refactor(lightbox): PC AlbumDetail에서 공통 Lightbox 컴포넌트 사용

- 공통 Lightbox 컴포넌트에 비디오 지원 추가 (teasers prop)
- 사진 메타데이터 표시 지원 (photos prop으로 컨셉/멤버 정보)
- showCounter, showDownload props 추가
- PC AlbumDetail의 인라인 라이트박스 코드 제거 (-285줄)
- 코드 중복 제거 및 유지보수성 향상

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

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

@@ -1,13 +1,36 @@
 import { useState, useEffect, useCallback, memo } from 'react';
 import { motion, AnimatePresence } from 'framer-motion';
-import { X, ChevronLeft, ChevronRight } from 'lucide-react';
+import { X, ChevronLeft, ChevronRight, Download } from 'lucide-react';
 import LightboxIndicator from './LightboxIndicator';
 
 /**
  * 라이트박스 공통 컴포넌트
- * 이미지 갤러리를 전체 화면으로 표시
+ * 이미지/비디오 갤러리를 전체 화면으로 표시
+ *
+ * @param {string[]} images - 이미지/비디오 URL 배열
+ * @param {Object[]} photos - 메타데이터 포함 사진 배열 (선택적)
+ *   @param {string} photos[].title - 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)
  */
-function Lightbox({ images, currentIndex, isOpen, onClose, onIndexChange }) {
+function Lightbox({
+  images,
+  photos,
+  teasers,
+  currentIndex,
+  isOpen,
+  onClose,
+  onIndexChange,
+  showCounter = true,
+  showDownload = true,
+}) {
   const [imageLoaded, setImageLoaded] = useState(false);
   const [slideDirection, setSlideDirection] = useState(0);
 
@@ -36,6 +59,27 @@ function Lightbox({ images, currentIndex, isOpen, onClose, onIndexChange }) {
     [currentIndex, onIndexChange]
   );
 
+  // 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 = URL.createObjectURL(blob);
+      const link = document.createElement('a');
+      link.href = url;
+      link.download = `image_${currentIndex + 1}.jpg`;
+      document.body.appendChild(link);
+      link.click();
+      document.body.removeChild(link);
+      URL.revokeObjectURL(url);
+    } catch (error) {
+      console.error('이미지 다운로드 실패:', error);
+    }
+  }, [images, currentIndex]);
+
   // 라이트박스 열릴 때 body 스크롤 숨기기
   useEffect(() => {
     if (isOpen) {
@@ -80,6 +124,13 @@ function Lightbox({ images, currentIndex, isOpen, onClose, onIndexChange }) {
     setImageLoaded(false);
   }, [currentIndex]);
 
+  // 현재 사진의 메타데이터
+  const currentPhoto = photos?.[currentIndex];
+  const photoTitle = currentPhoto?.title;
+  const hasValidTitle = photoTitle && photoTitle.trim() && photoTitle !== 'Default';
+  const photoMembers = currentPhoto?.members;
+  const hasMembers = photoMembers && String(photoMembers).trim();
+
   return (
     <AnimatePresence>
       {isOpen && images.length > 0 && (
@@ -96,15 +147,36 @@ function Lightbox({ images, currentIndex, isOpen, onClose, onIndexChange }) {
           onClick={onClose}
         >
           {/* 내부 컨테이너 */}
-          <div className="min-w-[800px] min-h-[600px] w-full h-full relative flex items-center justify-center">
-            {/* 닫기 버튼 */}
+          <div className="min-w-[1400px] min-h-[1200px] w-full h-full relative flex items-center justify-center">
+            {/* 카운터 */}
+            {showCounter && images.length > 1 && (
+              <div className="absolute top-6 left-6 text-white/70 text-sm z-10">
+                {currentIndex + 1} / {images.length}
+              </div>
+            )}
+
+            {/* 상단 버튼들 */}
+            <div className="absolute top-6 right-6 flex gap-3 z-10">
+              {showDownload && (
+                <button
+                  aria-label="다운로드"
+                  className="text-white/70 hover:text-white transition-colors"
+                  onClick={(e) => {
+                    e.stopPropagation();
+                    downloadImage();
+                  }}
+                >
+                  <Download size={28} aria-hidden="true" />
+                </button>
+              )}
               <button
                 aria-label="닫기"
-              className="absolute top-6 right-6 text-white/70 hover:text-white transition-colors z-10"
+                className="text-white/70 hover:text-white transition-colors"
                 onClick={onClose}
               >
                 <X size={32} aria-hidden="true" />
               </button>
+            </div>
 
