Method unlinkNode

packages/core/src/document/document.ts:263–271

(node: Node)

  @action
  unlinkNode(node: Node) {
    // 追踪物料使用：减少使用计数
    if (node.componentName) {
      this.designer.materials.decrementUsage(node.materialUsageKey)
    }

    this.nodes.delete(node)
    this._nodesMap.delete(node.id)
  }

  migrateNode(node: Node, newParent: Node) {
    if (node.parent === newParent) {