Bump @types/node from 24.13.4 to 26.4.1 in /frontend

Bumps [@types/node](https://github.com/DefinitelyTyped/DefinitelyTyped/tree/HEAD/types/node) from 24.13.4 to 26.4.1.
- [Release notes](https://github.com/DefinitelyTyped/DefinitelyTyped/releases)
- [Commits](https://github.com/DefinitelyTyped/DefinitelyTyped/commits/HEAD/types/node)

---
updated-dependencies:
- dependency-name: "@types/node"
  dependency-version: 26.4.1
  dependency-type: direct:development
  update-type: version-update:semver-major
...

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Author: dependabot[bot]