test(github): verify wrapped date range (JhaSourav07#1110)

## Description

Fixes JhaSourav07#1061

Added test coverage verifying that `getWrappedData` passes the correct
year-specific `from` and `to` date range when fetching GitHub
contribution data.

## Pillar

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

## Visual Preview

Not applicable — test-only change.

## Checklist before requesting a review:

* [x] I have read the `CONTRIBUTING.md` file.
* [x] I have tested these changes locally
(`localhost:3000/api/streak?user=YOUR_USERNAME`).
* [x] I have run `npm run format` and `npm run lint` locally and
resolved all errors (CI will fail otherwise).
* [x] 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.
* [x] I have started the repo.
* [x] I have made sure that i have only one commit to merge in this PR.
* [x] The SVG output matches the CommitPulse "premium quality" aesthetic
standard (no raw elements, smooth animations, correct fonts).
* [x] (Recommended) I joined the CommitPulse Discord community for
contributor discussions, mentorship, and faster PR support.

Author: JhaSourav07

lib/github.test.ts

@@ -992,22 +992,31 @@ describe('getWrappedData', () => {
   beforeEach(() => {
     vi.spyOn(global, 'fetch');
   });
+
   afterEach(() => {
     vi.restoreAllMocks();
   });
 
   it('returns wrapped statistics and top language correctly', async () => {
     vi.mocked(fetch).mockImplementation(async (url) => {
       const urlStr = typeof url === 'string' ? url : (url?.toString() ?? '');
-      // Return 2 TS repos, 1 Rust repo
-      if (urlStr.includes('/repos'))
+
+      if (urlStr.includes('/repos')) {
         return mockResponse([
           { language: 'TypeScript' },
           { language: 'TypeScript' },
           { language: 'Rust' },
         ]);
+      }
+
       return mockResponse({
-        data: { user: { contributionsCollection: { contributionCalendar: mockCalendar } } },
+        data: {
+          user: {
+            contributionsCollection: {
+              contributionCalendar: mockCalendar,
+            },
+          },
+        },
       });
     });
 
@@ -1016,4 +1025,35 @@ describe('getWrappedData', () => {
     expect(result.topLanguage).toBe('TypeScript');
     expect(result.totalContributions).toBe(mockCalendar.totalContributions);
   });
+
+  it('passes the correct from and to date range to GitHub contributions fetch', async () => {
+    vi.mocked(fetch).mockImplementation(async (url) => {
+      const urlStr = typeof url === 'string' ? url : (url?.toString() ?? '');
+
+      if (urlStr.includes('/repos')) {
+        return mockResponse([]);
+      }
+
+      return mockResponse({
+        data: {
+          user: {
+            contributionsCollection: {
+              contributionCalendar: mockCalendar,
+            },
+          },
+        },
+      });
+    });
+
+    await getWrappedData('octocat', '2024');
+
+    const graphQLCall = vi
+      .mocked(fetch)
+      .mock.calls.find(([url]) => url.toString().includes('/graphql'));
+
+    const body = JSON.parse(graphQLCall?.[1]?.body as string);
+
+    expect(body.variables.from).toBe('2024-01-01T00:00:00Z');
+    expect(body.variables.to).toBe('2024-12-31T23:59:59Z');
+  });
 });