Ariver
2026-05-18 440d4dc270ac33348f2aeed7fbafddfe284acabe
Apptag/ApptagApp.swift
@@ -31,6 +31,8 @@
    private static let showDockIconKey = "showDockIcon"
    private static let showAppListMenuItemIdentifier = NSUserInterfaceItemIdentifier("TagLauncherShowAppListMenuItem")
    private static let showAppListShortcutGlyphs = "⌥⇧␣"
    private static let overlayDefaultLevel = NSWindow.Level(rawValue: Int(CGWindowLevelForKey(.maximumWindow)))
    private static let overlayTextInputLevel = NSWindow.Level.modalPanel
    private var statusItem: NSStatusItem?
    private var overlayWindow: NSWindow?
@@ -38,6 +40,7 @@
    private var settingsWindow: NSWindow?    // Track Settings window to keep it above overlay
    private var hotkeyRef: EventHotKeyRef?
    private var isInEditMode = false  // Suppress auto-dismiss during editing
    private var isEditingAppNote = false
    private var isConfiguringApplicationMenu = false
    private var lastShowDockIcon: Bool?
@@ -45,7 +48,12 @@
        (NSApp.delegate as? AppDelegate)?.syncChromeSettings(force: true)
    }
    static func openPreferencesWindow() {
        (NSApp.delegate as? AppDelegate)?.openPreferences()
    }
    func applicationDidFinishLaunching(_ notification: Notification) {
        AppDefaults.register()
        L10n.setup()
        migrateDefaultGroupName()
        TagDatabase.seedDefaultTags()
@@ -54,6 +62,8 @@
        observeOtherWindows()
        observeSettingsClose()
        observeEditMode()
        observeAppNoteEditing()
        observePreferencesRequests()
        observeApplicationMenuChanges()
        observeChromeSettings()
        observeLanguageChanges()
@@ -65,6 +75,10 @@
    func applicationShouldHandleReopen(_ sender: NSApplication, hasVisibleWindows flag: Bool) -> Bool {
        showOverlay()
        return false  // Suppress default "unhide all windows" behavior
    }
    func applicationWillTerminate(_ notification: Notification) {
        TagDatabase.flushPendingCategorySchemeBackupBatch()
    }
    /// Ensure defaultGroupName is always the language-neutral key "Other".
@@ -170,8 +184,7 @@
            return
        }
        let key = "launchAtLogin"
        if UserDefaults.standard.object(forKey: key) == nil {
            UserDefaults.standard.set(true, forKey: key)
        if !AppDefaults.hasStoredValue(for: key) && UserDefaults.standard.bool(forKey: key) {
            Self.enableLaunchAtLogin()
        }
    }
@@ -220,6 +233,7 @@
            action: #selector(openPreferences),
            keyEquivalent: ","
        )
        prefsItem.target = self
        prefsItem.keyEquivalentModifierMask = .command
        menu.addItem(prefsItem)
        menu.addItem(.separator())
@@ -249,23 +263,59 @@
    }
    private func makeMenuBarIcon() -> NSImage {
        let image = NSImage(size: NSSize(width: 18, height: 18))
        let menuBarIconSize = NSSize(width: 19, height: 19)
        if let url = Bundle.main.url(forResource: "TagLauncherMenuBarIcon", withExtension: "svg"),
           let image = NSImage(contentsOf: url) {
            image.size = menuBarIconSize
            image.isTemplate = true
            image.accessibilityDescription = "TagLauncher"
            return image
        }
        let image = NSImage(size: menuBarIconSize)
        image.lockFocus()
        defer { image.unlockFocus() }
        NSColor.black.setFill()
        NSGraphicsContext.current?.shouldAntialias = true
        NSColor.black.withAlphaComponent(0.88).setStroke()
        NSColor.black.withAlphaComponent(0.88).setFill()
        let tagBody = NSBezierPath()
        tagBody.move(to: NSPoint(x: 5.0, y: 2.2))
        tagBody.line(to: NSPoint(x: 15.6, y: 5.0))
        tagBody.line(to: NSPoint(x: 12.8, y: 15.8))
        tagBody.line(to: NSPoint(x: 2.2, y: 13.0))
        tagBody.close()
        tagBody.fill()
