Translation resources live in packages/shared/i18n/<lang>/<ns>.json
(common, errors) and ship with de and en. The web app initializes
react-i18next with bundled resources (?lng= wins, then the browser
language); all shell components use useTranslation and the temporary
t() stub is gone. The api localizes its uniform error bodies via a
minimal i18next instance negotiated from Accept-Language. `pnpm
i18n:check` fails CI when any key is missing in any language, backed
by tested helpers in @dorfteich/shared.
Closes#5
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
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>
