fix(themes): offline banner for the Theme Store (#1013)

* fix(themes): show an offline banner when the Theme Store is unavailable

When the registry can't be fetched and no catalogue is cached, the store
now shows a clear offline banner (icon, message, retry) in place of the
list, and hides the search/filter toolbar — there is nothing to browse.
The cached-catalogue fallback with its offline indicator is unchanged, so
the store still works offline when a catalogue was previously cached.

* docs(themes): note the offline-banner PR in the Theme Store entry

Add PR #1013 to the still-unreleased Theme Store changelog and credits
entry, alongside the other follow-ups.

src/locales/de/settings.ts

@@ -336,6 +336,7 @@ export const settings = {
   themeStoreLoading: 'Themes werden geladen…',
   themeStoreError: 'Theme-Store konnte nicht geladen werden. Prüfe deine Verbindung.',
   themeStoreRetry: 'Erneut versuchen',
+  themeStoreOfflineTitle: 'Der Theme-Store ist offline',
   themeStoreEmpty: 'Keine Themes passen zu deinen Filtern.',
   themeStoreActive: 'Aktiv',
   themeStoreEnlarge: 'Vorschau vergrößern',

src/locales/en/settings.ts

@@ -403,6 +403,7 @@ export const settings = {
   themeStoreLoading: 'Loading themes…',
   themeStoreError: 'Could not load the theme store. Check your connection.',
   themeStoreRetry: 'Retry',
+  themeStoreOfflineTitle: 'The Theme Store is offline',
   themeStoreEmpty: 'No themes match your filters.',
   themeStoreActive: 'Active',
   themeStoreEnlarge: 'Enlarge preview',

src/locales/es/settings.ts

@@ -334,6 +334,7 @@ export const settings = {
   themeStoreLoading: 'Cargando temas…',
   themeStoreError: 'No se pudo cargar la tienda de temas. Comprueba tu conexión.',
   themeStoreRetry: 'Reintentar',
+  themeStoreOfflineTitle: 'La tienda de temas está sin conexión',
   themeStoreEmpty: 'Ningún tema coincide con tus filtros.',
   themeStoreActive: 'Activo',
   themeStoreEnlarge: 'Ampliar vista previa',

src/locales/fr/settings.ts

@@ -332,6 +332,7 @@ export const settings = {
   themeStoreLoading: 'Chargement des thèmes…',
   themeStoreError: 'Impossible de charger la boutique de thèmes. Vérifiez votre connexion.',
   themeStoreRetry: 'Réessayer',
+  themeStoreOfflineTitle: 'Le Theme Store est hors ligne',
   themeStoreEmpty: 'Aucun thème ne correspond à vos filtres.',
   themeStoreActive: 'Actif',
   themeStoreEnlarge: "Agrandir l'aperçu",

src/locales/nb/settings.ts

@@ -335,6 +335,7 @@ export const settings = {
   themeStoreLoading: 'Laster temaer…',
   themeStoreError: 'Kunne ikke laste temabutikken. Sjekk tilkoblingen din.',
   themeStoreRetry: 'Prøv igjen',
+  themeStoreOfflineTitle: 'Theme Store er frakoblet',
   themeStoreEmpty: 'Ingen temaer samsvarer med filtrene dine.',
   themeStoreActive: 'Aktiv',
   themeStoreEnlarge: 'Forstørr forhåndsvisning',

src/locales/nl/settings.ts

@@ -332,6 +332,7 @@ export const settings = {
   themeStoreLoading: "Thema's laden…",
   themeStoreError: 'Kan de themawinkel niet laden. Controleer je verbinding.',
   themeStoreRetry: 'Opnieuw proberen',
+  themeStoreOfflineTitle: 'De Theme Store is offline',
   themeStoreEmpty: "Geen thema's komen overeen met je filters.",
   themeStoreActive: 'Actief',
   themeStoreEnlarge: 'Voorbeeld vergroten',

src/locales/ro/settings.ts

@@ -338,6 +338,7 @@ export const settings = {
   themeStoreLoading: 'Se încarcă temele…',
   themeStoreError: 'Magazinul de teme nu a putut fi încărcat. Verifică conexiunea.',
   themeStoreRetry: 'Reîncearcă',
+  themeStoreOfflineTitle: 'Theme Store este offline',
   themeStoreEmpty: 'Nicio temă nu corespunde filtrelor tale.',
   themeStoreActive: 'Activă',
   themeStoreEnlarge: 'Mărește previzualizarea',

src/locales/ru/settings.ts

@@ -414,6 +414,7 @@ export const settings = {
   themeStoreLoading: 'Загрузка тем…',
   themeStoreError: 'Не удалось загрузить магазин тем. Проверьте подключение.',
   themeStoreRetry: 'Повторить',
+  themeStoreOfflineTitle: 'Магазин тем недоступен',
   themeStoreEmpty: 'Нет тем, соответствующих фильтрам.',
   themeStoreActive: 'Активна',
   themeStoreEnlarge: 'Увеличить превью',

src/locales/zh/settings.ts

@@ -331,6 +331,7 @@ export const settings = {
   themeStoreLoading: '正在加载主题…',
   themeStoreError: '无法加载主题商店。请检查网络连接。',
   themeStoreRetry: '重试',
+  themeStoreOfflineTitle: '主题商店已离线',
   themeStoreEmpty: '没有符合筛选条件的主题。',
   themeStoreActive: '使用中',
   themeStoreEnlarge: '放大预览',