refactor(debug-mod): 使用原生 System 替换 QuMod

删除未使用的大型 QuMod 加载框架，改为直接注册客户端和服务端 System，并显式管理按键监听、输出包装与双端销毁。

IPC 网络线程仅负责收包，所有 ModAPI 回调由游戏线程 Update 派发，同时补充断线重连、分帧读取和幂等关闭。

debug_mod/DEBUG_ENV_SCRIPT/DebugClientSystem.py

@@ -0,0 +1,77 @@
+# -*- coding: utf-8 -*-
+import mod.client.extraClientApi as clientApi
+
+from . import IPCSystem, Lifecycle
+from .Config import DEBUG_CONFIG
+from .Game import (
+    INIT_RELOAD_TIME,
+    RELOAD_ADDON,
+    RELOAD_MOD,
+    RELOAD_SHADERS,
+    RELOAD_WORLD,
+)
+
+
+ClientSystem = clientApi.GetClientSystemCls()
+ENGINE_NAMESPACE = clientApi.GetEngineNamespace()
+ENGINE_SYSTEM_NAME = clientApi.GetEngineSystemName()
+
+
+class DebugClientSystem(ClientSystem):
+    def __init__(self, namespace, system_name):
+        ClientSystem.__init__(self, namespace, system_name)
+        self._initialized = False
+        self._listening = False
+
+    def Update(self):
+        if not self._initialized:
+            Lifecycle.activate(self)
+            IPCSystem.ON_CLIENT_INIT()
+            self.ListenForEvent(
+                ENGINE_NAMESPACE,
+                ENGINE_SYSTEM_NAME,
+                "OnKeyPressInGame",
+                self,
+                self.on_key_press_in_game,
+            )
+            self._listening = True
+            self._initialized = True
+            INIT_RELOAD_TIME()
+        IPCSystem.UPDATE_CLIENT()
+        return ClientSystem.Update(self)
+
+    def Destroy(self):
+        try:
+            if self._listening:
+                self.UnListenForEvent(
+                    ENGINE_NAMESPACE,
+                    ENGINE_SYSTEM_NAME,
+                    "OnKeyPressInGame",
+                    self,
+                    self.on_key_press_in_game,
+                )
+                self._listening = False
+        finally:
+            try:
+                IPCSystem.ON_CLIENT_EXIT()
+            finally:
+                self._initialized = False
+                Lifecycle.deactivate(self)
+
+    def on_key_press_in_game(self, args):
+        if args["isDown"] != "0":
+            return
+        if args["screenName"] != "hud_screen" and not DEBUG_CONFIG.get(
+            "reload_key_global", False
+        ):
+            return
+
+        key = args["key"]
+        if key == str(DEBUG_CONFIG.get("reload_key", "82")):
+            RELOAD_MOD()
+        elif key == str(DEBUG_CONFIG.get("reload_world_key", "")):
+            RELOAD_WORLD()
+        elif key == str(DEBUG_CONFIG.get("reload_addon_key", "")):
+            RELOAD_ADDON()
+        elif key == str(DEBUG_CONFIG.get("reload_shaders_key", "")):
+            RELOAD_SHADERS()