fix: wrong focus after active app becomes windowless (closes #2065)

src/logic/events/AccessibilityEvents.swift

@@ -19,7 +19,7 @@ fileprivate func handleEvent(_ type: String, _ element: AXUIElement) throws {
             case kAXWindowCreatedNotification: try windowCreated(element, pid)
             case kAXMainWindowChangedNotification,
                  kAXFocusedWindowChangedNotification: try focusedWindowChanged(element, pid)
-            case kAXUIElementDestroyedNotification: try windowDestroyed(element)
+            case kAXUIElementDestroyedNotification: try windowDestroyed(element, pid)
             case kAXWindowMiniaturizedNotification,
                  kAXWindowDeminiaturizedNotification: try windowMiniaturizedOrDeminiaturized(element, type)
             case kAXTitleChangedNotification: try windowTitleChanged(element, pid)
@@ -130,13 +130,16 @@ fileprivate func focusedWindowChanged(_ element: AXUIElement, _ pid: pid_t) thro
     }
 }
 
-fileprivate func windowDestroyed(_ element: AXUIElement) throws {
+fileprivate func windowDestroyed(_ element: AXUIElement, _ pid: pid_t) throws {
     let wid = try element.cgWindowId()
     DispatchQueue.main.async {
         if let index = (Windows.list.firstIndex { $0.isEqualRobust(element, wid) }) {
             let window = Windows.list[index]
             Windows.removeAndUpdateFocus(window)
             let windowlessApp = window.application.addWindowslessAppsIfNeeded()
+            if windowlessApp != nil {
+                Applications.find(pid)?.focusedWindow = nil
+            }
             if Windows.list.count > 0 {
                 Windows.moveFocusedWindowIndexAfterWindowDestroyedInBackground(index)
                 App.app.refreshOpenUi(windowlessApp)