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/middleware/validation.js

@@ -0,0 +1,78 @@
+"use strict";
+Object.defineProperty(exports, "__esModule", { value: true });
+exports.validateParams = exports.validateQuery = exports.validate = void 0;
+const zod_1 = require("zod");
+const errors_1 = require("../types/errors");
+const validate = (schema) => {
+    return async (req, res, next) => {
+        try {
+            // Validate request body
+            req.body = await schema.parseAsync(req.body);
+            next();
+        }
+        catch (error) {
+            if (error instanceof zod_1.ZodError) {
+                // Format Zod errors into a user-friendly message
+                const errors = error.errors.map(err => ({
+                    field: err.path.join('.'),
+                    message: err.message
+                }));
+                const message = errors.map(e => `${e.field}: ${e.message}`).join(', ');
+                next(new errors_1.ValidationError(message));
+            }
+            else {
+                next(error);
+            }
+        }
+    };
+};
+exports.validate = validate;
+const validateQuery = (schema) => {
+    return async (req, res, next) => {
+        try {
+            // Validate query parameters
+            req.query = await schema.parseAsync(req.query);
+            next();
+        }
+        catch (error) {
+            if (error instanceof zod_1.ZodError) {
+                // Format Zod errors into a user-friendly message
+                const errors = error.errors.map(err => ({
+                    field: err.path.join('.'),
+                    message: err.message
+                }));
+                const message = errors.map(e => `${e.field}: ${e.message}`).join(', ');
+                next(new errors_1.ValidationError(`Invalid query parameters: ${message}`));
+            }
+            else {
+                next(error);
+            }
+        }
+    };
+};
+exports.validateQuery = validateQuery;
+const validateParams = (schema) => {
+    return async (req, res, next) => {
+        try {
+            // Validate route parameters
+            req.params = await schema.parseAsync(req.params);
+            next();
+        }
+        catch (error) {
+            if (error instanceof zod_1.ZodError) {
+                // Format Zod errors into a user-friendly message
+                const errors = error.errors.map(err => ({
+                    field: err.path.join('.'),
+                    message: err.message
+                }));
+                const message = errors.map(e => `${e.field}: ${e.message}`).join(', ');
+                next(new errors_1.ValidationError(`Invalid route parameters: ${message}`));
+            }
+            else {
+                next(error);
+            }
+        }
+    };
+};
+exports.validateParams = validateParams;
+//# sourceMappingURL=validation.js.map