Fix hub AI save: background PM2 restart after JSON response.

Co-authored-by: Cursor <cursoragent@cursor.com>

manual_trading_hub/hub.py

@@ -110,7 +110,7 @@ from env_load import load_hub_dotenv
 load_hub_dotenv()
 
 import httpx
-from fastapi import Body, FastAPI, File, Form, HTTPException, Request, UploadFile
+from fastapi import BackgroundTasks, Body, FastAPI, File, Form, HTTPException, Request, UploadFile
 from fastapi.responses import FileResponse, HTMLResponse, JSONResponse
 from fastapi.staticfiles import StaticFiles
 from pydantic import BaseModel, Field
@@ -1706,27 +1706,21 @@ def api_get_ai_env(request: Request):
 
 
 @app.post("/api/settings/ai-env")
-def api_save_ai_env(request: Request, body: HubAiEnvBody):
+def api_save_ai_env(request: Request, body: HubAiEnvBody, background_tasks: BackgroundTasks):
     _require_hub_logged_in(request)
     from hub_env_lib import get_hub_ai_env_payload, restart_all_pm2, save_hub_ai_env
 
     result = save_hub_ai_env(body.values or {})
     if not result.get("ok"):
         raise HTTPException(status_code=400, detail="; ".join(result.get("errors") or ["保存失败"]))
-    restart_result = None
-    if body.restart and result.get("restart_required"):
-        restart_result = restart_all_pm2()
-        if not restart_result.get("ok"):
-            raise HTTPException(
-                status_code=500,
-                detail="保存成功但 PM2 重启失败，请手动 restart",
-            )
     payload = get_hub_ai_env_payload()
+    restart_required = bool(body.restart and result.get("restart_required"))
+    if restart_required:
+        background_tasks.add_task(restart_all_pm2)
     return {
         "ok": True,
         "changed": result.get("changed") or {},
-        "restart_required": bool(result.get("restart_required")),
-        "restart": restart_result,
+        "restart_required": restart_required,
         "sync_status": payload.get("sync_status"),
     }