fix: restore show_overlay and hide_overlay bodies (edit merged them)

inventory/inventory_overlay/InventoryOverlay.gd

@@ -34,9 +34,6 @@ func _ready() -> void:
 
 func show_overlay() -> void:
 	print("[OVERLAY] show_overlay called, inventory has %d items" % InventoryManager.inventory.size())
-
-func hide_overlay() -> void:
-	print("[OVERLAY] hide_overlay called")
 	_refresh_grid()
 	if _fade_tween:
 		_fade_tween.kill()
@@ -53,6 +50,7 @@ func hide_overlay() -> void:
 	tween.tween_callback(_on_fade_in_complete)
 
 func hide_overlay() -> void:
+	print("[OVERLAY] hide_overlay called")
 	if _fade_tween:
 		_fade_tween.kill()
 		_fade_tween = null