declare module 'mammoth/mammoth.browser' {
  export interface ConversionMessage {
    type: 'warning' | 'error';
    message: string;
  }
  export interface ConversionResult {
    value: string;
    messages: ConversionMessage[];
  }
  export function convertToHtml(input: { arrayBuffer: ArrayBuffer }): Promise<ConversionResult>;
}