package usecase import ( "context" ) type Row struct { SortOrder int SearchTag string Angle string Hook string Text string ReferenceNotes string SourcePermalinks []string Rationale string } type MatrixSummary struct { ID string BrandID string Rows []Row GeneratedAt int64 CreateAt int64 UpdateAt int64 } type UpsertRequest struct { TenantID string OwnerUID string BrandID string Rows []Row GeneratedAt int64 } type UseCase interface { Get(ctx context.Context, tenantID, ownerUID, brandID string) (*MatrixSummary, error) Upsert(ctx context.Context, req UpsertRequest) (*MatrixSummary, error) }