feat(ui): redesign all miniprogram pages

- 全局样式改为粉色(#E6508C)/金色(#DCB982)/绿色(#52c41a)配色
- 所有非tab页使用自定义导航栏，带彩色头部+标题+副标题
- login页: 粉色头部+🌸图标+微信授权登录
- scan页: 粉色头部+虚线扫码框+手动输入按钮
- ble-connect页: 蓝牙提示+搜索中/已发现设备卡片
- bind-success页: 绿色头部+成功图标+7天试用提示卡
- wear-check页: 设备信息行+佩戴指引卡片
- index首页: 粉色设备卡片+开始护理/设备管理按钮
- treatment-setup页: 模式选择+面部地图选区域
- auto-scan页: 面部轮廓+扫描线动画+检测标签
- treating页: 蓝色头部+大倒计时+渐变进度条+放松提示
- treatment-done页: 绿色头部+统计卡片+已记录提示
- subscribe-prompt页: 普通/智能模式对比+试用提示+金色订阅按钮
- subscribe-plans页: 金色头部+服务卡片+月卡/年卡选择
- subscribe-success页: 绿色头部+订阅详情卡+金色按钮
- profile页: 渐变头部+用户行+订阅卡+菜单列表
- history页: 粉色统计行+模式标签记录列表

miniprogram/pages/auto-scan/auto-scan.wxml

@@ -1,19 +1,28 @@
-<view class="container">
-  <view class="card text-center">
-    <view class="section-title">{{scanning ? '面部扫描中' : '扫描完成'}}</view>
-    <progress percent="{{scanProgress}}" stroke-width="12" activeColor="#333333" show-info />
-    <view class="text-muted mt-20">{{scanning ? '请保持设备贴合面部' : ''}}</view>
+<view class="page">
+  <view class="page-header page-header-pink">
+    <view class="page-header-title">自动扫描</view>
+    <view class="page-header-subtitle">正在识别面部...</view>
   </view>
 
-  <view class="card" wx:if="{{!scanning && regionData.length > 0}}">
-    <view class="section-title">扫描结果</view>
-    <view wx:for="{{regionData}}" wx:key="region" class="scan-result-item flex-between">
-      <text>{{item.region}}</text>
-      <text class="text-muted">{{item.pd}}</text>
+  <view class="page-content">
+    <view class="page-title">自动扫描面部区域</view>
+
+    <view class="scan-container">
+      <view class="face-outline">
+        <view class="scan-line"></view>
+      </view>
     </view>
-  </view>
 
-  <view class="btn-area-fixed" wx:if="{{!scanning}}">
-    <view class="btn-primary" bindtap="onNext">设置护理参数</view>
+    <view class="scan-hint">请将面罩对准面部</view>
+
+    <view class="scan-progress" wx:if="{{scanning}}">
+      正在扫描... <text class="highlight">{{regionData.length || 3}}</text> 个区域
+    </view>
+
+    <view class="detected-tags" wx:if="{{regionData.length > 0}}">
+      <text class="detected-tag" wx:for="{{regionData}}" wx:key="region">{{item.region}}</text>
+    </view>
+
+    <button class="btn-primary mt-30" wx:if="{{!scanning}}" bindtap="onNext">设置护理参数</button>
   </view>
 </view>