[EPIC](React 19): Phase 2 - Preparation for React 19

[barsukov]

Epic: Phase 2 - Preparation for React 19

Description

Ensure Juno is fully compatible with React 19 before upgrading.

Objectives

• Run official React 19 codemods.
• Update TypeScript and third-party dependencies.
• Ensure test setups are compatible.

Acceptance Criteria

• Codemods applied and manual fixes completed.
• TypeScript and dependencies updated.
• All tests pass.

Tasks

• Run npx @react/codemod react-19 on all packages and apps.
• Upgrade TypeScript to the latest version across:
  • @cloudoperators/juno-ui-components
  • @cloudoperators/juno-greenhouse
  • @cloudoperators/juno-messages-provider
  • @cloudoperators/juno-app-greenhouse
  • @cloudoperators/juno-app-doop
  • @cloudoperators/juno-app-heureka
  • @cloudoperators/juno-app-supernova
  • @cloudoperators/juno-app-template
  • @cloudoperators/juno-app-example
  • @cloudoperators/juno-app-carbon
• Check and update third-party dependencies in all packages and apps.
• Update and verify test setups.

Dependencies

• Phase 1 - React 18.3 Upgrade must be complete.

Additional Notes

This phase mitigates risks before upgrading to React 19.

---