- app/not-found.tsx: root 404 with cinematic atmosphere
- app/global-error.tsx: self-contained global error boundary
- app/(pages)/error.tsx: authenticated error boundary with retry
- app/(pages)/not-found.tsx: authenticated 404 with navigation
- Upgrade existing title and person not-found pages for consistency
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
