Light/dark theme and compact mobile layout, per-client speed limit, real
speed tests, panel domain (Let's Encrypt), client address + cascade relay,
RKN scanner guard, WARP, backup/restore, router web terminal, Android VPN
client with split tunnelling and Android admin app. Updating from 1.2.x
keeps keys, server.env and clients; tested 1.2.8 -> 1.4.0 on live VMs.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
