Constrain funds bar width and fold strategy rules.

Match page max-width on ultrawide and move the plan subtitle into a collapsible rules section under the funds strip.

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

frontend/src/pages/Plan.tsx

@@ -167,14 +167,6 @@ export default function PlanPage() {
     <div className="plan-page">
       <div className="plan-desktop-head">
         <h2 style={{ marginTop: 0 }}>自动对冲计划</h2>
-        <p style={{ color: "var(--muted)", marginTop: -8 }}>
-          行情 {(snap?.exchange || "okx").toUpperCase()}
-          {snap?.perp_inst_id ? ` · ${snap.perp_inst_id}` : ""} ·
-          目标平仓(双腿/远虚只平永续) · 未达标则到期结算
-          {plan?.mode === "LIVE" && plan.live_ready === false
-            ? ` · 未就绪: ${plan.live_ready_reason || "请配置 API"}`
-            : ""}
-        </p>
       </div>
 
       {/* 手机端一屏监控卡：状态 / 净利 / 倒计时 */}