Type the payee address before releasing payments in the Web3 page

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

src/Decentralized/Session.cs

@@ -30,6 +30,14 @@ namespace Decentralized
         public List<MarketEvent> ActiveEvents = new List<MarketEvent>();
         public NightReport LastNight;
         public bool OpeningNewsShown;
+        /// <summary>各个收款方的地址（平台、混币器、Ponero 兑换处等），第一次用到时随机生成并存档。付款前要手输。</summary>
+        public Dictionary<string, string> Addresses = new Dictionary<string, string>();
+
+        public string Address(string key)
+        {
+            if (!Addresses.TryGetValue(key, out var a)) { a = "0x" + Rng.NextUInt().ToString("x8").Substring(0, 6); Addresses[key] = a; }
+            return a;
+        }
         /// <summary>当天用币付款的成交额（信用点），夜间清零。</summary>
         public double CoinSalesToday;
     }