Treat option-option amplitude as a maximum cap.

Reject opens when range exceeds the setting; update UI and docs labels.

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

frontend/src/api/client.ts

@@ -211,6 +211,8 @@ export type MarketSnapshot = {
     mid?: number;
     range_pct?: number;
     hours?: number;
+    max_pct?: number;
+    /** @deprecated 兼容旧字段，等同 max_pct */
     min_pct?: number;
     ok?: boolean;
   } | null;

frontend/src/pages/Plan.tsx

@@ -261,7 +261,7 @@ export default function PlanPage() {
       ? `ATM偏差≤${fmt(plan?.max_atm_open_offset ?? 3, 0)}`
       : "ATM偏差关";
   const ooSelectLabel = [
-    `振幅≥${fmt(plan?.oo_amplitude_pct ?? 1.5, 1)}%/${fmt(plan?.oo_amplitude_hours ?? 12, 0)}h`,
+    `振幅≤${fmt(plan?.oo_amplitude_pct ?? 1.5, 1)}%/${fmt(plan?.oo_amplitude_hours ?? 12, 0)}h`,
     "虚值Call@高·Put@低",
     `剩余≥${fmt(plan?.oo_min_option_hours ?? 24, 0)}h`,
     `杠杆≥${fmt(plan?.oo_min_leverage ?? 200, 0)}x`,
@@ -897,13 +897,20 @@ export default function PlanPage() {
                   {snap?.oo_amplitude?.range_pct != null
                     ? `${fmt(snap.oo_amplitude.range_pct, 2)}%`
                     : "—"}
-                  {snap?.oo_amplitude?.min_pct != null
-                    ? ` · 门限≥${fmt(snap.oo_amplitude.min_pct, 1)}%`
+                  {(snap?.oo_amplitude?.max_pct ?? snap?.oo_amplitude?.min_pct) !=
+                  null
+                    ? ` · 上限≤${fmt(
+                        Number(
+                          snap.oo_amplitude?.max_pct ??
+                            snap.oo_amplitude?.min_pct,
+                        ),
+                        1,
+                      )}%`
                     : ""}
                   {snap?.oo_amplitude?.ok === false
-                    ? " · 不足"
+                    ? " · 超限"
                     : snap?.oo_amplitude?.ok === true
-                      ? " · 达标"
+                      ? " · 可开"
                       : ""}
                 </span>
               </div>

frontend/src/pages/Settings.tsx

@@ -1220,7 +1220,7 @@ export default function SettingsPage() {
                   {isOo ? (
                     <>
                       <div className="field">
-                        <label htmlFor="ooAmp">振幅最小（%）</label>
+                        <label htmlFor="ooAmp">振幅最大（%）</label>
                         <input
                           id="ooAmp"
                           className="mono"
@@ -1230,6 +1230,9 @@ export default function SettingsPage() {
                           value={ooAmpPct}
                           onChange={(e) => setOoAmpPct(Number(e.target.value))}
                         />
+                        <p className="hint" style={{ margin: "0.35rem 0 0" }}>
+                          回看窗内振幅超过该上限则不开仓。
+                        </p>
                       </div>
                       <div className="field">
                         <label htmlFor="ooAmpH">振幅回看（小时）</label>
@@ -1622,7 +1625,7 @@ export default function SettingsPage() {
                 {stratSub === "select" ? (
                   isOo ? (
                     <li>
-                      期期选约：回看窗内真实高低点振幅达标后，同到期虚值 Call
+                      期期选约：回看窗内真实高低点振幅不超过上限后，同到期虚值 Call
                       贴高、Put 贴低；剩余到期与单腿杠杆门限见本页。
                     </li>
                   ) : (