fix: skip sub-agent notify for blocking run

core/main_terminal_parts/tools_execution.py

@@ -1,5 +1,6 @@
 import asyncio
 import json
+import time
 from datetime import datetime
 from pathlib import Path
 from typing import Any, Dict, List, Optional, Set
@@ -641,6 +642,17 @@ class MainTerminalToolsExecutionMixin:
                             )
                             # 合并结果
                             result.update(wait_result)
+                            # 阻塞式执行不需要额外插入 system 消息
+                            result.pop("system_message", None)
+                            # 标记已通知，避免后续轮询再插入 system 消息
+                            try:
+                                task = self.sub_agent_manager.tasks.get(task_id)
+                                if isinstance(task, dict):
+                                    task["notified"] = True
+                                    task["updated_at"] = time.time()
+                                    self.sub_agent_manager._save_state()
+                            except Exception:
+                                pass
 
                     elif tool_name == "terminate_sub_agent":
                         result = self.sub_agent_manager.terminate_sub_agent(