             {/* 이전 버튼 */}
             {images.length > 1 && (
@@ -127,13 +199,29 @@ function Lightbox({ images, currentIndex, isOpen, onClose, onIndexChange }) {
               </div>
             )}
 
-            {/* 이미지 */}
+            {/* 이미지/비디오 + 메타데이터 */}
             <div className="flex flex-col items-center mx-24">
+              {teasers?.[currentIndex]?.media_type === 'video' ? (
+                <motion.video
+                  key={currentIndex}
+                  src={images[currentIndex]}
+                  className={`max-w-[1100px] max-h-[900px] object-contain transition-opacity duration-200 ${
+                    imageLoaded ? 'opacity-100' : 'opacity-0'
+                  }`}
+                  onClick={(e) => e.stopPropagation()}
+                  onCanPlay={() => setImageLoaded(true)}
+                  initial={{ x: slideDirection * 100 }}
+                  animate={{ x: 0 }}
+                  transition={{ duration: 0.25, ease: 'easeOut' }}
+                  controls
+                  autoPlay
+                />
+              ) : (
                 <motion.img
                   key={currentIndex}
                   src={images[currentIndex]}
                   alt={`이미지 ${currentIndex + 1}`}
-                className={`max-w-[90vw] max-h-[85vh] object-contain transition-opacity duration-200 ${
+                  className={`max-w-[1100px] max-h-[900px] object-contain transition-opacity duration-200 ${
                     imageLoaded ? 'opacity-100' : 'opacity-0'
                   }`}
                   onClick={(e) => e.stopPropagation()}
@@ -142,6 +230,29 @@ function Lightbox({ images, currentIndex, isOpen, onClose, onIndexChange }) {
                   animate={{ x: 0 }}
                   transition={{ duration: 0.25, ease: 'easeOut' }}
                 />
+              )}
+
+              {/* 컨셉/멤버 정보 */}
+              {imageLoaded && (hasValidTitle || hasMembers) && (
+                <div className="mt-6 flex flex-col items-center gap-2">
+                  {hasValidTitle && (
+                    <span className="px-4 py-2 bg-white/10 backdrop-blur-sm rounded-full text-white font-medium text-base">
+                      {photoTitle}
+                    </span>
+                  )}
+                  {hasMembers && (
+                    <div className="flex items-center gap-2">
+                      {String(photoMembers)
+                        .split(',')
+                        .map((member, idx) => (
+                          <span key={idx} className="px-3 py-1.5 bg-primary/80 rounded-full text-white text-sm">
+                            {member.trim()}
+                          </span>
+                        ))}
+                    </div>
+                  )}
+                </div>
+              )}
             </div>
 
             {/* 다음 버튼 */}

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

@@ -2,20 +2,10 @@ 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';
-import {
-  Calendar,
-  Music2,
-  Clock,
-  X,
-  ChevronLeft,
-  ChevronRight,
-  Download,
-  MoreVertical,
-  FileText,
-} from 'lucide-react';
+import { Calendar, Music2, Clock, X, MoreVertical, FileText } from 'lucide-react';
 import { getAlbumByName } from '@/api/albums';
 import { formatDate, calculateTotalDuration } from '@/utils';
-import { LightboxIndicator } from '@/components/common';
+import { Lightbox } from '@/components/common';
 
 /**
  * PC 앨범 상세 페이지
@@ -24,9 +14,6 @@ function PCAlbumDetail() {
   const { name } = useParams();
   const navigate = useNavigate();
   const [lightbox, setLightbox] = useState({ open: false, images: [], index: 0, teasers: null, photos: null });
-  const [slideDirection, setSlideDirection] = useState(0);
-  const [imageLoaded, setImageLoaded] = useState(false);
-  const [preloadedImages] = useState(() => new Set());
   const [showDescriptionModal, setShowDescriptionModal] = useState(false);
   const [showMenu, setShowMenu] = useState(false);
 
@@ -37,37 +24,12 @@ function PCAlbumDetail() {
     enabled: !!name,
   });
 
