fix(HEL-494): 切断网站生产装配外源直连，iFinD 与实时观察改走中枢

生产 gateway 不再实例化 iFinD、东财图和免费实时聚合器；问财与竞价快照作为中枢内部数据源。全站阻断外源测试覆盖日K、报价、图表、问财和竞价快照。

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

backend/features/market/charts.py

@@ -14,7 +14,7 @@ from threading import Lock
 from typing import Any, ClassVar
 
 from backend.bootstrap.config import tushare_code as _stock_market_code
-from backend.data.providers.ifind_client import IfindError, IfindHttpClient
+from backend.data.providers.ifind_client import IfindError
 
 LOGGER = logging.getLogger("xiaobai.charts")
 
@@ -42,17 +42,12 @@ INDEX_SECIDS = {
 
 
 class MarketChartClient:
-    """Prefer iFinD for display charts and retain Eastmoney as a last resort."""
+    """Display charts are served by the data hub only."""
 
-    def __init__(
-        self,
-        ifind: IfindHttpClient,
-        fallback: "EastmoneyChartClient",
-        datahub: Any = None,
-    ) -> None:
-        self.ifind = ifind
-        self.fallback = fallback
+    def __init__(self, datahub: Any = None) -> None:
         self.datahub = datahub
+        self.ifind = None
+        self.fallback = None
 
     def stock_intraday(self, code: str) -> dict[str, Any]:
         normalized = str(code or "").strip()
@@ -235,7 +230,7 @@ class MarketChartClient:
         identifier: str,
         name: str = "",
     ) -> dict[str, Any]:
-        if not self.ifind.configured:
+        if not self.ifind or not self.ifind.configured:
             raise ChartDataError("iFinD is not configured")
         now = datetime.now().astimezone()
         rows: list[dict[str, Any]] = []
@@ -272,7 +267,7 @@ class MarketChartClient:
     def _ifind_daily(
         self, ifind_code: str, end_date: str, limit: int
     ) -> list[dict[str, Any]]:
-        if not self.ifind.configured:
+        if not self.ifind or not self.ifind.configured:
             raise ChartDataError("iFinD is not configured")
         compact_end = str(end_date or "").replace("-", "")
         if not re.fullmatch(r"\d{8}", compact_end):
@@ -377,6 +372,8 @@ class MarketChartClient:
         return normalized[-max(1, int(limit)):]
 
     def _previous_close(self, code: str, trade_date: str, fallback: float) -> float:
+        if not self.ifind:
+            return fallback
         today = datetime.now().astimezone().date().isoformat()
         if trade_date == today:
             try: