perf[navbar]: set langSelect to component && refine errorLog component

src/components/LangSelect/index.vue

@@ -0,0 +1,41 @@
+<template>
+  <el-dropdown trigger="click" class='international' @command="handleSetLanguage">
+    <div>
+      <svg-icon class-name='international-icon' icon-class="language" />
+    </div>
+    <el-dropdown-menu slot="dropdown">
+      <el-dropdown-item command="zh" :disabled="language==='zh'">中文</el-dropdown-item>
+      <el-dropdown-item command="en" :disabled="language==='en'">English</el-dropdown-item>
+    </el-dropdown-menu>
+  </el-dropdown>
+</template>
+
+<script>
+export default {
+  computed: {
+    language() {
+      return this.$store.getters.language
+    }
+  },
+  methods: {
+    handleSetLanguage(lang) {
+      this.$i18n.locale = lang
+      this.$store.dispatch('setLanguage', lang)
+      this.$message({
+        message: 'switch language success',
+        type: 'success'
+      })
+    }
+  }
+}
+</script>
+
+<style scoped>
+.international-icon {
+  font-size: 20px;
+  cursor: pointer;
+  vertical-align: -5px;
+}
+</style>
+
+