feat: align UI routes and menu with implemented screens

frontend/src/App.vue

@@ -4,7 +4,11 @@ import { AppShellLayout } from './shared/ui/layouts'
 </script>
 <template>
   <AppShellLayout>
-    <template #navigation><nav class="app-nav"><RouterLink to="/research/sell-decision">매도 의사결정</RouterLink><RouterLink to="/ops/data-quality">데이터 품질</RouterLink><RouterLink to="/ops/model-operations">모델 운영</RouterLink><RouterLink to="/internal/ui-standard">표준 UI 패턴</RouterLink></nav></template>
+    <template #navigation><nav class="app-nav" aria-label="주요 메뉴">
+      <section><h2>Research</h2><RouterLink to="/research/sell-decision">매도 의사결정</RouterLink></section>
+      <section><h2>Portfolio</h2><RouterLink to="/portfolio/risk">포트폴리오 리스크</RouterLink><RouterLink to="/portfolio/rebalance">리밸런싱 제안</RouterLink></section>
+      <section><h2>Operations</h2><RouterLink to="/ops/data-quality">데이터 품질</RouterLink><RouterLink to="/ops/market-data-ingestion">시장 데이터 수집</RouterLink><RouterLink to="/ops/market-data-history">수집 이력</RouterLink><RouterLink to="/ops/model-operations">모델 운영</RouterLink></section>
+    </nav></template>
     <RouterView />
   </AppShellLayout>
 </template>