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 18.2.0 to 19.2.6
- [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/v19.2.6/packages/react-dom)

Updates `@types/react-dom` from 18.3.6 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: "@types/react-dom"
  dependency-version: 19.2.3
  dependency-type: direct:development
  update-type: version-update:semver-major
- dependency-name: react-dom
  dependency-version: 19.2.4
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

Author: dependabot[bot]

frontend/package.json

@@ -47,7 +47,7 @@
     "pdfjs-dist": "5.3.93",
     "react": "18.2.0",
     "react-d3-tree": "^3.6.6",
-    "react-dom": "18.2.0",
+    "react-dom": "19.2.6",
     "react-hook-form": "^7.54.1",
     "react-i18next": "^15.5.3",
     "react-markdown": "^8.0.7",
@@ -71,7 +71,7 @@
     "@types/js-yaml": "^4.0.9",
     "@types/node": "22.15.16",
     "@types/react": "18.3.20",
-    "@types/react-dom": "18.3.6",
+    "@types/react-dom": "19.2.3",
     "@types/papaparse": "^5.3.16",
     "eslint": "^9.34.0",
     "eslint-config-next": "15.5.7",