feat(artists): add branded headers and incremental release loading

rust_backend/crates/extensions/src/backend/provider_metadata.rs

@@ -79,6 +79,8 @@ impl Backend {
                     "image_url",
                     "header_image",
                     "header_video",
+                    "header_logo",
+                    "albums_next",
                     "provider_id",
                 ],
             );
@@ -422,7 +424,15 @@ fn response(kind: &str, value: &Value, check: &Check<'_>) -> Result<Value, Resol
                 .unwrap_or_default();
             let mut info = strings(
                 value,
-                &["id", "name", "header_image", "header_video", "provider_id"],
+                &[
+                    "id",
+                    "name",
+                    "header_image",
+                    "header_video",
+                    "header_logo",
+                    "albums_next",
+                    "provider_id",
+                ],
             );
             info.insert("images".into(), json!(image));
             info.insert("cover_url".into(), json!(cover));

rust_backend/crates/extensions/src/backend/provider_metadata/value_tests.rs

@@ -17,7 +17,11 @@ function collection(id) {
             provider_id: "supplied-track", duration_ms: 123456, track_number: i + 1,
             explicit: i % 2 === 0, external_links: {example: "https://example.invalid/track/" + i}}))};
 }
-registerExtension({getAlbum: collection, getPlaylist: collection});
+function getArtist(id) {
+    return {id, name: "Example Artist", image_url: "https://example.invalid/portrait.jpg",
+        headerLogo: "https://example.invalid/logo.png", albumsNext: "artist-page-2", albums: []};
+}
+registerExtension({getAlbum: collection, getPlaylist: collection, getArtist});
 "#;
 
 fn fixture() -> (tempfile::TempDir, Backend) {
@@ -45,6 +49,26 @@ fn fixture() -> (tempfile::TempDir, Backend) {
     (root, backend)
 }
 
+#[test]
+fn artist_metadata_preserves_logo_separately_from_portrait() {
+    let (_root, backend) = fixture();
+    let raw = backend
+        .get_provider_metadata_json(ID, "artist", "artist-1", &|| Ok(()))
+        .unwrap();
+    let value: Value = serde_json::from_str(&raw).unwrap();
+    assert_eq!(
+        value["artist_info"]["header_logo"],
+        "https://example.invalid/logo.png"
+    );
+    assert_eq!(
+        value["artist_info"]["images"],
+        "https://example.invalid/portrait.jpg"
+    );
+    assert_eq!(value["artist_info"]["name"], "Example Artist");
+    assert_eq!(value["artist_info"]["albums_next"], "artist-page-2");
+    backend.shutdown();
+}
+
 #[test]
 fn metadata_value_bridge_preserves_album_playlist_and_public_json() {
     let (_root, backend) = fixture();

rust_backend/crates/extensions/src/provider.js

@@ -194,6 +194,8 @@
         const tracks = array(first(object(value), ["top_tracks","topTracks","tracks"]), track);
         const result = fields(value, [["id","s"],["name","s"],["image_url","s","imageUrl"],
             ["header_image","s","headerImage"],["header_video","s","headerVideo"],
+            ["header_logo","s","headerLogo"],
+            ["albums_next","s","albumsNext"],
             ["listeners","i"],["provider_id","s","providerId"]], ["id","name","provider_id"]);
         if (albums.length) result.albums = albums;
         if (releases.length) result.releases = releases;