From 50e8319d30ff66ae9ede45223bb3cc48b6ffb4cc Mon Sep 17 00:00:00 2001
From: Ariver <shanghai3168@gmail.com>
Date: Fri, 29 May 2026 13:32:41 +0800
Subject: [PATCH] Add 7.8.1 App Store release pack

---
 Apptag/ApptagApp.swift |  584 +++++++++++++++++++++++++++++++++++++---------------------
 1 files changed, 371 insertions(+), 213 deletions(-)

diff --git a/Apptag/ApptagApp.swift b/Apptag/ApptagApp.swift
index b78c05a..ccc3c80 100644
--- a/Apptag/ApptagApp.swift
+++ b/Apptag/ApptagApp.swift
@@ -6,7 +6,12 @@
 
 @main
 struct TagLauncherApp: App {
+    private static let singletonLockFile = TagLauncherProcessSingleton.acquireOrHandOffAndExit()
     @NSApplicationDelegateAdaptor(AppDelegate.self) var appDelegate
+
+    init() {
+        _ = Self.singletonLockFile
+    }
 
     var body: some Scene {
         Settings {
@@ -16,20 +21,12 @@
         .commands {
             CommandGroup(replacing: .systemServices) { }
             CommandGroup(replacing: .appVisibility) { }
+            CommandGroup(replacing: .help) { }
         }
     }
 }
 
 // MARK: - App Delegate (menubar + overlay window + hotkey)
-
-final class OverlayPanel: NSPanel {
-    override var canBecomeKey: Bool { true }
-    override var canBecomeMain: Bool { true }
-
-    override func constrainFrameRect(_ frameRect: NSRect, to screen: NSScreen?) -> NSRect {
-        frameRect
-    }
-}
 
 final class AppDelegate: NSObject, NSApplicationDelegate, NSMenuDelegate {
     private static let showDockIconKey = "showDockIcon"
@@ -37,13 +34,17 @@
     private static let statusItemButtonIdentifier = NSUserInterfaceItemIdentifier("TagLauncherStatusItemButton")
     private static let statusItemAccessibilityLabel = AppIdentity.displayName
     private static let showAppListMenuItemIdentifier = NSUserInterfaceItemIdentifier("TagLauncherShowAppListMenuItem")
+    private static let helpMenuItemIdentifier = NSUserInterfaceItemIdentifier("TagLauncherHelpMenu")
+    private static let downloadHelpMenuItemIdentifier = NSUserInterfaceItemIdentifier("TagLauncherDownloadHelpMenuItem")
+    private static let externalActivationNotification = Notification.Name("TagLauncherExternalActivationRequested")
+    private static let externalActivationObject = AppIdentity.bundleIdentifier
     private static let launcherOverlayLevel = NSWindow.Level(rawValue: NSWindow.Level.mainMenu.rawValue - 1)
     private static let overlayDefaultLevel = launcherOverlayLevel
     private static let overlayTextInputLevel = launcherOverlayLevel
 
     private var statusItem: NSStatusItem?
-    private var overlayWindow: NSWindow?
     private var overlayKeyMonitor: Any?
+    private var quickSearchLocalMouseMonitor: Any?
     private var quickSearchExternalMouseMonitor: Any?
     private var settingsWindow: NSWindow?    // Track Settings window to keep it above overlay
     private var mainHotkeyRef: EventHotKeyRef?
@@ -56,12 +57,85 @@
     private var isConfiguringApplicationMenu = false
     private var lastShowDockIcon: Bool?
     private var statusMenuScreenForNextOverlay: NSScreen?
-    private var overlayGeneration = 0
     private var suppressReopenUntil = Date.distantPast
 
