Fix: Preload image model when configured (even with audio models)

Changed condition from 'only if no audio models' to 'always when image_models is configured'.
This ensures the image model downloads at startup even when audio models are present.

coderai

@@ -4900,8 +4900,8 @@ def main():
                 'offload': args.vision_offload,
             })
         
-        # Pre-load image model if it's the only model configured
-        if not model_names and not audio_models and not args.tts_model:
+        # Pre-load image model if it's configured (even with audio models)
+        if image_models:
             print(f"Pre-loading image model...")
             
             # Get the original model name