Recover stuck opening and harden LIVE open/close reconcile.

Stamp open intent, recover opening from exchange option/perp state, skip resell/reopen when already flat, and persist Binance margin mode.

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

backend/app/live/okx_trade.py

@@ -265,6 +265,35 @@ class OkxTradeClient:
             return abs(float(pos))
         return 0.0
 
+    def get_option_pos_sz(self, inst_id: str) -> float | None:
+        """期权绝对持仓张数。"""
+        try:
+            rows = self._request(
+                "GET",
+                f"/api/v5/account/positions?instType=OPTION&instId={inst_id}",
+            )
+        except Exception as e:
+            logger.warning("okx get_option_pos_sz failed: %s", e)
+            return None
+        total = 0.0
+        for row in rows:
+            pos = safe_float(row.get("pos")) or 0.0
+            total += abs(float(pos))
+        return total
+
+    def any_option_pos_abs(self) -> float | None:
+        """账户任意期权绝对持仓张数合计。"""
+        try:
+            rows = self._request("GET", "/api/v5/account/positions?instType=OPTION")
+        except Exception as e:
+            logger.warning("okx any_option_pos_abs failed: %s", e)
+            return None
+        total = 0.0
+        for row in rows:
+            pos = safe_float(row.get("pos")) or 0.0
+            total += abs(float(pos))
+        return total
+
     def set_leverage(
         self,
         inst_id: str,