fix(deps): update react monorepo to v19

Author: renovate[bot]

package.json

@@ -40,8 +40,8 @@
     "mini-css-extract-plugin": "2.9.2",
     "path-browserify": "1.0.1",
     "postcss-loader": "8.1.1",
-    "react": "18.3.1",
-    "react-dom": "18.3.1",
+    "react": "19.2.3",
+    "react-dom": "19.2.3",
     "react-flip-move": "3.0.5",
     "react-leaflet": "4.2.1",
     "react-markdown": "9.0.3",