显卡鉴定手册：8 页阅读窗口、8 种语言；外观折价进 Tuning

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

src/Decentralized.Domain/Tuning.cs

@@ -88,6 +88,8 @@ namespace Decentralized.Domain
         public const int UsedFirstDay = 3;
         /// <summary>显卡价值 = 型号定价 ×（下限 + (1 − 下限) × 健康度）。</summary>
         public const double CardValueFloor = 0.25;
+        /// <summary>外观折价（占价值的比例）：叶片积灰 / 缺角，金手指发暗 / 氧化，挡板划痕，封条缺失。</summary>
+        public const double CardFanDust = 0.04, CardFanChipped = 0.12, CardFingersDark = 0.04, CardFingersOxidized = 0.12, CardBracketScratch = 0.02, CardSealMissing = 0.06;
         /// <summary>非主交易对每晚被拉回参考价的比例，及其深度占主交易对的比例。</summary>
         public const double SideArbRate = 0.75, SideDepthShare = 0.3;
         /// <summary>Web3 黑市：开放所需黑市声望，中 / 高档货所需声望，现货每周刷新的天数与基础件数（每高 BmStockPerRep 声望多一件），现货溢价。</summary>