Devtools show null instead of NaN

Describe the bug

I set the field to Number.NaN but in devtools I see null.

I set all number fields to NaN in tanstack form but I convert it to empty string when actually setting <input value={...} inside of my field.MyInput because that's what the "not set" value for all inputs is supposed to be in HTML for whatever reason, even for type="number".

Your minimal, reproducible example

too busy

Steps to reproduce

set some number to nan in default values and observe devtools

Expected behavior

value: NaN

actual: null (not even the value: part. Also for groups it'll show value: {null,null, "someStringField": "", null}

How often does this bug happen?

Every time

Screenshots or Videos

Platform

mac, chrome

TanStack Form adapter

react-form

TanStack Form version

1.23.0

TypeScript version

5.9.2

Additional context

No response

Start by reproducing the issue with Number.NaN in default values for the React form adapter, then inspect how the devtools output represents scalar and grouped values. Done means NaN is shown as value: NaN rather than null, including inside groups.