Full technology change: Next.js App Router replaced with Vite +
react-router-dom v6. All 21 pages and 5 landing components converted
(next/link -> Link, next/navigation -> react-router-dom hooks, next/font
-> @fontsource/inter, process.env -> import.meta.env). Dropped the unused
Stripe API routes, which can't run in a client-only Vite build anyway and
were never wired to any page.
Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