        let scale = image.size.width / 220.0
        func rectFromSVG(x: CGFloat, y: CGFloat, width: CGFloat, height: CGFloat) -> NSRect {
            NSRect(
                x: x * scale,
                y: (220.0 - y - height) * scale,
                width: width * scale,
                height: height * scale
            )
        }
        NSGraphicsContext.current?.compositingOperation = .clear
        NSBezierPath(ovalIn: NSRect(x: 10.9, y: 11.2, width: 3.2, height: 3.2)).fill()
        NSGraphicsContext.current?.compositingOperation = .sourceOver
        let outline = NSBezierPath(
            roundedRect: rectFromSVG(x: 15, y: 15, width: 190, height: 190),
            xRadius: 44 * scale,
            yRadius: 44 * scale
        )
        outline.lineWidth = 11 * scale
        outline.stroke()
        for rect in [
            rectFromSVG(x: 49, y: 134, width: 27, height: 27),
            rectFromSVG(x: 92, y: 134, width: 27, height: 27),
            rectFromSVG(x: 49, y: 91, width: 27, height: 27),
            rectFromSVG(x: 92, y: 91, width: 27, height: 27),
            rectFromSVG(x: 49, y: 48, width: 27, height: 27),
            rectFromSVG(x: 92, y: 48, width: 27, height: 27)
        ] {
            NSBezierPath(roundedRect: rect, xRadius: 8 * scale, yRadius: 8 * scale).fill()
        }
        for rect in [
            rectFromSVG(x: 132, y: 133, width: 47, height: 28),
            rectFromSVG(x: 132, y: 90.5, width: 47, height: 28),
            rectFromSVG(x: 132, y: 48, width: 47, height: 28)
        ] {
            NSBezierPath(roundedRect: rect, xRadius: 12 * scale, yRadius: 12 * scale).fill()
        }
        image.isTemplate = true
        image.accessibilityDescription = "TagLauncher"
@@ -322,6 +372,7 @@
        defer { isConfiguringApplicationMenu = false }
        removeUnusedDefaultItems(from: appMenu)
        configurePreferencesMenuItem(in: appMenu)
        upsertShowAppListItem(in: appMenu)
        normalizeSeparators(in: appMenu)
    }
@@ -378,6 +429,27 @@
        item.isEnabled = true
    }
    private func configurePreferencesMenuItem(in menu: NSMenu) {
        let item: NSMenuItem
        if let existingItem = menu.items.first(where: { isSettingsMenuItem($0) }) {
            item = existingItem
        } else {
            item = NSMenuItem()
            if let firstSeparatorIndex = menu.items.firstIndex(where: { $0.isSeparatorItem }) {
                menu.insertItem(item, at: firstSeparatorIndex)
            } else {
                menu.addItem(item)
            }
        }
        item.title = tr("menu.preferences")
        item.action = #selector(openPreferences)
        item.target = self
        item.keyEquivalent = ","
        item.keyEquivalentModifierMask = .command
        item.isEnabled = true
    }
    private func isSettingsMenuItem(_ item: NSMenuItem) -> Bool {
        item.action == Selector(("showSettingsWindow:"))
            || item.action == #selector(openPreferences)
@@ -430,7 +502,7 @@
        overlayWindow?.orderOut(nil)
        overlayWindow = makeOverlayWindow(on: screen)
        overlayWindow?.setFrame(screen.frame, display: true)
        overlayWindow?.level = NSWindow.Level(rawValue: Int(CGWindowLevelForKey(.maximumWindow)))
        overlayWindow?.level = isEditingAppNote ? Self.overlayTextInputLevel : Self.overlayDefaultLevel
        installOverlayKeyMonitor()
@@ -491,6 +563,7 @@
    private func hideOverlay(force: Bool = false) {
        guard force || !isInEditMode else { return }
        TagDatabase.flushPendingCategorySchemeBackupBatch()
        if let settingsWindow, settingsWindow.parent == overlayWindow {
            detachSettingsWindow(settingsWindow)
        }
@@ -676,27 +749,64 @@
        }
    }
    /// Lower the overlay while editing app notes so IME candidate windows are not hidden behind it.
