fix(layout): restore sidebar after viewport switch

inc/helpers/aksrt-template-tags.php

@@ -140,9 +140,9 @@ if (!function_exists('aksrt_is_show_sidebar_filter')):
  * Core sidebar visibility decision (Zibll zib_is_show_sidebar_filter parity).
  */
 function aksrt_is_show_sidebar_filter(): bool {
-    if (function_exists('wp_is_mobile') && wp_is_mobile()) {
-        return false;
-    }
+    // Keep the sidebar in the document for every request. wp_is_mobile() is
+    // User-Agent based, so it cannot track a browser viewport changing after
+    // the response is rendered. Responsive CSS controls narrow-screen hiding.
 
     $cfg = aksrt_get_sidebar_config_safe();
     if (empty($cfg['enabled'])) {

sidebar.php

@@ -11,10 +11,6 @@
 
 defined('ABSPATH') || exit;
 
-if (wp_is_mobile()) {
-	return;
-}
-
 $sidebar_id = function_exists('aksrt_resolve_sidebar_id')
 	? aksrt_resolve_sidebar_id()
 	: 'home_sidebar';