feat(app): implement Product Scan review flow, dynamic batch expiry picker, custom PDFs, PO relationships, and aligned card layouts

backend/pfm-web-app/package.json

@@ -28,6 +28,7 @@
     "@types/react-dom": "^19",
     "eslint": "^9",
     "eslint-config-next": "16.2.6",
+    "puppeteer": "^25.3.0",
     "tailwindcss": "^4",
     "typescript": "^5"
   }