Work from a parallel session in the same working tree, committed here so the
branch is not left half-written. Attribution note: authored in a concurrent
Claude session, not by the author of the preceding commit.
- DR-171: a downloaded video keeps audio the device can actually decode.
`original` quality asked for a straight copy, so an E-AC-3/AC-3/DTS/TrueHD
track came down untouched and the webview had nothing to play it with.
- `get_video_download_url` gains the media source, so the URL is built against
the source actually chosen rather than the item's default.
- Device profile and repository plumbing updated to match.
Verified green as a whole: 656 Rust tests, 945 frontend tests, svelte-check clean.
dtourolle
ac4fccd499