모바일 일정 상세 페이지 X 섹션 구현

- X 스타일 카드 UI (프로필, 본문, 이미지, 날짜)
- 프로필 정보 API 연동 (getXProfile)
- X 스타일 날짜/시간 포맷팅
- X에서 보기 버튼

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

frontend/src/pages/mobile/public/ScheduleDetail.jsx

@@ -90,6 +90,33 @@ const formatTime = (timeStr) => {
     return timeStr.slice(0, 5);
 };
 
+// X URL에서 username 추출
+const extractXUsername = (url) => {
+    if (!url) return null;
+    const match = url.match(/(?:twitter\.com|x\.com)\/([^/]+)/);
+    return match ? match[1] : null;
+};
+
+// X용 날짜/시간 포맷팅 (오후 2:30 · 2026년 1월 15일)
+const formatXDateTime = (dateStr, timeStr) => {
+    if (!dateStr) return '';
+    const date = new Date(dateStr);
+    const year = date.getFullYear();
+    const month = date.getMonth() + 1;
+    const day = date.getDate();
+
+    let result = `${year}년 ${month}월 ${day}일`;
+
+    if (timeStr) {
+        const [hours, minutes] = timeStr.split(':').map(Number);
+        const period = hours < 12 ? '오전' : '오후';
+        const hour12 = hours === 0 ? 12 : hours > 12 ? hours - 12 : hours;
+        result = `${period} ${hour12}:${String(minutes).padStart(2, '0')} · ${result}`;
+    }
+
+    return result;
+};
+
 // 유튜브 섹션 컴포넌트
 function YoutubeSection({ schedule }) {
     const videoId = extractYoutubeVideoId(schedule.source_url);
@@ -194,6 +221,104 @@ function YoutubeSection({ schedule }) {
     );
 }
 
+// X(트위터) 섹션 컴포넌트
+function XSection({ schedule }) {
+    const username = extractXUsername(schedule.source_url);
+
+    // 프로필 정보 조회
+    const { data: profile } = useQuery({
+        queryKey: ['x-profile', username],
+        queryFn: () => getXProfile(username),
+        enabled: !!username,
+        staleTime: 1000 * 60 * 60, // 1시간
+    });
+
+    const displayName = profile?.displayName || schedule.source_name || username || 'Unknown';
+    const avatarUrl = profile?.avatarUrl;
+
+    return (
+        <motion.div
+            initial={{ opacity: 0, y: 10 }}
+            animate={{ opacity: 1, y: 0 }}
+            transition={{ delay: 0.1 }}
+            className="bg-white rounded-xl border border-gray-200 overflow-hidden"
+        >
+            {/* 헤더 */}
+            <div className="p-4 pb-0">
+                <div className="flex items-center gap-3">
+                    {/* 프로필 이미지 */}
+                    {avatarUrl ? (
+                        <img
+                            src={avatarUrl}
+                            alt={displayName}
+                            className="w-10 h-10 rounded-full object-cover"
+                        />
+                    ) : (
+                        <div className="w-10 h-10 rounded-full bg-gradient-to-br from-gray-700 to-gray-900 flex items-center justify-center">
+                            <span className="text-white font-bold">
+                                {displayName.charAt(0).toUpperCase()}
+                            </span>
+                        </div>
+                    )}
+                    <div className="flex-1 min-w-0">
+                        <div className="flex items-center gap-1.5">
+                            <span className="font-bold text-gray-900 text-sm truncate">
+                                {displayName}
+                            </span>
+                            <svg className="w-4 h-4 text-blue-500 flex-shrink-0" viewBox="0 0 24 24" fill="currentColor">
+                                <path d="M22.25 12c0-1.43-.88-2.67-2.19-3.34.46-1.39.2-2.9-.81-3.91s-2.52-1.27-3.91-.81c-.66-1.31-1.91-2.19-3.34-2.19s-2.67.88-3.34 2.19c-1.39-.46-2.9-.2-3.91.81s-1.27 2.52-.81 3.91C2.63 9.33 1.75 10.57 1.75 12s.88 2.67 2.19 3.34c-.46 1.39-.2 2.9.81 3.91s2.52 1.27 3.91.81c.66 1.31 1.91 2.19 3.34 2.19s2.67-.88 3.34-2.19c1.39.46 2.9.2 3.91-.81s1.27-2.52.81-3.91c1.31-.67 2.19-1.91 2.19-3.34zm-11.07 4.57l-3.84-3.84 1.27-1.27 2.57 2.57 5.39-5.39 1.27 1.27-6.66 6.66z"/>
+                            </svg>
+                        </div>
+                        {username && (
+                            <span className="text-xs text-gray-500">@{username}</span>
+                        )}
+                    </div>
+                </div>
+            </div>
+
+            {/* 본문 */}
+            <div className="p-4">
+                <p className="text-gray-900 text-[15px] leading-relaxed whitespace-pre-wrap">
+                    {decodeHtmlEntities(schedule.description || schedule.title)}
+                </p>
+            </div>
+
+            {/* 이미지 */}
+            {schedule.image_url && (
+                <div className="px-4 pb-3">
+                    <img
+                        src={schedule.image_url}
+                        alt=""
+                        className="w-full rounded-xl border border-gray-100"
+                    />
+                </div>
+            )}
+
+            {/* 날짜/시간 */}
+            <div className="px-4 py-3 border-t border-gray-100">
+                <span className="text-gray-500 text-sm">
+                    {formatXDateTime(schedule.date, schedule.time)}
+                </span>
+            </div>
+
+            {/* X에서 보기 버튼 */}
+            <div className="px-4 py-3 border-t border-gray-100 bg-gray-50/50">
+                <a
+                    href={schedule.source_url}
+                    target="_blank"
+                    rel="noopener noreferrer"
+                    className="flex items-center justify-center gap-2 w-full py-2.5 bg-gray-900 active:bg-black text-white rounded-full font-medium transition-colors"
+                >
+                    <svg className="w-4 h-4" viewBox="0 0 24 24" fill="currentColor">
+                        <path d="M18.244 2.25h3.308l-7.227 8.26 8.502 11.24H16.17l-5.214-6.817L4.99 21.75H1.68l7.73-8.835L1.254 2.25H8.08l4.713 6.231zm-1.161 17.52h1.833L7.084 4.126H5.117z"/>
+                    </svg>
+                    X에서 보기
+                </a>
+            </div>
+        </motion.div>
+    );
+}
+
 // 기본 섹션 컴포넌트 (다른 카테고리용 - 임시)
 function DefaultSection({ schedule }) {
     return (
@@ -341,6 +466,8 @@ function MobileScheduleDetail() {
         switch (schedule.category_id) {
             case CATEGORY_ID.YOUTUBE:
                 return <YoutubeSection schedule={schedule} />;
+            case CATEGORY_ID.X:
+                return <XSection schedule={schedule} />;
             default:
                 return <DefaultSection schedule={schedule} />;
         }