feat: adjusted settings window to the new macOS design

Kit/module/settings.swift

@@ -73,7 +73,7 @@ open class Settings: NSStackView, Settings_p {
         self.distribution = .fill
         self.spacing = Constants.Settings.margin
         self.edgeInsets = NSEdgeInsets(
-            top: Constants.Settings.margin,
+            top: 0,
             left: Constants.Settings.margin,
             bottom: Constants.Settings.margin,
             right: Constants.Settings.margin
@@ -312,13 +312,19 @@ private class WidgetSelectorView: NSStackView {
     private var background: NSVisualEffectView = {
         let view = NSVisualEffectView(frame: NSRect.zero)
         view.blendingMode = .withinWindow
-        view.material = .contentBackground
+        if #available(macOS 26.0, *) {
+            view.material = .titlebar
+        } else {
+            view.material = .contentBackground
+        }
         view.state = .active
         view.wantsLayer = true
         view.layer?.cornerRadius = 5
         return view
     }()
     
+    private var separator: NSView?
+    
     fileprivate init(module: String, widgets: [SWidget], stateCallback: @escaping () -> Void) {
         self.module = module
         self.stateCallback = stateCallback
@@ -366,8 +372,9 @@ private class WidgetSelectorView: NSStackView {
         let separator = NSView()
         separator.identifier = NSUserInterfaceItemIdentifier(rawValue: "separator")
         separator.wantsLayer = true
-        separator.layer?.backgroundColor = NSColor(red: 213/255, green: 213/255, blue: 213/255, alpha: 1).cgColor
+        separator.layer?.backgroundColor = NSColor.separatorColor.withAlphaComponent(isDarkMode ? 0.35 : 0.15).cgColor
         self.addArrangedSubview(separator)
+        self.separator = separator
         
         inactive.forEach { (widget: WidgetPreview) in
             self.addArrangedSubview(widget)
@@ -379,7 +386,7 @@ private class WidgetSelectorView: NSStackView {
         NSLayoutConstraint.activate([
             self.heightAnchor.constraint(equalToConstant: Constants.Widget.height + (Constants.Settings.margin*2)),
             separator.widthAnchor.constraint(equalToConstant: 1),
-            separator.heightAnchor.constraint(equalTo: self.heightAnchor, constant: -6)
+            separator.heightAnchor.constraint(equalTo: self.heightAnchor, constant: -18)
         ])
     }
     
@@ -389,6 +396,7 @@ private class WidgetSelectorView: NSStackView {
     
     override func updateLayer() {
         self.background.setFrameSize(self.frame.size)
+        self.separator?.layer?.backgroundColor = NSColor.separatorColor.withAlphaComponent(isDarkMode ? 0.35 : 0.15).cgColor
     }
     
     override func mouseUp(with event: NSEvent) {

Stats/Views/AppSettings.swift

@@ -65,7 +65,7 @@ class ApplicationSettings: NSStackView {
         
         let scrollView = ScrollableStackView(orientation: .vertical)
         scrollView.stackView.edgeInsets = NSEdgeInsets(
-            top: Constants.Settings.margin,
+            top: 0,
             left: Constants.Settings.margin,
             bottom: Constants.Settings.margin,
             right: Constants.Settings.margin

Stats/Views/Dashboard.swift

@@ -181,7 +181,7 @@ class Dashboard: NSStackView {
         
         let scrollView = ScrollableStackView(orientation: .vertical)
         scrollView.stackView.edgeInsets = NSEdgeInsets(
-            top: Constants.Settings.margin,
+            top: 0,
             left: Constants.Settings.margin,
             bottom: Constants.Settings.margin,
             right: Constants.Settings.margin

Stats/Views/Settings.swift

@@ -71,7 +71,9 @@ class SettingsWindow: NSWindow, NSWindowDelegate, NSToolbarDelegate {
         self.toolbar = newToolbar
         self.contentViewController = sidebarViewController
         self.titlebarAppearsTransparent = true
-        self.backgroundColor = .clear
+        if #unavailable(macOS 26.0) {
+            self.backgroundColor = .clear
+        }
         self.positionCenter()
         self.setIsVisible(false)
         
@@ -80,7 +82,6 @@ class SettingsWindow: NSWindow, NSWindowDelegate, NSToolbarDelegate {
         windowController.loadWindow()
         
         NSLayoutConstraint.activate([
-            self.sidebarView.widthAnchor.constraint(equalToConstant: 180),
             self.mainView.widthAnchor.constraint(equalToConstant: 540),
             self.mainView.container.widthAnchor.constraint(equalToConstant: 540),
             self.mainView.container.topAnchor.constraint(equalTo: (self.contentLayoutGuide as! NSLayoutGuide).topAnchor),
@@ -126,6 +127,7 @@ class SettingsWindow: NSWindow, NSWindowDelegate, NSToolbarDelegate {
                 switchButton.state = .on
                 switchButton.action = #selector(self.toggleEnable)
                 switchButton.target = self
+                switchButton.controlSize = .small
                 toggleBtn = switchButton
             } else {
                 let button: NSButton = NSButton()
@@ -143,6 +145,7 @@ class SettingsWindow: NSWindow, NSWindowDelegate, NSToolbarDelegate {
             let toolbarItem = NSToolbarItem(itemIdentifier: itemIdentifier)
             toolbarItem.toolTip = localizedString("Toggle the module")
             toolbarItem.view = toggleBtn
+            toolbarItem.isBordered = false
             
             return toolbarItem
         default: