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>

frontend/nginx.conf

@@ -1,54 +0,0 @@
-# Custom PID file location for non-root user
-pid /tmp/nginx/nginx.pid;
-
-events {
-    worker_connections 1024;
-}
-
-http {
-    include       /etc/nginx/mime.types;
-    default_type  application/octet-stream;
-    
-    sendfile        on;
-    keepalive_timeout  65;
-    
-    # Gzip compression
-    gzip on;
-    gzip_vary on;
-    gzip_min_length 1024;
-    gzip_types text/plain text/css text/xml text/javascript application/javascript application/xml+rss application/json;
-    
-    server {
-        listen 80;
-        server_name localhost;
-        root /usr/share/nginx/html;
-        index index.html;
-        
-        # Handle client-side routing
-        location / {
-            try_files $uri $uri/ /index.html;
-        }
-        
-        # API proxy to backend
-        location /api/ {
-            proxy_pass http://backend:3000/api/;
-            proxy_set_header Host $host;
-            proxy_set_header X-Real-IP $remote_addr;
-            proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
-            proxy_set_header X-Forwarded-Proto $scheme;
-        }
-        
-        # Security headers
-        add_header X-Frame-Options "SAMEORIGIN" always;
-        add_header X-XSS-Protection "1; mode=block" always;
-        add_header X-Content-Type-Options "nosniff" always;
-        add_header Referrer-Policy "no-referrer-when-downgrade" always;
-        add_header Content-Security-Policy "default-src 'self' http: https: data: blob: 'unsafe-inline'" always;
-        
-        # Cache static assets
-        location ~* \.(js|css|png|jpg|jpeg|gif|ico|svg)$ {
-            expires 1y;
-            add_header Cache-Control "public, immutable";
-        }
-    }
-}