refactor(lightbox): MobileLightbox 공통 컴포넌트 분리

- MobileLightbox 컴포넌트 생성 (Swiper 기반 터치 스와이프)
  - 사진 정보 바텀시트 내장
  - 다운로드, 카운터, 비디오 지원
- Mobile AlbumDetail에서 MobileLightbox 사용 (-185줄)
- Mobile AlbumGallery에서 MobileLightbox 사용 (-188줄)
- 코드 중복 제거로 총 414줄 감소

라이트박스 컴포넌트 구조:
- Lightbox: PC용 (키보드/클릭 네비게이션)
- MobileLightbox: Mobile용 (Swiper 터치 스와이프)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

frontend-temp/src/components/common/MobileLightbox.jsx

@@ -0,0 +1,264 @@
+import { useState, useEffect, useCallback, useRef } from 'react';
+import { motion, AnimatePresence } from 'framer-motion';
+import { X, Download, Info, Users, Tag } from 'lucide-react';
+import { Swiper, SwiperSlide } from 'swiper/react';
+import { Virtual } from 'swiper/modules';
+import 'swiper/css';
+import LightboxIndicator from './LightboxIndicator';
+
+/**
+ * 모바일 라이트박스 공통 컴포넌트
+ * Swiper 기반 터치 스와이프 지원
+ *
+ * @param {string[]} images - 이미지/비디오 URL 배열
+ * @param {Object[]} photos - 메타데이터 포함 사진 배열 (선택적)
+ *   @param {string} photos[].concept - 컨셉 이름
+ *   @param {string} photos[].members - 멤버 이름 (쉼표 구분)
+ * @param {Object[]} teasers - 티저 정보 배열 (비디오 여부 확인용)
+ *   @param {string} teasers[].media_type - 'video' 또는 'image'
+ * @param {number} currentIndex - 현재 인덱스
+ * @param {boolean} isOpen - 열림 상태
+ * @param {function} onClose - 닫기 콜백
+ * @param {function} onIndexChange - 인덱스 변경 콜백
+ * @param {boolean} showCounter - 카운터 표시 여부 (기본: true)
+ * @param {boolean} showDownload - 다운로드 버튼 표시 여부 (기본: true)
+ * @param {string} downloadPrefix - 다운로드 파일명 접두사 (기본: 'fromis9_photo')
+ */
+function MobileLightbox({
+  images,
+  photos,
+  teasers,
+  currentIndex,
+  isOpen,
+  onClose,
+  onIndexChange,
+  showCounter = true,
+  showDownload = true,
+  downloadPrefix = 'fromis9_photo',
+}) {
+  const [showInfo, setShowInfo] = useState(false);
+  const swiperRef = useRef(null);
+
+  // 현재 사진 정보
+  const currentPhoto = photos?.[currentIndex];
+  const concept = currentPhoto?.concept || currentPhoto?.title;
+  const hasValidConcept = concept && concept.trim() && concept !== 'Default';
+  const members = currentPhoto?.members;
+  const hasMembers = members && String(members).trim();
+  const hasPhotoInfo = hasValidConcept || hasMembers;
+
+  // 정보 시트 열기
+  const openInfo = useCallback(() => {
+    setShowInfo(true);
+    window.history.pushState({ infoSheet: true }, '');
+  }, []);
+
+  // 이미지 다운로드
+  const downloadImage = useCallback(async () => {
+    const imageUrl = images[currentIndex];
+    if (!imageUrl) return;
+
+    try {
+      const response = await fetch(imageUrl);
+      const blob = await response.blob();
+      const url = window.URL.createObjectURL(blob);
+      const link = document.createElement('a');
+      link.href = url;
+      link.download = `${downloadPrefix}_${String(currentIndex + 1).padStart(2, '0')}.webp`;
+      document.body.appendChild(link);
+      link.click();
+      document.body.removeChild(link);
+      window.URL.revokeObjectURL(url);
+    } catch (error) {
+      console.error('다운로드 오류:', error);
+    }
+  }, [images, currentIndex, downloadPrefix]);
+
+  // 바디 스크롤 방지
+  useEffect(() => {
+    if (isOpen) {
+      document.body.style.overflow = 'hidden';
+    } else {
+      document.body.style.overflow = '';
+    }
+    return () => {
+      document.body.style.overflow = '';
+    };
+  }, [isOpen]);
+
+  // 뒤로가기 처리 (정보 시트)
+  useEffect(() => {
+    if (!isOpen) return;
+
+    const handlePopState = () => {
+      if (showInfo) {
+        setShowInfo(false);
+      } else {
+        onClose();
+      }
+    };
+
+    window.addEventListener('popstate', handlePopState);
+    return () => window.removeEventListener('popstate', handlePopState);
+  }, [isOpen, showInfo, onClose]);
+
+  // 라이트박스 닫힐 때 정보 시트도 닫기
+  useEffect(() => {
+    if (!isOpen) {
+      setShowInfo(false);
+    }
+  }, [isOpen]);
+
+  if (!isOpen || !images?.length) return null;
+
+  return (
+    <AnimatePresence>
+      <motion.div
+        initial={{ opacity: 0 }}
+        animate={{ opacity: 1 }}
+        exit={{ opacity: 0 }}
+        className="fixed inset-0 bg-black z-[60] flex flex-col"
+      >
+        {/* 상단 헤더 */}
+        <div className="absolute top-0 left-0 right-0 flex items-center px-4 py-3 z-20">
+          <div className="flex-1 flex justify-start">
+            <button onClick={() => window.history.back()} className="text-white/80 p-1">
+              <X size={24} />
+            </button>
+          </div>
+          {showCounter && images.length > 1 && (
+            <span className="text-white/70 text-sm tabular-nums">
+              {currentIndex + 1} / {images.length}
+            </span>
+          )}
+          <div className="flex-1 flex justify-end items-center gap-2">
+            {hasPhotoInfo && (
