docs: add comprehensive code comments, update README and TASKS, create training and troubleshooting guides

- Add JSDoc comments to API routes and business logic functions
- Update README.md with Phase 2 status and deployment/production notes
- Enhance TASKS.md with estimated timelines and dependencies
- Create docs/STAFF_TRAINING.md for team onboarding
- Create docs/CLIENT_ONBOARDING.md for customer experience
- Create docs/OPERATIONAL_PROCEDURES.md for daily operations
- Create docs/TROUBLESHOOTING.md for common setup issues
- Fix TypeScript errors in hq/page.tsx

app/kiosk/[locationId]/page.tsx

@@ -7,6 +7,7 @@ import { BookingConfirmation } from '@/components/kiosk/BookingConfirmation'
 import { WalkInFlow } from '@/components/kiosk/WalkInFlow'
 import { Calendar, UserPlus, MapPin, Clock } from 'lucide-react'
 
+/** @description Kiosk interface component for location-based check-in confirmations and walk-in booking creation. */
 export default function KioskPage({ params }: { params: { locationId: string } }) {
   const [apiKey, setApiKey] = useState<string | null>(null)
   const [location, setLocation] = useState<any>(null)