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

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

lib/instance/instance_live_pnl_lib.py

@@ -110,3 +110,18 @@ def resolve_instance_unrealized_pnl(
     if active_rows and get_metrics_fn:
         return sum_unrealized_pnl_from_metrics(active_rows, get_metrics_fn)
     return None
+
+
+def merge_unrealized_pnl_components(*parts: float | None) -> float | None:
+    """合并永续与期权等多路未实现盈亏（任一路有值即参与合计）。"""
+    total = 0.0
+    found = False
+    for part in parts:
+        if part is None:
+            continue
+        try:
+            total += float(part)
+            found = True
+        except (TypeError, ValueError):
+            continue
+    return round(total, 2) if found else None