apps/web becomes a Vite + React application: React Router with home
and 404 routes, base layout (top bar, collapsible sidebar remembered
per user via localStorage, main area), CSS design tokens including the
three font slots from ADR 0016, TanStack Query, and a typed fetch
helper showing live API health on the home page. All UI strings go
through a t() stub that issue #5 replaces with i18next. The Vite dev
server proxies /api to the api dev port (3001).
Closes#4
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
