import { UserDocumentRecord } from '../workspace/types.js';
import { FileBrowserEntry } from './file-browser-types.js';
export declare function formatFileBytes(bytes: number | null | undefined): string;
export declare function formatFileDate(value: string | Date | null | undefined): string;
export declare function joinPrefix(prefix: string, segment: string): string;
/** Join a folder prefix with a file name (no trailing slash). */
export declare function joinStoragePath(prefix: string, name: string): string;
export declare function parentPrefix(prefix: string): string;
export declare function prefixCrumbs(prefix: string): {
    label: string;
    prefix: string;
}[];
export declare function storageBreadcrumbItems(prefix: string): {
    label: string;
    prefix: string;
}[];
export declare function sortBrowserEntries(entries: readonly FileBrowserEntry[]): FileBrowserEntry[];
/**
 * Map Athena managed-storage documents into browser entries.
 * Keys under the current prefix that contain an extra `/` are folded into
 * synthetic folder rows so the list can navigate by common-prefix.
 */
export declare function documentsToFileBrowserEntries(documents: readonly UserDocumentRecord[], prefix?: string): FileBrowserEntry[];
/** Offline / first-paint demo tree used by example apps. */
export declare function createMockFileTree(prefix?: string): FileBrowserEntry[];