Bump React and TypeScript types

app/package.json

@@ -42,7 +42,7 @@
     "@react-hook/resize-observer": "^2.0.2",
     "@tabler/icons-react": "^3.35.0",
     "codemirror": "^6.0.2",
-    "react": "^18.3.1",
+    "react": "^19.2.0",
     "react-arborist": "^3.4.3",
     "react-dom": "^18.3.1",
     "rehype-highlight": "^7.0.2",
@@ -61,8 +61,8 @@
     "@testing-library/react": "^16.3.0",
     "@types/babel__core": "^7.20.5",
     "@types/node": "^24.10.1",
-    "@types/react": "^18.3.20",
-    "@types/react-dom": "^18.3.6",
+    "@types/react": "^19.2.5",
+    "@types/react-dom": "^19.2.3",
     "@typescript-eslint/eslint-plugin": "^8.46.4",
     "@typescript-eslint/parser": "^8.32.1",
     "@vitejs/plugin-react": "^5.1.1",