- Arch script records the build date as 8 digits (YYYYMMDD) in the image
description
- lx.ImageAliasesWithDesc exposes image descriptions; Images() folds the
date into the Arch intro ('…滚动发行版,我们提供镜像打包于 <date>')
- Arch icon is now the 'A without crossbar' (Λ) shape instead of a solid
triangle