fix: correct setvalue in equation input behavior

[wststone]

fix for #3851
I tried setting the caret position manually through reference of this fix, but it seems that input of foreign character (e.g. Chinese) through a virtual keyboard still has the same issue.
It seems that the original logic is just to reset the value to the previous when it closes on dismiss, so i used just store a value in ref on open and set it back on close

Checklist

• yarn typecheck
• yarn lint:fix
• yarn test
• yarn brl
• yarn changeset
• ui changelog

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🦋 Changeset detected

Latest commit: df35d66

The changes in this PR will be included in the next version bump.

This PR includes changesets to release 1 package

Name	Type
@udecode/plate-math	Patch

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Name	Status	Preview	Comments	Updated (UTC)
plate	✅ Ready (Inspect)	Visit Preview	💬 Add feedback	Dec 12, 2024 2:12pm

[felixfeng33]

Looks good thanks! we need a free version of the math plugin to facilitate testing I will add it later.
Can you add a changest?

[felixfeng33]

We fixes the #3851 but we got this error now when we undo in the input box it will still keep the previous value 2 but not in the element.

math.mp4

[wststone]

We fixes the #3851 but we got this error now when we undo in the input box it will still keep the previous value 2 but not in the element.

math.mp4

I will take a look