Two browsing shortcuts and a button-alignment pass on the marketplace listing page.
Click a category to see the rest of the shelf. The Category row in the right-hand facts card on /market/{slug} is now a link to /market?category=N. Platform works the same — one click from the facts card filters the marketplace to that platform. The platform text still has a small "hub" link next to it if you wanted the platform SEO page instead.
Every seller has a listings page now. Visit /market/user/{username} to see all of a seller's active listings in the familiar marketplace card grid. Status pills at the top flip between Active, Sold, and All (All is mostly useful for the seller themselves and admins). The listing detail page shows a new "N other active listings from @seller" link in the seller card whenever the seller has additional stock up.
Button alignment fixed. The Mark-sold form on the listing page held a text input + a button right next to the Withdraw button, which made the toolbar row stretch to match the input's height. Split it: Edit and Withdraw (or Re-list) now sit on a clean flex row, and the Mark-sold buyer-username field gets its own full-width row below. Buyer-side card buttons — Message, Watch, Report — are now all the same small block size instead of Report being visibly smaller than the other two.
Nothing else changed in listing behavior: listings, thumbnails, photo lightbox, Q&A, watchlist, multi-unit, and feedback all work exactly as before.
