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

frontend/src/modules/notifications/NotificationsPanel.menu.dom.test.tsx

@@ -9,7 +9,7 @@ import { afterEach, describe, expect, it, onTestFinished, vi } from "vitest";
 import { act, cleanup, fireEvent, render, screen, waitFor, within } from "@testing-library/react";
 import { QueryClient, QueryClientProvider } from "@tanstack/react-query";
 import { api, type AppNotification } from "../../lib/api";
-import type { Notification as ClientNotif } from "../../lib/notifications";
+import { raw, type Notification as ClientNotif } from "../../lib/notifications";
 
 const h = vi.hoisted(() => ({
   server: [] as unknown[],
@@ -116,7 +116,7 @@ const client = (id: number, extra: Partial<ClientNotif> = {}) =>
   ({
     id,
     level: "success",
-    message: `Activity ${id}`,
+    message: raw(`Activity ${id}`),
     requiresInteraction: false,
     ts: Date.now(),
     read: true,