feat(ui): Quick-Toggles, Config-Preview, Dashboard-Alerts, Domain-Detail-Health
Quick-Toggle-Switches (kein Modal nötig) für: Backends, Backend-Server,
DNS-Zonen, DNS-Records, Domains (active), Firewall-Rules, NAT-Rules,
Forward-Proxy ACLs, Routing-Rules.
Dashboard: Alert-Banner für komplett ausgefallene Backends (HAProxy-Stats)
und Domains im Maintenance-Mode.
Domain-Detail: HAProxy-Live-Health-Badge (15s Polling), TLS-Cert
ausstellen/erneuern direkt aus dem Detail, Routing-Rules-Panel inline.
Config-Preview (Settings): alle 4 Generatoren (haproxy, nftables, squid,
unbound) rendern via RenderToString ohne Disk-Write — GET /system/config-preview.
ActionButtons: Viewer-Rolle blendet Delete aus (RBAC-Ergänzung).
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
99982ef9d1