export declare function timestampedFilename(prefix: string, ext?: string): string;
export declare function timestampedFilenamePdf(prefix: string, ext?: string): string;
export declare function ensureDirectoryExists(dirPath: string): Promise<void>;
export declare function cleanVesselName(vesselName: string): string;
export declare function formatDate(dateStr: string): string;
export declare function generatePdfFilename(vesselName: string, imo: string, inspectionDate: string): string;