Major Enhancement: NestJS Migration + CASL Authorization + Error Handling

Complete rewrite from Express to NestJS with enterprise-grade features:

## Backend Improvements
- Migrated from Express to NestJS 11.0.1 with TypeScript
- Implemented Prisma ORM 7.3.0 for type-safe database access
- Added CASL authorization system replacing role-based guards
- Created global exception filters with structured logging
- Implemented Auth0 JWT authentication with Passport.js
- Added vehicle management with conflict detection
- Enhanced event scheduling with driver/vehicle assignment
- Comprehensive error handling and logging

## Frontend Improvements
- Upgraded to React 19.2.0 with Vite 7.2.4
- Implemented CASL-based permission system
- Added AbilityContext for declarative permissions
- Created ErrorHandler utility for consistent error messages
- Enhanced API client with request/response logging
- Added War Room (Command Center) dashboard
- Created VIP Schedule view with complete itineraries
- Implemented Vehicle Management UI
- Added mock data generators for testing (288 events across 20 VIPs)

## New Features
- Vehicle fleet management (types, capacity, status tracking)
- Complete 3-day Jamboree schedule generation
- Individual VIP schedule pages with PDF export (planned)
- Real-time War Room dashboard with auto-refresh
- Permission-based navigation filtering
- First user auto-approval as administrator

## Documentation
- Created CASL_AUTHORIZATION.md (comprehensive guide)
- Created ERROR_HANDLING.md (error handling patterns)
- Updated CLAUDE.md with new architecture
- Added migration guides and best practices

## Technical Debt Resolved
- Removed custom authentication in favor of Auth0
- Replaced role checks with CASL abilities
- Standardized error responses across API
- Implemented proper TypeScript typing
- Added comprehensive logging

Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>

backend-old-20260125/.env.example

@@ -0,0 +1,37 @@
+# ============================================
+# Auth0 Configuration (NEW)
+# ============================================
+AUTH0_DOMAIN=your-tenant.us.auth0.com
+AUTH0_CLIENT_ID=your_client_id_here
+AUTH0_CLIENT_SECRET=your_client_secret_here
+AUTH0_AUDIENCE=https://vip-coordinator-api
+AUTH0_API_ID=6910ee5a03672ebf6f04fc1c
+AUTH0_CALLBACK_URL=http://localhost:3000/auth/auth0/callback
+AUTH0_LOGOUT_URL=http://localhost:5173/login
+
+# ============================================
+# Application Configuration
+# ============================================
+PORT=3000
+NODE_ENV=development
+FRONTEND_URL=http://localhost:5173
+
+# ============================================
+# Database Configuration
+# ============================================
+DATABASE_URL=postgresql://postgres:changeme@db:5432/vip_coordinator
+
+# ============================================
+# Redis Configuration
+# ============================================
+REDIS_URL=redis://redis:6379
+
+# ============================================
+# Legacy Google OAuth (REMOVE THESE)
+# These are no longer needed with Auth0
+# ============================================
+# GOOGLE_CLIENT_ID=
+# GOOGLE_CLIENT_SECRET=
+# GOOGLE_REDIRECT_URI=
+# JWT_SECRET=
+# ADMIN_PASSWORD=