♻️ refactor(order): optimize layout and API parameters

- 修改订单详情页ScrollView样式，使用flex-1替代h-screen并调整内边距
- 修改订单列表页ScrollView样式，使用flex-1替代h-screen
- 优化订单列表API请求参数，将order字段改为sortOrder: 'DESC'

mini/src/pages/order-detail/index.tsx

@@ -64,7 +64,7 @@ export default function OrderDetailPage() {
         onClickLeft={() => Taro.navigateBack()}
       />
       
-      <ScrollView className="h-screen pt-12 pb-20">
+      <ScrollView className="flex-1 pt-4 pb-20">
         <View className="px-4 space-y-4">
           {/* 订单状态 */}
           <Card>

mini/src/pages/order-list/index.tsx

@@ -68,7 +68,7 @@ export default function OrderListPage() {
           page: pageParam,
           pageSize: 10,
           filters: JSON.stringify(filters),
-          order: JSON.stringify({ createdAt: 'DESC' })
+          sortOrder: 'DESC'
         }
       })
       if (response.status !== 200) {
@@ -142,7 +142,7 @@ export default function OrderListPage() {
       />
       
       <ScrollView
-        className="h-screen pt-12"
+        className="flex-1"
         scrollY
         onScrollToLower={handleScrollToLower}
         refresherEnabled