🎨 Palette: 접근 관리 버튼 포커스 접근성 개선

.jules/palette.md

@@ -57,3 +57,6 @@
 ## 2026-07-30 - Add window.confirm for destructive actions
 **Learning:** Destructive actions like deleting groups and edge relationships previously occurred immediately without user confirmation.
 **Action:** Always wrap delete operations with window.confirm() dialogs and ensure corresponding tests successfully mock window.confirm.
+## 2026-09-05 - Use aria-disabled for focusable disabled buttons
+**Learning:** Using the native disabled attribute prevents focus, making descriptive hints (like aria-describedby) undiscoverable by keyboard users.
+**Action:** Use aria-disabled={true} and preventDefault with inline styles for disabled buttons that require explanation.

frontend/src/components/modals/ExportModal.test.tsx

@@ -1,5 +1,6 @@
 import '@testing-library/jest-dom/vitest';
 import { cleanup, fireEvent, render, screen } from '@testing-library/react';
+import userEvent from '@testing-library/user-event';
 import { afterEach, describe, expect, it, vi } from 'vitest';
 
 import { ExportModal } from './ExportModal';
@@ -171,13 +172,18 @@ describe('ExportModal', () => {
     expect(screen.getByRole('button', { name: '데이터 사전 Markdown 내보내기' })).toBeDisabled();
   });
 
-  it('exposes access-control guidance for disabled button', () => {
+  it('exposes access-control guidance for disabled button', async () => {
+    const user = userEvent.setup();
     render(<ExportModal {...baseProps} canCreateShareLink={false} />);
 
     expect(screen.getByText('접근 권한 관리는 프로젝트 권한 설정에서 처리합니다.')).toBeInTheDocument();
     const accessManagementButton = screen.getByRole('button', { name: '접근 관리' });
-    expect(accessManagementButton).toBeDisabled();
+    expect(accessManagementButton).toHaveAttribute('aria-disabled', 'true');
     expect(accessManagementButton).toHaveAttribute('aria-describedby', 'share-export-access-hint');
     expect(accessManagementButton).not.toHaveAttribute('title');
+
+    accessManagementButton.focus();
+    expect(accessManagementButton).toHaveFocus();
+    await user.keyboard('{Enter}');
   });
 });

frontend/src/components/modals/ExportModal.tsx

@@ -202,7 +202,9 @@ export function ExportModal({
               )}
               <button
                 type="button"
-                disabled
+                aria-disabled={true}
+                onClick={(e) => e.preventDefault()}
+                style={{ opacity: 0.5, cursor: 'not-allowed' }}
                 aria-describedby="share-export-access-hint"
                 className="exportModal__disabledHintButton"
               >