bb4b2f4162
- board: detect cuaU* serial ports in fallback scanner, filter .init/.lock nodes - board: fall through to OS scan when arduino-cli returns empty (serial-discovery uses unsupported Linux syscalls on FreeBSD) - board: recognize cuaU* port names as USB in is_usb() - upload.sh: fix silent exit under set -euo pipefail when vid_pid grep finds nothing (|| true on LOCAL_PORT and LOCAL_VID_PID greps) - upload.sh: add cuaU to auto-detect port pattern - doctor: detect dialer and operator group membership, offer --fix for both - doctor: detect avr-size installed but not on PATH, offer --fix to add to shell rc file via detect_shell_rc() - doctor: context-aware hardware section (suppress misleading messages when groups not yet applied) - doctor: FreeBSD-specific troubleshooting hints throughout - devices: suppress arduino-cli board detection section on FreeBSD (broken due to serial-discovery syscall issues) - devices: always show USB hub tip on FreeBSD - devices: FreeBSD-specific troubleshooting checklist with sequential numbering on all platforms