-    private struct OverlayPlacementContext {
-        let screen: NSScreen
-        let frame: NSRect
+    private lazy var overlayController = OverlayWindowController(
+        dependencies: OverlayWindowController.Dependencies(
+            shouldStageAsAccessory: { [weak self] in
+                self?.shouldStageOverlayAsAccessory ?? false
+            },
+            isSettingsVisible: { [weak self] in
+                self?.isSettingsVisible ?? false
+            },
+            settingsWindow: { [weak self] in
+                self?.settingsWindow
+            },
+            canHideOverlay: { [weak self] in
+                self?.isInEditMode == false
+            },
+            currentOverlayLevel: { [weak self] in
+                self?.currentOverlayLevel ?? Self.overlayDefaultLevel
+            },
+            overlayLevel: { [weak self] initialQuickSearchSource in
+                self?.overlayLevel(initialQuickSearchSource: initialQuickSearchSource) ?? Self.overlayDefaultLevel
+            },
+            makeContentView: { [weak self] initialQuickSearchSource in
+                DismissibleHostingView(
+                    rootView: ContentView(
+                        hideOverlay: { [weak self] in
+                            self?.hideOverlay(force: true)
+                        },
+                        initialQuickSearchSource: initialQuickSearchSource
+                    ),
+                    onBackdropTap: { [weak self] in
+                        self?.hideOverlay()
+                    }
+                )
+            },
+            handleOverlayKeyEvent: { [weak self] event in
+                self?.handleOverlayKeyEvent(event) ?? false
+            },
+            installOverlayKeyMonitor: { [weak self] in
+                self?.installOverlayKeyMonitor()
+            },
+            removeOverlayKeyMonitor: { [weak self] in
+                self?.removeOverlayKeyMonitor()
+            },
+            removeQuickSearchMouseMonitor: { [weak self] in
+                self?.removeQuickSearchExternalMouseMonitor()
+            },
+            detachSettingsWindow: { [weak self] window in
+                self?.detachSettingsWindow(window)
+            },
+            prepareSettingsWindow: { [weak self] window in
+                self?.prepareSettingsWindow(window)
+            },
+            refreshChromeState: { [weak self] activate, avoidSpaceSwitch in
+                self?.refreshLauncherChromeState(activate: activate, avoidSpaceSwitch: avoidSpaceSwitch)
+            },
+            onWillHide: {
+                TagDatabase.flushPendingCategorySchemeBackupBatch()
+            },
+            onDidHide: {
+                NotificationCenter.default.post(name: .tagLauncherOverlayDidHide, object: nil)
+            },
+            onDidShow: {
+                NotificationCenter.default.post(name: .tagLauncherOverlayDidShow, object: nil)
+            }
+        )
+    )
+
+    private var overlayWindow: NSWindow? {
+        overlayController.window
+    }
+
+    private var overlayGeneration: Int {
+        overlayController.generation
+    }
+
+    private var overlayAvoidsSpaceSwitch: Bool {
+        get { overlayController.avoidsSpaceSwitch }
+        set { overlayController.avoidsSpaceSwitch = newValue }
     }
 
     private var isOverlayVisible: Bool {
@@ -74,6 +148,10 @@
 
     private var requiresForegroundOwnership: Bool {
         isOverlayVisible || isSettingsVisible
+    }
+
+    private var shouldStageOverlayAsAccessory: Bool {
+        !isSettingsVisible && !UserDefaults.standard.bool(forKey: Self.showDockIconKey)
     }
 
     private var currentOverlayLevel: NSWindow.Level {
@@ -112,6 +190,7 @@
         observeAppNoteEditing()
         observeQuickSearch()
         observePreferencesRequests()
+        observeExternalActivationRequests()
         observeApplicationMenuChanges()
         observeChromeSettings()
         observeLanguageChanges()
@@ -127,7 +206,7 @@
     /// Dock icon click → show overlay (same as menubar "Show TagLauncher")
     func applicationShouldHandleReopen(_ sender: NSApplication, hasVisibleWindows flag: Bool) -> Bool {
         guard Date() >= suppressReopenUntil else { return false }
-        showOverlay()
+        showOrFocusOverlay()
         return false  // Suppress default "unhide all windows" behavior
     }
 
@@ -138,6 +217,11 @@
         TagDatabase.flushPendingCategorySchemeBackupBatch()
         removeOverlayKeyMonitor()
         removeQuickSearchExternalMouseMonitor()
+        DistributedNotificationCenter.default().removeObserver(
+            self,
+            name: Self.externalActivationNotification,
+            object: Self.externalActivationObject
+        )
     }
 
     /// Ensure defaultGroupName is always the language-neutral key "Other".
@@ -240,13 +324,17 @@
         }
     }
 
-    private func refreshLauncherChromeState(activate: Bool = false) {
+    private func refreshLauncherChromeState(activate: Bool = false, avoidSpaceSwitch: Bool = false) {
         let showDock = UserDefaults.standard.bool(forKey: Self.showDockIconKey)
         lastShowDockIcon = showDock
 
