add graphics settings save

core/game_menu/window_option_menu.gd

@@ -6,6 +6,7 @@ signal resolution_changed(resolution: Vector2i)
 @export var window_option_menu_button_scene: PackedScene
 
 var current_mode_index: int = 0
+var current_resolution: Vector2i = Vector2i.ZERO
 
 var available_resolutions: Array[Vector2i] = [
 	Vector2i(1280, 720),
@@ -37,6 +38,11 @@ func _ready() -> void:
 	_populate_resolutions()
 	_update_ui()
 
+func initialize(mode_index: int, res: Vector2i) -> void:
+	current_mode_index = mode_index
+	current_resolution = res
+	_update_ui()
+
 func _populate_resolutions() -> void:
 	var screen_size = DisplayServer.screen_get_size()
 	
@@ -63,6 +69,7 @@ func _on_resolution_selected(res: Vector2i, btn) -> void:
 		button.deselect()
 	
 	btn.select()
+	current_resolution = res
 	resolution_changed.emit(res)
 
 func _on_left_arrow_pressed() -> void:
@@ -95,7 +102,16 @@ func _update_ui() -> void:
 		else:
 			button.disable()
 
-	var btn = res_buttons[0]
-	btn.select()
-	if show_res:
-		resolution_changed.emit(available_resolutions[0])
+	if res_buttons.size() > 0:
+		var target_index = 0
+		for idx in range(_valid_resolutions.size()):
+			if _valid_resolutions[idx] == current_resolution:
+				target_index = idx
+				break
+		
+		var btn = res_buttons[target_index]
+		btn.select()
+		current_resolution = _valid_resolutions[target_index]
+		
+		if show_res:
+			resolution_changed.emit(current_resolution)