chore(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 19.3.0
- [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/v19.3.0/packages/react-dom)

Updates `@types/react-dom` from 19.2.3 to 19.3.0
- [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: 19.3.0
  dependency-type: direct:production
  update-type: version-update:semver-minor
- dependency-name: "@types/react-dom"
  dependency-version: 19.3.0
  dependency-type: direct:development
  update-type: version-update:semver-minor
...

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

frontend/package.json

@@ -32,7 +32,7 @@
     "next": "^16.2.7",
     "qrcode": "^1.5.4",
     "react": "^19.2.7",
-    "react-dom": "^19.2.7",
+    "react-dom": "^19.3.0",
     "react-map-gl": "^8.1.0",
     "satellite.js": "^6.0.2",
     "zod": "^4.3.6"