-        let desiredPolicy: NSApplication.ActivationPolicy = requiresForegroundOwnership
+        let shouldStayAccessoryForCurrentFullscreenSpace = isOverlayVisible
+            && (avoidSpaceSwitch || overlayAvoidsSpaceSwitch)
+        let desiredPolicy: NSApplication.ActivationPolicy = shouldStayAccessoryForCurrentFullscreenSpace
+            ? .accessory
+            : (requiresForegroundOwnership
             ? .regular
-            : (showDock ? .regular : .accessory)
+            : (showDock ? .regular : .accessory))
         if NSApp.activationPolicy() != desiredPolicy {
             NSApp.setActivationPolicy(desiredPolicy)
         }
@@ -256,7 +344,7 @@
             NSApp.presentationOptions = desiredPresentation
         }
 
-        if activate && requiresForegroundOwnership {
+        if activate && requiresForegroundOwnership && !shouldStayAccessoryForCurrentFullscreenSpace {
             let keyWindow = isSettingsVisible ? settingsWindow : (isOverlayVisible ? overlayWindow : nil)
             claimLauncherForeground(
                 keyWindow: keyWindow,
@@ -267,13 +355,14 @@
     }
 
     private func handleApplicationDidResignActive() {
+        guard !isOverlayVisible else {
+            return
+        }
+
         if isQuickSearchOpen {
             NotificationCenter.default.post(name: .tagLauncherQuickSearchDismissRequested, object: nil)
         }
 
-        guard !isOverlayVisible else {
-            return
-        }
         if !requiresForegroundOwnership {
             refreshLauncherChromeState()
         }
@@ -306,7 +395,7 @@
         guard supportsLaunchAtLogin else { return }
         let plist: [String: Any] = [
             "Label": Self.launchAgentLabel,
-            "ProgramArguments": ["open", Bundle.main.bundlePath, "--hide"],
+            "ProgramArguments": Self.expectedLaunchAgentProgramArguments(),
             "RunAtLoad": true,
         ]
         let dir = Self.launchAgentURL.deletingLastPathComponent()
@@ -314,10 +403,16 @@
         (plist as NSDictionary).write(to: Self.launchAgentURL, atomically: true)
 
         let uid = getuid()
+        let bootoutTask = Process()
+        bootoutTask.launchPath = "/bin/launchctl"
+        bootoutTask.arguments = ["bootout", "gui/\(uid)/\(Self.launchAgentLabel)"]
+        try? bootoutTask.run()
+        bootoutTask.waitUntilExit()
+
         let task = Process()
         task.launchPath = "/bin/launchctl"
         task.arguments = ["bootstrap", "gui/\(uid)", Self.launchAgentURL.path]
-        task.launch()
+        try? task.run()
     }
 
     static func disableLaunchAtLogin() {
@@ -326,8 +421,23 @@
         let task = Process()
         task.launchPath = "/bin/launchctl"
         task.arguments = ["bootout", "gui/\(uid)/\(Self.launchAgentLabel)"]
-        task.launch()
+        try? task.run()
         try? FileManager.default.removeItem(at: Self.launchAgentURL)
+    }
+
+    private static func launchAgentProgramArguments() -> [String]? {
+        guard let plist = NSDictionary(contentsOf: Self.launchAgentURL) as? [String: Any] else {
+            return nil
+        }
+        return plist["ProgramArguments"] as? [String]
+    }
+
+    private static func expectedLaunchAgentProgramArguments() -> [String] {
+        let executablePath = Bundle.main.executablePath
+            ?? Bundle.main.bundleURL
+                .appendingPathComponent("Contents/MacOS/\(AppIdentity.displayName)")
+                .path
+        return [executablePath, "--hide"]
     }
 
     /// On first launch, enable login item by default via LaunchAgent.
@@ -340,7 +450,14 @@
             return
         }
         let key = "launchAtLogin"
-        if !AppDefaults.hasStoredValue(for: key) && UserDefaults.standard.bool(forKey: key) {
+        guard UserDefaults.standard.bool(forKey: key) else {
+            Self.disableLaunchAtLogin()
+            return
+        }
+
+        let expectedArguments = Self.expectedLaunchAgentProgramArguments()
+        if !AppDefaults.hasStoredValue(for: key)
+            || Self.launchAgentProgramArguments() != expectedArguments {
             Self.enableLaunchAtLogin()
         }
     }
@@ -427,7 +544,7 @@
     }
 
     func menuWillOpen(_ menu: NSMenu) {
-        statusMenuScreenForNextOverlay = screenContainingCurrentPointer()
+        statusMenuScreenForNextOverlay = overlayController.screenContainingCurrentPointer()
             ?? statusItem?.button?.window?.screen
             ?? NSScreen.main
             ?? NSScreen.screens.first
@@ -538,6 +655,7 @@
             }
 
             self.configureApplicationMenu()
+            self.configureHelpMenu()
             if retries > 0 && self.applicationMenuNeedsCleanup() {
                 self.configureApplicationMenuWhenAvailable(retries: retries - 1)
             }
@@ -656,6 +774,42 @@
         }
     }
 
+    private func configureHelpMenu() {
+        guard let mainMenu = NSApp.mainMenu else { return }
+        NSApp.helpMenu = nil
+
+        for item in mainMenu.items.reversed() {
+            let isHelpMenu = item.identifier == Self.helpMenuItemIdentifier
+                || item.title.localizedCaseInsensitiveContains("help")
+                || item.title == tr("menu.help")
+                || item.submenu?.title.localizedCaseInsensitiveContains("help") == true
+                || item.submenu?.title == tr("menu.help")
+            if isHelpMenu {
+                mainMenu.removeItem(item)
+            }
+        }
+
+        let menuItem = NSMenuItem(title: tr("menu.help"), action: nil, keyEquivalent: "")
+        let helpMenu = NSMenu(title: tr("menu.help"))
+        menuItem.identifier = Self.helpMenuItemIdentifier
+        menuItem.submenu = helpMenu
+
+        let downloadItem = NSMenuItem()
+        downloadItem.identifier = Self.downloadHelpMenuItemIdentifier
+        downloadItem.title = tr("help.downloadPDF")
+        downloadItem.action = #selector(openLocalizedHelp(_:))
+        downloadItem.target = self
+        downloadItem.keyEquivalent = ""
+        downloadItem.keyEquivalentModifierMask = []
+        downloadItem.isEnabled = true
+        helpMenu.addItem(downloadItem)
+        mainMenu.addItem(menuItem)
+    }
+
+    @objc private func openLocalizedHelp(_ sender: Any? = nil) {
+        NSWorkspace.shared.open(HelpDocument.currentURL)
+    }
+
     private func removeMenuBarItem() {
         guard let statusItem else { return }
         NSStatusBar.system.removeStatusItem(statusItem)
@@ -677,11 +831,11 @@
     }
 
     private func performToggleOverlay(preferredScreen: NSScreen?) {
-        if overlayWindow?.isVisible == true {
-            hideOverlay(force: true)
-        } else {
-            showOverlay(preferredScreen: preferredScreen)
-        }
+        overlayController.toggle(preferredScreen: preferredScreen)
+    }
+
+    private func showOrFocusOverlay(preferredScreen: NSScreen? = nil) {
+        overlayController.showOrFocus(preferredScreen: preferredScreen)
     }
 
     private func showOverlay(
@@ -689,103 +843,75 @@
         preferredScreen: NSScreen? = nil,
         stagedForAllSpaces: Bool = false
     ) {
-        guard let placement = overlayPlacementContextForNextOverlay(preferredScreen: preferredScreen) else { return }
-
-        if !stagedForAllSpaces && !isSettingsVisible && NSApp.isActive {
-            // Let the all-spaces panel attach to the pointer's display before the app reclaims focus.
-            if NSApp.activationPolicy() != .accessory {
-                NSApp.setActivationPolicy(.accessory)
-            }
-            NSApp.deactivate()
-            DispatchQueue.main.asyncAfter(deadline: .now() + 0.08) { [weak self] in
-                self?.showOverlay(
-                    initialQuickSearchSource: initialQuickSearchSource,
-                    preferredScreen: placement.screen,
-                    stagedForAllSpaces: true
-                )
-            }
-            return
-        }
-
-        if overlayWindow?.isVisible == true {
-            hideOverlay(force: true)
-        } else if let existingWindow = overlayWindow {
-            existingWindow.orderOut(nil)
-            overlayWindow = nil
-        }
-
-        let window = makeOverlayWindow(
-            on: placement.screen,
-            initialQuickSearchSource: initialQuickSearchSource
+        overlayController.show(
+            initialQuickSearchSource: initialQuickSearchSource,
+            preferredScreen: preferredScreen,
+            stagedForAllSpaces: stagedForAllSpaces
         )
-        overlayGeneration &+= 1
-        overlayWindow = window
-        installOverlayKeyMonitor()
-        if !isSettingsVisible {
-            if NSApp.isActive {
-                NSApp.deactivate()
-            }
-            if NSApp.activationPolicy() != .accessory {
-                NSApp.setActivationPolicy(.accessory)
-            }
-        }
-
-        let targetLevel = overlayLevel(initialQuickSearchSource: initialQuickSearchSource)
-        window.setFrame(placement.frame, display: true)
-        window.level = targetLevel
-
-        window.makeKeyAndOrderFront(nil)
-        window.orderFrontRegardless()
-
-        let placementFrame = placement.frame
-        let finishForegroundClaim: () -> Void = { [weak self, weak window] in
-            guard let self, let window, self.overlayWindow === window else { return }
-            self.refreshLauncherChromeState(activate: true)
-            if window.frame != placementFrame {
-                window.setFrame(placementFrame, display: true)
-                window.makeKeyAndOrderFront(nil)
-                window.orderFrontRegardless()
-            }
-            if let settingsWindow = self.settingsWindow, settingsWindow.isVisible {
-                self.prepareSettingsWindow(settingsWindow)
-            }
-            NotificationCenter.default.post(name: .tagLauncherOverlayDidShow, object: nil)
-        }
-
-        if !isSettingsVisible && stagedForAllSpaces {
-            DispatchQueue.main.asyncAfter(deadline: .now() + 0.12, execute: finishForegroundClaim)
-        } else {
-            finishForegroundClaim()
-        }
     }
 
