CN-342 图表优化

1.type=11的折线图，Y轴最小间隔是1，需要将其放开为包含小数，使曲线可以充满图表
2.detection顶部柱状图优化调整：
    (1).不同严重程度的柱体展示从并排改为堆叠
    (2).x轴时间格式精简为mm:ss，且数量过多导致x轴label重叠时，隐藏一部分label

src/views/detections/options/detectionOptions.js

@@ -52,7 +52,7 @@ export const multipleBarOption = {
   legend: {
     icon: 'circle',
     top: 10,
-    right: 10,
+    right: 30,
     itemWidth: 10, // 设置宽度
     itemHeight: 10 // 设置高度
   },
@@ -72,7 +72,7 @@ export const multipleBarOption = {
     },
     axisLabel: {
       color: '#737373',
-      interval: 0
+      interval: 'auto'
     },
     splitLine: {
       show: false
@@ -104,6 +104,10 @@ export const multipleBarOption = {
     {
       name: 'critical',
       type: 'bar',
+      stack:'eventSeverityTrend',
+      emphasis: {
+        focus: 'series'
+      },
       barWidth: 15,
       seriesLayoutBy: 'row',
       itemStyle: {
@@ -113,6 +117,10 @@ export const multipleBarOption = {
     {
       name: 'high',
       type: 'bar',
+      stack:'eventSeverityTrend',
+      emphasis: {
+        focus: 'series'
+      },
       barWidth: 15,
       seriesLayoutBy: 'row',
       itemStyle: {
@@ -122,6 +130,10 @@ export const multipleBarOption = {
     {
       name: 'medium',
       type: 'bar',
+      stack:'eventSeverityTrend',
+      emphasis: {
+        focus: 'series'
+      },
       barWidth: 15,
       seriesLayoutBy: 'row',
       itemStyle: {
@@ -131,6 +143,10 @@ export const multipleBarOption = {
     {
       name: 'low',
       type: 'bar',
+      stack:'eventSeverityTrend',
+      emphasis: {
+        focus: 'series'
+      },
       barWidth: 15,
       seriesLayoutBy: 'row',
       itemStyle: {
@@ -140,6 +156,10 @@ export const multipleBarOption = {
     {
       name: 'info',
       type: 'bar',
+      stack:'eventSeverityTrend',
+      emphasis: {
+        focus: 'series'
+      },
       barWidth: 15,
       seriesLayoutBy: 'row',
       itemStyle: {