Final regression sign-off before deployment. Since #018 the only changes
are cosmetic (table/body fonts), so no new API surface — this round is a
broad regression sweep: full CRUD across all kinds, auth boundaries,
confirmation that every closed issue (#003/#004/#006/#008/#010/#014/#015/
#016) stays fixed, and a sharing re-check. A clean pass is the deploy gate.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
