switch to static HTML SDK (no Python deps, nhindsbo.com aesthetic)

remove requirements.txt (switched to static SDK)

remove app.py (switched to static SDK)

deps: bump to gradio 5.6 (drops pydub, uses modern hf_hub API)

redesign: nhindsbo.com-style landing + prominent GitHub + clickable paper PDF

fix: pin Python 3.11 (audioop removed in 3.13)

Initial landing page

initial commit