Flagged status follows traceable transfers; wallet split review

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

tests/Decentralized.Domain.Tests/Program.cs

@@ -853,6 +853,16 @@ internal static class Program
             Check(Math.Abs(v - 6000) < 1e-6 && w.Balances.Count == 0 && w.Frozen.Count == 0 && w.Taint == 0 && w.Basis == 0, $"全部转走（含冻结），污点和成本清零：{v}");
         });
 
+        Test("被标记的钱包转出可追踪的币，收款方也被标记；Ponero 不会", () =>
+        {
+            Func<string, double> price = x => 1;
+            var f = new Wallet { Address = "f", Flagged = true }; f.Add(Assets.CRC, 100); f.Add(Assets.Ponero, 100);
+            var p1 = new Wallet { Address = "p1" }; var p2 = new Wallet { Address = "p2" };
+            Wallet.Transfer(f, p1, Assets.CRC, 10, price);
+            Wallet.Transfer(f, p2, Assets.Ponero, 10, price);
+            Check(p1.Flagged && !p2.Flagged, "CRC 带标记，Ponero 不带");
+        });
+
         Test("多钱包：退款、出售回款、混币提回都回到原来的钱包", () =>
         {
             Func<string, double> price = a => a == Assets.PSC ? 100 : 1;