fix: track info desyncs and hanging metadata the websocket kept falling behind and leaving stale song info on the screen for way too long. octogiraffe (https://github.com/kikeijuu) determined this could be fixed by having grrs listen to mpv as the source of truth, plus logic to force a reconnect when things *do* drift. many thanks, octo! additionally, there were some minor background threading fixes. things should work slightly better now! co-authored-by: octogiraffe (https://github.com/kikeijuu)