[Bug] Taro 4.x中使用时，更新spec不会刷新图表

Version

2.0.6

Link to Minimal Reproduction

https://github.com/TTwilight/vcharts-demo

Steps to Reproduce

1. 设置了一个自动刷新spec的值，触发了更新事件，但图表没有刷新

Current Behavior

<VChart type="weapp" spec={spec} options={{ // renderCanvas:'canvasId' // options3d: { // enable: false, // enableView3dTransform: false, // }, // mode: "miniApp", }} canvasId="canvasId" style={{ height: "45vh", width: "70%", // zIndex: 1, }} onChartInit={(chart) => { console.log("图表初始化完成:", chart); chartIns.current = chart; }} onChartReady={(chart) => { console.log("图表渲染完成:", chart); }} onChartUpdate={(chart) => { console.log("图表更新完成:", chart); }} />

Expected Behavior

自动刷新spec的值，图表同步更新

Environment

- OS: Macos 26.0.1 
- Browser: chrome 141.0.7390.109（正式版本） (arm64)
- Framework: Taro 4.1.5
- 开发工具：微信开发者工具

Any additional comments?

No response

Start with the minimal reproduction at https://github.com/TTwilight/vcharts-demo and reproduce the issue using Taro 4.1.5 in the WeChat developer tools. Trace how the VChart component receives the changing spec and whether the update callback runs. Done means that automatically changing spec values refreshes the chart in the reported environment.