fix model selection

app.py

@@ -379,6 +379,14 @@ def process_audio_file(
         gr.Info("Please upload an audio file.")
         return "", "", None
     
+    # Ensure the selected models are actually loaded before processing
+    for _ in dialogue_model.handle_TTS_selection(TTS_option):
+        continue
+    for _ in dialogue_model.handle_ASR_selection(ASR_option):
+        continue
+    for _ in dialogue_model.handle_LLM_selection(LLM_option):
+        continue
+    
     # Extract sample rate and audio data
     sr, y = audio_file