update:1.更新mcp插件功能，目前只支持remote调用

backend/app/api/settings.py

@@ -359,7 +359,10 @@ async def test_api_connection(data: ApiTestRequest):
         
         logger.info(f"✅ API 测试成功")
         logger.info(f"  - 响应时间: {response_time}ms")
-        logger.info(f"  - 响应内容: {response[:100] if response else 'N/A'}")
+        
+        # 安全地处理响应内容（确保是字符串）
+        response_str = str(response) if response else 'N/A'
+        logger.info(f"  - 响应内容: {response_str[:100]}")
         
         return {
             "success": True,
@@ -367,7 +370,7 @@ async def test_api_connection(data: ApiTestRequest):
             "response_time_ms": response_time,
             "provider": provider,
             "model": llm_model,
-            "response_preview": response[:100] if response and len(response) > 100 else response,
+            "response_preview": response_str[:100] if len(response_str) > 100 else response_str,
             "details": {
                 "api_available": True,
                 "model_accessible": True,