rebuild(stage-7): deliver ladder and sector rotation

next/tests/test_market_data.py

@@ -314,6 +314,10 @@ def test_market_snapshot_units_and_yesterday_outcomes_are_deterministic() -> Non
     )
     assert snapshot["overview"]["amount"] == 500_000
     assert snapshot["broken"][0]["distance_to_limit"] == 20
+    assert snapshot["ladders"][0]["level"] == 2
+    assert snapshot["ladders"][0]["stocks"][0]["code"] == "000001"
+    assert snapshot["sector_rotation"][0]["name"] == "测试行业"
+    assert snapshot["sector_rotation"][0]["delta"] == -4
     assert [row["outcome"] for row in snapshot["yesterday_limits"]] == [
         "晋级",
         "炸板",
@@ -336,6 +340,43 @@ def test_market_snapshot_units_and_yesterday_outcomes_are_deterministic() -> Non
     }
 
 
+def test_sector_members_are_normalized_and_persistently_cached(tmp_path) -> None:
+    database = Database(tmp_path / "members.db")
+    MigrationRunner(database).upgrade(MIGRATIONS)
+    repository = MarketRepository()
+    provider = TushareProvider("test-token")
+    calls = 0
+
+    def members(*_):
+        nonlocal calls
+        calls += 1
+        return calculation_result(
+            [
+                {
+                    "sector_code": "801082.SI",
+                    "sector_name": "元件",
+                    "ts_code": "002141.SZ",
+                    "name": "贤丰控股",
+                    "change": 3.2,
+                    "open": 4.1,
+                    "close": 4.3,
+                    "amount": 123_000_000,
+                    "quoted": True,
+                }
+            ]
+        )
+
+    provider.sector_members = members
+    market = DataGateway(database, repository, (provider,), DataSourcePolicy())
+    first = market.sector_members("2026-07-29", "元件", "002141.SZ")
+    second = market.sector_members("2026-07-29", "元件", "002141.SZ")
+
+    assert calls == 1
+    assert first == second
+    assert first["items"][0]["code"] == "002141"
+    assert first["quoted_count"] == 1
+
+
 def test_sentiment_has_all_weighted_components_and_extreme_risk_cap() -> None:
     snapshot = {
         "overview": {
@@ -401,7 +442,11 @@ def test_incomplete_daily_snapshot_is_rejected_without_overwriting(tmp_path) ->
         "previous_limit_up": calculation_result([]),
         "price_limits": calculation_result([]),
     }
-    service = MarketSnapshotService(database, repository, provider)
+    service = MarketSnapshotService(
+        database,
+        repository,
+        DataGateway(database, repository, (provider,), DataSourcePolicy()),
+    )
     with pytest.raises(SnapshotSyncError, match="覆盖率"):
         service.sync("2026-07-29", datetime(2026, 7, 30, 16, tzinfo=SHANGHAI))
     with database.read() as connection: