Add food tag remap feature and show menu tags in restaurant cards

- LLM extraction prompt: foods_mentioned max 10, Korean only, prioritized
- New /remap-foods API endpoint for bulk LLM re-extraction
- Admin UI: "메뉴태그 재생성" button with SSE progress bar
- Backend: attach foods_mentioned to restaurant list API response
- Restaurant cards: display food tags (orange, max 5 visible)

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

frontend/src/lib/api.ts

@@ -48,6 +48,7 @@ export interface Restaurant {
   phone: string | null;
   website: string | null;
   channels?: string[];
+  foods_mentioned?: string[];
 }
 
 export interface VideoLink {