[Invoices] Added support for registering Poczta Polska deliveries as Pocztex 2.0, alongside the existing registered letter option
[Invoices] After registering Poczta Polska shipments, users can now download the Posting book and Poczta Firmowa summary directly from SmartCP
[Invoices] Added a warning when issuing an invoice for a transport order if other orders with the same order number exist in the system
[Dispo-Plan] Improved vehicle filter behavior when multiple filter categories are selected together
[Orders] Added support for uploading and downloading .eml email files as order attachments
[Forwarding: Orders] Fixed filtering for additional forwarding orders, so parent orders are shown when a related additional order matches selected filters; Also fixed invoice number visibility for additional orders after invoicing