test(worker): lib/api + app/nav — fill gaps + lifecycle test

apps/worker/src/App.test.tsx

@@ -42,4 +42,20 @@ describe('App', () => {
     expect(tabbar.getByText('Geschiedenis')).toBeInTheDocument();
     expect(tabbar.getByText('Account')).toBeInTheDocument();
   });
+
+  it('lifecycle: unauthenticated renders Login (no nav); authenticated renders Stopwatch under the tab bar', () => {
+    // No token -> the Login screen, and no tab bar navigation.
+    clearToken();
+    const { unmount } = renderApp();
+    expect(screen.getByText('E-mailadres')).toBeInTheDocument();
+    expect(screen.queryByRole('navigation')).not.toBeInTheDocument();
+    unmount();
+
+    // Token present -> the Stopwatch screen is mounted at "/" beside the tab bar.
+    setToken('tok');
+    renderApp();
+    expect(screen.getByText('Type zool')).toBeInTheDocument();
+    expect(within(screen.getByRole('navigation')).getByText('Stopwatch')).toBeInTheDocument();
+    expect(screen.queryByText('E-mailadres')).not.toBeInTheDocument();
+  });
 });