Add a dedicated version tile to the admin overview showing the running
version, short build SHA, and build timestamp, alongside a best-effort
'update available' hint computed against the latest GitHub release tag. The
hint reuses the existing /api/version/check-updates proxy (server-side
safeFetch past the CSP) so no new route or OpenAPI schema is introduced; the
check is day-stale and never blocks the render. Cookie-admin only by virtue of
the admin layout.
Marc-André Bombeck
7b171cc5e3