chore(deps): bump react-dom and @types/react-dom in /frontend

Bumps [react-dom](https://github.com/facebook/react/tree/HEAD/packages/react-dom) and [@types/react-dom](https://github.com/DefinitelyTyped/DefinitelyTyped/tree/HEAD/types/react-dom). These dependencies needed to be updated together.

Updates `react-dom` from 18.3.1 to 19.2.3
- [Release notes](https://github.com/facebook/react/releases)
- [Changelog](https://github.com/facebook/react/blob/main/CHANGELOG.md)
- [Commits](https://github.com/facebook/react/commits/v19.2.3/packages/react-dom)

Updates `@types/react-dom` from 18.3.7 to 19.2.3
- [Release notes](https://github.com/DefinitelyTyped/DefinitelyTyped/releases)
- [Commits](https://github.com/DefinitelyTyped/DefinitelyTyped/commits/HEAD/types/react-dom)

---
updated-dependencies:
- dependency-name: react-dom
  dependency-version: 19.2.3
  dependency-type: direct:production
  update-type: version-update:semver-major
- dependency-name: "@types/react-dom"
  dependency-version: 19.2.3
  dependency-type: direct:development
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

frontend/package-lock.json

@@ -26,7 +26,7 @@
     "lucide-react": "^0.554.0",
     "next-themes": "^0.4.6",
     "react": "^18.2.0",
-    "react-dom": "^18.2.0",
+    "react-dom": "^19.2.3",
     "react-router-dom": "^7.12.0",
     "react-syntax-highlighter": "^16.1.0",
     "reactflow": "^11.11.4",
@@ -36,7 +36,7 @@
   },
   "devDependencies": {
     "@types/react": "^18.2.43",
-    "@types/react-dom": "^18.2.17",
+    "@types/react-dom": "^19.2.3",
     "@vitejs/plugin-react": "^4.7.0",
     "autoprefixer": "^10.4.16",
     "postcss": "^8.4.32",