test: add accessibility test for ShareSheet close button (JhaSourav07#778)

## Description

Fixes # 741

## Pillar

- [ ] 🎨 Pillar 1 — New Theme Design
- [ ] 📐 Pillar 2 — Geometric SVG Improvement
- [ ] 🕐 Pillar 3 — Timezone Logic Optimization
- [ ] 🛠️ Other (Bug fix, refactoring, docs)

## Visual Preview

## Checklist before requesting a review:

- [ ] I have read the `CONTRIBUTING.md` file.
- [ ] I have tested these changes locally
(`localhost:3000/api/streak?user=YOUR_USERNAME`).
- [ ] I have run `npm run format` and `npm run lint` locally and
resolved all errors (CI will fail otherwise).
- [ ] My commits follow the Conventional Commits format (e.g.,
`feat(themes): ...`, `fix(calculate): ...`).
- [ ] I have updated `README.md` if I added a new theme or URL
parameter.
- [ ] I have started the repo.
- [ ] I have made sure that i have only one commit to merge in this PR.
- [ ] The SVG output matches the CommitPulse "premium quality" aesthetic
standard (no raw elements, smooth animations, correct fonts).
- [ ] (Recommended) I joined the CommitPulse Discord community for
contributor discussions, mentorship, and faster PR support.

Author: JhaSourav07

app/(root)/dashboard/[username]/page.test.tsx

@@ -46,7 +46,11 @@ vi.mock('@/components/dashboard/CommitClock', () => ({
 }));
 
 vi.mock('@/components/dashboard/Heatmap', () => ({
-  default: () => <div data-testid="heatmap">Heatmap</div>,
+  default: ({ data }: { data: unknown[] }) => (
+    <div data-testid="heatmap" data-prop={JSON.stringify(data)}>
+      Heatmap
+    </div>
+  ),
 }));
 
 vi.mock('@/components/dashboard/AIInsights', () => ({
@@ -121,7 +125,9 @@ describe('DashboardPage', () => {
         bypassCache: false,
       });
 
-      expect(screen.getByText('Generate Your Own Dashboard')).toBeDefined();
+      const generateLink = screen.getByText('Generate Your Own Dashboard').closest('a');
+      expect(generateLink).toBeDefined();
+      expect(generateLink?.getAttribute('href')).toBe('/');
       expect(screen.getByTestId('profile-card')).toBeDefined();
       expect(screen.getByTestId('activity-landscape')).toBeDefined();
       expect(screen.getByTestId('language-chart')).toBeDefined();
@@ -135,4 +141,15 @@ describe('DashboardPage', () => {
       expect(screen.getByText('Contributions: 500')).toBeDefined();
     });
   });
+  it('passes the correct activity data to Heatmap', async () => {
+    const PageContent = await DashboardPage({
+      params: Promise.resolve({ username: 'octocat' }),
+      searchParams: Promise.resolve({}),
+    });
+
+    render(PageContent);
+
+    const heatmap = screen.getByTestId('heatmap');
+    expect(JSON.parse(heatmap.getAttribute('data-prop') ?? '[]')).toEqual(mockData.activity);
+  });
 });

components/dashboard/ShareSheet.test.tsx

@@ -89,6 +89,17 @@ describe('ShareSheet', () => {
     expect(screen.getByText('Share on X')).toBeDefined();
     expect(screen.getByText('Download JSON')).toBeDefined();
   });
+  it('renders close button with correct aria-label and calls onClose', () => {
+    render(<ShareSheet {...defaultProps} />);
+
+    const closeButton = screen.getByLabelText('Close share options panel');
+
+    expect(closeButton).toBeDefined();
+
+    fireEvent.click(closeButton);
+
+    expect(defaultProps.onClose).toHaveBeenCalled();
+  });
 
   it('calls onClose when close button is clicked', () => {
     render(<ShareSheet {...defaultProps} />);