Port the Tauri normalizeCoverUrlForMetadata workaround as ArtworkRef::to_mpris_url
(qbz-models): remote Qobuz covers pass through as-is, local-file covers become a
percent-encoded file:// URI (MPRIS clients cannot read bare paths or asset://),
Plex thumbs become a tokenized HTTP URL. Wired into the Slint now-playing push so
the media widget shows album art. The app icon was already fixed via DesktopEntry.
cc
vicrodh
2a2328e6c6