chore: remove unused packages, imports, and stale type definitions

- Remove @casl/prisma (unused) from backend
- Remove @heroicons/react (unused, using lucide-react) from frontend
- Remove unused InferSubjects import from ability.factory.ts
- Remove unused Calendar import from Dashboard.tsx
- Delete stale frontend/src/lib/types.ts (duplicate of src/types/index.ts)

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

frontend/src/lib/types.ts

@@ -1,126 +0,0 @@
-/**
- * TypeScript interfaces for VIP Coordinator
- */
-
-export interface VIP {
-  id: string;
-  name: string;
-  organization?: string;
-  department: 'OFFICE_OF_DEVELOPMENT' | 'ADMIN';
-  arrivalMode: 'FLIGHT' | 'SELF_DRIVING';
-  expectedArrival?: string;
-  airportPickup: boolean;
-  venueTransport: boolean;
-  notes?: string;
-  createdAt: string;
-  updatedAt: string;
-  deletedAt?: string;
-}
-
-export interface Driver {
-  id: string;
-  name: string;
-  phone: string;
-  department?: 'OFFICE_OF_DEVELOPMENT' | 'ADMIN';
-  userId?: string;
-  shiftStartTime?: string;
-  shiftEndTime?: string;
-  isAvailable: boolean;
-  createdAt: string;
-  updatedAt: string;
-  deletedAt?: string;
-}
-
-export interface ScheduleEvent {
-  id: string;
-  vipId: string;
-  vip?: VIP;
-  title: string;
-  pickupLocation?: string;
-  dropoffLocation?: string;
-  location?: string;
-  startTime: string;
-  endTime: string;
-  actualStartTime?: string;
-  actualEndTime?: string;
-  description?: string;
-  type: 'TRANSPORT' | 'MEETING' | 'EVENT' | 'MEAL' | 'ACCOMMODATION';
-  status: 'SCHEDULED' | 'IN_PROGRESS' | 'COMPLETED' | 'CANCELLED';
-  driverId?: string;
-  driver?: Driver;
-  vehicleId?: string;
-  eventId?: string;
-  event?: Event;
-  notes?: string;
-  createdAt: string;
-  updatedAt: string;
-  deletedAt?: string;
-}
-
-export interface EventTemplate {
-  id: string;
-  name: string;
-  description?: string;
-  defaultDuration: number; // in minutes
-  location?: string;
-  type: 'TRANSPORT' | 'MEETING' | 'EVENT' | 'MEAL' | 'ACCOMMODATION';
-  createdAt: string;
-  updatedAt: string;
-  deletedAt?: string;
-  _count?: {
-    events: number;
-  };
-}
-
-export interface Event {
-  id: string;
-  name: string;
-  description?: string;
-  startTime: string;
-  endTime: string;
-  location: string;
-  type: 'TRANSPORT' | 'MEETING' | 'EVENT' | 'MEAL' | 'ACCOMMODATION';
-  templateId?: string;
-  template?: EventTemplate;
-  attendees: EventAttendance[];
-  scheduleTasks?: ScheduleEvent[];
-  createdAt: string;
-  updatedAt: string;
-  deletedAt?: string;
-  _count?: {
-    attendees: number;
-    scheduleTasks: number;
-  };
-}
-
-export interface EventAttendance {
-  id: string;
-  eventId: string;
-  vipId: string;
-  vip: VIP;
-  addedAt: string;
-}
-
-export interface CreateEventTemplateDto {
-  name: string;
-  description?: string;
-  defaultDuration: number;
-  location?: string;
-  type: 'TRANSPORT' | 'MEETING' | 'EVENT' | 'MEAL' | 'ACCOMMODATION';
-}
-
-export interface CreateEventDto {
-  name: string;
-  description?: string;
-  startTime: string;
-  endTime: string;
-  location: string;
-  type: 'TRANSPORT' | 'MEETING' | 'EVENT' | 'MEAL' | 'ACCOMMODATION';
-  templateId?: string;
-}
-
-export interface AddVipsToEventDto {
-  vipIds: string[];
-  pickupMinutesBeforeEvent?: number;
-  pickupLocationOverride?: string;
-}

frontend/src/pages/Dashboard.tsx

@@ -1,6 +1,6 @@
 import { useQuery } from '@tanstack/react-query';
 import { api } from '@/lib/api';
-import { Users, Car, Calendar, Plane, Clock } from 'lucide-react';
+import { Users, Car, Plane, Clock } from 'lucide-react';
 import { VIP, Driver, ScheduleEvent } from '@/types';
 import { formatDateTime } from '@/lib/utils';