移除交易功能

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

serve/frontend/src/components/Layout.tsx

@@ -30,7 +30,6 @@ import {
   Sparkles,
   Layers3,
   Landmark,
-  Cable,
   RadioTower,
   CheckCircle2,
   BookOpenCheck,
@@ -54,7 +53,6 @@ const nav = [
   { to: '/monitor', label: '监控中心', icon: RadioTower },
   { to: '/review',      label: '复盘',   icon: BookOpenCheck },
   { to: '/indices', label: '指数', icon: BarChart3 },
-  { to: '/trading', label: '交易', icon: Cable },
   { to: '/data',       label: '数据',   icon: Database },
 ] as const