feat: Update node label format to Name (Type) without outer parentheses

internal/config/network_map.go

@@ -1,5 +1,7 @@
 package config
 
+import "fmt"
+
 // NodeType represents the type of network node
 type NodeType string
 
@@ -56,7 +58,7 @@ func (nm *NetworkMap) FindByIP(ip string) *NetworkNode {
 // LabelForIP returns a human-readable label for an IP, or the IP itself if unknown
 func (nm *NetworkMap) LabelForIP(ip string) string {
 	if node := nm.FindByIP(ip); node != nil {
-		return node.Name
+		return fmt.Sprintf("%s (%s)", node.Name, node.Type)
 	}
 	return ip
 }