+              <button onClick={openInfo} className="text-white/80 p-1">
+                <Info size={22} />
+              </button>
+            )}
+            {showDownload && (
+              <button onClick={downloadImage} className="text-white/80 p-1">
+                <Download size={22} />
+              </button>
+            )}
+          </div>
+        </div>
+
+        {/* Swiper */}
+        <Swiper
+          modules={[Virtual]}
+          virtual
+          initialSlide={currentIndex}
+          onSwiper={(swiper) => {
+            swiperRef.current = swiper;
+          }}
+          onSlideChange={(swiper) => onIndexChange(swiper.activeIndex)}
+          className="w-full h-full"
+          spaceBetween={0}
+          slidesPerView={1}
+          resistance={true}
+          resistanceRatio={0.5}
+        >
+          {images.map((url, index) => (
+            <SwiperSlide key={index} virtualIndex={index}>
+              <div className="w-full h-full flex items-center justify-center">
+                {teasers?.[index]?.media_type === 'video' ? (
+                  <video
+                    src={url}
+                    className="max-w-full max-h-full object-contain"
+                    controls
+                    autoPlay={index === currentIndex}
+                  />
+                ) : (
+                  <img
+                    src={url}
+                    alt=""
+                    className="max-w-full max-h-full object-contain"
+                    loading={Math.abs(index - currentIndex) <= 2 ? 'eager' : 'lazy'}
+                  />
+                )}
+              </div>
+            </SwiperSlide>
+          ))}
+        </Swiper>
+
+        {/* 인디케이터 */}
+        {images.length > 1 && (
+          <LightboxIndicator
+            count={images.length}
+            currentIndex={currentIndex}
+            goToIndex={(i) => swiperRef.current?.slideTo(i)}
+            width={120}
+          />
+        )}
+
+        {/* 사진 정보 바텀시트 */}
+        <AnimatePresence>
+          {showInfo && hasPhotoInfo && (
+            <motion.div
+              initial={{ opacity: 0 }}
+              animate={{ opacity: 1 }}
+              exit={{ opacity: 0 }}
+              className="absolute inset-0 bg-black/60 z-30"
+              onClick={() => window.history.back()}
+            >
+              <motion.div
+                initial={{ y: '100%' }}
+                animate={{ y: 0 }}
+                exit={{ y: '100%' }}
+                transition={{ type: 'spring', damping: 25, stiffness: 300 }}
+                drag="y"
+                dragConstraints={{ top: 0, bottom: 0 }}
+                dragElastic={{ top: 0, bottom: 0.5 }}
+                onDragEnd={(_, info) => {
+                  if (info.offset.y > 100 || info.velocity.y > 300) {
+                    window.history.back();
+                  }
+                }}
+                className="absolute bottom-0 left-0 right-0 bg-zinc-900 rounded-t-3xl"
+                onClick={(e) => e.stopPropagation()}
+              >
+                {/* 드래그 핸들 */}
+                <div className="flex justify-center pt-3 pb-2 cursor-grab active:cursor-grabbing">
+                  <div className="w-10 h-1 bg-zinc-600 rounded-full" />
+                </div>
+
+                {/* 정보 내용 */}
+                <div className="px-5 pb-8 space-y-4">
+                  <h3 className="text-white font-semibold text-lg">사진 정보</h3>
+
+                  {hasMembers && (
+                    <div className="flex items-start gap-3">
+                      <div className="w-8 h-8 bg-primary/20 rounded-full flex items-center justify-center flex-shrink-0">
+                        <Users size={16} className="text-primary" />
+                      </div>
+                      <div>
+                        <p className="text-zinc-400 text-xs mb-1">멤버</p>
+                        <p className="text-white">{members}</p>
+                      </div>
+                    </div>
+                  )}
+
+                  {hasValidConcept && (
+                    <div className="flex items-start gap-3">
+                      <div className="w-8 h-8 bg-white/10 rounded-full flex items-center justify-center flex-shrink-0">
+                        <Tag size={16} className="text-zinc-400" />
+                      </div>
+                      <div>
+                        <p className="text-zinc-400 text-xs mb-1">컨셉</p>
+                        <p className="text-white">{concept}</p>
+                      </div>
+                    </div>
+                  )}
+                </div>
+              </motion.div>
+            </motion.div>
+          )}
+        </AnimatePresence>
+      </motion.div>
+    </AnimatePresence>
+  );
+}
+
+export default MobileLightbox;

frontend-temp/src/components/common/index.js

@@ -4,4 +4,5 @@ export { default as Toast } from './Toast';
 export { default as Tooltip } from './Tooltip';
 export { default as ScrollToTop } from './ScrollToTop';
 export { default as Lightbox } from './Lightbox';
+export { default as MobileLightbox } from './MobileLightbox';
 export { default as LightboxIndicator } from './LightboxIndicator';

frontend-temp/src/pages/album/mobile/AlbumDetail.jsx

@@ -1,4 +1,4 @@
-import { useState, useEffect, useCallback, useRef } from 'react';
+import { useState, useEffect, useCallback } from 'react';
 import { useParams, useNavigate } from 'react-router-dom';
 import { useQuery } from '@tanstack/react-query';
 import { motion, AnimatePresence } from 'framer-motion';
@@ -8,21 +8,14 @@ import {
   Music2,
   Clock,
   X,
-  Download,
   ChevronDown,
   ChevronUp,
   FileText,
   ChevronRight,
-  Info,
-  Users,
-  Tag,
 } from 'lucide-react';
-import { Swiper, SwiperSlide } from 'swiper/react';
-import { Virtual } from 'swiper/modules';
-import 'swiper/css';
 import { getAlbumByName } from '@/api/albums';
 import { formatDate, calculateTotalDuration } from '@/utils';
-import { LightboxIndicator } from '@/components/common';
+import { MobileLightbox } from '@/components/common';
 
 /**
  * Mobile 앨범 상세 페이지
@@ -30,11 +23,9 @@ import { LightboxIndicator } from '@/components/common';
 function MobileAlbumDetail() {
   const { name } = useParams();
   const navigate = useNavigate();
-  const [lightbox, setLightbox] = useState({ open: false, images: [], index: 0, showNav: true, teasers: null, photos: null });
+  const [lightbox, setLightbox] = useState({ open: false, images: [], index: 0, teasers: null, photos: null });
   const [showAllTracks, setShowAllTracks] = useState(false);
   const [showDescriptionModal, setShowDescriptionModal] = useState(false);
-  const [showPhotoInfo, setShowPhotoInfo] = useState(false);
-  const swiperRef = useRef(null);
 
