0.5.0

设置优化

.gitignore

@@ -482,3 +482,5 @@ $RECYCLE.BIN/
 *.swp
 nul
 /publish-test
+/_build_verify
+/_build_verify_tray

LanMountainDesktop/App.axaml

@@ -22,6 +22,8 @@
                       ToolTipText="LanMountainDesktop">
                 <TrayIcon.Menu>
                     <NativeMenu>
+                        <NativeMenuItem Header="设置" Click="OnTraySettingsClick" />
+                        <NativeMenuItemSeparator />
                         <NativeMenuItem Header="重启应用" Click="OnTrayRestartClick" />
                         <NativeMenuItemSeparator />
                         <NativeMenuItem Header="退出应用" Click="OnTrayExitClick" />

LanMountainDesktop/App.axaml.cs

@@ -6,6 +6,7 @@ using System;
 using System.Diagnostics;
 using System.Linq;
 using Avalonia.Markup.Xaml;
+using Avalonia.Threading;
 using LanMountainDesktop.Services;
 using LanMountainDesktop.ViewModels;
 using LanMountainDesktop.Views;
@@ -15,6 +16,8 @@ namespace LanMountainDesktop;
 
 public partial class App : Application
 {
+    private SettingsWindow? _traySettingsWindow;
+
     public override void Initialize()
     {
         ConfigureWebViewUserDataFolder();
@@ -31,6 +34,7 @@ public partial class App : Application
             // Avoid duplicate validations from both Avalonia and the CommunityToolkit. 
             // More info: https://docs.avaloniaui.net/docs/guides/development-guides/data-validation#manage-validationplugins
             DisableAvaloniaDataAnnotationValidation();
+            desktop.ShutdownMode = Avalonia.Controls.ShutdownMode.OnExplicitShutdown;
             desktop.MainWindow = new MainWindow
             {
                 DataContext = new MainWindowViewModel(),
@@ -48,6 +52,44 @@ public partial class App : Application
         }
     }
 
+    private void OnTraySettingsClick(object? sender, EventArgs e)
+    {
+        if (ApplicationLifetime is not IClassicDesktopStyleApplicationLifetime)
+        {
+            return;
+        }
+
+        Dispatcher.UIThread.Post(() =>
+        {
+            try
+            {
+                if (_traySettingsWindow is { } existingWindow && existingWindow.IsVisible)
+                {
+                    existingWindow.WindowState = Avalonia.Controls.WindowState.Normal;
+                    existingWindow.Activate();
+                    return;
+                }
+
+                var settingsWindow = new SettingsWindow();
+                settingsWindow.Closed += (_, _) =>
+                {
+                    if (ReferenceEquals(_traySettingsWindow, settingsWindow))
+                    {
+                        _traySettingsWindow = null;
+                    }
+                };
+
+                _traySettingsWindow = settingsWindow;
+                settingsWindow.Show();
+                settingsWindow.Activate();
+            }
+            catch (Exception ex)
+            {
+                Debug.WriteLine($"[TraySettings] Failed to open settings window: {ex}");
+            }
+        }, DispatcherPriority.Normal);
+    }
+
     private void OnTrayRestartClick(object? sender, EventArgs e)
     {
         if (ApplicationLifetime is not IClassicDesktopStyleApplicationLifetime desktop)

LanMountainDesktop/Services/AppSettingsService.cs

@@ -7,6 +7,8 @@ namespace LanMountainDesktop.Services;
 
 public sealed class AppSettingsService
 {
+    public static event Action<string>? SettingsSaved;
+
     private static readonly JsonSerializerOptions SerializerOptions = new()
     {
         WriteIndented = true
@@ -21,6 +23,8 @@ public sealed class AppSettingsService
 
     private readonly string _settingsPath;
 
+    public string InstanceId { get; } = Guid.NewGuid().ToString("N");
+
     public AppSettingsService()
     {
         var appData = Environment.GetFolderPath(Environment.SpecialFolder.LocalApplicationData);
@@ -88,6 +92,8 @@ public sealed class AppSettingsService
             {
                 UpdateCache(snapshotToPersist, writeTimeUtc, DateTime.UtcNow);
             }
+
+            SettingsSaved?.Invoke(InstanceId);
         }
         catch
         {

LanMountainDesktop/Services/LauncherSettingsService.cs

@@ -9,6 +9,8 @@ namespace LanMountainDesktop.Services;
 
 public sealed class LauncherSettingsService
 {
+    public static event Action<string>? SettingsSaved;
+
     private static readonly JsonSerializerOptions SerializerOptions = new()
     {
         WriteIndented = true
@@ -24,6 +26,8 @@ public sealed class LauncherSettingsService
     private readonly string _settingsPath;
     private readonly string _legacyAppSettingsPath;
 
+    public string InstanceId { get; } = Guid.NewGuid().ToString("N");
+
     public LauncherSettingsService()
     {
         var appData = Environment.GetFolderPath(Environment.SpecialFolder.LocalApplicationData);
@@ -99,6 +103,8 @@ public sealed class LauncherSettingsService
             {
                 UpdateCache(snapshotToPersist, writeTimeUtc, DateTime.UtcNow);
             }
+
+            SettingsSaved?.Invoke(InstanceId);
         }
         catch
         {

LanMountainDesktop/Views/MainWindow.ComponentSystem.cs

@@ -256,14 +256,15 @@ public partial class MainWindow
             return TaskbarContext.Desktop;
         }
 
-        return SettingsNavListBox?.SelectedIndex switch
+        var selectedItem = SettingsNavView?.SelectedItem as FluentAvalonia.UI.Controls.NavigationViewItem;
+        return selectedItem?.Tag?.ToString() switch
         {
-            0 => TaskbarContext.SettingsWallpaper,
-            1 => TaskbarContext.SettingsGrid,
-            2 => TaskbarContext.SettingsColor,
-            3 => TaskbarContext.SettingsStatusBar,
-            4 => TaskbarContext.SettingsWeather,
-            5 => TaskbarContext.SettingsRegion,
+            "Wallpaper" => TaskbarContext.SettingsWallpaper,
+            "Grid" => TaskbarContext.SettingsGrid,
+            "Color" => TaskbarContext.SettingsColor,
+            "StatusBar" => TaskbarContext.SettingsStatusBar,
+            "Weather" => TaskbarContext.SettingsWeather,
+            "Region" => TaskbarContext.SettingsRegion,
             _ => TaskbarContext.Desktop
         };
     }

LanMountainDesktop/Views/MainWindow.Localization.cs

@@ -107,16 +107,16 @@ public partial class MainWindow
         ToolTip.SetTip(LauncherFolderBackButton, L("common.back", "Back"));
         ToolTip.SetTip(LauncherFolderCloseButton, L("common.close", "Close"));
 
-        SettingsNavHeaderTextBlock.Text = L("settings.nav_header", "Settings");
-        SettingsNavWallpaperTextBlock.Text = L("settings.nav.wallpaper", "Wallpaper");
-        SettingsNavGridTextBlock.Text = L("settings.nav.grid", "Grid");
-        SettingsNavColorTextBlock.Text = L("settings.nav.color", "Color");
-        SettingsNavStatusBarTextBlock.Text = L("settings.nav.status_bar", "Status Bar");
-        SettingsNavWeatherTextBlock.Text = L("settings.nav.weather", "Weather");
-        SettingsNavRegionTextBlock.Text = L("settings.nav.region", "Region");
-        SettingsNavUpdateTextBlock.Text = L("settings.nav.update", "Update");
-        SettingsNavLauncherTextBlock.Text = L("settings.nav.launcher", "App Launcher");
-        SettingsNavPluginsTextBlock.Text = L("settings.nav.plugins", "Plugins");
+        // SettingsNavHeaderTextBlock no longer exists
+        SettingsNavWallpaperItem.Content = L("settings.nav.wallpaper", "Wallpaper");
+        SettingsNavGridItem.Content = L("settings.nav.grid", "Grid");
+        SettingsNavColorItem.Content = L("settings.nav.color", "Color");
+        SettingsNavStatusBarItem.Content = L("settings.nav.status_bar", "Status Bar");
+        SettingsNavWeatherItem.Content = L("settings.nav.weather", "Weather");
+        SettingsNavRegionItem.Content = L("settings.nav.region", "Region");
+        SettingsNavUpdateItem.Content = L("settings.nav.update", "Update");
+        SettingsNavLauncherItem.Content = L("settings.nav.launcher", "App Launcher");
+        SettingsNavPluginsItem.Content = L("settings.nav.plugins", "Plugins");
 
         WallpaperPanelTitleTextBlock.Text = L("settings.wallpaper.title", "Personalize your wallpaper");
         WallpaperPlacementSettingsExpander.Header = L("settings.wallpaper.placement_label", "Placement");
@@ -127,10 +127,10 @@ public partial class MainWindow
         ClearWallpaperButton.Content = L("settings.wallpaper.clear_button", "Reset");
 
         GridPanelTitleTextBlock.Text = L("settings.grid.title", "Grid Layout");
-        GridSpacingPresetLabelTextBlock.Text = L("settings.grid.spacing_label", "Grid Spacing");
+        GridSpacingSettingsExpander.Header = L("settings.grid.spacing_label", "Grid Spacing");
         GridSpacingRelaxedComboBoxItem.Content = L("settings.grid.spacing_relaxed", "Relaxed");
         GridSpacingCompactComboBoxItem.Content = L("settings.grid.spacing_compact", "Compact");
-        GridEdgeInsetLabelTextBlock.Text = L("settings.grid.edge_inset_label", "Screen Inset");
+        GridEdgeInsetSettingsExpander.Header = L("settings.grid.edge_inset_label", "Screen Inset");
         ApplyGridButton.Content = L("settings.grid.apply_button", "Apply");
         UpdateGridEdgeInsetComputedPxText(_currentDesktopCellSize);
 
@@ -175,7 +175,7 @@ public partial class MainWindow
         StatusBarSpacingModeCompactItem.Content = L("settings.status_bar.spacing_mode_compact", "Compact");
         StatusBarSpacingModeRelaxedItem.Content = L("settings.status_bar.spacing_mode_relaxed", "Relaxed");
         StatusBarSpacingModeCustomItem.Content = L("settings.status_bar.spacing_mode_custom", "Custom");
-        StatusBarSpacingCustomLabelTextBlock.Text = L("settings.status_bar.spacing_custom_label", "Custom spacing (%)");
+        StatusBarSpacingCustomPanel.Content = L("settings.status_bar.spacing_custom_label", "Custom spacing (%)");
 
         WeatherPanelTitleTextBlock.Text = L("settings.weather.title", "Weather");
         WeatherLocationSettingsExpander.Header = L("settings.weather.location_source_header", "Location Source");
@@ -212,6 +212,14 @@ public partial class MainWindow
             "Refresh and verify current weather service status.");
         WeatherPreviewButton.Content = L("settings.weather.refresh_button", "Refresh");
 
+        WeatherLocationSettingsExpander.Header = L("settings.weather.location_msg_header", "Location Source");
+        WeatherLocationSettingsExpander.Description = L(
+            "settings.weather.location_msg_desc",
+            "Choose how weather widgets resolve location.");
+        WeatherLocationModeCityChipItem.Content = L("settings.weather.mode_city", "City Search");
+        WeatherLocationModeCoordinatesChipItem.Content = L("settings.weather.mode_coordinates", "Coordinates");
+        WeatherAutoRefreshToggleSwitch.Content = L("settings.weather.auto_location_toggle", "Auto refresh location on startup");
+
         WeatherAlertFilterSettingsExpander.Header = L("settings.weather.alert_filter_header", "Excluded Alerts");
         WeatherAlertFilterSettingsExpander.Description = L(
             "settings.weather.alert_filter_desc",
@@ -248,6 +256,7 @@ public partial class MainWindow
 
         RegionPanelTitleTextBlock.Text = L("settings.region.title", "Region");
         LanguageSettingsExpander.Header = L("settings.region.language_header", "Language");
+        LanguageSettingsExpander.Description = L("settings.region.language_desc", "Select application language. Changes apply immediately.");
         LanguageChineseItem.Content = L("settings.region.language_zh", "Chinese");
         LanguageEnglishItem.Content = L("settings.region.language_en", "English");
         TimeZoneSettingsExpander.Header = L("settings.region.timezone_header", "Time Zone");
@@ -279,7 +288,7 @@ public partial class MainWindow
             "settings.plugins.runtime_status",
             "Plugin management UI is not connected yet. Next step is wiring the loader, permissions, and worker isolation state into this panel.");
 
-        SettingsNavAboutTextBlock.Text = L("settings.nav.about", "About");
+        SettingsNavAboutItem.Content = L("settings.nav.about", "About");
         AboutPanelTitleTextBlock.Text = L("settings.about.title", "About");
         VersionTextBlock.Text = Lf(
             "settings.about.version_format",

LanMountainDesktop/Views/MainWindow.Settings.cs

@@ -1,5 +1,6 @@
 using System;
 using FluentIcons.Avalonia;
+using FluentIcons.Avalonia.Fluent;
 using FluentIcons.Common;
 using LanMountainDesktop.Views.Components;
 
@@ -19,6 +20,7 @@ using Avalonia.Platform;
 using Avalonia.Platform.Storage;
 using Avalonia.Styling;
 using Avalonia.Threading;
+using LanMountainDesktop.ComponentSystem;
 using LanMountainDesktop.Models;
 using LanMountainDesktop.Services;
 using LanMountainDesktop.Theme;
@@ -28,6 +30,47 @@ namespace LanMountainDesktop.Views;
 
 public partial class MainWindow
 {
+    private void OnExternalAppSettingsSaved(string sourceInstanceId)
+    {
+        if (string.Equals(sourceInstanceId, _appSettingsService.InstanceId, StringComparison.Ordinal))
+        {
+            return;
+        }
+
+        ScheduleReloadFromExternalSettings();
+    }
+
+    private void OnExternalLauncherSettingsSaved(string sourceInstanceId)
+    {
+        if (string.Equals(sourceInstanceId, _launcherSettingsService.InstanceId, StringComparison.Ordinal))
+        {
+            return;
+        }
+
+        ScheduleReloadFromExternalSettings();
+    }
+
+    private void ScheduleReloadFromExternalSettings()
+    {
+        if (_externalSettingsReloadPending)
+        {
+            return;
+        }
+
+        _externalSettingsReloadPending = true;
+        Dispatcher.UIThread.Post(() =>
+        {
+            _externalSettingsReloadPending = false;
+
+            if (!IsVisible)
+            {
+                return;
+            }
+
+            ReloadFromPersistedSettings();
+        }, DispatcherPriority.Background);
+    }
+
     private void OnOpenSettingsClick(object? sender, RoutedEventArgs e)
     {
         if (_isComponentLibraryOpen)
@@ -49,16 +92,37 @@ public partial class MainWindow
         CloseSettingsPage();
     }
 
-    private void OnSettingsNavSelectionChanged(object? sender, SelectionChangedEventArgs e)
+    private void OnSettingsNavSelectionChanged(object? sender, FluentAvalonia.UI.Controls.NavigationViewSelectionChangedEventArgs e)
     {
         UpdateSettingsTabContent();
         PersistSettings();
     }
 
+    private int GetSettingsTabIndex()
+    {
+        if (SettingsNavView?.SelectedItem is FluentAvalonia.UI.Controls.NavigationViewItem item)
+        {
+            return item.Tag?.ToString() switch
+            {
+                "Wallpaper" => 0,
+                "Grid" => 1,
+                "Color" => 2,
+                "StatusBar" => 3,
+                "Weather" => 4,
+                "Region" => 5,
+                "Update" => 6,
+                "About" => 7,
+                "Launcher" => 8,
+                "Plugins" => 9,
+                _ => 0
+            };
+        }
+        return 0;
+    }
+
     private void UpdateSettingsTabContent()
     {
-        // SelectionChanged can fire during XAML initialization before all named controls are assigned.
-        if (SettingsNavListBox is null ||
+        if (SettingsNavView is null ||
             GridSettingsPanel is null ||
             WallpaperSettingsPanel is null ||
             ColorSettingsPanel is null ||
@@ -73,24 +137,26 @@ public partial class MainWindow
             return;
         }
 
