Playwright 제거 → DuckDuckGo HTML 검색 전환 + UI 미세 조정

- 테이블링/캐치테이블 검색: Google+Playwright → DuckDuckGo HTML 파싱 (브라우저 불필요)
- 검색 딜레이 5~15초 → 2~5초로 단축
- 프론트엔드: 정보 텍스트 계층 개선 (폰트 크기/색상 조정)

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

frontend/src/components/RestaurantList.tsx

@@ -45,7 +45,7 @@ export default function RestaurantList({
           }`}
         >
           <div className="flex items-start justify-between gap-2">
-            <h4 className="font-semibold text-sm text-gray-900 dark:text-gray-100">
+            <h4 className="font-bold text-[15px] text-gray-900 dark:text-gray-100">
               <Icon name={getCuisineIcon(r.cuisine_type)} size={16} className="mr-0.5 text-brand-600" />
               {r.name}
             </h4>
@@ -64,7 +64,7 @@ export default function RestaurantList({
             )}
           </div>
           {r.region && (
-            <p className="mt-1 text-xs text-gray-500 dark:text-gray-500 truncate">{r.region}</p>
+            <p className="mt-1 text-[11px] text-gray-400 dark:text-gray-500 truncate">{r.region}</p>
           )}
           {r.foods_mentioned && r.foods_mentioned.length > 0 && (
             <div className="flex flex-wrap gap-1 mt-1.5">