Completion does not work for generic type extending tuple or array of all partial type #63785

// All partial type works

type AllPartialObject = {
  component?: string
}

declare function extendTheme1<Extensions extends [AllPartialObject]>(
  extensions: Extensions
): void

extendTheme1([
  {
    /* Can autocomplete `component` here */
  },
])

// But all partial type with mapped types doesn't work

declare function extendTheme2<
  Extensions extends [AllPartialObject & Record<string, unknown>],
>(extensions: Extensions): void

extendTheme2([
  {
    /* Can't autocomplete `component` here */
  },
])

// with required field works

type PartialWithRequiredObject = {
  component?: string
  requiredField: string
}

declare function extendTheme3<
  Extensions extends [PartialWithRequiredObject & Record<string, unknown>],
>(extensions: Extensions): void

extendTheme3([
  {
    /* Can autocomplete `component` here */
  },
])

// but with required field and complete required field doesn't work

extendTheme3([
  {
    requiredField: 'foo',
    /* Can't autocomplete `component` here */
  },
])

// also BaseTheme with no mapped types doesn't work too

declare function extendTheme4<Extensions extends [PartialWithRequiredObject]>(
  extensions: Extensions
): Extensions

extendTheme4([
  {
    requiredField: 'foo',
    /* Can't autocomplete `component` here */
  },
])

// no extend tuple works

declare function extendTheme5<
  Extensions extends AllPartialObject & Record<string, unknown>,
>(extensions: [Extensions]): Extensions

extendTheme5([
  {
    /* Can autocomplete `component` here */
  },
])