refactor: merge profile cache into unified cache repository

apps/lib/core/di/injection.dart

@@ -25,6 +25,7 @@ import '../../features/friends/data/friends_api.dart';
 import '../../features/messages/data/inbox_api.dart';
 import '../../features/settings/data/settings_api.dart';
 import '../../features/settings/data/services/settings_user_cache.dart';
+import '../../features/settings/data/services/user_profile_cache_repository.dart';
 import '../../features/users/data/users_api.dart';
 import '../../features/todo/data/todo_api.dart';
 
@@ -76,6 +77,12 @@ Future<void> configureDependencies() async {
   final usersApi = UsersApi(apiClient);
   sl.registerSingleton<UsersApi>(usersApi);
 
+  final userProfileCacheRepository = UserProfileCacheRepository(
+    store: hybridCacheStore,
+    remoteLoader: usersApi.getMe,
+  );
+  sl.registerSingleton<UserProfileCacheRepository>(userProfileCacheRepository);
+
   final calendarApi = CalendarApi(apiClient);
   sl.registerSingleton<CalendarApi>(calendarApi);
 
@@ -100,7 +107,9 @@ Future<void> configureDependencies() async {
   final settingsApi = SettingsApi(apiClient);
   sl.registerSingleton<SettingsApi>(settingsApi);
 
-  sl.registerSingleton<SettingsUserCache>(SettingsUserCache());
+  sl.registerSingleton<SettingsUserCache>(
+    SettingsUserCache(userProfileCacheRepository),
+  );
 
   final inboxApi = InboxApi(apiClient);
   sl.registerSingleton<InboxApi>(inboxApi);