agent功能开发增加MCP后端

mcp_server.py

@@ -1549,13 +1549,23 @@ async def agent_chat(request: AgentChatRequest):
     logger.info(f"Agent chat: {request.message} (user: {request.user_id})")
 
     # ==================== 权限检查 ====================
-    # 仅允许 max 用户使用
-    if request.user_id != "max":
+    # 仅允许 max 用户使用（支持多种格式：字符串 "max"、数字 1、或 nickname 为 "max"）
+    is_max_user = (
+        request.user_id == "max" or
+        request.user_id == "1" or
+        request.user_id == 1 or
+        request.user_nickname == "max"
+    )
+
+    if not is_max_user:
+        logger.warning(f"权限检查失败 - user_id: {request.user_id}, nickname: {request.user_nickname}")
         raise HTTPException(
             status_code=403,
             detail="很抱歉，「价小前投研」功能目前仅对特定用户开放。如需使用，请联系管理员。"
         )
 
+    logger.info(f"权限检查通过 - user_id: {request.user_id}, nickname: {request.user_nickname}")
+
     # ==================== 会话管理 ====================
     # 如果没有提供 session_id，创建新会话
     session_id = request.session_id or str(uuid.uuid4())