feat: 实现微信小程序码生成功能

- 新增 pages/scan/result/ 扫码结果页，展示预约详情
- 实现微信小程序码生成（wxacode.getUnlimited）
- 添加环境版本自动检测（release/trial/develop）
- 优化 qrcode-modal 组件，使用 Base64 图片替代本地生成
- 统一 API 接口抽离到 api.js 和 config.js
- 优化代码结构，提升可读性和维护性

主要变更：
1. utils/api.js: 新增 getWxacode() 接口，支持生成小程序码
2. components/qrcode-modal: 改用 API 生成小程序码，移除本地 QRCode 依赖
3. pages/scan/result: 新增扫码结果展示页，解析 scene 参数
4. utils/config.js: 新增 WXACODE 配置项

components/qrcode-modal/qrcode-modal.js

@@ -1,33 +1,28 @@
-const drawQrcode = require('../../utils/weapp.qrcode.esm.js').default
+const { getWxacode } = require('../../utils/api')
 
 Component({
   data: {
     visible: false,
     qrcodeId: '',
-    loading: true
+    loading: true,
+    qrcodePath: ''
   },
 
   methods: {
-    show(id) {
-      this.setData({ visible: true, qrcodeId: id, loading: true })
-      wx.nextTick(() => {
-        drawQrcode({
-          width: 200,
-          height: 200,
-          canvasId: 'qrcodeCanvas',
-          _this: this,
-          text: id,
-          callback: () => {
+    async show(id) {
+      this.setData({ visible: true, qrcodeId: id, loading: true, qrcodePath: '' })
+      try {
+        const base64Image = await getWxacode(id, 'pages/scan/result/index')
+        this.setData({ qrcodePath: base64Image, loading: false })
+      } catch (err) {
+        console.error('获取小程序码失败', err)
+        wx.showToast({ title: '二维码生成失败', icon: 'none' })
         this.setData({ loading: false })
       }
-        })
-      })
     },
 
     onClose() {
-      this.setData({ visible: false, qrcodeId: '' })
-    },
-
-    noop() {}
+      this.setData({ visible: false, qrcodeId: '', qrcodePath: '' })
+    }
   }
 })

components/qrcode-modal/qrcode-modal.wxml

@@ -1,8 +1,8 @@
 <view class="qrcode-modal" wx:if="{{visible}}" bindtap="onClose" catchtouchmove="noop">
   <view class="qrcode-container" catchtap catchtouchmove="noop">
     <view class="qrcode-title">预约凭证</view>
-    <view class="qrcode-canvas-wrap">
-      <canvas canvas-id="qrcodeCanvas" class="qrcode-canvas"></canvas>
+    <view class="qrcode-image-wrap">
+      <image wx:if="{{qrcodePath && !loading}}" class="qrcode-image" src="{{qrcodePath}}" mode="aspectFit" />
       <view class="qrcode-loading" wx:if="{{loading}}">
         <view class="qrcode-spinner"></view>
       </view>

components/qrcode-modal/qrcode-modal.wxss

@@ -29,16 +29,20 @@
   letter-spacing: 4rpx;
 }
 
-.qrcode-canvas-wrap {
+.qrcode-image-wrap {
   position: relative;
   width: 400rpx;
   height: 400rpx;
   border: 1rpx solid #e8eef5;
   border-radius: 16rpx;
   overflow: hidden;
+  background: #ffffff;
+  display: flex;
+  align-items: center;
+  justify-content: center;
 }
 
-.qrcode-canvas {
+.qrcode-image {
   width: 400rpx;
   height: 400rpx;
 }

pages/scan/result/index.js

@@ -1,4 +1,3 @@
-// pages/scan/result/index.js
 const { appointmentDB, formatRecord } = require('../../../utils/api')
 
 Page({
@@ -9,48 +8,49 @@ Page({
   },
 
   onLoad(options) {
-    const id = options.id
+    const id = this.extractId(options)
     if (!id) {
-      this.setData({
-        loading: false,
-        error: '缺少预约记录ID'
-      })
+      this.setData({ loading: false, error: '缺少预约记录ID' })
       return
     }
     this.loadRecordDetail(id)
   },
 
+  extractId(options) {
+    if (options.id) return options.id
+    if (!options.scene) return null
+
+    const scene = decodeURIComponent(options.scene)
+    return scene.startsWith('id=') ? scene.substring(3) : scene
+  },
+
   async loadRecordDetail(id) {
     try {
       this.setData({ loading: true })
       const result = await appointmentDB.getDetail(id)
+
       if (!result) {
-        this.setData({
-          loading: false,
-          error: '预约记录不存在'
-        })
+        this.setData({ loading: false, error: '预约记录不存在' })
         return
       }
-      const formatted = formatRecord(result)
+
       const statusMap = {
         'pending': '待审核',
         'approved': '已通过',
         'rejected': '已拒绝',
         'cancelled': '已取消'
       }
+
       this.setData({
         record: {
-          ...formatted,
-          statusText: statusMap[formatted.status] || formatted.status
+          ...formatRecord(result),
+          statusText: statusMap[result.status] || result.status
         },
         loading: false
       })
     } catch (err) {
       console.error('加载预约记录详情失败', err)
-      this.setData({
-        loading: false,
-        error: '加载失败，请稍后重试'
-      })
+      this.setData({ loading: false, error: '加载失败，请稍后重试' })
     }
   }
 })

utils/api.js

@@ -144,7 +144,33 @@ const appointmentDB = {
   }
 }
 
-module.exports = {
-  formatRecord,
-  appointmentDB
+/**
+ * 获取小程序码
+ * @param {string} scene - 场景值
+ * @param {string} page - 页面路径
+ * @returns {Promise<string>} Base64图片数据
+ */
+async function getWxacode(scene, page = 'pages/scan/result/index') {
+  const envVersion = wx.getAccountInfoSync().miniProgram.envVersion
+
+  const base64Data = await request({
+    url: BASE_URL + API.WXACODE,
+    method: 'POST',
+    header: { 'content-type': 'application/json' },
+    data: {
+      scene,
+      page,
+      width: 430,
+      envVersion
+    }
+  })
+
+  return `data:image/jpeg;base64,${base64Data}`
+}
+
+module.exports = {
+  request,
+  formatRecord,
+  appointmentDB,
+  getWxacode
 }

utils/config.js

@@ -26,7 +26,8 @@ const API = {
   APPOINTMENT_LIST: '/api/wx-mini/appointment/list',
   APPOINTMENT_CREATE: '/api/wx-mini/appointment/create',
   APPOINTMENT_CANCEL: '/api/wx-mini/appointment/cancel',
-  APPOINTMENT_DETAIL: '/api/wx-mini/appointment/detail'
+  APPOINTMENT_DETAIL: '/api/wx-mini/appointment/detail',
+  WXACODE: '/api/wx-mini/wxacode'
 }
 
 console.log('[config] 当前环境:', wx.getAccountInfoSync().miniProgram.envVersion, 'BASE_URL:', BASE_URL)