Track the playing item by id instead of a frozen index, deriving the index from the
live queue so the N / M counter and prev/next neighbours stay correct when the playlist
changes underneath (e.g. an item removed in another tab) without disrupting playback of
the current video. Refetch the playlist list/detail on window focus so such changes flow
in, updating the player's queue length in near-real-time.
peter
ddb1890e84