feat(cloud): 实现微信云函数 - 订阅管理与每日运势推送

- subscribe: 用户订阅/取消订阅/查询订阅状态
- daily-push: 定时查询订阅用户、生成运势、发送订阅消息
- push-test: 推送调试云函数
- 定时触发器配置，每日 7:00/12:00/18:00 推送

everything-is-suitable-uniapp/cloudfunctions/unsubscribe/index.js

@@ -0,0 +1,24 @@
+// 云函数：unsubscribe
+// 用户取消订阅，删除订阅记录
+const cloud = require('wx-server-sdk')
+cloud.init({ env: cloud.DYNAMIC_CURRENT_ENV })
+const db = cloud.database()
+
+exports.main = async (event, context) => {
+  const { OPENID } = cloud.getWXContext()
+
+  try {
+    const existing = await db.collection('subscriptions').where({
+      openid: OPENID,
+    }).get()
+
+    if (existing.data.length > 0) {
+      await db.collection('subscriptions').doc(existing.data[0]._id).remove()
+    }
+
+    return { success: true }
+  } catch (err) {
+    console.error('[unsubscribe] Error:', err)
+    return { success: false, error: err.message }
+  }
+}

everything-is-suitable-uniapp/cloudfunctions/unsubscribe/package.json

@@ -0,0 +1,9 @@
+{
+  "name": "unsubscribe",
+  "version": "1.0.0",
+  "description": "用户取消订阅每日运势推送",
+  "main": "index.js",
+  "dependencies": {
+    "wx-server-sdk": "latest"
+  }
+}