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/scan/scan.js

@@ -52,5 +52,24 @@ Page({
         error: err.message || '绑定失败'
       })
     })
+  },
+
+  onManualInput: function () {
+    var self = this
+    wx.showModal({
+      title: '手动输入设备号',
+      editable: true,
+      placeholderText: '请输入16位设备ID',
+      success: function (res) {
+        if (res.confirm && res.content) {
+          var deviceId = res.content.trim()
+          if (/^[0-9A-Fa-f]{16}$/.test(deviceId)) {
+            self.bindDevice(deviceId)
+          } else {
+            wx.showToast({ title: '设备号格式不正确', icon: 'none' })
+          }
+        }
+      }
+    })
   }
 })

miniprogram/pages/scan/scan.json

@@ -1,3 +1,4 @@
 {
+  "navigationStyle": "custom",
   "navigationBarTitleText": "扫码绑定"
 }

miniprogram/pages/scan/scan.wxml

@@ -1,29 +1,20 @@
-<view class="container">
-  <view class="card text-center">
-    <view class="section-title">绑定新设备</view>
-    <view class="text-muted mb-30">请扫描设备底部或包装盒上的二维码</view>
-    <view class="btn-primary" bindtap="onScan" disabled="{{scanning}}">
-      {{scanning ? '扫描中...' : '扫描二维码'}}
-    </view>
+<view class="page">
+  <view class="page-header page-header-pink">
+    <view class="page-header-title">扫码绑定</view>
+    <view class="page-header-subtitle">扫描设备底部二维码</view>
   </view>
 
-  <view class="card" wx:if="{{error}}">
-    <text class="text-error">{{error}}</text>
-  </view>
+  <view class="page-content">
+    <view class="scan-area">
+      <text class="scan-icon">📷</text>
+      <text class="scan-text">扫描设备二维码</text>
+    </view>
 
-  <view class="card">
-    <view class="section-title">绑定步骤</view>
-    <view class="step">
-      <text class="step-num">1</text>
-      <text class="step-text">扫描设备二维码获取设备ID</text>
-    </view>
-    <view class="step">
-      <text class="step-num">2</text>
-      <text class="step-text">打开蓝牙连接设备</text>
-    </view>
-    <view class="step">
-      <text class="step-num">3</text>
-      <text class="step-text">绑定成功，开始使用</text>
-    </view>
+    <button class="btn-primary" bindtap="onScan" disabled="{{scanning}}">
+      {{scanning ? '扫描中...' : '扫码'}}
+    </button>
+    <button class="btn-secondary" bindtap="onManualInput">手动输入设备号</button>
+
+    <view class="error-text" wx:if="{{error}}">{{error}}</view>
   </view>
 </view>

miniprogram/pages/scan/scan.wxss

@@ -1,23 +1,32 @@
-.step {
+.scan-area {
+  width: 300rpx;
+  height: 300rpx;
+  margin: 40rpx auto;
+  border: 6rpx dashed #E6508C;
+  border-radius: 24rpx;
   display: flex;
+  flex-direction: column;
   align-items: center;
-  padding: 16rpx 0;
+  justify-content: center;
+  color: #E6508C;
 }
 
-.step-num {
-  width: 48rpx;
-  height: 48rpx;
-  border-radius: 50%;
-  background-color: #333333;
-  color: #ffffff;
-  font-size: 24rpx;
-  text-align: center;
-  line-height: 48rpx;
-  margin-right: 20rpx;
-  flex-shrink: 0;
+.scan-icon {
+  font-size: 100rpx;
+  margin-bottom: 20rpx;
 }
 
-.step-text {
+.scan-text {
   font-size: 28rpx;
-  color: #333333;
+}
+
+.error-text {
+  text-align: center;
+  color: #ff4d4f;
+  font-size: 26rpx;
+  margin-top: 20rpx;
+}
+
+.btn-secondary::after {
+  border: none;
 }