Ensure refs are forwarded when freezing data

[thecrypticace]

We were wrapping rendered children in <Frozen> in a combobox however the refs weren't being forwarded through the internal <Frozen> component resulting in issues when rendering <ComboboxOptions> as a Fragment.

After this PR the following code no longer warns about function components not accepting refs.

import { Combobox, ComboboxInput, ComboboxOption, ComboboxOptions } from '@headlessui/react'
import React from 'react'

export default function Example() {
  return (
    <div className="p-4">
      <Combobox>
        <ComboboxInput className="rounded border border-neutral-400 p-2" />
        <ComboboxOptions as={React.Fragment}>
          <div className="bg-orange-500 p-4">
            <ComboboxOption value="a">A</ComboboxOption>
          </div>
        </ComboboxOptions>
      </Combobox>
    </div>
  )
}

Fixes #3384

[vercel]

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Project	Deployment	Preview	Comments	Updated (UTC)
headlessui-react	Ready	Preview	Comment	Sep 25, 2025 1:20pm
headlessui-vue	Ready	Preview	Comment	Sep 25, 2025 1:20pm

[augustl]

So, really sorry to be "that guy" (tbh, Github needs a "donate money here before you pester the open source maintainers" button), but is there anything I can help out with in order to get this one merged? :)