feat: i18n switcher in app-frontend (#4990)

* feat: app i18n stuff

* feat: locale switching on load

* feat: db migration

* feat: polish + fade indicator impl onto TabbedModal

* fix: prepr checks

* fix: remove staging lock for language switching

* fix: lint

apps/app-frontend/src/App.vue

@@ -92,6 +92,7 @@ import {
 	isDev,
 	isNetworkMetered,
 } from '@/helpers/utils.js'
+import i18n from '@/i18n.config'
 import {
 	provideAppUpdateDownloadProgress,
 	subscribeToDownloadProgress,
@@ -224,6 +225,7 @@ async function setupApp() {
 	const {
 		native_decorations,
 		theme,
+		locale,
 		telemetry,
 		collapsed_navigation,
 		advanced_rendering,
@@ -235,6 +237,11 @@ async function setupApp() {
 		pending_update_toast_for_version,
 	} = await getSettings()
 
+	// Initialize locale from saved settings
+	if (locale) {
+		i18n.global.locale.value = locale
+	}
+
 	if (default_page === 'Library') {
 		await router.push('/library')
 	}