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.
cc
vicrodh
6032791be4