fix期权下单默认按可用余额打满；持仓上限/缓冲/门控秒数默认值调整。

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

lib/options/options_register.py

@@ -110,7 +110,7 @@ def _build_cfg(app_module: Any) -> dict[str, Any]:
         "send_wechat": app_module.send_wechat_msg,
         "render_main_page": app_module.render_main_page,
         "trade_budget": _env_float("OKX_OPTIONS_TRADE_BUDGET_USDC", 10.0),
-        "budget_buffer": _env_float("OKX_OPTIONS_BUDGET_BUFFER", 0.95),
+        "budget_buffer": _env_float("OKX_OPTIONS_BUDGET_BUFFER", 1.0),
         "compound_full_enabled": _env_bool("OKX_OPTIONS_COMPOUND_FULL_ENABLED", True),
         "compound_full_cap_enabled": _env_bool("OKX_OPTIONS_COMPOUND_FULL_CAP_ENABLED", False),
         "compound_full_cap_usdc": _env_float("OKX_OPTIONS_COMPOUND_FULL_CAP_USDC", 300.0),
@@ -535,7 +535,7 @@ 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)
+        budget_buffer = _env_float("OKX_OPTIONS_BUDGET_BUFFER", 1.0)
         coin_budget = None
         try:
             from lib.options.options_margin_mode_lib import is_coin_margin_mode