/shop/audio-tracks/{id}: resolves each track's preview from its Apple song id via iTunes lookup
(au), cached in disc_release_track.apple_preview. /shop/audio validates YouTube via oembed (200=live),
caches dead in disc_release_video.dead, returns one live id. release.html + kiosk.html get a per-track
▶ on each tracklist row feeding a mini-player with a jog/seek bar (falls back to a single Listen).
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>