/** Escapes a CSV field: quotes as needed, guards against formula injection. */
export declare function escapeCsvField(value:unknown):string;export interface LyraCsvColumn{readonly key:string;readonly label:string;}export interface LyraBuildCsvOptions{
/** Prepends a UTF-8 byte-order mark (U+FEFF) ahead of the header row. Excel on Windows
*  ignores a downloaded file's MIME charset and decodes a BOM-less CSV with the system ANSI
*  code page, so accented, Arabic, CJK, and typographic characters render as mojibake; the BOM
*  makes Excel detect UTF-8 and decode correctly. Google Sheets, LibreOffice, and Numbers
*  already sniff UTF-8 correctly with or without it. Defaults to `false` (today's bytes,
*  unchanged). Never apply this to JSON -- RFC 8259 forbids a BOM there. */
readonly bom?:boolean;}
/** Builds a CRLF-joined CSV string with a header row, optionally prefixed with a UTF-8
*  byte-order mark (see `LyraBuildCsvOptions.bom`). */
export declare function buildCsv(rows:readonly Readonly<Record<string,unknown>>[],columns:readonly LyraCsvColumn[],options?:LyraBuildCsvOptions):string;
/** Triggers a browser download of `content` as `filename` in `ownerDocument`'s realm. */
export declare function downloadBlob(content:string,filename:string,mime:string,ownerDocument?:Document):void;