- Make app cross-platform compatible (Windows, Linux, macOS)
- Replace CUPS-only printer detection with platform-aware code
- Add Windows printer support using win32print/win32api
- Add macOS printer support using lpstat
- Keep Linux CUPS support
- Add requirements_windows.txt for Windows installation
- Add comprehensive WINDOWS_SETUP.md guide
- Fallback to PDF output on all platforms
- Tested on Linux, ready for Windows/macOS
- Update GUI title to 'Label Printing' with white text
- Add character limit (25 chars) to all input fields
- Add number-only filter to quantity field
- Fix barcode generation in PDF module
- Create pdf_backup folder for storing generated PDFs
- Add pdf backup logging and confirmation
- Move demo files and tests to documentation folder
- Reorganize project structure for better clarity
- Removed tkinter/ImageTk imports from print_label.py
- Simplified preview function to use command-line countdown
- Application now works without GUI framework dependencies
- Added test_functional.py: Comprehensive functional test suite (5/5 PASS)
- Added demo_usage.py: Functional demonstration
- Added TEST_REPORT.md: Complete testing report
- All core functionality verified and working
- GUI ready for deployment on compatible systems
