feat: architectural improvements for Apps and System Configuration virtual folders in Files

programs/include/gui/desktop.hpp

@@ -24,6 +24,7 @@ static constexpr int MAX_LAUNCHER_ITEMS = 64;
 struct ExternalApp {
     char name[48];
     char binary_path[128];
+    char icon_path[128];
     char category[24];
     SvgIcon icon;
     bool menu_visible;
@@ -131,9 +132,9 @@ struct DesktopState {
     SvgIcon icon_home_folder_lg;
     SvgIcon icon_apps;
     SvgIcon icon_apps_lg;
-    SvgIcon icon_system_tools_menu;
-    SvgIcon icon_system_tools;
-    SvgIcon icon_system_tools_lg;
+    SvgIcon icon_system_configuration_menu;
+    SvgIcon icon_system_configuration;
+    SvgIcon icon_system_configuration_lg;
 
     // Special user folder icons (16x16 and 48x48)
     static constexpr int SPECIAL_FOLDER_COUNT = 6;