-  // 라이트박스 네비게이션
-  const goToPrev = useCallback(() => {
-    if (lightbox.images.length <= 1) return;
-    setImageLoaded(false);
-    setSlideDirection(-1);
-    setLightbox((prev) => ({
-      ...prev,
-      index: (prev.index - 1 + prev.images.length) % prev.images.length,
-    }));
-  }, [lightbox.images.length]);
-
-  const goToNext = useCallback(() => {
-    if (lightbox.images.length <= 1) return;
-    setImageLoaded(false);
-    setSlideDirection(1);
-    setLightbox((prev) => ({
-      ...prev,
-      index: (prev.index + 1) % prev.images.length,
-    }));
-  }, [lightbox.images.length]);
-
   // 라이트박스 열기
   const openLightbox = useCallback((images, index, options = {}) => {
     setLightbox({ open: true, images, index, teasers: options.teasers, photos: options.photos || null });
     window.history.pushState({ lightbox: true }, '');
   }, []);
 
-  const closeLightbox = useCallback(() => {
-    setLightbox((prev) => ({ ...prev, open: false }));
-  }, []);
-
   // 뒤로가기 처리
   useEffect(() => {
     const handlePopState = () => {
@@ -82,87 +44,6 @@ function PCAlbumDetail() {
     return () => window.removeEventListener('popstate', handlePopState);
   }, [showDescriptionModal, lightbox.open]);
 
-  // 라이트박스 열릴 때 body 스크롤 숨기기
-  useEffect(() => {
-    if (lightbox.open) {
-      document.documentElement.style.overflow = 'hidden';
-      document.body.style.overflow = 'hidden';
-    } else {
-      document.documentElement.style.overflow = '';
-      document.body.style.overflow = '';
-    }
-    return () => {
-      document.documentElement.style.overflow = '';
-      document.body.style.overflow = '';
-    };
-  }, [lightbox.open]);
-
-  // 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]);
-
-  // 키보드 이벤트 핸들러
-  useEffect(() => {
-    if (!lightbox.open) return;
-
-    const handleKeyDown = (e) => {
-      switch (e.key) {
-        case 'ArrowLeft':
-          goToPrev();
-          break;
-        case 'ArrowRight':
-          goToNext();
-          break;
-        case 'Escape':
-          window.history.back();
-          break;
-        default:
-          break;
-      }
-    };
-
-    window.addEventListener('keydown', handleKeyDown);
-    return () => window.removeEventListener('keydown', handleKeyDown);
-  }, [lightbox.open, goToPrev, goToNext]);
-
-  // 이미지 프리로딩
-  useEffect(() => {
-    if (!lightbox.open || lightbox.images.length <= 1) return;
-
-    const indicesToPreload = [];
-    for (let offset = -2; offset <= 2; offset++) {
-      if (offset === 0) continue;
-      const idx = (lightbox.index + offset + lightbox.images.length) % lightbox.images.length;
-      indicesToPreload.push(idx);
-    }
-
-    indicesToPreload.forEach((idx) => {
-      const url = lightbox.images[idx];
-      if (preloadedImages.has(url)) return;
-
-      const img = new Image();
-      img.onload = () => preloadedImages.add(url);
-      img.src = url;
-    });
-  }, [lightbox.open, lightbox.index, lightbox.images, preloadedImages]);
-
   // 총 재생 시간 계산
   const totalDuration = calculateTotalDuration(album?.tracks);
 
@@ -445,144 +326,18 @@ function PCAlbumDetail() {
         </div>
       </motion.div>
 
