fix(HEL-482): 开盘前分时回退最近交易日，并接通中枢失败回旧通道

Co-authored-by: Cursor <cursoragent@cursor.com>
Co-authored-by: multica-agent <github@multica.ai>

backend/data/datahub/bridge.py

@@ -21,6 +21,26 @@ from backend.data.providers.tushare_client import TushareClient
 
 LOGGER = logging.getLogger("xiaobai.datahub")
 ShadowSink = Callable[[dict[str, Any]], None]
+
+
+def _usable_intraday_points(rows: list[Any]) -> list[dict[str, Any]]:
+    points: list[dict[str, Any]] = []
+    for row in rows:
+        if not isinstance(row, dict):
+            continue
+        try:
+            close = float(row.get("close") or 0)
+        except (TypeError, ValueError):
+            close = 0.0
+        if close <= 0:
+            continue
+        point = dict(row)
+        if "average" not in point and point.get("avg_price") is not None:
+            point["average"] = point.get("avg_price")
+        points.append(point)
+    return points
+
+
 EMPTY_FAIL_DATASETS = {
     "stocks", "daily", "index_daily", "valuation", "moneyflow", "auction",
     "limit_events", "sector_daily",
@@ -91,6 +111,34 @@ class DatahubBridge:
             self._log_failure("status", exc)
             return None
 
+    def try_intraday(self, code: str) -> dict[str, Any] | None:
+        flags = self.settings.flags("intraday")
+        if not flags.read:
+            return None
+        try:
+            response = self.client.intraday_points(code=code)
+            data = response.data
+            if not isinstance(data, dict):
+                raise DatahubError("EMPTY", "datahub intraday payload invalid")
+            points = _usable_intraday_points(data.get("points") or [])
+            if not points:
+                raise DatahubError("EMPTY", "datahub intraday empty")
+            if (response.meta or {}).get("stale"):
+                raise DatahubError("STALE", "datahub intraday stale")
+            return {
+                "entity_type": str(data.get("entity_type") or "stock"),
+                "identifier": str(data.get("identifier") or code),
+                "name": str(data.get("name") or ""),
+                "code": str(data.get("code") or code),
+                "trade_date": str(data.get("trade_date") or points[-1].get("date") or ""),
+                "previous_close": float(data.get("previous_close") or 0),
+                "points": points,
+                "source": "datahub",
+            }
+        except Exception as exc:
+            self._log_failure("intraday", exc)
+            return None
+
     def query(
         self,
         api_name: str,