refactor:change layout

src/views/layout/components/Sidebar/index.vue

@@ -0,0 +1,23 @@
+<template>
+  <el-menu mode="vertical" theme="dark" :default-active="$route.path">
+    <sidebar-item :routes="routes"></sidebar-item>
+  </el-menu>
+</template>
+
+<script>
+import SidebarItem from './SidebarItem'
+export default {
+  components: { SidebarItem },
+  computed: {
+    routes() {
+      return this.$router.options.routes
+    }
+  }
+}
+</script>
+
+<style rel="stylesheet/scss" lang="scss" scoped>
+.el-menu {
+  min-height: 100%;
+}
+</style>