Label bar: authenticity rows first, quality rows second; single-fan brand text moved off the fan

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

src/Decentralized.Domain/CardLabels.cs

@@ -49,7 +49,9 @@ namespace Decentralized.Domain
     public static class CardLabels
     {
         public const int RowSpec = 1, RowBuild = 2, RowFan = 4, RowFingers = 8, RowBracket = 16, RowPrint = 32, RowSerial = 64, RowSeal = 128, AllRows = 255;
-        public static readonly int[] Rows = { RowSpec, RowBuild, RowFan, RowFingers, RowBracket, RowPrint, RowSerial, RowSeal };
+        /// <summary>标签栏的顺序：前四行鉴定真伪（型号、供电与风扇、序列号条形码、丝印），后四行鉴定成色。</summary>
+        public static readonly int[] Rows = { RowSpec, RowBuild, RowSerial, RowPrint, RowFan, RowFingers, RowBracket, RowSeal };
+        public const int AuthRows = 4;
 
         /// <summary>各标签各取值对价格的影响（百分比，相加）：风扇叶片积灰 −4%、缺角 −12%；金手指发暗 −4%、氧化 −12%；挡板划痕 −2%；封条缺失 −6%。
         /// 型号、供电与风扇、丝印、序列号本身不扣价，它们决定的是这块卡是什么芯片。</summary>