-        var selectedIndex = SettingsNavListBox.SelectedIndex;
-        WallpaperSettingsPanel.IsVisible = selectedIndex == 0;
-        GridSettingsPanel.IsVisible = selectedIndex == 1;
-        ColorSettingsPanel.IsVisible = selectedIndex == 2;
-        StatusBarSettingsPanel.IsVisible = selectedIndex == 3;
-        WeatherSettingsPanel.IsVisible = selectedIndex == 4;
-        RegionSettingsPanel.IsVisible = selectedIndex == 5;
-        UpdateSettingsPanel.IsVisible = selectedIndex == 6;
-        AboutSettingsPanel.IsVisible = selectedIndex == 7;
-        LauncherSettingsPanel.IsVisible = selectedIndex == 8;
-        PluginSettingsPanel.IsVisible = selectedIndex == 9;
+        var selectedItem = SettingsNavView.SelectedItem as FluentAvalonia.UI.Controls.NavigationViewItem;
+        var tag = selectedItem?.Tag?.ToString();
 
-        if (selectedIndex == 8)
+        WallpaperSettingsPanel.IsVisible = tag == "Wallpaper";
+        GridSettingsPanel.IsVisible = tag == "Grid";
+        ColorSettingsPanel.IsVisible = tag == "Color";
+        StatusBarSettingsPanel.IsVisible = tag == "StatusBar";
+        WeatherSettingsPanel.IsVisible = tag == "Weather";
+        RegionSettingsPanel.IsVisible = tag == "Region";
+        UpdateSettingsPanel.IsVisible = tag == "Update";
+        AboutSettingsPanel.IsVisible = tag == "About";
+        LauncherSettingsPanel.IsVisible = tag == "Launcher";
+        PluginSettingsPanel.IsVisible = tag == "Plugins";
+
+        if (tag == "Launcher")
         {
             RenderLauncherHiddenItemsList();
         }
 
-        if (selectedIndex == 1)
+        if (tag == "Grid")
         {
             UpdateGridPreviewLayout();
         }
@@ -867,6 +933,105 @@ public partial class MainWindow
         _appSettingsService.Save(BuildAppSettingsSnapshot());
         _desktopLayoutSettingsService.Save(BuildDesktopLayoutSettingsSnapshot());
         _launcherSettingsService.Save(BuildLauncherSettingsSnapshot());
+
+    }
+
+    internal void ReloadFromPersistedSettings()
+    {
+        _suppressSettingsPersistence = true;
+        try
+        {
+            var snapshot = _appSettingsService.Load();
+            var desktopLayoutSnapshot = _desktopLayoutSettingsService.Load();
+            var launcherSnapshot = _launcherSettingsService.Load();
+
+            if (!string.IsNullOrWhiteSpace(snapshot.TimeZoneId))
+            {
+                _timeZoneService.SetTimeZoneById(snapshot.TimeZoneId);
+            }
+
+            _targetShortSideCells = Math.Clamp(
+                snapshot.GridShortSideCells > 0 ? snapshot.GridShortSideCells : CalculateDefaultShortSideCellCountFromDpi(),
+                MinShortSideCells,
+                MaxShortSideCells);
+
+            _gridSpacingPreset = NormalizeGridSpacingPreset(snapshot.GridSpacingPreset);
+            _suppressGridSpacingEvents = true;
+            GridSpacingPresetComboBox.SelectedIndex =
+                string.Equals(_gridSpacingPreset, "Compact", StringComparison.OrdinalIgnoreCase) ? 1 : 0;
+            _suppressGridSpacingEvents = false;
+
+            _desktopEdgeInsetPercent = Math.Clamp(snapshot.DesktopEdgeInsetPercent, MinEdgeInsetPercent, MaxEdgeInsetPercent);
+            _suppressGridInsetEvents = true;
+            GridEdgeInsetSlider.Value = _desktopEdgeInsetPercent;
+            GridEdgeInsetNumberBox.Value = _desktopEdgeInsetPercent;
+            _suppressGridInsetEvents = false;
+
+            _statusBarSpacingMode = NormalizeStatusBarSpacingMode(snapshot.StatusBarSpacingMode);
+            _statusBarCustomSpacingPercent = Math.Clamp(snapshot.StatusBarCustomSpacingPercent, 0, 30);
+            _suppressStatusBarSpacingEvents = true;
+            StatusBarSpacingModeComboBox.SelectedIndex = _statusBarSpacingMode switch
+            {
+                "Compact" => 0,
+                "Custom" => 2,
+                _ => 1
+            };
+            StatusBarSpacingSlider.Value = _statusBarCustomSpacingPercent;
+            StatusBarSpacingNumberBox.Value = _statusBarCustomSpacingPercent;
+            StatusBarSpacingCustomPanel.IsVisible = string.Equals(_statusBarSpacingMode, "Custom", StringComparison.OrdinalIgnoreCase);
+            _suppressStatusBarSpacingEvents = false;
+
+            GridSizeNumberBox.Value = _targetShortSideCells;
+            GridSizeSlider.Value = _targetShortSideCells;
+
+            if (SettingsNavView.MenuItems.ElementAtOrDefault(Math.Clamp(snapshot.SettingsTabIndex, 0, 9)) is FluentAvalonia.UI.Controls.NavigationViewItem navItem)
+            {
+                SettingsNavView.SelectedItem = navItem;
+            }
+
+            UpdateSettingsTabContent();
+            WallpaperPlacementComboBox.SelectedIndex = GetPlacementIndexFromSetting(snapshot.WallpaperPlacement);
+            _defaultDesktopBackground = DesktopWallpaperLayer.Background;
+            ApplyTaskbarSettings(snapshot);
+            InitializeLocalization(snapshot.LanguageCode);
+            InitializeWeatherSettings(snapshot);
+            _ = _componentSettingsService.Load();
+            InitializeAutoStartWithWindowsSetting(snapshot);
+            InitializeUpdateSettings(snapshot);
+            InitializeDesktopSurfaceState(desktopLayoutSnapshot);
+            InitializeLauncherVisibilitySettings(launcherSnapshot);
+            InitializeDesktopComponentPlacements(desktopLayoutSnapshot);
+            InitializeSettingsIcons();
+
+            TryRestoreWallpaper(snapshot.WallpaperPath);
+            ApplyWallpaperBrush();
+            UpdateWallpaperDisplay();
+
+            if (TryParseColor(snapshot.ThemeColor, out var savedThemeColor))
+            {
+                _selectedThemeColor = savedThemeColor;
+            }
+
+            _isNightMode = snapshot.IsNightMode ?? (CalculateCurrentBackgroundLuminance() < LightBackgroundLuminanceThreshold);
+            ApplyNightModeState(_isNightMode, refreshPalettes: true);
+            _suppressStatusBarToggleEvents = true;
+            StatusBarClockToggleSwitch.IsChecked = _topStatusComponentIds.Contains(BuiltInComponentIds.Clock);
+            _suppressStatusBarToggleEvents = false;
+            ApplyLocalization();
+            ThemeColorStatusTextBlock.Text = Lf("settings.color.theme_ready_format", "Theme color ready: {0}.", _selectedThemeColor);
+            RebuildDesktopGrid();
+            LoadLauncherEntriesAsync();
+            InitializeTimeZoneSettings();
+            ClockWidget.SetTimeZoneService(_timeZoneService);
+            UpdateWallpaperPreviewLayout();
+            UpdateGridPreviewLayout();
+            UpdateAdaptiveTextSystem();
+            ApplyTaskbarActionVisibility(GetCurrentTaskbarContext());
+        }
+        finally
+        {
+            _suppressSettingsPersistence = false;
+        }
     }
 
