feat(map): 添加地图定位功能的条件渲染控制

为了解决H5平台地图定位显示的问题，在index页面和pick-location页面中添加了
mapShowLocation响应式变量，并通过条件编译确保仅在非H5平台启用地图定位功能，
避免H5环境下出现定位相关的兼容性问题。

clients/pages/index/index.vue

@@ -48,6 +48,11 @@ const selectedSpot = ref(null);
 const locating = ref(false);
 const mapCtx = ref(null);
 const userLocation = ref(null);
+const mapShowLocation = ref(false);
+
+// #ifndef H5
+mapShowLocation.value = true;
+// #endif
 
 const truncate = (str, len = 8) =>
   str && str.length > len ? str.slice(0, len) + "…" : str;
@@ -390,7 +395,7 @@ onMounted(() => {
       :longitude="mapCenter.longitude"
       :markers="markers"
       :scale="12"
-      :show-location="true"
+      :show-location="mapShowLocation"
       :enable-zoom="true"
       :enable-scroll="true"
       @markertap="onMarkerTap"

clients/pages/spot/pick-location.vue

@@ -7,6 +7,11 @@ const longitude = ref(116.39747);
 const address = ref("移动地图选择位置");
 const currentCity = ref("");
 const mapCtx = ref(null);
+const mapShowLocation = ref(false);
+
+// #ifndef H5
+mapShowLocation.value = true;
+// #endif
 
 const keyword = ref("");
 const searchResults = ref([]);
@@ -129,7 +134,7 @@ const confirmLocation = () => {
       :latitude="latitude"
       :longitude="longitude"
       :scale="16"
-      show-location
+      :show-location="mapShowLocation"
       @regionchange="onRegionChange"
     />
     <view class="center-pin">