fix: discount issues

frontend/admin/src/pages/OrderPage.vue

@@ -47,7 +47,7 @@ const formatPrice = (price) => {
 };
 
 const getDiscountAmount = (price, discount) => {
-    return (price * discount / 100);
+    return (price * (100 - discount) / 100);
 };
 
 const getFinalPrice = (price, discount) => {
@@ -89,25 +89,6 @@ const onSearch = (event) => {
     }, 300);
 };
 
-const handleDelete = (order) => {
-    confirm.require({
-        message: `确定要删除订单 "${order.id}" 吗?`,
-        header: '确认删除',
-        icon: 'pi pi-exclamation-triangle',
-        acceptClass: 'p-button-danger',
-        accept: async () => {
-            try {
-                await orderService.deleteOrder(order.id);
-                toast.add({ severity: 'success', summary: '成功', detail: '订单已删除', life: 3000 });
-                fetchOrders();
-            } catch (error) {
-                console.error('Failed to delete order:', error);
-                toast.add({ severity: 'error', summary: '错误', detail: '删除订单失败', life: 3000 });
-            }
-        }
-    });
-};
-
 onMounted(() => {
     fetchOrders();
 });