     private AppSettingsSnapshot BuildAppSettingsSnapshot()
@@ -880,7 +1045,7 @@ public partial class MainWindow
             ThemeColor = _selectedThemeColor.ToString(),
             WallpaperPath = _wallpaperPath,
             WallpaperPlacement = GetPlacementDisplayName(GetSelectedWallpaperPlacement()),
-            SettingsTabIndex = Math.Max(0, SettingsNavListBox?.SelectedIndex ?? 0),
+            SettingsTabIndex = Math.Max(0, GetSettingsTabIndex()),
             LanguageCode = _languageCode,
             TimeZoneId = _timeZoneService.CurrentTimeZone.Id,
             WeatherLocationMode = ToWeatherLocationModeTag(_weatherLocationMode),
@@ -1772,7 +1937,7 @@ public partial class MainWindow
             : CalculateCurrentBackgroundLuminance() >= LightBackgroundLuminanceThreshold;
         var isLightNavBackground = _isSettingsOpen
             ? !_isNightMode
-            : CalculateBrushLuminance(SettingsNavPanelBorder?.Background) >= LightBackgroundLuminanceThreshold;
+            : CalculateBrushLuminance(SettingsNavView?.Background) >= LightBackgroundLuminanceThreshold;
         var context = new ThemeColorContext(
             _selectedThemeColor,
             isLightBackground,
@@ -2306,4 +2471,211 @@ public partial class MainWindow
             IconVariant = IconVariant.Regular
         };
     }
+
+    // ========================================================================
+    // --- UserControl Forwarding Properties (Definitive Catch-All List) ---
+    // These properties allow legacy code in MainWindow.axaml.cs and other partials
+    // to access controls that have been moved into independent UserControls.
+    // ========================================================================
+
+    // --- WallpaperSettingsPage ---
+    internal TextBlock WallpaperPanelTitleTextBlock => WallpaperSettingsPanel.FindControl<TextBlock>("WallpaperPanelTitleTextBlock")!;
+    internal TextBlock WallpaperPathTextBlock => WallpaperSettingsPanel.FindControl<TextBlock>("WallpaperPathTextBlock")!;
+    internal TextBlock WallpaperStatusTextBlock => WallpaperSettingsPanel.FindControl<TextBlock>("WallpaperStatusTextBlock")!;
+    internal ComboBox WallpaperPlacementComboBox => WallpaperSettingsPanel.FindControl<ComboBox>("WallpaperPlacementComboBox")!;
+    internal Border WallpaperPreviewHost => WallpaperSettingsPanel.FindControl<Border>("WallpaperPreviewHost")!;
+    internal Border WallpaperPreviewFrame => WallpaperSettingsPanel.FindControl<Border>("WallpaperPreviewFrame")!;
+    internal Border WallpaperPreviewViewport => WallpaperSettingsPanel.FindControl<Border>("WallpaperPreviewViewport")!;
+    internal LibVLCSharp.Avalonia.VideoView? WallpaperPreviewVideoView => WallpaperSettingsPanel.FindControl<LibVLCSharp.Avalonia.VideoView>("WallpaperPreviewVideoView");
+    internal Grid WallpaperPreviewGrid => WallpaperSettingsPanel.FindControl<Grid>("WallpaperPreviewGrid")!;
+    internal Border WallpaperPreviewTopStatusBarHost => WallpaperSettingsPanel.FindControl<Border>("WallpaperPreviewTopStatusBarHost")!;
+    internal StackPanel WallpaperPreviewTopStatusComponentsPanel => WallpaperSettingsPanel.FindControl<StackPanel>("WallpaperPreviewTopStatusComponentsPanel")!;
+    internal LanMountainDesktop.Views.Components.ClockWidget WallpaperPreviewClockWidget => WallpaperSettingsPanel.FindControl<LanMountainDesktop.Views.Components.ClockWidget>("WallpaperPreviewClockWidget")!;
+    internal Border WallpaperPreviewBottomTaskbarContainer => WallpaperSettingsPanel.FindControl<Border>("WallpaperPreviewBottomTaskbarContainer")!;
+    internal Border WallpaperPreviewTaskbarFixedActionsHost => WallpaperSettingsPanel.FindControl<Border>("WallpaperPreviewTaskbarFixedActionsHost")!;
+    internal StackPanel WallpaperPreviewBackButtonVisual => WallpaperSettingsPanel.FindControl<StackPanel>("WallpaperPreviewBackButtonVisual")!;
+    internal TextBlock WallpaperPreviewBackButtonTextBlock => WallpaperSettingsPanel.FindControl<TextBlock>("WallpaperPreviewBackButtonTextBlock")!;
+    internal StackPanel WallpaperPreviewTaskbarDynamicActionsHost => WallpaperSettingsPanel.FindControl<StackPanel>("WallpaperPreviewTaskbarDynamicActionsHost")!;
+    internal Border WallpaperPreviewTaskbarSettingsActionHost => WallpaperSettingsPanel.FindControl<Border>("WallpaperPreviewTaskbarSettingsActionHost")!;
+    internal StackPanel WallpaperPreviewComponentLibraryVisual => WallpaperSettingsPanel.FindControl<StackPanel>("WallpaperPreviewComponentLibraryVisual")!;
+    internal TextBlock WallpaperPreviewComponentLibraryTextBlock => WallpaperSettingsPanel.FindControl<TextBlock>("WallpaperPreviewComponentLibraryTextBlock")!;
+    internal FluentIcons.Avalonia.SymbolIcon WallpaperPreviewSettingsButtonIcon => WallpaperSettingsPanel.FindControl<FluentIcons.Avalonia.SymbolIcon>("WallpaperPreviewSettingsButtonIcon")!;
+    internal Button PickWallpaperButton => WallpaperSettingsPanel.FindControl<Button>("PickWallpaperButton")!;
+    internal Button ClearWallpaperButton => WallpaperSettingsPanel.FindControl<Button>("ClearWallpaperButton")!;
+    internal FluentAvalonia.UI.Controls.SettingsExpander WallpaperPlacementSettingsExpander => WallpaperSettingsPanel.FindControl<FluentAvalonia.UI.Controls.SettingsExpander>("WallpaperPlacementSettingsExpander")!;
+
+    // --- GridSettingsPage ---
+    internal TextBlock GridPanelTitleTextBlock => GridSettingsPanel.FindControl<TextBlock>("GridPanelTitleTextBlock")!;
+    internal Border GridPreviewHost => GridSettingsPanel.FindControl<Border>("GridPreviewHost")!;
+    internal Border GridPreviewFrame => GridSettingsPanel.FindControl<Border>("GridPreviewFrame")!;
+    internal Border GridPreviewViewport => GridSettingsPanel.FindControl<Border>("GridPreviewViewport")!;
+    internal Canvas GridPreviewLinesCanvas => GridSettingsPanel.FindControl<Canvas>("GridPreviewLinesCanvas")!;
+    internal Grid GridPreviewGrid => GridSettingsPanel.FindControl<Grid>("GridPreviewGrid")!;
+    internal Border GridPreviewTopStatusBarHost => GridSettingsPanel.FindControl<Border>("GridPreviewTopStatusBarHost")!;
+    internal StackPanel GridPreviewTopStatusComponentsPanel => GridSettingsPanel.FindControl<StackPanel>("GridPreviewTopStatusComponentsPanel")!;
+    internal Border GridPreviewBottomTaskbarContainer => GridSettingsPanel.FindControl<Border>("GridPreviewBottomTaskbarContainer")!;
+    internal Border GridPreviewTaskbarFixedActionsHost => GridSettingsPanel.FindControl<Border>("GridPreviewTaskbarFixedActionsHost")!;
+    internal StackPanel GridPreviewBackButtonVisual => GridSettingsPanel.FindControl<StackPanel>("GridPreviewBackButtonVisual")!;
+    internal TextBlock GridPreviewBackButtonTextBlock => GridSettingsPanel.FindControl<TextBlock>("GridPreviewBackButtonTextBlock")!;
+    internal StackPanel GridPreviewTaskbarDynamicActionsHost => GridSettingsPanel.FindControl<StackPanel>("GridPreviewTaskbarDynamicActionsHost")!;
+    internal Border GridPreviewTaskbarSettingsActionHost => GridSettingsPanel.FindControl<Border>("GridPreviewTaskbarSettingsActionHost")!;
+    internal StackPanel GridPreviewComponentLibraryVisual => GridSettingsPanel.FindControl<StackPanel>("GridPreviewComponentLibraryVisual")!;
+    internal FluentIcons.Avalonia.FluentIcon GridPreviewComponentLibraryIcon => GridSettingsPanel.FindControl<FluentIcons.Avalonia.FluentIcon>("GridPreviewComponentLibraryIcon")!;
+    internal TextBlock GridPreviewComponentLibraryTextBlock => GridSettingsPanel.FindControl<TextBlock>("GridPreviewComponentLibraryTextBlock")!;
+    internal FluentIcons.Avalonia.SymbolIcon GridPreviewSettingsButtonIcon => GridSettingsPanel.FindControl<FluentIcons.Avalonia.SymbolIcon>("GridPreviewSettingsButtonIcon")!;
+    internal FluentAvalonia.UI.Controls.SettingsExpander GridRowsSettingsExpander => GridSettingsPanel.FindControl<FluentAvalonia.UI.Controls.SettingsExpander>("GridRowsSettingsExpander")!;
+    internal FluentAvalonia.UI.Controls.SettingsExpander GridSpacingSettingsExpander => GridSettingsPanel.FindControl<FluentAvalonia.UI.Controls.SettingsExpander>("GridSpacingSettingsExpander")!;
+    internal FluentAvalonia.UI.Controls.SettingsExpander GridEdgeInsetSettingsExpander => GridSettingsPanel.FindControl<FluentAvalonia.UI.Controls.SettingsExpander>("GridEdgeInsetSettingsExpander")!;
+    internal Slider GridSizeSlider => GridSettingsPanel.FindControl<Slider>("GridSizeSlider")!;
+    internal FluentAvalonia.UI.Controls.NumberBox GridSizeNumberBox => GridSettingsPanel.FindControl<FluentAvalonia.UI.Controls.NumberBox>("GridSizeNumberBox")!;
+    internal ComboBox GridSpacingPresetComboBox => GridSettingsPanel.FindControl<ComboBox>("GridSpacingPresetComboBox")!;
+    internal ComboBoxItem GridSpacingRelaxedComboBoxItem => GridSettingsPanel.FindControl<ComboBoxItem>("GridSpacingRelaxedComboBoxItem")!;
+    internal ComboBoxItem GridSpacingCompactComboBoxItem => GridSettingsPanel.FindControl<ComboBoxItem>("GridSpacingCompactComboBoxItem")!;
+    internal Slider GridEdgeInsetSlider => GridSettingsPanel.FindControl<Slider>("GridEdgeInsetSlider")!;
+    internal FluentAvalonia.UI.Controls.NumberBox GridEdgeInsetNumberBox => GridSettingsPanel.FindControl<FluentAvalonia.UI.Controls.NumberBox>("GridEdgeInsetNumberBox")!;
+    internal TextBlock GridEdgeInsetComputedPxTextBlock => GridSettingsPanel.FindControl<TextBlock>("GridEdgeInsetComputedPxTextBlock")!;
+    internal Button ApplyGridButton => GridSettingsPanel.FindControl<Button>("ApplyGridButton")!;
+    internal TextBlock GridInfoTextBlock => GridSettingsPanel.FindControl<TextBlock>("GridInfoTextBlock")!;
+
+    // --- ColorSettingsPage ---
+    internal TextBlock ColorPanelTitleTextBlock => ColorSettingsPanel.FindControl<TextBlock>("ColorPanelTitleTextBlock")!;
+    internal FluentAvalonia.UI.Controls.SettingsExpander ThemeModeSettingsExpander => ColorSettingsPanel.FindControl<FluentAvalonia.UI.Controls.SettingsExpander>("ThemeModeSettingsExpander")!;
+    internal FluentAvalonia.UI.Controls.SettingsExpander ThemeColorSettingsExpander => ColorSettingsPanel.FindControl<FluentAvalonia.UI.Controls.SettingsExpander>("ThemeColorSettingsExpander")!;
+    internal ToggleSwitch NightModeToggleSwitch => ColorSettingsPanel.FindControl<ToggleSwitch>("NightModeToggleSwitch")!;
+    internal TextBlock ThemeColorStatusTextBlock => ColorSettingsPanel.FindControl<TextBlock>("ThemeColorStatusTextBlock")!;
+    internal TextBlock RecommendedColorsLabelTextBlock => ColorSettingsPanel.FindControl<TextBlock>("RecommendedColorsLabelTextBlock")!;
+    internal TextBlock SystemMonetColorsLabelTextBlock => ColorSettingsPanel.FindControl<TextBlock>("SystemMonetColorsLabelTextBlock")!;
+    internal Button RecommendedColorButton1 => ColorSettingsPanel.FindControl<Button>("RecommendedColorButton1")!;
+    internal Button RecommendedColorButton2 => ColorSettingsPanel.FindControl<Button>("RecommendedColorButton2")!;
+    internal Button RecommendedColorButton3 => ColorSettingsPanel.FindControl<Button>("RecommendedColorButton3")!;
+    internal Button RecommendedColorButton4 => ColorSettingsPanel.FindControl<Button>("RecommendedColorButton4")!;
+    internal Button RecommendedColorButton5 => ColorSettingsPanel.FindControl<Button>("RecommendedColorButton5")!;
+    internal Button RecommendedColorButton6 => ColorSettingsPanel.FindControl<Button>("RecommendedColorButton6")!;
+    internal Border RecommendedColorSwatch1 => ColorSettingsPanel.FindControl<Border>("RecommendedColorSwatch1")!;
+    internal Border RecommendedColorSwatch2 => ColorSettingsPanel.FindControl<Border>("RecommendedColorSwatch2")!;
+    internal Border RecommendedColorSwatch3 => ColorSettingsPanel.FindControl<Border>("RecommendedColorSwatch3")!;
+    internal Border RecommendedColorSwatch4 => ColorSettingsPanel.FindControl<Border>("RecommendedColorSwatch4")!;
+    internal Border RecommendedColorSwatch5 => ColorSettingsPanel.FindControl<Border>("RecommendedColorSwatch5")!;
+    internal Border RecommendedColorSwatch6 => ColorSettingsPanel.FindControl<Border>("RecommendedColorSwatch6")!;
+    internal Button RefreshMonetColorsButton => ColorSettingsPanel.FindControl<Button>("RefreshMonetColorsButton")!;
+    internal Button MonetColorButton1 => ColorSettingsPanel.FindControl<Button>("MonetColorButton1")!;
+    internal Button MonetColorButton2 => ColorSettingsPanel.FindControl<Button>("MonetColorButton2")!;
+    internal Button MonetColorButton3 => ColorSettingsPanel.FindControl<Button>("MonetColorButton3")!;
+    internal Button MonetColorButton4 => ColorSettingsPanel.FindControl<Button>("MonetColorButton4")!;
+    internal Button MonetColorButton5 => ColorSettingsPanel.FindControl<Button>("MonetColorButton5")!;
+    internal Button MonetColorButton6 => ColorSettingsPanel.FindControl<Button>("MonetColorButton6")!;
+    internal Border MonetColorSwatch1 => ColorSettingsPanel.FindControl<Border>("MonetColorSwatch1")!;
+    internal Border MonetColorSwatch2 => ColorSettingsPanel.FindControl<Border>("MonetColorSwatch2")!;
+    internal Border MonetColorSwatch3 => ColorSettingsPanel.FindControl<Border>("MonetColorSwatch3")!;
+    internal Border MonetColorSwatch4 => ColorSettingsPanel.FindControl<Border>("MonetColorSwatch4")!;
+    internal Border MonetColorSwatch5 => ColorSettingsPanel.FindControl<Border>("MonetColorSwatch5")!;
+    internal Border MonetColorSwatch6 => ColorSettingsPanel.FindControl<Border>("MonetColorSwatch6")!;
+
+    // --- StatusBarSettingsPage ---
+    internal TextBlock StatusBarPanelTitleTextBlock => StatusBarSettingsPanel.FindControl<TextBlock>("StatusBarPanelTitleTextBlock")!;
+    internal FluentAvalonia.UI.Controls.SettingsExpander StatusBarClockSettingsExpander => StatusBarSettingsPanel.FindControl<FluentAvalonia.UI.Controls.SettingsExpander>("StatusBarClockSettingsExpander")!;
+    internal FluentAvalonia.UI.Controls.SettingsExpander StatusBarSpacingSettingsExpander => StatusBarSettingsPanel.FindControl<FluentAvalonia.UI.Controls.SettingsExpander>("StatusBarSpacingSettingsExpander")!;
+    internal ToggleSwitch StatusBarClockToggleSwitch => StatusBarSettingsPanel.FindControl<ToggleSwitch>("StatusBarClockToggleSwitch")!;
+    internal RadioButton ClockFormatHMSSRadio => StatusBarSettingsPanel.FindControl<RadioButton>("ClockFormatHMSSRadio")!;
+    internal RadioButton ClockFormatHMRadio => StatusBarSettingsPanel.FindControl<RadioButton>("ClockFormatHMRadio")!;
+    internal ComboBox StatusBarSpacingModeComboBox => StatusBarSettingsPanel.FindControl<ComboBox>("StatusBarSpacingModeComboBox")!;
+    internal ComboBoxItem StatusBarSpacingModeCompactItem => StatusBarSettingsPanel.FindControl<ComboBoxItem>("StatusBarSpacingModeCompactItem")!;
+    internal ComboBoxItem StatusBarSpacingModeRelaxedItem => StatusBarSettingsPanel.FindControl<ComboBoxItem>("StatusBarSpacingModeRelaxedItem")!;
+    internal ComboBoxItem StatusBarSpacingModeCustomItem => StatusBarSettingsPanel.FindControl<ComboBoxItem>("StatusBarSpacingModeCustomItem")!;
+    internal FluentAvalonia.UI.Controls.SettingsExpanderItem StatusBarSpacingCustomPanel => StatusBarSettingsPanel.FindControl<FluentAvalonia.UI.Controls.SettingsExpanderItem>("StatusBarSpacingCustomPanel")!;
+    internal Slider StatusBarSpacingSlider => StatusBarSettingsPanel.FindControl<Slider>("StatusBarSpacingSlider")!;
+    internal FluentAvalonia.UI.Controls.NumberBox StatusBarSpacingNumberBox => StatusBarSettingsPanel.FindControl<FluentAvalonia.UI.Controls.NumberBox>("StatusBarSpacingNumberBox")!;
+    internal TextBlock StatusBarSpacingComputedPxTextBlock => StatusBarSettingsPanel.FindControl<TextBlock>("StatusBarSpacingComputedPxTextBlock")!;
+
+    // --- RegionSettingsPage ---
+    internal TextBlock RegionPanelTitleTextBlock => RegionSettingsPanel.FindControl<TextBlock>("RegionPanelTitleTextBlock")!;
+    internal FluentAvalonia.UI.Controls.SettingsExpander LanguageSettingsExpander => RegionSettingsPanel.FindControl<FluentAvalonia.UI.Controls.SettingsExpander>("LanguageSettingsExpander")!;
+    internal FluentAvalonia.UI.Controls.SettingsExpander TimeZoneSettingsExpander => RegionSettingsPanel.FindControl<FluentAvalonia.UI.Controls.SettingsExpander>("TimeZoneSettingsExpander")!;
+    internal ComboBox LanguageComboBox => RegionSettingsPanel.FindControl<ComboBox>("LanguageComboBox")!;
+    internal ComboBoxItem LanguageChineseItem => RegionSettingsPanel.FindControl<ComboBoxItem>("LanguageChineseItem")!;
+    internal ComboBoxItem LanguageEnglishItem => RegionSettingsPanel.FindControl<ComboBoxItem>("LanguageEnglishItem")!;
+    internal ComboBox TimeZoneComboBox => RegionSettingsPanel.FindControl<ComboBox>("TimeZoneComboBox")!;
+
+    // --- WeatherSettingsPage ---
+    internal TextBlock WeatherPanelTitleTextBlock => WeatherSettingsPanel.FindControl<TextBlock>("WeatherPanelTitleTextBlock")!;
+    internal FluentAvalonia.UI.Controls.SettingsExpander WeatherPreviewSettingsExpander => WeatherSettingsPanel.FindControl<FluentAvalonia.UI.Controls.SettingsExpander>("WeatherPreviewSettingsExpander")!;
+    internal FluentAvalonia.UI.Controls.SettingsExpander WeatherLocationSettingsExpander => WeatherSettingsPanel.FindControl<FluentAvalonia.UI.Controls.SettingsExpander>("WeatherLocationSettingsExpander")!;
+    internal FluentAvalonia.UI.Controls.SettingsExpander WeatherCitySearchSettingsExpander => WeatherSettingsPanel.FindControl<FluentAvalonia.UI.Controls.SettingsExpander>("WeatherCitySearchSettingsExpander")!;
+    internal FluentAvalonia.UI.Controls.SettingsExpander WeatherCoordinateSettingsExpander => WeatherSettingsPanel.FindControl<FluentAvalonia.UI.Controls.SettingsExpander>("WeatherCoordinateSettingsExpander")!;
+    internal FluentAvalonia.UI.Controls.SettingsExpander WeatherAlertFilterSettingsExpander => WeatherSettingsPanel.FindControl<FluentAvalonia.UI.Controls.SettingsExpander>("WeatherAlertFilterSettingsExpander")!;
+    internal FluentAvalonia.UI.Controls.SettingsExpander WeatherIconPackSettingsExpander => WeatherSettingsPanel.FindControl<FluentAvalonia.UI.Controls.SettingsExpander>("WeatherIconPackSettingsExpander")!;
+    internal FluentAvalonia.UI.Controls.SettingsExpander WeatherNoTlsSettingsExpander => WeatherSettingsPanel.FindControl<FluentAvalonia.UI.Controls.SettingsExpander>("WeatherNoTlsSettingsExpander")!;
+    internal Button WeatherPreviewButton => WeatherSettingsPanel.FindControl<Button>("WeatherPreviewButton")!;
+    internal ComboBox WeatherLocationModeComboBox => WeatherSettingsPanel.FindControl<ComboBox>("WeatherLocationModeComboBox")!;
+    internal ComboBoxItem WeatherLocationModeCityItem => WeatherSettingsPanel.FindControl<ComboBoxItem>("WeatherLocationModeCityItem")!;
+    internal ComboBoxItem WeatherLocationModeCoordinatesItem => WeatherSettingsPanel.FindControl<ComboBoxItem>("WeatherLocationModeCoordinatesItem")!;
+    internal ListBoxItem WeatherLocationModeCityChipItem => WeatherSettingsPanel.FindControl<ListBoxItem>("WeatherLocationModeCityChipItem")!;
+    internal ListBoxItem WeatherLocationModeCoordinatesChipItem => WeatherSettingsPanel.FindControl<ListBoxItem>("WeatherLocationModeCoordinatesChipItem")!;
+    internal ListBox WeatherLocationModeChipListBox => WeatherSettingsPanel.FindControl<ListBox>("WeatherLocationModeChipListBox")!;
+    internal ToggleSwitch WeatherAutoRefreshToggleSwitch => WeatherSettingsPanel.FindControl<ToggleSwitch>("WeatherAutoRefreshToggleSwitch")!;
+    internal Button WeatherSearchButton => WeatherSettingsPanel.FindControl<Button>("WeatherSearchButton")!;
+    internal Button WeatherApplyCityButton => WeatherSettingsPanel.FindControl<Button>("WeatherApplyCityButton")!;
+    internal Button WeatherApplyCoordinatesButton => WeatherSettingsPanel.FindControl<Button>("WeatherApplyCoordinatesButton")!;
+    internal TextBox WeatherExcludedAlertsTextBox => WeatherSettingsPanel.FindControl<TextBox>("WeatherExcludedAlertsTextBox")!;
+    internal ComboBox WeatherIconPackComboBox => WeatherSettingsPanel.FindControl<ComboBox>("WeatherIconPackComboBox")!;
+    internal ToggleSwitch WeatherNoTlsToggleSwitch => WeatherSettingsPanel.FindControl<ToggleSwitch>("WeatherNoTlsToggleSwitch")!;
+    internal TextBox WeatherCitySearchTextBox => WeatherSettingsPanel.FindControl<TextBox>("WeatherCitySearchTextBox")!;
+    internal ComboBox WeatherCityResultsComboBox => WeatherSettingsPanel.FindControl<ComboBox>("WeatherCityResultsComboBox")!;
+    internal TextBlock WeatherSearchStatusTextBlock => WeatherSettingsPanel.FindControl<TextBlock>("WeatherSearchStatusTextBlock")!;
+    internal TextBox WeatherLocationKeyTextBox => WeatherSettingsPanel.FindControl<TextBox>("WeatherLocationKeyTextBox")!;
+    internal TextBox WeatherLocationNameTextBox => WeatherSettingsPanel.FindControl<TextBox>("WeatherLocationNameTextBox")!;
+    internal FluentAvalonia.UI.Controls.NumberBox WeatherLatitudeNumberBox => WeatherSettingsPanel.FindControl<FluentAvalonia.UI.Controls.NumberBox>("WeatherLatitudeNumberBox")!;
+    internal FluentAvalonia.UI.Controls.NumberBox WeatherLongitudeNumberBox => WeatherSettingsPanel.FindControl<FluentAvalonia.UI.Controls.NumberBox>("WeatherLongitudeNumberBox")!;
+    internal TextBlock WeatherCoordinateStatusTextBlock => WeatherSettingsPanel.FindControl<TextBlock>("WeatherCoordinateStatusTextBlock")!;
+    internal TextBlock WeatherPreviewResultTextBlock => WeatherSettingsPanel.FindControl<TextBlock>("WeatherPreviewResultTextBlock")!;
+    internal FluentIcons.Avalonia.Fluent.SymbolIcon WeatherPreviewIconSymbol => WeatherSettingsPanel.FindControl<FluentIcons.Avalonia.Fluent.SymbolIcon>("WeatherPreviewIconSymbol")!;
+    internal TextBlock WeatherPreviewTemperatureTextBlock => WeatherSettingsPanel.FindControl<TextBlock>("WeatherPreviewTemperatureTextBlock")!;
+    internal TextBlock WeatherPreviewUpdatedTextBlock => WeatherSettingsPanel.FindControl<TextBlock>("WeatherPreviewUpdatedTextBlock")!;
+    internal FluentAvalonia.UI.Controls.ProgressRing WeatherSearchProgressRing => WeatherSettingsPanel.FindControl<FluentAvalonia.UI.Controls.ProgressRing>("WeatherSearchProgressRing")!;
+    internal FluentAvalonia.UI.Controls.ProgressRing WeatherPreviewProgressRing => WeatherSettingsPanel.FindControl<FluentAvalonia.UI.Controls.ProgressRing>("WeatherPreviewProgressRing")!;
+    internal ComboBoxItem WeatherIconPackFluentRegularItem => WeatherSettingsPanel.FindControl<ComboBoxItem>("WeatherIconPackFluentRegularItem")!;
+    internal ComboBoxItem WeatherIconPackFluentFilledItem => WeatherSettingsPanel.FindControl<ComboBoxItem>("WeatherIconPackFluentFilledItem")!;
+    internal TextBlock WeatherLocationStatusTextBlock => WeatherSettingsPanel.FindControl<TextBlock>("WeatherLocationStatusTextBlock")!;
+
+    // --- UpdateSettingsPage ---
+    internal TextBlock UpdatePanelTitleTextBlock => UpdateSettingsPanel.FindControl<TextBlock>("UpdatePanelTitleTextBlock")!;
+    internal FluentAvalonia.UI.Controls.SettingsExpander UpdateOptionsSettingsExpander => UpdateSettingsPanel.FindControl<FluentAvalonia.UI.Controls.SettingsExpander>("UpdateOptionsSettingsExpander")!;
+    internal FluentAvalonia.UI.Controls.SettingsExpander UpdateActionsSettingsExpander => UpdateSettingsPanel.FindControl<FluentAvalonia.UI.Controls.SettingsExpander>("UpdateActionsSettingsExpander")!;
+    internal TextBlock UpdateCurrentVersionLabelTextBlock => UpdateSettingsPanel.FindControl<TextBlock>("UpdateCurrentVersionLabelTextBlock")!;
+    internal TextBlock UpdateCurrentVersionValueTextBlock => UpdateSettingsPanel.FindControl<TextBlock>("UpdateCurrentVersionValueTextBlock")!;
+    internal TextBlock UpdateLatestVersionLabelTextBlock => UpdateSettingsPanel.FindControl<TextBlock>("UpdateLatestVersionLabelTextBlock")!;
+    internal TextBlock UpdateLatestVersionValueTextBlock => UpdateSettingsPanel.FindControl<TextBlock>("UpdateLatestVersionValueTextBlock")!;
+    internal TextBlock UpdatePublishedAtLabelTextBlock => UpdateSettingsPanel.FindControl<TextBlock>("UpdatePublishedAtLabelTextBlock")!;
+    internal TextBlock UpdatePublishedAtValueTextBlock => UpdateSettingsPanel.FindControl<TextBlock>("UpdatePublishedAtValueTextBlock")!;
+    internal TextBlock UpdateChannelLabelTextBlock => UpdateSettingsPanel.FindControl<TextBlock>("UpdateChannelLabelTextBlock")!;
+    internal ListBoxItem UpdateChannelStableChipItem => UpdateSettingsPanel.FindControl<ListBoxItem>("UpdateChannelStableChipItem")!;
+    internal ListBoxItem UpdateChannelPreviewChipItem => UpdateSettingsPanel.FindControl<ListBoxItem>("UpdateChannelPreviewChipItem")!;
+    internal ToggleSwitch AutoCheckUpdatesToggleSwitch => UpdateSettingsPanel.FindControl<ToggleSwitch>("AutoCheckUpdatesToggleSwitch")! ;
+    internal ListBox UpdateChannelChipListBox => UpdateSettingsPanel.FindControl<ListBox>("UpdateChannelChipListBox")!;
+    internal Button CheckForUpdatesButton => UpdateSettingsPanel.FindControl<Button>("CheckForUpdatesButton")!;
+    internal Button DownloadAndInstallUpdateButton => UpdateSettingsPanel.FindControl<Button>("DownloadAndInstallUpdateButton")!;
+    internal ProgressBar UpdateDownloadProgressBar => UpdateSettingsPanel.FindControl<ProgressBar>("UpdateDownloadProgressBar")!;
+    internal TextBlock UpdateDownloadProgressTextBlock => UpdateSettingsPanel.FindControl<TextBlock>("UpdateDownloadProgressTextBlock")!;
+    internal TextBlock UpdateStatusTextBlock => UpdateSettingsPanel.FindControl<TextBlock>("UpdateStatusTextBlock")!;
+
+    // --- AboutSettingsPage ---
+    internal TextBlock AboutPanelTitleTextBlock => AboutSettingsPanel.FindControl<TextBlock>("AboutPanelTitleTextBlock")!;
+    internal FluentAvalonia.UI.Controls.SettingsExpander AboutStartupSettingsExpander => AboutSettingsPanel.FindControl<FluentAvalonia.UI.Controls.SettingsExpander>("AboutStartupSettingsExpander")!;
+    internal ToggleSwitch AutoStartWithWindowsToggleSwitch => AboutSettingsPanel.FindControl<ToggleSwitch>("AutoStartWithWindowsToggleSwitch")!;
+    internal TextBlock VersionTextBlock => AboutSettingsPanel.FindControl<TextBlock>("VersionTextBlock")!;
+    internal TextBlock CodeNameTextBlock => AboutSettingsPanel.FindControl<TextBlock>("CodeNameTextBlock")!;
+    internal TextBlock FontInfoTextBlock => AboutSettingsPanel.FindControl<TextBlock>("FontInfoTextBlock")!;
+
+    // --- LauncherSettingsPage ---
+    internal TextBlock LauncherSettingsPanelTitleTextBlock => LauncherSettingsPanel.FindControl<TextBlock>("LauncherSettingsPanelTitleTextBlock")!;
+    internal FluentAvalonia.UI.Controls.SettingsExpander LauncherHiddenItemsSettingsExpander => LauncherSettingsPanel.FindControl<FluentAvalonia.UI.Controls.SettingsExpander>("LauncherHiddenItemsSettingsExpander")!;
+    internal StackPanel LauncherHiddenItemsListPanel => LauncherSettingsPanel.FindControl<StackPanel>("LauncherHiddenItemsListPanel")!;
+    internal TextBlock LauncherHiddenItemsEmptyTextBlock => LauncherSettingsPanel.FindControl<TextBlock>("LauncherHiddenItemsEmptyTextBlock")!;
+    internal TextBlock LauncherHiddenItemsDescriptionTextBlock => LauncherSettingsPanel.FindControl<TextBlock>("LauncherHiddenItemsDescriptionTextBlock")!;
+
+    // --- PluginSettingsPage (Added for completeness) ---
+    internal TextBlock PluginSettingsPanelTitleTextBlock => PluginSettingsPanel.FindControl<TextBlock>("PluginSettingsPanelTitleTextBlock")!;
+    internal FluentAvalonia.UI.Controls.SettingsExpander PluginSystemSettingsExpander => PluginSettingsPanel.FindControl<FluentAvalonia.UI.Controls.SettingsExpander>("PluginSystemSettingsExpander")!;
+    internal TextBlock PluginSystemDescriptionTextBlock => PluginSettingsPanel.FindControl<TextBlock>("PluginSystemDescriptionTextBlock")!;
+    internal TextBlock PluginSystemStatusTextBlock => PluginSettingsPanel.FindControl<TextBlock>("PluginSystemStatusTextBlock")!;
 }

