feat: add leader rating song recommendations

offline/OfflineApp.svelte

@@ -4,6 +4,7 @@
   import HomePage from '../src/routes/+page.svelte';
   import CardsPage from '../src/routes/cards/+page.svelte';
   import AnalysisPage from '../src/routes/analysis/+page.svelte';
+  import RatingPage from '../src/routes/rating/+page.svelte';
   import CombinationPage from '../src/routes/combination/+page.svelte';
   import EventPage from '../src/routes/event/+page.svelte';
   import DataPage from '../src/routes/data/+page.svelte';
@@ -18,6 +19,7 @@
     ['/', HomePage],
     ['/cards', CardsPage],
     ['/analysis', AnalysisPage],
+    ['/rating', RatingPage],
     ['/combination', CombinationPage],
     ['/event', EventPage],
     ['/data', DataPage],
@@ -78,6 +80,7 @@
     <nav aria-label="주요 메뉴">
       <a href="#/cards" aria-current={currentPath.startsWith('/cards') ? 'page' : undefined}>카드 목록</a>
       <a href="#/analysis" aria-current={currentPath.startsWith('/analysis') ? 'page' : undefined}>배치 분석</a>
+      <a href="#/rating" aria-current={currentPath.startsWith('/rating') ? 'page' : undefined}>리더 레이팅</a>
       <a href="#/combination" aria-current={currentPath.startsWith('/combination') ? 'page' : undefined}>조합 탐색</a>
       {#if showEventTab}<a href="#/event" aria-current={currentPath.startsWith('/event') ? 'page' : undefined}>이벤트 Pt</a>{/if}
       <a href="#/data" aria-current={currentPath.startsWith('/data') ? 'page' : undefined}>사용자 데이터</a>