feat(vortex-dns): Add LuCI dashboard for mesh DNS management
New package: luci-app-vortex-dns
- Dashboard showing mode, status, sync info
- Master section with delegated zones table
- Slave section with parent master info
- Mesh peers section with online status
- Actions: Initialize master, Join slave, Delegate zone, Mesh sync
- RPCD handler with 8 methods
Also fixes:
- Mail port hijacking: WAN-only DNAT rules
- Threat-analyst LocalAI port: 8081 → 8091
- Domoticz password reset
Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>