Audit v2 priority #8 — daily-touch player polish. MiniPlayer was
just cover + title + play-pause + kebab; now matches Flutter:
* Slim 4dp Slider at the top of the bar (Material3 thumb + active
primary, no labels — those live on NowPlaying).
* Row: cover | title/artist | LikeButton | Prev | Play/Pause | Next | kebab.
* The cover-and-title region is the only part that expands to
NowPlaying on tap; each IconButton handles its own click so a
prev/next tap doesn't accidentally open the full player.
Bar height bumped 64 → 80dp to fit the slider above the row.
LikeButton sources its state from the shell-level TrackActionsViewModel
already plumbed through ShellScaffold (same hiltViewModel() instance).
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>