Update react dependencies

app/package.json

@@ -35,6 +35,7 @@
     "@codemirror/state": "^6.5.2",
     "@codemirror/theme-one-dark": "^6.1.3",
     "@codemirror/view": "^6.38.6",
+    "@floating-ui/react": "^0.27.16",
     "@mantine/core": "^8.3.7",
     "@mantine/hooks": "^8.3.7",
     "@mantine/modals": "^8.3.7",
@@ -44,7 +45,7 @@
     "codemirror": "^6.0.2",
     "react": "^19.2.0",
     "react-arborist": "^3.4.3",
-    "react-dom": "^18.3.1",
+    "react-dom": "^19.2.0",
     "rehype-highlight": "^7.0.2",
     "rehype-mathjax": "^7.1.0",
     "rehype-react": "^8.0.0",