MY 화면에 로그아웃(확인 후 로그인 화면으로 복귀) 추가

app/lib/core/router/app_router.dart

@@ -136,7 +136,7 @@ GoRouter buildRouter(AuthRepository auth, {FeatureFlags? flags}) {
             routes: [
               GoRoute(
                 path: appTabs[4].path,
-                builder: (_, _) => const MyScreen(),
+                builder: (_, _) => MyScreen(auth: auth),
               ),
             ],
           ),

app/lib/core/ui/tab_placeholder.dart

@@ -13,6 +13,7 @@ class TabPlaceholder extends StatelessWidget {
     required this.tab,
     required this.screenId,
     required this.screenName,
+    this.footer,
   });
 
   /// 계약 고정 탭 라벨(견적서 v2.1 5탭).
@@ -20,6 +21,9 @@ class TabPlaceholder extends StatelessWidget {
   final String screenId;
   final String screenName;
 
+  /// 자리표시 아래에 붙는 동작(예: MY 의 로그아웃). 없으면 그리지 않는다.
+  final Widget? footer;
+
   @override
   Widget build(BuildContext context) {
     final text = Theme.of(context).textTheme;
@@ -55,6 +59,10 @@ class TabPlaceholder extends StatelessWidget {
                   ],
                 ),
               ),
+              if (footer != null) ...[
+                const SizedBox(height: AppSpace.s5),
+                footer!,
+              ],
             ],
           ),
         ),