Add similar posts, provider hints and app icon

lib/app/app_version.dart

@@ -1,2 +1,2 @@
-const appDisplayVersion = '0.4.0';
-const appBuildNumber = 4;
+const appDisplayVersion = '0.4.2';
+const appBuildNumber = 6;

lib/app/router.dart

@@ -7,6 +7,7 @@ import '../features/collections/presentation/collections_screen.dart';
 import '../features/favorites/presentation/favorites_screen.dart';
 import '../features/feed/presentation/feed_screen.dart';
 import '../features/post/presentation/post_details_screen.dart';
+import '../features/post/presentation/similar_posts_screen.dart';
 import '../features/providers/presentation/provider_check_screen.dart';
 import '../features/providers/presentation/provider_form_screen.dart';
 import '../features/providers/presentation/providers_screen.dart';
@@ -40,6 +41,14 @@ final appRouterProvider = Provider<GoRouter>((ref) {
               initialPost: state.extra is Post ? state.extra! as Post : null,
             ),
           ),
+          GoRoute(
+            path: '/post/:providerId/:postId/similar',
+            builder: (context, state) => SimilarPostsScreen(
+              providerId: state.pathParameters['providerId']!,
+              postId: state.pathParameters['postId']!,
+              initialPost: state.extra is Post ? state.extra! as Post : null,
+            ),
+          ),
           GoRoute(
             path: '/favorites',
             builder: (context, state) => const FavoritesScreen(),