[I] [Bug] 折线图鼠标悬浮圆点无法放大,symbolSize配置了无效 [echarts]

[via GitHub]

zhoufanglu opened a new issue, #20922:
URL: https://github.com/apache/echarts/issues/20922

   ### Version
   
   5.22
   
   ### Link to Minimal Reproduction
   
   https://github.com/apache/echarts/issues?q=symbolSize
   
   ### Steps to Reproduce
   
   这是代码
   ```js
   option = {
     xAxis: {
       type: 'category',
       data: ['Mon', 'Tue', 'Wed', 'Thu', 'Fri', 'Sat', 'Sun']
     },
     yAxis: {
       type: 'value'
     },
     series: [
       {
         symbolSize: 6,
         emphasis: {
               symbolSize: 20, // 先测试较小值
               itemStyle: {
                 color: '#001439', // 用高对比色验证是否触发
                 borderWidth: 0,
               },
               focus: 'self', // 强制聚焦到当前元素
             },
         data: [150, 230, 224, 218, 135, 147, 260],
         type: 'line'
       }
     ]
   };
   ```
   
   ### Current Behavior
   
   -
   
   ### Expected Behavior
   
   -
   
   ### Environment
   
   ```markdown
   
   ```
   
   ### Any additional comments?
   
   _No response_


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