refactor(selection): replace concept sector filter with sub-industry

- pin the selection sector vocabulary to industry: the /sectors endpoint
  no longer accepts sector_type, and the port, adapter, and use case all
  resolve counts and member codes with sector_type="industry"
- relabel the results filter to 细分行业 and drop concept-type plumbing
  from the frontend API, query keys, and types
- show only 细分行业 in the signal detail panel; remove the concept-board
  chips and keep the snapshot-date tooltip on the industry line
- update backend and frontend tests to the industry vocabulary and record
  the revised scope in the task PRD

zhixing-server/tests/test_selection_http.py

@@ -59,7 +59,6 @@ class FakeSelectionService:
         self.executed = False
         self.mode = "ok"
         self.last_query: SelectionResultQuery | None = None
-        self.sector_type_requested: str | None = None
 
     def prepare(
         self,
@@ -117,16 +116,13 @@ class FakeSelectionService:
         self,
         strategy: str,
         target_trade_date: date | None = None,
-        *,
-        sector_type: str = "concept",
     ) -> SelectionSectorAggregates | None:
-        self.sector_type_requested = sector_type
         if self.run is None:
             return None
         return SelectionSectorAggregates(
             run=self.run,
             snapshot_trade_date=self.run.target_trade_date,
-            sector_type=sector_type,
+            sector_type="industry",
             sectors=self.sectors,
         )
 
@@ -493,7 +489,7 @@ def test_sectors_returns_aggregated_counts_desc() -> None:
         "run_id": "run-http",
         "status": "success",
         "snapshot_trade_date": "2026-08-08",
-        "sector_type": "concept",
+        "sector_type": "industry",
         "sectors": [
             {"sector_code": "BK0001.DC", "sector_name": "机器人", "stock_count": 3},
             {"sector_code": "BK0003.DC", "sector_name": "数字经济", "stock_count": 2},
@@ -501,19 +497,6 @@ def test_sectors_returns_aggregated_counts_desc() -> None:
     }
 
 
-def test_sectors_forwards_sector_type() -> None:
-    service = FakeSelectionService(_run("run-http", "success"))
-
-    response = _client(service).get(
-        "/api/v1/selection/sectors",
-        params={"sector_type": "industry"},
-    )
-
-    assert response.status_code == 200
-    assert service.sector_type_requested == "industry"
-    assert response.json()["sector_type"] == "industry"
-
-
 def test_sectors_without_run_returns_no_data() -> None:
     response = _client(FakeSelectionService()).get("/api/v1/selection/sectors")
 
@@ -524,20 +507,11 @@ def test_sectors_without_run_returns_no_data() -> None:
         "run_id": None,
         "status": "no_data",
         "snapshot_trade_date": None,
-        "sector_type": "concept",
+        "sector_type": "industry",
         "sectors": [],
     }
 
 
-def test_sectors_rejects_unknown_sector_type() -> None:
-    response = _client(FakeSelectionService()).get(
-        "/api/v1/selection/sectors",
-        params={"sector_type": "macro"},
-    )
-
-    assert response.status_code == 422
-
-
 def test_chart_returns_bounded_qfq_contract() -> None:
     chart_service = FakeChartService()