test(api validation): check layout query validation boundaries

Author: Shreeya1207

app/api/streak/route.test.ts

@@ -163,6 +163,14 @@ describe('GET /api/streak', () => {
       expect(fetchGitHubContributions).not.toHaveBeenCalled();
     });
 
+    it('returns 200 for unsupported ?layout query parameter values (route ignores it)', async () => {
+      const response = await GET(
+        new Request('http://localhost:3000/api/streak?user=octocat&layout=unsupported_layout')
+      );
+
+      expect(response.status).toBe(200);
+    });
+
     it('should return 200 OK and valid SVG when the optional repo query parameter is provided', async () => {
       // 1. Make request with both parameters present
       const response = await GET(makeRequest({ user: 'octocat', repo: 'commitpulse' }));