refactor: deprecate i18n.t (#13039)

* refactor: deprecate i18n.t

* revert: deprecate i18n.t

This reverts commit 7dbf873a2f.

* chore: reimpl

packages/frontend/src/pages/auth.vue

@@ -25,7 +25,7 @@ SPDX-License-Identifier: AGPL-3.0-only
 				<h1>{{ i18n.ts._auth.denied }}</h1>
 			</div>
 			<div v-if="state == 'accepted' && session">
-				<h1>{{ session.app.isAuthorized ? i18n.t('already-authorized') : i18n.ts.allowed }}</h1>
+				<h1>{{ session.app.isAuthorized ? i18n.ts['already-authorized'] : i18n.ts.allowed }}</h1>
 				<p v-if="session.app.callbackUrl">
 					{{ i18n.ts._auth.callback }}
 					<MkEllipsis/>