Add PDF ticket generation and download feature

Introduces PDF ticket generation using html2canvas and jsPDF, including a new PdfTicketComponent for ticket rendering and a PdfService for PDF creation. Updates purchase success flow to allow users to download tickets as PDFs, adds progress feedback, and includes a test route and component for development. Also refactors order form with a fake fill helper and improves UI details.

package.json

@@ -34,6 +34,8 @@
     "@tailwindcss/postcss": "^4.1.14",
     "angularx-qrcode": "^20.0.0",
     "canvas-confetti": "^1.9.4",
+    "html2canvas": "^1.4.1",
+    "jspdf": "^3.0.4",
     "ngx-mask": "^20.0.3",
     "postcss": "^8.5.6",
     "rxjs": "~7.8.0",
@@ -45,6 +47,7 @@
     "@angular/build": "^20.3.5",
     "@angular/cli": "^20.3.5",
     "@angular/compiler-cli": "^20.3.0",
+    "@types/html2canvas": "^0.5.35",
     "@types/jasmine": "~5.1.0",
     "jasmine-core": "~5.9.0",
     "karma": "~6.4.0",