- serial_port.py: replace termios/fcntl/select with pyserial wrapper,
same SerialPort interface preserved for all other modules
- workflow_serial.py: detect_serial_device() uses serial.tools.list_ports
to enumerate COM ports; removes _fix_permissions() (not needed on Windows);
multi-device table now shows port description
- es24n_conf.py: enable VT/ANSI colour mode on Windows 10+ via ctypes;
update docstring for Windows edition
- requirements.txt: pyserial >= 3.5, pyinstaller >= 6.0
- es24n_conf.spec: PyInstaller single-file .exe spec
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
