Refactor label.IsArchived() (#29750)

just some missed nits

models/issues/label.go

 func (l *Label) SetArchived(isArchived bool) {
 	if !isArchived {
 		l.ArchivedUnix = timeutil.TimeStamp(0)
-	} else if isArchived && l.ArchivedUnix.IsZero() {
+	} else if isArchived && !l.IsArchived() {
 		// Only change the date when it is newly archived.
 		l.ArchivedUnix = timeutil.TimeStampNow()
 	}
 }
 
+// IsArchived returns true if label is an archived
+func (l *Label) IsArchived() bool {
+	return !l.ArchivedUnix.IsZero()
+}
+
 // CalOpenOrgIssues calculates the open issues of a label for a specific repo
 func (l *Label) CalOpenOrgIssues(ctx context.Context, repoID, labelID int64) {
 	counts, _ := CountIssuesByRepo(ctx, &IssuesOptions{
 	return l.OrgID > 0
 }
 
-// IsArchived returns true if label is an archived
-func (l *Label) IsArchived() bool {
-	return l.ArchivedUnix > 0
-}
-
 // BelongsToRepo returns true if label is a repository label
 func (l *Label) BelongsToRepo() bool {
 	return l.RepoID > 0

modules/templates/util_render.go

 	var (
 		archivedCSSClass string
 		textColor        = "#111"
-		isArchived       = !label.ArchivedUnix.IsZero()
 		labelScope       = label.ExclusiveScope()
 	)
 
 
 	description := emoji.ReplaceAliases(template.HTMLEscapeString(label.Description))
 
-	if isArchived {
+	if label.IsArchived() {
 		archivedCSSClass = "archived-label"
 		description = fmt.Sprintf("(%s) %s", locale.TrString("archived"), description)
 	}

routers/web/repo/issue_label.go

 	"code.gitea.io/gitea/modules/label"
 	"code.gitea.io/gitea/modules/log"
 	repo_module "code.gitea.io/gitea/modules/repository"
-	"code.gitea.io/gitea/modules/timeutil"
 	"code.gitea.io/gitea/modules/web"
 	"code.gitea.io/gitea/services/context"
 	"code.gitea.io/gitea/services/forms"
 	}
 
 	l := &issues_model.Label{
-		RepoID:       ctx.Repo.Repository.ID,
-		Name:         form.Title,
-		Exclusive:    form.Exclusive,
-		Description:  form.Description,
-		Color:        form.Color,
-		ArchivedUnix: timeutil.TimeStamp(0),
+		RepoID:      ctx.Repo.Repository.ID,
+		Name:        form.Title,
+		Exclusive:   form.Exclusive,
+		Description: form.Description,
+		Color:       form.Color,
 	}
 	if err := issues_model.NewLabel(ctx, l); err != nil {
 		ctx.ServerError("NewLabel", err)