- New src/lib/dateFnsI18n.ts re-exports date-fns with formatDistanceToNow /
formatDistanceToNowStrict / formatDistance / format defaulting to the active
locale, plus dateLocaleCode() for native toLocale{Date,Time}String calls.
- LanguageProvider keeps the locale in sync during render, so the first paint is
already in-language.
- Codemod: 11 date-fns imports now use the shim; ~39 native date/time calls pass
the app locale code instead of undefined/[]/hardcoded 'en-US'. Number
.toLocaleString() calls are deliberately untouched.