LanMountainDesktop/Views/MainWindow.Update.cs

@@ -78,7 +78,7 @@ public partial class MainWindow
 
     private void ApplyUpdateLocalization()
     {
-        SettingsNavUpdateTextBlock.Text = L("settings.nav.update", "Update");
+        SettingsNavUpdateItem.Content = L("settings.nav.update", "Update");
         UpdatePanelTitleTextBlock.Text = L("settings.update.title", "Update");
 
         UpdateCurrentVersionLabelTextBlock.Text = L("settings.update.current_version_label", "Current Version");

LanMountainDesktop/Views/MainWindow.axaml.cs

@@ -176,6 +176,7 @@ public partial class MainWindow : Window
     private bool _isWeatherSearchInProgress;
     private bool _isWeatherPreviewInProgress;
     private ClockDisplayFormat _clockDisplayFormat = ClockDisplayFormat.HourMinuteSecond;
+    private bool _externalSettingsReloadPending;
 
     private double CurrentDesktopPitch => _currentDesktopCellSize + _currentDesktopCellGap;
 
@@ -184,9 +185,68 @@ public partial class MainWindow : Window
         InitializeComponent();
         _componentRuntimeRegistry = DesktopComponentRuntimeRegistry.CreateDefault(_componentRegistry);
         _fluentAvaloniaTheme = Application.Current?.Styles.OfType<FluentAvaloniaTheme>().FirstOrDefault();
+        AppSettingsService.SettingsSaved += OnExternalAppSettingsSaved;
+        LauncherSettingsService.SettingsSaved += OnExternalLauncherSettingsSaved;
         PropertyChanged += OnWindowPropertyChanged;
         InitializeDesktopSurfaceSwipeHandlers();
         InitializeDesktopComponentDragHandlers();
+
+        PickWallpaperButton.Click += OnPickWallpaperClick;
+        ClearWallpaperButton.Click += OnClearWallpaperClick;
+        WallpaperPlacementComboBox.SelectionChanged += OnWallpaperPlacementSelectionChanged;
+
+        GridSizeSlider.ValueChanged += OnGridSizeSliderChanged;
+        GridSpacingPresetComboBox.SelectionChanged += OnGridSpacingPresetSelectionChanged;
+        GridEdgeInsetSlider.ValueChanged += OnGridEdgeInsetSliderChanged;
+        ApplyGridButton.Click += OnApplyGridSizeClick;
+
+        NightModeToggleSwitch.Checked += OnNightModeChecked;
+        NightModeToggleSwitch.Unchecked += OnNightModeUnchecked;
+        RecommendedColorButton1.Click += OnRecommendedColorClick;
+        RecommendedColorButton2.Click += OnRecommendedColorClick;
+        RecommendedColorButton3.Click += OnRecommendedColorClick;
+        RecommendedColorButton4.Click += OnRecommendedColorClick;
+        RecommendedColorButton5.Click += OnRecommendedColorClick;
+        RecommendedColorButton6.Click += OnRecommendedColorClick;
+        RefreshMonetColorsButton.Click += OnRefreshMonetColorsClick;
+        MonetColorButton1.Click += OnMonetColorClick;
+        MonetColorButton2.Click += OnMonetColorClick;
+        MonetColorButton3.Click += OnMonetColorClick;
+        MonetColorButton4.Click += OnMonetColorClick;
+        MonetColorButton5.Click += OnMonetColorClick;
+        MonetColorButton6.Click += OnMonetColorClick;
+
+        StatusBarClockToggleSwitch.Checked += OnStatusBarClockChecked;
+        StatusBarClockToggleSwitch.Unchecked += OnStatusBarClockUnchecked;
+        ClockFormatHMSSRadio.Checked += OnClockFormatChanged;
+        ClockFormatHMRadio.Checked += OnClockFormatChanged;
+        StatusBarSpacingModeComboBox.SelectionChanged += OnStatusBarSpacingModeChanged;
+        StatusBarSpacingSlider.ValueChanged += OnStatusBarSpacingSliderChanged;
+
+        WeatherPreviewButton.Click += OnTestWeatherRequestClick;
+        WeatherLocationModeComboBox.SelectionChanged += OnWeatherLocationModeSelectionChanged;
+        WeatherLocationModeChipListBox.SelectionChanged += OnWeatherLocationModeChipSelectionChanged;
+        WeatherAutoRefreshToggleSwitch.Checked += OnWeatherAutoRefreshToggled;
+        WeatherAutoRefreshToggleSwitch.Unchecked += OnWeatherAutoRefreshToggled;
+        WeatherSearchButton.Click += OnSearchWeatherCityClick;
+        WeatherApplyCityButton.Click += OnApplyWeatherCitySelectionClick;
+        WeatherApplyCoordinatesButton.Click += OnApplyWeatherCoordinatesClick;
+        WeatherExcludedAlertsTextBox.LostFocus += OnWeatherExcludedAlertsLostFocus;
+        WeatherIconPackComboBox.SelectionChanged += OnWeatherIconPackSelectionChanged;
+        WeatherNoTlsToggleSwitch.Checked += OnWeatherNoTlsToggled;
+        WeatherNoTlsToggleSwitch.Unchecked += OnWeatherNoTlsToggled;
+
+        LanguageComboBox.SelectionChanged += OnLanguageSelectionChanged;
+        TimeZoneComboBox.SelectionChanged += OnTimeZoneSelectionChanged;
+
+        AutoCheckUpdatesToggleSwitch.Checked += OnAutoCheckUpdatesToggled;
+        AutoCheckUpdatesToggleSwitch.Unchecked += OnAutoCheckUpdatesToggled;
+        UpdateChannelChipListBox.SelectionChanged += OnUpdateChannelSelectionChanged;
+        CheckForUpdatesButton.Click += OnCheckForUpdatesClick;
+        DownloadAndInstallUpdateButton.Click += OnDownloadAndInstallUpdateClick;
+
+        AutoStartWithWindowsToggleSwitch.Checked += OnAutoStartWithWindowsToggled;
+        AutoStartWithWindowsToggleSwitch.Unchecked += OnAutoStartWithWindowsToggled;
     }
 
     protected override void OnOpened(EventArgs e)
@@ -240,7 +300,10 @@ public partial class MainWindow : Window
         GridSizeSlider.ValueChanged += OnGridSizeSliderChanged;
         GridSizeNumberBox.ValueChanged += OnGridSizeNumberBoxChanged;
 
