Fix theme consistency, i18n completeness, CSS variable naming, and hardcoded strings

src/app/admin/catalog/[id]/page.tsx

@@ -122,7 +122,7 @@ export default async function AdminCatalogPage({
           </thead>
           <tbody>
             {items.map((it) => (
-              <tr key={it.id} style={{ borderTop: "1px solid var(--border)" }}>
+              <tr key={it.id} style={{ borderTop: "1px solid var(--border-subtle)" }}>
                 <td>{it.id}</td>
                 <td>
                   {it.catalogName}