♿️(frontend) use aria-haspopup menu on DropButton triggers

Replace aria-haspopup true with menu on DropButton

CHANGELOG.md

@@ -6,6 +6,10 @@ and this project adheres to
 
 ## [Unreleased]
 
+### Changed
+
+- ♿(frontend) use aria-haspopup menu on DropButton triggers #2126
+
 ## [v4.8.4] - 2026-03-25
 
 ### Added

src/frontend/apps/impress/src/components/DropButton.tsx

@@ -93,7 +93,7 @@ export const DropButton = ({
           onOpenChangeHandler(true);
         }}
         aria-label={label}
-        aria-haspopup="true"
+        aria-haspopup="menu"
         aria-expanded={isLocalOpen}
         data-testid={testId}
         $css={css`

src/frontend/apps/impress/src/components/dropdown-menu/__tests__/DropdownMenu.spec.tsx

@@ -94,7 +94,7 @@ describe('<DropdownMenu />', () => {
     );
 
     const trigger = screen.getByRole('button', { name: 'Select language' });
-    expect(trigger).toHaveAttribute('aria-haspopup', 'true');
+    expect(trigger).toHaveAttribute('aria-haspopup', 'menu');
     expect(trigger).toHaveAttribute('aria-expanded', 'false');
 
     await userEvent.click(trigger);