feat: Merge PDF ticket generation functionality from feat/pdf-ticket branch

- Add TicketPdfGenerator service for creating PDF tickets with QR codes
- Implement download_ticket action in TicketsController
- Update ticket routes to support both ID and QR code access
- Add to_pdf method to Ticket model using TicketPdfGenerator
- Resolve conflicts between email notifications and PDF ticket features
- Maintain backward compatibility with existing QR code routes

🤖 Generated with [Claude Code](https://claude.ai/code)

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

app/services/ticket_pdf_generator.rb

@@ -32,13 +32,18 @@ class TicketPdfGenerator
       # Ticket info box
       pdf.stroke_color "E5E7EB"
       pdf.fill_color "F9FAFB"
-      pdf.rounded_rectangle [ 0, pdf.cursor ], 310, 120, 10
+      pdf.rounded_rectangle [ 0, pdf.cursor ], 310, 150, 10
       pdf.fill_and_stroke
 
       pdf.move_down 10
       pdf.fill_color "000000"
       pdf.font "Helvetica", size: 12
 
+      # Customer name
+      pdf.text "Ticket Holder:", style: :bold
+      pdf.text "#{ticket.first_name} #{ticket.last_name}"
+      pdf.move_down 8
+
       # Ticket details
       pdf.text "Ticket Type:", style: :bold
       pdf.text ticket.ticket_type.name
@@ -89,8 +94,8 @@ class TicketPdfGenerator
         raise "QR code data must be a valid string"
       end
 
-      qrcode = RQRCode::QRCode.new(qr_code_data)
-      pdf.print_qr_code(qrcode, extent: 120, align: :center)
+      # Generate QR code - prawn-qrcode expects the data string directly
+      pdf.print_qr_code(qr_code_data, extent: 120, align: :center)
 
       pdf.move_down 15