fix: block Steam Deck earlier

dzgui.sh

@@ -1734,6 +1734,11 @@ check_architecture(){
 	if [[ -n "$cpu" ]]; then
 		is_steam_deck=1
 		logger INFO "Setting architecture to 'Steam Deck'"
+        [[ $is_steam_deck -eq 1 ]] && test_display_mode
+        if [[ $gamemode -eq 1 ]]; then
+            popup 1400
+            return 1
+        fi
 	else
 		is_steam_deck=0
 		logger INFO "Setting architecture to 'desktop'"