mpv (video) and amberol (audio) are both already in the template suite;
the gap was mime wiring — audio/* still resolved to mpv.desktop. Repoint
the audio types to io.bassi.Amberol.desktop (id verified against the
built package) and broaden coverage to mp3/flac/ogg/opus/wav/m4a/aac,
both canonical and x- names. Video stays on mpv. Degrades to mpv if a
downstream drops Amberol from the suite.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>