Fixed track art

src/app/popup.rs

@@ -215,12 +215,14 @@ fn save_edit(
             if artists.is_empty() {
                 return Err("at least one artist is required".to_string());
             }
+            let cover_path = value("Cover path");
             let edit = TrackEdit {
                 title,
                 artists,
                 featured_artists: names("Featured"),
                 track_number: number("Track #")?,
                 disc_number: number("Disc #")?,
+                cover_path: (!cover_path.is_empty()).then_some(cover_path),
             };
             library.update_track(id, &edit)
         }

src/app/update.rs

@@ -422,6 +422,7 @@ fn track_edit_popup(track: &TrackItem) -> super::state::Popup {
                 "Disc #",
                 track.disc_number.map(|n| n.to_string()).unwrap_or_default(),
             ),
+            EditField::new("Cover path", track.cover_path.clone().unwrap_or_default()),
         ],
         focus: 0,
         error: None,