商城按钮改为提示去找百店老板娘

203 没有网页商城，端口也没有网页窗口，系统菜单的商城按钮打开的是空窗口。
新 PORT 模块 mt_mallhint 替换 SystemDialog 的商城按钮和 GameWindow 的 mall 命令处理，
弹出提示框（并在聊天栏提示）：商城物品请到各村杂货店旁的百店老板娘处购买。

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

src/platform/ScriptLib/MallHintScript.inc

@@ -0,0 +1,44 @@
+// The system menu's 商城 button (PORT), run by PythonBoot::RunMainScript as module mt_mallhint. In 40250 it
+// sends /in_game_mall and the server answers `mall <url>`, which game.GameWindow opens in the web window;
+// 203 has no web shop and the port has no web view, so the window stayed empty. The mall items are sold by
+// NPC 9010 百店老板娘 next to each village's general store instead (tools/server/item-mall-shop), so the
+// button, and a `mall` command from the server, show where to find her. Both are replaced on the classes
+// before the system dialog and the game window are created, which bind them.
+// Strings are UTF-8 here and go through player.AutoHuntLocalize into the locale's code page.
+static const char c_szMallHintScript[] = R"PY(# -*- coding: utf-8 -*-
+import chat
+import game
+import player
+import uiCommon
+import uiSystem
+
+L = player.AutoHuntLocalize
+
+HINT = "商城物品请到各村杂货店旁的百店老板娘处购买"
+POPUP_WIDTH = 330
+
+_popup = []
+
+
+def _ShowHint():
+	chat.AppendChat(chat.CHAT_TYPE_INFO, L(HINT))
+	if not _popup:
+		popup = uiCommon.PopupDialog()
+		popup.SetWidth(POPUP_WIDTH)
+		popup.SetText(L(HINT))
+		_popup.append(popup)
+	_popup[0].Open()
+
+
+def _ClickInGameShopButton(self):
+	self.Close()
+	_ShowHint()
+
+
+def _InGameShop_Show(self, url):
+	_ShowHint()
+
+
+uiSystem.SystemDialog._SystemDialog__ClickInGameShopButton = _ClickInGameShopButton
+game.GameWindow._GameWindow__InGameShop_Show = _InGameShop_Show
+)PY";

src/platform/ScriptLib/PythonBoot.cpp

@@ -879,6 +879,7 @@ namespace PythonBoot
 #include "FrameRateOptionScript.inc"
 #include "UIScaleOptionScript.inc"
 #include "InventoryPagesScript.inc"
+#include "MallHintScript.inc"
 
 static void install_script_module(const char* c_szModule, const char* c_szScript)
 {
@@ -937,6 +938,7 @@ bool RunMainScript(const char* lpCmdLine, std::string* error)
 		install_script_module("mt_framerate", c_szFrameRateOptionScript);
 		install_script_module("mt_uiscale", c_szUIScaleOptionScript);
 		install_script_module("mt_inventory", c_szInventoryPagesScript);
+		install_script_module("mt_mallhint", c_szMallHintScript);
 	}
 	return true;
 }