:
+        """非破坏性地保存重新生成配置。
+
+        准备阶段保留任务当前状态、结果、切片及已发布数据集。真正开始
+        生成时，才在同一事务内切换运行状态并清理上一轮结果。
+        """
+
+        # 先修复曾被旧版 prepare 提前清空的任务，再建立新的非破坏性草稿标记。
+        self.recover_legacy_aborted_regeneration(task_id)
+        try:
+            with self.connect() as conn:
+                task = self._task_in_connection(conn, task_id, for_update=True)
+                if task["status"] == "running":
+                    raise ConflictError("running task cannot be prepared for regeneration")
+                if task.get("preview_status") in ACTIVE_PREVIEW_STATUSES:
+                    raise ConflictError("running preview cannot be prepared for regeneration")
+
+                current_updated_at = _serialize_value(task.get("updated_at"))
+                if payload["expected_updated_at"] != current_updated_at:
+                    raise ConflictError("data process task was modified by another request")
+
+                process_type = str(payload["process_type"])
+                if process_type != str(task["process_type"]):
+                    raise InvalidStateError("process_type cannot be changed during regeneration")
+
+                current_config = dict(task.get("config") or {})
+                next_config = _business_config(payload.get("config"))
+                for key in (_REPEAT_SOURCE_TASK_KEY, _REPEAT_REQUEST_KEY):
+                    if key in current_config:
+                        next_config[key] = current_config[key]
+                preview_invalidated = _preview_config_changed(
+                    process_type,
+                    current_config,
+                    next_config,
+                )
+                now = utcnow()
+                next_config[_REGENERATION_MARKER_KEY] = {
+                    "prepared": True,
+                    "preview_invalidated": preview_invalidated,
+                    "prepared_at": now,
+                }
+                # 002 迁移前发布的数据集只有 task_id。先补齐新关联字段，保证
+                # 解除任务输出指针后，详情和后续重新发布仍能定位原来的三份数据集。
+                conn.execute(
+                    """
+                    UPDATE datasets
+                    SET source_task_id=%s, updated_at=%s
+                    WHERE source='task' AND source_task_id IS NULL AND task_id=%s
+                      AND deleted_at IS NULL
+                    """,
+                    (task_id, now, task_id),
+                )
+                published_row = conn.execute(
+                    """
+                    SELECT EXISTS(
+                        SELECT 1 FROM datasets
+                        WHERE source='task' AND deleted_at IS NULL
+                          AND (
+                              source_task_id=%s
+                              OR (source_task_id IS NULL AND task_id=%s)
+                          )
+                    ) AS exists
+                    """,
+                    (task_id, task_id),
+                ).fetchone()
+                published_outputs_preserved = bool(task.get("output_dataset_id")) or bool(
+                    published_row and published_row.get("exists")
+                )
+
+                row = conn.execute(
+                    """
+                    UPDATE data_process_tasks
+                    SET name=%s, description=%s, config=%s, updated_at=%s
+                    WHERE id=%s
+                    RETURNING *
+                    """,
+                    (
+                        payload["name"],
+                        payload.get("description") or "",
+                        json_dumps(next_config),
+                        now,
+                        task_id,
+                    ),
+                ).fetchone()
+        except psycopg.errors.UniqueViolation as exc:
+            raise ConflictError("data process task name already exists") from exc
+        return {
+            "task": _public_task(_decode_row(row)) or {},
+            "preview_invalidated": preview_invalidated,
+            "published_outputs_preserved": published_outputs_preserved,
+        }
+
+    def delete_task(self, task_id: str, *, deleted_by: str | None = None) -> None:
+        with self.connect() as conn:
+            self._task_in_connection(conn, task_id, for_update=True)
+            now = utcnow()
+            conn.execute(
+                """
+                UPDATE data_process_tasks
+                SET status=CASE WHEN status='running' THEN 'stopped' ELSE status END,
+                    generation_run_id=NULL,
+                    preview_status=CASE
+                        WHEN preview_status IN ('queued', 'running') THEN 'cancelled'
+                        ELSE preview_status
+                    END,
+                    preview_run_id=NULL,
+                    deleted_at=%s, deleted_by=%s, updated_at=%s
+                WHERE id=%s
+                """,
+                (now, deleted_by, now, task_id),
+            )

backend/app/modules/dataset/__init__.py

@@ -0,0 +1 @@
+"""Dataset management module."""

