Regression from v2026.05.13.2's load-then-swap rewrite. _displayedMedia
only got populated by the ref.listen callback on mediaItem changes,
but ref.listen doesn't fire on initial subscription — it only fires
on transitions after the listener is registered. So opening the full
player while a track was already playing left _displayedMedia null
and the screen rendered "Nothing playing." even though the mini bar
showed a live track.
initState now reads the current mediaItem synchronously and seeds
_displayedMedia immediately (and _displayedDominant from the color
provider's cached value when available). A post-frame
_scheduleSwap(current) runs to ensure the cover bytes are decoded
and dominant color resolved when the user opens the player to a
track whose album hasn't yet been color-extracted in this session.
bvandeusen
2df35e6227