[fix] restore Linux Dock icons in packaged builds

apps/desktop/scripts/linux/package_deb.sh

@@ -1,6 +1,9 @@
 #!/usr/bin/env bash
 set -euo pipefail
 
+# Keep readelf and ldd output stable for the runtime dependency checks below.
+export LC_ALL=C
+
 if [[ $# -lt 3 || $# -gt 4 ]]; then
     echo "Usage: $0 <debian-arch> <xmake-arch> <version> [extra-recommendation]" >&2
     exit 2
@@ -169,11 +172,12 @@ EOF
 
 cat > "$DESKTOP_DIR/$PKG_NAME.desktop" <<EOF
 [Desktop Entry]
-Version=$DEB_VERSION
+Version=1.0
 Name=$APP_NAME
 Comment=$DESCRIPTION
 Exec=/usr/bin/$PKG_NAME
 Icon=$PKG_NAME
+StartupWMClass=$PKG_NAME
 Terminal=false
 Type=Application
 Categories=Utility;

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

@@ -1111,6 +1111,9 @@ void GuiApplication::InitializeUi() {
     wayland_display_guard.emplace("WAYLAND_DISPLAY");
     wayland_socket_guard.emplace("WAYLAND_SOCKET");
   }
+  // Match crossdesk.desktop even when the Debian launcher runs crossdesk-bin.
+  // Set this before creating any windows so X11 and Wayland share the same id.
+  slint::set_xdg_app_id("crossdesk");
 #endif
   ui_ = std::make_unique<SlintUi>();
   ui_->video_presenter =
@@ -1151,6 +1154,7 @@ void GuiApplication::InitializeSystemTray() {
     ui_->main->show();
     ui_->main->window().set_minimized(false);
 #if defined(__APPLE__)
+    MacActivateWindow(ui_->main->window().appkit_view());
     // A window restored from the tray may only obtain its NSWindow after the
     // callback returns, so let the regular UI tick configure it.
     ui_->main_native_titlebar_attempts = 30;
@@ -1161,16 +1165,12 @@ void GuiApplication::InitializeSystemTray() {
       ui_->main->hide();
     }
   };
-  auto open_settings = [this] {
+  auto open_settings = [this, show_window] {
     if (!ui_) {
       return;
     }
-    ui_->main->show();
-    ui_->main->window().set_minimized(false);
+    show_window();
     ui_->main->set_settings_open(true);
-#if defined(__APPLE__)
-    ui_->main_native_titlebar_attempts = 30;
-#endif
   };
   auto exit_app = [this] {
     exit_ = true;

apps/desktop/src/gui/ui/main_window.slint

@@ -186,6 +186,7 @@ component ConnectionDialogButton inherits Rectangle {
 
 export component MainWindow inherits Window {
     title: "CrossDesk";
+    icon: @image-url("../../../resources/linux/crossdesk_256x256.png");
     preferred-width: 640px;
     preferred-height: 450px + root.titlebar-height;
     min-width: 640px;

apps/desktop/src/gui/ui/server_window.slint

@@ -7,6 +7,7 @@ export struct ControllerEntry {
 
 export component ServerWindow inherits Window {
     title: "CrossDesk";
+    icon: @image-url("../../../resources/linux/crossdesk_256x256.png");
     preferred-width: root.language-index == 0 ? 250px : root.language-index == 1 ? 330px : 430px;
     preferred-height: 150px;
     min-width: root.language-index == 0 ? 250px : root.language-index == 1 ? 330px : 430px;

apps/desktop/src/gui/ui/stream_window.slint

@@ -111,6 +111,7 @@ component ControlBarButton inherits Rectangle {
 
 export component StreamWindow inherits Window {
     title: "CrossDesk";
+    icon: @image-url("../../../resources/linux/crossdesk_256x256.png");
     preferred-width: 1280px;
     preferred-height: 720px + (root.custom-titlebar ? 32px : 0px);
     min-width: 640px;

apps/desktop/src/platform/macos/gui/tray/mac_tray.h

@@ -17,6 +17,9 @@ namespace crossdesk {
 
 struct MacTrayImpl;
 
+// Activates the app and focuses the restored Slint window's current NSView.
+void MacActivateWindow(void* appkit_view);
+
 class MacTray {
  public:
   MacTray(::SDL_Window* app_window, const std::string& tooltip,

apps/desktop/src/platform/macos/gui/tray/mac_tray.mm

@@ -57,6 +57,8 @@ struct MacTrayImpl {
     } else if (app_window) {
       SDL_HideWindow(app_window);
     }
+    // Keep running through the menu-bar tray without a Dock application icon.
+    [NSApp setActivationPolicy:NSApplicationActivationPolicyAccessory];
   }
 
   void RemoveTrayIcon() {
@@ -69,6 +71,8 @@ struct MacTrayImpl {
   }
 
   void ShowWindow() {
+    // Restore normal application behavior before showing or focusing a window.
+    [NSApp setActivationPolicy:NSApplicationActivationPolicyRegular];
     if (show_window) {
       show_window();
     } else if (app_window) {
@@ -142,6 +146,7 @@ struct MacTrayImpl {
   }
 
   void OpenSettings() {
+    [NSApp setActivationPolicy:NSApplicationActivationPolicyRegular];
     if (open_settings) {
       open_settings();
     } else {
@@ -279,6 +284,13 @@ MacTray::MacTray(std::function<void()> show_window,
 
 MacTray::~MacTray() = default;
 
+void MacActivateWindow(void *appkit_view) {
+  NSView *view = (__bridge NSView *)appkit_view;
+  NSWindow *window = [view window];
+  [NSApp activateIgnoringOtherApps:YES];
+  [window makeKeyAndOrderFront:nil];
+}
+
 void MacTray::MinimizeToTray() { impl_->MinimizeToTray(); }
 
 void MacTray::RemoveTrayIcon() { impl_->RemoveTrayIcon(); }