feat(checkout): implement authentication guard for checkout route and add bank account service

src/app/app.routes.spec.ts

@@ -182,4 +182,16 @@ describe('app routes', () => {
     expect(compiled.querySelector('.tenant-status')).not.toBeNull();
     expect(compiled.textContent).toContain('No encontramos una tienda para este dominio');
   });
+
+  it('redirects unauthenticated users from /checkout to /login', async () => {
+    const { router } = await renderAppAt('/checkout', createTenantServiceStub(), createAuthServiceStub(false));
+
+    expect(router.url).toBe('/login');
+  });
+
+  it('allows authenticated users to access /checkout', async () => {
+    const { router } = await renderAppAt('/checkout', createTenantServiceStub(), createAuthServiceStub(true));
+
+    expect(router.url).toBe('/checkout');
+  });
 });