elementPlus tree全部展開/折疊
展開 Object.values(treeRef.value.store.nodesMap).forEach((v) => v.expand())
折疊 Object.values(treeRef.value.store.nodesMap).forEach((v) => v.collapse())
展開 Object.values(treeRef.value.store.nodesMap).forEach((v) => v.expand())
折疊 Object.values(treeRef.value.store.nodesMap).forEach((v) => v.collapse())