feat: redesign workspaces and stabilize screeners

strategy_tracking.py

@@ -21,6 +21,34 @@ class StrategyTrackingService:
             user_id, run_id, selection_date, strategy_name, candidates
         )
 
+    def add_candidate(self, user_id: int, run_id: int, code: str) -> dict[str, Any]:
+        run = self.database.get_screener_run(user_id, run_id)
+        if not run:
+            raise ValueError("选股结果不存在或不属于当前账号。")
+        normalized_code = str(code or "").strip().split(".")[0]
+        candidate = next(
+            (
+                item for item in run.get("candidates", [])
+                if str(item.get("code") or item.get("ts_code") or "").split(".")[0]
+                == normalized_code
+            ),
+            None,
+        )
+        if not candidate:
+            raise ValueError("该股票不在本次选股结果中。")
+        added = self.record_run(
+            user_id,
+            run_id,
+            str(run.get("meta", {}).get("trade_date") or ""),
+            str(run.get("strategy_name") or "未命名策略"),
+            [candidate],
+        )
+        return {"added": added, "tracking": self.list_tracking(user_id)}
+
+    def remove_candidate(self, user_id: int, track_id: int) -> dict[str, Any]:
+        deleted = self.database.delete_strategy_track(user_id, track_id)
+        return {"deleted": deleted, "tracking": self.list_tracking(user_id)}
+
     def list_tracking(self, user_id: int, limit_batches: int = 12) -> dict[str, Any]:
         tracks = self.database.list_strategy_tracks(user_id, limit_batches)
         if not tracks: