fixed update icon linux

client/platforms/linux/linuxtrayiconbackend.cpp

@@ -32,12 +32,15 @@ void LinuxTrayIconBackend::show()
 
 void LinuxTrayIconBackend::applyVisual(const TrayIconVisual &visual)
 {
-    const QIcon icon = buildTrayIcon(visual.connectionState, visual.darkTheme);
+    if (m_hasLastVisual && visual.connectionState == m_lastState && visual.darkTheme == m_lastDarkTheme) {
-
+        return;
-    // Some tray implementations cache the first icon; clear before applying an update.
-    if (m_trayIcon.isVisible()) {
-        m_trayIcon.setIcon(QIcon());
     }
+
+    m_lastState = visual.connectionState;
+    m_lastDarkTheme = visual.darkTheme;
+    m_hasLastVisual = true;
+
+    const QIcon icon = buildTrayIcon(visual.connectionState, visual.darkTheme);
     m_trayIcon.setIcon(icon);
 }
 

client/platforms/linux/linuxtrayiconbackend.h

@@ -5,6 +5,7 @@
 
 #include <QColor>
 #include <QIcon>
+#include <QString>
 #include <QSystemTrayIcon>
 
 class LinuxTrayIconBackend final : public TrayIconBackend
@@ -24,6 +25,9 @@ private:
     QIcon buildTrayIcon(Vpn::ConnectionState state, bool darkTheme) const;
 
     QSystemTrayIcon m_trayIcon;
+    Vpn::ConnectionState m_lastState = Vpn::ConnectionState::Unknown;
+    bool m_lastDarkTheme = false;
+    bool m_hasLastVisual = false;
 };
 
 #endif // LINUXTRAYICONBACKEND_H