Version history demo broken

[Izhaki]

Description

The version history demo is broken:

• You can only enters chars, you cannot move with the arrow keys or press delete.
• Doesn't show any diff
• Page often crashs

Reproduction URL

https://platejs.org/docs/examples/version-history

Reproduction steps

Edit the text, save revision.

Plate version

Web

Slate React version

Web

Screenshots

platejs-diff-bug.mp4

Logs

Browsers

Chrome

[zbeyens]

Codex reproduced and fixed this issue.

PR: #4906.

Reproduced the broken edit/save flow, fixed the shared-snapshot bug in the version history demo, and re-verified the affected browser flow locally.

Remaining caveat: none.