Install Tailwind v4 with @tailwindcss/vite plugin, TypeScript, and
shadcn/ui (button + sheet components). Convert shared layout files
(App, AdminNavbar, AuthContext, ProtectedRoute, useSocket, api) from
JSX/JS to TSX/TS with type annotations. Rebuild AdminNavbar using
shadcn Button and Sheet components with Tailwind classes, replacing
custom CSS. Page components remain as JSX for incremental migration.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
