Black market: elite shop for expensive goods, private sellers, weekly catalog value ~20k

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

src/Decentralized.Domain/Tuning.cs

@@ -108,10 +108,17 @@ namespace Decentralized.Domain
         public const int BmSaleHold = 3, BmRatingStart = 90, BmRatingFakeLoss = 10, BmMaxListings = 10;
         /// <summary>商家货架：每周的商家数（其中 2 家从矿卡 / 矿架 / 模组 4 类里抽，其余从其他类型里抽）、每家的货种数、每种货的库存范围；大宗商家出现概率、库存范围、送货天数；
         /// 各类商家的价格系数范围（订单价 = 基础价 × 系数）；批量折扣档（件数、折扣）。</summary>
-        public const int BmMerchantCount = 7, BmCoreMerchants = 2, BmMerchantListings = 3, BmQtyMin = 2, BmQtyMax = 5, BmBulkQtyMin = 10, BmBulkQtyMax = 25, BmBulkDays = 6;
+        public const int BmMerchantCount = 7, BmCoreMerchants = 2, BmMerchantListings = 3, BmQtyMin = 2, BmQtyMax = 6, BmBulkQtyMin = 10, BmBulkQtyMax = 25, BmBulkDays = 6;
         public const double BmBulkChance = 0.25, BmFactorMin = 0.70, BmFactorMax = 0.95, BmFactorNewMin = 0.85, BmFactorNewMax = 1.00, BmFactorUsedMin = 0.65, BmFactorUsedMax = 0.90, BmFactorBulkMin = 0.55, BmFactorBulkMax = 0.75;
         /// <summary>商家货架上单件基础价的上限（过贵的货不上，免得一件把周转量撑歪）。</summary>
         public const long BmMaxUnitValue = 4000;
+        /// <summary>尖端店铺：每周出现概率、货种数、库存范围、单件基础价下限、价格系数范围、送货天数。</summary>
+        public const double BmEliteChance = 0.15, BmFactorEliteMin = 0.85, BmFactorEliteMax = 1.00;
+        public const int BmEliteListings = 2, BmEliteQtyMax = 2, BmEliteDays = 5;
+        public const long BmEliteMinValue = 2000;
+        /// <summary>个人卖家：每周家数、货种数、库存上限、每件的价格系数范围（各件独立随机）、是骗子的概率、混进尖端货的概率。</summary>
+        public const int BmPersonalCount = 2, BmPersonalListings = 3, BmPersonalQtyMax = 2;
+        public const double BmPersonalFactorMin = 0.50, BmPersonalFactorMax = 1.20, BmPersonalScam = 0.25, BmPersonalEliteShare = 0.10;
         public const int BmBulk1Count = 5, BmBulk2Count = 10;
         public const double BmBulk1Discount = 0.05, BmBulk2Discount = 0.10;
         /// <summary>出售量越大货款越容易带污点：近 7 天成交额达到参考量时，污点概率与比例各加最多 BmVolumeTaintMax。</summary>