feat: add admin operations suite

src/app/admin/online/loading.tsx

@@ -0,0 +1,28 @@
+import { Skeleton } from '@/components/ui/skeleton'
+
+export default function OnlineLoading() {
+  return (
+    <div className="space-y-6">
+      <div className="flex items-center justify-between">
+        <div>
+          <Skeleton className="h-9 w-40" />
+          <Skeleton className="h-5 w-64 mt-2" />
+        </div>
+      </div>
+      <div className="flex items-center gap-3">
+        <Skeleton className="h-10 w-64" />
+        <Skeleton className="h-10 w-24" />
+      </div>
+      <div className="rounded-md border">
+        {Array.from({ length: 8 }).map((_, i) => (
+          <div key={i} className="flex items-center gap-6 px-4 py-3 border-b last:border-0">
+            <Skeleton className="h-4 w-12" />
+            <Skeleton className="h-4 w-32" />
+            <Skeleton className="h-4 w-24" />
+            <Skeleton className="h-5 w-16 rounded-full" />
+          </div>
+        ))}
+      </div>
+    </div>
+  )
+}