GET /ponds/:id/pages lists a pond's pages ordered by the pond's
persisted sidebarSort setting (alpha/created; manual arrives with #45).
The sidebar consumes it to show the page list with an active-page
highlight, an owner-only sort switch (persists via the existing
PATCH /ponds/:id), and an inline "new page" flow. The top bar gains a
pond switcher; a new /p/:pondSlug route gives it somewhere to land,
redirecting to the pond's first page once loaded. Sidebar collapse
gains a Ctrl/Cmd+\ shortcut and a slightly refined transition.
Closes#26
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>