backend/app/modules/engine_registry/__init__.py

@@ -0,0 +1 @@
+"""Training engine registry module."""

backend/app/modules/eval/__init__.py

@@ -0,0 +1 @@
+"""Evaluation module."""

backend/app/modules/file_gateway/__init__.py

@@ -0,0 +1 @@
+"""Application-side file gateway module."""

backend/app/modules/fine_tune/__init__.py

@@ -0,0 +1 @@
+"""Fine-tuning task module."""

backend/app/modules/gpu/__init__.py

@@ -0,0 +1 @@
+"""GPU assignment management module."""

backend/app/modules/gpu/router.py

@@ -0,0 +1,108 @@
+"""GPU 算力分配管理路由。"""
+from __future__ import annotations
+
+import json
+from typing import Any
+
+from fastapi import APIRouter, Body, Depends, Request
+
+from app.api.v1.endpoints.platform import ok, fail
+from app.core.auth import get_current_user, is_admin, user_tenant_ids
+from app.db.platform_store import get_platform_store
+
+router = APIRouter(prefix="/compute", tags=["gpu-assignment"])
+
+
+@router.get("/gpu-assignments")
+def list_assignments(current_user: dict = Depends(get_current_user)) -> dict[str, Any]:
+    """查看全部分配关系（仅 admin）。"""
+    if not is_admin(current_user):
+        raise fail(403, "admin permission required")
+    return ok(get_platform_store().gpu_assignments())
+
+
+@router.post("/gpu-assignments")
+def assign_gpus(
+    payload: dict[str, Any] = Body(...),
+    request: Request = None,
+    current_user: dict = Depends(get_current_user),
+) -> dict[str, Any]:
+    """批量分配 GPU（仅 admin）。body: { assignments: [{ node_id, gpu_index, user_id }] }"""
+    if not is_admin(current_user):
+        raise fail(403, "admin permission required")
+    assignments = payload.get("assignments") or []
+    if not assignments:
+        raise fail(400, "assignments 不能为空")
+    actor = current_user.get("id")
+    try:
+        result = get_platform_store().assign_gpus(assignments, assigned_by=actor)
+    except ValueError as exc:
+        raise fail(409, str(exc))
+    get_platform_store().record_audit(
+        action="gpu.assign",
+        actor_id=actor,
+        target_type="gpu",
+        detail=f"count={len(assignments)}",
+    )
+    return ok(result)
+
+
+@router.post("/gpu-assignments/request")
+def request_gpu_assignment(
+    payload: dict[str, Any] = Body(...),
+    current_user: dict = Depends(get_current_user),
+) -> dict[str, Any]:
+    assignments = payload.get("assignments") or []
+    if not assignments:
+        raise fail(400, "assignments 不能为空")
+    if is_admin(current_user):
+        try:
+            return ok(get_platform_store().assign_gpus(assignments, assigned_by=current_user.get("id")))
+        except ValueError as exc:
+            raise fail(409, str(exc))
+    user_id = str(current_user.get("id") or "")
+    normalized = []
+    for item in assignments:
+        if not isinstance(item, dict) or not item.get("node_id") or item.get("gpu_index") is None:
+            raise fail(400, "每项必须包含 node_id 和 gpu_index")
+        normalized.append({**item, "user_id": user_id})
+    instance = get_platform_store().create_approval_instance({
+        "resource_type": "gpu",
+        "resource_id": f"batch:{user_id}",
+        "applicant_id": user_id,
+        "action": "gpu.assign",
+        "tenant_id": current_user.get("tenant_id") or "default",
+        "reason": json.dumps({"assignments": normalized}, ensure_ascii=False),
+    })
+    get_platform_store().record_audit(
+        action="gpu.assign.request", actor_id=user_id, target_type="gpu",
+        target_id=instance["id"], tenant_id=current_user.get("tenant_id") or "default",
+        detail=f"count={len(normalized)}",
+    )
+    return ok({"approval_required": True, "approval_id": instance["id"], "approval": instance})
+
+
+@router.delete("/gpu-assignments/{assignment_id}")
+def unassign_gpu(
+    assignment_id: str,
+    request: Request = None,
+    current_user: dict = Depends(get_current_user),
+) -> dict[str, Any]:
+    """撤销 GPU 分配（仅 admin）。"""
+    if not is_admin(current_user):
+        raise fail(403, "admin permission required")
+    get_platform_store().unassign_gpu(assignment_id)
+    actor = current_user.get("id")
+    get_platform_store().record_audit(
+        action="gpu.unassign",
+        actor_id=actor,
+        target_type="gpu",
+        target_id=assignment_id,
+    )
+    return ok({"deleted": assignment_id})
+
+
+@router.get("/my-gpus")
+def my_gpus(current_user: dict = Depends(get_current_user)) -> dict[str, Any]:
+    """查看当前用户可用的 GPU 列表。"""
+    return ok(get_platform_store().gpu_assignments_for_user(current_user["id"]))

