Method pixelToCell

lib/selection-manager.ts:755–766

* Convert pixel coordinates to terminal cell coordinates

(x: number, y: number)

   * Convert pixel coordinates to terminal cell coordinates
   */
  private pixelToCell(x: number, y: number): { col: number; row: number } {
    const metrics = this.renderer.getMetrics();

    const col = Math.floor(x / metrics.width);
    const row = Math.floor(y / metrics.height);

    // Clamp to terminal bounds
    return {
      col: Math.max(0, Math.min(col, this.terminal.cols - 1)),
      row: Math.max(0, Math.min(row, this.terminal.rows - 1)),
    };
  }

  /**
   * Normalize selection coordinates (handle backward selection)