refactor: 架构升级

.agents/bak-skills/uniapp-cloud/examples/database/query.md

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+# 云数据库查询
+
+## 官方文档
+
+参考官方文档：https://doc.dcloud.net.cn/uniCloud/database.html
+
+## 条件查询
+
+```javascript
+const db = uniCloud.database()
+const users = db.collection('users')
+
+users.where({
+  age: db.command.gt(18)
+}).get().then(res => {
+  console.log(res.data)
+})
+```
+
+## 排序与分页
+
+```javascript
+users.orderBy('createdAt', 'desc')
+  .skip(0)
+  .limit(10)
+  .get()
+```
+
+## 字段筛选
+
+```javascript
+users.field({
+  name: true,
+  age: true
+}).get()
+```
+
+## 参考资源
+
+- https://doc.dcloud.net.cn/uniCloud/database.html