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

frontend/src/lib/usePref.saveFailure.dom.test.ts

@@ -17,7 +17,7 @@ vi.mock("./api", () => ({ api: { savePrefs, me: vi.fn() } }));
 vi.mock("./actionErrors", () => ({ notifyActionError }));
 
 import { usePref, useSavePref } from "./usePref";
-import i18n from "../i18n";
+import { msg } from "./notifications";
 
 afterEach(() => {
   savePrefs.mockReset();
@@ -34,7 +34,7 @@ describe("a refused preference save", () => {
     const { result } = renderHook(() => usePref<boolean>("hintsOn", true), { wrapper });
     act(() => result.current[1](false));
     await waitFor(() =>
-      expect(notifyActionError).toHaveBeenCalledWith(refusal, i18n.t("errors.writeFailed.prefs")),
+      expect(notifyActionError).toHaveBeenCalledWith(refusal, msg("errors.writeFailed.prefs")),
     );
     expect(result.current[0]).toBe(false); // the local value stays; the toast says it did not save
   });
@@ -45,7 +45,7 @@ describe("a refused preference save", () => {
     const { result } = renderHook(() => useSavePref(), { wrapper });
     act(() => result.current({ stripSources: { c1: false } }));
     await waitFor(() =>
-      expect(notifyActionError).toHaveBeenCalledWith(refusal, i18n.t("errors.writeFailed.prefs")),
+      expect(notifyActionError).toHaveBeenCalledWith(refusal, msg("errors.writeFailed.prefs")),
     );
   });
 });