Sanity TypeGen with NextJS: the return type of queries is not correctly resolved

[lucafaggianelli]

Describe the bug

When generating types definition via Sanity TypeGen in a NextJS project, the return type of queries is not correctly resolved.

Observing the generated types, they're all correct, but the @sanity/client import is not found (it's used in the declare module), the solution is either to install @sanity/client or use next-sanity in declare module.

To Reproduce

Steps to reproduce the behavior:

1. Generate a new NextJS + Sanity project
2. Follow the instruction to setup TypeGen
3. Create a query
4. The return type of the query is any

Expected behavior

The query return type should be defined and not any

Screenshots

Which versions of Sanity are you using?

@sanity/cli (global)  3.72.1 (up to date)
@sanity/image-url      1.1.0 (up to date)
@sanity/vision        3.72.1 (up to date)
sanity                3.72.1 (up to date)

What operating system are you using?

MacOS

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

pnpm v9.9.0
v22.10.0

Additional context

Add any other context about the problem here.

Security issue?

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