feat: add activity center switch to show and hide the bell icon

ui/app/AppLayouts/Chat/ChatColumn/TopBar.qml

@@ -139,6 +139,7 @@ Item {
 
         Rectangle {
             id: separator
+            visible: activityCenterBtn.visible
             width: 1
             height: 24
             color: Style.current.separator
@@ -147,6 +148,7 @@ Item {
 
         StatusIconButton {
             id: activityCenterBtn
+            visible: appSettings.isActivityCenterEnabled
             icon.name: "bell"
             iconColor: Style.current.contextMenuButtonForegroundColor
             hoveredIconColor: Style.current.contextMenuButtonForegroundColor

ui/app/AppLayouts/Profile/Sections/AdvancedContainer.qml

@@ -109,6 +109,20 @@ Item {
             }
         }
 
+        StatusSettingsLineButton {
+            text: qsTr("Activity Center")
+            isSwitch: true
+            switchChecked: appSettings.isActivityCenterEnabled
+            onClicked: {
+                if (!appSettings.isActivityCenterEnabled) {
+                    confirmationPopup.settingsProp = "isActivityCenterEnabled"
+                    confirmationPopup.open()
+                } else {
+                    appSettings.isActivityCenterEnabled = false
+                }
+            }
+        }
+
         // StatusSettingsLineButton {
         //     //% "Node Management"
         //     text: qsTrId("node-management")

ui/app/AppMain.qml

@@ -112,6 +112,7 @@ RowLayout {
         property bool isWalletEnabled: false
         property bool nodeManagementEnabled: false
         property bool isBrowserEnabled: false
+        property bool isActivityCenterEnabled: false
         property bool displayChatImages: false
         property bool useCompactMode: true
         property bool timelineEnabled: true