fix: use sidebar settings layout

apps/macos/Sources/Clawdbot/SettingsRootView.swift

@@ -18,64 +18,29 @@ struct SettingsRootView: View {
     }
 
     var body: some View {
+        NavigationSplitView {
+            List(selection: self.$selectedTab) {
+                Section("Settings") {
+                    ForEach(self.sidebarTabs, id: \.self) { tab in
+                        Label(tab.title, systemImage: tab.systemImage)
+                            .tag(tab)
+                    }
+                }
+            }
+            .listStyle(.sidebar)
+            .frame(minWidth: 200, idealWidth: 220, maxWidth: 260)
+        } detail: {
             VStack(alignment: .leading, spacing: 12) {
                 if self.isNixMode {
                     self.nixManagedBanner
                 }
-            TabView(selection: self.$selectedTab) {
+                self.detailView(for: self.selectedTab)
-                GeneralSettings(state: self.state)
-                    .tabItem { Label("General", systemImage: "gearshape") }
-                    .tag(SettingsTab.general)
-
-                ConnectionsSettings()
-                    .tabItem { Label("Connections", systemImage: "link") }
-                    .tag(SettingsTab.connections)
-
-                VoiceWakeSettings(state: self.state)
-                    .tabItem { Label("Voice Wake", systemImage: "waveform.circle") }
-                    .tag(SettingsTab.voiceWake)
-
-                ConfigSettings()
-                    .tabItem { Label("Config", systemImage: "slider.horizontal.3") }
-                    .tag(SettingsTab.config)
-
-                InstancesSettings()
-                    .tabItem { Label("Instances", systemImage: "network") }
-                    .tag(SettingsTab.instances)
-
-                SessionsSettings()
-                    .tabItem { Label("Sessions", systemImage: "clock.arrow.circlepath") }
-                    .tag(SettingsTab.sessions)
-
-                CronSettings()
-                    .tabItem { Label("Cron", systemImage: "calendar") }
-                    .tag(SettingsTab.cron)
-
-                SkillsSettings(state: self.state)
-                    .tabItem { Label("Skills", systemImage: "sparkles") }
-                    .tag(SettingsTab.skills)
-
-                PermissionsSettings(
-                    status: self.permissionMonitor.status,
-                    refresh: self.refreshPerms,
-                    showOnboarding: { OnboardingController.shared.show() })
-                    .tabItem { Label("Permissions", systemImage: "lock.shield") }
-                    .tag(SettingsTab.permissions)
-
-                if self.state.debugPaneEnabled {
-                    DebugSettings(state: self.state)
-                        .tabItem { Label("Debug", systemImage: "ant") }
-                        .tag(SettingsTab.debug)
-                }
-
-                AboutSettings(updater: self.updater)
-                    .tabItem { Label("About", systemImage: "info.circle") }
-                    .tag(SettingsTab.about)
-            }
-            .tabViewStyle(.sidebar)
             }
             .padding(.horizontal, 28)
             .padding(.vertical, 22)
+            .frame(maxWidth: .infinity, maxHeight: .infinity, alignment: .topLeading)
+        }
+        .navigationSplitViewStyle(.balanced)
         .frame(width: SettingsTab.windowWidth, height: SettingsTab.windowHeight, alignment: .topLeading)
         .frame(maxWidth: .infinity, maxHeight: .infinity, alignment: .topLeading)
         .onReceive(NotificationCenter.default.publisher(for: .clawdbotSelectSettingsTab)) { note in
@@ -145,6 +110,56 @@ struct SettingsRootView: View {
         return requested
     }
 
+    private var sidebarTabs: [SettingsTab] {
+        var tabs: [SettingsTab] = [
+            .general,
+            .connections,
+            .voiceWake,
+            .config,
+            .instances,
+            .sessions,
+            .cron,
+            .skills,
+            .permissions,
+        ]
+        if self.state.debugPaneEnabled {
+            tabs.append(.debug)
+        }
+        tabs.append(.about)
+        return tabs
+    }
+
+    @ViewBuilder
+    private func detailView(for tab: SettingsTab) -> some View {
+        switch tab {
+        case .general:
+            GeneralSettings(state: self.state)
+        case .connections:
+            ConnectionsSettings()
+        case .voiceWake:
+            VoiceWakeSettings(state: self.state)
+        case .config:
+            ConfigSettings()
+        case .instances:
+            InstancesSettings()
+        case .sessions:
+            SessionsSettings()
+        case .cron:
+            CronSettings()
+        case .skills:
+            SkillsSettings(state: self.state)
+        case .permissions:
+            PermissionsSettings(
+                status: self.permissionMonitor.status,
+                refresh: self.refreshPerms,
+                showOnboarding: { OnboardingController.shared.show() })
+        case .debug:
+            DebugSettings(state: self.state)
+        case .about:
+            AboutSettings(updater: self.updater)
+        }
+    }
+
     @MainActor
     private func refreshSnapshotPaths() async {
         let paths = await GatewayConnection.shared.snapshotPaths()
@@ -195,6 +210,22 @@ enum SettingsTab: CaseIterable {
         case .about: "About"
         }
     }
+
+    var systemImage: String {
+        switch self {
+        case .general: "gearshape"
+        case .connections: "link"
+        case .skills: "sparkles"
+        case .sessions: "clock.arrow.circlepath"
+        case .cron: "calendar"
+        case .config: "slider.horizontal.3"
+        case .instances: "network"
+        case .voiceWake: "waveform.circle"
+        case .permissions: "lock.shield"
+        case .debug: "ant"
+        case .about: "info.circle"
+        }
+    }
 }
 
 @MainActor