fix: Обработка отключения G2O сервера

src/pyg2o/server.py

@@ -130,8 +130,11 @@ class Server:
                     cls._logger.exception(f'Ошибка декодирования JSON: {e}')
         except WebSocketDisconnect:
             cls._logger.info('WebSocket клиент отключился')
-            playerid = next((key for key, values in cls._registered_clients.items() if connection in values), None)
-            if playerid is not None: cls._registered_clients[playerid].remove(connection)
+            if connection == cls._server_connection:
+                cls._server_connection = None
+            else:
+                playerid = next((key for key, values in cls._registered_clients.items() if connection in values), None)
+                if playerid is not None: cls._registered_clients[playerid].remove(connection)
         except WebSocketException as e:
             cls._logger.exception(f'Ошибка WebSocket подключения: {e}')