style: align search bar with title horizontally

- Remove justify-between to place the search bar and filter controls immediately next to the registry title and count description.

adminfront/src/features/users/UserListPage.tsx

@@ -465,7 +465,7 @@ function UserListPage() {
       </header>
 
       <Card className="flex-1 flex flex-col min-h-0 bg-[var(--color-panel)] overflow-hidden">
-        <CardHeader className="flex flex-wrap items-end justify-between gap-4 flex-shrink-0">
+        <CardHeader className="flex flex-wrap items-end gap-8 flex-shrink-0">
           <div>
             <CardTitle>
               {t("ui.admin.users.list.registry.title", "사용자 레지스트리")}