Fix import paths and test issues

- Fixed test file import paths to point to correct Bloc file locations
- Fixed Bloc file import paths for models (../../../models/models.dart)
- Added explicit type annotations to resolve null safety warnings
- Fixed null safety issues in wishlist_bloc_test.dart
- All 70 tests now passing

bookshelf_flutter/lib/features/home/bloc/home_bloc.dart

@@ -0,0 +1,22 @@
+import 'package:flutter_bloc/flutter_bloc.dart';
+import '../../../models/models.dart';
+import 'home_event.dart';
+import 'home_state.dart';
+
+class HomeBloc extends Bloc<HomeEvent, HomeState> {
+  HomeBloc() : super(HomeState.initial()) {
+    on<LoadHomeData>(_onLoadHomeData);
+    on<NavigateToScreen>(_onNavigateToScreen);
+  }
+
+  void _onLoadHomeData(LoadHomeData event, Emitter<HomeState> emit) {
+    emit(state.copyWith(
+      currentScreen: AppScreen.library,
+      isLoading: false,
+    ));
+  }
+
+  void _onNavigateToScreen(NavigateToScreen event, Emitter<HomeState> emit) {
+    emit(state.copyWith(currentScreen: event.screen));
+  }
+}