    private func observeAppNoteEditing() {
        NotificationCenter.default.addObserver(
            forName: .tagLauncherAppNoteEditingChanged,
            object: nil,
            queue: .main
        ) { [weak self] notification in
            guard let self else { return }
            self.isEditingAppNote = (notification.userInfo?["active"] as? Bool) ?? false
            self.updateOverlayLevelForTextInput()
        }
    }
    private func updateOverlayLevelForTextInput() {
        guard let overlayWindow else { return }
        overlayWindow.level = isEditingAppNote ? Self.overlayTextInputLevel : Self.overlayDefaultLevel
        if let settingsWindow, settingsWindow.parent == overlayWindow {
            settingsWindow.level = overlayWindow.level
        }
    }
    /// The overlay buttons live inside SwiftUI; use an app-level notification like edit mode does.
    private func observePreferencesRequests() {
        NotificationCenter.default.addObserver(
            forName: .tagLauncherOpenPreferencesRequested,
            object: nil,
            queue: .main
        ) { [weak self] _ in
            self?.openPreferences()
        }
    }
    @objc private func openPreferences() {
        TagDatabase.flushPendingCategorySchemeBackupBatch()
        // Don't hide overlay — keep it visible for real-time setting preview.
        if let overlayWindow, overlayWindow.isVisible {
            overlayWindow.makeKeyAndOrderFront(nil)
            overlayWindow.orderFrontRegardless()
        }
        NSApp.sendAction(Selector(("showSettingsWindow:")), to: nil, from: nil)
        prepareSettingsWindowWhenAvailable(retries: 10)
    }
        NSApp.activate(ignoringOtherApps: true)
    private func prepareSettingsWindowWhenAvailable(retries: Int) {
        DispatchQueue.main.asyncAfter(deadline: .now() + 0.03) { [weak self] in
            guard let self else { return }
            let candidates = NSApp.windows.filter { window in
                self.isSettingsWindowCandidate(window)
            }
            candidates.forEach { self.prepareSettingsWindow($0) }
            if candidates.isEmpty && retries > 0 {
                self.prepareSettingsWindowWhenAvailable(retries: retries - 1)
            }
        if let settingsWindow {
            prepareSettingsWindow(settingsWindow)
            return
        }
        let settingsSize = NSSize(width: 880, height: 460)
        let window = NSWindow(
            contentRect: NSRect(origin: .zero, size: settingsSize),
            styleMask: [.titled, .closable],
            backing: .buffered,
            defer: false
        )
        window.title = tr("menu.preferences").replacingOccurrences(of: "…", with: "")
        window.contentView = NSHostingView(rootView: PreferencesView())
        window.isReleasedWhenClosed = false
        settingsWindow = window
        prepareSettingsWindow(window)
    }
    @objc private func switchLanguage(_ sender: NSMenuItem) {
@@ -733,6 +843,10 @@
            onBackdropTap()
            return
        }
        if let floatingButton = findFloatingIconButton(at: event.locationInWindow, in: self) {
            floatingButton.mouseDown(with: event)
            return
        }
        // Recursively search hit subtree for TextFieldContainer or NSTextField.
        // NSHostingView.hitTest may return a SwiftUI-internal wrapper — the
        // actual AppKit subview may be nested deeper.
