fix: include platform_fee in OrderResponse

controllers/order_controller.go

@@ -44,6 +44,7 @@ type OrderResponse struct {
 	BranchID        *uint               `json:"branch_id"`
 	BranchName      string              `json:"branch_name"`
 	TotalAmount     int                 `json:"total_amount"`
+	PlatformFee     int                 `json:"platform_fee"`
 	PaidAmount      int                 `json:"paid_amount"`
 	ChangeAmount    int                 `json:"change_amount"`
 	PaymentMethod   string              `json:"payment_method"`
@@ -119,6 +120,7 @@ func toOrderResponse(order *models.Order) OrderResponse {
 		BranchID:        order.BranchID,
 		BranchName:      bName,
 		TotalAmount:     order.TotalAmount,
+		PlatformFee:     order.PlatformFee,
 		PaidAmount:      order.PaidAmount,
 		ChangeAmount:    order.ChangeAmount,
 		PaymentMethod:   order.PaymentMethod,