初始化

src/layout/Layout.vue

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+<template>
+  <!-- 整体后台布局容器 -->
+  <el-container class="layout-container">
+    <!-- 侧边栏 -->
+    <el-aside width="220px" class="sidebar">
+      <!-- Logo区域 -->
+      <div class="logo-container">
+        <el-icon class="logo-icon"><ChatDotSquare /></el-icon>
+        <span class="logo-title">AI面试官</span>
+      </div>
+      <!-- 
+        el-scrollbar: Element Plus的滚动条组件。
+        通过CSS设置其高度为100%，它会自动在内容溢出时显示滚动条，
+        否则滚动条不显示，解决了您提出的问题。
+      -->
+      <el-scrollbar style="height: calc(100% - 60px);"> 
+        <el-menu
+          :default-active="$route.path"  
+          background-color="#0a192f"    
+          text-color="#8892b0"          
+          active-text-color="#64ffda"   
+          :router="true"                 
+        >
+          <el-menu-item index="/">
+            <el-icon><House /></el-icon>
+            <span>仪表盘</span>
+          </el-menu-item>
+          <el-menu-item index="/interview">
+            <el-icon><ChatLineRound /></el-icon>
+            <span>模拟面试</span>
+          </el-menu-item>
+          <el-menu-item index="/question-bank">
+            <el-icon><MessageBox /></el-icon>
+            <span>题库管理</span>
+          </el-menu-item>
+          <el-menu-item index="/history">
+            <el-icon><Finished /></el-icon>
+            <span>会话历史</span>
+          </el-menu-item>
+          <el-menu-item index="/answer-record">
+            <el-icon><List /></el-icon>
+            <span>答题记录</span>
+          </el-menu-item>
+        </el-menu>
+      </el-scrollbar>
+    </el-aside>
+
+    <!-- 右侧主内容区 -->
+    <el-container>
+      <el-header class="header">
+        <div class="header-title">欢迎使用AI模拟面试平台</div>
+      </el-header>
+      <el-main class="main-content">
+        <router-view v-slot="{ Component }">
+          <transition name="fade-transform" mode="out-in">
+            <component :is="Component" />
+          </transition>
+        </router-view>
+      </el-main>
+    </el-container>
+  </el-container>
+</template>
+
+<script setup>
+import {House, ChatLineRound, MessageBox, ChatDotSquare, Finished, List} from '@element-plus/icons-vue';
+</script>
+
+<style scoped>
+.layout-container {
+  height: 100vh;
+}
+
+/* 更新后的侧边栏样式 */
+.sidebar {
+  background-color: #0a192f; /* 更深、更现代的科技蓝 */
+  transition: width 0.28s;
+}
+
+.logo-container {
+  display: flex;
+  align-items: center;
+  justify-content: center;
+  height: 60px;
+  background-color: #0a192f;
+  color: #ccd6f6;
+  font-size: 1.3em;
+  font-weight: 600;
+}
+
+.logo-icon {
+  margin-right: 12px;
+  color: #64ffda; /* 高亮颜色 */
+}
+
+.el-menu {
+  border-right: none;
+}
+
+/* 菜单项激活时的样式 */
+.el-menu-item.is-active {
+    background-color: #112240 !important; /* 深色背景 */
+    border-left: 3px solid #64ffda; /* 左侧高亮条 */
+}
+
+.el-menu-item:hover {
+    background-color: #112240; /* 悬浮背景色 */
+}
+
+.header {
+  display: flex;
+  align-items: center;
+  background-color: #fff;
+  box-shadow: 0 1px 4px rgba(0, 21, 41, 0.08);
+  padding: 0 20px;
+}
+
+.header-title {
+  font-size: 1.1em;
+  color: #303133;
+}
+
+.main-content {
+  padding: 20px;
+  background-color: #f0f2f5;
+}
+
+.fade-transform-enter-active,
+.fade-transform-leave-active {
+  transition: all 0.5s;
+}
+
+.fade-transform-enter-from,
+.fade-transform-leave-to {
+  opacity: 0;
+  transform: translateX(-30px);
+}
+</style>