播放的修复路径错误

lib/utils/audio_manager.dart

@@ -21,16 +21,16 @@ class AudioManager {
     String soundAsset;
     switch (sound) {
       case 'Dripping':
-        soundAsset = 'assets/sounds/dripping.mp3';
+        soundAsset = 'sounds/dripping.mp3';
         break;
       case 'Alarm':
-        soundAsset = 'assets/sounds/alarm.mp3';
+        soundAsset = 'sounds/alarm.mp3';
         break;
       case 'Bell':
-        soundAsset = 'assets/sounds/bell.mp3';
+        soundAsset = 'sounds/bell.mp3';
         break;
       default:
-        soundAsset = 'assets/sounds/dripping.mp3';
+        soundAsset = 'sounds/dripping.mp3';
     }
 
     await _audioPlayer.setVolume(volume);