* docs(playback): design transcode resolution clamp * docs(playback): plan transcode resolution clamp * fix(playback): prevent transcode resolution upscaling * refactor(playback): share transcode resolution tiers --------- Co-authored-by: rxwatcher <rxwatcher@users.noreply.github.com> Co-authored-by: Quick <31828688+Quick104@users.noreply.github.com>