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/bind-success/bind-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">绑定成功</view>
-    <view class="page-header-subtitle">设备已成功绑定</view>
+    <view class="nav-back" bindtap="onBack">‹ {{i18n.common.back}}</view>
+    <view class="page-header-title">{{i18n.bindSuccess.title}}</view>
+    <view class="page-header-subtitle">{{i18n.bindSuccess.subtitle}}</view>
   </view>
 
   <view class="page-content">
     <view class="success-area">
       <view class="success-icon">✓</view>
-      <view class="success-title">绑定成功！</view>
+      <view class="success-title">{{i18n.bindSuccess.successTitle}}</view>
     </view>
 
     <view class="tip-card">
       <text class="tip-card-icon">🎁</text>
       <view class="tip-card-body">
-        <view class="tip-card-title">{{isFreeMode ? '智能模式已开放' : '恭喜获得7天智能模式试用'}}</view>
-        <view class="tip-card-sub" wx:if="{{!isFreeMode}}">体验结束后可订阅继续使用</view>
+        <view class="tip-card-title">{{tipTitle}}</view>
+        <view class="tip-card-sub" wx:if="{{!isFreeMode}}">{{i18n.bindSuccess.trialSub}}</view>
       </view>
     </view>
 
-    <button class="btn-primary" bindtap="onStart">开始使用</button>
-    <button class="btn-secondary" bindtap="onGoHome">返回首页</button>
+    <button class="btn-primary" bindtap="onStart">{{i18n.bindSuccess.startUsing}}</button>
+    <button class="btn-secondary" bindtap="onGoHome">{{i18n.bindSuccess.goHome}}</button>
   </view>
 </view>