Include options unrealized PnL in OKX instance header realtime PnL total.

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

lib/exchange/okx_options_lib.py

@@ -615,6 +615,19 @@ def fetch_option_positions(ex: ccxt.okx) -> list[dict[str, Any]]:
         return []
 
 
+def fetch_options_unrealized_pnl_usdc(ex: ccxt.okx) -> float | None:
+    """期权持仓未实现盈亏合计（USDC，统计口径与 USDT 1:1）。"""
+    total = 0.0
+    found = False
+    for pos in fetch_option_positions(ex):
+        upl = _safe_float(pos.get("upl"))
+        if upl is None:
+            continue
+        found = True
+        total += upl
+    return round(total, 4) if found else None
+
+
 def estimate_usdt_to_usdc(ex: ccxt.okx, usdt_amount: float) -> dict[str, Any]:
     if usdt_amount <= 0:
         return {"ok": False, "msg": "兑换数量须大于 0"}