Add memo optimization

package.json

@@ -39,6 +39,7 @@
     "@mdx-js/loader": "^3.1.1",
     "@mdx-js/react": "^3.1.1",
     "@next/mdx": "^15.5.2",
+    "critters": "^0.0.23",
     "gray-matter": "^4.0.3",
     "next": "15.2.4",
     "react": "^19.0.0",