鉴定改版：风扇数、供电口、丝印、序列号四项真伪依据在前，假卡依据各自独立（平均 1.5 项）；指南去档次、去卖家说法

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

src/Decentralized.Domain/Mining.cs

@@ -32,6 +32,8 @@ namespace Decentralized.Domain
         /// <summary>各档次的实物特征：供电口针数（旗舰是两个 8 针）与风扇数量。</summary>
         public static readonly string[] PowerPins = { "6", "8", "8", "8+8" };
         public static readonly int[] FanCount = { 1, 2, 3, 3 };
+        /// <summary>各档次的供电口：0 = 6 针，1 = 8 针，2 = 双 8 针。</summary>
+        public static readonly int[] PinClass = { 0, 1, 1, 2 };
 
         public const string Probidia = "Probidia", Pmd = "PMD", RatDigg = "RatDigg";
 
@@ -109,6 +111,11 @@ namespace Decentralized.Domain
         public HardwareSpec Label => Hardware.Specs[Model];
         public HardwareSpec Chip => Hardware.Specs[FakeOf ?? Model];
 
+        /// <summary>实物上的风扇数：对得上标称型号时是标称档次的，对不上（假卡的破绽）时是真实芯片的。</summary>
+        public int ObservedCount => Hardware.FanCount[(Look.CountBad != 0 ? Chip : Label).Tier];
+        /// <summary>实物上的供电口：0 = 6 针，1 = 8 针，2 = 双 8 针；规则同风扇数。</summary>
+        public int ObservedPin => Hardware.PinClass[(Look.PinBad != 0 ? Chip : Label).Tier];
+
         /// <summary>当前算力：健康 ≥ 50 时满算力，低于 50 线性降到健康 0 时的 60%。</summary>
         public double Hash(ModuleBonus b)
         {