fix(notifications): a notice keeps what to say and says it in the reader's language when shown

frontend/src/shell/App.tsx

@@ -37,6 +37,7 @@ import VerifyBanner from "./VerifyBanner";
 // pulls the release-notes loader into the eager App chunk and defeats the lazy ReleaseNotes
 // split. FRONTEND_VERSION equals the newest release note's version by release convention (both bump together).
 import { FRONTEND_VERSION } from "../lib/version";
+import { msg } from "../lib/notifications";
 
 // The page modules (and their side rails) are code-split per route: each module's definition imports
 // them lazily (features/navigation/moduleRegistry), and so does the feed's for the channel page. App
@@ -94,7 +95,7 @@ export default function App() {
     // Also from the signed-out login page, where the save 401s — `req` marks that as handled, so
     // the reporter stays quiet there.
     saveLanguage(queryClient, code).catch((e: unknown) =>
-      notifyActionError(e, t("errors.writeFailed.prefs")),
+      notifyActionError(e, msg("errors.writeFailed.prefs")),
     );
   }