feat: desktop - use MTK menu for desktop right-click menu

programs/include/gui/desktop.hpp

@@ -10,6 +10,7 @@
 #include "gui/svg.hpp"
 #include "gui/window.hpp"
 #include "gui/widgets.hpp"
+#include "gui/mtk/widgets.hpp"
 #include "gui/terminal.hpp"
 #include <Api/Syscall.hpp>
 
@@ -172,8 +173,8 @@ struct DesktopState {
     int desktop_item_count;
     int desktop_item_capacity;
 
-    bool ctx_menu_open;
-    int ctx_menu_x, ctx_menu_y;
+    // Right-click menu on the desktop background (MTK context menu).
+    mtk::ContextMenuState ctx_menu;
 
     bool net_popup_open;
     montauk::abi::NetCfg cached_net_cfg;