`src/library.rs:130` - String clone in sort_by_key

[ducks]

Found by lok hunt:

src/library.rs:130 - String clone in sort_by_key

• self.artists.sort_by_key(|a| a.name.clone()) allocates for every comparison
• Fix: sort_by(|a, b| a.name.cmp(&b.name)) to borrow instead

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Backend: claude