전역 구조 리팩터링 및 테스트 확장

lib/widgets/app_layout.dart

@@ -35,15 +35,8 @@ class AppLayout extends StatelessWidget {
               _BreadcrumbBar(items: breadcrumbs),
               const SizedBox(height: 16),
             ],
-            PageHeader(
-              title: title,
-              subtitle: subtitle,
-              actions: actions,
-            ),
-            if (toolbar != null) ...[
-              const SizedBox(height: 16),
-              toolbar!,
-            ],
+            PageHeader(title: title, subtitle: subtitle, actions: actions),
+            if (toolbar != null) ...[const SizedBox(height: 16), toolbar!],
             const SizedBox(height: 24),
             child,
           ],
@@ -54,11 +47,7 @@ class AppLayout extends StatelessWidget {
 }
 
 class AppBreadcrumbItem {
-  const AppBreadcrumbItem({
-    required this.label,
-    this.path,
-    this.onTap,
-  });
+  const AppBreadcrumbItem({required this.label, this.path, this.onTap});
 
   final String label;
   final String? path;
@@ -94,7 +83,10 @@ class _BreadcrumbBar extends StatelessWidget {
               size: 14,
               color: colorScheme.mutedForeground,
             ),
-          _BreadcrumbChip(item: items[index], isLast: index == items.length - 1),
+          _BreadcrumbChip(
+            item: items[index],
+            isLast: index == items.length - 1,
+          ),
         ],
       ],
     );
@@ -113,7 +105,9 @@ class _BreadcrumbChip extends StatelessWidget {
     final label = Text(
       item.label,
       style: theme.textTheme.small.copyWith(
-        color: isLast ? theme.colorScheme.foreground : theme.colorScheme.mutedForeground,
+        color: isLast
+            ? theme.colorScheme.foreground
+            : theme.colorScheme.mutedForeground,
       ),
     );