type ITabName = 'management' | 'all'
type IFileConfig = {
  [p in ITabName]: {
    label: string,
    name: string,
    description: string,
    tab: ITabName,
    page: any
  }
}
interface IFileConfig {
    [p in ITabName]: {
    label: string,
    name: string,
    description: string,
    tab: ITabName,
    page: any
  }
}

为什么type声明IFileConfig没问题，而interface不行呢

答案很简单： interface 不支持