Fix audio prompt handling in web interface - use music_prompt for music generation

webapp.py

@@ -264,12 +264,13 @@ def build_command(params: Dict) -> List[str]:
         cmd.append('--generate-audio')
         if params.get('audio_type'):
             cmd.extend(['--audio-type', params['audio_type']])
-        if params.get('audio_text'):
+        # Use appropriate text/prompt based on audio type
+        if params.get('audio_type') == 'music' and params.get('music_prompt'):
+            cmd.extend(['--audio-text', params['music_prompt']])
+        elif params.get('audio_text'):
             cmd.extend(['--audio-text', params['audio_text']])
         if params.get('tts_voice'):
             cmd.extend(['--tts-voice', params['tts_voice']])
-        if params.get('music_prompt'):
-            cmd.extend(['--music-prompt', params['music_prompt']])
     
     if params.get('sync_audio'):
         cmd.append('--sync-audio')