design: 设计系统定稿——孟菲斯×拟物卡：四支柱 + ai-era-tutorial 概念到组件的映射

design-refs/mockup/build.sh

@@ -17,7 +17,7 @@ export TMPDIR="$HOME/.cache/h2p-tmp"
 
 STEMS=("$@")
 if [ ${#STEMS[@]} -eq 0 ]; then
-  STEMS=(course-shelf components color-system design-styles)
+  STEMS=(course-shelf components color-system design-styles design-system)
 fi
 
 for STEM in "${STEMS[@]}"; do