fix issues

internal/competition/handler/grpc/competition.go

@@ -5,11 +5,13 @@ import (
 
 	"datarush/internal/competition/domain"
 	pb "datarush/pkg/api/competition"
+	"strings"
+
 	"github.com/google/uuid"
 	"google.golang.org/grpc/codes"
 	"google.golang.org/grpc/status"
+	"google.golang.org/protobuf/types/known/emptypb"
 	"google.golang.org/protobuf/types/known/timestamppb"
-	"strings"
 )
 
 // ICompetitionService defines the interface for business logic.
@@ -72,7 +74,7 @@ func (h *CompetitionHandler) EditCompetition(ctx context.Context, req *pb.Compet
 	return fromDomainCompetition(updatedComp), nil
 }
 
-func (h *CompetitionHandler) DeleteCompetition(ctx context.Context, req *pb.DeleteCompetitionRequest) (*pb.DeleteCompetitionResponse, error) {
+func (h *CompetitionHandler) DeleteCompetition(ctx context.Context, req *pb.DeleteCompetitionRequest) (*emptypb.Empty, error) {
 	id, err := uuid.Parse(req.GetCompetitionId())
 	if err != nil {
 		return nil, status.Errorf(codes.InvalidArgument, "invalid competition id format")
@@ -80,7 +82,7 @@ func (h *CompetitionHandler) DeleteCompetition(ctx context.Context, req *pb.Dele
 	if err := h.service.DeleteCompetition(ctx, id); err != nil {
 		return nil, status.Errorf(codes.Internal, "failed to delete competition: %v", err)
 	}
-	return &pb.DeleteCompetitionResponse{Success: true}, nil
+	return &emptypb.Empty{}, nil
 }
 
 func (h *CompetitionHandler) ListCompetitions(ctx context.Context, req *pb.ListCompetitionsRequest) (*pb.ListCompetitionsResponse, error) {
@@ -196,4 +198,4 @@ func toDomainCompetitionType(ct pb.CompetitionType) domain.CompetitionType {
 
 func fromDomainCompetitionType(ct domain.CompetitionType) pb.CompetitionType {
 	return pb.CompetitionType(pb.CompetitionType_value["COMPETITION_TYPE_"+string(ct)])
-}
+}