backend/app/modules/inference/__init__.py

@@ -0,0 +1 @@
+"""Inference and compare module."""

backend/app/modules/model/__init__.py

@@ -0,0 +1 @@
+"""Model registry module."""

backend/app/modules/project/__init__.py

@@ -0,0 +1 @@
+"""Project workspace and member module."""

backend/app/modules/project/router.py

@@ -0,0 +1,260 @@
+from __future__ import annotations
+
+from fastapi import APIRouter, Body, Depends, Request
+from typing import Any
+
+from app.api.v1.endpoints.platform import ok, fail
+from app.core.auth import filter_accessible_resource_ids, get_current_user, has_resource_access, is_admin
+from app.db.platform_store import get_platform_store
+
+router = APIRouter(prefix="/projects", tags=["project"])
+
+
+def _actor(request: Request) -> str | None:
+    auth = request.headers.get("Authorization", "")
+    token = auth.replace("Bearer ", "").strip()
+    return token or None
+
+
+def _require_no_pending_approval(resource_type: str, resource_id: str) -> None:
+    """第 4 周：写操作审批拦截——存在待审批实例时拒绝执行。"""
+    store = get_platform_store()
+    pending = [
+        i for i in store.approval_instances(status="pending")
+        if i["resource_type"] == resource_type and i["resource_id"] == resource_id
+    ]
+    if pending:
+        raise fail(409, "存在待审批的变更，请先完成审批")
+
+
+def _require_approval_or_admin(
+    resource_type: str,
+    resource_id: str,
+    current_user: dict[str, Any],
+    action_desc: str = "",
+    action: str = "project.change",
+) -> dict[str, Any] | None:
+    """高风险操作审批旁路：admin 直接放行，普通用户创建审批实例（code=202）。"""
+    if is_admin(current_user):
+        return None
+    if not has_resource_access(resource_type, resource_id, current_user, "write"):
+        raise fail(403, "no permission to request this project change")
+    store = get_platform_store()
+    if store.consume_approved_approval(resource_type, resource_id, str(current_user.get("id") or ""), action):
+        return None
+    instance = store.create_approval_instance({
+        "resource_type": resource_type,
+        "resource_id": resource_id,
+        "applicant_id": current_user.get("id"),
+        "template_id": None,
+        "action": action,
+        "tenant_id": current_user.get("tenant_id") or "default",
+        "reason": action_desc,
+    })
+    return {
+        "code": 202,
+        "message": f"操作已提交审批，等待管理员批准：{action_desc}",
+        "data": {"approval_required": True, "approval_id": instance["id"]},
+    }
+
+
+@router.get("")
+def list_projects(
+    tenant_id: str = "default",
+    status: str | None = None,
+    keyword: str | None = None,
+    current_user: dict = Depends(get_current_user),
+) -> dict[str, Any]:
+    store = get_platform_store()
+    projects = store.projects(tenant_id=tenant_id, status=status, keyword=keyword)
+    # #1 ACL 过滤：admin 直接放行，普通用户只能看到自己被授权的项目
+    accessible_ids = set(
+        filter_accessible_resource_ids("project", [p["id"] for p in projects], current_user)
+    )
+    filtered = [p for p in projects if p["id"] in accessible_ids]
+    return ok(filtered)
+
+
+@router.post("")
+def create_project(payload: dict[str, Any] = Body(...), request: Request = None, current_user: dict = Depends(get_current_user)) -> dict[str, Any]:
+    if not is_admin(current_user) and str(payload.get("tenant_id") or current_user.get("tenant_id") or "default") != str(current_user.get("tenant_id") or "default"):
+        raise fail(403, "cannot create project in another tenant")
+    payload.setdefault("tenant_id", current_user.get("tenant_id") or "default")
+    payload.setdefault("create_by", current_user.get("id"))
+    store = get_platform_store()
+    try:
+        store.assert_active_tenant(payload["tenant_id"])
+    except ValueError as exc:
+        raise fail(400, str(exc))
+    proj = store.create_project(payload)
+    store.record_audit(
+        action="project.create",
+        actor_id=current_user.get("id"),
+        target_type="project",
+        target_id=proj["id"],
+        tenant_id=proj.get("tenant_id"),
+        detail=f"name={proj.get('name')}",
+    )
+    return ok(proj)
+
+
+@router.get("/{project_id}")
+def get_project(project_id: str, current_user: dict = Depends(get_current_user)) -> dict[str, Any]:
+    # #2 访问控制：普通用户无 read 权限则拒绝
+    if not has_resource_access("project", project_id, current_user, "read"):
+        raise fail(403, "no permission to access this project")
+    try:
+        return ok(get_platform_store().project(project_id))
+    except KeyError:
+        raise fail(404, "project not found")
+
+
+@router.put("/{project_id}")
+def update_project(
+    project_id: str,
+    payload: dict[str, Any] = Body(...),
+    request: Request = None,
+    current_user: dict = Depends(get_current_user),
+) -> dict[str, Any]:
+    if not has_resource_access("project", project_id, current_user, "write"):
