Prediction markets: news reaction, clues, gas/CRA/era markets, intel broker, bigger stakes

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

src/Decentralized/Session.cs

@@ -35,6 +35,10 @@ namespace Decentralized
         public PerpBook Perps = new PerpBook();
         /// <summary>预测市场：盘口、持仓、观测记录（下注资金用 Poinbase 账户的 CRC）。</summary>
         public PredictBook Predict = new PredictBook();
+        /// <summary>近几天的 gas 指数（每晚记明天的），情报线索里显示；最近一份局势简报。</summary>
+        public List<double> GasHist = new List<double>();
+        public List<string> Brief = new List<string>();
+        public int BriefDay = -1;
         /// <summary>质押日息下调的新闻已经发过。</summary>
         public bool CraLowNews;
         public Network Network = new Network();