     private func installOverlayKeyMonitor() {
         guard overlayKeyMonitor == nil else { return }
         overlayKeyMonitor = NSEvent.addLocalMonitorForEvents(matching: .keyDown) { [weak self] event in
             guard let self else { return event }
-            guard self.shouldHandleOverlayKeyEvent(event) else { return event }
-            if event.keyCode == 53 { // Escape
-                if self.isQuickSearchOpen {
-                    NotificationCenter.default.post(name: .tagLauncherQuickSearchDismissRequested, object: nil)
-                    return nil
-                }
-                self.hideOverlay(force: true)
-                return nil
-            }
-            if self.shouldOpenQuickSearch(for: event) {
-                NotificationCenter.default.post(
-                    name: .tagLauncherQuickSearchRequested,
-                    object: nil,
-                    userInfo: ["source": QuickSearchOpenSource.mainOverlay]
-                )
+            if self.handleOverlayKeyEvent(event) {
                 return nil
             }
             return event
         }
     }
 
+    @discardableResult
+    private func handleOverlayKeyEvent(_ event: NSEvent) -> Bool {
+        guard event.type == .keyDown,
+              shouldHandleOverlayKeyEvent(event)
+        else { return false }
+
+        if event.keyCode == UInt16(kVK_Escape) {
+            return handleOverlayEscapeKey()
+        }
+        if shouldOpenQuickSearch(for: event) {
+            requestQuickSearch(source: QuickSearchOpenSource.mainOverlay)
+            return true
+        }
+        return false
+    }
+
+    private func handleOverlayEscapeKey() -> Bool {
+        if isQuickSearchOpen {
+            isQuickSearchOpen = false
+            removeQuickSearchExternalMouseMonitor()
+            updateOverlayLevelForTextInput()
+            NotificationCenter.default.post(name: .tagLauncherQuickSearchDismissRequested, object: nil)
+            return true
+        }
+        guard !isSettingsVisible,
+              !isEditingAppNote,
+              !isModalInteractionActive
+        else { return false }
+        hideOverlay(force: true)
+        return true
+    }
+
+    private func requestQuickSearch(source: String) {
+        isQuickSearchOpen = true
+        promoteOverlayToForegroundInput()
+        updateOverlayLevelForTextInput()
+        installQuickSearchExternalMouseMonitor()
+        DispatchQueue.main.async {
+            NotificationCenter.default.post(
+                name: .tagLauncherQuickSearchRequested,
+                object: nil,
+                userInfo: ["source": source]
+            )
+        }
+    }
+
     private func shouldHandleOverlayKeyEvent(_ event: NSEvent) -> Bool {
         guard overlayWindow?.isVisible == true else { return false }
+        if !isSettingsVisible && NSApp.isActive {
+            return true
+        }
         if event.window == overlayWindow { return true }
         return event.window == nil && NSApp.keyWindow == overlayWindow
     }
@@ -801,26 +927,7 @@
               !isModalInteractionActive
         else { return false }
 
