feat(events): Add Lightning Network ticket purchase flow with QR code generation

- Integrate QRCode library for Lightning payment QR code generation
- Create PurchaseTicketDialog component for ticket purchase workflow
- Implement dynamic ticket purchase API integration with error handling
- Add Lightning wallet payment QR code and deep linking support
- Update events page to trigger ticket purchase dialog
- Configure environment variables for ticket purchase API endpoint

package.json

@@ -10,6 +10,7 @@
     "analyze": "vite build --mode analyze"
   },
   "dependencies": {
+    "@types/qrcode": "^1.5.5",
     "@vueuse/components": "^12.5.0",
     "@vueuse/core": "^12.5.0",
     "@vueuse/head": "^2.0.0",
@@ -20,6 +21,7 @@
     "lucide-vue-next": "^0.474.0",
     "nostr-tools": "^2.10.4",
     "pinia": "^2.3.1",
+    "qrcode": "^1.5.4",
     "radix-vue": "^1.9.13",
     "reka-ui": "^2.0.2",
     "tailwind-merge": "^2.6.0",