refactor: migrate to WeChat cloud development

- 新增 cloud-functions/ 目录（6个云函数：auth/device/subscription/treatment/user/admin）
- 云函数使用 wx-server-sdk + 云数据库（不再依赖 MySQL）
- auth 云函数通过 cloud.getWXContext() 自动获取 openid，无需手动 wx.login
- request.js 改为通过 wx.cloud.callFunction() 调用云函数
- 登录流程简化：点击授权 → 直接调 auth 云函数 → 获取用户信息
- 保留 HTTP 模式切换能力（USE_CLOUD 变量控制）

miniprogram/utils/request.js

@@ -1,13 +1,35 @@
-var API_BASE = 'https://api.lightmask.com'
-var USE_MOCK = true
+var USE_CLOUD = true
+
+function callCloud(funcName, action, data) {
+  return new Promise(function (resolve, reject) {
+    wx.cloud.callFunction({
+      name: funcName,
+      data: { action: action, data: data }
+    }).then(function (res) {
+      if (res.result && res.result.code === 0) {
+        resolve(res.result.data)
+      } else if (res.result && (res.result.code === 1001 || res.result.code === 1002)) {
+        wx.removeStorageSync('token')
+        wx.reLaunch({ url: '/pages/login/login' })
+        reject(res.result)
+      } else {
+        reject(res.result || { code: -1, message: '请求失败' })
+      }
+    }).catch(function (err) {
+      reject({ code: 2002, message: err.errMsg || '网络异常' })
+    })
+  })
+}
 
 var mock = null
-if (USE_MOCK) {
+if (!USE_CLOUD) {
   mock = require('./mock')
 }
 
-function request(options) {
-  if (USE_MOCK && mock && mock.enabled) {
+var API_BASE = 'https://api.lightmask.com'
+
+function httpRequest(options) {
+  if (mock && mock.enabled) {
     return new Promise(function (resolve) {
       setTimeout(function () {
         var result = mock.handle(options.method || 'GET', options.path, options.data)
@@ -49,6 +71,33 @@ function request(options) {
   })
 }
 
+var FUNC_MAP = {
+  '/api/v1/auth/login': { fn: 'auth', action: 'login' },
+  '/api/v1/auth/refresh': { fn: 'auth', action: 'refresh' },
+  '/api/v1/user/profile': { fn: 'user', action: 'profile' },
+  '/api/v1/user/update': { fn: 'user', action: 'update' },
+  '/api/v1/device/bind': { fn: 'device', action: 'bind' },
+  '/api/v1/device/unbind': { fn: 'device', action: 'unbind' },
+  '/api/v1/device/list': { fn: 'device', action: 'list' },
+  '/api/v1/device/detail': { fn: 'device', action: 'detail' },
+  '/api/v1/subscription/status': { fn: 'subscription', action: 'status' },
+  '/api/v1/subscription/purchase': { fn: 'subscription', action: 'purchase' },
+  '/api/v1/subscription/verify': { fn: 'subscription', action: 'verify' },
+  '/api/v1/treatment/sync': { fn: 'treatment', action: 'sync' },
+  '/api/v1/treatment/history': { fn: 'treatment', action: 'history' }
+}
+
+function request(options) {
+  if (USE_CLOUD) {
+    var mapping = FUNC_MAP[options.path]
+    if (mapping) {
+      return callCloud(mapping.fn, mapping.action, options.data)
+    }
+    return Promise.reject({ code: -1, message: '未映射的接口' })
+  }
+  return httpRequest(options)
+}
+
 function get(path, data) {
   return request({ path: path, method: 'GET', data: data })
 }