Attempt to fix playlist gen dropdown

src/queries/tracks.rs

@@ -87,6 +87,13 @@ pub async fn get_by_artist(db: &DatabaseConnection, artist_id: i32) -> DbResult<
         .await?)
 }
 
+pub async fn count_by_artist(db: &DatabaseConnection, artist_id: i32) -> DbResult<u64> {
+    Ok(Tracks::find()
+        .filter(track::Column::ArtistId.eq(artist_id))
+        .count(db)
+        .await?)
+}
+
 /// Get tracks that need metadata enrichment — either no MBID at all,
 /// or have an MBID but are missing album info (e.g., freshly downloaded).
 pub async fn get_needing_metadata(db: &DatabaseConnection) -> DbResult<Vec<Track>> {