chore(main): fix ai findings

[ArtieReus]

Summary

Addressed multiple code quality and maintainability issues identified by GitHub AI code scanning, including accessibility fixes,
deprecated imports, type safety improvements, and error handling.

Changes

• Accessibility: Corrected spelling of arial-label to aria-label in test description
• Testing Library: Replaced deprecated act import from React with the recommended import from @testing-library/react
  (React 18+ best practice)
• Error Handling: Added type guard to check if error is an Error instance before accessing message property, preventing
  potential undefined display to users
• Type Safety:
  • Replaced any type with proper TypeScript types, defining Props interface with React.ReactNode for children
  • Improved YamlViewerProps to properly type-check spread props by extending base props type

Related Issues

• https://github.com/cloudoperators/juno/security/quality/ai-findings

Screenshots (if applicable)

Testing Instructions

1. pnpm i
2. pnpm TASK

Checklist

• I have performed a self-review of my code.
• I have commented my code, particularly in hard-to-understand areas.
• I have added tests that prove my fix is effective or that my feature works.
• New and existing unit tests pass locally with my changes.
• I have made corresponding changes to the documentation (if applicable).
• My changes generate no new warnings or errors.
• I have created a changeset for my changes.

PR Manifesto

Review the PR Manifesto for best practises.

[changeset-bot]

🦋 Changeset detected

Latest commit: 05ba88c

The changes in this PR will be included in the next version bump.

This PR includes changesets to release 1 package

Name	Type
@cloudoperators/juno-app-greenhouse	Patch

Not sure what this means? Click here to learn what changesets are.

Click here if you're a maintainer who wants to add another changeset to this PR

[github-actions]

PR Preview Action v1.8.1
Preview removed because the pull request was closed.
2026-02-27 15:35 UTC