feat: add local auth billing and usage management

app/usage/page.tsx

@@ -0,0 +1,10 @@
+import { UsageManager } from "@/components/usage-manager";
+import { hasSuperAdminAccess } from "@/lib/auth/permissions";
+import { requireAdminSession } from "@/lib/server/auth/current-user";
+
+export const dynamic = "force-dynamic";
+
+export default async function UsagePage() {
+  const session = await requireAdminSession();
+  return <UsageManager isSuperAdmin={hasSuperAdminAccess(session.user)} />;
+}