fix model finetuned settings

app/api/routes.py

@@ -37,7 +37,7 @@ async def get_models():
     """Get available Whisper models."""
     return {
         "models": list(AVAILABLE_MODELS.keys()),
-        "default": settings.whisper_lora_model_dir
+        "default": settings.default_whisper_model
     }