Replace the three remaining hand-written admin-loading/admin-spinner
markup blocks with the kit <LoadingState /> component:
- AdminApp.tsx Suspense fallback
- AppShell.tsx loading branch
- PlanGrid.tsx no-data branch (plan-* classes untouched)
After this the only remaining admin-* classes in TSX are
admin-rich-editor (RichEditor/Quill) and admin-rich-text-view
(sanitized HTML in Order/Invoice detail).
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
58da09cdc0