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

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

tests/Decentralized.Domain.Tests/Program.cs

@@ -526,6 +526,20 @@ internal static class Program
             Check(w2.Flagged, "制裁期间提出的币被标记");
         });
 
+        Test("CRT 冻结：冻一半、可动用余额减少、到期解冻；声望越高越不容易被冻", () =>
+        {
+            var w = new Wallet { Address = "f" };
+            w.Add(Assets.CRT, 1000);
+            double fz = w.Freeze(Assets.CRT, Tuning.CrtFreezeShare, 10);
+            Check(Near(fz, 500, 1e-9) && Near(w.Avail(Assets.CRT), 500, 1e-9) && Near(w.Get(Assets.CRT), 1000, 1e-9), "冻结一半：余额不变，可动用 500");
+            Check(Near(w.Freeze(Assets.CRT, 1, 12), 500, 1e-9) && Near(w.Avail(Assets.CRT), 0, 1e-9), "再冻一次只冻可动用部分");
+            Check(w.Thaw(9).Count == 0 && w.Thaw(12).Count == 1 && Near(w.Avail(Assets.CRT), 1000, 1e-9), "到期（取较晚的日子）全部解冻");
+            Check(new Mixer().Deposit(w, Assets.CRT, 2000, 1, 1, a => 1) == null, "余额不足不能存入混币器");
+            int low = 0, high = 0;
+            for (int i = 0; i < 2000; i++) { if (Stablecoins.CrtFrozenByCrackdown(0, new Rng((ulong)i + 1))) low++; if (Stablecoins.CrtFrozenByCrackdown(50, new Rng((ulong)i + 1))) high++; }
+            Check(low > 700 && low < 900 && high == 0, $"声望 0 约 40% 被冻：{low}/2000；声望 50 不会被冻：{high}");
+        });
+
         Console.WriteLine($"\n{_passed} 通过，{_failed} 失败");
         return _failed == 0 ? 0 : 1;
     }