Proxy paths (/app/name/) break iframes due to root-relative asset
paths. Direct IP:port access works correctly over Tailscale and LAN.
This has been confirmed working on .228 via Tailscale DNS.
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
Direct port access (http://host:port) fails over Tailscale/VPN and
when ports aren't externally accessible. Now all apps use nginx proxy
paths (/app/name/) on both HTTP and HTTPS.
Also adds missing proxy paths for btcpay, nextcloud, penpot, grafana,
indeedhub. Bumps version to 1.3.1.
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>