Merge branch 'chore/listenbrainz-config-done': ListenBrainz user configured

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

docs/TODO.md

@@ -26,7 +26,6 @@ Small, specific, independently actionable. Remove only when actually done.
   now a tile (DECISIONS). Still open: the lean animates `flex-grow`, a layout animation repainting both halves every
   frame; a transform/clip-path lean would run on the compositor. Hover lab (local only): `.tmp/real-site/hover-lab.html`
   switches off each effect and shows fps; baseline `.tmp/real-site/fps.html`.
-- [ ] Homelab config: add `LISTENBRAINZ_USER=stereotypicalcat` to the site's environment (spec 004), or the strip's Listening cell stays out.
 - [ ] The strip's Listening cell replaced the newest pinned song (owner: "for now, then we can look at alternatives later"). The pinned song's note ("why ↘") now has no spot in the strip; look at alternatives.
 - [ ] Revisit the start page's "or wander through everything at once" pill (and its G shortcut). Hidden for now on the owner's request: `SHOW_EVERYTHING_PILL` in `src/site/pages/index.astro`. Its CSS, the seam positioning in `Gate.tsx` and the seam check in `e2e/gate.spec.ts` are kept; `/everything/` is still reachable from `/simple`.
 - [ ] Personal wall: a chip filter is not reflected in the URL, so a filtered view can't be shared.