Function didShrink

src/cli/viewport.ts:58–63

(
  prev: { cols: number; rows: number },
  next: { cols: number; rows: number },
)

 * history as a duplicate. We detect a shrink so the UI can clear + repaint cleanly.
 */
export function didShrink(
  prev: { cols: number; rows: number },
  next: { cols: number; rows: number },
): boolean {
  return next.cols < prev.cols || next.rows < prev.rows;
}

/** ANSI: clear the entire screen AND the scrollback, home the cursor. Used on a
 *  shrink so the reflowed/duplicated frame is wiped before Ink repaints. */