fix: Re-add least recently updated as sort order

Regression from https://codeberg.org/forgejo/forgejo/pulls/5819
Integration test added (my first! 🎉)

templates/repo/issue/filter_list.tmpl

@@ -148,7 +148,7 @@
 	<div class="menu">
 		<a rel="nofollow" class="{{if or (eq .SortType "relevance") (not .SortType)}}active {{end}}item" href="?q={{$.Keyword}}&type={{$.ViewType}}&sort=relevency&state={{$.State}}&labels={{.SelectLabels}}&milestone={{$.MilestoneID}}&project={{$.ProjectID}}&assignee={{$.AssigneeID}}&poster={{$.PosterID}}&fuzzy={{$.IsFuzzy}}{{if $.ShowArchivedLabels}}&archived=true{{end}}">{{ctx.Locale.Tr "repo.issues.filter_sort.relevance"}}</a>
 		{{$o := .}}
-		{{range $opt := StringUtils.Make "latest" "oldest" "recentupdate" "mostcomment" "leastcomment" "nearduedate" "farduedate"}}
+		{{range $opt := StringUtils.Make "latest" "oldest" "recentupdate" "leastupdate" "mostcomment" "leastcomment" "nearduedate" "farduedate"}}
 			{{$text := ctx.Locale.Tr (printf "repo.issues.filter_sort.%s" $opt)}}
 			<a rel="nofollow" class="{{if eq $o.SortType $opt}}active {{end}}item" href="?q={{$.Keyword}}&type={{$.ViewType}}&sort={{$opt}}&state={{$.State}}&labels={{$o.SelectLabels}}&milestone={{$.MilestoneID}}&project={{$.ProjectID}}&assignee={{$.AssigneeID}}&poster={{$.PosterID}}&fuzzy={{$.IsFuzzy}}{{if $.ShowArchivedLabels}}&archived=true{{end}}">{{$text}}</a>
 		{{end}}

tests/integration/repo_test.go

@@ -1048,6 +1048,42 @@ func TestFileHistoryPager(t *testing.T) {
 	})
 }
 
+func TestRepoIssueSorting(t *testing.T) {
+	defer tests.PrepareTestEnv(t)()
+
+	t.Run("Dropdown content", func(t *testing.T) {
+		defer tests.PrintCurrentTest(t)()
+
+		req := NewRequest(t, "GET", "/user2/repo1/issues")
+		resp := MakeRequest(t, req, http.StatusOK)
+		htmlDoc := NewHTMLParser(t, resp.Body)
+
+		assert.Equal(t,
+			9,
+			htmlDoc.Find(`.list-header-sort .menu a`).Length(),
+			"Wrong amount of sort options in dropdown")
+
+		menuItemsHTML := htmlDoc.Find(`.list-header-sort .menu`).Text()
+		locale := translation.NewLocale("en-US")
+		for _, key := range []string{
+			"relevance",
+			"latest",
+			"oldest",
+			"recentupdate",
+			"leastupdate",
+			"mostcomment",
+			"leastcomment",
+			"nearduedate",
+			"farduedate",
+		} {
+			assert.Contains(t,
+				menuItemsHTML,
+				locale.Tr("repo.issues.filter_sort."+key),
+				"Sort option %s ('%s') not found in dropdown", key, locale.Tr("repo.issues.filter_sort."+key))
+		}
+	})
+}
+
 func TestRepoIssueFilterLinks(t *testing.T) {
 	defer tests.PrepareTestEnv(t)()