Add Symfony payload mapping, fixtures, and QA tooling

client/package.json

@@ -10,8 +10,12 @@
     "preview": "vite preview"
   },
   "dependencies": {
+    "@radix-ui/react-slot": "^1.2.3",
+    "class-variance-authority": "^0.7.1",
+    "clsx": "^2.1.1",
     "react": "^19.1.1",
-    "react-dom": "^19.1.1"
+    "react-dom": "^19.1.1",
+    "tailwind-merge": "^3.3.1"
   },
   "devDependencies": {
     "@eslint/js": "^9.36.0",
@@ -19,11 +23,15 @@
     "@types/react": "^19.1.16",
     "@types/react-dom": "^19.1.9",
     "@vitejs/plugin-react": "^5.0.4",
+    "autoprefixer": "^10.4.21",
     "babel-plugin-react-compiler": "^19.1.0-rc.3",
     "eslint": "^9.36.0",
     "eslint-plugin-react-hooks": "^5.2.0",
     "eslint-plugin-react-refresh": "^0.4.22",
     "globals": "^16.4.0",
+    "postcss": "^8.5.6",
+    "tailwindcss": "^3.4.17",
+    "tailwindcss-animate": "^1.0.7",
     "typescript": "~5.9.3",
     "typescript-eslint": "^8.45.0",
     "vite": "npm:rolldown-vite@7.1.14"