fix(home): 导航栏城市优先展示 LBS 定位

- nearbyText 改为先取 location 市/省，再退回收货地址城市，避免默认北京盖住当前定位
- home-header 去掉硬编码昌平默认文案，改为详细地址或省市区拼接

Made-with: Cursor

src/pages/custom/custom-page.js

@@ -43,7 +43,8 @@ function CustomPage(props) {
   const loginRef = useRef()
   const router = useRouter()
   const { location, address } = useSelector((state) => state.user)
-  const nearbyText = address?.city || location?.city || ''
+  const nearbyText =
+    location?.city || location?.province || address?.city || ''
 
   useEffect(() => {
     fetch()

src/pages/home/wgts/home-header.js

@@ -46,7 +46,11 @@ function WgtHomeHeader(props) {
             }
           }}
         >
-          <View className='address'>{location?.address || '北京市北京市昌平区'}</View>
+          <View className='address'>
+            {location?.address ||
+              [location?.province, location?.city, location?.district].filter(Boolean).join('') ||
+              '选择地区'}
+          </View>
           <Text className='iconfont icon-qianwang-01'></Text>
         </View>
       )}

src/pages/index.js

@@ -90,7 +90,9 @@ function Home() {
 
   const showAdv = useSelector((member) => member.user.showAdv)
   const { location, address } = useSelector((state) => state.user)
-  const nearbyText = address?.city || location?.city || ''
+  /** 导航栏城市：优先跟随 LBS 定位，与「选择商家」页一致；勿用收货地址盖住当前定位 */
+  const nearbyText =
+    location?.city || location?.province || address?.city || ''
   const { setNavigationBarTitle } = useNavigation()
   const { updateAddress } = useLocation()
   const locationKeyRef = useRef('')