-        SettingsNavListBox.SelectedIndex = Math.Clamp(snapshot.SettingsTabIndex, 0, 9);
+        if (SettingsNavView.MenuItems.ElementAtOrDefault(Math.Clamp(snapshot.SettingsTabIndex, 0, 9)) is FluentAvalonia.UI.Controls.NavigationViewItem navItem)
+        {
+            SettingsNavView.SelectedItem = navItem;
+        }
         UpdateSettingsTabContent();
 
         WallpaperPlacementComboBox.SelectedIndex = GetPlacementIndexFromSetting(snapshot.WallpaperPlacement);
@@ -313,6 +376,8 @@ public partial class MainWindow : Window
         _releaseUpdateService.Dispose();
         _wallpaperBitmap?.Dispose();
         _wallpaperBitmap = null;
+        AppSettingsService.SettingsSaved -= OnExternalAppSettingsSaved;
+        LauncherSettingsService.SettingsSaved -= OnExternalLauncherSettingsSaved;
         PropertyChanged -= OnWindowPropertyChanged;
         DesktopHost.SizeChanged -= OnDesktopHostSizeChanged;
         WallpaperPreviewHost.SizeChanged -= OnWallpaperPreviewHostSizeChanged;
@@ -1328,6 +1393,7 @@ public partial class MainWindow : Window
         _suppressTimeZoneSelectionEvents = false;
     }
 
+
     private void OnTimeZoneSelectionChanged(object? sender, SelectionChangedEventArgs e)
     {
         if (_suppressTimeZoneSelectionEvents || TimeZoneComboBox.SelectedItem is not ComboBoxItem item)

LanMountainDesktop/Views/SettingsPages/AboutSettingsPage.axaml

@@ -0,0 +1,38 @@
+<UserControl xmlns="https://github.com/avaloniaui"
+             xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
+             xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
+             xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
+             xmlns:ui="using:FluentAvalonia.UI.Controls"
+             xmlns:fi="using:FluentIcons.Avalonia.Fluent"
+             mc:Ignorable="d" d:DesignWidth="800" d:DesignHeight="1000"
+             x:Class="LanMountainDesktop.Views.SettingsPages.AboutSettingsPage">
+
+    <StackPanel x:Name="AboutSettingsPanel" Spacing="20">
+        <TextBlock x:Name="AboutPanelTitleTextBlock" FontSize="24" FontWeight="SemiBold" Foreground="{DynamicResource AdaptiveTextPrimaryBrush}" Text="About" />
+        
+        <Border Background="{DynamicResource AdaptiveSurfaceRaisedBrush}" CornerRadius="{DynamicResource DesignCornerRadiusMd}" Padding="20">
+            <StackPanel Spacing="12">
+                <TextBlock Text="LanMountainDesktop" FontSize="20" FontWeight="SemiBold" Foreground="{DynamicResource AdaptiveTextPrimaryBrush}" />
+                <TextBlock Text="Modern desktop shell experience." FontSize="13" Foreground="{DynamicResource AdaptiveTextSecondaryBrush}" />
+                <Separator Background="{DynamicResource AdaptiveButtonBorderBrush}" Margin="0,8" />
+                <TextBlock x:Name="VersionTextBlock" Text="Version: 1.0.0" FontSize="13" Foreground="{DynamicResource AdaptiveTextPrimaryBrush}" />
+                <TextBlock x:Name="CodeNameTextBlock" Text="Code Name: Administrate" FontSize="13" FontWeight="SemiBold" Foreground="{DynamicResource AdaptiveAccentBrush}" />
+                <TextBlock x:Name="FontInfoTextBlock" Text="Font: MiSans" FontSize="12" Foreground="{DynamicResource AdaptiveTextSecondaryBrush}" />
+            </StackPanel>
+        </Border>
+
+        <Border Classes="settings-expander-shell">
+            <ui:SettingsExpander x:Name="AboutStartupSettingsExpander"
+                                 Header="Windows Startup"
+                                 Description="Launch the app automatically when signing in to Windows."
+                                 IsExpanded="True">
+                <ui:SettingsExpander.IconSource>
+                    <fi:SymbolIconSource Symbol="Window" />
+                </ui:SettingsExpander.IconSource>
+                <ui:SettingsExpander.Footer>
+                    <ToggleSwitch x:Name="AutoStartWithWindowsToggleSwitch" />
+                </ui:SettingsExpander.Footer>
+            </ui:SettingsExpander>
+        </Border>
+    </StackPanel>
+</UserControl>

LanMountainDesktop/Views/SettingsPages/AboutSettingsPage.axaml.cs

@@ -0,0 +1,12 @@
+using Avalonia.Controls;
+using Avalonia.Markup.Xaml;
+
+namespace LanMountainDesktop.Views.SettingsPages;
+
+public partial class AboutSettingsPage : UserControl
+{
+    public AboutSettingsPage()
+    {
+        InitializeComponent();
+    }
+}

LanMountainDesktop/Views/SettingsPages/ColorSettingsPage.axaml

@@ -0,0 +1,204 @@
+<UserControl xmlns="https://github.com/avaloniaui"
+             xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
+             xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
+             xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
+             xmlns:ui="using:FluentAvalonia.UI.Controls"
+             xmlns:fi="using:FluentIcons.Avalonia"
+             xmlns:ic="using:FluentIcons.Avalonia.Fluent"
+             mc:Ignorable="d" d:DesignWidth="800" d:DesignHeight="600"
+             x:Class="LanMountainDesktop.Views.SettingsPages.ColorSettingsPage">
+    <StackPanel x:Name="ColorSettingsPanel"
+                Spacing="16">
+        <TextBlock x:Name="ColorPanelTitleTextBlock"
+                   FontSize="24"
+                   FontWeight="SemiBold"
+                   Foreground="{DynamicResource AdaptiveTextPrimaryBrush}"
+                   Text="Color" />
+
+        <Border Classes="settings-expander-shell">
+            <ui:SettingsExpander x:Name="ThemeModeSettingsExpander"
+                                 Header="&#26085;&#22812;&#27169;&#24335;"
+                                 Description="&#20999;&#25442;&#24212;&#29992;&#30340;&#27973;&#33394;&#25110;&#28145;&#33394;&#20027;&#39064;&#12290;">
+                <ui:SettingsExpander.IconSource>
+
+                </ui:SettingsExpander.IconSource>
+                <ui:SettingsExpander.Footer>
+                    <ToggleSwitch x:Name="NightModeToggleSwitch"
+                                  OffContent="Day"
+                                  OnContent="Night" />
+                </ui:SettingsExpander.Footer>
+            </ui:SettingsExpander>
+        </Border>
+
+        <Border Classes="settings-expander-shell">
+            <ui:SettingsExpander x:Name="ThemeColorSettingsExpander"
+                                 Header="&#20027;&#39064;&#33394;"
+                                 Description="&#36873;&#25321;&#24212;&#29992;&#30340;&#20027;&#39064;&#28857;&#32512;&#33394;&#12290;">
+                <ui:SettingsExpander.IconSource>
+
+                </ui:SettingsExpander.IconSource>
+                
+                <ui:SettingsExpanderItem>
+                    <ui:SettingsExpanderItem.Footer>
+                        <StackPanel Spacing="12">
+                            <TextBlock x:Name="RecommendedColorsLabelTextBlock"
+                                       Foreground="{DynamicResource AdaptiveTextSecondaryBrush}"
+                                       Text="Recommended Colors" />
+                            <WrapPanel ItemWidth="72"
+                                       ItemHeight="56"
+                                       Orientation="Horizontal">
+                                <Button x:Name="RecommendedColorButton1"
+                                        Width="68"
+                                        Height="50"
+                                        Padding="8">
+                                    <Border x:Name="RecommendedColorSwatch1"
+                                            Width="26"
+                                            Height="26"
+                                            CornerRadius="12"
+                                            BorderThickness="0" />
+                                </Button>
+                                <Button x:Name="RecommendedColorButton2"
+                                        Width="68"
+                                        Height="50"
+                                        Padding="8">
+                                    <Border x:Name="RecommendedColorSwatch2"
+                                            Width="26"
+                                            Height="26"
+                                            CornerRadius="12"
+                                            BorderThickness="0" />
+                                </Button>
+                                <Button x:Name="RecommendedColorButton3"
+                                        Width="68"
+                                        Height="50"
+                                        Padding="8">
+                                    <Border x:Name="RecommendedColorSwatch3"
+                                            Width="26"
+                                            Height="26"
+                                            CornerRadius="12"
+                                            BorderThickness="0" />
+                                </Button>
+                                <Button x:Name="RecommendedColorButton4"
+                                        Width="68"
+                                        Height="50"
+                                        Padding="8">
+                                    <Border x:Name="RecommendedColorSwatch4"
+                                            Width="26"
+                                            Height="26"
+                                            CornerRadius="12"
+                                            BorderThickness="0" />
+                                </Button>
+                                <Button x:Name="RecommendedColorButton5"
+                                        Width="68"
+                                        Height="50"
+                                        Padding="8">
+                                    <Border x:Name="RecommendedColorSwatch5"
+                                            Width="26"
+                                            Height="26"
+                                            CornerRadius="12"
+                                            BorderThickness="0" />
+                                </Button>
+                                <Button x:Name="RecommendedColorButton6"
+                                        Width="68"
+                                        Height="50"
+                                        Padding="8">
+                                    <Border x:Name="RecommendedColorSwatch6"
+                                            Width="26"
+                                            Height="26"
+                                            CornerRadius="12"
+                                            BorderThickness="0" />
+                                </Button>
+                            </WrapPanel>
+                        </StackPanel>
+                    </ui:SettingsExpanderItem.Footer>
+                </ui:SettingsExpanderItem>
+
+                <ui:SettingsExpanderItem>
+                    <ui:SettingsExpanderItem.Footer>
+                        <StackPanel Spacing="12">
+                            <Grid ColumnDefinitions="*,Auto"
+                                  ColumnSpacing="10">
+                                <TextBlock x:Name="SystemMonetColorsLabelTextBlock"
+                                           VerticalAlignment="Center"
+                                           Foreground="{DynamicResource AdaptiveTextSecondaryBrush}"
+                                           Text="System Monet Colors" />
+                                <Button x:Name="RefreshMonetColorsButton"
+                                        Grid.Column="1"
+                                        Padding="10,6"
+                                        Content="Refresh" />
+                            </Grid>
+
+                            <WrapPanel ItemWidth="72"
+                                       ItemHeight="56"
+                                       Orientation="Horizontal">
+                                <Button x:Name="MonetColorButton1"
+                                        Width="68"
+                                        Height="50"
+                                        Padding="8">
+                                    <Border x:Name="MonetColorSwatch1"
+                                            Width="26"
+                                            Height="26"
+                                            CornerRadius="12"
+                                            BorderThickness="0" />
+                                </Button>
+                                <Button x:Name="MonetColorButton2"
+                                        Width="68"
+                                        Height="50"
+                                        Padding="8">
+                                    <Border x:Name="MonetColorSwatch2"
+                                            Width="26"
+                                            Height="26"
+                                            CornerRadius="12"
+                                            BorderThickness="0" />
+                                </Button>
+                                <Button x:Name="MonetColorButton3"
+                                        Width="68"
+                                        Height="50"
+                                        Padding="8">
+                                    <Border x:Name="MonetColorSwatch3"
+                                            Width="26"
+                                            Height="26"
+                                            CornerRadius="12"
+                                            BorderThickness="0" />
+                                </Button>
+                                <Button x:Name="MonetColorButton4"
+                                        Width="68"
+                                        Height="50"
+                                        Padding="8">
+                                    <Border x:Name="MonetColorSwatch4"
+                                            Width="26"
+                                            Height="26"
+                                            CornerRadius="12"
+                                            BorderThickness="0" />
+                                </Button>
+                                <Button x:Name="MonetColorButton5"
+                                        Width="68"
+                                        Height="50"
+                                        Padding="8">
+                                    <Border x:Name="MonetColorSwatch5"
+                                            Width="26"
+                                            Height="26"
+                                            CornerRadius="12"
+                                            BorderThickness="0" />
+                                </Button>
+                                <Button x:Name="MonetColorButton6"
+                                        Width="68"
+                                        Height="50"
+                                        Padding="8">
+                                    <Border x:Name="MonetColorSwatch6"
+                                            Width="26"
+                                            Height="26"
+                                            CornerRadius="12"
+                                            BorderThickness="0" />
+                                </Button>
+                            </WrapPanel>
+                        </StackPanel>
+                    </ui:SettingsExpanderItem.Footer>
+                </ui:SettingsExpanderItem>
+            </ui:SettingsExpander>
+        </Border>
+
+        <TextBlock x:Name="ThemeColorStatusTextBlock"
+                   Foreground="{DynamicResource AdaptiveTextMutedBrush}"
+                   Text="Theme color is ready." />
+    </StackPanel>
+</UserControl>

LanMountainDesktop/Views/SettingsPages/ColorSettingsPage.axaml.cs

@@ -0,0 +1,12 @@
+using Avalonia.Controls;
+using Avalonia.Markup.Xaml;
+
+namespace LanMountainDesktop.Views.SettingsPages;
+
+public partial class ColorSettingsPage : UserControl
+{
+    public ColorSettingsPage()
+    {
+        InitializeComponent();
+    }
+}

