feat: 新增 compute_gateway、compute_poller、agent 模块，重构前端 dist

- 新增 backend/app/modules/compute_gateway（client/sync）计算网关模块
- 新增 backend/app/workers/compute_poller 计算轮询 worker
- 新增 compute/agent/process_manager 进程管理器
- 新增 scripts/ 脚本目录
- 更新 Docker 部署配置（app/compute/nginx）
- 更新后端平台 API、数据库 SQL、core 配置
- 更新前端多个视图组件及 API 模块
- 重构 frontend/dist 构建产物（新 hash）
- 更新多项文档

Co-Authored-By: Claude <noreply@anthropic.com>

backend/app/modules/compute_gateway/sync.py

@@ -0,0 +1,27 @@
+from __future__ import annotations
+
+from typing import Any
+
+from app.db.platform_store import get_platform_store
+from app.modules.compute_gateway.client import ComputeNodeClient
+
+
+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)
+
+
+async def poll_compute_jobs_once() -> dict[str, Any]:
+    store = get_platform_store()
+    synced: list[dict[str, Any]] = []
+    failed: list[dict[str, str]] = []
+    for task in store.running_compute_tasks():
+        node = _node_for_task(task)
+        if not node:
+            failed.append({"task_id": task["id"], "error": "compute node not found"})
+            continue
+        try:
+            job = await ComputeNodeClient(node["api_base_url"]).get_job(task["compute_job_id"])
+            synced.append(store.apply_compute_job(task["id"], job))
+        except Exception as exc:  # noqa: BLE001 - keep polling other jobs
+            failed.append({"task_id": task["id"], "error": str(exc)})
+    return {"synced": len(synced), "failed": failed, "items": synced}