[修正] 默认选中

src/app/working-area/working-area.component.ts

@@ -1745,6 +1745,7 @@ export class WorkingAreaComponent extends EventEmitter implements OnInit, AfterV
     this.backgroundImage.addChild(this.previewLineSegment);
 
     this.backgroundImage.addChild(this.rectToolGraphics);
+    this.rectToolGraphics.visible = false;
   }
   /**
    * 刷新预览线段