新增退款待审核角标提醒

backend/internal/modules/order/refund_review.go

@@ -2,6 +2,8 @@ package order
 
 import (
 	"context"
+
+	"hfb_sys/backend/internal/model"
 )
 
 // ListPendingRefund 查询所有待客服审核退款的订单。
@@ -26,3 +28,13 @@ func (r *Repository) ListPendingRefund(ctx context.Context) ([]OrderDTO, error)
 	}
 	return items, nil
 }
+
+// PendingRefundCount 返回待客服审核退款数量，用于后台导航角标。
+func (r *Repository) PendingRefundCount(ctx context.Context) (int64, error) {
+	var count int64
+	err := r.db.WithContext(ctx).
+		Model(&model.RentalOrder{}).
+		Where("refund_status = ?", refundStatusPendingReview).
+		Count(&count).Error
+	return count, err
+}