-      {/* 라이트박스 모달 */}
-      <AnimatePresence>
-        {lightbox.open && (
-          <motion.div
-            initial={{ opacity: 0 }}
-            animate={{ opacity: 1 }}
-            exit={{ opacity: 0 }}
-            transition={{ duration: 0.2 }}
-            className="fixed inset-0 bg-black/95 z-50 overflow-scroll lightbox-no-scrollbar"
-            style={{ scrollbarWidth: 'none', msOverflowStyle: 'none' }}
-          >
-            <div className="min-w-[1400px] min-h-[1200px] w-full h-full relative flex items-center justify-center">
-              {/* 상단 버튼들 */}
-              <div className="absolute top-6 right-6 flex gap-3 z-10">
-                <button
-                  className="text-white/70 hover:text-white transition-colors"
-                  onClick={(e) => {
-                    e.stopPropagation();
-                    downloadImage();
-                  }}
-                >
-                  <Download size={28} />
-                </button>
-                <button className="text-white/70 hover:text-white transition-colors" onClick={() => window.history.back()}>
-                  <X size={32} />
-                </button>
-              </div>
-
-              {/* 이전 버튼 */}
-              {lightbox.images.length > 1 && (
-                <button
-                  className="absolute left-6 p-2 text-white/70 hover:text-white transition-colors z-10"
-                  onClick={(e) => {
-                    e.stopPropagation();
-                    goToPrev();
-                  }}
-                >
-                  <ChevronLeft size={48} />
-                </button>
-              )}
-
-              {/* 로딩 스피너 */}
-              {!imageLoaded && (
-                <div className="absolute inset-0 flex items-center justify-center">
-                  <div className="animate-spin rounded-full h-12 w-12 border-4 border-white border-t-transparent" />
-                </div>
-              )}
-
-              {/* 이미지 또는 비디오 */}
-              <div className="flex flex-col items-center mx-24">
-                {lightbox.teasers?.[lightbox.index]?.media_type === 'video' ? (
-                  <motion.video
-                    key={lightbox.index}
-                    src={lightbox.images[lightbox.index]}
-                    className={`max-w-[1100px] max-h-[900px] object-contain transition-opacity duration-200 ${
-                      imageLoaded ? 'opacity-100' : 'opacity-0'
-                    }`}
-                    onClick={(e) => e.stopPropagation()}
-                    onCanPlay={() => setImageLoaded(true)}
-                    initial={{ x: slideDirection * 100 }}
-                    animate={{ x: 0 }}
-                    transition={{ duration: 0.25, ease: 'easeOut' }}
-                    controls
-                    autoPlay
-                  />
-                ) : (
-                  <motion.img
-                    key={lightbox.index}
-                    src={lightbox.images[lightbox.index]}
-                    alt="확대 이미지"
-                    className={`max-w-[1100px] max-h-[900px] object-contain transition-opacity duration-200 ${
-                      imageLoaded ? 'opacity-100' : 'opacity-0'
-                    }`}
-                    onClick={(e) => e.stopPropagation()}
-                    onLoad={() => setImageLoaded(true)}
-                    initial={{ x: slideDirection * 100 }}
-                    animate={{ x: 0 }}
-                    transition={{ duration: 0.25, ease: 'easeOut' }}
-                  />
-                )}
-                {/* 컨셉 포토 정보 (멤버 + 컨셉) */}
-                {imageLoaded && lightbox.photos && (() => {
-                  const photo = lightbox.photos[lightbox.index];
-                  const title = photo?.title;
-                  const hasValidTitle = title && title.trim() && title !== 'Default';
-                  const members = photo?.members;
-                  const hasMembers = members && String(members).trim();
-
-                  if (!hasValidTitle && !hasMembers) return null;
-
-                  return (
-                    <div className="mt-6 flex flex-col items-center gap-2">
-                      {hasValidTitle && (
-                        <span className="px-4 py-2 bg-white/10 backdrop-blur-sm rounded-full text-white font-medium text-base">
-                          {title}
-                        </span>
-                      )}
-                      {hasMembers && (
-                        <div className="flex items-center gap-2">
-                          {String(members)
-                            .split(',')
-                            .map((member, idx) => (
-                              <span key={idx} className="px-3 py-1.5 bg-primary/80 rounded-full text-white text-sm">
-                                {member.trim()}
-                              </span>
-                            ))}
-                        </div>
-                      )}
-                    </div>
-                  );
-                })()}
-              </div>
-
-              {/* 다음 버튼 */}
-              {lightbox.images.length > 1 && (
-                <button
-                  className="absolute right-6 p-2 text-white/70 hover:text-white transition-colors z-10"
-                  onClick={(e) => {
-                    e.stopPropagation();
-                    goToNext();
-                  }}
-                >
-                  <ChevronRight size={48} />
-                </button>
-              )}
-
-              {/* 인디케이터 */}
-              {lightbox.images.length > 1 && (
-                <LightboxIndicator
-                  count={lightbox.images.length}
+      {/* 라이트박스 */}
+      <Lightbox
+        images={lightbox.images}
+        photos={lightbox.photos}
+        teasers={lightbox.teasers}
         currentIndex={lightbox.index}
-                  goToIndex={(i) => setLightbox((prev) => ({ ...prev, index: i }))}
+        isOpen={lightbox.open}
+        onClose={() => window.history.back()}
+        onIndexChange={(index) => setLightbox((prev) => ({ ...prev, index }))}
+        showCounter={lightbox.images.length > 1}
+        showDownload
       />
-              )}
-            </div>
-          </motion.div>
-        )}
-      </AnimatePresence>
 
       {/* 앨범 소개 다이얼로그 */}
       <AnimatePresence>