@@ -743,11 +857,6 @@
        if let tf = findNSTextField(in: hit) {
            tf.window?.makeFirstResponder(tf)
            tf.mouseDown(with: event)
            return
        }
        // Forward to any other NSControl we find
        if let control = findNSControl(in: hit) {
            control.mouseDown(with: event)
            return
        }
        super.mouseDown(with: event)
@@ -769,562 +878,18 @@
        return nil
    }
    private func findNSControl(in view: NSView) -> NSControl? {
        if let control = view as? NSControl { return control }
        for sub in view.subviews {
            if let found = findNSControl(in: sub) { return found }
    private func findFloatingIconButton(at windowPoint: NSPoint, in view: NSView) -> FloatingIconButtonView? {
        for subview in view.subviews.reversed() where !subview.isHidden {
            if let found = findFloatingIconButton(at: windowPoint, in: subview) {
                return found
            }
        }
        guard let floatingButton = view as? FloatingIconButtonView else { return nil }
        let localPoint = floatingButton.convert(windowPoint, from: nil)
        if floatingButton.bounds.contains(localPoint) {
            return floatingButton
        }
        return nil
    }
}
// MARK: - Preferences View
struct PreferencesView: View {
    private let settingsWindowWidth: CGFloat = 880
    private let settingsContentWidth: CGFloat = 820
    private let generalContentWidth: CGFloat = 720
    private let generalLabelWidth: CGFloat = 190
    private let generalControlWidth: CGFloat = 500
    private let compactPickerWidth: CGFloat = 320
    @AppStorage("tagFontSize") private var tagFontSize: Double = 18
    @AppStorage("iconSize") private var iconSize: Double = 56
    @AppStorage("tagPosition") private var tagPosition = "left"
    @AppStorage("defaultGroupName") private var defaultGroupName = "Other"
    @AppStorage("displayMode") private var displayMode = "flat"
    @AppStorage("hideAppNames") private var hideAppNames = false
    @AppStorage("showDockIcon") private var showDockIcon = false
    @AppStorage("launchAtLogin") private var launchAtLogin = true
    @AppStorage("showUncommonAppBubbles") private var showUncommonAppBubbles = true
    @State private var selectedLanguage = L10n.currentCode
    @State private var isRefreshingLanguage = false
    @State private var allApps: [AppInfo] = []
    @State private var tagColors: [String: Int] = [:]
    private func scanApps() {
        DispatchQueue.global(qos: .userInitiated).async {
            var apps = AppIndexer.scan()
            let store = TagDatabase.load()
            apps = TagEditor.annotate(apps: apps)
            let colors = store.tags.mapValues { $0.color }
            DispatchQueue.main.async {
                allApps = apps
                tagColors = colors
            }
        }
    }
    private func exportTags() {
        let panel = NSSavePanel()
        panel.title = tr("settings.export")
        panel.nameFieldStringValue = "TagLauncher-tags.json"
        panel.allowedContentTypes = [.json]
        panel.begin { response in
            guard response == .OK, let url = panel.url else { return }
            do {
                try TagDatabase.exportTo(url)
            } catch {
                fputs("[TagLauncher] Export failed: \(error)\n", stderr)
                showDataAlert(title: tr("settings.exportFailed"), message: error.localizedDescription)
            }
        }
    }
    private func importTags() {
        let panel = NSOpenPanel()
        panel.title = tr("settings.import")
        panel.allowedContentTypes = [.json]
        panel.allowsMultipleSelection = false
        panel.begin { response in
            guard response == .OK, let url = panel.url else { return }
            do {
                _ = try TagDatabase.importFrom(url)
                scanApps()
            } catch {
                fputs("[TagLauncher] Import failed: \(error)\n", stderr)
                showDataAlert(title: tr("settings.importFailed"), message: error.localizedDescription)
            }
        }
    }
    private func showDataAlert(title: String, message: String) {
        let alert = NSAlert()
        alert.messageText = title
        alert.informativeText = message
        alert.alertStyle = .warning
        alert.runModal()
    }
    private var appVersion: String {
        Bundle.main.infoDictionary?["CFBundleShortVersionString"] as? String ?? "?"
    }
    private var buildVersion: String {
        Bundle.main.infoDictionary?["CFBundleVersion"] as? String ?? "?"
