Added module-wide settings export/import with a JSON preview workflow. Migrated shipping methods export/import to JSON, keeping a CSV import fallback. Showed estimated import duties and taxes on the checkout summary. Scoped rate warnings to the carrier that produced them and surfaced them at checkout when debug is enabled. Switched admin templates to the Escaper service and secureRenderer. Moved AccessPoint popup callback HTML/JS into an external renderer. Dropped Zend_Pdf and aligned signatures for PHP 8.5 and newer libraries.