- Route legacy yattee://watch?v=, yattee://youtube.com/..., yattee://https://...
links like their web equivalents (only natively handled destinations)
- Unwrap yattee://open?url= inside route() so every caller keeps the inner
URL's own query items
- Never route file:// URLs as direct media
- Support source/instance on yattee://playlist and PeerTube /w/p/ and
/video-playlists/ URLs
- Leave open sheets alone and show a toast for links that go nowhere