feat(web): align the web UI with the design prototype

- Ambient background in the app shell: three drifting blurred blobs,
  the third one tinted with the current track's cover; can be turned off
  in settings and stays still with reduced motion.
- Island player variant (floating glass panel) next to the bar, chosen
  in settings; player source line ("Album · …", "My Wave"), reactions
  around the transport controls, queue drawer.
- Sidebar: like / dislike counters, pending uploads badge on Queue,
  admin Settings page holding the upload queue limits.
- Collection: header tile with kicker, underline tabs, time / number
  lead column with an equalizer for the current track, album column,
  dimmed dislikes with undo, Play all / Shuffle pills.
- Album: cover-tinted header and Play / Shuffle; artist: artist wave,
  Play and popular tracks (new GET /artists/{id}/top-tracks).

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

apps/web/src/shared/ui/icons.ts

@@ -63,3 +63,8 @@ export { default as myUploadsIcon } from '@material-symbols/svg-400/rounded/libr
 export { default as myUploadsFillIcon } from '@material-symbols/svg-400/rounded/library_add-fill.svg';
 export { default as inboxIcon } from '@material-symbols/svg-400/rounded/inbox.svg';
 export { default as inboxFillIcon } from '@material-symbols/svg-400/rounded/inbox-fill.svg';
+export { default as waveIcon } from '@material-symbols/svg-400/rounded/graphic_eq.svg';
+export { default as tuneIcon } from '@material-symbols/svg-400/rounded/tune.svg';
+export { default as tuneFillIcon } from '@material-symbols/svg-400/rounded/tune-fill.svg';
+export { default as queueIcon } from '@material-symbols/svg-400/rounded/queue_music.svg';
+export { default as undoIcon } from '@material-symbols/svg-400/rounded/undo.svg';