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/package.json

@@ -0,0 +1,45 @@
+{
+  "name": "vip-coordinator-backend",
+  "version": "1.0.0",
+  "description": "Backend API for VIP Coordinator Dashboard",
+  "main": "dist/index.js",
+  "scripts": {
+    "start": "node dist/index.js",
+    "dev": "npx tsx src/index.ts",
+    "build": "tsc",
+    "test": "echo \"Error: no test specified\" && exit 1"
+  },
+  "keywords": [
+    "vip",
+    "coordinator",
+    "dashboard",
+    "api"
+  ],
+  "author": "",
+  "license": "ISC",
+  "dependencies": {
+    "auth0": "^5.2.0",
+    "cors": "^2.8.5",
+    "dotenv": "^16.3.1",
+    "express": "^4.18.2",
+    "express-jwt": "^8.5.1",
+    "express-openid-connect": "^2.19.4",
+    "jsonwebtoken": "^9.0.2",
+    "jwks-rsa": "^3.2.2",
+    "pg": "^8.11.3",
+    "redis": "^4.6.8",
+    "uuid": "^9.0.0"
+  },
+  "devDependencies": {
+    "@types/cors": "^2.8.13",
+    "@types/express": "^4.17.17",
+    "@types/jsonwebtoken": "^9.0.2",
+    "@types/node": "^20.5.0",
+    "@types/pg": "^8.10.2",
+    "@types/uuid": "^9.0.2",
+    "ts-node": "^10.9.1",
+    "ts-node-dev": "^2.0.0",
+    "tsx": "^4.7.0",
+    "typescript": "^5.6.0"
+  }
+}