   // 앨범 데이터 로드
   const { data: album, isLoading: loading } = useQuery({
@@ -49,8 +40,7 @@ function MobileAlbumDetail() {
       open: true,
       images,
       index,
-      showNav: options.showNav !== false,
-      teasers: options.teasers,
+      teasers: options.teasers || null,
       photos: options.photos || null,
     });
     window.history.pushState({ lightbox: true }, '');
@@ -62,52 +52,21 @@ function MobileAlbumDetail() {
     window.history.pushState({ description: true }, '');
   }, []);
 
-  // 사진 정보 바텀시트 열기
-  const openPhotoInfo = useCallback(() => {
-    setShowPhotoInfo(true);
-    window.history.pushState({ photoInfo: true }, '');
-  }, []);
-
-  // 뒤로가기 처리
+  // 뒤로가기 처리 (앨범 소개만 - 라이트박스는 MobileLightbox에서 처리)
   useEffect(() => {
     const handlePopState = () => {
-      if (showPhotoInfo) {
-        setShowPhotoInfo(false);
-      } else if (showDescriptionModal) {
+      if (showDescriptionModal) {
         setShowDescriptionModal(false);
-      } else if (lightbox.open) {
-        setLightbox((prev) => ({ ...prev, open: false }));
       }
     };
 
     window.addEventListener('popstate', handlePopState);
     return () => window.removeEventListener('popstate', handlePopState);
-  }, [showPhotoInfo, showDescriptionModal, lightbox.open]);
+  }, [showDescriptionModal]);
 
-  // 이미지 다운로드
-  const downloadImage = useCallback(async () => {
-    const imageUrl = lightbox.images[lightbox.index];
-    if (!imageUrl) return;
-
-    try {
-      const response = await fetch(imageUrl);
-      const blob = await response.blob();
-      const url = window.URL.createObjectURL(blob);
-      const link = document.createElement('a');
-      link.href = url;
-      link.download = `fromis9_photo_${String(lightbox.index + 1).padStart(2, '0')}.webp`;
-      document.body.appendChild(link);
-      link.click();
-      document.body.removeChild(link);
-      window.URL.revokeObjectURL(url);
-    } catch (error) {
-      console.error('다운로드 오류:', error);
-    }
-  }, [lightbox.images, lightbox.index]);
-
-  // 라이트박스/모달 body 스크롤 방지
+  // 앨범 소개 모달 body 스크롤 방지 (라이트박스는 MobileLightbox에서 처리)
   useEffect(() => {
-    if (lightbox.open || showDescriptionModal) {
+    if (showDescriptionModal) {
       document.body.style.overflow = 'hidden';
     } else {
       document.body.style.overflow = '';
@@ -115,7 +74,7 @@ function MobileAlbumDetail() {
     return () => {
       document.body.style.overflow = '';
     };
-  }, [lightbox.open, showDescriptionModal]);
+  }, [showDescriptionModal]);
 
   // 총 재생 시간 계산
   const totalDuration = calculateTotalDuration(album?.tracks);
@@ -146,7 +105,7 @@ function MobileAlbumDetail() {
           originalUrl: p.original_url,
           mediumUrl: p.medium_url,
           thumbUrl: p.thumb_url,
-          title: concept,
+          concept: concept !== 'Default' ? concept : null,
           members: p.members || '',
         })
       );
@@ -175,7 +134,7 @@ function MobileAlbumDetail() {
                 initial={{ opacity: 0, y: 20 }}
                 animate={{ opacity: 1, y: 0 }}
                 className="w-44 h-44 rounded-2xl overflow-hidden shadow-xl mb-4"
-                onClick={() => openLightbox([album.cover_original_url || album.cover_medium_url], 0, { showNav: false })}
+                onClick={() => openLightbox([album.cover_original_url || album.cover_medium_url], 0)}
               >
                 <img src={album.cover_medium_url} alt={album.title} className="w-full h-full object-cover" />
               </motion.div>
@@ -235,7 +194,7 @@ function MobileAlbumDetail() {
                     openLightbox(
                       album.teasers.map((t) => (t.media_type === 'video' ? t.video_url || t.original_url : t.original_url)),
                       index,
-                      { teasers: album.teasers, showNav: true }
+                      { teasers: album.teasers }
                     )
                   }
                   className="w-24 h-24 flex-shrink-0 bg-gray-100 rounded-2xl overflow-hidden relative shadow-sm"
@@ -322,7 +281,7 @@ function MobileAlbumDetail() {
                     openLightbox(
                       previewPhotos.map((p) => p.originalUrl),
                       idx,
-                      { showNav: true, photos: previewPhotos }
+                      { photos: previewPhotos }
                     )
                   }
                   className="aspect-square bg-gray-100 rounded-xl overflow-hidden shadow-sm"
@@ -394,162 +353,18 @@ function MobileAlbumDetail() {
         )}
       </AnimatePresence>
 
