feat(slint): favorites Artists grid card fidelity + derive_artists

Drop the albums_count line from the artist card (Tauri #169: Qobuz's count
includes compilations/tributes and is misleadingly high) — removed from
ArtistCard, map_artist, FavoriteArtistItem and FavArtistCard. Shrink the card
image to a 120px circle to match Tauri. Add derive_artists (name-substring
search filter → artists-visible/artists-shown), seeded on load; grouping +
the alpha strip layer on next.

cc

crates/qbz-slint/src/favorites.rs

@@ -129,7 +129,6 @@ pub struct TrackCard {
 pub struct ArtistCard {
     pub id: String,
     pub name: String,
-    pub albums_line: String,
     pub image_url: String,
 }
 
@@ -363,14 +362,11 @@ fn map_track(track: Track) -> TrackCard {
 }
 
 fn map_artist(artist: Artist) -> ArtistCard {
-    let albums_line = match artist.albums_count {
-        Some(n) if n > 0 => format!("{} albums", n),
-        _ => String::new(),
-    };
+    // albums_count is deliberately NOT shown (Tauri #169: Qobuz's count
+    // includes compilations/tributes and is misleadingly high).
     ArtistCard {
         id: artist.id.to_string(),
         name: artist.name,
-        albums_line,
         image_url: artist
             .image
             .and_then(|img| img.best().cloned())
@@ -465,13 +461,16 @@ pub fn apply_favorites(window: &AppWindow, data: FavData) {
                 .map(|a| FavoriteArtistItem {
                     id: a.id.into(),
                     name: a.name.into(),
-                    albums_line: a.albums_line.into(),
                     image_url: a.image_url.into(),
                     image: slint::Image::default(),
                 })
                 .collect();
-            state.set_artists(ModelRc::new(VecModel::from(cards)));
+            let model = ModelRc::new(VecModel::from(cards));
+            state.set_artists(model.clone());
+            state.set_artists_visible(model);
             state.set_artists_total(total as i32);
+            state.set_artists_search("".into());
+            derive_artists(window);
         }
         FavData::Playlists { favorites, following } => {
             let fav_items: Vec<SearchPlaylistItem> =
@@ -624,6 +623,27 @@ pub fn derive_playlists(window: &AppWindow) {
     state.set_playlists_visible(ModelRc::new(VecModel::from(filtered)));
 }
 
+/// Re-derive the rendered Artists grid (`artists-visible`) from the full
+/// `artists` set + the search query (name substring; mirrors Tauri's
+/// filteredArtists). A-Z grouping + the alpha strip are layered on later.
+pub fn derive_artists(window: &AppWindow) {
+    let state = window.global::<FavoritesState>();
+    let query_owned = state.get_artists_search().to_lowercase();
+    let query = query_owned.trim();
+    let all = state.get_artists();
+    if query.is_empty() {
+        state.set_artists_shown(all.row_count() as i32);
+        state.set_artists_visible(all);
+        return;
+    }
+    let filtered: Vec<FavoriteArtistItem> = (0..all.row_count())
+        .filter_map(|i| all.row_data(i))
+        .filter(|a| a.name.to_lowercase().contains(query))
+        .collect();
+    state.set_artists_shown(filtered.len() as i32);
+    state.set_artists_visible(ModelRc::new(VecModel::from(filtered)));
+}
+
 /// The loaded favorite tracks as a play-ready queue (Play all).
 pub fn play_tracks() -> Vec<Track> {
     FAV_CURRENT.lock().map(|c| c.clone()).unwrap_or_default()

crates/qbz-slint/ui/favorites/FavoritesView.slint

@@ -394,10 +394,10 @@ component FavArtistCard inherits Rectangle {
     VerticalLayout {
         spacing: 10px;
         Rectangle {
-            width: 140px;
-            height: 140px;
+            width: 120px;
+            height: 120px;
             x: (parent.width - self.width) / 2;
-            border-radius: 70px;
+            border-radius: 60px;
             background: Theme.surface-elevated;
             clip: true;
             Image {
@@ -421,6 +421,7 @@ component FavArtistCard inherits Rectangle {
                 }
             }
         }
+        // albums_count line intentionally omitted (Tauri #169).
         Text {
             text: root.item.name;
             color: Theme.text-primary;
@@ -430,13 +431,6 @@ component FavArtistCard inherits Rectangle {
             overflow: elide;
             width: 160px;
         }
-        if root.item.albums-line != "": Text {
-            text: root.item.albums-line;
-            color: Theme.text-muted;
-            font-size: Typography.legal;
-            horizontal-alignment: center;
-            width: 160px;
-        }
     }
 }
 

crates/qbz-slint/ui/state.slint

@@ -1433,7 +1433,6 @@ export global PlaylistPickerActions {
 export struct FavoriteArtistItem {
     id: string,
     name: string,
-    albums-line: string,
     image-url: string,
     image: image,
 }