chore(deps): bump react-dom from 19.2.3 to 19.2.7 in /app/frontend

Bumps [react-dom](https://github.com/facebook/react/tree/HEAD/packages/react-dom) from 19.2.3 to 19.2.7.
- [Release notes](https://github.com/facebook/react/releases)
- [Changelog](https://github.com/react/react/blob/main/CHANGELOG.md)
- [Commits](https://github.com/facebook/react/commits/v19.2.7/packages/react-dom)

---
updated-dependencies:
- dependency-name: react-dom
  dependency-version: 19.2.7
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

Author: dependabot[bot]

app/frontend/package.json

@@ -29,7 +29,7 @@
     "next-themes": "^0.4.6",
     "papaparse": "^5.5.3",
     "react": "19.2.3",
-    "react-dom": "19.2.3",
+    "react-dom": "19.2.7",
     "react-leaflet": "^5.0.0",
     "tailwind-merge": "^3.6.0",
     "zustand": "^5.0.10"