T46 E2E: Playwright walks the built site, desktop and phone, live stories included

frontend/package.json

@@ -7,9 +7,11 @@
     "dev": "vite",
     "build": "tsc --noEmit && vite build",
     "preview": "vite preview",
-    "deploy": "wrangler deploy"
+    "deploy": "wrangler deploy",
+    "e2e": "playwright test"
   },
   "devDependencies": {
+    "@playwright/test": "1.63.0",
     "@types/three": "0.186.0",
     "typescript": "^7.0.2",
     "vite": "8.3.1",