Restore audio/video preview with tabs

Add example with Git LFS for MP4

Revert to simple clean UI

Add video preview with tabs for audio/video upload

Add MP4 and video file support

Fix: follow official HF example exactly

Follow official sam-audio example exactly

Follow sam3 pattern: global model load with spaces.GPU

Fix: lazy load model inside GPU context for ZeroGPU

feat: Migrate the deployment to the Gradio SDK, integrate the `spaces.GPU` decorator, and remove the Dockerfile.

Switch to Docker SDK with Python 3.12

Fix import error by using sam-audio library

feat: Added the SAM Audio audio segmentation Web UI based on Gradio and its dependencies.