-      {/* 라이트박스 - Swiper ViewPager 스타일 */}
-      <AnimatePresence>
-        {lightbox.open && (() => {
-          const currentPhoto = lightbox.photos?.[lightbox.index];
-          const concept = currentPhoto?.title;
-          const hasValidConcept = concept && concept.trim() && concept !== 'Default';
-          const members = currentPhoto?.members;
-          const hasMembers = members && String(members).trim();
-          const hasPhotoInfo = hasValidConcept || hasMembers;
-
-          return (
-            <motion.div
-              initial={{ opacity: 0 }}
-              animate={{ opacity: 1 }}
-              exit={{ opacity: 0 }}
-              className="fixed inset-0 bg-black z-[60] flex flex-col"
-            >
-              {/* 상단 헤더 */}
-              <div className="absolute top-0 left-0 right-0 flex items-center px-4 py-3 z-20">
-                <div className="flex-1 flex justify-start">
-                  <button onClick={() => window.history.back()} className="text-white/80 p-1">
-                    <X size={24} />
-                  </button>
-                </div>
-                {lightbox.showNav && lightbox.images.length > 1 && (
-                  <span className="text-white/70 text-sm tabular-nums">
-                    {lightbox.index + 1} / {lightbox.images.length}
-                  </span>
-                )}
-                <div className="flex-1 flex justify-end items-center gap-2">
-                  {hasPhotoInfo && (
-                    <button onClick={openPhotoInfo} className="text-white/80 p-1">
-                      <Info size={22} />
-                    </button>
-                  )}
-                  <button onClick={downloadImage} className="text-white/80 p-1">
-                    <Download size={22} />
-                  </button>
-                </div>
-              </div>
-
-              {/* Swiper */}
-              <Swiper
-                modules={[Virtual]}
-                virtual
-                initialSlide={lightbox.index}
-                onSwiper={(swiper) => {
-                  swiperRef.current = swiper;
-                }}
-                onSlideChange={(swiper) => setLightbox((prev) => ({ ...prev, index: swiper.activeIndex }))}
-                className="w-full h-full"
-                spaceBetween={0}
-                slidesPerView={1}
-                resistance={true}
-                resistanceRatio={0.5}
-              >
-                {lightbox.images.map((url, index) => (
-                  <SwiperSlide key={index} virtualIndex={index}>
-                    <div className="w-full h-full flex items-center justify-center">
-                      {lightbox.teasers?.[index]?.media_type === 'video' ? (
-                        <video
-                          src={url}
-                          className="max-w-full max-h-full object-contain"
-                          controls
-                          autoPlay={index === lightbox.index}
-                        />
-                      ) : (
-                        <img
-                          src={url}
-                          alt=""
-                          className="max-w-full max-h-full object-contain"
-                          loading={Math.abs(index - lightbox.index) <= 2 ? 'eager' : 'lazy'}
-                        />
-                      )}
-                    </div>
-                  </SwiperSlide>
-                ))}
-              </Swiper>
-
-              {/* 모바일용 인디케이터 */}
-              {lightbox.showNav && lightbox.images.length > 1 && (
-                <LightboxIndicator
-                  count={lightbox.images.length}
-                  currentIndex={lightbox.index}
-                  goToIndex={(i) => swiperRef.current?.slideTo(i)}
