- Add playwright.config.ts with Chromium-only setup for Lighthouse
- Configure three test projects: chromium, mobile-chrome, and tablet
- Enable remote debugging ports (9222-9224) for Lighthouse integration
- Set up web server to auto-start Next.js dev server
- Add tests/e2e directory with setup verification test
Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>