agent功能开发增加MCP后端

mcp_server.py

@@ -125,10 +125,15 @@ class AgentResponse(BaseModel):
     final_summary: Optional[str] = None
     metadata: Optional[Dict[str, Any]] = None
 
+class ConversationMessage(BaseModel):
+    """对话历史消息"""
+    isUser: bool
+    content: str
+
 class AgentChatRequest(BaseModel):
     """聊天请求"""
     message: str
-    conversation_history: List[Dict[str, str]] = []
+    conversation_history: List[ConversationMessage] = []
 
 # ==================== MCP工具定义 ====================