Add ticket system with QR scanner and PDF generation

- Add ticket validation and check-in API endpoints
- Add PDF ticket generation with QR codes (pdfkit)
- Add admin QR scanner page with camera support
- Add admin site settings page
- Update email templates with PDF ticket download link
- Add checked_in_by_admin_id field for audit tracking
- Update booking success page with ticket download
- Various UI improvements to events and booking pages

backend/src/index.ts

@@ -19,6 +19,7 @@ import lnbitsRoutes from './routes/lnbits.js';
 import emailsRoutes from './routes/emails.js';
 import paymentOptionsRoutes from './routes/payment-options.js';
 import dashboardRoutes from './routes/dashboard.js';
+import siteSettingsRoutes from './routes/site-settings.js';
 import emailService from './lib/email.js';
 
 const app = new Hono();
@@ -1712,6 +1713,7 @@ app.route('/api/lnbits', lnbitsRoutes);
 app.route('/api/emails', emailsRoutes);
 app.route('/api/payment-options', paymentOptionsRoutes);
 app.route('/api/dashboard', dashboardRoutes);
+app.route('/api/site-settings', siteSettingsRoutes);
 
 // 404 handler
 app.notFound((c) => {