type: added
area: youtube

- Added a YouTube browser window (`subminer youtube`/`subminer yt`, or tray **Browse YouTube**) that keeps your YouTube login across restarts.
- Clicking a video plays it in mpv instead of the page; middle-click, Shift/Ctrl-click, or the right-click menu queues it in mpv's playlist.
- Queued YouTube videos get the same Japanese subtitle setup when mpv reaches them.
- Closing the YouTube window quits a SubMiner started by `subminer youtube` (after mpv closes, if a video is still playing).