[fix] apply settings without reconnecting signaling

apps/desktop/src/config_center/signal_server_settings.h

@@ -0,0 +1,29 @@
+/*
+ * @Author: DI JUNKUN
+ * @Date: 2026-10-09
+ * Copyright (c) 2026 by DI JUNKUN, All Rights Reserved.
+ */
+
+#ifndef _SIGNAL_SERVER_SETTINGS_H_
+#define _SIGNAL_SERVER_SETTINGS_H_
+
+#include <tuple>
+
+#include "config_center.h"
+
+namespace crossdesk {
+
+// Include the identity namespace as well as the effective endpoint. Editing
+// an inactive self-hosted endpoint must not disconnect the public server.
+inline auto GetSignalServerSettings(const ConfigCenter& config) {
+  const bool self_hosted = config.IsSelfHosted();
+  return std::make_tuple(
+      self_hosted,
+      self_hosted ? config.GetSignalServerHost() : config.GetDefaultServerHost(),
+      self_hosted ? config.GetSignalServerPort()
+                  : config.GetDefaultSignalServerPort());
+}
+
+}  // namespace crossdesk
+
+#endif