fix(deps): update react monorepo to v19

Author: renovate[bot]

llm-ui/package.json

@@ -39,9 +39,9 @@
     "next": "^13.5.6",
     "next-themes": "^0.2.1",
     "openai": "^4.19.0",
-    "react": "^18.2.0",
+    "react": "^19.0.0",
     "react-children-utilities": "^2.9.0",
-    "react-dom": "^18.2.0",
+    "react-dom": "^19.0.0",
     "react-hot-toast": "^2.4.1",
     "react-intersection-observer": "^9.5.3",
     "react-markdown": "^9.0.1",
@@ -56,8 +56,8 @@
   "devDependencies": {
     "@tailwindcss/typography": "^0.5.10",
     "@types/node": "^20.9.1",
-    "@types/react": "^18.2.37",
-    "@types/react-dom": "^18.2.15",
+    "@types/react": "^19.0.0",
+    "@types/react-dom": "^19.0.0",
     "@types/react-syntax-highlighter": "^15.5.10",
     "@typescript-eslint/parser": "^6.0.0",
     "autoprefixer": "^10.4.16",