要求：每个数值显示具体百分比，计算方式为： effect_cnt/total_cnt

数据结构为：{ "dt": "20240110", "effect_cnt": 725, "total_cnt": 1387, "both_effect_cnt": 912, "green_cnt": 650 },

series: [{name: '特效',type: 'bar',data: this.rows.map(item => item.effect_cnt),label: {show: true,position: 'inside',formatter: function(params) {return params.data.value;}}},

打印 formatter 的 params 里面只有 “effect_cnt” 的值，如果要进行计算，需要 params 里面包含 “total_cnt” 

{name: '特效',type: 'bar',data: this.rows.map(item => ({value: item.effect_cnt,total_cnt: item.total_cnt})),label: {show: true,position: 'top',formatter: function(params) {const value = params.data.value;const totalCnt = params.data.total_cnt;if (totalCnt === 0) {return '0%';}if (isNaN(value) || isNaN(totalCnt)) {return '';}const percentage = ((value / totalCnt) * 100).toFixed(2) + '%';return value + '次' + '\n' + percentage;}}},