Add image management functionality: introduce Image entity and related API endpoints, update database schema to support image storage, and enhance UI with a new gallery feature for image selection and upload. Update translations for gallery-related terms.

frontend/src/features/admin/images/GalleryPanel.tsx

@@ -0,0 +1,15 @@
+import { useTranslation } from 'react-i18next'
+import { GalleryBrowser } from './ImageGallery'
+
+/** Отдельная страница «Галерея»: просмотр/загрузка/удаление всех изображений приложения. */
+export function GalleryPanel() {
+  const { t } = useTranslation()
+  return (
+    <div className="flex flex-col gap-4">
+      <h2 className="crt-glow text-xl font-semibold">{t('admin.gallery.title')}</h2>
+      <div className="crt-panel rounded-md p-4">
+        <GalleryBrowser />
+      </div>
+    </div>
+  )
+}