fix(admin-audio): fediverse-share toggle is now AJAX (no page jump)
The new per-track fedi-share toggle used a form POST + redirect, so clicking it reloaded the
page and jumped to the top. It now toggles via AJAX in place, mirroring the download toggle.
- src/views/pages/admin-audio.ejs — fedi button -> data-track-fedi + an AJAX click handler
- src/routes/admin-audio.js — the /api/:id field-update route now accepts fedi_open
Co-Authored-By: Claude <noreply@…>