Describe the bug

I'm using GraphQL codegen for typing. Here is an MWE (I also made a repo to show the issue -- see the reproduction link):

const AllFilmsQuery = graphql(/* GraphQL */ `
  query AllFilmsWithVariablesQuery($first: Int!) {
    allFilms(first: $first) {
      edges {
        node {
          id
        }
      }
    }
  }
`)

// These variables should raise a type error:
useQuery({
  query: AllFilmsQuery,
  variables: { first: null } // wrong type
})
useQuery({
  query: AllFilmsQuery,
  variables: {  } // missing field
})
useQuery({
  query: AllFilmsQuery,
  variables: { foo: 'bar' } // extra field
})

The problem comes from this commit. If you revert

type MaybeRefObj<T> = T extends {} ? {
    [K in keyof T]: MaybeRef<T[K]>;
} : T;

to

type MaybeRefObj<T extends {}> = { [K in keyof T]: MaybeRef<T[K]> };

then the type of the variables is correctly inferred, and the above examples produce a type error.

Not sure if one can revert the aforementioned commit without breaking something else... (I can investigate if need be.)

Reproduction

https://github.com/arkandias/urql-vue-variables-typing-issue

Urql version

"dependencies": {
"@urql/vue": "^1.4.2",
"graphql": "^16.10.0",
"vue": "^3.5.13"
},
"devDependencies": {
"@graphql-codegen/cli": "^5.0.3",
"@graphql-codegen/client-preset": "^4.5.1",
"@graphql-typed-document-node/core": "^3.2.0",
"@vitejs/plugin-vue": "^5.2.1",
"@vue/tsconfig": "^0.7.0",
"typescript": "~5.6.3",
"vite": "^6.0.5",
"vue-tsc": "^2.2.0"
}

Validations

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