- Remove "direct" gateway, use socks5:// proxies for all checks
- Add IPv6 proxy addresses for dual-stack gateway checking
- beget nodes have no IPv6 (proxy_v6=None), correctly shown as NOIP
- Add egw/dgw/igw to sidebar under Маршрутизаторы section
- Sort all sidebar items alphabetically within sections
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>