-        guard let firstResponder = overlayWindow?.firstResponder else { return true }
-        if firstResponder is NSText || firstResponder is NSTextField {
-            return false
-        }
-        if let responderView = firstResponder as? NSView,
-           viewOrAncestorHandlesSpace(responderView) {
-            return false
-        }
         return true
-    }
-
-    private func viewOrAncestorHandlesSpace(_ view: NSView) -> Bool {
-        var current: NSView? = view
-        while let candidate = current {
-            if candidate is NSButton || candidate is NSSegmentedControl || candidate is NSSlider {
-                return true
-            }
-            current = candidate.superview
-        }
-        return false
     }
 
     private func removeOverlayKeyMonitor() {
@@ -830,58 +937,8 @@
         }
     }
 
-    private func makeOverlayWindow(on screen: NSScreen, initialQuickSearchSource: String? = nil) -> NSWindow {
-        let panel = OverlayPanel(
-            contentRect: screen.frame,
-            styleMask: [.borderless, .fullSizeContentView, .nonactivatingPanel],
-            backing: .buffered,
-            defer: false
-        )
-        panel.isFloatingPanel = true
-        panel.hidesOnDeactivate = false
-        // This combination keeps the overlay on the pointer display, including fullscreen Spaces.
-        panel.collectionBehavior = [
-            .canJoinAllSpaces,
-            .fullScreenAuxiliary,
-            .stationary,
-            .transient,
-            .ignoresCycle
-        ]
-        panel.isOpaque = false
-        panel.backgroundColor = NSColor.black.withAlphaComponent(0.001)
-        panel.hasShadow = false
-        panel.titlebarAppearsTransparent = true
-        panel.titleVisibility = .hidden
-        panel.isReleasedWhenClosed = false
-        panel.contentView = DismissibleHostingView(
-            rootView: ContentView(
-                hideOverlay: { [weak self] in
-                    self?.hideOverlay(force: true)
-                },
-                initialQuickSearchSource: initialQuickSearchSource
-            ),
-            onBackdropTap: { [weak self] in
-                self?.hideOverlay()
-            }
-        )
-        return panel
-    }
-
     private func hideOverlay(force: Bool = false, discardWindow: Bool = false) {
-        guard force || !isInEditMode else { return }
-        overlayGeneration &+= 1
-        TagDatabase.flushPendingCategorySchemeBackupBatch()
-        if let settingsWindow, settingsWindow.parent == overlayWindow {
-            detachSettingsWindow(settingsWindow)
-        }
-        overlayWindow?.orderOut(nil)
-        removeOverlayKeyMonitor()
-        removeQuickSearchExternalMouseMonitor()
-        refreshLauncherChromeState()
-        NotificationCenter.default.post(name: .tagLauncherOverlayDidHide, object: nil)
-        if discardWindow {
-            overlayWindow = nil
-        }
+        overlayController.hide(force: force, discardWindow: discardWindow)
     }
 
     // MARK: - Global Hotkeys
@@ -982,13 +1039,11 @@
 
     private func showQuickSearchFromGlobalHotkey() {
         if overlayWindow?.isVisible == true {
-            guard !isSettingsVisible else { return }
-            refreshLauncherChromeState(activate: true)
-            NotificationCenter.default.post(
-                name: .tagLauncherQuickSearchRequested,
-                object: nil,
-                userInfo: ["source": QuickSearchOpenSource.globalVisible]
+            refreshLauncherChromeState(
+                activate: !overlayAvoidsSpaceSwitch,
+                avoidSpaceSwitch: overlayAvoidsSpaceSwitch
             )
+            requestQuickSearch(source: QuickSearchOpenSource.globalVisible)
             return
         }
         showOverlay(initialQuickSearchSource: QuickSearchOpenSource.globalHidden)
@@ -1035,6 +1090,19 @@
                 return
             }
 
+            if self.isMenuTrackingWindow(keyWindow) {
+                return
+            }
+
+            if self.isAppOwnedDocumentWindow(keyWindow) {
+                self.prepareSettingsWindow(keyWindow)
+                return
+            }
+
+            if NSApp.windows.contains(keyWindow) {
+                return
+            }
+
             // Settings/Preferences window -> float it above overlay for real-time preview.
             if self.isSettingsWindowCandidate(keyWindow) {
                 self.prepareSettingsWindow(keyWindow)
@@ -1047,6 +1115,7 @@
 
