feat(localization): expand language support and enhance UI for user settings

- Added support for additional UI locales including Cebuano and Spanish, improving accessibility for a broader user base.
- Updated language selection components in the AppHeader and SettingsWidget to reflect new language options, enhancing user experience.
- Enhanced localization of various UI elements across components, ensuring consistent language representation and improved user engagement.
- Implemented logic to synchronize user language preferences with backend settings, providing a seamless experience when changing languages.

frontend/src/views/social/FriendsView.vue

@@ -2,18 +2,18 @@
     <div class="friends-view">
         <section class="friends-hero surface-card">
             <div>
-                <span class="friends-kicker">Community</span>
+                <span class="friends-kicker">{{ $t('friends.kicker') }}</span>
                 <h2>{{ $t('friends.title') }}</h2>
-                <p>Freundschaften, offene Anfragen und laufende Kontakte an einem Ort.</p>
+                <p>{{ $t('friends.intro') }}</p>
             </div>
             <div class="friends-stats">
                 <div class="friends-stat surface-card">
                     <strong>{{ tabs[0].data.length }}</strong>
-                    <span>Bestehend</span>
+                    <span>{{ $t('friends.stats.existing') }}</span>
                 </div>
                 <div class="friends-stat surface-card">
                     <strong>{{ tabs[1].data.length + tabs[2].data.length }}</strong>
-                    <span>Offen</span>
+                    <span>{{ $t('friends.stats.open') }}</span>
                 </div>
             </div>
         </section>