fix issue

templates/repo/header.tmpl

@@ -138,7 +138,7 @@
 				</a>
 				{{end}}
 				{{if .Permission.CanRead $.UnitTypeDatasets}}
-				<a class="{{if .PageIsDataset}}active{{end}} item" href="{{.RepoLink}}/modelmanage/show_model">
+				<a class="{{if .isModelManage}}active{{end}} item" href="{{.RepoLink}}/modelmanage/show_model">
 					<svg class="svg" xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24" width="16" height="16"><path fill="none" d="M0 0h24v24H0z"/><path d="M3.741 1.408l18.462 10.154a.5.5 0 0 1 0 .876L3.741 22.592A.5.5 0 0 1 3 22.154V1.846a.5.5 0 0 1 .741-.438zM5 13v6.617L18.85 12 5 4.383V11h5v2H5z"/></svg>
 					{{.i18n.Tr "repo.model_manager"}}
 				</a>