export interface Attachment { id: string; filename: string; mimeType: string; size: number; url: string; }
export interface AttachmentListResponse { items: Attachment[]; }
export declare function uploadAttachment(documentId: string, file: File): Promise<Attachment>;
export declare function listAttachments(documentId: string): Promise<AttachmentListResponse>;
export declare function isImageFile(file: File): boolean;
export declare function isFileSizeAllowed(file: File): boolean;