LEARNING MAP
知识不是清单，而是一张可以穿行的地图。
拖拽和缩放查看学习路径；点击节点前往对应的 Garden 笔记。
Press enter or space to select a node. You can then use the arrow keys to move the node around. Press delete to remove it and escape to cancel.
Press enter or space to select an edge. You can then press delete to remove it or escape to cancel.