fix(HEL-356): harden realtime quote completeness

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

backend/data/providers/tushare_dashboard.py

@@ -400,6 +400,10 @@ class DashboardMixin:
             market_date,
             _number(row.get("vol")) / 100,
         )
+        trade_time = str(row.get("trade_time") or row.get("quote_time") or "")
+        trade_date = str(row.get("quote_date") or "").replace("-", "")[:8]
+        if not trade_date and trade_time:
+            trade_date = trade_time[:10].replace("-", "")
         return {
             "code": ts_code.split(".")[0],
             "ts_code": ts_code,
@@ -425,6 +429,8 @@ class DashboardMixin:
             "capital_trade_date": str(capital.get("trade_date") or ""),
             "turnover_source": "rt_volume/latest_float_share" if float_share else "unavailable",
             "data_source": str(row.get("source") or "tushare"),
+            "trade_date": trade_date,
+            "trade_time": trade_time,
             "realtime": True,
         }