Ship signup sheet, subscribe reminders, cover crop, and theme updates.

Wire real WeChat app config, prefer activity cover over posters, and add admin cover cropping for the home banner.

Co-authored-by: Cursor <cursoragent@cursor.com>

server/lib/db.js

@@ -33,7 +33,11 @@ const SEED = {
   ],
   posters: [],
   signups: [],
-  checkinCodes: []
+  checkinCodes: [],
+  settings: {
+    // 微信公众平台 → 订阅消息 → 选用「活动提醒」类模板后填入模板 ID
+    subscribeTmplId: process.env.WX_SUBSCRIBE_TMPL_ID || ''
+  }
 }
 
 const COLLECTIONS = ['users', 'admins', 'adminAllowlist', 'activities', 'posters', 'signups', 'checkinCodes']
@@ -49,6 +53,16 @@ function normalize(data) {
       dirty = true
     }
   })
+  if (!data.settings || typeof data.settings !== 'object') {
+    data.settings = { subscribeTmplId: process.env.WX_SUBSCRIBE_TMPL_ID || '' }
+    dirty = true
+  } else if (typeof data.settings.subscribeTmplId !== 'string') {
+    data.settings.subscribeTmplId = process.env.WX_SUBSCRIBE_TMPL_ID || ''
+    dirty = true
+  } else if (!data.settings.subscribeTmplId && process.env.WX_SUBSCRIBE_TMPL_ID) {
+    data.settings.subscribeTmplId = process.env.WX_SUBSCRIBE_TMPL_ID
+    dirty = true
+  }
 
   // The allowlist is the only source of truth for mini-program admins.
   data.users.forEach((user) => {