feat: 新增撤回前进功能

src/packages/utils/publicConfig.ts

@@ -1,15 +1,15 @@
 import { getUUID } from '@/utils'
 import { PublicConfigType } from '@/packages/index.d'
 
-export class publicConfig implements PublicConfigType{
+export class publicConfig implements PublicConfigType {
   public id = getUUID()
   // 重命名
   public rename = undefined
   // 基本信息
-  public attr = { x: 0, y: 0, w: 500, h: 300, zIndex: 0 }
+  public attr = { x: 0, y: 0, w: 500, h: 300, zIndex: -1 }
   // 设置坐标
   public setPosition(x: number, y: number): void {
     this.attr.x = x
     this.attr.y = y
   }
-}
+}