Chain drama: fee tiers, congestion, mempool drops, address poisoning, clipboard hijack, phishing; selected-button style

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

src/Decentralized/Session.cs

@@ -14,6 +14,13 @@ namespace Decentralized
         public List<string> Burnt = new List<string>();
     }
 
+    /// <summary>地址投毒的计划：某个钱包转给某地址后，到了这一天收到一笔来自相似地址的 0 币转入。</summary>
+    public sealed class PoisonPlan
+    {
+        public string Wallet, Target;
+        public int Day;
+    }
+
     /// <summary>一局的 mod 状态。整体序列化成 JSON 存进游戏的 mod 存档数据；显卡的健康度等存在显卡物品的标签上。</summary>
     public sealed class SaveData
     {
@@ -63,6 +70,10 @@ namespace Decentralized
             if (!Addresses.TryGetValue(key, out var a) || !ChainAddress.Valid(a)) { a = ChainAddress.Make(Rng.NextUInt()); Addresses[key] = a; }
             return a;
         }
+        /// <summary>网络拥堵的起止天（含）。</summary>
+        public int CongestedFrom = -1, CongestedUntil = -1;
+        public List<PoisonPlan> PoisonPlans = new List<PoisonPlan>();
+
         /// <summary>链上的区块高度：每签一笔交易往上走几块。</summary>
         public long Block = 1204331;
         /// <summary>当天用币付款的成交额（信用点），夜间清零。</summary>