Fix queue next unplayed episode shortcut.

Author: amugofjava

lib/bloc/podcast/queue_bloc.dart

@@ -36,7 +36,7 @@ class QueueBloc extends Bloc {
       } else if (event is QueueAddNextUnplayedEpisodeEvent) {
         var e = event.podcast;
         if (e != null) {
-          await audioPlayerService.addUpNextLatestEpisode(podcast: e);
+          await audioPlayerService.addUpNextUnplayedEpisode(podcast: e);
         }
       } else if (event is QueueRemoveEvent) {
         var e = event.episode;

lib/services/audio/default_audio_player_service.dart

@@ -172,8 +172,8 @@ class DefaultAudioPlayerService extends AudioPlayerService {
   Future<void> addUpNextUnplayedEpisode({required Podcast podcast, bool? resume}) async {
     final nextEpisode = await repository.findNextUnplayedEpisode(podcast);
 
-    if (nextEpisode != null) {
-      return _playNextEpisode(episode: nextEpisode, resume: resume, fresh: true);
+    if (nextEpisode != null && !_queue.contains(nextEpisode)) {
+      return addUpNextEpisode(nextEpisode);
     }
   }