Scrobble timing: at onMediaItemTransition ctrl.duration is still TIME_UNSET (→0),
so getScrobbleDelayMs's third/two_thirds modes hit the 15s floor and scrobbled way
too early (both Navidrome + our play-log). Use the song's KNOWN duration
(song.duration), falling back to the player only if absent. Web was unaffected
(it already used the song's duration).
Settings flicker: the ViewModel started with default state (theme = Dark Ocean)
and rendered a frame before DataStore emitted the real values, so the theme picker
visibly jumped. Gate the form on a 'loaded' flag set after the first emit; show a
spinner until then.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>