- get_device_warnings(): checks /etc/apt/apt.conf.d/00proxy on apt systems (only when apt_proxy_url is set via optional_args from NetOrk settings) - _action_fix_apt_proxy(): writes the proxy config via sudo, uses base64 to avoid quoting issues - run_device_action(): routes 'fix_apt_proxy' to the new method Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>