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/diary/diary.wxml

@@ -1,6 +1,6 @@
 <import src="../../templates/journal.wxml" />
 <launch-transition />
-<view class="app-shell app-shell--secondary" style="{{layoutStyle}}"><app-nav title="日记" back="{{true}}" />
+<view capture-bind:tap="onLoginSubscribeTap" class="app-shell app-shell--secondary" style="{{layoutStyle}}"><app-nav title="日记" back="{{true}}" />
 <scroll-view class="page-bg" scroll-y show-scrollbar="{{false}}" bindscrolltolower="onScrollToLower" lower-threshold="100" bindscroll="onScroll" scroll-top="{{scrollTop}}">
 <view class="j-body"><view class="j-row"><view><text class="j-eyebrow">LIFE IN WORDS</text><text class="j-page-title">生活里的每一页</text></view><button class="j-button j-button-small" bindtap="goToPublish">＋ 写日记</button></view>
 <page-state wx:if="{{loading}}" kind="loading" title="正在翻开日记" /><page-state wx:elif="{{loadError}}" kind="error" title="加载失败" action="重试" bind:action="loadData" />