gui: fix ghost process, null block.reaction crash, window counter

gui/ChatPane.qml

@@ -692,20 +692,20 @@ Item {
                     anchors.right: parent.right
                     anchors.margins: 4
                     z: 10
-                    text: block.reaction || ""
+                    text: block ? (block.reaction || "") : ""
                     font.pixelSize: 18
-                    visible: block.reaction !== ""
+                    visible: block ? block.reaction !== "" : false
                 }
 
                 // Reaction buttons (hover only, hidden when already reacted)
                 Row {
                     anchors.bottom: parent.bottom
                     anchors.right: parent.right
-                    anchors.rightMargin: block.reaction !== "" ? 36 : 4
+                    anchors.rightMargin: block && block.reaction !== "" ? 36 : 4
                     anchors.margins: 4
                     z: 10
                     spacing: 2
-                    opacity: (assistantHover.hovered && block.reaction === "") ? 0.9 : 0
+                    opacity: (assistantHover.hovered && (block ? block.reaction : "") === "") ? 0.9 : 0
                     Behavior on opacity { NumberAnimation { duration: 150 } }
 
                     Repeater {

gui/main-kf5.qml

@@ -11,6 +11,16 @@ ApplicationWindow {
     height: 600
     visible: true
 
+    Component.onCompleted: activator.windowOpened()
+
+    Component.onDestruction: {
+        activator.windowClosed()
+        if (activator.windowCount === 0
+                && !(theme.closeToTray && systemTrayAvailable)) {
+            Qt.quit()
+        }
+    }
+
     onClosing: {
         if (theme.closeToTray && systemTrayAvailable) {
             close.accepted = false

gui/main.cpp

@@ -27,12 +27,16 @@ public:
     explicit GuiActivator(QQmlApplicationEngine *engine, QObject *parent = nullptr)
         : QObject(parent)
         , m_engine(engine)
+        , m_windowCount(0)
     {
     }
 
     void setWindowUrl(const QUrl &url) { m_url = url; }
+    int windowCount() const { return m_windowCount; }
 
 public slots:
+    void windowOpened() { ++m_windowCount; }
+    void windowClosed() { if (m_windowCount > 0) --m_windowCount; }
     void Activate()
     {
         const auto roots = m_engine->rootObjects();
@@ -65,6 +69,7 @@ public slots:
 private:
     QQmlApplicationEngine *m_engine;
     QUrl m_url;
+    int m_windowCount;
 };
 
 static QIcon makeBrainIcon()

gui/main.qml

@@ -10,6 +10,8 @@ ApplicationWindow {
     height: 600
     visible: true
 
+    Component.onCompleted: activator.windowOpened()
+
     onClosing: function(close) {
         if (theme.closeToTray && systemTrayAvailable) {
             close.accepted = false
@@ -17,6 +19,12 @@ ApplicationWindow {
         }
     }
 
+    Component.onDestruction: {
+        if (typeof activator !== 'undefined' && activator) {
+            activator.windowClosed()
+        }
+    }
+
     color: palette.window
     font.family: theme.fontFamily || Qt.application.font.family
     font.pointSize: theme.fontSize > 0 ? theme.fontSize : Qt.application.font.pointSize
@@ -290,6 +298,13 @@ ApplicationWindow {
         visible: false
         color: palette.window
 
+        Component.onCompleted: activator.windowOpened()
+        Component.onDestruction: {
+            if (typeof activator !== 'undefined' && activator) {
+                activator.windowClosed()
+            }
+        }
+
         SessionGraph {
             id: graphView
             anchors.fill: parent