EMSYS Inventory

New optimized inventory API (server-side), enabled by default — same field-tested behavior, verified to match the previous data exactly across stock, inventory objects, and fixed assets. Automatic unit conversion when scanning box/pallet barcodes — quantity is converted to the base unit at save time; the scanned code stays visible on screen. New "sent, no response" status for documents affected by slow network conditions — the app no longer risks marking a document as failed when it may have already reached the server. Added a database reset option in Settings, for a clean slate when switching ERP servers. Various reliability fixes in data import and document upload.