Tumbler 扩展实测修正：没有出款可还原时单独一句日志；每次上门是同一个外观；测试按钮“剧情重来”

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

src/Decentralized.Domain/StoryMods.cs

@@ -127,6 +127,8 @@ namespace Decentralized.Domain
         public const int Hide = 1, Report = 2, Sell = 3;
         public int StartDay = -1, Stage, Choice, VisitedDay = -1;
         public bool Done;
+        /// <summary>Tumbler 的外观（第一次上门时随机定下，之后每次都一样）。</summary>
+        public string Sprite;
 
         /// <summary>第几次上门在哪一天（相对开始日）。</summary>
         public static readonly int[] Offsets = { 0, 3, 5, 9 };