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/package.json

@@ -23,7 +23,9 @@
     "jose": "^5.4.0",
     "nanoid": "^5.0.7",
     "nodemailer": "^7.0.13",
+    "pdfkit": "^0.17.2",
     "pg": "^8.12.0",
+    "qrcode": "^1.5.4",
     "zod": "^3.23.8"
   },
   "devDependencies": {
@@ -31,7 +33,9 @@
     "@types/better-sqlite3": "^7.6.10",
     "@types/node": "^20.14.9",
     "@types/nodemailer": "^7.0.9",
+    "@types/pdfkit": "^0.17.4",
     "@types/pg": "^8.11.6",
+    "@types/qrcode": "^1.5.6",
     "drizzle-kit": "^0.22.8",
     "tsx": "^4.15.7",
     "typescript": "^5.5.2"