- Add warehouse and bin_location columns to Inventory model - Create inventory_import_service for bulk TSV/CSV import - Add POST /api/v1/admin/inventory/import endpoint - Add Import button and modal to inventory admin page - Support both single-unit rows and explicit QUANTITY column File format: BIN, EAN, PRODUCT (optional), QUANTITY (optional) Products matched by GTIN/EAN, unmatched items reported. 🤖 Generated with [Claude Code](https://claude.com/claude-code) Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>