Function cursorMove

src/ink/termio/csi.ts:169–184

(x: number, y: number)

 * Positive y = down, negative y = up
 */
export function cursorMove(x: number, y: number): string {
  let result = ''
  // Horizontal first (matches ansi-escapes behavior)
  if (x < 0) {
    result += cursorBack(-x)
  } else if (x > 0) {
    result += cursorForward(x)
  }
  // Then vertical
  if (y < 0) {
    result += cursorUp(-y)
  } else if (y > 0) {
    result += cursorDown(y)
  }
  return result
}

// Save/restore cursor position