feat: Unbound DNS-Resolver — vollständig (Renderer + Handler + UI)

Stub raus, vollständig implementiert:

* Migration 0014: dns_settings (single-row) + dns_zones.forward_to.
  Default-Settings sind sinnvoll für die typische LAN-Resolver-Rolle
  (1.1.1.1 + 9.9.9.9 upstream, localnet allow, DNSSEC + qname-min on).
* internal/services/dns: CRUD-Repo für zones, records, settings.
* internal/handlers/dns.go: REST /api/v1/dns/zones, /records, /settings
  mit Auto-Reload nach jeder Mutation.
* internal/unbound/unbound.cfg.tpl + unbound.go: Renderer schreibt
  /etc/unbound/unbound.conf.d/edgeguard.conf direkt (kein Symlink-
  Dance, weil AppArmor unbound nur /etc/unbound erlaubt). Local-zones
  authoritativ aus dns_records; forward-zones per stub-zone; default-
  forwarders catchen alles sonst.
* main.go: dnsRepo + unbound-Reloader injiziert.
* render.go: unbound.New() bekommt Pool.
* postinst:
  - Conf-Datei /etc/unbound/unbound.conf.d/edgeguard.conf wird als
    edgeguard:edgeguard 0644 angelegt damit Renderer schreiben kann.
  - /etc/edgeguard + Service-Subdirs auf 0755 (Squid + Unbound laufen
    NICHT als edgeguard, brauchen Read-Traversal).
  - Sudoers: systemctl reload unbound.service whitelisted.
* Template: chroot:"" (Conf liegt außerhalb /var/lib/unbound default-
  chroot), DNSSEC-Trust-Anchor NICHT setzen (Distro hat schon
  root-auto-trust-anchor-file.conf — sonst doppelter Anchor → start
  failure).
* Frontend /dns: PageHeader + zwei Tabs (Zones + Resolver-Settings).
  Zones-Tab mit Drawer für Records (CRUD pro Zone, A/AAAA/CNAME/TXT/
  MX/SRV/NS/PTR/CAA). Sidebar-Eintrag unter Network.
* i18n DE/EN für dns.* Block.

Verified end-to-end: render → unbound restart → dig @127.0.0.1
example.com → 104.20.23.154 / 172.66.147.243.

Version 1.0.34 (mehrere Iterationen wegen AppArmor + chroot + perms).

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

cmd/edgeguard-api/main.go

@@ -23,11 +23,13 @@ import (
 	"git.netcell-it.de/projekte/edgeguard-native/internal/haproxy"
 	"git.netcell-it.de/projekte/edgeguard-native/internal/handlers"
 	squidrender "git.netcell-it.de/projekte/edgeguard-native/internal/squid"
+	unboundrender "git.netcell-it.de/projekte/edgeguard-native/internal/unbound"
 	wgrender "git.netcell-it.de/projekte/edgeguard-native/internal/wireguard"
 	"git.netcell-it.de/projekte/edgeguard-native/internal/handlers/response"
 	"git.netcell-it.de/projekte/edgeguard-native/internal/services/acme"
 	"git.netcell-it.de/projekte/edgeguard-native/internal/services/audit"
 	"git.netcell-it.de/projekte/edgeguard-native/internal/services/backends"
+	dnssvc "git.netcell-it.de/projekte/edgeguard-native/internal/services/dns"
 	"git.netcell-it.de/projekte/edgeguard-native/internal/services/domains"
 	"git.netcell-it.de/projekte/edgeguard-native/internal/services/firewall"
 	"git.netcell-it.de/projekte/edgeguard-native/internal/services/forwardproxy"
@@ -41,7 +43,7 @@ import (
 	wgsvc "git.netcell-it.de/projekte/edgeguard-native/internal/services/wireguard"
 )
 
-var version = "1.0.26"
+var version = "1.0.34"
 
 func main() {
 	addr := os.Getenv("EDGEGUARD_API_ADDR")
@@ -144,6 +146,7 @@ func main() {
 		wgIfaces := wgsvc.NewInterfacesRepo(pool)
 		wgPeers := wgsvc.NewPeersRepo(pool)
 		fwdProxyRepo := forwardproxy.New(pool)
+		dnsRepo := dnssvc.New(pool)
 
 		// ACME (Let's Encrypt). Email comes from setup.json — the
 		// wizard collects acme_email and the issuer registers an
@@ -192,6 +195,13 @@ func main() {
 			return squidrender.New(pool).Render(ctx)
 		}
 		handlers.NewForwardProxyHandler(fwdProxyRepo, auditRepo, nodeID, squidReloader).Register(authed)
+
+		// Unbound DNS reload — re-render edgeguard.conf + reload
+		// unbound.service.
+		unboundReloader := func(ctx context.Context) error {
+			return unboundrender.New(pool).Render(ctx)
+		}
+		handlers.NewDNSHandler(dnsRepo, auditRepo, nodeID, unboundReloader).Register(authed)
 	}
 
 	mountUI(r)

cmd/edgeguard-ctl/main.go

@@ -9,7 +9,7 @@ import (
 	"os"
 )
 
-var version = "1.0.26"
+var version = "1.0.34"
 
 const usage = `edgeguard-ctl — EdgeGuard CLI
 

cmd/edgeguard-ctl/render.go

@@ -56,7 +56,7 @@ func cmdRenderConfig(args []string) int {
 	fw := firewall.New(pool)
 	sq := squid.New(pool)
 	wg := wireguard.New(pool, secrets.New(""))
-	ub := unbound.New()
+	ub := unbound.New(pool)
 	if skipReload {
 		hap.SkipReload = true
 		fw.SkipReload = true

cmd/edgeguard-scheduler/main.go

@@ -21,7 +21,7 @@ import (
 	"git.netcell-it.de/projekte/edgeguard-native/internal/services/tlscerts"
 )
 
-var version = "1.0.26"
+var version = "1.0.34"
 
 const (
 	// renewTickInterval — how often we re-evaluate expiring certs.