feat: add sentry monitoring

[yilmazbahadir]

Summary

Add Sentry error monitoring and performance tracking to lattice-manager. This provides real-time error tracking, performance monitoring, and session replay capabilities to help identify and debug production issues.

Changes

• Added @sentry/react (v10.17.0) for error monitoring
• Initialized Sentry SDK in src/index.tsx with:
  • Browser tracing for performance monitoring
  • Session replay (10% of sessions, 100% on errors)
  • Release tracking via APP_VERSION
• Added Error Boundary in src/App.tsx to catch React errors with fallback UI
• Added environment variables:
  • VITE_SENTRY_DSN - Sentry project DSN
  • VITE_SENTRY_ENVIRONMENT - Environment name (defaults to "production")
• Updated Vite config to expose Sentry config as global constants
• Added TypeScript declarations for Sentry globals

Configuration

1. Go to the Sentry project at https://sentry.io
2. Add to .env:
   VITE_SENTRY_DSN=https://your-dsn@sentry.io/project-id
   VITE_SENTRY_ENVIRONMENT=production
3. Sentry will initialize automatically if DSN is provided

Test plan

• Set VITE_SENTRY_DSN in .env
• Run npm start
• Trigger test error in browser console: throw new Error("Test")
• Verify error appears in Sentry dashboard
• Verify session replay is captured
• Verify release version is tracked