feat: add account deletion, announcements and subscription renewal

Support personal records and persistent smoking visibility. Add upload quota preflight, file cleanup, privacy entry, image caching and revision-based page refresh across the backend, admin and mini program.

weapp/pages/punch/punch.wxml

@@ -1,4 +1,4 @@
-<view class="app-shell app-shell--secondary" style="{{layoutStyle}}">
+<view capture-bind:tap="onLoginSubscribeTap" class="app-shell app-shell--secondary" style="{{layoutStyle}}">
 <launch-transition />
 <!-- pages/punch/punch.wxml - 情侣打卡 -->
 <app-nav title="打卡" back="{{true}}" />
@@ -25,7 +25,8 @@
       </view>
     </view>
 
-    <smoking-card id="smoking" bind:updated="onSmokingUpdated" />
+    <view class="smoking-preference"><view><text class="j-small-title">抽烟记录</text><text class="j-caption">显示设置保存到账号，重新安装后仍生效</text></view><switch wx:if="{{smokingKnown}}" checked="{{smokingVisible}}" disabled="{{smokingSaving}}" color="#667E75" bindchange="toggleSmoking" /><text wx:elif="{{smokingError}}" bindtap="loadSmokingPreference">重试</text><text wx:else>加载中</text></view>
+    <smoking-card wx:if="{{smokingKnown && smokingVisible}}" id="smoking" bind:updated="onSmokingUpdated" />
 
     <!-- 打卡列表 -->
     <view class="checkin-cards" wx:if="{{!loading && !loadError && checkins.length > 0}}">