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/subscribe-plans/subscribe-plans.wxml

@@ -1,15 +1,38 @@
-<view class="container">
-  <view wx:for="{{plans}}" wx:key="plan"
-        class="card plan-card {{selected === item.plan ? 'plan-active' : ''}}"
-        bindtap="onSelect" data-plan="{{item.plan}}">
-    <view class="plan-name">{{item.name}}</view>
-    <view class="plan-price">{{item.price}}</view>
-    <view class="plan-desc text-muted">{{item.desc}}</view>
+<view class="page">
+  <view class="page-header page-header-gold">
+    <view class="page-header-title">订阅服务</view>
+    <view class="page-header-subtitle">解锁智能模式</view>
   </view>
 
-  <view class="btn-area-fixed">
-    <view class="btn-primary" bindtap="onPurchase" disabled="{{purchasing || !selected}}">
-      {{purchasing ? '处理中...' : '立即订阅'}}
+  <view class="page-content">
+    <view class="page-title">选择订阅套餐</view>
+
+    <view class="service-card">
+      <view class="service-icon">✨</view>
+      <view class="service-info">
+        <view class="service-name">智能模式</view>
+        <view class="service-desc">根据皮肤状态自动调节</view>
+      </view>
     </view>
+
+    <view class="plans">
+      <view class="plan {{selected === 'monthly' ? 'selected' : ''}}" bindtap="onSelect" data-plan="monthly">
+        <view class="plan-price">¥99</view>
+        <view class="plan-name">月卡</view>
+        <view class="plan-save">约3.3元/天</view>
+      </view>
+      <view class="plan {{selected === 'yearly' ? 'selected' : ''}}" bindtap="onSelect" data-plan="yearly">
+        <view class="plan-tag" wx:if="{{selected !== 'yearly'}}">推荐</view>
+        <view class="plan-tag plan-tag-active" wx:else>推荐</view>
+        <view class="plan-price">¥899</view>
+        <view class="plan-name">年卡</view>
+        <view class="plan-save">省¥289</view>
+      </view>
+    </view>
+
+    <button class="btn-primary btn-primary-gold" bindtap="onPurchase" disabled="{{purchasing}}" loading="{{purchasing}}">
+      确认支付
+    </button>
+    <view class="agreement">支付即表示同意《订阅协议》</view>
   </view>
 </view>