Merge #638: bind the frontend error-state retry callback

skills/frontend-ui-engineering/SKILL.md

@@ -79,7 +79,7 @@ export function TaskItem({ task, onToggle, onDelete }: TaskItemProps) {
 ```tsx
 // Container: handles data
 export function TaskListContainer() {
-  const { tasks, isLoading, error } = useTasks();
+  const { tasks, isLoading, error, refetch } = useTasks();
 
   if (isLoading) return <TaskListSkeleton />;
   if (error) return <ErrorState message="Failed to load tasks" retry={refetch} />;