The confirmation dialog gains a "Use for All N Songs in Album" button
(shown when the library's album has more songs than the selection); it
embeds the chosen art into every track matching the album, not just the
right-clicked ones. Album membership matches case-insensitively on album
name + album artist (falling back to track artist), the same grouping the
search already uses.
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>