fix(@desktop/chat): Fix activity center icon badge displaying

Fix #5739

src/app/modules/main/activity_center/model.nim

@@ -184,6 +184,7 @@ QtObject:
 
     if (addToCount and not activityCenterNotification.read):
       self.nbUnreadNotifications = self.nbUnreadNotifications + 1
+      self.unreadCountChanged()
 
   proc updateUnreadCount*(self: Model, count: int) =
     self.nbUnreadNotifications = count

ui/app/AppLayouts/Chat/popups/ActivityCenterPopup.qml

@@ -28,6 +28,8 @@ Popup {
     property var chatSectionModule
     property var messageContextMenu
 
+    readonly property int unreadNotificationsCount : activityCenter.store.activityCenterList.unreadCount
+
     id: activityCenter
     modal: false
 

ui/app/AppLayouts/Chat/views/ChatContentView.qml

@@ -158,12 +158,7 @@ ColumnLayout {
         notificationButton.visible: localAccountSensitiveSettings.isActivityCenterEnabled
         notificationButton.tooltip.offset: localAccountSensitiveSettings.expandUsersList && membersButton.visible ? 0 : 14
 
-        notificationCount: {
-            if(!chatContentModule)
-                return 0
-
-            return chatContentModule.chatDetails.notificationCount
-        }
+        notificationCount: activityCenter.unreadNotificationsCount
 
         onSearchButtonClicked: root.openAppSearch()