Streamyfin

- Fixed a crash when a download starts in the background.
- Fewer player freezes, and playback recovers on its own when the audio renderer fails.
- The resume point is no longer lost when you back out before playback starts.
- Cancelling a download now reliably stops it and removes the files it left behind.
- The favourites "See all" grid and the library filter bar no longer slide under the header.