feat(i18n): 剩余15页全量接入中英(登录/注册/扫码/绑定/佩戴/扫描/治疗/订阅/帮助等)

- 3 个并行 agent 各管 5 页,互不重叠命名空间
- 全 App 18 页均 i18n.bind,22 命名空间/400 键中英对齐
- 动态文案(时长/天数/价格/区域)JS 内 i18n.t 计算;区域标签复用 common.regions

miniprogram/pages/subscribe-success/subscribe-success.wxml

@@ -1,25 +1,25 @@
 <view class="page">
   <view class="page-header page-header-green" style="padding-top: {{statusBarHeight + 24}}px;">
-    <view class="nav-back" bindtap="onBack">‹ 返回</view>
-    <view class="page-header-title">订阅成功</view>
-    <view class="page-header-subtitle">欢迎使用智能模式</view>
+    <view class="nav-back" bindtap="onBack">‹ {{i18n.common.back}}</view>
+    <view class="page-header-title">{{i18n.subSuccess.title}}</view>
+    <view class="page-header-subtitle">{{i18n.subSuccess.subtitle}}</view>
   </view>
 
   <view class="page-content">
     <view class="success-area">
       <view class="success-icon">✓</view>
-      <view class="success-title">订阅成功！</view>
+      <view class="success-title">{{i18n.subSuccess.successTitle}}</view>
     </view>
 
     <view class="sub-card">
       <view class="sub-header">
         <text class="sub-name">✨ {{planName}}</text>
-        <text class="sub-status status-badge status-badge-green">已订阅</text>
+        <text class="sub-status status-badge status-badge-green">{{i18n.subSuccess.subscribed}}</text>
       </view>
-      <view class="sub-info">有效期至：{{expiryDate}}</view>
+      <view class="sub-info">{{i18n.subSuccess.validUntil}}{{expiryDate}}</view>
     </view>
 
-    <button class="btn-primary btn-primary-gold" bindtap="onStartSmart">立即体验智能模式</button>
-    <button class="btn-secondary btn-secondary-gold" bindtap="onBackHome">返回首页</button>
+    <button class="btn-primary btn-primary-gold" bindtap="onStartSmart">{{i18n.subSuccess.startSmart}}</button>
+    <button class="btn-secondary btn-secondary-gold" bindtap="onBackHome">{{i18n.subSuccess.backHome}}</button>
   </view>
 </view>