fix(submit): keep sidebar visible on front submit page

inc/helpers/template-tags/site-layout.php

@@ -151,8 +151,14 @@ function aksrt_is_show_sidebar_filter(): bool {
         return false;
     }
 
+    // The submit page owns functional sidebar controls even without assigned
+    // widgets, so its column must remain available when the sidebar is enabled.
+    if (is_page_template('templates/pages/page-submit.php')) {
+        return true;
+    }
+
     // An empty widget stack would leave the reserved column as a bare gutter,
-    // so every scene (not only singles) collapses to no-sidebar.
+    // so every other scene collapses to no-sidebar.
     if (!aksrt_has_current_sidebar_widgets()) {
         return false;
     }