Options: default nearest expiry and env ask-liquidity chain filter.

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

lib/options/options_register.py

@@ -108,6 +108,7 @@ def _build_cfg(app_module: Any) -> dict[str, Any]:
         "default_underly": (os.getenv("OKX_OPTIONS_DEFAULT_UNDERLY") or "ETH").strip().upper(),
         "max_dte_days": _env_float("OKX_OPTIONS_MAX_DTE_DAYS", 2.0),
         "chain_max_dte_days": _env_float("OKX_OPTIONS_CHAIN_MAX_DTE_DAYS", 14.0),
+        "chain_ask_liq_filter": _env_bool("OKX_OPTIONS_CHAIN_ASK_LIQ_FILTER_ENABLED", True),
         "itm_max_dist": _env_float("OKX_OPTIONS_ITM_MAX_DIST_USD", 30.0),
         "td_mode": (os.getenv("OKX_OPTIONS_TD_MODE") or "isolated").strip(),
         # 市价平仓已硬关闭(忽略 env),仅买一限价
@@ -370,6 +371,8 @@ def register_options_routes(app: Flask, cfg: dict[str, Any]) -> None:
             return jsonify({"ok": False, "msg": f"加载期权链失败: {e}"})
         expiries = chain.get("expiries") or []
         chain_err = chain.get("chain_error")
+        # 热更新:每次读 env,保存配置后刷新链即可生效
+        ask_liq_filter = _env_bool("OKX_OPTIONS_CHAIN_ASK_LIQ_FILTER_ENABLED", True)
         if not expiries:
             return jsonify(
                 {
@@ -377,9 +380,17 @@ def register_options_routes(app: Flask, cfg: dict[str, Any]) -> None:
                     "msg": chain_err or "暂无到期日,请稍后点「刷新链」",
                     **chain,
                     "chain_max_dte_days": cfg["chain_max_dte_days"],
+                    "ask_liq_filter_enabled": ask_liq_filter,
                 }
             )
-        return jsonify({"ok": True, **chain, "chain_max_dte_days": cfg["chain_max_dte_days"]})
+        return jsonify(
+            {
+                "ok": True,
+                **chain,
+                "chain_max_dte_days": cfg["chain_max_dte_days"],
+                "ask_liq_filter_enabled": ask_liq_filter,
+            }
+        )
 
     @app.route("/api/options/quote")
     @lr