feat(settings): Improve Extra Folder Paths UX with restart indicators

- Replace tooltip with restart-required icon for better visibility
- Update descriptions to accurately reflect feature purpose
- Fix toast message to show correct restart notification
- Sync i18n keys across all supported languages

templates/components/modals/settings_modal.html

@@ -537,7 +537,7 @@
                             <div class="settings-subsection-header">
                                 <h4>
                                     {{ t('settings.extraFolderPaths.title') }}
-                                    <i class="fas fa-info-circle info-icon" data-tooltip="{{ t('settings.extraFolderPaths.help') }}"></i>
+                                    <i class="fas fa-sync-alt restart-required-icon" title="{{ t('settings.extraFolderPaths.restartRequired') }}"></i>
                                 </h4>
                             </div>
                             <div class="setting-item">