🐛 [BUG]水波图官方示例不显示数值和水波

水波图官方示例不显示数值和水波。

* **G2Plot Version**:
'''
{
"dependencies": {
"@antv/g2plot": "latest"
},
"main": "index.js"
}
'''

在官方示例中能显示，但在codesandbox和 stackblitz 中均显示异常。
自己本地执行也不显示。如图：


Reproduce the official water-wave chart example locally and in the linked CodeSandbox and StackBlitz contexts using @antv/g2plot at the latest version. Compare the environments and inspect the example entry point to identify why both the numeric value and wave are missing. Done means the official example renders both elements consistently in all reported environments.

Written by the indexing model from the issue text.