verify(keyboard): 确认集合弹窗从最后一格附近打开 / Verify collection popup opens near the last cell

中文：
- 验证对象：try 提交 2afda48
- 验证步骤：通过方向键导航越过桌面集合的内联容量并打开弹窗
- 验证结果：弹窗在最后一格附近打开，用户确认没有问题

English:
- Verified commit: try commit 2afda48
- Steps: Use arrow-key navigation to move beyond the desktop collection inline capacity and open the popup
- Result: The popup opens near the last cell; the user confirmed the behavior is correct

验证 / Validation:
- 用户实际桌面键盘交互验证通过 / User-confirmed real desktop keyboard interaction passed

Author: FreeFallingSnow