feat(library): genre sliders, artist links, and navigation utils

- music landing: diverse per-genre album sliders (online counts /
  offline wide-probe fallback) and home-screen library shortcuts
- add ArtistLinks component and shared navigation/genreDiversity utils
- player/playback-mode refinements across Rust and frontend

src-tauri/src/player/android/mod.rs

@@ -678,7 +678,12 @@ pub extern "system" fn Java_com_dtourolle_jellytau_player_JellyTauPlayer_nativeO
         // Use tauri::async_runtime::spawn instead of tokio::spawn
         // JNI callbacks happen on arbitrary threads without a Tokio runtime
         tauri::async_runtime::spawn(async move {
-            match controller.lock().await.on_playback_ended().await {
+            // Compute the autoplay decision and release the lock before matching.
+            // Holding the guard across the match would deadlock the AdvanceToNext
+            // arm, which re-locks the controller to call next() — leaving playback
+            // stopped (paused at position 0) instead of advancing.
+            let decision = controller.lock().await.on_playback_ended().await;
+            match decision {
                 Ok(AutoplayDecision::Stop) => {
                     log::debug!("[Autoplay] Decision: Stop playback");
                     // Emit PlaybackEnded event to frontend