Update app.py

app.py

@@ -87,7 +87,7 @@ class ProxyClient:
                 
         except requests.exceptions.RequestException as e:
             logger.error(f"Request failed: {str(e)}")
-            raise Exception(f"Failed to connect to proxy server: {str(e)}")
+            raise Exception(f"Failed to connect to server: {str(e)}")
     
     def _parse_stream_response(self, response) -> Generator[ChunkObject, None, None]:
         """解析流式响应"""