fix: include completed sub agents in overview

modules/sub_agent_manager.py

@@ -566,11 +566,9 @@ class SubAgentManager:
         """返回子智能体任务概览，用于前端展示。"""
         overview: List[Dict[str, Any]] = []
         for task_id, task in self.tasks.items():
-            status = task.get("status")
-            if status not in {"pending", "running"}:
-                continue
             if conversation_id and task.get("conversation_id") != conversation_id:
                 continue
+
             snapshot = {
                 "task_id": task_id,
                 "agent_id": task.get("agent_id"),
@@ -585,7 +583,8 @@ class SubAgentManager:
                 "conversation_id": task.get("conversation_id"),
                 "sub_conversation_id": task.get("sub_conversation_id"),
             }
-            # 对于运行中的任务，尝试获取最新状态
+
+            # 运行中的任务尝试同步远端最新状态
             if snapshot["status"] not in TERMINAL_STATUSES:
                 remote = self._call_service("GET", f"/tasks/{task_id}", timeout=5)
                 if remote.get("success"):
@@ -593,5 +592,13 @@ class SubAgentManager:
                     snapshot["remote_message"] = remote.get("message")
                     snapshot["last_tool"] = remote.get("last_tool")
                     task["last_tool"] = snapshot["last_tool"]
+            else:
+                # 已结束的任务带上最终结果/系统消息，方便前端展示
+                final_result = task.get("final_result") or {}
+                snapshot["final_message"] = final_result.get("system_message") or final_result.get("message")
+                snapshot["success"] = final_result.get("success")
+
             overview.append(snapshot)
+
+        overview.sort(key=lambda item: item.get("created_at") or 0, reverse=True)
         return overview