Show live risk-sizing estimate on plan page instead of stale manual qty.

When 以损定仓 is on, state() overlays next-open k/qty/exit from market preview.

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

backend/app/strategy/engine.py

@@ -128,6 +128,32 @@ class StrategyEngine:
         risk_option_unit = self.ledger.get_setting_float("risk_option_unit", 2.0)
         risk_exit_unit = self.ledger.get_setting_float("risk_exit_unit", 15.0)
         risk_last_k = self.ledger.get_setting_float("risk_last_k", 0.0)
+        risk_preview: dict[str, Any] | None = None
+        # 以损定仓：监控页展示「下一次开仓」实时估算，避免仍显示上次手填/过期名义
+        if sizing_mode == "risk_based":
+            try:
+                from .risk_sizing import preview_risk_sizing
+
+                risk_preview = preview_risk_sizing(self.db)
+                if risk_preview.get("ok"):
+                    if risk_preview.get("perp_qty_eth") is not None:
+                        perp_qty = float(risk_preview["perp_qty_eth"])
+                    if risk_preview.get("option_qty_eth") is not None:
+                        opt_qty = float(risk_preview["option_qty_eth"])
+                    if risk_preview.get("net_profit_target") is not None:
+                        net_target = float(risk_preview["net_profit_target"])
+                        exit_amt = net_target
+                    if risk_preview.get("k") is not None:
+                        risk_last_k = float(risk_preview["k"])
+                    if risk_preview.get("perp_unit") is not None:
+                        risk_perp_unit = float(risk_preview["perp_unit"])
+                    if risk_preview.get("option_unit") is not None:
+                        risk_option_unit = float(risk_preview["option_unit"])
+                    if risk_preview.get("exit_unit") is not None:
+                        risk_exit_unit = float(risk_preview["exit_unit"])
+            except Exception:
+                logger.exception("risk sizing preview for state() failed")
+                risk_preview = {"ok": False, "detail": "以损定仓预览失败"}
         rest_until = row["rest_until_ms"]
         rest_left = 0
         if rest_until:
@@ -172,6 +198,7 @@ class StrategyEngine:
             "risk_option_unit": risk_option_unit,
             "risk_exit_unit": risk_exit_unit,
             "risk_last_k": risk_last_k if risk_last_k > 0 else None,
+            "risk_sizing_preview": risk_preview,
             "min_option_hours": min_hours,
             "min_option_leverage": min_opt_lev,
             "atm_open_offset_enabled": atm_off_on,