Stage 7.2: manipulation detection (player price push, prediction/perp forfeits)

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

src/Decentralized/PredictGame.cs

@@ -17,7 +17,7 @@ namespace Decentralized
         private static readonly double[] GasCuts = { 0.8, 1.0, 1.2, 1.4 };
 
         /// <summary>夜间结算开始时记下的收盘数据：行情盘读夜间更新前的价格，gas 盘读当天的 gas（接着链上夜间事件就会改成明天的）。</summary>
-        public static double ClosePrice, CloseGas;
+        public static double ClosePrice, CloseGas, ClosePush;
 
         public static bool Available(int day) => Session.Data != null && Unlock.IsUnlocked && day >= Tuning.PredictUnlockDay;
 
@@ -266,6 +266,7 @@ namespace Decentralized
                                     list.Add(L.T("predict.clue.queued2", today + mgr.futurEventsDay[i], e.GetDisplayName()));
                             }
                         list.Add(L.T("predict.clue.anchor", Fmt.Num(d.Market.Anchor(d.ActiveEvents))));
+                        if (Math.Abs(d.Market.PlayerPush) >= Tuning.ManipFree) list.Add(L.T("predict.clue.push", (d.Market.PlayerPush * 100).ToString("+0.0;-0.0", System.Globalization.CultureInfo.InvariantCulture)));
                         break;
                     }
                 case PredictKind.Gas: