更新 MakerEngine、OffsetMakerEngine 和 TrendEngine，重构订单同步逻辑，优化撤单和止损判断，新增订单计划生成和安全撤单功能，提升代码可读性和维护性。

src/utils/risk.ts

@@ -0,0 +1,26 @@
+import type { PositionSnapshot } from "./strategy";
+
+export function shouldStopLoss(
+  position: PositionSnapshot,
+  bestBid: number,
+  bestAsk: number,
+  lossLimit: number
+): boolean {
+  const absPosition = Math.abs(position.positionAmt);
+  if (absPosition < 1e-5) return false;
+
+  const pnl = position.positionAmt > 0
+    ? (bestBid - position.entryPrice) * absPosition
+    : (position.entryPrice - bestAsk) * absPosition;
+
+  const unrealized = Number.isFinite(position.unrealizedProfit)
+    ? (position.unrealizedProfit as number)
+    : null;
+
+  const derivedLoss = pnl < -lossLimit;
+  const snapshotLoss = Boolean(unrealized != null && unrealized < -lossLimit && pnl <= 0);
+
+  return derivedLoss || snapshotLoss;
+}
+
+