/**
 * Excel address utilities — subset copied from client/shared for use without
 * pulling in the full client/shared dependency.
 */
/** Convert 0-based column index to Excel-style column letters (0 -> "A", 26 -> "AA"). */
export declare function getColumnLetter(index: number): string;
/** Parse "A1" or "Sheet1!A1" into 0-based row/col + optional sheetName. */
export declare function parseExcelAddress(address: string): {
    row: number;
    col: number;
    sheetName?: string;
};
/** Convert 0-based row/col to A1 notation. */
export declare function indexToAddress(row: number, col: number): string;
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