Add the two reusable migration primitives: useLocaleFormat (date/number bound
to the active locale, replacing implicit-browser-locale toLocale* calls — R8)
and useColumnLabel (translate core COLUMN_LABELS via common:columns.* with
English fallback). Migrate the Settings Appearance heading to t() as a worked
example. The bulk migration of the ~464-file long tail is deferred follow-up
work per the plan's Scope Boundaries; the pattern and primitives are in place
so remaining clusters are mechanical.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
677fb9c46c