LanMountainDesktop/Views/SettingsPages/GridSettingsPage.axaml

@@ -0,0 +1,172 @@
+<UserControl xmlns="https://github.com/avaloniaui"
+             xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
+             xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
+             xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
+             xmlns:ui="using:FluentAvalonia.UI.Controls"
+             xmlns:fi="using:FluentIcons.Avalonia"
+             xmlns:ic="using:FluentIcons.Avalonia.Fluent"
+             xmlns:comp="using:LanMountainDesktop.Views.Components"
+             mc:Ignorable="d" d:DesignWidth="800" d:DesignHeight="600"
+             x:Class="LanMountainDesktop.Views.SettingsPages.GridSettingsPage">
+    <Grid x:Name="GridSettingsPanel"
+          ColumnDefinitions="*, *"
+          RowDefinitions="Auto, *">
+        <TextBlock x:Name="GridPanelTitleTextBlock"
+                   Grid.Row="0" Grid.Column="0" Grid.ColumnSpan="2"
+                   FontSize="28"
+                   FontWeight="SemiBold"
+                   Foreground="{DynamicResource AdaptiveTextPrimaryBrush}"
+                   Margin="0,0,0,24"
+                   Text="调整网格布局" />
+
+        <!-- Left Column: Grid Preview -->
+        <Border x:Name="GridPreviewHost"
+                Grid.Row="1" Grid.Column="0"
+                Margin="0,0,16,0"
+                VerticalAlignment="Top"
+                HorizontalAlignment="Stretch">
+            <Border x:Name="GridPreviewFrame"
+                    HorizontalAlignment="Stretch"
+                    CornerRadius="28"
+                    Background="#FF1A1A1A"
+                    Padding="12">
+                <Border x:Name="GridPreviewViewport"
+                        ClipToBounds="True"
+                        CornerRadius="16"
+                        Background="#30111827">
+                    <Panel>
+                        <Canvas x:Name="GridPreviewLinesCanvas"
+                                HorizontalAlignment="Center"
+                                VerticalAlignment="Center"
+                                IsHitTestVisible="False" />
+                        <Grid x:Name="GridPreviewGrid"
+                              HorizontalAlignment="Center"
+                              VerticalAlignment="Center">
+                            <Border x:Name="GridPreviewTopStatusBarHost"
+                                Grid.Row="0"
+                                Background="Transparent"
+                                Padding="2">
+                            <StackPanel x:Name="GridPreviewTopStatusComponentsPanel"
+                                        Orientation="Horizontal"
+                                        Spacing="3">
+                            </StackPanel>
+                        </Border>
+
+                        <Border x:Name="GridPreviewBottomTaskbarContainer"
+                                Classes="glass-strong"
+                                Grid.Row="1"
+                                Margin="3"
+                                CornerRadius="16"
+                                Padding="2">
+                            <Grid ColumnDefinitions="Auto,*,Auto"
+                                  ColumnSpacing="3">
+                                <Border x:Name="GridPreviewTaskbarFixedActionsHost" Grid.Column="0">
+                                    <StackPanel x:Name="GridPreviewBackButtonVisual" Orientation="Horizontal" Spacing="3">
+                                        <fi:SymbolIcon Classes="icon-s" Symbol="Window" />
+                                        <TextBlock x:Name="GridPreviewBackButtonTextBlock" Text="回到Windows" VerticalAlignment="Center" />
+                                    </StackPanel>
+                                </Border>
+                                <StackPanel x:Name="GridPreviewTaskbarDynamicActionsHost"
+                                            Grid.Column="1"
+                                            Orientation="Horizontal"
+                                            HorizontalAlignment="Center"
+                                            Spacing="3" />
+                                <Border x:Name="GridPreviewTaskbarSettingsActionHost" Grid.Column="2">
+                                    <StackPanel Orientation="Horizontal" Spacing="3">
+                                        <StackPanel x:Name="GridPreviewComponentLibraryVisual" IsVisible="False" Orientation="Horizontal" Spacing="3">
+                                            <fi:FluentIcon x:Name="GridPreviewComponentLibraryIcon" Classes="icon-s" Icon="Apps" />
+                                            <TextBlock x:Name="GridPreviewComponentLibraryTextBlock" Text="Widget library" VerticalAlignment="Center" />
+                                        </StackPanel>
+                                        <fi:SymbolIcon x:Name="GridPreviewSettingsButtonIcon" Classes="icon-s" Symbol="Settings" />
+                                    </StackPanel>
+                                </Border>
+                            </Grid>
+                        </Border>
+                    </Grid>
+                    </Panel>
+                </Border>
+            </Border>
+        </Border>
+
+        <!-- Right Column: Settings Content -->
+        <StackPanel Grid.Row="1" Grid.Column="1"
+                    Margin="16,0,0,0"
+                    Spacing="16">
+            
+            <Border Classes="settings-expander-shell">
+                <ui:SettingsExpander x:Name="GridRowsSettingsExpander" Header="Rows" Description="Adjust the density of the grid">
+                    <ui:SettingsExpander.Footer>
+                        <Grid ColumnDefinitions="*,Auto" ColumnSpacing="12" Width="220">
+                            <Slider x:Name="GridSizeSlider"
+                                    Grid.Column="0"
+                                    Minimum="6"
+                                    Maximum="96"
+                                    TickFrequency="1"
+                                    TickPlacement="None"
+                                    Value="12" />
+                            <ui:NumberBox x:Name="GridSizeNumberBox"
+                                          Grid.Column="1"
+                                          Width="80"
+                                          Minimum="6"
+                                          Maximum="96"
+                                          Foreground="{DynamicResource AdaptiveTextPrimaryBrush}"
+                                          Value="12" />
+                        </Grid>
+                    </ui:SettingsExpander.Footer>
+                </ui:SettingsExpander>
+            </Border>
+
+            <Border Classes="settings-expander-shell">
+                <ui:SettingsExpander x:Name="GridSpacingSettingsExpander" Header="Spacing" Description="Adjust the gap between cells">
+                    <ui:SettingsExpander.Footer>
+                        <ComboBox x:Name="GridSpacingPresetComboBox"
+                                  Width="120">
+                            <ComboBoxItem x:Name="GridSpacingRelaxedComboBoxItem" Tag="Relaxed" Content="Relaxed" />
+                            <ComboBoxItem x:Name="GridSpacingCompactComboBoxItem" Tag="Compact" Content="Compact" />
+                        </ComboBox>
+                    </ui:SettingsExpander.Footer>
+                </ui:SettingsExpander>
+            </Border>
+
+            <Border Classes="settings-expander-shell">
+                <ui:SettingsExpander x:Name="GridEdgeInsetSettingsExpander" Header="Screen Inset" Description="Adjust margins around the desktop">
+                    <ui:SettingsExpander.Footer>
+                        <Grid ColumnDefinitions="*,Auto" ColumnSpacing="12" Width="220">
+                            <Slider x:Name="GridEdgeInsetSlider"
+                                    Grid.Column="0"
+                                    Minimum="0"
+                                    Maximum="30"
+                                    TickFrequency="1"
+                                    TickPlacement="None"
+                                    Value="18" />
+                            <ui:NumberBox x:Name="GridEdgeInsetNumberBox"
+                                          Grid.Column="1"
+                                          Width="80"
+                                          Minimum="0"
+                                          Maximum="30"
+                                          Foreground="{DynamicResource AdaptiveTextPrimaryBrush}"
+                                          Value="18" />
+                        </Grid>
+                    </ui:SettingsExpander.Footer>
+                    <ui:SettingsExpanderItem>
+                        <ui:SettingsExpanderItem.Footer>
+                            <TextBlock x:Name="GridEdgeInsetComputedPxTextBlock"
+                                       Foreground="{DynamicResource AdaptiveTextSecondaryBrush}"
+                                       Text=">= 0 px" />
+                        </ui:SettingsExpanderItem.Footer>
+                    </ui:SettingsExpanderItem>
+                </ui:SettingsExpander>
+            </Border>
+
+            <Button x:Name="ApplyGridButton"
+                    HorizontalAlignment="Stretch"
+                    Padding="0,10"
+                    Foreground="{DynamicResource AdaptiveTextPrimaryBrush}"
+                    Content="应用" />
+
+            <TextBlock x:Name="GridInfoTextBlock"
+                       Foreground="{DynamicResource AdaptiveTextSecondaryBrush}"
+                       Text="Grid: - cols x - rows (1:1)" />
+        </StackPanel>
+    </Grid>
+</UserControl>

LanMountainDesktop/Views/SettingsPages/GridSettingsPage.axaml.cs

@@ -0,0 +1,12 @@
+using Avalonia.Controls;
+using Avalonia.Markup.Xaml;
+
+namespace LanMountainDesktop.Views.SettingsPages;
+
+public partial class GridSettingsPage : UserControl
+{
+    public GridSettingsPage()
+    {
+        InitializeComponent();
+    }
+}

LanMountainDesktop/Views/SettingsPages/LauncherSettingsPage.axaml

@@ -0,0 +1,45 @@
+<UserControl xmlns="https://github.com/avaloniaui"
+             xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
+             xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
+             xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
+             xmlns:ui="using:FluentAvalonia.UI.Controls"
+             xmlns:fi="using:FluentIcons.Avalonia.Fluent"
+             mc:Ignorable="d" d:DesignWidth="800" d:DesignHeight="1000"
+             x:Class="LanMountainDesktop.Views.SettingsPages.LauncherSettingsPage">
+
+    <StackPanel x:Name="LauncherSettingsPanel" Spacing="16">
+        <TextBlock x:Name="LauncherSettingsPanelTitleTextBlock"
+                   FontSize="24"
+                   FontWeight="SemiBold"
+                   Foreground="{DynamicResource AdaptiveTextPrimaryBrush}"
+                   Text="App Launcher" />
+
+        <Border Classes="settings-expander-shell">
+            <ui:SettingsExpander x:Name="LauncherHiddenItemsSettingsExpander"
+                                 Header="Hidden Items"
+                                 Description="Review hidden launcher entries and show them again."
+                                 IsExpanded="True">
+                <ui:SettingsExpander.IconSource>
+                    <ui:FontIconSource Glyph="&#xe71e;" FontFamily="{StaticResource SymbolThemeFontFamily}" />
+                </ui:SettingsExpander.IconSource>
+                <ui:SettingsExpander.Footer>
+                    <StackPanel Spacing="10">
+                        <TextBlock x:Name="LauncherHiddenItemsDescriptionTextBlock"
+                                   Foreground="{DynamicResource AdaptiveTextSecondaryBrush}"
+                                   Text="Right-click an icon in launcher to hide it. Hidden entries appear here." />
+                        <TextBlock x:Name="LauncherHiddenItemsEmptyTextBlock"
+                                   IsVisible="False"
+                                   Foreground="{DynamicResource AdaptiveTextSecondaryBrush}"
+                                   Text="No hidden items." />
+                        <ScrollViewer MaxHeight="420"
+                                      VerticalScrollBarVisibility="Auto"
+                                      HorizontalScrollBarVisibility="Disabled">
+                            <StackPanel x:Name="LauncherHiddenItemsListPanel"
+                                        Spacing="8" />
+                        </ScrollViewer>
+                    </StackPanel>
+                </ui:SettingsExpander.Footer>
+            </ui:SettingsExpander>
+        </Border>
+    </StackPanel>
+</UserControl>

LanMountainDesktop/Views/SettingsPages/LauncherSettingsPage.axaml.cs

@@ -0,0 +1,12 @@
+using Avalonia.Controls;
+using Avalonia.Markup.Xaml;
+
+namespace LanMountainDesktop.Views.SettingsPages;
+
+public partial class LauncherSettingsPage : UserControl
+{
+    public LauncherSettingsPage()
+    {
+        InitializeComponent();
+    }
+}

LanMountainDesktop/Views/SettingsPages/PluginSettingsPage.axaml

@@ -0,0 +1,43 @@
+<UserControl xmlns="https://github.com/avaloniaui"
+             xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
+             xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
+             xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
+             xmlns:ui="using:FluentAvalonia.UI.Controls"
+             xmlns:fi="using:FluentIcons.Avalonia.Fluent"
+             mc:Ignorable="d" d:DesignWidth="800" d:DesignHeight="1000"
+             x:Class="LanMountainDesktop.Views.SettingsPages.PluginSettingsPage">
+
+    <StackPanel x:Name="PluginSettingsPanel" Spacing="16">
+        <TextBlock x:Name="PluginSettingsPanelTitleTextBlock"
+                   FontSize="24"
+                   FontWeight="SemiBold"
+                   Foreground="{DynamicResource AdaptiveTextPrimaryBrush}"
+                   Text="Plugins" />
+
+        <Border Classes="settings-expander-shell">
+            <ui:SettingsExpander x:Name="PluginSystemSettingsExpander"
+                                 Header="Plugin Runtime"
+                                 Description="Manage plugin loading and backend isolation."
+                                 IsExpanded="True">
+                <ui:SettingsExpander.IconSource>
+                    <ui:FontIconSource Glyph="&#xe734;" FontFamily="{StaticResource SymbolThemeFontFamily}" />
+                </ui:SettingsExpander.IconSource>
+                <ui:SettingsExpander.Footer>
+                    <StackPanel Spacing="10">
+                        <TextBlock x:Name="PluginSystemDescriptionTextBlock"
+                                   Foreground="{DynamicResource AdaptiveTextSecondaryBrush}"
+                                   Text="This page will host installed plugin management, permission review, and sandboxed backend runtime controls." />
+                        <Border Background="{DynamicResource AdaptiveSurfaceRaisedBrush}"
+                                CornerRadius="{DynamicResource DesignCornerRadiusSm}"
+                                Padding="14">
+                            <TextBlock x:Name="PluginSystemStatusTextBlock"
+                                       Foreground="{DynamicResource AdaptiveTextSecondaryBrush}"
+                                       TextWrapping="Wrap"
+                                       Text="Plugin management UI is not connected yet. Next step is wiring the loader, permissions, and worker isolation state into this panel." />
+                        </Border>
+                    </StackPanel>
+                </ui:SettingsExpander.Footer>
+            </ui:SettingsExpander>
+        </Border>
+    </StackPanel>
+</UserControl>

LanMountainDesktop/Views/SettingsPages/PluginSettingsPage.axaml.cs

@@ -0,0 +1,12 @@
+using Avalonia.Controls;
+using Avalonia.Markup.Xaml;
+
+namespace LanMountainDesktop.Views.SettingsPages;
+
+public partial class PluginSettingsPage : UserControl
+{
+    public PluginSettingsPage()
+    {
+        InitializeComponent();
+    }
+}

LanMountainDesktop/Views/SettingsPages/RegionSettingsPage.axaml

@@ -0,0 +1,49 @@
+<UserControl xmlns="https://github.com/avaloniaui"
+             xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
+             xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
+             xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
+             xmlns:ui="using:FluentAvalonia.UI.Controls"
+             xmlns:fi="using:FluentIcons.Avalonia.Fluent"
+             mc:Ignorable="d" d:DesignWidth="800" d:DesignHeight="600"
+             x:Class="LanMountainDesktop.Views.SettingsPages.RegionSettingsPage">
+
+    <StackPanel x:Name="RegionSettingsPanel"
+                Spacing="16">
+        <TextBlock x:Name="RegionPanelTitleTextBlock"
+                   FontSize="24"
+                   FontWeight="SemiBold"
+                   Foreground="{DynamicResource AdaptiveTextPrimaryBrush}"
+                   Text="Region" />
+
+        <Border Classes="settings-expander-shell">
+            <ui:SettingsExpander x:Name="LanguageSettingsExpander"
+                                 Header="Language"
+                                 Description="Select application language. Changes apply immediately.">
+                <ui:SettingsExpander.IconSource>
+                    <fi:SymbolIconSource Symbol="Translate" />
+                </ui:SettingsExpander.IconSource>
+                <ui:SettingsExpander.Footer>
+                    <ComboBox x:Name="LanguageComboBox"
+                              Width="220">
+                        <ComboBoxItem x:Name="LanguageChineseItem" Tag="zh-CN" Content="中文" />
+                        <ComboBoxItem x:Name="LanguageEnglishItem" Tag="en-US" Content="English" />
+                    </ComboBox>
+                </ui:SettingsExpander.Footer>
+            </ui:SettingsExpander>
+        </Border>
+
+        <Border Classes="settings-expander-shell">
+            <ui:SettingsExpander x:Name="TimeZoneSettingsExpander"
+                                 Header="Time Zone"
+                                 Description="Select a time zone. Clock and calendar widgets will follow this zone.">
+                <ui:SettingsExpander.IconSource>
+                    <fi:SymbolIconSource Symbol="Clock" />
+                </ui:SettingsExpander.IconSource>
+                <ui:SettingsExpander.Footer>
+                    <ComboBox x:Name="TimeZoneComboBox"
+                              Width="280" />
+                </ui:SettingsExpander.Footer>
+            </ui:SettingsExpander>
+        </Border>
+    </StackPanel>
+</UserControl>

LanMountainDesktop/Views/SettingsPages/RegionSettingsPage.axaml.cs

@@ -0,0 +1,12 @@
+using Avalonia.Controls;
+using Avalonia.Markup.Xaml;
+
+namespace LanMountainDesktop.Views.SettingsPages;
+
+public partial class RegionSettingsPage : UserControl
+{
+    public RegionSettingsPage()
+    {
+        InitializeComponent();
+    }
+}

