[feat] add Windows pre-login remote control and fix autostart

apps/desktop/src/gui/application/gui_application.h

@@ -29,6 +29,9 @@ public:
   ~GuiApplication();
 
   int Run();
+#ifdef _WIN32
+  int RunUnattended(void* stop_event);
+#endif
 
 private:
   struct SlintUi;

apps/desktop/src/gui/features/devices/session_device_manager.cpp

@@ -115,7 +115,7 @@ void SessionDeviceManager::RecordCaptureCadence(
 }
 
 void SessionDeviceManager::Initialize() {
-  InitializeAudioOutput();
+  if (!owner_.unattended_host_) InitializeAudioOutput();
   screen_capturer_factory_ = new ScreenCapturerFactory();
   device_controller_factory_ = new DeviceControllerFactory();
   keyboard_capturer_ =
@@ -329,6 +329,7 @@ void SessionDeviceManager::ReleaseRemoteMouseButtons() {
 #endif
 
 void SessionDeviceManager::StartSpeakerCapturer() {
+  if (owner_.unattended_host_) return;
   speaker_capture_.SetEnabled(true);
 }
 

apps/desktop/src/gui/features/settings/settings_manager.cpp

@@ -229,6 +229,13 @@ bool SettingsManager::ReadV2Locked() {
   return true;
 }
 
+std::string SettingsManager::ActiveIdentity() const {
+  std::lock_guard<std::mutex> lock(cache_mutex_);
+  return owner_.config_center_->IsSelfHosted()
+             ? cache_v2_.self_hosted_id
+             : cache_v2_.client_id_with_password;
+}
+
 int SettingsManager::Load() {
   std::unique_lock<std::mutex> lock(cache_mutex_);
 

apps/desktop/src/gui/features/settings/settings_manager.h

@@ -20,6 +20,7 @@ public:
 
   int Save();
   int Load();
+  std::string ActiveIdentity() const;
 
   int LoadRecentConnectionAliases();
   int SaveRecentConnectionAliases() const;

apps/desktop/src/gui/render.cpp

@@ -11,5 +11,10 @@ Render::Render() : application_(std::make_unique<GuiApplication>()) {}
 Render::~Render() = default;
 
 int Render::Run() { return application_->Run(); }
+#ifdef _WIN32
+int Render::RunUnattended(void* stop_event) {
+  return application_->RunUnattended(stop_event);
+}
+#endif
 
 } // namespace crossdesk

apps/desktop/src/gui/render.h

@@ -24,6 +24,9 @@ public:
   Render &operator=(const Render &) = delete;
 
   int Run();
+#ifdef _WIN32
+  int RunUnattended(void* stop_event);
+#endif
 
 private:
   std::unique_ptr<GuiApplication> application_;

apps/desktop/src/gui/runtime/gui_runtime.h

@@ -100,6 +100,8 @@ class GuiRuntime : protected gui_detail::GuiState {
 #endif
 
   PrivacyController privacy_;
+  // Set before initializing callbacks; immutable for the process lifetime.
+  bool unattended_host_ = false;
   AnnouncementInbox announcements_;
   PrivacySessionPolicy privacy_sessions_;
   std::mutex privacy_commands_mutex_;

apps/desktop/src/gui/runtime/peer_data_callbacks.cpp

@@ -91,6 +91,13 @@ void PeerEventHandler::OnReceiveDataBuffer(
   }
 
   std::string source_id = std::string(src_id, src_id_size);
+  // The service-owned host runs as SYSTEM. Do not expose filesystem or
+  // clipboard operations in that security context.
+  if (runtime->unattended_host_ &&
+      (source_id == runtime->file_label_ ||
+       source_id == runtime->file_feedback_label_ ||
+       source_id == runtime->clipboard_label_))
+    return;
   if (source_id == runtime->file_label_) {
     std::string remote_user_id = std::string(user_id, user_id_size);
 
@@ -209,6 +216,7 @@ void PeerEventHandler::OnReceiveDataBuffer(
     return;
   }
   if (remote_action.type == ControlType::privacy_command) {
+    if (runtime->unattended_host_) return;
     if (source_id == runtime->control_data_label_)
       runtime->QueuePrivacyCommand(remote_id, remote_action.pc);
     return;

apps/desktop/src/gui/runtime/peer_event_handler.cpp

@@ -278,8 +278,8 @@ void PeerEventHandler::OnConnectionStatus(ConnectionStatus status,
         {
           RemoteAction remote_action = MakeHostInformation(
               GetHostName(), runtime->devices_.host_display_list(),
-              /*supports_privacy_screen=*/true, CROSSDESK_VERSION,
-              kClientPlatform);
+              /*supports_privacy_screen=*/!runtime->unattended_host_,
+              CROSSDESK_VERSION, kClientPlatform);
           remote_action.i.supports_video_settings = true;
           for (std::size_t i = 0; i < remote_action.i.display_num; i++) {
             LOG_INFO("Local display [{}:{}]", i + 1,
@@ -413,8 +413,8 @@ void PeerEventHandler::OnConnectionStatus(ConnectionStatus status,
         {
           RemoteAction remote_action = MakeHostInformation(
               GetHostName(), runtime->devices_.host_display_list(),
-              /*supports_privacy_screen=*/true, CROSSDESK_VERSION,
-              kClientPlatform);
+              /*supports_privacy_screen=*/!runtime->unattended_host_,
+              CROSSDESK_VERSION, kClientPlatform);
           remote_action.i.supports_video_settings = true;
           for (std::size_t i = 0; i < remote_action.i.display_num; i++) {
             LOG_INFO("Local display [{}:{}]", i + 1,

apps/desktop/src/gui/runtime/peer_media_callbacks.cpp

@@ -201,7 +201,7 @@ void PeerEventHandler::OnReceiveAudioBuffer(
   auto callback = handler->EnterCallback();
   if (!callback) return;
   GuiRuntime* runtime = handler ? &handler->owner_ : nullptr;
-  if (!runtime) {
+  if (!runtime || runtime->unattended_host_) {
     return;
   }