feat: 移动端自适应布局

- 768px 断点: 侧边栏变为抽屉式滑出, 汉堡按钮切换
- 移动端顶栏: 显示当前组件名称
- 移动端 Tab: 配置表单/代码预览一键切换
- 遮罩层: 点击遮罩自动收起侧边栏
- 切换组件后自动收起侧边栏并回到表单 tab
- 平板端 (1024px) 表单区域适当缩窄

src/App.vue

@@ -1,14 +1,57 @@
 <template>
   <div class="app-layout">
-    <Sidebar v-model="activeSchemaId" />
-    <div class="main-content">
+    <!-- 移动端顶部栏 -->
+    <div class="mobile-header">
+      <button class="hamburger" @click="sidebarOpen = !sidebarOpen">
+        <el-icon :size="22"><Expand /></el-icon>
+      </button>
+      <div class="mobile-logo">
+        <h1>ConfTemplate</h1>
+      </div>
+      <el-tag size="small" type="info">{{ currentSchema.name }}</el-tag>
+    </div>
+
+    <!-- 遮罩层 -->
+    <div
+      v-if="sidebarOpen"
+      class="sidebar-overlay"
+      @click="sidebarOpen = false"
+    />
+
+    <!-- 侧边栏 -->
+    <div class="sidebar-wrapper" :class="{ open: sidebarOpen }">
+      <Sidebar
+        v-model="activeSchemaId"
+        @select="sidebarOpen = false"
+      />
+    </div>
+
+    <!-- 移动端 Tab 切换 -->
+    <div class="mobile-tabs">
+      <button
+        :class="{ active: activeTab === 'form' }"
+        @click="activeTab = 'form'"
+      >
+        <el-icon><Edit /></el-icon> 配置表单
+      </button>
+      <button
+        :class="{ active: activeTab === 'preview' }"
+        @click="activeTab = 'preview'"
+      >
+        <el-icon><Document /></el-icon> 代码预览
+      </button>
+    </div>
+
+    <!-- 主内容区 -->
+    <div class="main-content" :class="{ 'mobile-hidden': activeTab !== 'form' }">
       <ConfigForm
         :key="activeSchemaId"
         :schema="currentSchema"
         @update:config="onConfigUpdate"
       />
     </div>
-    <div class="preview-content">
+
+    <div class="preview-content" :class="{ 'mobile-hidden': activeTab !== 'preview' }">
       <CodePreview :code="generatedCode" :schema="currentSchema" />
     </div>
   </div>
@@ -16,6 +59,7 @@
 
 <script setup>
 import { ref, computed, watch } from 'vue'
+import { Expand, Edit, Document } from '@element-plus/icons-vue'
 import Sidebar from './components/Sidebar.vue'
 import ConfigForm from './components/ConfigForm.vue'
 import CodePreview from './components/CodePreview.vue'
@@ -23,12 +67,16 @@ import { schemas, generators, getDefaultValues } from './schemas'
 
 const activeSchemaId = ref('nginx')
 const currentConfig = ref({})
+const sidebarOpen = ref(false)
+const activeTab = ref('form')
 
 const currentSchema = computed(() => schemas[activeSchemaId.value])
 
 // 当 schema 切换时，立即用新 schema 的默认值重置 config
 watch(activeSchemaId, (newId) => {
   currentConfig.value = getDefaultValues(schemas[newId])
+  // 移动端切换组件后自动切到表单 tab
+  activeTab.value = 'form'
 })
 
 const generatedCode = computed(() => {
@@ -59,6 +107,7 @@ html, body, #app {
   font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
 }
 
+/* ===== 桌面端布局 ===== */
 .app-layout {
   display: flex;
   height: 100vh;
@@ -80,6 +129,21 @@ html, body, #app {
   overflow: hidden;
 }
 