     /// Settings must always appear centered over the current overlay view and float above it.
     private func prepareSettingsWindow(_ window: NSWindow) {
+        dismissQuickSearchIfNeeded()
         let settingsSize = NSSize(width: 880, height: 460)
         window.identifier = NSUserInterfaceItemIdentifier("TagLauncherPreferencesWindow")
         window.minSize = settingsSize
@@ -1070,12 +1139,20 @@
 
         var behavior = window.collectionBehavior
         behavior.remove(.canJoinAllSpaces)
-        behavior.formUnion([.fullScreenAuxiliary, .moveToActiveSpace])
+        if overlayAvoidsSpaceSwitch {
+            behavior.remove(.moveToActiveSpace)
+            behavior.formUnion([.fullScreenAuxiliary, .stationary, .transient, .ignoresCycle])
+        } else {
+            behavior.formUnion([.fullScreenAuxiliary, .moveToActiveSpace])
+        }
         window.collectionBehavior = behavior
         window.makeKeyAndOrderFront(nil)
         window.orderFrontRegardless()
         settingsWindow = window
-        refreshLauncherChromeState(activate: true)
+        refreshLauncherChromeState(
+            activate: !overlayAvoidsSpaceSwitch,
+            avoidSpaceSwitch: overlayAvoidsSpaceSwitch
+        )
     }
 
     private func attachSettingsWindow(_ window: NSWindow, to overlayWindow: NSWindow) {
@@ -1092,12 +1169,47 @@
     private func isSettingsWindowCandidate(_ window: NSWindow) -> Bool {
         if window == settingsWindow { return true }
         if window.identifier?.rawValue == "TagLauncherPreferencesWindow" { return true }
+        if isAppOwnedDocumentWindow(window) { return true }
         guard NSApp.windows.contains(window),
               window != overlayWindow,
               window.isVisible,
               !(window is NSPanel)
         else { return false }
-        return true
+        return settingsWindowTitleCandidates().contains(normalizedWindowTitle(window.title))
+    }
+
+    private func isAppOwnedDocumentWindow(_ window: NSWindow) -> Bool {
+        NSApp.windows.contains(window)
+            && window != overlayWindow
+            && window.isVisible
+            && !(window is NSPanel)
+            && !isMenuTrackingWindow(window)
+            && window.styleMask.contains(.titled)
+    }
+
+    private func isMenuTrackingWindow(_ window: NSWindow) -> Bool {
+        let className = NSStringFromClass(type(of: window))
+        return className.localizedCaseInsensitiveContains("Menu")
+            || className.localizedCaseInsensitiveContains("Popup")
+    }
+
+    private func settingsWindowTitleCandidates() -> Set<String> {
+        let keys = [
+            "menu.preferences",
+            "settings.language",
+            "settings.general",
+            "quickSearch.hotkeys",
+            "settings.tags",
+            "settings.data",
+            "settings.about"
+        ]
+        return Set(keys.map { normalizedWindowTitle(tr($0)) })
+    }
+
+    private func normalizedWindowTitle(_ title: String) -> String {
+        title
+            .replacingOccurrences(of: "…", with: "")
+            .trimmingCharacters(in: .whitespacesAndNewlines)
     }
 
     private func isSettingsOwnedPanel(_ window: NSWindow) -> Bool {
@@ -1119,24 +1231,7 @@
     }
 
     private func screenUnderMouse() -> NSScreen? {
-        overlayPlacementContextForNextOverlay(preferredScreen: nil)?.screen
-    }
-
-    private func overlayPlacementContextForNextOverlay(preferredScreen: NSScreen?) -> OverlayPlacementContext? {
-        if let screen = preferredScreen {
-            return OverlayPlacementContext(screen: screen, frame: screen.frame)
-        }
-        guard let screen = screenContainingCurrentPointer() ?? NSScreen.main ?? NSScreen.screens.first else {
-            return nil
-        }
-        return OverlayPlacementContext(screen: screen, frame: screen.frame)
-    }
-
-    private func screenContainingCurrentPointer() -> NSScreen? {
-        let mousePoint = NSEvent.mouseLocation
-        return NSScreen.screens.first(where: {
-            NSMouseInRect(mousePoint, $0.frame, false)
-        })
+        overlayController.screenUnderMouse()
     }
 
