fix(HEL-164): 拒绝缓存不完整涨停快照

Co-authored-by: multica-agent <github@multica.ai>

backend/jobs/service.py

@@ -7,6 +7,16 @@ from datetime import date
 from backend.bootstrap.config import normalize_date
 
 
+def _verified_dashboard_result(dashboard: dict[str, object]) -> dict[str, object]:
+    meta = dashboard.get("meta") or {}
+    if isinstance(meta, dict) and meta.get("carried_forward"):
+        return {
+            "status": "failed",
+            "error": str(meta.get("notice") or "未获取到所选日期的最新行情"),
+        }
+    return dashboard
+
+
 class JobServiceMixin:
     def start_background_jobs(self) -> threading.Thread:
         return self.jobs.start_scheduler(
@@ -26,7 +36,7 @@ class JobServiceMixin:
         started = self.jobs.submit(
             "market.refresh",
             key,
-            lambda: self.sync_dashboard(normalized),
+            lambda: _verified_dashboard_result(self.sync_dashboard(normalized)),
             {"trade_date": normalized, "trigger": "administrator"},
         )
         return {"started": started, "job_key": key if started else ""}