+        raise fail(403, "no permission to update this project")
+    store = get_platform_store()
+    try:
+        proj = store.update_project(project_id, payload)
+    except KeyError:
+        raise fail(404, "project not found")
+    store.record_audit(
+        action="project.update",
+        actor_id=current_user.get("id"),
+        target_type="project",
+        target_id=project_id,
+        tenant_id=proj.get("tenant_id"),
+        detail=f"fields={','.join(payload.keys())}",
+    )
+    return ok(proj)
+
+
+@router.post("/{project_id}/archive")
+def archive_project(
+    project_id: str,
+    request: Request = None,
+    current_user: dict = Depends(get_current_user),
+) -> dict[str, Any]:
+    _require_no_pending_approval("project", project_id)
+    pending = _require_approval_or_admin("project", project_id, current_user, f"归档项目 {project_id}", "project.archive")
+    if pending:
+        return pending
+    store = get_platform_store()
+    try:
+        proj = store.archive_project(project_id)
+    except KeyError:
+        raise fail(404, "project not found")
+    store.record_audit(
+        action="project.archive",
+        actor_id=current_user.get("id"),
+        target_type="project",
+        target_id=project_id,
+        tenant_id=proj.get("tenant_id"),
+    )
+    return ok(proj)
+
+
+@router.delete("/{project_id}")
+def delete_project(
+    project_id: str,
+    request: Request = None,
+    current_user: dict = Depends(get_current_user),
+) -> dict[str, Any]:
+    _require_no_pending_approval("project", project_id)
+    pending = _require_approval_or_admin("project", project_id, current_user, f"删除项目 {project_id}", "project.delete")
+    if pending:
+        return pending
+    store = get_platform_store()
+    store.delete_project(project_id)
+    store.record_audit(
+        action="project.delete",
+        actor_id=current_user.get("id"),
+        target_type="project",
+        target_id=project_id,
+    )
+    return ok(None)
+
+
+@router.get("/{project_id}/members")
+def list_members(project_id: str, current_user: dict = Depends(get_current_user)) -> dict[str, Any]:
+    if not has_resource_access("project", project_id, current_user, "read"):
+        raise fail(403, "no permission to access this project")
+    try:
+        return ok(get_platform_store().project_members(project_id))
+    except KeyError:
+        raise fail(404, "project not found")
+
+
+@router.post("/{project_id}/members")
+def add_member(
+    project_id: str,
+    payload: dict[str, Any] = Body(...),
+    request: Request = None,
+    current_user: dict = Depends(get_current_user),
+) -> dict[str, Any]:
+    if not has_resource_access("project", project_id, current_user, "write"):
+        raise fail(403, "no permission to manage members of this project")
+    store = get_platform_store()
+    try:
+        member = store.add_project_member(project_id, payload)
+    except KeyError:
+        raise fail(404, "project not found")
+    store.record_audit(
+        action="project.member.add",
+        actor_id=current_user.get("id"),
+        target_type="project.member",
+        target_id=project_id,
+        detail=f"user_id={payload.get('user_id')},role={payload.get('role')}",
+    )
+    return ok(member)
+
+
+@router.put("/{project_id}/members/{user_id}")
+def update_member(
+    project_id: str,
+    user_id: str,
+    payload: dict[str, Any] = Body(...),
+    request: Request = None,
+    current_user: dict = Depends(get_current_user),
+) -> dict[str, Any]:
+    if not has_resource_access("project", project_id, current_user, "write"):
+        raise fail(403, "no permission to manage members of this project")
+    store = get_platform_store()
+    try:
+        member = store.update_project_member_role(project_id, user_id, payload)
+    except KeyError:
+        raise fail(404, "project or member not found")
+    store.record_audit(
+        action="project.member.update",
+        actor_id=current_user.get("id"),
+        target_type="project.member",
+        target_id=project_id,
+        detail=f"user_id={user_id},role={payload.get('role')}",
+    )
+    return ok(member)
+
+
+@router.delete("/{project_id}/members/{user_id}")
+def remove_member(
+    project_id: str,
+    user_id: str,
+    request: Request = None,
+    current_user: dict = Depends(get_current_user),
+) -> dict[str, Any]:
+    if not has_resource_access("project", project_id, current_user, "write"):
+        raise fail(403, "no permission to manage members of this project")
+    store = get_platform_store()
+    store.remove_project_member(project_id, user_id)
+    store.record_audit(
+        action="project.member.remove",
+        actor_id=_actor(request) if request else None,
+        target_type="project.member",
+        target_id=project_id,
+        detail=f"user_id={user_id}",
+    )
+    return ok(None)