    }
    private var languageColumns: [GridItem] {
        [
            GridItem(.flexible(minimum: 220), spacing: 18, alignment: .top),
            GridItem(.flexible(minimum: 220), spacing: 18, alignment: .top),
        ]
    }
    private var displayModeColumns: [GridItem] {
        [
            GridItem(.flexible(minimum: 220), spacing: 10, alignment: .top),
            GridItem(.flexible(minimum: 220), spacing: 10, alignment: .top),
        ]
    }
    private var displayModeOptions: [(id: String, title: String)] {
        [
            ("flat", tr("settings.flat")),
            ("container", tr("settings.container")),
            ("coloredContainer", tr("settings.coloredContainer")),
            ("gridContainer", tr("settings.gridContainer")),
            ("coloredGridContainer", tr("settings.coloredGridContainer")),
        ]
    }
    private var containerDisplayModeOptions: [(id: String, title: String)] {
        Array(displayModeOptions.dropFirst())
    }
    private func generalSettingRow<Control: View>(
        _ label: String,
        description: String,
        @ViewBuilder control: () -> Control
    ) -> some View {
        HStack(alignment: .top, spacing: 16) {
            Text(label)
                .font(.system(size: 14, weight: .semibold))
                .multilineTextAlignment(.trailing)
                .lineLimit(2)
                .minimumScaleFactor(0.86)
                .frame(width: generalLabelWidth, alignment: .trailing)
                .padding(.top, 5)
            VStack(alignment: .leading, spacing: 6) {
                control()
                    .frame(width: generalControlWidth, alignment: .leading)
                Text(description)
                    .font(.caption)
                    .foregroundStyle(.secondary)
                    .multilineTextAlignment(.leading)
                    .fixedSize(horizontal: false, vertical: true)
                    .frame(width: generalControlWidth, alignment: .leading)
            }
        }
        .frame(width: generalContentWidth, alignment: .leading)
    }
    var body: some View {
        ZStack {
            TabView {
                // Tab 1: Language
                VStack(alignment: .leading, spacing: 10) {
                    Text(tr("settings.language"))
                        .font(.headline)
                    Text(tr("settings.languageDesc"))
                        .font(.caption)
                        .foregroundStyle(.secondary)
                    ScrollView {
                        LazyVGrid(columns: languageColumns, alignment: .leading, spacing: 6) {
                            ForEach(L10n.supported, id: \.code) { language in
                                Button {
                                    selectedLanguage = language.code
                                } label: {
                                    HStack(spacing: 8) {
                                        Image(systemName: selectedLanguage == language.code ? "checkmark" : "circle")
                                            .font(.system(size: 12, weight: .semibold))
                                            .foregroundStyle(selectedLanguage == language.code ? Color.accentColor : Color.secondary.opacity(0.28))
                                            .frame(width: 16)
                                        Text(language.name)
                                            .foregroundStyle(.primary)
                                            .lineLimit(1)
                                            .truncationMode(.tail)
                                        Spacer(minLength: 0)
                                    }
                                    .padding(.horizontal, 8)
                                    .padding(.vertical, 5)
                                    .contentShape(Rectangle())
                                }
                                .buttonStyle(.plain)
                                .accessibilityLabel("\(tr("settings.languagePicker")) \(language.name)")
                            }
                        }
                        .padding(.vertical, 4)
                    }
                    .frame(maxHeight: 250)
                    Spacer(minLength: 0)
                    ShortcutHintView()
                        .frame(maxWidth: .infinity, alignment: .center)
                        .padding(.bottom, 2)
                }
                .frame(maxWidth: settingsContentWidth, alignment: .leading)
                .tabItem { Label(tr("settings.language"), systemImage: "globe") }
                .padding()
                // Tab 2: General
            VStack(alignment: .leading, spacing: 0) {
                // Toggle row — centered as a rectangular block
                HStack(spacing: 20) {
