export interface CapturedImage {
    /** Base64-encoded image data (no data: URL prefix). */
    data: string;
    mimeType: string;
}
/** Terminals don't deliver image bytes through paste, so we read the macOS
 *  pasteboard directly via osascript. Null when the clipboard holds no image. */
export declare function readClipboardImage(): Promise<CapturedImage | null>;