fix: 账号截图开关持久化与状态推送优化

services/tasks.py

@@ -180,6 +180,23 @@ class TaskScheduler:
 
             self._cond.notify_all()
 
+    def get_queue_state_snapshot(self) -> dict:
+        """获取调度器队列/运行状态快照（用于前端展示/监控）。"""
+        with self._cond:
+            pending_tasks = [t for t in self._pending_by_account.values() if t and not t.canceled]
+            pending_tasks.sort(key=lambda t: (0 if t.is_vip else 1, t.submitted_at, t.seq))
+
+            positions = {}
+            for idx, t in enumerate(pending_tasks):
+                positions[t.account_id] = {"queue_position": idx + 1, "queue_ahead": idx, "is_vip": bool(t.is_vip)}
+
+            return {
+                "pending_total": len(pending_tasks),
+                "running_total": int(self._running_global),
+                "running_by_user": dict(self._running_by_user),
+                "positions": positions,
+            }
+
     def submit_task(
         self,
         user_id: int,