fix: use absLangURL for menu url

To avoid problem when the site is hosted in subdirectory

exampleSite/config.toml

@@ -64,13 +64,13 @@ DefaultContentLanguage = "en"                   # Theme i18n support
     [[menu.main]]
         identifier = "about-cn"
         name = "About"
-        url = "/about/"
+        url = "about"
         weight = -90
         pre = "user"
     [[menu.main]]
         identifier = "archives"
         name = "Archives"
-        url = "/archives/"
+        url = "archives"
         weight = -70
         pre = "archives"
 

layouts/partials/sidebar/left.html

@@ -31,7 +31,7 @@
         {{ $active := or (eq $currentPage.Title .Name) (or ($currentPage.HasMenuCurrent "main" .) ($currentPage.IsMenuCurrent "main" .)) }}
 
         <li {{ if $active }} class='current' {{ end }}>
-            <a href='{{ .URL }}'>
+            <a href='{{ .URL | absLangURL }}'>
                 {{ if .Pre }}
                     {{ (resources.Get (delimit (slice "icons/" .Pre ".svg") "")).Content | safeHTML }}
                 {{ end }}