- Fixed AttributeError: 'AutoInstallerGUI' object has no attribute 'log'
- Replaced self.log() call with print() in detect_default_disk method
- The log method is only available in InstallerWorker class, not AutoInstallerGUI
- This resolves the crash when running frozen PyInstaller binary
- Maintains logging functionality for disk detection without breaking frozen binary

This fixes the PyInstaller frozen binary crash that occurred during GUI initialization
when trying to auto-detect the default installation disk.