Fix DHT bootstrap URL parsing and transcoding completion handler

internal/dht/bootstrap.go

@@ -5,6 +5,7 @@ import (
 	"fmt"
 	"log"
 	"net"
+	"net/url"
 	"sync"
 	"time"
 
@@ -518,13 +519,21 @@ func (d *DHTBootstrap) Stop() error {
 // Helper functions
 
 // extractHostname extracts hostname from URL
-func extractHostname(url string) string {
-	// Simple URL parsing - in production use net/url
-	if host, _, err := net.SplitHostPort(url); err == nil {
+func extractHostname(urlStr string) string {
+	// Parse the URL properly
+	if u, err := url.Parse(urlStr); err == nil {
+		// Extract hostname without port
+		if host, _, err := net.SplitHostPort(u.Host); err == nil {
 			return host
 		}
-	// Fallback for URLs without port
-	return url
+		// If no port in URL, return the host directly
+		return u.Host
+	}
+	// Fallback - assume it's already just a hostname
+	if host, _, err := net.SplitHostPort(urlStr); err == nil {
+		return host
+	}
+	return urlStr
 }
 
 // isValidNodeID checks if a node ID is valid