Update react monorepo to v19

Author: renovate[bot]

package.json

@@ -17,8 +17,8 @@
     "@radix-ui/react-scroll-area": "^1.0.4",
     "@radix-ui/react-slot": "^1.0.2",
     "@t3-oss/env-nextjs": "^0.12.0",
-    "@types/react": "18.3.6",
-    "@types/react-dom": "18.3.0",
+    "@types/react": "19.0.12",
+    "@types/react-dom": "19.0.4",
     "@types/react-syntax-highlighter": "^15.5.7",
     "ai": "^4.0.0",
     "autoprefixer": "10.4.21",
@@ -35,8 +35,8 @@
     "next-themes": "^0.4.0",
     "postcss": "8.5.3",
     "prisma": "^5.2.0",
-    "react": "18.3.1",
-    "react-dom": "18.3.1",
+    "react": "19.0.0",
+    "react-dom": "19.0.0",
     "react-markdown": "^9.0.0",
     "react-syntax-highlighter": "^15.5.0",
     "rehype-sanitize": "^6.0.0",