The remembered window placement restored invisible when its monitor was
gone (undocked laptop, powered-off TV), briefly flashed a blank window at
the restored spot before the first Flutter frame, and could lose the
maximized state: the exit path hides the window before a multi-second
teardown, so a debounced save landing in that gap recorded SW_HIDE, and a
window closed while minimized-from-maximized restored as a normal window.
Validate the saved rect against current monitors and keep only the size on
a miss, apply the placement with SW_HIDE so the first-frame callback stays
the single show, skip persisting while the window is hidden, and honor
WPF_RESTORETOMAXIMIZED when deciding to relaunch maximized.
Audio-only mpv core on every platform (dedicated
com.plezy/mpv_audio_player channels): parameterized android/windows/
linux mpv plugins and a new apple MpvAudioPlayerCore, all skipping
video/window paths (vid=no, audio-display=no, gapless-audio=weak).
MusicPlaybackService drives an in-memory queue with shuffle/repeat,
file-loaded-event gapless arming (property edges coalesce and the
android bridge drops them), per-track progress reporting, OS media
controls, audio focus, sleep timer, and error auto-skip.
PlaybackCoordinator enforces one live native player: starting video
disposes the audio core first.