接入自建后端 + Gitea CI/CD

- 新增 server/：Node + Express + SQLite + node-cron 实现登录、纪念日 CRUD 和定时订阅消息推送
- 新增 .gitea/workflows/deploy.yml：推送即触发群晖 Docker 部署，监听 15002
- utils/api.js：自动按 envVersion 切换本地/线上 BASE_URL
- app.js 与 add-anniversary.js 移除 wx.cloud 调用，改走自建后端
- cloudfunctions/ 暂保留以便回滚
- 一并提交此前未入库的首页 / 设置页 / 日历 / 万年历等改造

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

pages/calendar/calendar.js

@@ -1,11 +1,12 @@
 // calendar.js
 const storage = require('../../utils/storage')
 const dateUtils = require('../../utils/date')
+const { TYPE_NAMES, TYPE_ICONS, IMPORTANCE_COLORS } = require('../../utils/constants')
 
 Page({
   data: {
-    currentYear: 2024,
-    currentMonth: 1,
+    currentYear: new Date().getFullYear(),
+    currentMonth: new Date().getMonth() + 1,
     calendarDays: [],
     monthEvents: []
   },
@@ -20,100 +21,75 @@ Page({
     this.loadMonthEvents()
   },
 
+  /**
+   * 构建当月事件索引 { "day": [anniversary, ...] }
+   */
+  buildEventIndex(anniversaries, year, month) {
+    const index = {}
+    for (const a of anniversaries) {
+      if (a.solarYear === year && a.solarMonth === month) {
+        const key = String(a.solarDay)
+        if (!index[key]) index[key] = []
+        index[key].push(a)
+      }
+    }
+    return index
+  },
+
   /**
    * 渲染日历
    */
   renderCalendar() {
     const { currentYear, currentMonth } = this.data
     const anniversaries = storage.getAnniversaries()
-    
-    // 获取本月第一天是星期几
+
+    // 预建事件索引，避免 O(n×m) 过滤
+    const eventIndex = this.buildEventIndex(anniversaries, currentYear, currentMonth)
+
     const firstDay = new Date(currentYear, currentMonth - 1, 1)
     const startWeekday = firstDay.getDay()
-    
-    // 获取本月天数
     const daysInMonth = new Date(currentYear, currentMonth, 0).getDate()
-    
-    // 获取上个月的天数
     const prevMonthDays = new Date(currentYear, currentMonth - 1, 0).getDate()
-    
-    // 构建日历天数数组
+
     const calendarDays = []
-    const today = new Date()
-    
+
     // 填充上个月的日期
     for (let i = startWeekday - 1; i >= 0; i--) {
       const day = prevMonthDays - i
-      calendarDays.push({
-        day,
-        date: new Date(currentYear, currentMonth - 2, day),
-        isToday: false,
-        isOtherMonth: true,
-        events: [],
-        hasMore: false
-      })
+      calendarDays.push({ day, isToday: false, isOtherMonth: true, events: [], hasMore: false })
     }
-    
+
     // 填充本月的日期
     for (let day = 1; day <= daysInMonth; day++) {
       const date = new Date(currentYear, currentMonth - 1, day)
       const isToday = dateUtils.isToday(date)
-      
-      // 查找该日期的纪念日
-      const events = anniversaries
-        .filter(a => this.isAnniversaryOnDate(a, date))
-        .map(a => ({
-          id: a.id,
-          color: this.getEventColor(a)
-        }))
-        .slice(0, 3)
-      
+      const allEvents = eventIndex[String(day)] || []
+      const events = allEvents.slice(0, 3).map(a => ({ id: a.id, color: this.getEventColor(a) }))
+
       calendarDays.push({
         day,
-        date,
         isToday,
         isOtherMonth: false,
         events,
-        hasMore: events.length > 2,
-        moreCount: anniversaries.filter(a => this.isAnniversaryOnDate(a, date)).length - 2
+        hasMore: allEvents.length > 3,
+        moreCount: allEvents.length - 3
       })
     }
-    
+
     // 填充下个月的日期（补全6行）
     const remainingDays = 42 - calendarDays.length
     for (let day = 1; day <= remainingDays; day++) {
-      calendarDays.push({
-        day,
-        date: new Date(currentYear, currentMonth, day),
-        isToday: false,
-        isOtherMonth: true,
-        events: [],
-        hasMore: false
-      })
+      calendarDays.push({ day, isToday: false, isOtherMonth: true, events: [], hasMore: false })
     }
-    
-    this.setData({ calendarDays })
-  },
 
-  /**
-   * 判断纪念日是否在某日期
-   */
-  isAnniversaryOnDate(anniversary, date) {
-    return anniversary.solarYear === date.getFullYear() &&
-           anniversary.solarMonth === date.getMonth() + 1 &&
-           anniversary.solarDay === date.getDate()
+    this.setData({ calendarDays })
   },
 
   /**
    * 获取事件颜色
    */
   getEventColor(anniversary) {
-    const colors = {
-      high: '#ff5722',
-      medium: '#ff9800',
-      low: '#07c160'
-    }
-    return colors[anniversary.importance] || '#07c160'
+    return IMPORTANCE_COLORS[anniversary.importance] || '#07c160'
   },
 
   /**
@@ -150,28 +126,14 @@ Page({
    * 获取类型图标
    */
   getTypeIcon(type) {
-    const icons = {
-      birthday: '🎂',
-      lunar_birthday: '🌙',
-      wedding: '💍',
-      engagement: '💕',
-      other: '📅'
-    }
-    return icons[type] || '📅'
+    return TYPE_ICONS[type] || '📅'
   },
 
   /**
    * 获取类型名称
    */
   getTypeName(type) {
-    const names = {
-      birthday: '公历生日',
-      lunar_birthday: '农历生日',
-      wedding: '结婚纪念日',
-      engagement: '订婚纪念日',
-      other: '其他纪念日'
-    }
-    return names[type] || '其他'
+    return TYPE_NAMES[type] || '其他'
   },
 
   /**