Implement playable Mac client and rendering validation

project/ui/ui_assets.gd

@@ -8,7 +8,6 @@
 extends RefCounted
 
 static var _cache := {}
-static var _dds_helper: Object = null
 
 # DDS 运行时解码：走 Metin2World.load_dds（C++ 里的 dxt.cpp，DXT1/3/5 + BGRA8）。
 # Godot 无原生运行时 DDS 解码，UI 里的 select.dds / 职业名图都得走这条路。
@@ -17,9 +16,12 @@ static func load_dds_image(path: String) -> Image:
 		return null
 	if not ClassDB.class_exists("Metin2World"):
 		return null
-	if _dds_helper == null or not is_instance_valid(_dds_helper):
-		_dds_helper = ClassDB.instantiate("Metin2World")
-	var img = _dds_helper.call("load_dds", path)
+	# Metin2World is a Node, not RefCounted; a static reference never frees it.
+	# The decoder returns an independently owned Image, so release the helper
+	# after each decode (textures themselves remain cached by load_tex).
+	var helper: Object = ClassDB.instantiate("Metin2World")
+	var img = helper.call("load_dds", path)
+	helper.free()
 	return img if img is Image else null
 
 static func load_tex(assets_root: String, vpath: String) -> Texture2D: