feat: 图表优化

src/views/Dashboard.vue

@@ -743,8 +743,17 @@ const createChartOption = (
       axisLabel: isPercent
         ? {
             formatter: '{value}%',
+            color: '#666',
           }
-        : undefined,
+        : {
+            color: '#666',
+          },
+      axisLine: {
+        lineStyle: { color: '#ccc' },
+      },
+      splitLine: {
+        lineStyle: { color: '#eee' },
+      },
     },
     series: data.series.map((item) => ({
       name: item.name,