Stage 9.2: mixer operator Tumbler storyline with key drive item

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

src/Decentralized/Items.cs

@@ -19,6 +19,7 @@ namespace Decentralized
         public const string Web3Guide = "pd_web3_guide";
         public const string GpuPrefix = "pd_gpu_";
         public const string HwWallet = "pd_hw_wallet";
+        public const string KeyDrive = "pd_key_drive";
         /// <summary>硬件钱包被动过手脚（供应链投毒）。外观、说明都不显示。</summary>
         public const string PoisonTag = "PD_POISONED";
 
@@ -47,6 +48,7 @@ namespace Decentralized
             dir.Add(Guide, CreateGuide);
             dir.Add(Web3Guide, CreateWeb3Guide);
             dir.Add(HwWallet, CreateHwWallet);
+            dir.Add(KeyDrive, CreateKeyDrive);
             AsicItems.Register(dir);
             foreach (var spec in Hardware.Specs.Values.Where(s => !s.Asic && !s.Scrap))
             {
@@ -128,6 +130,19 @@ namespace Decentralized
             return item;
         }
 
+        /// <summary>Tumbler 的密钥盘：违禁品（高），搜查时被翻出来按价值记罪证。</summary>
+        private static GameItem CreateKeyDrive()
+        {
+            var item = ItemDirectory.CreateEmptyItem(KeyDrive);
+            item.SetSpriteAndShapeFromMod(ModInfo.Id, "key_drive");
+            item.name = L.T("item.keydrive.name");
+            item.shortDescription = L.T("item.keydrive.desc");
+            item.unitValue = Tuning.TumblerDriveValue;
+            ContrabandHelper.InitContrabandItem(item, 3);
+            ModHelper.SetSource(item, ModInfo.Id, ModInfo.Name);
+            return item;
+        }
+
         private static bool CanTarget(GameItem t) => t != null && t.identifier == Terminal && (CanAddWallet?.Invoke() ?? false);
 
         public static GameItem NewHwWallet(bool poisoned)