Fix invisible box on rotated multi-tile airlocks (#77736)

## About The Pull Request

Fixes airlock bounding box being incorrect when rotated leading to a
solid, invisible box on the adjacent tile. Icon states match airlock
direction.

## Changelog

🆑 LT3
fix: Rotated multi-tile airlocks display correctly and won't create an
invisible box next to itself
/🆑

code/__HELPERS/icons.dm

@@ -1505,3 +1505,18 @@ GLOBAL_LIST_EMPTY(transformation_animation_objects)
 	var/size = size_check.Width() / world.icon_size
 
 	return size
+
+/**
+ * Updates the bounds of a rotated object
+ * This ensures that the bounds are always correct,
+ * even if the object is rotated after init.
+ */
+/obj/proc/set_bounds()
+	var/size = get_size_in_tiles(src)
+
+	if(dir in list(NORTH, SOUTH))
+		bound_width = size * world.icon_size
+		bound_height = world.icon_size
+	else
+		bound_width = world.icon_size
+		bound_height = size * world.icon_size

code/game/machinery/doors/airlock.dm

@@ -2391,7 +2391,6 @@
 	multi_tile = TRUE
 	opacity = FALSE
 	glass = TRUE
-	bound_width = 64 // 2x1
 
 /obj/structure/fluff/airlock_filler
 	name = "airlock fluff"

code/game/machinery/doors/door.dm

@@ -70,8 +70,8 @@
 	AddElement(/datum/element/blocks_explosives)
 	. = ..()
 	set_init_door_layer()
-	if(bound_width > world.icon_size)
-		multi_tile = TRUE
+	if(multi_tile)
+		set_bounds()
 		set_filler()
 		update_overlays()
 	update_freelook_sight()

code/game/objects/structures/door_assembly.dm

@@ -393,18 +393,3 @@
 			qdel(src)
 			return TRUE
 	return FALSE
-
-/**
- * Updates the bounds of the airlock assembly
- * Sets the bounds of the airlock assembly according to the direction.
- * This ensures that the bounds are always correct, even if the airlock is rotated.
- */
-/obj/structure/door_assembly/multi_tile/proc/set_bounds()
-	var/size = get_size_in_tiles(src)
-
-	if(dir in list(NORTH, SOUTH))
-		bound_width = size * world.icon_size
-		bound_height = world.icon_size
-	else
-		bound_width = world.icon_size
-		bound_height = size * world.icon_size