新增前端订阅模块，收敛模板 ID 到唯一来源

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>

pages/add-anniversary/add-anniversary.js

@@ -3,6 +3,7 @@ const storage = require('../../utils/storage')
 const dateUtils = require('../../utils/date')
 const sync = require('../../utils/sync')
 const lunar = require('../../utils/lunar')
+const subscribe = require('../../utils/subscribe')
 
 Page({
   data: {
@@ -373,7 +374,7 @@ Page({
   requestSubscribe() {
     return new Promise((resolve, reject) => {
       wx.requestSubscribeMessage({
-        tmplIds: ['6J7Stt-lu7DKU6jblJ0nZGq_D81z5glnksf7qWfy5Yw'],
+        tmplIds: [subscribe.TEMPLATE_ID],
         success: (res) => {
           console.log('订阅消息授权结果:', res)
           resolve(res)