🐛 Prevent Event Propagation to Other Widgets

[MFA-X-AI]

Description

This PR adds event handling logic to fully stop keyboard event propagation (preventDefault(), stopPropagation(), stopImmediatePropagation()) in CustomActionEvent. This ensures key commands like Ctrl+Z only affect the active xircuits canvas and do not interfere with other JupyterLab widgets like text editors when they are not active.

References

#254

Pull Request Type

• Xircuits Core (Jupyterlab Related changes)
• Xircuits Canvas (Custom RD Related changes)
• Xircuits Component Library
• Xircuits Project Template
• Testing Automation
• Documentation
• Others (Please Specify)

Type of Change

• New feature (non-breaking change which adds functionality)
• Bug fix (non-breaking change which fixes an issue)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• This change requires a documentation update

Tests

1. Verify that Ctrl+Z, Ctrl+Y, etc., only impact the active Xircuits canvas.
2. Confirm that no other JupyterLab widgets, such as the text editor, are affected by key commands while the Xircuits widget is focused.

Tested on?

• Windows
• Linux Ubuntu
• Centos
• Mac
• Others (State here -> xxx )

[github-actions]

👈 Launch a binder notebook on branch XpressAI/xircuits/fahreza/propagation-bugfix