feat(ui): migrate company relationships and save recovery

job-tracker-ui/src/locale-fetch-stability.test.tsx

@@ -13,7 +13,7 @@ function Actions() {
   return <><button onClick={() => toast("Saved", "success")}>Show feedback</button><button onClick={() => setLanguage("nb")}>Change language</button></>;
 }
 
-test("feedback does not reload company data; changing locale still reloads translated states", async () => {
+test("feedback and locale changes translate company presentation without reloading company data", async () => {
   localStorage.clear();
   (api.get as jest.Mock).mockResolvedValue({ data: [{ id: 3, name: "Acme" }] });
   render(<ToastProvider><I18nProvider><MemoryRouter><Actions /><CompaniesTable /></MemoryRouter></I18nProvider></ToastProvider>);
@@ -25,5 +25,5 @@ test("feedback does not reload company data; changing locale still reloads trans
   expect(reads()).toBe(1);
   fireEvent.click(screen.getByRole("button", { name: "Change language" }));
   await screen.findByRole("button", { name: "Rediger: Acme" });
-  await waitFor(() => expect(reads()).toBe(2));
+  await waitFor(() => expect(reads()).toBe(1));
 });