Cursor Prompt: Optimize App Performance

Optimize this Next.js application for performance:

1. Add React.memo() to components that re-render unnecessarily
2. Implement code splitting with dynamic imports for heavy components
3. Optimize images: convert to WebP, add proper width/height, use next/image
4. Add loading skeletons for async data
5. Implement virtual scrolling for long lists (>100 items)
6. Move heavy computations to Web Workers or useMemo
7. Add proper caching headers for static assets
8. Minimize bundle size: identify and remove unused dependencies

Measure before/after using Lighthouse scores. Target: Performance > 90.