ra: 开局自动托管给传统人机（Bot Takeover）

背景

- OpenRA 的 Player 默认按‘人类’设计：不自动执行建造/展开/生产等，需要玩家输入。

- 为了实现全人机阵营交锋（后续再叠加 LLM 增强），需要在开局就把本地玩家控制权交还给传统人机。

改动

- 新增 BotTakeoverManager（Player trait）：WorldLoaded 后自动为本地人类玩家激活传统 ModularBot(normal)，并授予 nable-normal-ai，确保传统 AI 全链路模块从开局开始运行。

- 将右下角托管按钮逻辑改为切换 BotTakeoverManager，用于随时取消/恢复托管（避免直接激活 LLM bot 导致双 bot 并行与性能风险）。

- RA UI 增加托管按钮与中文提示文案。

影响

- 开局无需等待/点击即可展开 MCV 并开始传统 AI 运营；同时仍可通过按钮取消托管恢复手动操作。

OpenRA.Mods.Common/Widgets/Logic/Ingame/LLMTakeoverLogic.cs

@@ -0,0 +1,57 @@
+#region Copyright & License Information
+/*
+ * Copyright (c) The OpenRA Developers and Contributors
+ * This file is part of OpenRA, which is free software. It is made
+ * available to you under the terms of the GNU General Public License
+ * as published by the Free Software Foundation, either version 3 of
+ * the License, or (at your option) any later version. For more
+ * information, see COPYING.
+ */
+#endregion
+
+using System.Collections.Generic;
+using OpenRA.Mods.Common.Traits;
+using OpenRA.Widgets;
+
+namespace OpenRA.Mods.Common.Widgets
+{
+	public class LLMTakeoverLogic : ChromeLogic
+	{
+		readonly World world;
+
+		[ObjectCreator.UseCtor]
+		public LLMTakeoverLogic(Widget widget, World world, Dictionary<string, MiniYaml> logicArgs)
+		{
+			this.world = world;
+
+			var button = widget.Get<ButtonWidget>("LLM_TAKEOVER");
+			button.GetText = () => IsTakeoverActive() ? "Cancel AI" : "AI";
+			button.IsHighlighted = () => IsTakeoverActive();
+			button.OnClick = OnTakeoverClick;
+			button.IsDisabled = () => world.LocalPlayer == null
+				|| world.LocalPlayer.WinState != WinState.Undefined;
+		}
+
+		bool IsTakeoverActive()
+		{
+			var player = world.LocalPlayer;
+			if (player == null)
+				return false;
+
+			var takeover = player.PlayerActor.TraitOrDefault<BotTakeoverManager>();
+			return takeover != null && takeover.IsActive;
+		}
+
+		void OnTakeoverClick()
+		{
+			var player = world.LocalPlayer;
+			if (player == null)
+				return;
+
+			// Prefer the classic AI takeover manager (uses ModularBot + original bot modules).
+			var takeover = player.PlayerActor.TraitOrDefault<BotTakeoverManager>();
+			if (takeover != null)
+				takeover.Toggle();
+		}
+	}
+}