fix: propagate error when no channels are enabled during startup (#897)

cmd/picoclaw/internal/gateway/helpers.go

@@ -175,6 +175,7 @@ func gatewayCmd(debug bool) error {
 
 	if err := channelManager.StartAll(ctx); err != nil {
 		fmt.Printf("Error starting channels: %v\n", err)
+		return err
 	}
 
 	fmt.Printf("✓ Health endpoints available at http://%s:%d/health and /ready\n", cfg.Gateway.Host, cfg.Gateway.Port)

pkg/channels/manager.go

@@ -313,7 +313,7 @@ func (m *Manager) StartAll(ctx context.Context) error {
 
 	if len(m.channels) == 0 {
 		logger.WarnC("channels", "No channels enabled")
-		return nil
+		return errors.New("no channels enabled")
 	}
 
 	logger.InfoC("channels", "Starting all channels")