已实现“设置里手动填写上下文保存长度（默认 10 万，最大 20 万）”：

新增设置项：Source/WulaFallenEmpire/WulaFallenEmpireSettings.cs 增加 maxContextTokens 并持久化。
设置界面：Source/WulaFallenEmpire/WulaFallenEmpireMod.cs 增加输入框（Widgets.TextFieldNumeric，范围 1000..200000）。
生效点：Source/WulaFallenEmpire/EventSystem/AI/UI/Dialog_AIConversation.cs 压缩历史时不再用常量 MaxHistoryTokens，改为读取 WulaFallenEmpireMod.settings.maxContextTokens。
文本：1.6/1.6/Languages/ChineseSimplified (简体中文)/Keyed/WULA_Keyed.xml 添加 Wula_AISettings_MaxContextTokens / Wula_AISettings_MaxContextTokensDesc。
已编译输出：1.6/1.6/Assemblies/WulaFallenEmpire.dll

1.6/1.6/Languages/ChineseSimplified (简体中文)/Keyed/WULA_Keyed.xml

@@ -156,6 +156,8 @@
   <Wula_AISettings_ApiKey>API 密钥:</Wula_AISettings_ApiKey>
   <Wula_AISettings_BaseUrl>API 地址 (Base URL):</Wula_AISettings_BaseUrl>
   <Wula_AISettings_Model>模型名称:</Wula_AISettings_Model>
+  <Wula_AISettings_MaxContextTokens>上下文保存长度 (Token 估算上限):</Wula_AISettings_MaxContextTokens>
+  <Wula_AISettings_MaxContextTokensDesc>控制 AI 对话历史在超过上限时自动压缩。数值越小越省成本，但 AI 更容易“忘记”。</Wula_AISettings_MaxContextTokensDesc>
   <Wula_AISettings_UseStreaming>启用流式传输 (实验性)</Wula_AISettings_UseStreaming>
   <Wula_AISettings_UseStreamingDesc>启用实时打字机效果。如果遇到问题请禁用。</Wula_AISettings_UseStreamingDesc>
 

Source/WulaFallenEmpire/EventSystem/AI/UI/Dialog_AIConversation.cs

@@ -21,11 +21,17 @@ namespace WulaFallenEmpire.EventSystem.AI.UI
         private bool _scrollToBottom = false;
         private List<AITool> _tools = new List<AITool>();
         private Dictionary<int, Texture2D> _portraits = new Dictionary<int, Texture2D>();
-        private const int MaxHistoryTokens = 100000;
+        private const int DefaultMaxHistoryTokens = 100000;
         private const int CharsPerToken = 4;
         private int _continuationDepth = 0;
         private const int MaxContinuationDepth = 6;
 
+        private static int GetMaxHistoryTokens()
+        {
+            int configured = WulaFallenEmpire.WulaFallenEmpireMod.settings?.maxContextTokens ?? DefaultMaxHistoryTokens;
+            return Math.Max(1000, Math.Min(200000, configured));
+        }
+
         // Static instance for tools to access
         public static Dialog_AIConversation Instance { get; private set; }
         
@@ -467,7 +473,7 @@ When the player requests any form of resources, you MUST follow this multi-turn
         private void CompressHistoryIfNeeded()
         {
             int estimatedTokens = _history.Sum(h => h.message?.Length ?? 0) / CharsPerToken;
-            if (estimatedTokens > MaxHistoryTokens)
+            if (estimatedTokens > GetMaxHistoryTokens())
             {
                 int removeCount = _history.Count / 2;
                 if (removeCount > 0)

Source/WulaFallenEmpire/WulaFallenEmpireMod.cs

@@ -10,6 +10,7 @@ namespace WulaFallenEmpire
     public class WulaFallenEmpireMod : Mod
     {
         public static WulaFallenEmpireSettings settings;
+        private string _maxContextTokensBuffer;
 
         public WulaFallenEmpireMod(ModContentPack content) : base(content)
         {
@@ -38,6 +39,12 @@ namespace WulaFallenEmpire
             listingStandard.Label("Wula_AISettings_Model".Translate());
             settings.model = listingStandard.TextEntry(settings.model);
 
+            listingStandard.GapLine();
+            listingStandard.Label("Wula_AISettings_MaxContextTokens".Translate());
+            listingStandard.Label("Wula_AISettings_MaxContextTokensDesc".Translate());
+            Rect tokensRect = listingStandard.GetRect(Text.LineHeight);
+            Widgets.TextFieldNumeric(tokensRect, ref settings.maxContextTokens, ref _maxContextTokensBuffer, 1000, 200000);
+
             listingStandard.End();
             base.DoSettingsWindowContents(inRect);
         }

Source/WulaFallenEmpire/WulaFallenEmpireSettings.cs

@@ -7,12 +7,14 @@ namespace WulaFallenEmpire
         public string apiKey = "sk-xxxxxxxx";
         public string baseUrl = "https://api.deepseek.com";
         public string model = "deepseek-chat";
+        public int maxContextTokens = 100000;
 
         public override void ExposeData()
         {
             Scribe_Values.Look(ref apiKey, "apiKey", "sk-xxxxxxxx");
             Scribe_Values.Look(ref baseUrl, "baseUrl", "https://api.deepseek.com");
             Scribe_Values.Look(ref model, "model", "deepseek-chat");
+            Scribe_Values.Look(ref maxContextTokens, "maxContextTokens", 100000);
             base.ExposeData();
         }
     }