feat(meta): Implement removing tracking items

lib/src/ui/bloc/anime_list_bloc.dart

@@ -24,6 +24,8 @@ class AnimeListBloc extends Bloc<AnimeListEvent, AnimeListState> {
     on<MangaChapterDecrementedEvent>(_onMangaDecremented);
     on<AnimeUpdatedEvent>(_onAnimeUpdated);
     on<MangaUpdatedEvent>(_onMangaUpdated);
+    on<AnimeRemovedEvent>(_onAnimeRemoved);
+    on<MangaRemovedEvent>(_onMangaRemoved);
   }
 
   Future<void> _onAnimeAdded(AnimeAddedEvent event, Emitter<AnimeListState> emit) async {
@@ -206,4 +208,30 @@ class AnimeListBloc extends Bloc<AnimeListEvent, AnimeListState> {
       ),
     );
   }
+
+  Future<void> _onAnimeRemoved(AnimeRemovedEvent event, Emitter<AnimeListState> emit) async {
+    emit(
+      state.copyWith(
+        animes: List.from(
+          state.animes.where((anime) => anime.id != event.id),
+        ),
+      ),
+    );
+
+    // Update the database
+    await GetIt.I.get<DatabaseService>().deleteAnime(event.id);
+  }
+  
+  Future<void> _onMangaRemoved(MangaRemovedEvent event, Emitter<AnimeListState> emit) async {
+    emit(
+      state.copyWith(
+        mangas: List.from(
+          state.mangas.where((manga) => manga.id != event.id),
+        ),
+      ),
+    );
+
+    // Update the database
+    await GetIt.I.get<DatabaseService>().deleteManga(event.id);
+  }
 }

lib/src/ui/bloc/anime_list_event.dart

@@ -48,6 +48,13 @@ class AnimeUpdatedEvent extends AnimeListEvent {
   final AnimeTrackingData anime;
 }
 
+class AnimeRemovedEvent extends AnimeListEvent {
+  AnimeRemovedEvent(this.id);
+
+  /// The ID of the anime to be removed from the list.
+  final String id;
+}
+
 class MangaAddedEvent extends AnimeListEvent {
   MangaAddedEvent(this.data);
   
@@ -82,3 +89,10 @@ class MangaUpdatedEvent extends AnimeListEvent {
 
   final MangaTrackingData manga;
 }
+
+class MangaRemovedEvent extends AnimeListEvent {
+  MangaRemovedEvent(this.id);
+
+  /// The ID of the manga to be removed from the list.
+  final String id;
+}

lib/src/ui/bloc/details_bloc.dart

@@ -18,6 +18,7 @@ class DetailsBloc extends Bloc<DetailsEvent, DetailsState> {
     on<AnimeDetailsRequestedEvent>(_onAnimeRequested);
     on<MangaDetailsRequestedEvent>(_onMangaRequested);
     on<DetailsUpdatedEvent>(_onDetailsUpdated);
+    on<ItemRemovedEvent>(_onItemRemoved);
   }
 
   Future<void> _onAnimeRequested(AnimeDetailsRequestedEvent event, Emitter<DetailsState> emit) async {
@@ -77,4 +78,26 @@ class DetailsBloc extends Bloc<DetailsEvent, DetailsState> {
       );
     }
   }
+
+  Future<void> _onItemRemoved(ItemRemovedEvent event, Emitter<DetailsState> emit) async {
+    emit(
+      state.copyWith(
+        data: null,
+      ),
+    );
+
+    /// Remove the item from the database
+    final bloc = GetIt.I.get<AnimeListBloc>();
+    switch (event.trackingType) {
+      case TrackingMediumType.anime:
+        bloc.add(AnimeRemovedEvent(event.id));
+        break;
+      case TrackingMediumType.manga:
+        bloc.add(MangaRemovedEvent(event.id));
+        break;
+    }
+
+    // Navigate back
+    GetIt.I.get<NavigationBloc>().add(PoppedRouteEvent());
+  }
 }

lib/src/ui/bloc/details_event.dart

@@ -19,5 +19,15 @@ class MangaDetailsRequestedEvent extends DetailsEvent {
 class DetailsUpdatedEvent extends DetailsEvent {
   DetailsUpdatedEvent(this.data);
 
-  final dynamic data;
+  final TrackingMedium data;
+}
+
+class ItemRemovedEvent extends DetailsEvent {
+  ItemRemovedEvent(this.id, this.trackingType);
+
+  /// The ID of the item to be removed
+  final String id;
+
+  /// The type of medium of the item
+  final TrackingMediumType trackingType;
 }