feat: extend language selection in settings to all 7 supported locales

js/components/pages/page-settings.js

@@ -201,9 +201,9 @@ class PageSettings extends HTMLElement {
                         <div class="setting-item">
                             <label for="lang-select">${t('settings.language')}</label>
                             <select id="lang-select">
-                                <option value="de" ${currentLang === 'de' ? 'selected' : ''}>Deutsch</option>
-                                <option value="en" ${currentLang === 'en' ? 'selected' : ''}>English</option>
-                                <option value="fr" ${currentLang === 'fr' ? 'selected' : ''}>Français</option>
+                                ${i18n.getSupportedLocales().map(locale => `
+                                    <option value="${locale}" ${currentLang === locale ? 'selected' : ''}>${i18n.getLocaleDisplayName(locale)}</option>
+                                `).join('')}
                             </select>
                         </div>