feat: mochi-driven redesign — accessibility fixes, scroll animations, visual polish

chore: add remaining modified and untracked files

feat: redesign UI to match v2 reference — Apple-style polish

feat: v2 visual redesign with dark mode, lunchbox, and new navigation

feat: upgrade Twitter Growth Engine with reply-first strategy

feat: add 3 new mochis — Altman Voice, Viral Script Writer, Twitter Growth Engine

feat: add OG images, favicon, sitemap, robots.txt, final polish

feat: add menu browse page and about page

feat: add 27 House Special mochis and seed script

feat: add home, flavor, and mochi detail pages with OG images

feat: align design system with brand identity, add header and footer

feat: add mochi design system and core UI components

feat: initialize mochi.market with next.js, supabase, and brand constants