fix: enforce semantic contrast across admin

src/app/admin/bans/page.tsx

@@ -104,11 +104,11 @@ export default async function AdminBans() {
                     <td>{b.banReason || "—"}</td>
                     <td>
                       {b.banExpire === 0 ? (
-                        <span className="inline-block text-[0.72rem] font-bold px-2 py-0.5 rounded-full bg-red-500/22 text-[var(--color-text)]">
+                        <span className="inline-block text-[0.72rem] font-bold px-2 py-0.5 rounded-full bg-[var(--color-error-subtle)] text-[var(--color-text)]">
                           {t("permanent")}
                         </span>
                       ) : (
-                        <span className="text-sm text-gray-500 dark:text-gray-400 whitespace-nowrap">
+                        <span className="text-sm theme-text-muted dark:theme-text-muted whitespace-nowrap">
                           {fromUnix(b.banExpire)}
                         </span>
                       )}