fix(hub): prevent monitor board stuck on slow aggregate polling

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

manual_trading_hub/hub.py

@@ -72,6 +72,7 @@ DIR = Path(__file__).resolve().parent
 HUB_BUILD = "20260528-hub-market"
 HUB_AGENT_TIMEOUT = float(os.getenv("HUB_AGENT_TIMEOUT", "8"))
 HUB_FLASK_TIMEOUT = float(os.getenv("HUB_FLASK_TIMEOUT", "10"))
+HUB_BOARD_TIMEOUT = float(os.getenv("HUB_BOARD_TIMEOUT", "45"))
 _board_key_prices_raw = (os.getenv("HUB_BOARD_KEY_PRICES", "true") or "").strip().lower()
 HUB_BOARD_KEY_PRICES = _board_key_prices_raw in ("1", "true", "yes", "on")
 
@@ -748,8 +749,7 @@ async def _assemble_board_row(
     }
 
 
-@app.get("/api/monitor/board")
-async def api_monitor_board():
+async def _build_monitor_board_payload() -> dict:
     exchanges = enabled_exchanges()
     async with httpx.AsyncClient() as client:
         agent_rows = await asyncio.gather(
@@ -767,6 +767,28 @@ async def api_monitor_board():
     }
 
 
+@app.get("/api/monitor/board")
+async def api_monitor_board():
+    try:
+        return await asyncio.wait_for(_build_monitor_board_payload(), timeout=HUB_BOARD_TIMEOUT)
+    except asyncio.TimeoutError:
+        return JSONResponse(
+            {
+                "ok": False,
+                "rows": [],
+                "error": "board_timeout",
+                "msg": (
+                    f"监控聚合超过 {int(HUB_BOARD_TIMEOUT)} 秒。"
+                    "请检查子代理/Flask，或设 HUB_BOARD_KEY_PRICES=false、缩短 HUB_FLASK_TIMEOUT"
+                ),
+                "updated_at": __import__("datetime").datetime.now().isoformat(
+                    timespec="seconds"
+                ),
+            },
+            status_code=504,
+        )
+
+
 def _require_hub_logged_in(request: Request) -> None:
     if password_required() and not validate_session_token(request.cookies.get(SESSION_COOKIE)):
         raise HTTPException(status_code=401, detail="未登录中控")