gitea/templates/admin/base/search.tmpl

<div class="ui right floated secondary filter menu">
<!-- Sort -->
	<div class="ui dropdown type jump item">
		<span class="text">
			{{.i18n.Tr "repo.issues.filter_sort"}}
			<i class="dropdown icon"></i>
		</span>
		<div class="menu">
			<a class="{{if or (eq .SortType "oldest") (not .SortType)}}active{{end}} item" href="{{$.Link}}?sort=oldest&q={{$.Keyword}}">{{.i18n.Tr "repo.issues.filter_sort.latest"}}</a>
			<a class="{{if eq .SortType "newest"}}active{{end}} item" href="{{$.Link}}?sort=newest&q={{$.Keyword}}">{{.i18n.Tr "repo.issues.filter_sort.oldest"}}</a>
			<a class="{{if eq .SortType "alphabetically"}}active{{end}} item" href="{{$.Link}}?sort=alphabetically&q={{$.Keyword}}">{{.i18n.Tr "repo.issues.label.filter_sort.alphabetically"}}</a>
			<a class="{{if eq .SortType "reversealphabetically"}}active{{end}} item" href="{{$.Link}}?sort=reversealphabetically&q={{$.Keyword}}">{{.i18n.Tr "repo.issues.label.filter_sort.reverse_alphabetically"}}</a>
			<a class="{{if eq .SortType "recentupdate"}}active{{end}} item" href="{{$.Link}}?sort=recentupdate&q={{$.Keyword}}">{{.i18n.Tr "repo.issues.filter_sort.recentupdate"}}</a>
			<a class="{{if eq .SortType "leastupdate"}}active{{end}} item" href="{{$.Link}}?sort=leastupdate&q={{$.Keyword}}">{{.i18n.Tr "repo.issues.filter_sort.leastupdate"}}</a>
			<a class="{{if eq .SortType "size"}}active{{end}} item" href="{{$.Link}}?sort=size&q={{$.Keyword}}">{{.i18n.Tr "repo.issues.label.filter_sort.by_size"}}</a>
			<a class="{{if eq .SortType "reversesize"}}active{{end}} item" href="{{$.Link}}?sort=reversesize&q={{$.Keyword}}">{{.i18n.Tr "repo.issues.label.filter_sort.reverse_by_size"}}</a>
		</div>
	</div>
</div>
<form class="ui form"  style="max-width: 90%">
	<div class="ui fluid action input">
	  <input name="q" value="{{.Keyword}}" placeholder="{{.i18n.Tr "explore.search"}}..." autofocus>
	  <button class="ui blue button">{{.i18n.Tr "explore.search"}}</button>
	</div>
</form>