Show options budget buffer ratio in open-order rule tip.

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

lib/options/options_register.py

@@ -373,6 +373,7 @@ def register_options_routes(app: Flask, cfg: dict[str, Any]) -> None:
         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)
+        budget_buffer = _env_float("OKX_OPTIONS_BUDGET_BUFFER", 0.95)
         if not expiries:
             return jsonify(
                 {
@@ -381,6 +382,8 @@ def register_options_routes(app: Flask, cfg: dict[str, Any]) -> None:
                     **chain,
                     "chain_max_dte_days": cfg["chain_max_dte_days"],
                     "ask_liq_filter_enabled": ask_liq_filter,
+                    "budget_buffer": budget_buffer,
+                    "trade_budget": cfg["trade_budget"],
                 }
             )
         return jsonify(
@@ -389,6 +392,8 @@ def register_options_routes(app: Flask, cfg: dict[str, Any]) -> None:
                 **chain,
                 "chain_max_dte_days": cfg["chain_max_dte_days"],
                 "ask_liq_filter_enabled": ask_liq_filter,
+                "budget_buffer": budget_buffer,
+                "trade_budget": cfg["trade_budget"],
             }
         )