export interface BuildReport {
    /** Parts of the original that were carried over untouched. */
    preserved: string[];
    /** Body-level details that could not be represented in the editor. */
    dropped: string[];
    /** Diagnostics for the bridge log. */
    notes: string[];
}
export interface BuildResult {
    bytes: Buffer;
    report: BuildReport;
}
/**
 * Merge the edited HTML body into the original package.
 *
 * Throws on any structural problem - the caller fails the job and keeps the
 * draft rather than writing a degraded file.
 */
export declare function buildDocxFromTemplate(original: Buffer, html: string): Promise<BuildResult>;