feat: CardTracker — 出牌记录+对手手牌推断+炸弹检测

CardTracker.cs (新文件, 400行):
- 48位bitset追踪已出牌(按ID)
- 对手pass约束记录: pass对子9→该对手无对子≥9
- BombsOutside(): 外面还剩几个炸弹
- BombRanks(): 可能藏炸弹的rank列表
- CanAnyoneBeat(play): 判断是否可能被压制
- SampleOpponentHands(): 约束采样替代随机分配
- 支持6种牌型的压制判断: 单张/对子/炸弹/顺子/连对/飞机

IsmctsBot.cs 整合:
- CardTracker实例,每次DecidePlay/DecideBaoZhuang调用Update()
- 炸弹感知加权: 外面没炸弹→我方炸弹+25%, 快赢时+15%
- 外面有炸弹且快赢→保守出牌(-5%多牌分)
- SimulateToEnd改用约束采样(回退随机补齐)

PdkFriendServer/Logic/IsmctsBot.cs

@@ -18,32 +18,34 @@ namespace PdkFriendServer.Logic
     {
         private readonly int _simulations;
         private readonly Random _rng;
-            private const double BaoThreshold = 0.70; // 100局校准: 60%→30%, 提至70%
-            private const double MultiBonusPerCard = 0.10; // 多牌加权: 每多1张+10%
-            private const int FastSims = 40; // 快速评估模拟次数
+        private readonly CardTracker _tracker = new CardTracker();
+        private const double BaoThreshold = 0.70;
+        private const double MultiBonusPerCard = 0.10;
+        private const int FastSims = 40;
 
-            public IsmctsBot(int simulations = 800)
-            {
-                _simulations = simulations;
-                _rng = new Random();
-            }
+        public IsmctsBot(int simulations = 800)
+        {
+            _simulations = simulations;
+            _rng = new Random();
+        }
 
-            // ---- 自适应模拟次数 ----
-            private int AdaptiveSims(int handSize)
-            {
-                if (handSize <= 3) return 2000;   // 决胜时刻
-                if (handSize <= 6) return 1500;
-                if (handSize <= 10) return 1200;
-                if (handSize <= 13) return 1000;
-                return 800;                        // 开局快速
-            }
+        // ---- 自适应模拟次数 ----
+        private int AdaptiveSims(int handSize)
+        {
+            if (handSize <= 3) return 2000;
+            if (handSize <= 6) return 1500;
+            if (handSize <= 10) return 1200;
+            if (handSize <= 13) return 1000;
+            return 800;
+        }
 
         // ---- 包庄决策 ----
 
-            public bool DecideBaoZhuang(PdkBotView view)
-            {
-                // 最小步数规划：手牌结构好不好
-                int minPlays = HandOptimizer.MinPlays(view.MyHand);
+        public bool DecideBaoZhuang(PdkBotView view)
+        {
+            _tracker.Update(view);
+
+            int minPlays = HandOptimizer.MinPlays(view.MyHand);
                 double handEfficiency = view.MyHand.Length > 0
                     ? (double)(view.MyHand.Length - minPlays) / view.MyHand.Length : 0;
 
@@ -77,8 +79,9 @@ namespace PdkFriendServer.Logic
         // ---- 出牌决策 ----
 
             public PlayOutCardPdkF DecidePlay(PdkBotView view)
-            {
-                var hand = view.MyHand;
+                    {
+                        _tracker.Update(view);
+                        var hand = view.MyHand;
                 if (hand.Length == 0) return Pass(view);
 
                 bool isFirstPlay = view.MaxPlayCard.GameNum <= 0;
@@ -147,7 +150,33 @@ namespace PdkFriendServer.Logic
                     }
                 }
 
-                // 5. 两阶段选择：多牌优先
+                // 5. 炸弹感知加权
+                int bombsOutside = _tracker.BombsOutside(hand);
+                var bombRanks = _tracker.BombRanks(hand);
+
+                for (int i = 0; i < scoredCandidates.Count; i++)
+                {
+                    var (p, wr, am, m) = scoredCandidates[i];
+                    bool isBomb = p.Ids != null && p.Ids.Length == 4
+                        && hand.Count(c => c.GameNum == p.GameNum && c.GameState == 1) == 4;
+
+                    if (isBomb)
+                    {
+                        // 我方炸弹
+                        if (bombsOutside == 0) wr += 0.25;        // 外面没炸弹 → 我方炸弹无敌
+                        else if (am <= 3) wr += 0.15;              // 快赢了，果断炸
+                        else wr -= 0.05;                           // 先留着
+                    }
+                    else if (bombsOutside > 0 && am <= 3)
+                    {
+                        // 外面有炸弹但我快赢了 → 出牌保守，少加多牌分
+                        if (m) wr -= 0.05;
+                    }
+
+                    scoredCandidates[i] = (p, wr, am, m);
+                }
+
+                // 6. 两阶段选择：多牌优先
                 scoredCandidates.Sort((a, b) => b.winRate.CompareTo(a.winRate));
                 var best = scoredCandidates[0];
 
@@ -189,9 +218,23 @@ namespace PdkFriendServer.Logic
 
             var allCards = GenerateDeck();
             var unknown = allCards.Where(c => !myHand.Any(h => h.ID == c.ID)).ToList();
-            Shuffle(unknown);
-            hands[nextPos - 1].AddRange(unknown.Take(view.ShenYuCard[nextPos - 1]));
-            hands[oppPos - 1].AddRange(unknown.Skip(view.ShenYuCard[nextPos - 1]).Take(view.ShenYuCard[oppPos - 1]));
+
+            // 使用 CardTracker 进行约束采样
+            var sampled = _tracker.SampleOpponentHands(myHand, view, _rng);
+            hands[nextPos - 1].AddRange(sampled[0]);
+            hands[oppPos - 1].AddRange(sampled[1]);
+
+            // 如果约束采样没填满，用随机采样补齐
+            var usedIds = new HashSet<byte>(myHand.Select(c => c.ID));
+            foreach (var c in hands[nextPos - 1]) usedIds.Add(c.ID);
+            foreach (var c in hands[oppPos - 1]) usedIds.Add(c.ID);
+
+            var remaining = unknown.Where(c => !usedIds.Contains(c.ID)).ToList();
+            Shuffle(remaining);
+            int n1Need = view.ShenYuCard[nextPos - 1] - hands[nextPos - 1].Count;
+            int n2Need = view.ShenYuCard[oppPos - 1] - hands[oppPos - 1].Count;
+            if (n1Need > 0) hands[nextPos - 1].AddRange(remaining.Take(n1Need));
+            if (n2Need > 0) hands[oppPos - 1].AddRange(remaining.Skip(n1Need).Take(n2Need));
 
             int current, maxPlayer;
             PlayOutCardPdkF maxPlay;