fix(HEL-164): 拒绝缓存不完整涨停快照

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

tests/test_realtime_dashboard.py

@@ -111,6 +111,25 @@ class RealtimeDashboardTests(unittest.TestCase):
         self.assertEqual(quote["amount_billion"], 3.0)
         self.assertAlmostEqual(quote["turnover_rate"], 0.01)
 
+    def test_close_dashboard_marks_official_limit_data(self):
+        dashboard = self.client.dashboard("20260720")
+
+        self.assertEqual(dashboard["meta"]["limit_data_source"], "official")
+
+    def test_close_dashboard_marks_derived_limit_data_as_incomplete(self):
+        original_query = self.client.query
+
+        def query(api_name, params=None, fields=""):
+            if api_name == "limit_list_d":
+                return []
+            return original_query(api_name, params, fields)
+
+        self.client.query = query
+        dashboard = self.client.dashboard("20260720")
+
+        self.assertEqual(dashboard["meta"]["limit_data_source"], "derived")
+        self.assertIn("日线数据推算", dashboard["meta"]["notice"])
+
 
 if __name__ == "__main__":
     unittest.main()