终端只重建内容区并合并同帧刷新；平台费页文案；按住签名随 Gas 档位缩短

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

src/Decentralized/WalletWindow.cs

@@ -97,6 +97,13 @@ namespace Decentralized
             return L.T("hw.wallet.n", w.Name ?? (i + 1).ToString());
         }
 
+        /// <summary>按住 ✓ 签名要多久：基础秒数 × 该钱包当前 Gas 档位的速度倍数（快档短、慢档长）。</summary>
+        internal static float HoldSecs(string address)
+        {
+            var w = Session.Data?.Own(address);
+            return (float)(Tuning.TxHoldSecs * (w == null ? 1 : TxRules.TierSpeed(Dev(w).Tier)));
+        }
+
         private static Device Dev(Wallet w)
         {
             if (!Devices.TryGetValue(w.Address, out var dev)) Devices[w.Address] = dev = new Device { Address = w.Address };
@@ -614,16 +621,17 @@ namespace Decentralized
         }
 
         private void Update() { Log.Guard("钱包动画", WalletWindow.Tick); Log.Guard("出金动画", Funds.Tick); }
+        private void LateUpdate() => Log.Guard("终端刷新", TerminalWindow.Flush);
     }
 
     /// <summary>✓ 键上的按住计时：按满 1.2 秒签名，鼠标挪开或松手就重来。进度用游戏自带的按住圆环显示。</summary>
     public sealed class HoldToSign : MonoBehaviour, IPointerDownHandler, IPointerUpHandler, IPointerExitHandler
     {
-        private const float Seconds = 1.2f;
+        private float Seconds = (float)Tuning.TxHoldSecs;
         private float held = -1f;
         public string Device;
 
-        public void OnPointerDown(PointerEventData e) => held = 0f;
+        public void OnPointerDown(PointerEventData e) { Seconds = WalletWindow.HoldSecs(Device); held = 0f; }
         public void OnPointerUp(PointerEventData e) => Stop();
         public void OnPointerExit(PointerEventData e) => Stop();