     /// Clean up settingsWindow reference when the Settings window closes.
@@ -1150,9 +1245,18 @@
                   let closingWindow = notification.object as? NSWindow,
                   closingWindow == self.settingsWindow
             else { return }
+            let shouldRefocusOverlay = self.isOverlayVisible
+            let preferredScreen = self.overlayWindow?.screen
             self.detachSettingsWindow(closingWindow)
             self.settingsWindow = nil
-            self.refreshLauncherChromeState()
+            self.refreshLauncherChromeState(
+                activate: shouldRefocusOverlay && !self.overlayAvoidsSpaceSwitch,
+                avoidSpaceSwitch: self.overlayAvoidsSpaceSwitch
+            )
+            guard shouldRefocusOverlay else { return }
+            DispatchQueue.main.asyncAfter(deadline: .now() + 0.12) { [weak self] in
+                self?.showOrFocusOverlay(preferredScreen: preferredScreen)
+            }
         }
     }
 
@@ -1184,6 +1288,13 @@
     }
 
     private func promoteOverlayToForegroundInput() {
+        if overlayAvoidsSpaceSwitch {
+            refreshLauncherChromeState(activate: false, avoidSpaceSwitch: true)
+            guard let overlayWindow else { return }
+            overlayWindow.makeKeyAndOrderFront(nil)
+            overlayWindow.orderFrontRegardless()
+            return
+        }
         beginLauncherForegroundOwnership()
         guard let overlayWindow else { return }
         overlayWindow.makeKeyAndOrderFront(nil)
@@ -1227,6 +1338,7 @@
     }
 
     private func installQuickSearchExternalMouseMonitor() {
+        installQuickSearchLocalMouseMonitor()
         guard quickSearchExternalMouseMonitor == nil else { return }
         quickSearchExternalMouseMonitor = NSEvent.addGlobalMonitorForEvents(
             matching: [.leftMouseDown, .rightMouseDown, .otherMouseDown]
@@ -1238,7 +1350,25 @@
         }
     }
 
+    private func installQuickSearchLocalMouseMonitor() {
+        guard quickSearchLocalMouseMonitor == nil else { return }
+        quickSearchLocalMouseMonitor = NSEvent.addLocalMonitorForEvents(
+            matching: [.leftMouseDown, .rightMouseDown, .otherMouseDown]
+        ) { [weak self] event in
+            guard let self, self.isQuickSearchOpen else { return event }
+            if event.window === self.overlayWindow {
+                NotificationCenter.default.post(name: .tagLauncherQuickSearchDismissRequested, object: nil)
+                return nil
+            }
+            return event
+        }
+    }
+
     private func removeQuickSearchExternalMouseMonitor() {
+        if let quickSearchLocalMouseMonitor {
+            NSEvent.removeMonitor(quickSearchLocalMouseMonitor)
+            self.quickSearchLocalMouseMonitor = nil
+        }
         if let quickSearchExternalMouseMonitor {
             NSEvent.removeMonitor(quickSearchExternalMouseMonitor)
             self.quickSearchExternalMouseMonitor = nil
@@ -1264,9 +1394,29 @@
         }
     }
 
+    private func observeExternalActivationRequests() {
+        DistributedNotificationCenter.default().addObserver(
+            self,
+            selector: #selector(handleExternalActivationRequest(_:)),
+            name: Self.externalActivationNotification,
+            object: Self.externalActivationObject
+        )
+    }
+
+    @objc private func handleExternalActivationRequest(_ notification: Notification) {
+        let shouldShowOverlay = notification.userInfo?["showOverlay"] as? Bool ?? true
+        guard shouldShowOverlay else { return }
+        showOrFocusOverlay()
+    }
+
     @objc private func openPreferences(_ sender: Any? = nil) {
+        dismissQuickSearchIfNeeded()
         TagDatabase.flushPendingCategorySchemeBackupBatch()
-        beginLauncherForegroundOwnership()
+        if overlayAvoidsSpaceSwitch {
+            refreshLauncherChromeState(activate: false, avoidSpaceSwitch: true)
+        } else {
+            beginLauncherForegroundOwnership()
+        }
         // Don't hide overlay — keep it visible for real-time setting preview.
         if let overlayWindow, overlayWindow.isVisible {
             overlayWindow.makeKeyAndOrderFront(nil)
@@ -1292,6 +1442,14 @@
         prepareSettingsWindow(window)
     }
 
+    private func dismissQuickSearchIfNeeded() {
+        guard isQuickSearchOpen else { return }
+        isQuickSearchOpen = false
+        removeQuickSearchExternalMouseMonitor()
+        updateOverlayLevelForTextInput()
+        NotificationCenter.default.post(name: .tagLauncherQuickSearchDismissRequested, object: nil)
+    }
+
     @objc private func switchLanguage(_ sender: NSMenuItem) {
         guard let code = sender.representedObject as? String else { return }
         L10n.switchTo(code)

--
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