Adds check to the "Imported from" link to verify source nodes exist before attempting a navigation

[akolson]

Summary

This pr improves the user experience when a user clicks the "Imported from" link whose source content no longer exists (or has been deleted). A check is performed to ascertain that the source node still exists before attempting to perform navigation.

Screen.Recording.2024-11-28.at.21.20.37.mov

⚠ i18n ⚠
Please note that this pr introduces a new string that will require translation before deployment to production. Adding @radinamatic as reviewer to keep track.

References

Fixes #4828

Reviewer guidance

⚠ DO NOT do this in Production ⚠

1. Import content from another channel
2. Delete the source content node
3. Click the 'Import from' link on the copy

[bjester]

Thank you for addressing this. Unfortunately, this doesn't quite achieve the desired result yet. I believe it's because the link still has the href, and so the click handler does not prevent the navigation.

[akolson]

Hi @bjester! 👀 Completely skipped cleaning up the href references (I guess during the retargeting). We should be good now. Thanks for pointing this out.

[bjester]

LGTM and works! Thanks @akolson