chore: Vue 项目结构优化，移除无用代码

frontend/src/views/MainView.vue

@@ -0,0 +1,19 @@
+<template>
+  <el-config-provider :button="{ autoInsertSpace: true }" :locale="locale">
+    <RouterView />
+
+    <header>
+      <div class="wrapper">
+
+        <nav>
+          <!-- <RouterLink to="/">Home</RouterLink> -->
+          <!-- <RouterLink to="/about">About</RouterLink> -->
+        </nav>
+      </div>
+    </header>
+  </el-config-provider>
+</template>
+
+<script setup lang="ts">
+import { RouterLink, RouterView } from 'vue-router'
+</script>