                    if AppDelegate.supportsLaunchAtLogin {
                        Toggle(tr("settings.launchAtLogin"), isOn: $launchAtLogin)
                            .onChange(of: launchAtLogin) { _, enabled in
                                if enabled {
                                    AppDelegate.enableLaunchAtLogin()
                                } else {
                                    AppDelegate.disableLaunchAtLogin()
                                }
                            }
                    }
                    Toggle(tr("settings.showInDock"), isOn: $showDockIcon)
                        .onChange(of: showDockIcon) { _, _ in
                            AppDelegate.refreshChromeSettings()
                        }
                    Toggle(tr("settings.hideAppNames"), isOn: $hideAppNames)
                }
                .frame(maxWidth: .infinity, alignment: .center)
                .padding(.bottom, 16)
                Divider()
                    .padding(.bottom, 16)
                VStack(spacing: 18) {
                    generalSettingRow(tr("settings.appListStyle"), description: tr("settings.flatDesc")) {
                        VStack(spacing: 8) {
                            DisplayModeOptionButton(
                                mode: "flat",
                                title: tr("settings.flat"),
                                isSelected: displayMode == "flat"
                            ) {
                                displayMode = "flat"
                            }
                            LazyVGrid(columns: displayModeColumns, alignment: .leading, spacing: 8) {
                                ForEach(containerDisplayModeOptions, id: \.id) { option in
                                    DisplayModeOptionButton(
                                        mode: option.id,
                                        title: option.title,
                                        isSelected: displayMode == option.id
                                    ) {
                                        displayMode = option.id
                                    }
                                }
                            }
                        }
                        .frame(width: generalControlWidth, alignment: .leading)
                    }
                    generalSettingRow(tr("settings.tagPosition"), description: tr("settings.tagPosDesc")) {
                        Picker("", selection: $tagPosition) {
                            Text(tr("settings.left")).tag("left")
                            Text(tr("settings.right")).tag("right")
                            Text(tr("settings.top")).tag("top")
                        }
                        .pickerStyle(.segmented)
                        .frame(width: compactPickerWidth, alignment: .leading)
                    }
                    generalSettingRow(tr("settings.tagFontSize"), description: tr("settings.tagFontDesc")) {
                        Picker("", selection: $tagFontSize) {
                            ForEach([16.0, 18.0, 20.0, 22.0, 24.0, 26.0], id: \.self) { size in
                                Text("\(Int(size))").tag(size)
                            }
                        }
                        .pickerStyle(.segmented)
                        .frame(width: compactPickerWidth, alignment: .leading)
                    }
                    generalSettingRow(tr("settings.iconSize"), description: tr("settings.iconSizeDesc")) {
                        Picker("", selection: $iconSize) {
                            ForEach([40.0, 48.0, 56.0, 64.0, 72.0, 80.0], id: \.self) { size in
                                Text("\(Int(size))").tag(size)
                            }
                        }
                        .pickerStyle(.segmented)
                        .frame(width: compactPickerWidth, alignment: .leading)
                    }
                }
            }
            .frame(maxWidth: generalContentWidth, alignment: .center)
            .padding()
            .tabItem { Label(tr("settings.general"), systemImage: "gearshape") }
            // Tab 3: Tags
            VStack(spacing: 0) {
                TagEditorView(
                    tagColors: $tagColors,
                    excludedTagNames: ["Mac自带", defaultGroupName],
                    onRefresh: { scanApps() }
                )
            }
            .padding(.leading, 16)
            .tabItem { Label(tr("settings.tags"), systemImage: "tag.fill") }
            .onAppear { scanApps() }
            // Tab 4: Data
            VStack(spacing: 0) {
                Spacer(minLength: 54)
                VStack(alignment: .leading, spacing: 5) {
                    Toggle(tr("settings.uncommonBubble"), isOn: $showUncommonAppBubbles)
