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

frontend/src/components/ui/useCopyFeedback.dom.test.ts

@@ -11,8 +11,12 @@ vi.mock("react-i18next", async (importOriginal) => ({
   useTranslation: () => ({ i18n: { language: "en" }, t: (key: string) => key }),
 }));
 vi.mock("../../lib/clipboard", () => ({ copyText: h.copyText }));
-vi.mock("../../lib/notifications", () => ({ notify: h.notify }));
+vi.mock("../../lib/notifications", async (importOriginal) => ({
+  ...(await importOriginal<typeof import("../../lib/notifications")>()),
+  notify: h.notify,
+}));
 
+import { msg } from "../../lib/notifications";
 import { useCopyFeedback } from "./useCopyFeedback";
 
 afterEach(() => {
@@ -27,7 +31,7 @@ describe("useCopyFeedback", () => {
     await act(() => result.current.copy("sfl_x"));
     expect(h.copyText).toHaveBeenCalledWith("sfl_x");
     expect(result.current.copied).toBe(true);
-    expect(h.notify).toHaveBeenCalledWith({ level: "success", message: "common.copy.done" });
+    expect(h.notify).toHaveBeenCalledWith({ level: "success", message: msg("common.copy.done") });
     act(() => void vi.advanceTimersByTime(2000));
     expect(result.current.copied).toBe(false);
   });
@@ -49,6 +53,6 @@ describe("useCopyFeedback", () => {
     const { result } = renderHook(() => useCopyFeedback());
     await act(() => result.current.copy("sfl_x"));
     expect(result.current.copied).toBe(false);
-    expect(h.notify).toHaveBeenCalledWith({ level: "warning", message: "common.copy.failed" });
+    expect(h.notify).toHaveBeenCalledWith({ level: "warning", message: msg("common.copy.failed") });
   });
 });