docs: update deploy references from Vercel to Netlify

docs: use custom domain for live demo link

docs: add live demo URL to README

prep for hf deploy

style: replace box diagram with a list, normalize unicode to ASCII, trim comments

feat: Hugging Face Spaces Docker deployment config

update readme

feat: Next.js frontend for hosted demo + README live-demo section

Initial commit: self-improving ad copy agent eval harness