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/dist/services/jwtKeyManager.d.ts

@@ -0,0 +1,38 @@
+export interface User {
+    id: string;
+    google_id: string;
+    email: string;
+    name: string;
+    profile_picture_url?: string;
+    role: 'driver' | 'coordinator' | 'administrator';
+    status?: 'pending' | 'active' | 'deactivated';
+    created_at?: string;
+    last_login?: string;
+    is_active?: boolean;
+    updated_at?: string;
+    approval_status?: string;
+    onboardingData?: any;
+}
+declare class JWTKeyManager {
+    private currentSecret;
+    private previousSecret;
+    private rotationInterval;
+    private gracePeriodTimeout;
+    constructor();
+    private generateSecret;
+    private startRotation;
+    private rotateKey;
+    generateToken(user: User): string;
+    verifyToken(token: string): User | null;
+    getStatus(): {
+        hasCurrentKey: boolean;
+        hasPreviousKey: boolean;
+        rotationActive: boolean;
+        gracePeriodActive: boolean;
+    };
+    destroy(): void;
+    forceRotation(): void;
+}
+export declare const jwtKeyManager: JWTKeyManager;
+export default jwtKeyManager;
+//# sourceMappingURL=jwtKeyManager.d.ts.map