-                  width={120}
-                />
-              )}
-
-              {/* 사진 정보 바텀시트 */}
-              <AnimatePresence>
-                {showPhotoInfo && hasPhotoInfo && (
-                  <motion.div
-                    initial={{ opacity: 0 }}
-                    animate={{ opacity: 1 }}
-                    exit={{ opacity: 0 }}
-                    className="absolute inset-0 bg-black/60 z-30"
-                    onClick={() => window.history.back()}
-                  >
-                    <motion.div
-                      initial={{ y: '100%' }}
-                      animate={{ y: 0 }}
-                      exit={{ y: '100%' }}
-                      transition={{ type: 'spring', damping: 25, stiffness: 300 }}
-                      drag="y"
-                      dragConstraints={{ top: 0, bottom: 0 }}
-                      dragElastic={{ top: 0, bottom: 0.5 }}
-                      onDragEnd={(_, info) => {
-                        if (info.offset.y > 100 || info.velocity.y > 300) {
-                          window.history.back();
-                        }
-                      }}
-                      className="absolute bottom-0 left-0 right-0 bg-zinc-900 rounded-t-3xl"
-                      onClick={(e) => e.stopPropagation()}
-                    >
-                      {/* 드래그 핸들 */}
-                      <div className="flex justify-center pt-3 pb-2 cursor-grab active:cursor-grabbing">
-                        <div className="w-10 h-1 bg-zinc-600 rounded-full" />
-                      </div>
-
-                      {/* 정보 내용 */}
-                      <div className="px-5 pb-8 space-y-4">
-                        <h3 className="text-white font-semibold text-lg">사진 정보</h3>
-
-                        {hasMembers && (
-                          <div className="flex items-start gap-3">
-                            <div className="w-8 h-8 bg-primary/20 rounded-full flex items-center justify-center flex-shrink-0">
-                              <Users size={16} className="text-primary" />
-                            </div>
-                            <div>
-                              <p className="text-zinc-400 text-xs mb-1">멤버</p>
-                              <p className="text-white">{members}</p>
-                            </div>
-                          </div>
-                        )}
-
-                        {hasValidConcept && (
-                          <div className="flex items-start gap-3">
-                            <div className="w-8 h-8 bg-white/10 rounded-full flex items-center justify-center flex-shrink-0">
-                              <Tag size={16} className="text-zinc-400" />
-                            </div>
-                            <div>
-                              <p className="text-zinc-400 text-xs mb-1">컨셉</p>
-                              <p className="text-white">{concept}</p>
-                            </div>
-                          </div>
-                        )}
-                      </div>
-                    </motion.div>
-                  </motion.div>
-                )}
-              </AnimatePresence>
-            </motion.div>
-          );
-        })()}
-      </AnimatePresence>
+      {/* 라이트박스 */}
+      <MobileLightbox
+        images={lightbox.images}
+        photos={lightbox.photos}
+        teasers={lightbox.teasers}
+        currentIndex={lightbox.index}
+        isOpen={lightbox.open}
+        onClose={() => setLightbox((prev) => ({ ...prev, open: false }))}
+        onIndexChange={(index) => setLightbox((prev) => ({ ...prev, index }))}
+        showCounter={lightbox.images.length > 1}
+        downloadPrefix={`fromis9_${album?.title || 'photo'}`}
+      />
     </>
   );
 }