backend/app/modules/resource/__init__.py

@@ -0,0 +1 @@
+"""Resource access control list (ACL) module."""

backend/app/modules/resource/router.py

@@ -0,0 +1,93 @@
+from __future__ import annotations
+
+from fastapi import APIRouter, Body, Request, Depends
+from typing import Any
+
+from app.api.v1.endpoints.platform import ok, fail
+from app.db.platform_store import get_platform_store
+from app.core.auth import (
+    get_current_user,
+    has_resource_access,
+    is_admin,
+    resource_record,
+    resource_tenant_id,
+    user_tenant_ids,
+)
+from app.core.audit import audit_log, AuditActions
+
+router = APIRouter(prefix="/resources", tags=["resource"])
+
+
+def _actor(request: Request, current_user: dict[str, Any]) -> str | None:
+    return str(current_user.get("id") or "") or None
+
+
+@router.get("/{resource_type}/{resource_id}/acl")
+def get_acl(resource_type: str, resource_id: str, current_user: dict = Depends(get_current_user)) -> dict[str, Any]:
+    """查询资源 ACL，返回按主体分组的权限列表。"""
+    if not has_resource_access(resource_type, resource_id, current_user, "read"):
+        raise fail(403, "no permission to access resource ACL")
+    return ok(get_platform_store().resource_acl(resource_type, resource_id))
+
+
+@router.put("/{resource_type}/{resource_id}/acl")
+@audit_log(
+    action=AuditActions.GRANT_ACL,
+    target_type="",
+    detail_template="设置资源授权: {resource_type}/{resource_id}",
+)
+def set_acl(
+    resource_type: str,
+    resource_id: str,
+    payload: dict[str, Any] = Body(...),
+    request: Request = None,
+    current_user: dict = Depends(get_current_user),
+) -> dict[str, Any]:
+    """设置资源 ACL，body: { entries: [{ subject_type, subject_id, permissions: [] }] }"""
+    resource = resource_record(resource_type, resource_id)
+    if not resource and not is_admin(current_user):
+        raise fail(404, "resource not found")
+    if not is_admin(current_user) and not has_resource_access(resource_type, resource_id, current_user, "write"):
+        raise fail(403, "only resource owner or admin can update ACL")
+    entries = payload.get("entries") or []
+    allowed = {"read", "write", "execute", "download", "delete", "admin"}
+    owner_allowed = {"read", "write", "execute", "download"}
+    tenant_id = resource_tenant_id(resource_type, resource) if resource else None
+    tenant_ids = user_tenant_ids(current_user)
+    for entry in entries:
+        if entry.get("principal_type") not in {"user", "role"} or not entry.get("principal_id"):
+            raise fail(400, "invalid ACL principal")
+        permissions = set(entry.get("permissions") or [])
+        if any(permission not in allowed for permission in permissions):
+            raise fail(400, "invalid ACL permission")
+        if not is_admin(current_user) and permissions - owner_allowed:
+            raise fail(403, "resource owners cannot grant delete or admin permission")
+        if entry.get("principal_type") == "user":
+            with get_platform_store().connect() as conn:
+                principal = conn.execute(
+                    "SELECT id, tenant_id, status FROM users WHERE id=?",
+                    (entry["principal_id"],),
+                ).fetchone()
+            if not principal or principal.get("status") != "active":
+                raise fail(400, "ACL user does not exist or is inactive")
+            principal_tenant = str(principal.get("tenant_id") or "default")
+            if not is_admin(current_user) and tenant_id and principal_tenant not in tenant_ids:
+                raise fail(403, "cannot grant resource access across tenants")
+        elif not is_admin(current_user):
+            # Role ACLs are global in the legacy schema and therefore cannot
+            # be safely scoped to one tenant by a normal resource owner.
+            raise fail(403, "only administrators can grant role-based ACLs")
+    result = get_platform_store().set_resource_acl(
+        resource_type,
+        resource_id,
+        entries,
+        granted_by=str(current_user.get("id") or "") or None,
+    )
+    get_platform_store().record_audit(
+        action="resource.acl.set",
+        actor_id=_actor(request, current_user) if request else current_user.get("id"),
+        target_type=resource_type,
+        target_id=resource_id,
+        detail=f"entries={len(entries)}",
+    )
+    return ok(result)

