修复(#84): 补齐促销管理API实现文件

Co-authored-by: multica-agent <github@multica.ai>

internal/logic/admin/promo/getPromoUsageListLogic.go

@@ -0,0 +1,48 @@
+package promo
+
+import (
+	"context"
+
+	promoModel "github.com/perfect-panel/server/internal/model/promo"
+	"github.com/perfect-panel/server/internal/svc"
+	"github.com/perfect-panel/server/internal/types"
+	"github.com/perfect-panel/server/pkg/logger"
+)
+
+type GetPromoUsageListLogic struct {
+	logger.Logger
+	ctx    context.Context
+	svcCtx *svc.ServiceContext
+}
+
+// Get promo usage list
+func NewGetPromoUsageListLogic(ctx context.Context, svcCtx *svc.ServiceContext) *GetPromoUsageListLogic {
+	return &GetPromoUsageListLogic{
+		Logger: logger.WithContext(ctx),
+		ctx:    ctx,
+		svcCtx: svcCtx,
+	}
+}
+
+func (l *GetPromoUsageListLogic) GetPromoUsageList(req *types.GetPromoUsageListRequest) (*types.GetPromoUsageListResponse, error) {
+	total, list, err := l.svcCtx.PromoModel.QueryUsageList(l.ctx, promoModel.UsageFilter{
+		Page:        int(req.Page),
+		Size:        int(req.Size),
+		PromoRuleId: req.PromoRuleId,
+		UserId:      req.UserId,
+		SubscribeId: req.SubscribeId,
+		OrderNo:     req.OrderNo,
+	})
+	if err != nil {
+		l.Errorw("[GetPromoUsageList] Database Error", logger.Field("error", err.Error()))
+		return nil, wrapQueryError("get promo usage list failed", err)
+	}
+	resp := &types.GetPromoUsageListResponse{
+		Total: total,
+		List:  make([]types.PromoUsage, 0, len(list)),
+	}
+	for _, item := range list {
+		resp.List = append(resp.List, toUsageResponse(item))
+	}
+	return resp, nil
+}