update and improve ui

core/photo_mode/runtime/photo_mode_controller.gd

@@ -121,6 +121,7 @@ func take_photo_async() -> void:
 	var targets = get_tree().get_nodes_in_group("collectible")
 	var space_state = get_world_3d().direct_space_state
 	
+	CollectionManager.on_photo_preview_ready.emit(captured_image)
 	CollectionManager.save_photo_to_disk_async(captured_image)
 	
 	for target in targets:
@@ -138,6 +139,10 @@ func take_photo_async() -> void:
 				CollectionManager.unlock_collectible(target.collectible_data.id)
 	
 	GameState.save_game()
+	
+	var shutter_stay_duration = 0.15
+	await get_tree().create_timer(shutter_stay_duration).timeout
+	
 	GameState.on_photo_taken_finished.emit()
 
 func _on_photo_mode_black_screen_disappeared() -> void: