fix(app): X 상세 화면 프로필 사진/표시 이름 누락 수정

- ScheduleDetail에 profileDisplayName, profileAvatarUrl 필드 추가
- X 섹션: profile.displayName으로 표시 이름, profile.avatarUrl로 프로필 사진 표시
- 아바타 URL이 없을 때 이니셜 폴백 유지
- @username 표시 수정 (displayName이 아닌 실제 username 사용)

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

app/lib/models/schedule.dart

@@ -55,6 +55,9 @@ class ScheduleDetail {
   final String? content;
   final List<String> imageUrls;
   final String? postUrl;
+  // X 프로필
+  final String? profileDisplayName;
+  final String? profileAvatarUrl;
 
   ScheduleDetail({
     required this.id,
@@ -75,6 +78,8 @@ class ScheduleDetail {
     this.content,
     this.imageUrls = const [],
     this.postUrl,
+    this.profileDisplayName,
+    this.profileAvatarUrl,
   });
 
   factory ScheduleDetail.fromJson(Map<String, dynamic> json) {
@@ -103,6 +108,8 @@ class ScheduleDetail {
       content: json['content'] as String?,
       imageUrls: (json['imageUrls'] as List<dynamic>?)?.cast<String>() ?? [],
       postUrl: json['postUrl'] as String?,
+      profileDisplayName: (json['profile'] as Map<String, dynamic>?)?['displayName'] as String?,
+      profileAvatarUrl: (json['profile'] as Map<String, dynamic>?)?['avatarUrl'] as String?,
     );
   }
 

app/lib/views/schedule/schedule_detail_view.dart

@@ -423,7 +423,9 @@ class _ScheduleDetailViewState extends ConsumerState<ScheduleDetailView> {
 
   /// X 섹션
   Widget _buildXSection(ScheduleDetail schedule) {
-    final displayName = schedule.username ?? 'Unknown';
+    final username = schedule.username ?? 'Unknown';
+    final displayName = schedule.profileDisplayName ?? username;
+    final avatarUrl = schedule.profileAvatarUrl;
 
     return Container(
       decoration: BoxDecoration(
@@ -440,28 +442,24 @@ class _ScheduleDetailViewState extends ConsumerState<ScheduleDetailView> {
             child: Row(
               children: [
                 // 프로필 이미지
-                Container(
+                avatarUrl != null
-                  width: 40,
+                    ? ClipOval(
-                  height: 40,
+                        child: CachedNetworkImage(
-                  decoration: BoxDecoration(
+                          imageUrl: avatarUrl,
-                    gradient: LinearGradient(
+                          width: 40,
-                      begin: Alignment.topLeft,
+                          height: 40,
-                      end: Alignment.bottomRight,
+                          fit: BoxFit.cover,
-                      colors: [Colors.grey[700]!, Colors.grey[900]!],
+                          placeholder: (_, _) => Container(
-                    ),
+                            width: 40, height: 40,
-                    shape: BoxShape.circle,
+                            decoration: BoxDecoration(
-                  ),
+                              color: Colors.grey[300],
-                  child: Center(
+                              shape: BoxShape.circle,
-                    child: Text(
+                            ),
-                      displayName[0].toUpperCase(),
+                          ),
-                      style: const TextStyle(
+                          errorWidget: (_, _, _) => _buildAvatarFallback(displayName),
-                        color: Colors.white,
+                        ),
-                        fontWeight: FontWeight.bold,
+                      )
-                        fontSize: 16,
+                    : _buildAvatarFallback(displayName),
-                      ),
-                    ),
-                  ),
-                ),
                 const SizedBox(width: 12),
                 Expanded(
                   child: Column(
@@ -484,7 +482,7 @@ class _ScheduleDetailViewState extends ConsumerState<ScheduleDetailView> {
                         ],
                       ),
                       Text(
-                        '@$displayName',
+                        '@$username',
                         style: TextStyle(
                           fontSize: 13,
                           color: Colors.grey[500],
@@ -691,6 +689,32 @@ class _ScheduleDetailViewState extends ConsumerState<ScheduleDetailView> {
     );
   }
 
+  /// 아바타 폴백 (이니셜)
+  Widget _buildAvatarFallback(String name) {
+    return Container(
+      width: 40,
+      height: 40,
+      decoration: BoxDecoration(
+        gradient: LinearGradient(
+          begin: Alignment.topLeft,
+          end: Alignment.bottomRight,
+          colors: [Colors.grey[700]!, Colors.grey[900]!],
+        ),
+        shape: BoxShape.circle,
+      ),
+      child: Center(
+        child: Text(
+          name[0].toUpperCase(),
+          style: const TextStyle(
+            color: Colors.white,
+            fontWeight: FontWeight.bold,
+            fontSize: 16,
+          ),
+        ),
+      ),
+    );
+  }
+
   /// 인증 배지
   Widget _buildVerifiedBadge() {
     return SizedBox(