feat(ui): 添加空态和骨架组件

src/components/ui.tsx

@@ -152,3 +152,30 @@ export function SectionTitle({ icon, title, description }: { icon?: ReactNode; t
     </div>
   )
 }
+
+export function Skeleton({ className, ...props }: ComponentPropsWithoutRef<'div'>) {
+  return <div className={cn('rounded-md bg-white/5 motion-safe:animate-pulse', className)} {...props} />
+}
+
+export function EmptyState({
+  icon,
+  title,
+  description,
+  action,
+  className,
+}: {
+  icon?: ReactNode
+  title: string
+  description?: string
+  action?: ReactNode
+  className?: string
+}) {
+  return (
+    <div className={cn('flex flex-col items-center justify-center py-12 text-center', className)}>
+      {icon && <div className="mb-4 text-zinc-500">{icon}</div>}
+      <h3 className="text-sm font-medium text-zinc-200">{title}</h3>
+      {description && <p className="mt-1 text-sm text-zinc-500 max-w-sm">{description}</p>}
+      {action && <div className="mt-6">{action}</div>}
+    </div>
+  )
+}