Add --slug flag to reuse a specific subdomain across sessions

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

cmd/client/main.go

@@ -37,6 +37,7 @@ func main() {
 	tokenFlag := flag.String("token", "", "Authentication token (overrides config)")
 	hostHeaderFlag := flag.String("host-header", "", "Custom Host header to send to local service")
 	localHttpsFlag := flag.Bool("local-https", false, "Use HTTPS to connect to local service (implied if port is 443)")
+	slugFlag := flag.String("slug", "", "Request a specific subdomain slug (e.g., myapp)")
 	flag.Parse()
 
 	// Load config
@@ -58,7 +59,7 @@ func main() {
 		serverAddr = "localhost:2222"
 	}
 
-	m := tui.InitialModel(*localPort, serverAddr, authToken, *hostHeaderFlag, *localHttpsFlag)
+	m := tui.InitialModel(*localPort, serverAddr, authToken, *hostHeaderFlag, *localHttpsFlag, *slugFlag)
 	p := tea.NewProgram(m, tea.WithAltScreen())
 
 	if _, err := p.Run(); err != nil {