Fix app.py: Use exec() to properly execute gradio_app as __main__

Fix UI loading: Remove FastAPI wrapper and use Gradio's native server

Use runpy.run_path for cleaner gradio_app execution

Fix sys.argv to prevent Gradio URLs from being parsed as arguments

Fix app.py to properly execute gradio_app main block

Fix HF Spaces: app.py execution, add packages.txt and spaces library

Prepare for HF Spaces deployment: add app.py, update README with Python 3.10 config