通话时候，固定一种语言

lib/modules/translation/controllers/translation_controller.dart

@@ -128,6 +128,8 @@ class TranslationController extends GetxController with WidgetsBindingObserver {
 
     if (mode == 'call') {
       await _initializeCallModeTranslationService();
+    } else {
+      _reinitializeAsrService();
     }
   }
 
@@ -454,6 +456,19 @@ class TranslationController extends GetxController with WidgetsBindingObserver {
   Future<void> _initializeCallModeTranslationService() async {
     try {
       Logger.info('开始初始化通话模式语音翻译服务');
+
+      // 初始化 ASR 服务时，明确指定需要支持的语言
+      final List<String> asrSupportedLanguages = [targetLanguageCode.value];
+      Logger.info('初始化ASR服务，支持语言: $asrSupportedLanguages');
+
+      await _asrService.initialize(supportedLanguages: asrSupportedLanguages);
+
+      // 获取识别事件流
+      var recognitionStream = await _asrService.recognizeCallback();
+      _recognitionSubscription?.cancel();
+      _recognitionSubscription =
+          recognitionStream.listen(_handleRecognitionEvent);
+
       final List<String> callModeLanguages = [
         sourceLanguageCode.value,
         targetLanguageCode.value