export declare const GRID_COLS = 4;
export declare const GRID_ROWS = 6;
export declare const TOTAL_CELLS: number;
export interface CellBounds {
    x0: number;
    y0: number;
    x1: number;
    y1: number;
}
/**
 * Calculate the pixel bounds for a grid cell (1-24).
 * Grid is 4 columns x 6 rows, numbered left-to-right, top-to-bottom.
 */
export declare function calculateGridCellBounds(cell: number, screenWidth: number, screenHeight: number): CellBounds;
/**
 * Calculate tap coordinates for a position within a cell.
 * Position: 1=TL, 2=TR, 3=Center, 4=BL, 5=BR
 */
export declare function calculatePositionCoordinates(position: 1 | 2 | 3 | 4 | 5, cellBounds: CellBounds): {
    x: number;
    y: number;
};
export declare const POSITION_LABELS: string[];
/**
 * Create a 4x6 numbered grid overlay on a screenshot.
 * Returns base64 JPEG (compressed for context efficiency).
 */
export declare function createGridOverlay(imagePath: string): Promise<string>;