矿架改回 4×4（5×4 放不进任何容器）；测试按钮清柜台和一半储物箱

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

src/Decentralized/ShowcaseCases.cs

@@ -1,4 +1,5 @@
 using System;
+using System.Linq;
 using System.Collections.Generic;
 using Decentralized.Domain;
 
@@ -98,6 +99,15 @@ namespace Decentralized
                 Place(item);
                 Log.Info($"展示样例（鉴定）{_next}/{All.Count}：{c.Name}");
             }));
+            ModHelper.AddDebugFunction(ModInfo.Id, ModInfo.Name, "Clear counter + half of storage (test)", () => Log.Guard("清柜台与一半储物", () =>
+            {
+                var e = EmporiumEntry.Instance;
+                int counter = 0, bays = 0;
+                foreach (var it in e.backInvinvElement.childItems.ToList()) { it.Destroy(); counter++; }
+                var storage = e.invElement.childItems.Where(i => i.identifier != null && i.identifier.StartsWith("storage_bay")).ToList();
+                for (int i = 0; i < storage.Count; i += 2) { storage[i].Destroy(); bays++; }
+                Log.Info($"清空柜台 {counter} 件；储物箱 {storage.Count} 个里去掉 {bays} 个");
+            }));
             ModHelper.AddDebugFunction(ModInfo.Id, ModInfo.Name, "Paper: dump starters (test)", () => Log.Guard("纸张起点", () =>
             {
                 var sb = new System.Text.StringBuilder("\n");