fix: CanAnKong硬编码false + 人类HUD显示听牌/杠/对手状态

修复:
- CanAnKong: 硬编码false → 检查手牌中4张相同(暗杠)
- HumanMahjongPlayer: 添加MeldsSolver依赖,实时检测听牌
- 人类HUD: 显示牌墙/副露/听牌🀄/杠类型(暗/明/加)
- 交互模式人类: 对手显示'X张手牌 | 已pung[..]'不暴露手牌

Demo/Program.cs

@@ -146,17 +146,43 @@ else
         // Show current hands
         if (!room.IsFinished)
         {
+            // In human mode, show only opponent hands (human HUD shows their own)
             Console.WriteLine();
-            Console.WriteLine("  当前手牌:");
-            foreach (var p in room.State.PlayerOrder)
+            if (humanMode)
             {
-                if (!room.State.AlivePlayers.Contains(p)) continue;
-                var hand = room.State.Hands[p];
-                Console.WriteLine($"    {p}: {string.Join(" ", hand.OrderBy(t => t).Select(MahjongTile.ToString))} ({hand.Count}张)");
+                Console.WriteLine("  对手状态:");
+                foreach (var p in room.State.PlayerOrder)
+                {
+                    if (p == "AI-东") continue; // skip human
+                    if (!room.State.AlivePlayers.Contains(p)) continue;
+                    var hand = room.State.Hands[p];
+                    var exposedStr = "";
+                    if (room.State.Exposed.TryGetValue(p, out var melds) && melds.Count > 0)
+                    {
+                        var descs = melds.Select(m =>
+                            $"{m.Type}[{string.Join(",", m.Tiles.Where(t => t != -1).Select(MahjongTile.ToString))}]");
+                        exposedStr = $" | 已{string.Join(" ", descs)}";
+                    }
+                    Console.WriteLine($"    {p}: {hand.Count}张手牌{exposedStr}");
+                }
+            }
+            else
+            {
+                Console.WriteLine("  当前手牌:");
+                foreach (var p in room.State.PlayerOrder)
+                {
+                    if (!room.State.AlivePlayers.Contains(p)) continue;
+                    var hand = room.State.Hands[p];
+                    Console.WriteLine($"    {p}: {string.Join(" ", hand.OrderBy(t => t).Select(MahjongTile.ToString))} ({hand.Count}张)");
+                }
             }
 
-            Console.Write("\n[按 Enter 继续]");
-            Console.ReadLine();
+            // In human mode, don't wait for Enter — human interactions already pause
+            if (!humanMode)
+            {
+                Console.Write("\n[按 Enter 继续]");
+                Console.ReadLine();
+            }
         }
     }