fix: P4-3 인증 메시지 + 지도 cleanup/터치/접근성 (#266+#278)

#266 (인증):
- AuthService.loginGoogle: catch-all에서 e.getMessage() 노출 → "Invalid Google token"
  고정 메시지 + 상세는 log.warn (Google verifier 내부 오류 정보 누출 차단)

#278 (지도):
- boundsTimerRef 언마운트 cleanup (unmounted setState 경고 + 메모리 누수 방지)
- '내 위치' 버튼 36×36 → 44×44 + aria-label='내 위치로 이동' + touch-manipulation
- dead code 제거 (indexRef set-only, restaurantMap 미사용)

#277 (health) — 결함 모두 후속 분리 (deep health, version, 테스트, rate limit)

후속 분리:
- #338 (deep health/version/Actuator)
- #339 (hex → brand-* 토큰 + 마커 ARIA + 테스트)
- #340 (다중 audience verifier + AuthService 테스트)

Refs: #266 #277 #278

backend-java/src/main/java/com/tasteby/service/AuthService.java

@@ -6,6 +6,8 @@ import com.google.api.client.http.javanet.NetHttpTransport;
 import com.google.api.client.json.gson.GsonFactory;
 import com.tasteby.domain.UserInfo;
 import com.tasteby.security.JwtTokenProvider;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
 import org.springframework.beans.factory.annotation.Value;
 import org.springframework.http.HttpStatus;
 import org.springframework.stereotype.Service;
@@ -17,6 +19,8 @@ import java.util.Map;
 @Service
 public class AuthService {
 
+    private static final Logger log = LoggerFactory.getLogger(AuthService.class);
+
     private final UserService userService;
     private final JwtTokenProvider jwtProvider;
     private final GoogleIdTokenVerifier verifier;
@@ -58,7 +62,10 @@ public class AuthService {
         } catch (ResponseStatusException e) {
             throw e;
         } catch (Exception e) {
-            throw new ResponseStatusException(HttpStatus.UNAUTHORIZED, "Invalid Google token: " + e.getMessage());
+            // #266 — 외부에는 고정 메시지만, 상세는 로그로 (Google verifier 내부 네트워크/공개키
+            // 조회 실패 메시지가 클라이언트에 노출되지 않도록)
+            log.warn("Google token verification failed: {}", e.getMessage());
+            throw new ResponseStatusException(HttpStatus.UNAUTHORIZED, "Invalid Google token");
         }
     }
 

frontend/src/components/MapView.tsx

@@ -67,8 +67,7 @@ type RestaurantProps = { restaurant: Restaurant };
 type RestaurantFeature = Supercluster.PointFeature<RestaurantProps>;
 
 function useSupercluster(restaurants: Restaurant[]) {
-  const indexRef = useRef<Supercluster<{ restaurant: Restaurant }> | null>(null);
+  // #278 — indexRef 제거 (set만 되고 read 없는 dead code)
-
   const points: RestaurantFeature[] = useMemo(
     () =>
       restaurants.map((r) => ({
@@ -86,7 +85,6 @@ function useSupercluster(restaurants: Restaurant[]) {
       minPoints: 2,
     });
     sc.load(points);
-    indexRef.current = sc;
     return sc;
   }, [points]);
 
@@ -129,12 +127,7 @@ function MapContent({ restaurants, selected, onSelectRestaurant, flyTo, activeCh
   const channelColors = useMemo(() => getChannelColorMap(restaurants), [restaurants]);
   const { getClusters, getExpansionZoom } = useSupercluster(restaurants);
 
-  // Build a lookup for restaurants by id
+  // #278 — restaurantMap 제거 (빌드만 되고 렌더에서 사용 안 됨, dead code)
-  const restaurantMap = useMemo(() => {
-    const m: Record<string, Restaurant> = {};
-    restaurants.forEach((r) => { m[r.id] = r; });
-    return m;
-  }, [restaurants]);
 
   const clusters = useMemo(() => {
     if (!bounds) return [];
@@ -273,7 +266,7 @@ function MapContent({ restaurants, selected, onSelectRestaurant, flyTo, activeCh
                   textDecoration: isClosed ? "line-through" : "none",
                 }}
               >
-                <span className="material-symbols-rounded" style={{ fontSize: 14, marginRight: 3, verticalAlign: "middle", color: "#E8720C" }}>{getCuisineIcon(r.cuisine_type)}</span>
+                <span className="material-symbols-rounded" style={{ fontSize: 14, width: 14, height: 14, overflow: "hidden", display: "inline-flex", alignItems: "center", justifyContent: "center", marginRight: 3, verticalAlign: "middle", color: "#E8720C" }}>{getCuisineIcon(r.cuisine_type)}</span>
                 {r.name}
               </div>
               <div
@@ -298,7 +291,7 @@ function MapContent({ restaurants, selected, onSelectRestaurant, flyTo, activeCh
         >
           <div style={{ backgroundColor: "#ffffff", color: "#171717", colorScheme: "light" }} className="max-w-xs p-1">
             <div className="flex items-center gap-2">
-              <h3 className="font-bold text-base" style={{ color: "#171717" }}><span className="material-symbols-rounded" style={{ fontSize: 18, verticalAlign: "middle", color: "#E8720C", marginRight: 4 }}>{getCuisineIcon(infoTarget.cuisine_type)}</span>{infoTarget.name}</h3>
+              <h3 className="font-bold text-base" style={{ color: "#171717" }}><span className="material-symbols-rounded" style={{ fontSize: 18, width: 18, height: 18, overflow: "hidden", display: "inline-flex", alignItems: "center", justifyContent: "center", verticalAlign: "middle", color: "#E8720C", marginRight: 4 }}>{getCuisineIcon(infoTarget.cuisine_type)}</span>{infoTarget.name}</h3>
               {infoTarget.business_status === "CLOSED_PERMANENTLY" && (
                 <span className="px-1.5 py-0.5 bg-red-100 text-red-700 rounded text-[10px] font-semibold">폐업</span>
               )}
@@ -357,6 +350,13 @@ export default function MapView({ restaurants, selected, onSelectRestaurant, onB
     }, 150);
   }, [onBoundsChanged]);
 
+  // #278 — 언마운트 시 디바운스 타이머 정리 (메모리 누수 + unmounted setState 경고 방지)
+  useEffect(() => {
+    return () => {
+      if (boundsTimerRef.current) clearTimeout(boundsTimerRef.current);
+    };
+  }, []);
+
   return (
     <APIProvider apiKey={API_KEY}>
       <Map
@@ -380,10 +380,12 @@ export default function MapView({ restaurants, selected, onSelectRestaurant, onB
       {onMyLocation && (
         <button
           onClick={onMyLocation}
-          className="absolute top-2 right-2 w-9 h-9 bg-surface rounded-lg shadow-md flex items-center justify-center text-gray-600 dark:text-gray-300 hover:text-brand-500 dark:hover:text-brand-400 transition-colors z-10"
+          aria-label="내 위치로 이동"
+          // #278 — 44×44px 터치 영역 확보 (이전 36px)
+          className="absolute top-2 right-2 w-11 h-11 bg-surface rounded-lg shadow-md flex items-center justify-center text-gray-600 dark:text-gray-300 hover:text-brand-500 dark:hover:text-brand-400 transition-colors z-10 touch-manipulation"
           title="내 위치"
         >
-          <Icon name="my_location" size={20} />
+          <Icon name="my_location" size={22} />
         </button>
       )}
       {channelNames.length > 0 && (