+/* 移动端顶栏 - 默认隐藏 */
+.mobile-header {
+  display: none;
+}
+
+/* 遮罩层 - 默认隐藏 */
+.sidebar-overlay {
+  display: none;
+}
+
+/* 移动端 Tab - 默认隐藏 */
+.mobile-tabs {
+  display: none;
+}
+
 /* Custom scrollbar */
 ::-webkit-scrollbar {
   width: 6px;
@@ -111,4 +175,136 @@ html, body, #app {
 .el-select {
   width: 100%;
 }
+
+/* ===== 平板端 (<= 1024px) ===== */
+@media (max-width: 1024px) {
+  .main-content {
+    flex: 0 0 360px;
+    min-width: 320px;
+    max-width: 400px;
+  }
+}
+
+/* ===== 移动端 (<= 768px) ===== */
+@media (max-width: 768px) {
+  .app-layout {
+    flex-direction: column;
+    position: relative;
+  }
+
+  /* 移动端顶栏 */
+  .mobile-header {
+    display: flex;
+    align-items: center;
+    gap: 10px;
+    padding: 10px 14px;
+    background: #1a1a2e;
+    color: #fff;
+    flex-shrink: 0;
+    z-index: 100;
+  }
+
+  .hamburger {
+    background: none;
+    border: none;
+    color: #fff;
+    cursor: pointer;
+    padding: 6px;
+    border-radius: 6px;
+    display: flex;
+    align-items: center;
+    justify-content: center;
+    transition: background 0.2s;
+  }
+
+  .hamburger:hover {
+    background: rgba(255, 255, 255, 0.1);
+  }
+
+  .mobile-logo h1 {
+    font-size: 16px;
+    font-weight: 700;
+    background: linear-gradient(135deg, #667eea, #764ba2);
+    -webkit-background-clip: text;
+    -webkit-text-fill-color: transparent;
+  }
+
+  /* 遮罩层 */
+  .sidebar-overlay {
+    display: block;
+    position: fixed;
+    top: 0;
+    left: 0;
+    right: 0;
+    bottom: 0;
+    background: rgba(0, 0, 0, 0.5);
+    z-index: 199;
+  }
+
+  /* 侧边栏变为抽屉 */
+  .sidebar-wrapper {
+    position: fixed;
+    top: 0;
+    left: -280px;
+    bottom: 0;
+    z-index: 200;
+    transition: left 0.3s ease;
+  }
+
+  .sidebar-wrapper.open {
+    left: 0;
+  }
+
+  /* 移动端 Tab */
+  .mobile-tabs {
+    display: flex;
+    background: #fff;
+    border-bottom: 1px solid #ebeef5;
+    flex-shrink: 0;
+    z-index: 50;
+  }
+
+  .mobile-tabs button {
+    flex: 1;
+    padding: 10px;
+    border: none;
+    background: none;
+    font-size: 13px;
+    font-weight: 500;
+    color: #909399;
+    cursor: pointer;
+    display: flex;
+    align-items: center;
+    justify-content: center;
+    gap: 5px;
+    border-bottom: 2px solid transparent;
+    transition: all 0.2s;
+  }
+
+  .mobile-tabs button.active {
+    color: #667eea;
+    border-bottom-color: #667eea;
+    background: rgba(102, 126, 234, 0.04);
+  }
+
+  /* 主内容区全宽 */
+  .main-content {
+    flex: 1;
+    min-width: 0;
+    max-width: none;
+    border-right: none;
+    overflow: hidden;
+  }
+
+  .preview-content {
+    flex: 1;
+    min-width: 0;
+    overflow: hidden;
+  }
+
+  /* 隐藏非活跃 tab */
+  .mobile-hidden {
+    display: none !important;
+  }
+}
 </style>

src/components/Sidebar.vue

@@ -41,7 +41,7 @@
               :key="itemId"
               class="nav-item"
               :class="{ active: modelValue === itemId }"
-              @click="$emit('update:modelValue', itemId)"
+              @click="$emit('update:modelValue', itemId); $emit('select')"
             >
               <el-icon><component :is="schemas[itemId].icon" /></el-icon>
               <div class="nav-item-info">
@@ -74,7 +74,7 @@ const props = defineProps({
   modelValue: String,
 })
 
-defineEmits(['update:modelValue'])
+const emit = defineEmits(['update:modelValue', 'select'])
 
 const searchQuery = ref('')