feat(github): add mock GitHub API response for local development

[evirunurm]

Summary

• Adds MOCK_RESPONSE fixture in scripts/github/__mock__/mockGithubApiResponse.ts with realistic fake data (repos, stars, forks, languages, followers, contributions)
• githubApiClient.ts short-circuits to the mock when MOCK_GITHUB=true is set in .env, skipping real GitHub API calls
• Enables running the project locally without a valid GITHUB_TOKEN

Test plan

• Add MOCK_GITHUB=true to .env
• Run vercel dev
• Hit http://localhost:3000/api/stats?username=anyone — should return an SVG card
• Hit http://localhost:3000/api/languages?username=anyone — should return an SVG card
• Remove MOCK_GITHUB=true and verify real API calls still work with a valid token

---

🤖 Generated with Claude Code

[vercel]

The latest updates on your projects. Learn more about Vercel for GitHub.

Project	Deployment	Actions	Updated (UTC)
github-stats-uvqq	Ready	Preview, Comment	Mar 20, 2026 2:02am