```

fix(address): 修复地址管理中的经纬度验证和导航逻辑

- 添加 parseLngLatFromText 工具函数用于解析经纬度坐标
- 实现 hasValidLngLat 函数验证地址是否包含有效经纬度信息
- 在新增地址时检查默认地址是否缺少经纬度并引导用户完善定位
- 使用 hasValidLngLat 替换原有的经纬度验证逻辑
- 添加安全返回功能避免地址列表页导航异常
- 设置默认地址后自动返回上一页提升用户体验
```

src/user/address/add.tsx

@@ -9,6 +9,7 @@ import {ShopUserAddress} from "@/api/shop/shopUserAddress/model";
 import {getShopUserAddress, listShopUserAddress, updateShopUserAddress, addShopUserAddress} from "@/api/shop/shopUserAddress";
 import RegionData from '@/api/json/regions-data.json';
 import FixedButton from "@/components/FixedButton";
+import { parseLngLatFromText } from "@/utils/geofence";
 
 type SelectedLocation = { lng: string; lat: string; name?: string; address?: string }
 
@@ -28,6 +29,15 @@ const isUserCancel = (e: any) => {
   return msg.includes('cancel')
 }
 
+const hasValidLngLat = (addr?: Partial<ShopUserAddress> | null) => {
+  if (!addr) return false
+  const p = parseLngLatFromText(`${(addr as any)?.lng ?? ''},${(addr as any)?.lat ?? ''}`)
+  if (!p) return false
+  // Treat "0,0" as missing in this app (typically used as placeholder by backends).
+  if (p.lng === 0 && p.lat === 0) return false
+  return true
+}
+
 const AddUserAddress = () => {
   const {params} = useRouter();
   const [loading, setLoading] = useState<boolean>(true)
@@ -47,6 +57,31 @@ const AddUserAddress = () => {
     // 整理地区数据
     setRegionData()
 
+    // 新增模式：若存在“默认地址”但缺少经纬度，则强制引导到编辑页完善定位
+    // 目的：确保业务依赖默认地址坐标（选店/配送范围）时不会因为缺失坐标而失败
+    if (!isEditMode) {
+      try {
+        const defaultList = await listShopUserAddress({ isDefault: true })
+        const defaultAddr = defaultList?.[0]
+        if (defaultAddr && !hasValidLngLat(defaultAddr)) {
+          await Taro.showModal({
+            title: '需要完善定位',
+            content: '默认收货地址缺少定位信息，请先进入编辑页面选择定位并保存后再继续。',
+            confirmText: '去完善',
+            showCancel: false
+          })
+          if (defaultAddr.id) {
+            Taro.navigateTo({ url: `/user/address/add?id=${defaultAddr.id}` })
+          } else {
+            Taro.navigateTo({ url: '/user/address/index' })
+          }
+          return
+        }
+      } catch (_e) {
+        // ignore: 新增页不阻塞渲染
+      }
+    }
+
     // 如果是编辑模式，加载地址数据
     if (isEditMode && addressId) {
       try {
@@ -55,9 +90,7 @@ const AddUserAddress = () => {
         // 设置所在地区
         setText(`${address.province} ${address.city} ${address.region}`)
         // 回显已保存的经纬度（编辑模式）
-        if (address?.lng && address?.lat) {
+        if (hasValidLngLat(address)) setSelectedLocation({ lng: String(address.lng), lat: String(address.lat) })
-          setSelectedLocation({ lng: String(address.lng), lat: String(address.lat) })
-        }
       } catch (error) {
         console.error('加载地址失败:', error)
         Taro.showToast({
@@ -348,7 +381,7 @@ const AddUserAddress = () => {
   const submitSucceed = async (values: any) => {
     const loc =
       selectedLocation ||
-      (FormData?.lng && FormData?.lat ? { lng: String(FormData.lng), lat: String(FormData.lat) } : null)
+      (hasValidLngLat(FormData) ? { lng: String(FormData.lng), lat: String(FormData.lat) } : null)
     if (!loc) {
       Taro.showToast({ title: '请选择定位', icon: 'none' })
       return

src/user/address/index.tsx

@@ -13,6 +13,19 @@ const Address = () => {
   const [list, setList] = useState<ShopUserAddress[]>([])
   const [address, setAddress] = useState<ShopUserAddress>()
 
+  const safeNavigateBack = async () => {
+    try {
+      const pages = (Taro as any).getCurrentPages?.() || []
+      if (Array.isArray(pages) && pages.length > 1) {
+        await Taro.navigateBack()
+        return true
+      }
+    } catch (_e) {
+      // ignore
+    }
+    return false
+  }
+
   const parseTime = (raw?: unknown) => {
     if (raw === undefined || raw === null || raw === '') return null;
     // 兼容秒/毫秒时间戳
@@ -78,7 +91,11 @@ const Address = () => {
       title: '设置成功',
       icon: 'success'
     });
-    reload();
+    // 设置默认地址通常是“选择地址”的动作：成功后返回上一页，体验更顺滑
+    setTimeout(async () => {
+      const backed = await safeNavigateBack()
+      if (!backed) reload()
+    }, 400)
   }
 
   const onDel = async (id?: number) => {