区分环境进行按需加载，提升本地开发加载速度。

更改侧边栏活跃色，让其和element-ui皮肤统一。
修复issue https://github.com/flipped-aurora/gin-vue-admin/issues/1347

web/src/view/layout/aside/index.vue

@@ -58,7 +58,7 @@ const getTheme = () => {
     case '#fff':
       theme.value = {
         background: '#fff',
-        activeBackground: '#4D70FF',
+        activeBackground: 'var(--el-color-primary)',
         activeText: '#fff',
         normalText: '#333',
         hoverBackground: 'rgba(64, 158, 255, 0.08)',
@@ -68,7 +68,7 @@ const getTheme = () => {
     case '#191a23':
       theme.value = {
         background: '#191a23',
-        activeBackground: '#4D70FF',
+        activeBackground: 'var(--el-color-primary)',
         activeText: '#fff',
         normalText: '#fff',
         hoverBackground: 'rgba(64, 158, 255, 0.08)',

web/src/view/layout/index.vue

@@ -246,13 +246,4 @@ const changeShadow = () => {
 
 <style lang="scss">
 @import '@/style/mobile.scss';
-
-.dark{
-  background-color: #191a23 !important;
-  color: #fff !important;
-}
-.light{
-  background-color: #fff !important;
-  color: #000 !important;
-}
 </style>