perf: implement performance monitoring and optimization strategy

[phrazzld]

Description

The application lacks performance monitoring and optimization strategy, which is needed to ensure good user experience and identify performance bottlenecks.

Performance Gaps

Missing Monitoring:

• No performance metrics collection
• No bundle size monitoring
• No runtime performance tracking
• No Core Web Vitals measurement

Potential Issues:

• Large bundle sizes from unoptimized imports
• No image optimization strategy
• Missing performance budgets
• No lazy loading implementation

Required Implementation

1. Performance Monitoring

• Implement Web Vitals tracking
• Add bundle analyzer to build process
• Set up performance budgets
• Add performance metrics to CI

2. Bundle Optimization

• Analyze and optimize bundle sizes
• Implement proper code splitting
• Add dynamic imports for heavy components
• Optimize third-party dependencies

3. Runtime Performance

• Add React DevTools Profiler integration
• Implement proper memoization strategies
• Optimize expensive computations
• Add performance monitoring in production

4. Asset Optimization

• Implement proper image optimization
• Add lazy loading for images and components
• Optimize font loading strategies
• Implement service worker for caching

Acceptance Criteria

• Performance monitoring dashboard implemented
• Bundle size reduced by at least 20%
• All Core Web Vitals metrics in green
• Performance budgets enforced in CI
• Comprehensive optimization documentation

Priority

MEDIUM - Important for user experience and application scalability.