chore: 移除websocket相关的调试打印日志

去掉了开发阶段用于调试的控制台打印输出，清理冗余调试代码

flutter_asr_client/lib/pages/recording/notifiers/recording_notifier.dart

@@ -238,7 +238,6 @@ final class RecordingNotifier extends AutoDisposeAsyncNotifier<RecordingState> {
 
   void _listenToWebSocketMessages() {
     _webSocketService.messageStream.listen((message) {
-      print('[ws] msg: ${message.runtimeType} ${message is TranscriptMessage ? "text='${message.text}'" : ""}');
       switch (message) {
         case ConnectedMessage():
           _updateState((s) => s.copyWith(isConnected: true));

flutter_asr_client/lib/services/websocket_service.dart

@@ -76,7 +76,6 @@ final class WebSocketServiceImpl implements WebSocketService {
       _channel!.stream.listen(
         (event) {
           if (event is String) {
-            print('[ws-raw] $event');
             final message = ServerMessage.fromJsonString(event);
             _messageController.add(message);
           }