Fix OKX abandon residual double-book and fill/residual ledger holes.

After dual-close leaves option pending, continue close_group instead of false residual; reject partial fills on wait timeout; LIVE residual settle allow_negative.

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

backend/app/live/okx_trade.py

@@ -191,15 +191,13 @@ class OkxTradeClient:
                 if state in ("canceled", "failed"):
                     raise RuntimeError(f"OKX 订单失败 state={state} {last}")
             time.sleep(0.3)
-        # 超时兜底：已 filled 或已有成交量+均价则回填，避免「有仓无账」
+        # 超时兜底：仅接受完全成交；部分成交不得当全成记账（会错张数/对冲）
         state = str(last.get("state") or "")
         avg = safe_float(last.get("avgPx"))
-        acc = safe_float(last.get("accFillSz")) or 0.0
-        if state == "filled" or (acc > 0 and avg and avg > 0):
+        if state == "filled" and avg and avg > 0:
             logger.warning(
-                "OKX fill wait timeout but using last fill data ordId=%s state=%s",
+                "OKX fill wait timeout but order filled ordId=%s",
                 ord_id,
-                state,
             )
             return self._fill_from_order_row(inst_id, ord_id, last)
         raise RuntimeError(f"OKX 订单未完全成交 ordId={ord_id} last={last}")