fix: /demos/[vertical] route with Next.js 15 params await

- Fix Next.js 15 params requirement (await params)
- Add minimal test for route redirect behavior
- Test verifies all 4 verticals redirect correctly

package.json

@@ -6,20 +6,25 @@
   "scripts": {
     "dev": "next dev -p 1284",
     "build": "next build",
-    "start": "next start"
+    "start": "next start",
+    "test": "node --experimental-strip-types tests/demos-vertical.test.ts"
   },
   "dependencies": {
     "@google/genai": "^1.39.0",
     "@google/generative-ai": "^0.24.1",
+    "@stripe/stripe-js": "^8.7.0",
+    "@vapi-ai/web": "^2.5.2",
     "framer-motion": "^12.23.12",
     "next": "^15.5.3",
     "react": "^19.1.1",
-    "react-dom": "^19.1.1"
+    "react-dom": "^19.1.1",
+    "stripe": "^17.5.0"
   },
   "devDependencies": {
     "@types/react": "^19.1.12",
     "@types/react-dom": "^19.1.9",
     "autoprefixer": "^10.4.21",
+    "dotenv": "^17.3.1",
     "postcss": "^8.5.6",
     "tailwindcss": "^3.4.17",
     "typescript": "^5.9.2"