Keep OO amplitude refreshed while holding a position.

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

backend/app/strategy/session.py

@@ -332,6 +332,8 @@ class StrategySession:
 
     def align_to_held_position(self) -> OptionPair | None:
         """有活跃仓时：监控对锁定为持仓合约的到期/行权价。"""
+        if _hedge_mode() == "option_option":
+            self.refresh_oo_amplitude()
         call_id, put_id = _held_option_legs()
         held = call_id or _held_option_inst_id()
         if not held:
@@ -441,11 +443,37 @@ class StrategySession:
             )
         return self._apply_pair(pair, mark=float(mark), idx=idx)
 
+    def refresh_oo_amplitude(self) -> dict[str, Any] | None:
+        """刷新振幅高低（有仓/无仓都要，否则持仓后 UI 指数/振幅会空）。"""
+        if _hedge_mode() != "option_option":
+            return None
+        try:
+            from ..exchange.candles import fetch_amplitude_hl_for_runtime
+
+            amp_pct, amp_hours, _, _ = _oo_settings()
+            amp = fetch_amplitude_hl_for_runtime(amp_hours)
+            if amp is None:
+                return self._oo_amp
+            self._oo_amp = {
+                "high": float(amp.high),
+                "low": float(amp.low),
+                "mid": float(amp.mid),
+                "range_pct": float(amp.range_pct),
+                "hours": float(amp_hours),
+                "max_pct": float(amp_pct),
+                "ok": float(amp.range_pct) <= float(amp_pct) + 1e-12,
+            }
+            return self._oo_amp
+        except Exception:
+            logger.exception("refresh_oo_amplitude failed")
+            return self._oo_amp
+
     def align_oo_instruments(self) -> OptionPair | None:
         """期期监控：按振幅高低点选虚值 Call/Put（展示用；振幅超限仍对齐候选）。"""
-        from ..exchange.candles import fetch_amplitude_hl_for_runtime
         from .oo_selection import select_oo_pair
 
+        # 有仓也刷新振幅（钉仓不再走选约，否则 _oo_amp 一直空）
+        self.refresh_oo_amplitude()
         if _has_open_position():
             return self.align_to_held_position()
         s = self.settings
@@ -455,26 +483,17 @@ class StrategySession:
         if mark is None or mark <= 0:
             raise RuntimeError("无法获取标的标记/指数价格，无法选期期虚值")
         underlying = float(mark)
-        amp = fetch_amplitude_hl_for_runtime(amp_hours)
-        if amp is None:
-            self._oo_amp = None
+        if self._oo_amp is None:
             raise RuntimeError("无法获取振幅 K 线高低点")
-        self._oo_amp = {
-            "high": float(amp.high),
-            "low": float(amp.low),
-            "mid": float(amp.mid),
-            "range_pct": float(amp.range_pct),
-            "hours": float(amp_hours),
-            "max_pct": float(amp_pct),
-            "ok": float(amp.range_pct) <= float(amp_pct) + 1e-12,
-        }
+        amp_high = float(self._oo_amp["high"])
+        amp_low = float(self._oo_amp["low"])
         contracts = self.ex.list_option_contracts(s.option_inst_family)
         skip = _skip_expiry_ymds_for_next()
         picked = select_oo_pair(
             contracts,
             spot=underlying,
-            high=float(amp.high),
-            low=float(amp.low),
+            high=amp_high,
+            low=amp_low,
             min_hours=float(min_hours),
             skip_expiry_ymds=skip,
         )
@@ -518,6 +537,16 @@ class StrategySession:
         if amp is None:
             logger.info("oo: amplitude candles unavailable")
             return None
+        # 无论是否超限都写入，供「指数/振幅」面板展示
+        self._oo_amp = {
+            "high": float(amp.high),
+            "low": float(amp.low),
+            "mid": float(amp.mid),
+            "range_pct": float(amp.range_pct),
+            "hours": float(amp_hours),
+            "max_pct": float(amp_pct),
+            "ok": float(amp.range_pct) <= float(amp_pct) + 1e-12,
+        }
         if float(amp.range_pct) > float(amp_pct) + 1e-12:
             logger.info(
                 "oo: amplitude %.3f%% > max %.3f%% (H=%.2f L=%.2f)",
@@ -862,7 +891,9 @@ class StrategySession:
 
     async def ensure_atm_async(self, *, force: bool = False) -> OptionPair | None:
         if _has_open_position():
-            # 持仓期间：钉住持仓行权价（禁止漂到新 ATM/虚值）
+            # 持仓期间：钉住持仓行权价（禁止漂到新 ATM/虚值）；期期仍刷新振幅供 UI
+            if _hedge_mode() == "option_option":
+                await asyncio.to_thread(self.refresh_oo_amplitude)
             call_id, put_id = _held_option_legs()
             held = call_id or _held_option_inst_id()
             if held and (