                        .font(.system(size: 13, weight: .medium))
                    Text(tr("settings.uncommonBubbleDesc"))
                        .font(.caption)
                        .foregroundStyle(.secondary)
                        .fixedSize(horizontal: false, vertical: true)
                }
                .frame(width: 420, alignment: .leading)
                Spacer(minLength: 28)
                VStack(alignment: .leading, spacing: 8) {
                    Text(tr("settings.backup"))
                        .font(.headline)
                    HStack(spacing: 12) {
                        Button(tr("settings.export")) { exportTags() }
                            .buttonStyle(.bordered)
                        Button(tr("settings.import")) { importTags() }
                            .buttonStyle(.bordered)
                    }
                    Text(tr("settings.backupDesc"))
                        .font(.caption)
                        .foregroundStyle(.secondary)
                }
                .frame(width: 420, alignment: .leading)
                Spacer(minLength: 42)
                ShortcutHintView()
                    .frame(maxWidth: .infinity, alignment: .center)
                Spacer(minLength: 18)
            }
            .tabItem { Label(tr("settings.data"), systemImage: "externaldrive.fill") }
            .padding()
            // Tab 5: About
            VStack(spacing: 0) {
                Spacer(minLength: 72)
                HStack {
                    if let icon = NSImage(named: NSImage.applicationIconName) {
                        Image(nsImage: icon)
                            .resizable()
                            .frame(width: 128, height: 128)
                    }
                    VStack(alignment: .leading, spacing: 4) {
                        Text("TagLauncher")
                            .font(.title2)
                            .fontWeight(.semibold)
                        Text(tr("app.description"))
                            .font(.body)
                            .foregroundStyle(.secondary)
                        Text("\(tr("app.version")) \(appVersion) (\(tr("app.build")) \(buildVersion))")
                            .font(.callout)
                            .foregroundStyle(.tertiary)
                        Divider()
                            .padding(.vertical, 4)
                        Text("万物之中,希望最美")
                            .font(.caption)
                            .foregroundStyle(.secondary)
                        Text("永桔@2026-18602102518")
                            .font(.caption)
                            .foregroundStyle(.secondary)
                    }
                }
                .frame(width: 560, alignment: .leading)
                Spacer(minLength: 30)
                ShortcutHintView()
                    .frame(maxWidth: .infinity, alignment: .center)
                Spacer(minLength: 18)
            }
            .tabItem { Label(tr("settings.about"), systemImage: "info.circle") }
            .padding()
            }
            .onChange(of: selectedLanguage) { _, code in
                L10n.switchTo(code)
            }
            .onReceive(NotificationCenter.default.publisher(for: .appLanguageDidChange)) { notification in
                if let code = notification.userInfo?["code"] as? String {
                    selectedLanguage = code
                }
                showLanguageRefresh()
            }
            if isRefreshingLanguage {
                ZStack {
                    Color(nsColor: .windowBackgroundColor)
                        .opacity(0.84)
                    Image(systemName: "arrow.clockwise")
                        .font(.system(size: 30, weight: .regular))
                        .symbolRenderingMode(.hierarchical)
                        .foregroundStyle(.secondary)
                }
                .transition(.opacity)
            }
        }
        .frame(width: settingsWindowWidth, height: 460)
    }
    private func showLanguageRefresh() {
        isRefreshingLanguage = true
        DispatchQueue.main.asyncAfter(deadline: .now() + 0.35) {
            withAnimation(.easeOut(duration: 0.18)) {
                isRefreshingLanguage = false
            }
        }
    }
}
private struct DisplayModeOptionButton: View {
    let mode: String
    let title: String
    let isSelected: Bool
    let action: () -> Void
    var body: some View {
        Button(action: action) {
            HStack(spacing: 7) {
                DisplayModeGlyph(mode: mode, isSelected: isSelected)
                    .frame(width: 24, height: 18)
                Text(title)
                    .font(.system(size: 13, weight: .semibold))
                    .multilineTextAlignment(.center)
