feat: add CSV/JSON export, advanced bulk filters & selection to Catalog Manager

- Admin Audit Log: CSV/JSON export via ?format=query param
- Catalog Manager: club_only / have_offer filters (multi-filter support)
- Offer discovery: refactored discoverOffers() to accept filters object
- Translations added for new filter labels
- Test updates for all modified paths

src/app/admin/logs/audit/audit-table.tsx

@@ -134,12 +134,27 @@ export function AuditTable({ data }: AuditTableProps) {
 	return (
 		<div className="space-y-4">
 			<AuditFilters />
-			<p className="text-xs text-muted-foreground">{t("audit.exportHint")}</p>
+			<div className="flex items-center justify-between">
+				<p className="text-xs text-muted-foreground">{t("audit.exportHint")}</p>
+				<div className="flex items-center gap-2">
+					<a
+						href={`/api/admin/logs/audit/export?${params.toString()}&format=csv`}
+						className="inline-flex items-center justify-center rounded-md border border-input bg-background px-3 py-1.5 text-xs font-medium shadow-sm hover:bg-accent hover:text-accent-foreground"
+					>
+						Export CSV
+					</a>
+					<a
+						href={`/api/admin/logs/audit/export?${params.toString()}&format=json`}
+						className="inline-flex items-center justify-center rounded-md border border-input bg-background px-3 py-1.5 text-xs font-medium shadow-sm hover:bg-accent hover:text-accent-foreground"
+					>
+						Export JSON
+					</a>
+				</div>
+			</div>
 			<DataTable
 				data={data}
 				columns={columns}
 				searchPlaceholder={t("audit.searchPlaceholder")}
-				exportUrl={`/api/admin/logs/audit/export?${params.toString()}`}
 			/>
 		</div>
 	);