- Fix Docker build issues:
* Add missing system dependencies (build-essential, python3-dev, libpq-dev)
* Fix requirements.txt formatting (separate Flask-Session and openpyxl)
* Update openpyxl version to 3.1.5 (3.10.0 was invalid)
- Set proper folder permissions for Docker write access (app/ and data/)
- Add comprehensive test data for labels module:
* 8 sample orders (TEST-ORD-001 through TEST-ORD-008)
* Mix of printed/unprinted orders for testing
* Various product types, customers, and delivery dates
* Ready for QZ Tray printing functionality testing
- Include test data generation scripts for future use
- Application now fully containerized and ready for labels/printing testing
- Created import_labels.py with CSV and Excel file processing
- Implemented validation for order rows and date format handling
- Added import-labels route with preview and save functionality
- Created import_labels.html template with new app UI styling
- Added import card to labels module index
- Added openpyxl to requirements.txt for Excel support