frontend-temp/src/pages/album/mobile/AlbumGallery.jsx

@@ -1,13 +1,10 @@
-import { useState, useEffect, useCallback, useRef, useMemo } from 'react';
+import { useState, useCallback, useMemo } from 'react';
 import { useParams, useNavigate } from 'react-router-dom';
 import { useQuery } from '@tanstack/react-query';
-import { X, Download, ChevronRight, Info, Users, Tag } from 'lucide-react';
-import { motion, AnimatePresence } from 'framer-motion';
-import { Swiper, SwiperSlide } from 'swiper/react';
-import { Virtual } from 'swiper/modules';
-import 'swiper/css';
+import { ChevronRight } from 'lucide-react';
+import { motion } from 'framer-motion';
 import { getAlbumByName } from '@/api/albums';
-import { LightboxIndicator } from '@/components/common';
+import { MobileLightbox } from '@/components/common';
 
 /**
  * Mobile 앨범 갤러리 페이지
@@ -16,8 +13,6 @@ function MobileAlbumGallery() {
   const { name } = useParams();
   const navigate = useNavigate();
   const [selectedIndex, setSelectedIndex] = useState(null);
-  const [showInfo, setShowInfo] = useState(false);
-  const swiperRef = useRef(null);
 
   // 앨범 데이터 로드
   const { data: album, isLoading: loading } = useQuery({
@@ -47,59 +42,6 @@ function MobileAlbumGallery() {
     window.history.pushState({ lightbox: true }, '');
   }, []);
 
-  // 정보 시트 열기
-  const openInfo = useCallback(() => {
-    setShowInfo(true);
-    window.history.pushState({ infoSheet: true }, '');
-  }, []);
-
-  // 뒤로가기 처리
-  useEffect(() => {
-    const handlePopState = () => {
-      if (showInfo) {
-        setShowInfo(false);
-      } else if (selectedIndex !== null) {
-        setSelectedIndex(null);
-      }
-    };
-
-    window.addEventListener('popstate', handlePopState);
-    return () => window.removeEventListener('popstate', handlePopState);
-  }, [showInfo, selectedIndex]);
-
-  // 이미지 다운로드
-  const downloadImage = useCallback(async () => {
-    const photo = photos[selectedIndex];
-    if (!photo) return;
-
-    try {
-      const response = await fetch(photo.original_url);
-      const blob = await response.blob();
-      const url = window.URL.createObjectURL(blob);
-      const link = document.createElement('a');
-      link.href = url;
-      link.download = `fromis9_${album?.title || 'photo'}_${String(selectedIndex + 1).padStart(2, '0')}.webp`;
-      document.body.appendChild(link);
-      link.click();
-      document.body.removeChild(link);
-      window.URL.revokeObjectURL(url);
-    } catch (error) {
-      console.error('다운로드 오류:', error);
-    }
-  }, [photos, selectedIndex, album?.title]);
-
-  // 바디 스크롤 방지
-  useEffect(() => {
-    if (selectedIndex !== null) {
-      document.body.style.overflow = 'hidden';
-    } else {
-      document.body.style.overflow = '';
-    }
-    return () => {
-      document.body.style.overflow = '';
-    };
-  }, [selectedIndex]);
-
   // 사진을 2열로 균등 분배 (높이 기반)
   const distributePhotos = () => {
     const leftColumn = [];
@@ -124,17 +66,6 @@ function MobileAlbumGallery() {
 
   const { leftColumn, rightColumn } = distributePhotos();
 
-  // 현재 사진 정보
-  const currentPhoto = selectedIndex !== null ? photos[selectedIndex] : null;
-  const hasInfo = currentPhoto?.concept || currentPhoto?.members;
-
-  // 정보 시트 드래그 핸들러
-  const handleInfoDragEnd = (_, info) => {
-    if (info.offset.y > 100 || info.velocity.y > 300) {
-      window.history.back();
-    }
-  };
-
   if (loading) {
     return (
       <div className="flex items-center justify-center h-64">
@@ -209,136 +140,17 @@ function MobileAlbumGallery() {
         </div>
       </div>
 
