修复showLayer和hideLayer功能

sbjw

2025-08-28 abbf6c96a71f9ba9ab853a3adceac41b79cb7695

 public/example/ExampleDrawPage.md

@@ -4,7 +4,7 @@
```jsx
import React, {Component} from 'react'
import './ExampleDrawPage.css'
import {GIS} from "../iclient3d-plot-diy";
import {GIS} from "iclient3d-plot-diy";

;
import {Button} from "antd";