                    .lineLimit(2)
                    .minimumScaleFactor(0.82)
                    .foregroundStyle(isSelected ? Color.white : Color.primary)
                    .frame(maxWidth: .infinity)
            }
            .frame(maxWidth: .infinity, minHeight: 34)
            .padding(.horizontal, 9)
            .padding(.vertical, 2)
            .background(
                RoundedRectangle(cornerRadius: 7, style: .continuous)
                    .fill(isSelected ? Color.accentColor : Color(nsColor: .controlBackgroundColor))
            )
            .overlay(
                RoundedRectangle(cornerRadius: 7, style: .continuous)
                    .stroke(isSelected ? Color.accentColor : Color.secondary.opacity(0.18), lineWidth: 1)
            )
            .contentShape(RoundedRectangle(cornerRadius: 7, style: .continuous))
        }
        .buttonStyle(.plain)
        .accessibilityLabel(title)
    }
}
private struct DisplayModeGlyph: View {
    let mode: String
    let isSelected: Bool
    var body: some View {
        switch mode {
        case "flat":
            HStack(spacing: 2) {
                cell(index: 0, width: 5, height: 5, colored: false)
                cell(index: 1, width: 5, height: 5, colored: false)
                cell(index: 2, width: 5, height: 5, colored: false)
            }
        case "gridContainer", "coloredGridContainer":
            let colored = mode == "coloredGridContainer"
            VStack(spacing: 2) {
                HStack(spacing: 2) {
                    cell(index: 0, width: 7, height: 6, colored: colored)
                    cell(index: 1, width: 7, height: 6, colored: colored)
                }
                HStack(spacing: 2) {
                    cell(index: 2, width: 7, height: 6, colored: colored)
                    cell(index: 3, width: 7, height: 6, colored: colored)
                }
            }
        default:
            let colored = mode == "coloredContainer"
            HStack(alignment: .bottom, spacing: 2) {
                cell(index: 0, width: 5, height: 8, colored: colored)
                cell(index: 1, width: 5, height: 14, colored: colored)
                cell(index: 2, width: 5, height: 10, colored: colored)
            }
        }
    }
    private func cell(index: Int, width: CGFloat, height: CGFloat, colored: Bool) -> some View {
        let fill = fillColor(index: index, colored: colored)
        let stroke = isSelected ? Color.white.opacity(0.95) : Color.secondary.opacity(0.35)
        return RoundedRectangle(cornerRadius: 1.8, style: .continuous)
            .fill(fill)
            .overlay(
                RoundedRectangle(cornerRadius: 1.8, style: .continuous)
                    .stroke(stroke, lineWidth: 0.8)
            )
            .frame(width: width, height: height)
    }
    private func fillColor(index: Int, colored: Bool) -> Color {
        if isSelected {
            return Color.white.opacity(colored ? 0.9 : 0.18)
        }
        guard colored else {
            return Color.secondary.opacity(0.12)
        }
        let palette: [Color] = [.green, .purple, .blue, .orange]
        return palette[index % palette.count].opacity(0.78)
    }
}
private struct ShortcutHintView: View {
    var body: some View {
        HStack(spacing: 12) {
            ShortcutKeycap(symbol: "⌥")
            Text("+")
                .font(.system(size: 22, weight: .semibold))
                .foregroundStyle(.tertiary)
            ShortcutKeycap(symbol: "⇧")
            Text("+")
                .font(.system(size: 22, weight: .semibold))
                .foregroundStyle(.tertiary)
            SpacebarKeycap()
        }
        .accessibilityLabel("⌥ ⇧ Space")
        .allowsHitTesting(false)
    }
}
private struct ShortcutKeycap: View {
    let symbol: String
    var body: some View {
        Text(symbol)
            .font(.system(size: 36, weight: .medium))
            .foregroundStyle(.secondary)
            .frame(width: 74, height: 58)
            .background(KeycapBackground())
    }
}
private struct SpacebarKeycap: View {
    var body: some View {
        ZStack {
            KeycapBackground()
            Capsule()
                .fill(Color.secondary.opacity(0.38))
                .frame(width: 72, height: 3)
                .offset(y: 13)
        }
        .frame(width: 190, height: 58)
    }
}
private struct KeycapBackground: View {
    var body: some View {
        RoundedRectangle(cornerRadius: 10, style: .continuous)
            .fill(Color(nsColor: .controlBackgroundColor))
            .overlay(
                RoundedRectangle(cornerRadius: 10, style: .continuous)
                    .stroke(Color.primary.opacity(0.12), lineWidth: 1)
            )
            .shadow(color: .black.opacity(0.10), radius: 8, x: 0, y: 3)
    }
}