Update app.py

app.py

@@ -293,9 +293,9 @@ async def generate_tts_optimized(id, lines, lang):
     if output and os.path.exists(audio_path):
         audio = MP3(audio_path)
         duration = audio.info.length
-        return duration, audio_path
+        
     
-    return None, None
+    return duration, audio_path
 
 def audio_func(id, lines, lang):
     """Synchronous wrapper for audio generation."""