Lighthouse Performance Auditing & Fixes

I'll run comprehensive Lighthouse audits for performance, accessibility, SEO, and best practices, then implement prioritized fixes automatically.

Audit Categories:

• Performance (Core Web Vitals: LCP, FID, CLS)
• Accessibility (WCAG compliance)
• SEO (Search engine optimization)
• Best Practices (Security, modern standards)
• PWA (Progressive Web App)

Arguments: $ARGUMENTS - optional: URL to audit (defaults to http://localhost:3000) or mobile/desktop