统计已实现盈亏扣手续费，并按平仓时指数冻结为 U。

Co-authored-by: Cursor <cursoragent@cursor.com>

lib/exchange/okx_options_lib.py

@@ -1147,6 +1147,8 @@ def fetch_option_order(ex: ccxt.okx, *, inst_id: str, ord_id: str) -> dict[str,
         if avg is None or avg <= 0:
             avg = fill_px
         state = str(o.get("state") or "").strip().lower()
+        fee = _safe_float(o.get("fee"))
+        fee_ccy = str(o.get("feeCcy") or o.get("fee_ccy") or "").strip().upper()
         return {
             "ok": True,
             "ord_id": str(o.get("ordId") or ord_id),
@@ -1157,6 +1159,9 @@ def fetch_option_order(ex: ccxt.okx, *, inst_id: str, ord_id: str) -> dict[str,
             "avg_px": avg,
             "side": str(o.get("side") or "").lower(),
             "ord_type": str(o.get("ordType") or ""),
+            # OKX fee 扣费多为负;此处保留原始值,结算侧取绝对值
+            "fee": fee,
+            "fee_ccy": fee_ccy,
             "raw": o,
         }
     except Exception as e: