Seller claim lapses when the card is bought unless edited with a labeler; test helpers for sell and buy sides

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

src/Decentralized/DealerStock.cs

@@ -41,6 +41,33 @@ namespace Decentralized
                 Walk(m.panel.transform, 0);
                 Log.Info(sb.ToString());
             }));
+            ModHelper.AddDebugFunction(ModInfo.Id, ModInfo.Name, "Edit claim + offer to buyer (test)", () => Log.Guard("卖出侧测试", () =>
+            {
+                var rng = Session.Data.Rng;
+                // 自己的一张真卡：标签机改成旗舰型号并把成色说成没问题，再摆给一位买家
+                var item = Items.NewCard("RZX70", 55, null, rng);
+                Items.Give(item);
+                var u = Items.ToUnit(item);
+                var c = Claim.Truth(u); c.Model = "RZX90"; c.Fan = 0; c.Fingers = 0; c.Bracket = 0; c.Sticker = 0;
+                item.EnableTag(Items.EditedTag);
+                Items.SetClaim(item, c, 0);
+                var client = new StoreClient { identifier = "pd_test_buyer", displayName = "买家", spriteName = SpriteDict.GetRandomScavSpriteName(), clientIntent = StoreClient.ClientIntent.BUY };
+                client.CompleteClientCreation();
+                PlayerStore.Instance.currentClientInstance = StoreClientInstance.CreateClientInstance(client);
+                Log.Info($"测试：卡 #{item.uniqueId} 说法 {c.Encode()}，真实 {Claim.Truth(u).Encode()}，价格 {item.unitValue}，信誉前");
+                Items.OfferForTest(item);
+                Log.Info($"测试：验货后 Exposed={Items.Exposed(item)} 价格 {item.unitValue}");
+            }));
+            ModHelper.AddDebugFunction(ModInfo.Id, ModInfo.Name, "Buy scam card (test)", () => Log.Guard("买入侧测试", () =>
+            {
+                var rng = Session.Data.Rng;
+                var item = Items.NewCard("RZX90", 60, "RZX60", rng, DealerKind.Scammer, 0);
+                long before = item.unitValue;
+                GeneralHelper.SetItemOwned(item, true);
+                Items.Refresh(item);
+                Items.Give(item);
+                Log.Info($"买入测试：卡 #{item.uniqueId} 买前报价 {before}，买下后价值 {item.unitValue}，真实 {CardValue.True(Items.ToUnit(item))}，说法 {(Items.GetClaim(item)?.Encode() ?? "无")}");
+            }));
             ModHelper.AddDebugFunction(ModInfo.Id, ModInfo.Name, "Dr. Jackson stock (test)", () =>
             {
                 EmporiumEntry.Instance.ClearFrontInv();