Bump react-dom from 18.3.1 to 19.0.0 in /app/assets

Bumps [react-dom](https://github.com/facebook/react/tree/HEAD/packages/react-dom) from 18.3.1 to 19.0.0.
- [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/v19.0.0/packages/react-dom)

---
updated-dependencies:
- dependency-name: react-dom
  dependency-type: direct:development
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <[email protected]>