refactor: 统一状态名称映射为公共函数，清理废弃换卡/商户类型常量和模型

internal/service/shop_commission/service.go

@@ -328,7 +328,7 @@ func (s *Service) buildWithdrawalRequestItem(r *model.CommissionWithdrawalReques
 		Fee:              r.Fee,
 		ActualAmount:     r.ActualAmount,
 		Status:           r.Status,
-		StatusName:       getWithdrawalStatusName(r.Status),
+		StatusName:       constants.GetWithdrawalStatusName(r.Status),
 		ShopID:           r.ShopID,
 		ShopName:         shopName,
 		ShopHierarchy:    shopHierarchy,
@@ -443,7 +443,7 @@ func (s *Service) ListShopCommissionRecords(ctx context.Context, shopID uint, re
 			BalanceAfter:     r.BalanceAfter,
 			CommissionSource: r.CommissionSource,
 			Status:           r.Status,
-			StatusName:       getCommissionStatusName(r.Status),
+			StatusName:       constants.GetCommissionRecordStatusName(r.Status),
 			OrderID:          r.OrderID,
 			OrderNo:          r.OrderNo,
 			VirtualNo:        r.VirtualNo,
@@ -672,7 +672,7 @@ func (s *Service) CreateWithdrawalRequest(ctx context.Context, shopID uint, req
 		Fee:          withdrawalRequest.Fee,
 		ActualAmount: withdrawalRequest.ActualAmount,
 		Status:       withdrawalRequest.Status,
-		StatusName:   getWithdrawalStatusName(withdrawalRequest.Status),
+		StatusName:   constants.GetWithdrawalStatusName(withdrawalRequest.Status),
 		CreatedAt:    withdrawalRequest.CreatedAt.Format("2006-01-02 15:04:05"),
 	}, nil
 }
@@ -823,38 +823,6 @@ func (s *Service) ResolveCommissionRecord(ctx context.Context, recordID uint, re
 	})
 }
 
-// getWithdrawalStatusName 获取提现状态名称
-func getWithdrawalStatusName(status int) string {
-	switch status {
-	case constants.WithdrawalStatusPending:
-		return "待审核"
-	case constants.WithdrawalStatusApproved:
-		return "已通过"
-	case constants.WithdrawalStatusRejected:
-		return "已拒绝"
-	case constants.WithdrawalStatusPaid:
-		return "已到账"
-	default:
-		return "未知"
-	}
-}
-
-// getCommissionStatusName 获取佣金状态名称
-func getCommissionStatusName(status int) string {
-	switch status {
-	case constants.CommissionStatusFrozen:
-		return "已冻结"
-	case constants.CommissionStatusUnfreezing:
-		return "解冻中"
-	case constants.CommissionStatusReleased:
-		return "已发放"
-	case constants.CommissionStatusInvalid:
-		return "已失效"
-	default:
-		return "未知"
-	}
-}
-
 // generateWithdrawalNo 生成提现单号
 func generateWithdrawalNo() string {
 	now := time.Now()