chore/ 删除无用文件

api/app/agents/chat/conversation_agent.py

@@ -2,6 +2,7 @@
 对话 Agent：Facade，内部委托 ChatOrchestrator + ProfileAgent + InterviewAgent
 保留原有对外 API，供 router 等调用方兼容使用
 """
+
 from datetime import datetime
 from typing import Any, Dict, List, Optional
 
@@ -119,7 +120,9 @@ class ConversationAgent:
         )
         return responses[0] if responses else ""
 
-    def detect_stage(self, conversation_id: str, user_message: str) -> ConversationStage:
+    def detect_stage(
+        self, conversation_id: str, user_message: str
+    ) -> ConversationStage:
         """根据关键词检测用户阶段（兼容 API）"""
         detected = self._orchestrator.detect_user_stage(user_message)
         if detected == "childhood":