Fix frontend test assertions - remove inaccessible form role checks

- Update login-form.test.tsx to remove screen.getByRole('form') assertions
- Tests now check for form elements directly by label text

frontend/src/components/__tests__/login-form.test.tsx

@@ -100,8 +100,8 @@ describe('LoginForm', () => {
         target: { value: '' },
       });
       
-      const form = screen.getByRole('form');
-      expect(form).toBeInTheDocument();
+      // Form element exists with proper structure
+      expect(screen.getByLabelText(/email/i)).toBeInTheDocument();
     });
 
     it('prevents submission when password is empty', () => {
@@ -111,7 +111,7 @@ describe('LoginForm', () => {
         target: { value: '' },
       });
       
-      const form = screen.getByRole('form');
+      // Form element exists with proper structure
       expect(form).toBeInTheDocument();
     });