Full app audit (UX_AUDIT_2026-10-09.md), heavy on the marketplace flow
sequence. Headline verified findings: useMarketplaceItem does not filter
admin-hidden or exclude showcase-only listings (a hidden/not-for-sale
listing is reachable by URL); the buyer CTAs compete on fixed-price
listings and Make an offer is shown to logged-out users; the grid's Mark
as sold skips MarkSoldDialog so no trade attestation is recorded; the hub
tabs are not URL-addressable; nav.marketplace and nav.trades are
duplicate labels; and the nav customizer Reset hardcodes 3 tabs against
MIDDLE_SLOTS 4. Includes a recommended fix order. Audit only, no code
changes.
