The original GET route used a correlated NOT EXISTS / FIND_IN_SET subquery over the entire catalog_items table for every recent import audit entry, causing server timeouts when the audit log or catalog grew large. The per-item host-page validation inside the create action also issued one SELECT + one UPDATE per moved offer. Changes: - GET /api/admin/import/organize: replace the correlated subquery with a bounded candidate list and a JS-side placed-set check, then resolve all needed base items in a single indexed SELECT. This bounds the query cost regardless of catalog or audit log size. - organizeImportFurni action: validate mover ids in one SELECT, then batch every move per group into a single UPDATE with a CASE expression instead of one UPDATE per item. - OrganizeImportsDialog: add a 45-second abort timeout on the fetch and a distinct load-error state so the UI never silently hangs. - Add 'loadError' translation key (en + nl).