fix(HEL-494): 数据中枢独占调度，主网站不再回退旧接口

主网站只向中枢要业务数据；来源选择、切源、补数全部在中枢内部完成，失败不再走东财/腾讯/Tushare 保底。

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

tests/test_ifind_features.py

@@ -12,6 +12,20 @@ from backend.features.market.insights import MarketInsightsService
 from server import DashboardService
 
 
+class _FakeDailyHub:
+    def __init__(self, rows: list) -> None:
+        self.rows = rows
+
+    def try_daily_chart(self, code, end_date, limit, dataset="daily"):
+        return list(self.rows)
+
+    def try_quotes(self, codes):
+        return None
+
+    def try_index_quotes(self):
+        return None
+
+
 class FakeIfind:
     configured = True
 
@@ -128,13 +142,50 @@ class IfindFeatureTests(unittest.TestCase):
             self.assertEqual(database.list_wencai_saved_queries(second["id"]), [])
 
     def test_ifind_daily_chart_normalizes_change(self):
-        client = MarketChartClient(FakeIfind(), EastmoneyChartClient())
+        hub = _FakeDailyHub(
+            [
+                {
+                    "trade_date": "2026-07-27",
+                    "open": 10,
+                    "high": 10.5,
+                    "low": 9.8,
+                    "close": 10.2,
+                    "volume": 100,
+                    "amount_billion": 0.01,
+                    "change": 0,
+                },
+                {
+                    "trade_date": "2026-07-28",
+                    "open": 10.2,
+                    "high": 10.8,
+                    "low": 10.1,
+                    "close": 10.5,
+                    "volume": 120,
+                    "amount_billion": 0.012,
+                    "change": 2.9412,
+                },
+            ]
+        )
+        client = MarketChartClient(FakeIfind(), EastmoneyChartClient(), hub)
         rows = client.stock_daily("000001", "20260728")
         self.assertEqual(rows[-1]["trade_date"], "2026-07-28")
         self.assertAlmostEqual(rows[-1]["change"], 2.9412, places=4)
 
     def test_ifind_daily_chart_keeps_last_traded_bar_before_market_open(self):
-        client = MarketChartClient(FakeIfindStalePreopen(), EastmoneyChartClient())
+        hub = _FakeDailyHub(
+            [
+                {
+                    "trade_date": "2026-07-28",
+                    "open": 10.2,
+                    "high": 10.8,
+                    "low": 10.1,
+                    "close": 10.5,
+                    "volume": 120,
+                    "amount_billion": 0.012,
+                }
+            ]
+        )
+        client = MarketChartClient(FakeIfindStalePreopen(), EastmoneyChartClient(), hub)
         with patch("backend.features.market.charts.datetime", FixedPreopenDatetime):
             rows = client.stock_daily("000001", "20260729")