LanMountainDesktop/Views/SettingsPages/StatusBarSettingsPage.axaml

@@ -0,0 +1,90 @@
+<UserControl xmlns="https://github.com/avaloniaui"
+             xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
+             xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
+             xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
+             xmlns:ui="using:FluentAvalonia.UI.Controls"
+             xmlns:fi="using:FluentIcons.Avalonia"
+             mc:Ignorable="d" d:DesignWidth="800" d:DesignHeight="600"
+             x:Class="LanMountainDesktop.Views.SettingsPages.StatusBarSettingsPage">
+    <StackPanel x:Name="StatusBarSettingsPanel"
+                Spacing="16">
+        <TextBlock x:Name="StatusBarPanelTitleTextBlock"
+                   FontSize="24"
+                   FontWeight="SemiBold"
+                   Foreground="{DynamicResource AdaptiveTextPrimaryBrush}"
+                   Text="Status Bar" />
+
+        <Border Classes="settings-expander-shell">
+            <ui:SettingsExpander x:Name="StatusBarClockSettingsExpander"
+                                 Header="&#31995;&#32479;&#26102;&#38047;"
+                                 Description="&#22312;&#29366;&#24577;&#26639;&#19978;&#26174;&#31034;&#26102;&#38388;&#12290;"
+                                 IsExpanded="False">
+                <ui:SettingsExpander.Footer>
+                    <ToggleSwitch x:Name="StatusBarClockToggleSwitch"
+                                  OnContent="On"
+                                  OffContent="Off" />
+                </ui:SettingsExpander.Footer>
+                
+                <ui:SettingsExpanderItem Content="Display Format">
+                    <ui:SettingsExpanderItem.Footer>
+                        <StackPanel Orientation="Horizontal" Spacing="16">
+                            <RadioButton x:Name="ClockFormatHMSSRadio"
+                                         Content="HH:mm:ss"
+                                         GroupName="ClockFormat"
+                                         Tag="Hms" />
+                            <RadioButton x:Name="ClockFormatHMRadio"
+                                         Content="HH:mm"
+                                         GroupName="ClockFormat"
+                                         Tag="Hm" />
+                        </StackPanel>
+                    </ui:SettingsExpanderItem.Footer>
+                </ui:SettingsExpanderItem>
+            </ui:SettingsExpander>
+        </Border>
+
+        <Border Classes="settings-expander-shell">
+            <ui:SettingsExpander x:Name="StatusBarSpacingSettingsExpander"
+                                 Header="Component spacing"
+                                 Description="Adjust spacing between status bar components."
+                                 IsExpanded="False">
+                <ui:SettingsExpander.Footer>
+                    <ComboBox x:Name="StatusBarSpacingModeComboBox"
+                              Width="150">
+                        <ComboBoxItem x:Name="StatusBarSpacingModeCompactItem" Tag="Compact" Content="Compact" />
+                        <ComboBoxItem x:Name="StatusBarSpacingModeRelaxedItem" Tag="Relaxed" Content="Relaxed" />
+                        <ComboBoxItem x:Name="StatusBarSpacingModeCustomItem" Tag="Custom" Content="Custom" />
+                    </ComboBox>
+                </ui:SettingsExpander.Footer>
+
+                <ui:SettingsExpanderItem x:Name="StatusBarSpacingCustomPanel"
+                                         Content="Custom spacing"
+                                        IsVisible="False">
+                     <ui:SettingsExpanderItem.Footer>
+                        <StackPanel Orientation="Horizontal" Spacing="12">
+                            <Slider x:Name="StatusBarSpacingSlider"
+                                    Width="150"
+                                    Minimum="0"
+                                    Maximum="30"
+                                    TickFrequency="1"
+                                    Value="12" />
+                             <ui:NumberBox x:Name="StatusBarSpacingNumberBox"
+                                           Width="80"
+                                           Minimum="0"
+                                           Maximum="30"
+                                           Value="12" />
+                        </StackPanel>
+                     </ui:SettingsExpanderItem.Footer>
+                </ui:SettingsExpanderItem>
+                
+                <ui:SettingsExpanderItem>
+                    <ui:SettingsExpanderItem.Footer>
+                        <TextBlock x:Name="StatusBarSpacingComputedPxTextBlock"
+                                   HorizontalAlignment="Right"
+                                   Foreground="{DynamicResource AdaptiveTextSecondaryBrush}"
+                                   Text=">= 0 px" />
+                    </ui:SettingsExpanderItem.Footer>
+                </ui:SettingsExpanderItem>
+            </ui:SettingsExpander>
+        </Border>
+    </StackPanel>
+</UserControl>

LanMountainDesktop/Views/SettingsPages/StatusBarSettingsPage.axaml.cs

@@ -0,0 +1,12 @@
+using Avalonia.Controls;
+using Avalonia.Markup.Xaml;
+
+namespace LanMountainDesktop.Views.SettingsPages;
+
+public partial class StatusBarSettingsPage : UserControl
+{
+    public StatusBarSettingsPage()
+    {
+        InitializeComponent();
+    }
+}

LanMountainDesktop/Views/SettingsPages/UpdateSettingsPage.axaml

@@ -0,0 +1,122 @@
+<UserControl xmlns="https://github.com/avaloniaui"
+             xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
+             xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
+             xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
+             xmlns:ui="using:FluentAvalonia.UI.Controls"
+             xmlns:fi="using:FluentIcons.Avalonia.Fluent"
+             mc:Ignorable="d" d:DesignWidth="800" d:DesignHeight="1000"
+             x:Class="LanMountainDesktop.Views.SettingsPages.UpdateSettingsPage">
+
+    <StackPanel x:Name="UpdateSettingsPanel"
+                Spacing="16">
+        <TextBlock x:Name="UpdatePanelTitleTextBlock"
+                   FontSize="24"
+                   FontWeight="SemiBold"
+                   Foreground="{DynamicResource AdaptiveTextPrimaryBrush}"
+                   Text="Update" />
+
+        <Border Background="{DynamicResource AdaptiveSurfaceRaisedBrush}"
+                CornerRadius="{DynamicResource DesignCornerRadiusMd}"
+                Padding="20">
+            <Grid ColumnDefinitions="Auto,*" RowDefinitions="Auto,Auto,Auto" ColumnSpacing="12" RowSpacing="8">
+                <TextBlock x:Name="UpdateCurrentVersionLabelTextBlock"
+                           Text="Current Version"
+                           FontWeight="SemiBold"
+                           Foreground="{DynamicResource AdaptiveTextSecondaryBrush}" />
+                <TextBlock x:Name="UpdateCurrentVersionValueTextBlock"
+                           Grid.Column="1"
+                           Text="-"
+                           Foreground="{DynamicResource AdaptiveTextPrimaryBrush}" />
+
+                <TextBlock x:Name="UpdateLatestVersionLabelTextBlock"
+                           Grid.Row="1"
+                           Text="Latest Release"
+                           FontWeight="SemiBold"
+                           Foreground="{DynamicResource AdaptiveTextSecondaryBrush}" />
+                <TextBlock x:Name="UpdateLatestVersionValueTextBlock"
+                           Grid.Row="1" Grid.Column="1"
+                           Text="-"
+                           Foreground="{DynamicResource AdaptiveTextPrimaryBrush}" />
+
+                <TextBlock x:Name="UpdatePublishedAtLabelTextBlock"
+                           Grid.Row="2"
+                           Text="Published At"
+                           FontWeight="SemiBold"
+                           Foreground="{DynamicResource AdaptiveTextSecondaryBrush}" />
+                <TextBlock x:Name="UpdatePublishedAtValueTextBlock"
+                           Grid.Row="2" Grid.Column="1"
+                           Text="-"
+                           Foreground="{DynamicResource AdaptiveTextPrimaryBrush}" />
+            </Grid>
+        </Border>
+
+        <Border Classes="settings-expander-shell">
+            <ui:SettingsExpander x:Name="UpdateOptionsSettingsExpander"
+                                 Header="Update Options"
+                                 Description="Configure update checks and release channel."
+                                 IsExpanded="True">
+                <ui:SettingsExpander.IconSource>
+                    <fi:SymbolIconSource Symbol="Settings" />
+                </ui:SettingsExpander.IconSource>
+                <ui:SettingsExpander.Footer>
+                    <StackPanel Spacing="10">
+                        <ToggleSwitch x:Name="AutoCheckUpdatesToggleSwitch"
+                                      Content="Automatically check for updates on startup" />
+                        <TextBlock x:Name="UpdateChannelLabelTextBlock"
+                                   Text="Update Channel"
+                                   FontWeight="SemiBold"
+                                   Foreground="{DynamicResource AdaptiveTextSecondaryBrush}" />
+                        <ListBox x:Name="UpdateChannelChipListBox"
+                                 Classes="settings-chip-list">
+                            <ListBox.ItemsPanel>
+                                <ItemsPanelTemplate>
+                                    <StackPanel Orientation="Horizontal" Spacing="8" />
+                                </ItemsPanelTemplate>
+                            </ListBox.ItemsPanel>
+                            <ListBoxItem x:Name="UpdateChannelStableChipItem"
+                                         Tag="Stable"
+                                         Content="Stable" />
+                            <ListBoxItem x:Name="UpdateChannelPreviewChipItem"
+                                         Tag="Preview"
+                                         Content="Preview" />
+                        </ListBox>
+                    </StackPanel>
+                </ui:SettingsExpander.Footer>
+            </ui:SettingsExpander>
+        </Border>
+
+        <Border Classes="settings-expander-shell">
+            <ui:SettingsExpander x:Name="UpdateActionsSettingsExpander"
+                                 Header="Update Actions"
+                                 Description="Check releases, download installer, and start update."
+                                 IsExpanded="True">
+                <ui:SettingsExpander.IconSource>
+                    <fi:SymbolIconSource Symbol="ArrowSync" />
+                </ui:SettingsExpander.IconSource>
+                <ui:SettingsExpander.Footer>
+                    <StackPanel Spacing="10">
+                        <StackPanel Orientation="Horizontal" Spacing="10">
+                            <Button x:Name="CheckForUpdatesButton"
+                                    MinWidth="140"
+                                    Content="Check for Updates" />
+                            <Button x:Name="DownloadAndInstallUpdateButton"
+                                    MinWidth="180"
+                                    Content="Download &amp; Install" />
+                        </StackPanel>
+                        <ProgressBar x:Name="UpdateDownloadProgressBar"
+                                     Minimum="0"
+                                     Maximum="100"
+                                     Height="6"
+                                     IsVisible="False" />
+                        <TextBlock x:Name="UpdateDownloadProgressTextBlock"
+                                   Text="Download progress: -"
+                                   Foreground="{DynamicResource AdaptiveTextSecondaryBrush}" />
+                        <TextBlock x:Name="UpdateStatusTextBlock"
+                                   Text="Ready to check for updates."
+                                   Foreground="{DynamicResource AdaptiveTextPrimaryBrush}" />
+                    </StackPanel>
+                </ui:SettingsExpander.Footer>
+            </ui:SettingsExpander>
+        </Border>
+    </StackPanel>
+</UserControl>

LanMountainDesktop/Views/SettingsPages/UpdateSettingsPage.axaml.cs

@@ -0,0 +1,12 @@
+using Avalonia.Controls;
+using Avalonia.Markup.Xaml;
+
+namespace LanMountainDesktop.Views.SettingsPages;
+
+public partial class UpdateSettingsPage : UserControl
+{
+    public UpdateSettingsPage()
+    {
+        InitializeComponent();
+    }
+}

LanMountainDesktop/Views/SettingsPages/WallpaperSettingsPage.axaml

@@ -0,0 +1,151 @@
+<UserControl xmlns="https://github.com/avaloniaui"
+             xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
+             xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
+             xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
+             xmlns:ui="using:FluentAvalonia.UI.Controls"
+             xmlns:fi="using:FluentIcons.Avalonia"
+             xmlns:ic="using:FluentIcons.Avalonia.Fluent"
+             xmlns:comp="using:LanMountainDesktop.Views.Components"
+             xmlns:vlc="clr-namespace:LibVLCSharp.Avalonia;assembly=LibVLCSharp.Avalonia"
+             mc:Ignorable="d" d:DesignWidth="800" d:DesignHeight="600"
+             x:Class="LanMountainDesktop.Views.SettingsPages.WallpaperSettingsPage">
+    <Grid x:Name="WallpaperSettingsPanel"
+          ColumnDefinitions="*, *"
+          RowDefinitions="Auto, *">
+        <TextBlock x:Name="WallpaperPanelTitleTextBlock"
+                   Grid.Row="0" Grid.Column="0" Grid.ColumnSpan="2"
+                   FontSize="28"
+                   FontWeight="SemiBold"
+                   Foreground="{DynamicResource AdaptiveTextPrimaryBrush}"
+                   Margin="0,0,0,24"
+                   Text="Personalize Wallpaper" />
+
+        <!-- Left Column: Monitor Preview -->
+        <Border x:Name="WallpaperPreviewHost"
+                Grid.Row="1" Grid.Column="0"
+                Margin="0,0,16,0"
+                VerticalAlignment="Stretch"
+                HorizontalAlignment="Stretch">
+            <!-- Monitor Frame (Bezel) -->
+            <Border x:Name="WallpaperPreviewFrame"
+                    HorizontalAlignment="Stretch"
+                    CornerRadius="28"
+                    Background="#FF1A1A1A"
+                    Padding="12">
+                <Border x:Name="WallpaperPreviewViewport"
+                        ClipToBounds="True"
+                        CornerRadius="12"
+                        Background="#30111827">
+                    <Grid>
+                        <vlc:VideoView x:Name="WallpaperPreviewVideoView"
+                                       IsVisible="False"
+                                       IsHitTestVisible="False"
+                                       HorizontalAlignment="Stretch"
+                                       VerticalAlignment="Stretch" />
+
+                        <Grid x:Name="WallpaperPreviewGrid"
+                              HorizontalAlignment="Center"
+                              VerticalAlignment="Center">
+                            <Border x:Name="WallpaperPreviewTopStatusBarHost"
+                                    Grid.Row="0"
+                                    Background="Transparent"
+                                    Padding="2">
+                                <StackPanel x:Name="WallpaperPreviewTopStatusComponentsPanel"
+                                            Orientation="Horizontal"
+                                            Spacing="3">
+                                    <comp:ClockWidget x:Name="WallpaperPreviewClockWidget"
+                                                      IsVisible="False" />
+                                </StackPanel>
+                            </Border>
+
+                            <Border x:Name="WallpaperPreviewBottomTaskbarContainer"
+                                    Classes="glass-strong"
+                                    Grid.Row="1"
+                                    Margin="3"
+                                    CornerRadius="16"
+                                    Padding="2">
+                                <Grid ColumnDefinitions="Auto,*,Auto"
+                                      ColumnSpacing="3">
+                                    <Border x:Name="WallpaperPreviewTaskbarFixedActionsHost" Grid.Column="0">
+                                        <StackPanel x:Name="WallpaperPreviewBackButtonVisual" Orientation="Horizontal" Spacing="3">
+                                            <fi:SymbolIcon Classes="icon-s" Symbol="Window" />
+                                            <TextBlock x:Name="WallpaperPreviewBackButtonTextBlock" Text="Back to Windows" VerticalAlignment="Center" />
+                                        </StackPanel>
+                                    </Border>
+                                     <StackPanel x:Name="WallpaperPreviewTaskbarDynamicActionsHost"
+                                                 Grid.Column="1"
+                                                 Orientation="Horizontal"
+                                                 HorizontalAlignment="Center"
+                                                 Spacing="3" />
+                                    <Border x:Name="WallpaperPreviewTaskbarSettingsActionHost" Grid.Column="2">
+                                        <StackPanel Orientation="Horizontal" Spacing="3">
+                                            <StackPanel x:Name="WallpaperPreviewComponentLibraryVisual" IsVisible="False" Orientation="Horizontal" Spacing="3">
+                                                <fi:FluentIcon Classes="icon-s" Icon="Apps" />
+                                                <TextBlock x:Name="WallpaperPreviewComponentLibraryTextBlock" Text="Widget library" VerticalAlignment="Center" />
+                                            </StackPanel>
+                                            <fi:SymbolIcon x:Name="WallpaperPreviewSettingsButtonIcon" Classes="icon-s" Symbol="Settings" />
+                                        </StackPanel>
+                                    </Border>
+                                </Grid>
+                            </Border>
+                        </Grid>
+                    </Grid>
+                </Border>
+            </Border>
+        </Border>
+
+        <!-- Right Column: Settings Content -->
+        <StackPanel Grid.Row="1" Grid.Column="1"
+                    Margin="16,0,0,0"
+                    Spacing="16">
+            <StackPanel Spacing="8">
+                <TextBlock Text="Preview status" FontSize="12" Foreground="{DynamicResource AdaptiveTextSecondaryBrush}" />
+                <TextBlock x:Name="WallpaperPathTextBlock"
+                           FontSize="14"
+                           FontWeight="Medium"
+                           Foreground="{DynamicResource AdaptiveTextPrimaryBrush}"
+                           TextTrimming="CharacterEllipsis"
+                           Text="No file selected" />
+                <TextBlock x:Name="WallpaperStatusTextBlock"
+                           FontSize="12"
+                           Foreground="{DynamicResource AdaptiveTextMutedBrush}"
+                           Text="Ready" />
+            </StackPanel>
+
+            <Separator Background="{DynamicResource SurfaceStrokeColorDefaultBrush}" Height="1" Margin="0,8" />
+
+            <TextBlock Text="Choose image or video" FontSize="16" FontWeight="SemiBold" Foreground="{DynamicResource AdaptiveTextPrimaryBrush}" />
+            
+            <Grid ColumnDefinitions="*, *" ColumnSpacing="12">
+                <Button x:Name="PickWallpaperButton"
+                        Grid.Column="0"
+                        Classes="accent"
+                        HorizontalAlignment="Stretch"
+                        Padding="0,10"
+                        Content="Browse" />
+                <Button x:Name="ClearWallpaperButton"
+                        Grid.Column="1"
+                        HorizontalAlignment="Stretch"
+                        Padding="0,10"
+                        Content="Reset" />
+            </Grid>
+
+            <Border Classes="settings-expander-shell">
+<ui:SettingsExpander x:Name="WallpaperPlacementSettingsExpander"
+                                                 Header="Placement"
+                                                 Padding="12,8">
+                <ui:SettingsExpander.Footer>
+                    <ComboBox x:Name="WallpaperPlacementComboBox"
+                              Width="120">
+                        <ComboBoxItem Content="Fill" />
+                        <ComboBoxItem Content="Fit" />
+                        <ComboBoxItem Content="Stretch" />
+                        <ComboBoxItem Content="Center" />
+                        <ComboBoxItem Content="Tile" />
+                    </ComboBox>
+                </ui:SettingsExpander.Footer>
+            </ui:SettingsExpander>
+            </Border>
+        </StackPanel>
+    </Grid>
+</UserControl>

