fix(BleManager): 修复编解码器状态管理问题

添加等待状态标志位来正确处理编解码器开关操作，避免状态更新混乱
同时优化翻译控制器中的日志标记和历史记录判空逻辑

lib/data/services/ble_manager.dart

@@ -202,6 +202,8 @@ class BleManager extends GetxService {
   final _isCodecActive = false.obs;
   bool get isCodecActive => _isCodecActive.value;
   RxBool get isCodecActiveRx => _isCodecActive;
+  bool _awaitingCodecOpen = false; //是否正在等待编码器打开的成功应答
+  bool _awaitingCodecClose = false; //是否正在等待编码器关闭的成功应答
 
   // 订阅
   StreamSubscription<dynamic>? _statusSubscription;
@@ -267,7 +269,9 @@ class BleManager extends GetxService {
                   state == BleConnectionState.error) {
                 Logger.info('lxm--BLE设备已断开或发生错误');
                 _isConnected.value = false;
-                // 更新设备信息Add commentMore actions
+                _awaitingCodecOpen = false;
+                _awaitingCodecClose = false;
+                _isCodecActive.value = false;
                 Logger.info('lxm--断开连接时重置设备信息为0');
                 _updateDeviceInfoIfNeeded(
                   batteryLevel: 0,
@@ -376,7 +380,16 @@ class BleManager extends GetxService {
         print(" CONTROL_CODEC: $commandId,$data");
 
         final bool codecSuccess = _isCodecControlSuccess(data);
-        _isCodecActive.value = codecSuccess; // 更新编解码器状态
+        if (_awaitingCodecOpen) {
+          //如果正在等待打开编解码器
+          _isCodecActive.value = codecSuccess; // 只在等待打开时更新状态
+          _awaitingCodecOpen = false;
+        } else if (_awaitingCodecClose) {
+          if (codecSuccess) {
+            _isCodecActive.value = false;
+          }
+          _awaitingCodecClose = false;
+        }
 
         if (codecSuccess) {
           print("lxm--编解码控制成功 (rawData 第二字节非 0)");
@@ -991,19 +1004,27 @@ class BleManager extends GetxService {
   /// 打开解码器
   Future<bool> openDecoder() async {
     try {
+      _awaitingCodecOpen = true;
+      _awaitingCodecClose = false;
+      _isCodecActive.value = false;
       return await _bleService.openDecoder();
     } catch (e) {
       Logger.error('打开解码器失败: ${e.toString()}');
+      _awaitingCodecOpen = false;
       return false;
     }
   }
 
-  /// 打开解码器
+  /// 打开A2DP解码器
   Future<bool> openA2DPDecoder() async {
     try {
+      _awaitingCodecOpen = true;
+      _awaitingCodecClose = false;
+      _isCodecActive.value = false;
       return await _bleService.openA2DPDecoder();
     } catch (e) {
       Logger.error('打开解码器失败: ${e.toString()}');
+      _awaitingCodecOpen = false;
       return false;
     }
   }
@@ -1021,9 +1042,13 @@ class BleManager extends GetxService {
   /// 关闭编解码器
   Future<bool> closeCodec() async {
     try {
+      _awaitingCodecOpen = false;
+      _awaitingCodecClose = true;
+      _isCodecActive.value = false;
       return await _bleService.closeCodec();
     } catch (e) {
       Logger.error('关闭编解码器失败: ${e.toString()}');
+      _awaitingCodecClose = false;
       return false;
     }
   }

lib/modules/translation/controllers/translation_controller.dart

@@ -1008,7 +1008,7 @@ class TranslationController extends GetxController with WidgetsBindingObserver {
         if (event.text.isEmpty) break;
         //通话模式下：己方语言即为源语言，无需判断
         detectedLanguageCode = sourceLanguageCode.value;
-        Logger.info("处理己方识别完成:${event.text}");
+        Logger.info("lxm---处理己方识别完成:${event.text}");
         handleFinalResult(event.text);
         break;
 
@@ -1126,10 +1126,11 @@ class TranslationController extends GetxController with WidgetsBindingObserver {
   /// 处理最终识别结果
   /// [text] 识别的文本
   Future<void> handleFinalResult(String text) async {
-    if (text.isEmpty || translationHistory.isEmpty) return;
+    if (text.isEmpty) return;
 
     // 更新当前项
-    if (translationHistory.last.isIntermediate) {
+    if (translationHistory.isNotEmpty &&
+        translationHistory.last.isIntermediate) {
       translationHistory.last.sourceText = text;
       translationHistory.last.isIntermediate = false;
       translationHistory.refresh();