--- a/ui/common/args.c	Mon Oct 06 12:52:05 2025 +0200
+++ b/ui/common/args.c	Mon Oct 06 13:01:39 2025 +0200
@@ -619,6 +619,10 @@
     args->style_class = strdup(classname);
 }
 
+void ui_frame_args_set_subcontainer(UiFrameArgs *args, UiSubContainerType subcontainer) {
+    args->subcontainer = subcontainer;
+}
+
 void ui_frame_args_set_padding(UiFrameArgs *args, int value) {
     args->padding = value;
 }