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/test/api.test.js

@@ -87,9 +87,17 @@ test('full flow: admin, past activity, signup, checkin, export', async () => {
   const guest = await login('device-b')
   const signup = await call('POST', '/api/signup', {
     token: guest.token,
-    body: { activityId: '93', name: '张三', phone: '13800000000', company: '=cmd', sourceSharer: user.openid }
+    body: {
+      activityId: '93',
+      name: '张三',
+      phone: '13800000000',
+      company: '=cmd',
+      sourceSharer: user.openid,
+      remindStatus: 'accept'
+    }
   })
   assert.strictEqual(signup.status, 200)
+  assert.strictEqual(signup.body.data.remindAccepted, true)
   const dup = await call('POST', '/api/signup', { token: guest.token, body: { activityId: '93', name: '张三', phone: '13800000000' } })
   assert.strictEqual(dup.status, 400)
 
@@ -101,6 +109,13 @@ test('full flow: admin, past activity, signup, checkin, export', async () => {
   const stats = await call('GET', '/api/admin/stats', { token: adminToken })
   assert.strictEqual(stats.body.data.checkinCount, 1)
 
+  await call('PUT', '/api/admin/settings', { token: adminToken, body: { subscribeTmplId: 'tmpl_test_id' } })
+  const config = await call('GET', '/api/subscribe/config')
+  assert.deepStrictEqual(config.body.data.tmplIds, ['tmpl_test_id'])
+  const remind = await call('POST', '/api/admin/activities/93/remind', { token: adminToken, body: {} })
+  assert.strictEqual(remind.status, 200)
+  assert.strictEqual(remind.body.data.sent, 1)
+
   const csv = await call('GET', `/api/admin/signups/export?token=${adminToken}`)
   assert.strictEqual(csv.status, 200)
   assert.match(csv.body, /张三,13800000000,'=cmd/)