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/workers/compute_poller.py

@@ -0,0 +1,31 @@
+from __future__ import annotations
+
+import asyncio
+
+from app.core.config import get_settings
+from app.core.logging import get_logger
+from app.modules.compute_gateway.sync import poll_compute_jobs_once
+
+
+logger = get_logger(__name__)
+
+
+async def run_compute_poller() -> None:
+    settings = get_settings()
+    if settings.compute_mode == "simulator" or settings.compute_status_sync_mode != "polling":
+        logger.info("compute poller disabled", extra={"compute_mode": settings.compute_mode})
+        return
+
+    interval = max(3, settings.compute_poll_interval_seconds)
+    logger.info("compute poller started", extra={"interval_seconds": interval})
+    while True:
+        try:
+            result = await poll_compute_jobs_once()
+            if result["synced"] or result["failed"]:
+                logger.info("compute jobs polled", extra={"result": result})
+        except asyncio.CancelledError:
+            logger.info("compute poller stopped")
+            raise
+        except Exception as exc:  # noqa: BLE001 - keep background polling alive
+            logger.exception("compute poller failed", extra={"error": str(exc)})
+        await asyncio.sleep(interval)