backend/app/modules/retention/__init__.py

@@ -0,0 +1 @@
+"""Retention policy and cleanup module."""

backend/app/modules/retention/router.py

@@ -0,0 +1,77 @@
+from __future__ import annotations
+
+from fastapi import APIRouter, Body, Request, Depends
+from typing import Any
+
+from app.api.v1.endpoints.platform import ok, fail
+from app.db.platform_store import get_platform_store
+from app.core.auth import require_admin
+
+router = APIRouter(prefix="/retention-policies", tags=["retention"])
+
+
+def _actor(request: Request) -> str | None:
+    auth = request.headers.get("Authorization", "")
+    token = auth.replace("Bearer ", "").strip()
+    return token or None
+
+
+@router.get("")
+def list_policies(current_user: dict = Depends(require_admin)) -> dict[str, Any]:
+    return ok(get_platform_store().retention_policies())
+
+
+@router.post("")
+def create_policy(payload: dict[str, Any] = Body(...), request: Request = None, current_user: dict = Depends(require_admin)) -> dict[str, Any]:
+    if not payload.get("name"):
+        raise fail(400, "name 必填")
+    policy = get_platform_store().create_retention_policy(payload)
+    get_platform_store().record_audit(
+        action="retention.create",
+        actor_id=current_user.get("id"),
+        target_type="retention_policy",
+        target_id=policy["id"],
+        detail=f"name={policy.get('name')}",
+    )
+    return ok(policy)
+
+
+@router.get("/{policy_id}")
+def get_policy(policy_id: str, current_user: dict = Depends(require_admin)) -> dict[str, Any]:
+    try:
+        return ok(get_platform_store().retention_policy(policy_id))
+    except KeyError:
+        raise fail(404, "retention policy not found")
+
+
+@router.put("/{policy_id}")
+def update_policy(
+    policy_id: str, payload: dict[str, Any] = Body(...), request: Request = None,
+    current_user: dict = Depends(require_admin),
+) -> dict[str, Any]:
+    store = get_platform_store()
+    try:
+        policy = store.update_retention_policy(policy_id, payload)
+    except KeyError:
+        raise fail(404, "retention policy not found")
+    store.record_audit(
+        action="retention.update",
+        actor_id=current_user.get("id"),
+        target_type="retention_policy",
+        target_id=policy_id,
+        detail=f"fields={','.join(payload.keys())}",
+    )
+    return ok(policy)
+
+
+@router.delete("/{policy_id}")
+def delete_policy(policy_id: str, request: Request = None, current_user: dict = Depends(require_admin)) -> dict[str, Any]:
+    store = get_platform_store()
+    store.delete_retention_policy(policy_id)
+    store.record_audit(
+        action="retention.delete",
+        actor_id=current_user.get("id"),
+        target_type="retention_policy",
+        target_id=policy_id,
+    )
+    return ok({"deleted": policy_id})

backend/app/modules/storage/__init__.py

@@ -0,0 +1 @@
+"""Central object storage integration."""