Fix strategy checklist hidden class so tabs do not stack.

Generic .hidden was missing display:none, so 执行清单 stayed visible beside 策略正文.

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

manual_trading_hub/static/app.css

@@ -392,6 +392,11 @@ button.ghost:hover:not(:disabled) {
   display: none;
 }
 
+/* 通用隐藏:策略正文/执行清单等 Tab 面板依赖此类互斥显示 */
+.hidden {
+  display: none !important;
+}
+
 .page-head {
   margin: 24px 0 16px;
 }

manual_trading_hub/static/index.html

@@ -15,7 +15,7 @@
   <link rel="preconnect" href="https://fonts.gstatic.com" crossorigin />
   <link href="https://fonts.googleapis.com/css2?family=JetBrains+Mono:wght@400;500;600&family=Orbitron:wght@500;600;700&display=swap" rel="stylesheet" media="print" onload="this.media='all'" />
   <noscript><link href="https://fonts.googleapis.com/css2?family=JetBrains+Mono:wght@400;500;600&family=Orbitron:wght@500;600;700&display=swap" rel="stylesheet" /></noscript>
-      <link rel="stylesheet" href="/assets/app.css?v=20260718-strategy-toc" />
+      <link rel="stylesheet" href="/assets/app.css?v=20260718-strategy-toc2" />
   <link rel="stylesheet" href="/assets/trade_stats_calendar.css?v=4" />
   <link rel="stylesheet" href="/assets/account_risk_badge.css?v=4" />
   <script src="/assets/account_risk_badge.js?v=4"></script>