✅(frontend) fix failing test

Modification of the create doc button added the need for useRouter to be mounted during testing.
This adds a mock function to allow for testing.

src/frontend/apps/impress/src/__tests__/pages.test.tsx

@@ -5,14 +5,23 @@ import { AppWrapper } from '@/tests/utils';
 
 import Page from '../pages';
 
+// Mock the useRouter hook
+jest.mock('next/navigation', () => ({
+  useRouter() {
+    return {
+      push: jest.fn(),
+    };
+  },
+}));
+
 describe('Page', () => {
   it('checks Page rendering', () => {
     render(<Page />, { wrapper: AppWrapper });
 
     expect(
       screen.getByRole('button', {
         name: /Create a new document/i,
-      }),
+      })
     ).toBeInTheDocument();
   });
 });