Ajouter SSR prerending, espace employe, formulaire inscription employee depuis admin

frontend/package.json

@@ -5,7 +5,8 @@
   "type": "module",
   "scripts": {
     "dev": "vite",
-    "build": "vite build",
+    "build": "vite build && node scripts/prerender.js",
+    "prerender": "node scripts/prerender.js",
     "lint": "eslint .",
     "preview": "vite preview",
     "test": "vitest run",
@@ -30,6 +31,7 @@
     "eslint-plugin-react-refresh": "^0.5.2",
     "globals": "^17.6.0",
     "jsdom": "^29.1.1",
+    "playwright": "^1.62.1",
     "tailwindcss": "^4.3.0",
     "vite": "^8.0.12",
     "vitest": "^4.1.10"