Revert "Add missing admin action files and navigation links"

This reverts commit 41be6835bf.

src/app/admin/catalog/[id]/catalog-items-table.tsx

@@ -1,7 +0,0 @@
-/**
- * Re-export barrel for backward compatibility.
- * Implementation moved to ./catalog-items-table/ directory.
- */
-export { CatalogItemsTable } from './catalog-items-table/catalog-items-table'
-export { FurniIcon } from './catalog-items-table/furni-icon'
-export type { BaseItemData, CatalogItemData } from './catalog-items-table/types'