Update tab title when navigating file tree (#35757)

Fix #35749.

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Signed-off-by: silverwind <me@silverwind.io>
Co-authored-by: wxiaoguang <wxiaoguang@gmail.com>
Co-authored-by: silverwind <me@silverwind.io>

templates/base/head.tmpl

@@ -2,7 +2,7 @@
 <html lang="{{ctx.Locale.Lang}}" data-theme="{{ctx.CurrentWebTheme.InternalName}}">
 <head>
 	<meta name="viewport" content="width=device-width, initial-scale=1">
-	<title>{{if .Title}}{{.Title}} - {{end}}{{if .Repository.Name}}{{.Repository.Name}} - {{end}}{{AppName}}</title>
+	<title>{{if .Title}}{{.Title}} - {{end}}{{.PageTitleCommon}}</title>
 	{{if .ManifestData}}<link rel="manifest" href="data:{{.ManifestData}}">{{end}}
 	<meta name="author" content="{{if .Repository}}{{.Owner.Name}}{{else}}{{MetaAuthor}}{{end}}">
 	<meta name="description" content="{{if .Repository}}{{.Repository.Name}}{{if .Repository.Description}} - {{.Repository.Description}}{{end}}{{else}}{{MetaDescription}}{{end}}">