fix(firewall): fehlende onError-Handler + i18n in Rules + NATRules

- 6 Mutations (create/update/del je Rules + NATRules) bekommen onError-Handler
- Deutsche Placeholder-Texte → t() überführt
- Action-Labels (accept/drop/reject) und Kind-Labels (any/object/group/cidr)
  in t() überführt statt hardkodiert anzeigen
- CIDR-Label-Hardkodierung in Rules-Formular behoben
- en/de: fw.rule.actions.*, fw.rule.kinds.*, fw.rule.namePlaceholder,
  fw.nat.namePlaceholder ergänzt

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

cmd/edgeguard-api/main.go

@@ -60,7 +60,7 @@ import (
 	usersvc "git.netcell-it.de/projekte/edgeguard-native/internal/services/users"
 )
 
-var version = "1.1.82"
+var version = "1.1.83"
 
 func main() {
 	addr := os.Getenv("EDGEGUARD_API_ADDR")

cmd/edgeguard-ctl/main.go

@@ -11,7 +11,7 @@ import (
 	"git.netcell-it.de/projekte/edgeguard-native/internal/services/setup"
 )
 
-var version = "1.1.82"
+var version = "1.1.83"
 
 const usage = `edgeguard-ctl — EdgeGuard CLI
 

cmd/edgeguard-scheduler/main.go

@@ -35,7 +35,7 @@ import (
 	"git.netcell-it.de/projekte/edgeguard-native/internal/services/tlscerts"
 )
 
-var version = "1.1.82"
+var version = "1.1.83"
 
 const (
 	// renewTickInterval — how often we re-evaluate expiring certs.