## Description
- Add null checks before clearTimeout calls in colorful-fallback.tsx, edgeless.dialog.tsx, and local.dialog.tsx
- Fix event listener cleanup in unfolding.tsx
- Update tsconfig.jsx to use react-jsx transform
## Testing
- [x] Verified type safety improvements for React 19 compatibility
- [x] Ensured proper cleanup of event listeners and timeouts
- [x] Confirmed no unintended side effects from the changes
Link to Devin run: https://app.devin.ai/sessions/2e790f3ea0d84402837ec6c3c6f83e4c
- Fixed the issue that a certain feature must be enabled when creating a user
- Fixed the issue that the modified content was not reset to the default content when exiting the user form without saving after modification
- Fixed the issue that the content did not switch as expected when switching user forms of different users
https://github.com/user-attachments/assets/02567021-9342-4ed1-be77-3bdcbb3d86ab
