Add Binance live trading, anti-stuck open/close recovery, and configurable rate limits.

OKX/Binance LIVE share half_open and option_closed_perp_pending repair paths; private REST throttles default to 1s and are tunable in settings.

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

frontend/src/api/client.ts

@@ -203,6 +203,7 @@ export type StrategySettings = {
   net_profit_target: number;
   premium_exit_multiple: number;
   rest_seconds: number;
+  live_order_interval_sec?: number;
   skip_weekends: boolean;
   initial_equity: number;
   leverage: number;

frontend/src/pages/Settings.tsx

@@ -28,6 +28,7 @@ export default function SettingsPage() {
   const [netTarget, setNetTarget] = useState(15);
   const [premMult, setPremMult] = useState(1);
   const [rest, setRest] = useState(300);
+  const [orderInterval, setOrderInterval] = useState(1);
   const [skipWeekends, setSkipWeekends] = useState(true);
   const [leverage, setLeverage] = useState(3);
   const [minHours, setMinHours] = useState(12);
@@ -67,6 +68,7 @@ export default function SettingsPage() {
         setNetTarget(s.net_profit_target ?? 15);
         setPremMult(s.premium_exit_multiple ?? 1);
         setRest(s.rest_seconds);
+        setOrderInterval(s.live_order_interval_sec ?? 1);
         setSkipWeekends(s.skip_weekends !== false);
         setLeverage(s.leverage ?? 3);
         setMinHours(s.min_option_hours ?? 12);
@@ -127,6 +129,7 @@ export default function SettingsPage() {
           net_profit_target: netTarget,
           premium_exit_multiple: premMult,
           rest_seconds: rest,
+          live_order_interval_sec: orderInterval,
           skip_weekends: skipWeekends,
           leverage,
           min_option_hours: minHours,
@@ -446,6 +449,23 @@ export default function SettingsPage() {
                     onChange={(e) => setRest(Number(e.target.value))}
                   />
                 </div>
+                <div className="field">
+                  <label htmlFor="orderInterval">实盘下单最小间隔（秒）</label>
+                  <input
+                    id="orderInterval"
+                    className="mono"
+                    type="number"
+                    step="0.1"
+                    min="0.2"
+                    max="30"
+                    value={orderInterval}
+                    onChange={(e) => setOrderInterval(Number(e.target.value))}
+                  />
+                  <p className="settings-hint">
+                    LIVE 私有下单/查单间隔，默认 1s（非高频建议 ≥1）。范围
+                    0.2–30。保存后立即生效。
+                  </p>
+                </div>
                 <div className="field">
                   <label htmlFor="skipWe">周六日跳过开仓（上海时区）</label>
                   <select
@@ -484,8 +504,8 @@ export default function SettingsPage() {
       {tab === "runtime" ? (
         <div className="card settings-card">
           <p className="settings-lead">
-            SIM = 本地撮合；LIVE = 交易所真下单（当前 OKX 已接，币安仅存密钥）。密钥只写入服务器{" "}
-            <span className="mono">.env</span>，接口不回传明文。
+            SIM = 本地撮合；LIVE = 当前所选交易所真下单（OKX / 币安均已接入）。密钥只写入服务器{" "}
+            <span className="mono">.env</span>，接口不回传明文。OKX 期权常需账户有 USDC；币安多为 USDT。
           </p>
           {runtimeOk ? <div className="settings-ok">{runtimeOk}</div> : null}
           {err && tab === "runtime" ? <div className="err">{err}</div> : null}
@@ -574,7 +594,7 @@ export default function SettingsPage() {
             </section>
 
             <section className="settings-section">
-              <h3>币安 API（仅落盘）</h3>
+              <h3>币安 API</h3>
               <div className="settings-fields">
                 <div className="field">
                   <label htmlFor="bnKey">API Key</label>
@@ -608,7 +628,10 @@ export default function SettingsPage() {
                     onChange={(e) => setBnSecret(e.target.value)}
                   />
                 </div>
-                <p className="settings-hint">留空保存=不覆盖已有密钥。币安真下单后续接入。</p>
+                <p className="settings-hint">
+                  留空保存=不覆盖已有密钥。交易所选币安且 LIVE 时用此密钥真下单（无
+                  Passphrase）。
+                </p>
               </div>
             </section>