Add PostgreSQL support with SQLite/Postgres database compatibility layer

- Add dbGet/dbAll helper functions for database-agnostic queries
- Add toDbBool/convertBooleansForDb for boolean type conversion
- Add toDbDate/getNow for timestamp type handling
- Add generateId that returns UUID for Postgres, nanoid for SQLite
- Update all routes to use compatibility helpers
- Add normalizeEvent to return clean number types from Postgres decimal
- Add formatPrice utility for consistent price display
- Add legal pages admin interface with RichTextEditor
- Update carousel images
- Add drizzle migration files for PostgreSQL

frontend/src/app/(public)/booking/[ticketId]/page.tsx

@@ -5,6 +5,7 @@ import { useParams, useSearchParams } from 'next/navigation';
 import Link from 'next/link';
 import { useLanguage } from '@/context/LanguageContext';
 import { ticketsApi, paymentOptionsApi, Ticket, PaymentOptionsConfig } from '@/lib/api';
+import { formatPrice } from '@/lib/utils';
 import Card from '@/components/ui/Card';
 import Button from '@/components/ui/Button';
 import { 
@@ -341,7 +342,7 @@ export default function BookingPaymentPage() {
                 <div className="flex items-center gap-3">
                   <CurrencyDollarIcon className="w-5 h-5 text-primary-yellow" />
                   <span className="font-bold text-lg">
-                    {ticket.event.price?.toLocaleString()} {ticket.event.currency}
+                    {ticket.event.price !== undefined ? formatPrice(ticket.event.price, ticket.event.currency) : ''}
                   </span>
                 </div>
               </div>
@@ -374,7 +375,7 @@ export default function BookingPaymentPage() {
                 {locale === 'es' ? 'Monto a pagar' : 'Amount to pay'}
               </p>
               <p className="text-2xl font-bold text-primary-dark">
-                {ticket.event?.price?.toLocaleString()} {ticket.event?.currency}
+                {ticket.event?.price !== undefined ? formatPrice(ticket.event.price, ticket.event.currency) : ''}
               </p>
             </div>