Phase 2: CRT freeze during crackdowns (frozen balance, thaw, news, test entry)

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

src/Decentralized.Domain/Wallet.cs

@@ -32,6 +32,36 @@ namespace Decentralized.Domain
         /// <summary>买入均价（信用点）；没有买入记录（例如全是挖出来的）返回 null。</summary>
         public double? AvgBuy(string asset) => BuyQty.TryGetValue(asset, out var q) && q > 1e-9 ? BuyCost[asset] / q : (double?)null;
 
+        /// <summary>被发行方冻结的数量（只有可冻结的币：CRT 在镇压期间、CRC），和解冻的日子。冻结的币仍计入余额与估值，但不能花、不能转。</summary>
+        public Dictionary<string, double> Frozen = new Dictionary<string, double>();
+        public Dictionary<string, int> FrozenUntil = new Dictionary<string, int>();
+
+        /// <summary>可动用的余额（扣掉冻结部分）。</summary>
+        public double Avail(string asset) => Math.Max(0, Get(asset) - (Frozen.TryGetValue(asset, out var f) ? f : 0));
+
+        /// <summary>冻结该币当前余额的 share 比例，直到 untilDay（含）。已冻结的不重复冻。返回冻结的数量。</summary>
+        public double Freeze(string asset, double share, int untilDay)
+        {
+            double amount = Avail(asset) * Math.Max(0, Math.Min(1, share));
+            if (amount <= 1e-9) return 0;
+            Frozen[asset] = (Frozen.TryGetValue(asset, out var f) ? f : 0) + amount;
+            FrozenUntil[asset] = Math.Max(untilDay, FrozenUntil.TryGetValue(asset, out var u) ? u : 0);
+            return amount;
+        }
+
+        /// <summary>解冻到期的币，返回 (币种, 数量) 列表。</summary>
+        public List<KeyValuePair<string, double>> Thaw(int day)
+        {
+            var list = new List<KeyValuePair<string, double>>();
+            foreach (var a in new List<string>(FrozenUntil.Keys))
+                if (day >= FrozenUntil[a])
+                {
+                    list.Add(new KeyValuePair<string, double>(a, Frozen.TryGetValue(a, out var f) ? f : 0));
+                    Frozen.Remove(a); FrozenUntil.Remove(a);
+                }
+            return list;
+        }
+
         public double Get(string asset) => Balances.TryGetValue(asset, out var v) ? v : 0;
 
         public void Add(string asset, double amount)