Now that both server and client use the same locale from context,
the post-hydration useEffect that re-formatted with the browser's
OS locale was causing a visible flicker. Just render with the
context locale directly.
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
Add detectLocale() that extracts the full locale tag (e.g. "de-DE")
from the request, not just the language. The journal root loader passes
it via LocaleContext so ClientDate renders with the correct locale on
both server and client — no more hardcoded "en-US" fallback.
Also fixes settings page hydration mismatch by using ClientDate for
passkey creation dates instead of inline toLocaleDateString().
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
Created ClientDate component that renders dates client-only via
useEffect to prevent server/client locale mismatches. Server
renders with de-DE as default, client updates to user's locale.
Applied to route detail (version dates) and route list (updated dates).
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
