refactor(Activities): 优化地图URL传递方式

- ActivitiesDetail页面通过detailAPI获取地图URL并保留
- 导航时通过URL参数传递地图URL，避免Activities页面重复调用API
- Activities页面从URL参数读取地图URL，移除getMapUrlAPI调用
- 提升性能，减少不必要的网络请求

Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>

@@ -39,7 +39,6 @@ import Taro from '@tarojs/taro'
 import BottomNav from '../../components/BottomNav.vue'
 // 获取接口信息
 import { getUserProfileAPI } from '@/api/user'
-import { getMapUrlAPI } from '@/api/map'
 
 /**
  * 活动页面WebView组件
@@ -131,18 +130,22 @@ const initPageData = async () => {
   try {
     console.log('=== WebView 初始化开始 ===')
 
-    // 获取地图URL
-    const mapUrlResponse = await getMapUrlAPI()
-    if (mapUrlResponse.code && mapUrlResponse.data?.url) {
-      baseUrl.value = mapUrlResponse.data.url
-      console.log('✅ 获取到的地图URL:', baseUrl.value)
+    // 从 URL 参数中获取地图 URL（由 ActivitiesDetail 页面传递）
+    const instance = Taro.getCurrentInstance()
+    const { mapUrl, current_lng, current_lat, discount_title, activityId } =
+      instance.router?.params || {}
+
+    // 解码地图 URL
+    if (mapUrl) {
+      baseUrl.value = decodeURIComponent(mapUrl)
+      console.log('✅ 从 URL 参数获取到的地图URL:', baseUrl.value)
     } else {
-      console.error('❌ 获取地图URL失败:', mapUrlResponse.msg)
-      // 显示错误提示，不使用默认URL
+      console.error('❌ 未接收到地图URL参数')
+      // 显示错误提示
       error.value = true
       loading.value = false
       Taro.showToast({
-        title: mapUrlResponse.msg || '获取地图信息失败',
+        title: '缺少地图信息',
         icon: 'none',
       })
       return
@@ -151,10 +154,6 @@ const initPageData = async () => {
     // 获取用户信息
     const { code, data } = await getUserProfileAPI()
     if (code) {
-      // 获取路由参数中的经纬度信息
-      const instance = Taro.getCurrentInstance()
-      const { current_lng, current_lat, discount_title, activityId } = instance.router?.params || {}
-
       console.log('✅ 接收到的位置参数:', { current_lng, current_lat, discount_title, activityId })
       // 处理用户信息
       const openid = data?.user.openid || ''

@@ -579,9 +579,9 @@ const handleJoinActivity = async () => {
       }
     }
 
-    // 跳转到Activities页面，并传递位置参数
+    // 跳转到Activities页面，并传递位置参数和地图 URL
     await Taro.navigateTo({
-      url: `/pages/Activities/index?current_lng=${userLocation.value.lng}&current_lat=${userLocation.value.lat}&discount_title=${activityData.value.discount_title}&activityId=${activityId.value}`,
+      url: `/pages/Activities/index?current_lng=${userLocation.value.lng}&current_lat=${userLocation.value.lat}&discount_title=${activityData.value.discount_title}&activityId=${activityId.value}&mapUrl=${encodeURIComponent(activityData.value.mapUrl)}`,
     })
   } catch (error) {
     console.error('参加活动失败:', error)
@@ -975,6 +975,7 @@ const transformApiDataToActivityData = apiData => {
     rewards: rewards,
     discount_title: apiData.discount_title || '打卡点专属优惠',
     activityId: apiData.id || '',
+    mapUrl: apiData.url || '', // 保留地图 URL
   }
 }