Spreading array into array creates wrong TS type

[heggemsnes]

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Describe the bug

Doing a projection like this:

"categories": array::compact([
        ...relatedProducts[]->{
            _id,
            "title": coalesce(title, name),
        },
        ...relatedIndustries[]->{
            _id,
            "title": coalesce(title, page.title),
        },
        ...relatedApplicationUseCases[]->{
            _id,
            "title": coalesce(title),
        }
    ]),

Causes the type generated type to be:

({
    _id: string;
    title: string;
}[] | {
    _id: string;
    title: string | null;
}[])[]

Whereas the data is correct with the objects in the top array:

categories: [
  { _id: '31827a4f-1b1a-4eed-90e6-a1475bfd9250', title: 'MRU Marine' },
  {
    _id: 'be1d8610-2df5-4867-8cfb-3651f8d21660',
    title: 'MRUs for Shipping'
  },
  { _id: 'fce3bc20-41ca-4c1e-8a83-0c48499f3515', title: 'Wind energy' }
]

To Reproduce

Steps to reproduce the behavior:

Query something with an array field and spread the array into a constructed array in groq.

Expected behavior

Type looks the same as data when spreading arrays.

Which versions of Sanity are you using?

@sanity/cli (global) 3.70.0 (latest: 3.71.2)
@sanity/icons 3.5.7 (up to date)
@sanity/image-url 1.1.0 (up to date)
@sanity/orderable-document-list 1.2.2 (up to date)
@sanity/preview-url-secret 2.1.0 (latest: 2.1.3)
@sanity/ui 2.11.1 (latest: 2.11.6)
@sanity/vision 3.69.0 (latest: 3.71.2)
@sanity/visual-editing 2.12.0 (latest: 2.12.9)
sanity 3.70.0 (latest: 3.71.2)

What operating system are you using?

MacOS 14.3.1

Which versions of Node.js / npm are you running?

v20.11.0, pnpm 9.6.0

Run npm -v && node -v in the terminal and copy-paste the result here.