refactor(housekeeping): modal confirm, bulk delete, search debounce, audit inline, form reset

- Replace browser confirm() with custom ConfirmModal component
- Add search debounce (300ms) before syncing URL params
- Reset add-permission form after successful submit
- Add bulk select/delete with checkbox column and bulkDeletePermissions action
- AuditSection fetches logs server-side via getAuditLogs and shows inline table
- Add 10 new i18n keys (cancel, confirm, confirmDeletePermission,
  confirmBulkDelete, deleteSelected, confirmClearAllDesc,
  auditTime, auditUser, auditAction, auditTarget) synced to all 22 locales

src/actions/admin-housekeeping.ts

@@ -870,4 +870,27 @@ export async function clearAllPermissions(): Promise<void> {
 	revalidatePath("/admin/housekeeping");
 }
 
+export async function bulkDeletePermissions(
+	ids: bigint[],
+): Promise<{ count: number }> {
+	await requirePermission(PERMS.SETTINGS_EDIT);
+
+	if (!ids.length) return { count: 0 };
+
+	const userId = await currentUserId();
+
+	await prisma.websiteHousekeepingPermissions.deleteMany({
+		where: { id: { in: ids } },
+	});
+
+	await logAudit({
+		userId: userId ?? 0,
+		action: "housekeeping.permission.bulk_delete",
+		target: "WebsiteHousekeepingPermissions",
+		after: { deletedCount: ids.length },
+	});
+
+	revalidatePath("/admin/housekeeping");
+	return { count: ids.length };
+}