fix: address bito review nits (mockAntdWithDesktopBreakpoint reuse, dedupe button css)

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

superset-frontend/src/features/home/RightMenu.test.tsx

@@ -16,6 +16,10 @@
  * specific language governing permissions and limitations
  * under the License.
  */
+// Imported first: loading this before 'spec/helpers/testing-library' or
+// '@superset-ui/core' ensures mockAntdWithDesktopBreakpoint is defined
+// before anything transitively requires (and thus mocks) 'antd'.
+import { mockAntdWithDesktopBreakpoint } from 'spec/helpers/mobileTestUtils';
 import * as reactRedux from 'react-redux';
 import fetchMock from 'fetch-mock';
 import {
@@ -51,13 +55,7 @@ jest.mock('react-redux', () => ({
 }));
 
 // Mock useBreakpoint to return desktop breakpoints (prevents mobile menu rendering)
-jest.mock('antd', () => ({
-  ...jest.requireActual('antd'),
-  Grid: {
-    ...jest.requireActual('antd').Grid,
-    useBreakpoint: () => ({ xs: true, sm: true, md: true, lg: true, xl: true }),
-  },
-}));
+jest.mock('antd', () => mockAntdWithDesktopBreakpoint());
 
 jest.mock('src/features/databases/DatabaseModal', () => {
   const DatabaseModal = () => <span />;

superset-frontend/src/pages/MobileUnsupported/index.tsx

@@ -33,6 +33,12 @@ function MobileUnsupported() {
   const theme = useTheme();
   const history = useHistory();
 
+  const actionButtonCss = css`
+    width: 280px;
+    height: 48px;
+    font-size: ${theme.fontSizeSM}px;
+  `;
+
   const handleViewDashboards = useCallback(() => {
     history.push('/dashboard/list/');
   }, [history]);
@@ -108,11 +114,7 @@ function MobileUnsupported() {
         <Button
           buttonStyle="primary"
           onClick={handleViewDashboards}
-          css={css`
-            width: 280px;
-            height: 48px;
-            font-size: ${theme.fontSizeSM}px;
-          `}
+          css={actionButtonCss}
         >
           {t('View Dashboards')}
         </Button>
@@ -127,11 +129,7 @@ function MobileUnsupported() {
         <Button
           buttonStyle="secondary"
           onClick={handleGoHome}
-          css={css`
-            width: 280px;
-            height: 48px;
-            font-size: ${theme.fontSizeSM}px;
-          `}
+          css={actionButtonCss}
         >
           {t('Go to Welcome Page')}
         </Button>