检视面板显示标签价；鉴定指南五个示例；展示样例排队按钮

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

src/Decentralized/UsedDealerClient.cs

@@ -64,6 +64,7 @@ namespace Decentralized
         /// <summary>鉴定公会送来的卡：一成是假卡；默认估价是按标称型号算的价。</summary>
         private static GameItem CreateForAppraisal()
         {
+            if (ShowcaseCases.Override != null) { var o = ShowcaseCases.Override(); ShowcaseCases.Override = null; return o; }
             var rng = Session.Data?.Rng ?? new Rng(1);
             int day = StoreStation.GetDayCounter();
             var cards = UsedDealers.Cards(DealerKind.Middleman, day, rng);
@@ -96,6 +97,12 @@ namespace Decentralized
         private static void Place(DealerKind kind, List<UsedCard> cards, Rng rng) => Log.Guard("二手贩子上货", () =>
                 {
                     NegociationUIManager.Instance.OpenUI();
+                    if (ShowcaseCases.Override != null)
+                    {
+                        var one = ShowcaseCases.Override(); ShowcaseCases.Override = null;
+                        PlayerStore.Instance.AddDirectSellingItemToTable(one);
+                        return;
+                    }
                     var placed = new List<string>();
                     foreach (var c in cards)
                     {