Mobile-first rewrite of index.html, add static smoke test, update Pages workflow and README#7

Huỳnh Thương (Huynhthuongg) wants to merge 6 commits into

mainRKIX-AI/AGENTS.RKIX3:mainfrom

codex/review-code-and-propose-fixesRKIX-AI/AGENTS.RKIX3:codex/review-code-and-propose-fixesCopy head branch name to clipboard