新增 OffsetMakerEngine 和 OffsetMakerApp，支持根据盘口深度自动偏移挂单并在极端不平衡时撤退；更新 MakerEngine，优化撤单逻辑以清理已成交的挂单。

src/ui/App.tsx

@@ -2,9 +2,10 @@ import React, { useState } from "react";
 import { Box, Text, useInput } from "ink";
 import { TrendApp } from "./TrendApp";
 import { MakerApp } from "./MakerApp";
+import { OffsetMakerApp } from "./OffsetMakerApp";
 
 interface StrategyOption {
-  id: "trend" | "maker";
+  id: "trend" | "maker" | "offset-maker";
   label: string;
   description: string;
   component: React.ComponentType<{ onExit: () => void }>;
@@ -23,6 +24,12 @@ const STRATEGIES: StrategyOption[] = [
     description: "双边挂单提供流动性，自动追价与风控止损",
     component: MakerApp,
   },
+  {
+    id: "offset-maker",
+    label: "偏移做市策略",
+    description: "根据盘口深度自动偏移挂单并在极端不平衡时撤退",
+    component: OffsetMakerApp,
+  },
 ];
 
 const inputSupported = Boolean(process.stdin && (process.stdin as any).isTTY);