fix update linux

client/platforms/linux/linuxtrayiconbackend.cpp

@@ -34,7 +34,13 @@ void LinuxTrayIconBackend::applyVisual(const TrayIconVisual &visual)
 {
     const qreal opacity = TrayIconCommon::opacityForState(visual.connectionState);
     const QColor indicatorColor = TrayIconCommon::indicatorColorForState(visual.connectionState);
-    m_trayIcon.setIcon(buildTrayIcon(opacity, visual.darkTheme, indicatorColor));
+    const QIcon icon = buildTrayIcon(opacity, visual.darkTheme, indicatorColor);
+
+    // Some tray implementations cache the first icon; clear before applying an update.
+    if (m_trayIcon.isVisible()) {
+        m_trayIcon.setIcon(QIcon());
+    }
+    m_trayIcon.setIcon(icon);
 }
 
 void LinuxTrayIconBackend::showMessage(const QString &title, const QString &message, const TrayIconVisual &visual,

client/platforms/linux/linuxtraytheme.cpp

@@ -1,7 +1,9 @@
 #include "linuxtraytheme.h"
 
 #include "platforms/linux/linuxutils.h"
+#include "ui/utils/trayThemeChangeFilter.h"
 
+#include <QApplication>
 #include <QGuiApplication>
 #include <QObject>
 #include <QStyleHints>
@@ -16,5 +18,7 @@ void LinuxTrayTheme::installThemeObserver(const std::function<void()> &onThemeCh
         QObject::connect(styleHints, &QStyleHints::colorSchemeChanged, parent, [onThemeChanged]() { onThemeChanged(); });
     }
 
+    qApp->installEventFilter(new TrayThemeChangeFilter(onThemeChanged, parent));
+
     LinuxUtils::installThemeChangeObserver(onThemeChanged);
 }

client/platforms/linux/linuxutils.cpp

@@ -51,6 +51,11 @@ public:
                     SLOT(onPortalSettingChanged(QString, QString, QDBusVariant)));
     }
 
+    void setCallback(std::function<void()> callback)
+    {
+        m_callback = std::move(callback);
+    }
+
 private slots:
     void onPortalSettingChanged(const QString &namespaceName, const QString &key, const QDBusVariant &value)
     {
@@ -114,7 +119,10 @@ void LinuxUtils::installThemeChangeObserver(std::function<void()> callback)
 
     if (!g_themeObserver) {
         g_themeObserver = new LinuxThemeObserver(std::move(callback), qApp);
+        return;
     }
+
+    g_themeObserver->setCallback(std::move(callback));
 }
 
 #include "linuxutils.moc"