-      {/* 풀스크린 라이트박스 */}
-      <AnimatePresence>
-        {selectedIndex !== null && (
-          <motion.div
-            initial={{ opacity: 0 }}
-            animate={{ opacity: 1 }}
-            exit={{ opacity: 0 }}
-            className="fixed inset-0 bg-black z-[60] flex flex-col"
-          >
-            {/* 상단 헤더 */}
-            <div className="absolute top-0 left-0 right-0 flex items-center px-4 py-3 z-20">
-              <div className="flex-1 flex justify-start">
-                <button onClick={() => window.history.back()} className="text-white/80 p-1">
-                  <X size={24} />
-                </button>
-              </div>
-              <span className="text-white/70 text-sm tabular-nums">
-                {selectedIndex + 1} / {photos.length}
-              </span>
-              <div className="flex-1 flex justify-end items-center gap-2">
-                {hasInfo && (
-                  <button onClick={openInfo} className="text-white/80 p-1">
-                    <Info size={22} />
-                  </button>
-                )}
-                <button onClick={downloadImage} className="text-white/80 p-1">
-                  <Download size={22} />
-                </button>
-              </div>
-            </div>
-
-            {/* Swiper */}
-            <Swiper
-              modules={[Virtual]}
-              virtual
-              initialSlide={selectedIndex}
-              onSwiper={(swiper) => {
-                swiperRef.current = swiper;
-              }}
-              onSlideChange={(swiper) => setSelectedIndex(swiper.activeIndex)}
-              className="w-full h-full"
-              spaceBetween={0}
-              slidesPerView={1}
-              resistance={true}
-              resistanceRatio={0.5}
-            >
-              {photos.map((photo, index) => (
-                <SwiperSlide key={photo.id || index} virtualIndex={index}>
-                  <div className="w-full h-full flex items-center justify-center">
-                    <img
-                      src={photo.medium_url || photo.original_url}
-                      alt=""
-                      className="max-w-full max-h-full object-contain"
-                      loading={Math.abs(index - selectedIndex) <= 2 ? 'eager' : 'lazy'}
-                    />
-                  </div>
-                </SwiperSlide>
-              ))}
-            </Swiper>
-
-            {/* 모바일용 인디케이터 */}
-            <LightboxIndicator
-              count={photos.length}
-              currentIndex={selectedIndex}
-              goToIndex={(i) => swiperRef.current?.slideTo(i)}
-              width={120}
-            />
-
-            {/* 정보 바텀시트 */}
-            <AnimatePresence>
-              {showInfo && hasInfo && (
-                <motion.div
-                  initial={{ opacity: 0 }}
-                  animate={{ opacity: 1 }}
-                  exit={{ opacity: 0 }}
-                  className="absolute inset-0 bg-black/60 z-30"
-                  onClick={() => window.history.back()}
-                >
-                  <motion.div
-                    initial={{ y: '100%' }}
-                    animate={{ y: 0 }}
-                    exit={{ y: '100%' }}
-                    transition={{ type: 'spring', damping: 25, stiffness: 300 }}
-                    drag="y"
-                    dragConstraints={{ top: 0, bottom: 0 }}
-                    dragElastic={{ top: 0, bottom: 0.5 }}
-                    onDragEnd={handleInfoDragEnd}
-                    className="absolute bottom-0 left-0 right-0 bg-zinc-900 rounded-t-3xl"
-                    onClick={(e) => e.stopPropagation()}
-                  >
-                    {/* 드래그 핸들 */}
-                    <div className="flex justify-center pt-3 pb-2 cursor-grab active:cursor-grabbing">
-                      <div className="w-10 h-1 bg-zinc-600 rounded-full" />
-                    </div>
-
-                    {/* 정보 내용 */}
-                    <div className="px-5 pb-8 space-y-4">
-                      <h3 className="text-white font-semibold text-lg">사진 정보</h3>
-
-                      {currentPhoto?.members && (
-                        <div className="flex items-start gap-3">
-                          <div className="w-8 h-8 bg-primary/20 rounded-full flex items-center justify-center flex-shrink-0">
-                            <Users size={16} className="text-primary" />
-                          </div>
-                          <div>
-                            <p className="text-zinc-400 text-xs mb-1">멤버</p>
-                            <p className="text-white">{currentPhoto.members}</p>
-                          </div>
-                        </div>
-                      )}
-
-                      {currentPhoto?.concept && (
-                        <div className="flex items-start gap-3">
-                          <div className="w-8 h-8 bg-white/10 rounded-full flex items-center justify-center flex-shrink-0">
-                            <Tag size={16} className="text-zinc-400" />
-                          </div>
-                          <div>
-                            <p className="text-zinc-400 text-xs mb-1">컨셉</p>
-                            <p className="text-white">{currentPhoto.concept}</p>
-                          </div>
-                        </div>
-                      )}
-                    </div>
-                  </motion.div>
-                </motion.div>
-              )}
-            </AnimatePresence>
-          </motion.div>
-        )}
-      </AnimatePresence>
+      {/* 라이트박스 */}
+      <MobileLightbox
+        images={photos.map((p) => p.medium_url || p.original_url)}
+        photos={photos}
+        currentIndex={selectedIndex ?? 0}
+        isOpen={selectedIndex !== null}
+        onClose={() => setSelectedIndex(null)}
+        onIndexChange={setSelectedIndex}
+        showCounter={photos.length > 1}
+        downloadPrefix={`fromis9_${album?.title || 'photo'}`}
+      />
     </>
   );
 }