refactor: 重构微信小程序从云开发迁移至后端API

将云数据库操作改为调用后端API接口
提取登录失败处理逻辑到单独方法
添加环境配置和API请求工具类
移除云开发相关配置

app.js

@@ -1,16 +1,8 @@
 // app.js
+const { BASE_URL, API } = require('./utils/config')
+
 App({
   onLaunch() {
-    if (!wx.cloud) {
-      console.error('请使用 2.2.3 或以上的基础库以使用云能力')
-    } else {
-      wx.cloud.init({
-        traceUser: true
-      })
-    }
-
-
-
     // 自动静默登录：wx.login 获取 code，再请求后端接口换取 openid
     this.silentLogin()
   },
@@ -22,66 +14,55 @@ App({
           this.loginWithCode(loginRes.code)
         } else {
           console.error('wx.login 失败', loginRes.errMsg)
-          this.globalData.isLoggedIn = false
-          this.globalData.loginFailed = true
-          if (this.loginReadyCallback) {
-            this.loginReadyCallback(null)
-          }
+          this.handleLoginFail()
         }
       },
       fail: (err) => {
         console.error('wx.login 调用失败', err)
-        this.globalData.isLoggedIn = false
-        this.globalData.loginFailed = true
-        if (this.loginReadyCallback) {
-          this.loginReadyCallback(null)
-        }
+        this.handleLoginFail()
       }
     })
   },
 
   loginWithCode(code) {
     wx.request({
-      url: 'https://xcx.yun.588580.xyz/api/wx-mini/login',
+      url: BASE_URL + API.LOGIN,
       method: 'GET',
       data: { code },
       success: (res) => {
         const result = res.data
         if (result && result.code === 0 && result.data) {
-          const openid = result.data.openid
           const userInfo = {
-            openid,
+            openid: result.data.openid,
             sessionKey: result.data.session_key,
             unionid: result.data.unionid || ''
           }
-
           this.globalData.userInfo = userInfo
           this.globalData.isLoggedIn = true
           wx.setStorageSync('userInfo', userInfo)
-
           if (this.loginReadyCallback) {
             this.loginReadyCallback(userInfo)
           }
         } else {
           console.error('后端登录失败', result)
-          this.globalData.isLoggedIn = false
-          this.globalData.loginFailed = true
-          if (this.loginReadyCallback) {
-            this.loginReadyCallback(null)
-          }
+          this.handleLoginFail()
         }
       },
       fail: (err) => {
         console.error('请求后端登录接口失败', err)
-        this.globalData.isLoggedIn = false
-        this.globalData.loginFailed = true
-        if (this.loginReadyCallback) {
-          this.loginReadyCallback(null)
-        }
+        this.handleLoginFail()
       }
     })
   },
 
+  handleLoginFail() {
+    this.globalData.isLoggedIn = false
+    this.globalData.loginFailed = true
+    if (this.loginReadyCallback) {
+      this.loginReadyCallback(null)
+    }
+  },
+
   globalData: {
     userInfo: null,
     isLoggedIn: false,