The cover is image-fit:contain filling the flex art area (no fragile parent-geometry math), so it is large and scales with the window. Toggle and meta rows get vertical-stretch:0 so only the art area takes the slack (nested layouts stretch greedily) — kills the dead space and the ~55px cover. Title toned to 20px, quality stamp floats on the transport row instead of owning a line. Cover<->Lyrics toggle; lyrics fill the panel width.
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Left panel toggles cover/synced lyrics (reuses LyricsLinesView, gated on status==2 to dodge the geometry recursion footgun); right panel is a Queue/History list (Flickable+VerticalLayout so rows top-anchor). The lyrics-sync engine bailed unless a desktop/immersive surface was open, so a kiosk-lyrics-follow flag on ShellState widens lyrics_surface_open().
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KioskNowPlaying: a 50/50 full screen (big cover + title/artist + AudioStamp
+ SeekBar + the reused 7-control TransportControls on the left, the Up-Next
queue on the right), reading NowPlayingState/QueueState and calling
QueueState.panel-opened() on init. New ContentView.now-playing route; the
NavRail Now Playing tile navigates there instead of opening immersive. Also
hide the Miniplayer + Immersive items from the NPB view menu while in the
kiosk profile (todos o ninguno) so it is not a second-window/overlay mix.
Validated via slintcheck.
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vicrodh