fix: 监测曲线功能优化。

src/views/fishery/monitorHistory/index.vue

@@ -455,6 +455,8 @@ const updateChart = () => {
         type: chartType.value,
         data: yData,
         smooth: chartType.value === 'line',
+        symbol: 'circle', // 使用圆形标记
+        symbolSize: chartType.value === 'line' ? 0 : 6, // 折线图默认不显示点,柱状图不受影响
         itemStyle: {
           color: config.color
         },
@@ -463,6 +465,17 @@ const updateChart = () => {
         } : undefined,
         areaStyle: chartType.value === 'line' ? {
           opacity: 0.1
+        } : undefined,
+        emphasis: chartType.value === 'line' ? {
+          symbol: 'circle',
+          symbolSize: 12,
+          itemStyle: {
+            color: config.color,
+            borderColor: '#fff',
+            borderWidth: 3,
+            shadowBlur: 8,
+            shadowColor: config.color
+          }
         } : undefined
       }
     ]