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

Bumps [react-dom](https://github.com/react/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 19.2.7 to 19.2.8
- [Release notes](https://github.com/react/react/releases)
- [Changelog](https://github.com/react/react/blob/main/CHANGELOG.md)
- [Commits](https://github.com/react/react/commits/v19.2.8/packages/react-dom)

Updates `@types/react-dom` from 19.2.3 to 19.2.4
- [Release notes](https://github.com/DefinitelyTyped/DefinitelyTyped/releases)
- [Commits](https://github.com/DefinitelyTyped/DefinitelyTyped/commits/HEAD/types/react-dom)

---
updated-dependencies:
- dependency-name: "@types/react-dom"
  dependency-version: 19.2.4
  dependency-type: direct:development
  update-type: version-update:semver-patch
- dependency-name: react-dom
  dependency-version: 19.2.8
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

Author: dependabot[bot]

frontend/package.json

@@ -54,7 +54,7 @@
     "next-themes": "^0.4.6",
     "react": "^19.2.8",
     "react-day-picker": "^10.0.1",
-    "react-dom": "^19.2.7",
+    "react-dom": "^19.2.8",
     "react-hook-form": "^7.77.0",
     "react-hot-toast": "^2.5.0",
     "react-markdown": "^10.1.0",