Fix assignee sidebar links and empty placeholder after #32465 refactor (#36559)

Follow-up to #32465: Fix the assignee sidebar after the selector
refactor.


Co-authored-by: wxiaoguang <wxiaoguang@gmail.com>

templates/repo/issue/sidebar/assignee_list.tmpl

@@ -1,5 +1,7 @@
 {{$pageMeta := .}}
 {{$data := .AssigneesData}}
+{{$listBaseLink := print $pageMeta.RepoLink (Iif $pageMeta.IsPullRequest "/pulls" "/issues")}}
+{{/* TODO: it seems that the code keeps checking $pageMeta.Issue and assumes that it might not exist, need to figure out why */}}
 {{$issueAssignees := NIL}}{{if $pageMeta.Issue}}{{$issueAssignees = $pageMeta.Issue.Assignees}}{{end}}
 <div class="divider"></div>
 <div class="issue-sidebar-combo" data-selection-mode="multiple" data-update-algo="diff"
@@ -19,7 +21,7 @@
 				<div class="item clear-selection" data-text="">{{ctx.Locale.Tr "repo.issues.new.clear_assignees"}}</div>
 				<div class="divider"></div>
 				{{range $data.CandidateAssignees}}
-					<a class="item" href="#" data-value="{{.ID}}">
+					<a class="item" href="{{$listBaseLink}}?assignee={{.ID}}" data-value="{{.ID}}">
 						<span class="item-check-mark">{{svg "octicon-check"}}</span>
 						{{ctx.AvatarUtils.Avatar . 20}} {{template "repo/search_name" .}}
 					</a>
@@ -30,8 +32,8 @@
 	<div class="ui relaxed list muted-links flex-items-block">
 		<span class="item empty-list {{if $issueAssignees}}tw-hidden{{end}}">{{ctx.Locale.Tr "repo.issues.new.no_assignees"}}</span>
 		{{range $issueAssignees}}
-			<a class="item" href="{{$pageMeta.RepoLink}}/{{if $pageMeta.IsPullRequest}}pulls{{else}}issues{{end}}?assignee={{.ID}}">
-					{{ctx.AvatarUtils.Avatar . 20}} {{.GetDisplayName}}
+			<a class="item" href="{{$listBaseLink}}?assignee={{.ID}}">
+				{{ctx.AvatarUtils.Avatar . 20}} {{.GetDisplayName}}
 			</a>
 		{{end}}
 	</div>