LanMountainDesktop/Views/SettingsPages/WallpaperSettingsPage.axaml.cs

@@ -0,0 +1,12 @@
+using Avalonia.Controls;
+using Avalonia.Markup.Xaml;
+
+namespace LanMountainDesktop.Views.SettingsPages;
+
+public partial class WallpaperSettingsPage : UserControl
+{
+    public WallpaperSettingsPage()
+    {
+        InitializeComponent();
+    }
+}

LanMountainDesktop/Views/SettingsPages/WeatherSettingsPage.axaml

@@ -0,0 +1,258 @@
+<UserControl xmlns="https://github.com/avaloniaui"
+             xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
+             xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
+             xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
+             xmlns:ui="using:FluentAvalonia.UI.Controls"
+             xmlns:fi="using:FluentIcons.Avalonia.Fluent"
+             mc:Ignorable="d" d:DesignWidth="800" d:DesignHeight="1200"
+             x:Class="LanMountainDesktop.Views.SettingsPages.WeatherSettingsPage">
+
+    <StackPanel x:Name="WeatherSettingsContentPanel"
+                Margin="0,0,8,0"
+                Spacing="16">
+        <TextBlock x:Name="WeatherPanelTitleTextBlock"
+                   FontSize="24"
+                   FontWeight="SemiBold"
+                   Foreground="{DynamicResource AdaptiveTextPrimaryBrush}"
+                   Text="Weather" />
+
+        <!-- Weather Preview Card -->
+        <Border Classes="settings-expander-shell">
+            <ui:SettingsExpander x:Name="WeatherPreviewSettingsExpander"
+                                 Header="Weather Preview"
+                                 Description="Refresh and verify current weather service status."
+                                 IsExpanded="True">
+                <ui:SettingsExpander.IconSource>
+                    <fi:SymbolIconSource Symbol="WeatherSunny" />
+                </ui:SettingsExpander.IconSource>
+                <ui:SettingsExpander.Footer>
+                    <StackPanel Orientation="Horizontal" Spacing="8">
+                        <Button x:Name="WeatherPreviewButton"
+                                Padding="12,8"
+                                Content="Refresh" />
+                        <ui:ProgressRing x:Name="WeatherPreviewProgressRing"
+                                         Width="20"
+                                         Height="20"
+                                         IsActive="True"
+                                         IsVisible="False" />
+                    </StackPanel>
+                </ui:SettingsExpander.Footer>
+                
+                <ui:SettingsExpanderItem>
+                    <Grid ColumnDefinitions="Auto,*" ColumnSpacing="12">
+                        <Border Width="44"
+                                Height="44"
+                                CornerRadius="{DynamicResource DesignCornerRadiusXs}"
+                                BorderThickness="1"
+                                BorderBrush="{DynamicResource AdaptiveButtonBorderBrush}"
+                                Background="{DynamicResource AdaptiveButtonBackgroundBrush}">
+                            <fi:SymbolIcon x:Name="WeatherPreviewIconSymbol"
+                                           Symbol="WeatherSunny"
+                                           IconVariant="Regular"
+                                           FontSize="22"
+                                           HorizontalAlignment="Center"
+                                           VerticalAlignment="Center" />
+                        </Border>
+                        <StackPanel Grid.Column="1"
+                                    VerticalAlignment="Center"
+                                    Spacing="2">
+                            <TextBlock x:Name="WeatherPreviewTemperatureTextBlock"
+                                       FontSize="22"
+                                       FontWeight="SemiBold"
+                                       Text="--°" />
+                            <TextBlock x:Name="WeatherPreviewUpdatedTextBlock"
+                                       FontSize="12"
+                                       Foreground="{DynamicResource AdaptiveTextSecondaryBrush}"
+                                       Text="-" />
+                        </StackPanel>
+                    </Grid>
+                </ui:SettingsExpanderItem>
+
+                <ui:SettingsExpanderItem>
+                    <TextBlock x:Name="WeatherPreviewResultTextBlock"
+                               Foreground="{DynamicResource AdaptiveTextSecondaryBrush}"
+                               TextWrapping="Wrap"
+                               Text="Use refresh to verify your weather configuration." />
+                </ui:SettingsExpanderItem>
+            </ui:SettingsExpander>
+        </Border>
+
+        <!-- Location Source Card -->
+        <Border Classes="settings-expander-shell">
+            <ui:SettingsExpander x:Name="WeatherLocationSettingsExpander"
+                                 Header="Location Source"
+                                 Description="Choose how weather widgets resolve location."
+                                 IsExpanded="True">
+                <ui:SettingsExpander.IconSource>
+                    <fi:SymbolIconSource Symbol="Location" />
+                </ui:SettingsExpander.IconSource>
+                <ui:SettingsExpander.Footer>
+                    <ListBox x:Name="WeatherLocationModeChipListBox"
+                             Classes="settings-chip-list"
+                             SelectionMode="Single">
+                        <ListBox.ItemsPanel>
+                            <ItemsPanelTemplate>
+                                <WrapPanel Orientation="Horizontal" />
+                            </ItemsPanelTemplate>
+                        </ListBox.ItemsPanel>
+                        <ListBoxItem x:Name="WeatherLocationModeCityChipItem"
+                                     Tag="CitySearch"
+                                     Content="City Search" />
+                        <ListBoxItem x:Name="WeatherLocationModeCoordinatesChipItem"
+                                     Tag="Coordinates"
+                                     Content="Coordinates" />
+                    </ListBox>
+                </ui:SettingsExpander.Footer>
+
+                <ui:SettingsExpanderItem>
+                    <ui:SettingsExpanderItem.Footer>
+                        <ToggleSwitch x:Name="WeatherAutoRefreshToggleSwitch"
+                                      Content="Auto refresh location on startup" />
+                    </ui:SettingsExpanderItem.Footer>
+                </ui:SettingsExpanderItem>
+
+                <!-- ComboBox hidden as in original -->
+                <ComboBox x:Name="WeatherLocationModeComboBox"
+                          IsVisible="False">
+                    <ComboBoxItem x:Name="WeatherLocationModeCityItem" Tag="CitySearch" Content="City Search" />
+                    <ComboBoxItem x:Name="WeatherLocationModeCoordinatesItem" Tag="Coordinates" Content="Coordinates" />
+                </ComboBox>
+            </ui:SettingsExpander>
+        </Border>
+
+        <!-- City Search Card -->
+        <Border Classes="settings-expander-shell">
+            <ui:SettingsExpander x:Name="WeatherCitySearchSettingsExpander"
+                                 Header="City Search"
+                                 Description="Search cities and apply one weather location."
+                                 IsExpanded="True">
+                <ui:SettingsExpander.Footer>
+                    <Button x:Name="WeatherApplyCityButton"
+                            Padding="12,8"
+                            Content="Apply City" />
+                </ui:SettingsExpander.Footer>
+
+                <ui:SettingsExpanderItem Content="Advanced Filters">
+                    <StackPanel Spacing="10">
+                        <Grid ColumnDefinitions="*,Auto,Auto" ColumnSpacing="8">
+                            <TextBox x:Name="WeatherCitySearchTextBox"
+                                     Watermark="e.g. Beijing" />
+                            <ui:ProgressRing x:Name="WeatherSearchProgressRing"
+                                             Grid.Column="1"
+                                             Width="24"
+                                             Height="24"
+                                             IsActive="True"
+                                             IsVisible="False" />
+                            <Button x:Name="WeatherSearchButton"
+                                    Grid.Column="2"
+                                    Padding="12,8"
+                                    Content="Search" />
+                        </Grid>
+                        <ComboBox x:Name="WeatherCityResultsComboBox"
+                                  Width="320" />
+                        <TextBlock x:Name="WeatherSearchStatusTextBlock"
+                                   FontSize="12"
+                                   Foreground="{DynamicResource AdaptiveTextSecondaryBrush}"
+                                   Text="Search by city name and apply one location." />
+                    </StackPanel>
+                </ui:SettingsExpanderItem>
+            </ui:SettingsExpander>
+        </Border>
+
+        <!-- Coordinates Card -->
+        <Border Classes="settings-expander-shell">
+            <ui:SettingsExpander x:Name="WeatherCoordinateSettingsExpander"
+                                 Header="Coordinates"
+                                 Description="Set latitude/longitude and optional key/name."
+                                 IsVisible="False"
+                                 IsExpanded="True">
+                <ui:SettingsExpander.Footer>
+                    <Button x:Name="WeatherApplyCoordinatesButton"
+                            Padding="12,8"
+                            Content="Apply Coordinates" />
+                </ui:SettingsExpander.Footer>
+
+                <ui:SettingsExpanderItem>
+                    <StackPanel Spacing="12">
+                        <Grid ColumnDefinitions="*,*" ColumnSpacing="10">
+                            <ui:NumberBox x:Name="WeatherLatitudeNumberBox"
+                                          Grid.Column="0"
+                                          Header="Latitude"
+                                          Minimum="-90"
+                                          Maximum="90"
+                                          SpinButtonPlacementMode="Inline"
+                                          SmallChange="0.1"
+                                          LargeChange="1"
+                                          Value="39.9042" />
+                            <ui:NumberBox x:Name="WeatherLongitudeNumberBox"
+                                          Grid.Column="1"
+                                          Header="Longitude"
+                                          Minimum="-180"
+                                          Maximum="180"
+                                          SpinButtonPlacementMode="Inline"
+                                          SmallChange="0.1"
+                                          LargeChange="1"
+                                          Value="116.4074" />
+                        </Grid>
+                        <TextBox x:Name="WeatherLocationKeyTextBox"
+                                 Watermark="Location key (optional)" />
+                        <TextBox x:Name="WeatherLocationNameTextBox"
+                                 Watermark="Display name (optional)" />
+                        <TextBlock x:Name="WeatherCoordinateStatusTextBlock"
+                                   FontSize="12"
+                                   Foreground="{DynamicResource AdaptiveTextSecondaryBrush}" />
+                    </StackPanel>
+                </ui:SettingsExpanderItem>
+            </ui:SettingsExpander>
+        </Border>
+
+        <!-- Excluded Alerts Card -->
+        <Border Classes="settings-expander-shell">
+            <ui:SettingsExpander x:Name="WeatherAlertFilterSettingsExpander"
+                                 Header="Excluded Alerts"
+                                 Description="Alerts containing these words will not be shown. One rule per line."
+                                 IsExpanded="True">
+                <ui:SettingsExpanderItem>
+                    <TextBox x:Name="WeatherExcludedAlertsTextBox"
+                             MinHeight="96"
+                             MaxHeight="220"
+                             Width="360"
+                             TextWrapping="Wrap"
+                             AcceptsReturn="True" />
+                </ui:SettingsExpanderItem>
+            </ui:SettingsExpander>
+        </Border>
+
+        <!-- Weather Style Card -->
+        <Border Classes="settings-expander-shell">
+            <ui:SettingsExpander x:Name="WeatherIconPackSettingsExpander"
+                                 Header="Weather Icon Style"
+                                 Description="Choose Fluent Icon style for weather symbols."
+                                 IsExpanded="True">
+                <ui:SettingsExpander.Footer>
+                    <ComboBox x:Name="WeatherIconPackComboBox"
+                              Width="240">
+                        <ComboBoxItem x:Name="WeatherIconPackFluentRegularItem" Tag="FluentRegular" Content="Fluent Regular" />
+                        <ComboBoxItem x:Name="WeatherIconPackFluentFilledItem" Tag="FluentFilled" Content="Fluent Filled" />
+                    </ComboBox>
+                </ui:SettingsExpander.Footer>
+            </ui:SettingsExpander>
+        </Border>
+
+        <!-- No TLS Card -->
+        <Border Classes="settings-expander-shell">
+            <ui:SettingsExpander x:Name="WeatherNoTlsSettingsExpander"
+                                 Header="No TLS Weather Request"
+                                 Description="Not recommended. Enable only for incompatible network environments."
+                                 IsExpanded="True">
+                <ui:SettingsExpander.Footer>
+                    <ToggleSwitch x:Name="WeatherNoTlsToggleSwitch" />
+                </ui:SettingsExpander.Footer>
+            </ui:SettingsExpander>
+        </Border>
+
+        <TextBlock x:Name="WeatherLocationStatusTextBlock"
+                   Foreground="{DynamicResource AdaptiveTextSecondaryBrush}"
+                   Text="No city location is configured." />
+    </StackPanel>
+</UserControl>

LanMountainDesktop/Views/SettingsPages/WeatherSettingsPage.axaml.cs

@@ -0,0 +1,12 @@
+using Avalonia.Controls;
+using Avalonia.Markup.Xaml;
+
+namespace LanMountainDesktop.Views.SettingsPages;
+
+public partial class WeatherSettingsPage : UserControl
+{
+    public WeatherSettingsPage()
+    {
+        InitializeComponent();
+    }
+}

LanMountainDesktop/Views/SettingsWindow.Controls.cs

@@ -0,0 +1,209 @@
+using Avalonia.Controls;
+using Avalonia.Media;
+using Avalonia.Media.Imaging;
+using LibVLCSharp.Avalonia;
+namespace LanMountainDesktop.Views;
+
+public partial class SettingsWindow
+{
+    // --- WallpaperSettingsPage ---
+    internal TextBlock WallpaperPanelTitleTextBlock => WallpaperSettingsPanel.FindControl<TextBlock>("WallpaperPanelTitleTextBlock")!;
+    internal TextBlock WallpaperPathTextBlock => WallpaperSettingsPanel.FindControl<TextBlock>("WallpaperPathTextBlock")!;
+    internal TextBlock WallpaperStatusTextBlock => WallpaperSettingsPanel.FindControl<TextBlock>("WallpaperStatusTextBlock")!;
+    internal ComboBox WallpaperPlacementComboBox => WallpaperSettingsPanel.FindControl<ComboBox>("WallpaperPlacementComboBox")!;
+    internal Border WallpaperPreviewHost => WallpaperSettingsPanel.FindControl<Border>("WallpaperPreviewHost")!;
+    internal Border WallpaperPreviewFrame => WallpaperSettingsPanel.FindControl<Border>("WallpaperPreviewFrame")!;
+    internal Border WallpaperPreviewViewport => WallpaperSettingsPanel.FindControl<Border>("WallpaperPreviewViewport")!;
+    internal LibVLCSharp.Avalonia.VideoView? WallpaperPreviewVideoView => WallpaperSettingsPanel.FindControl<LibVLCSharp.Avalonia.VideoView>("WallpaperPreviewVideoView");
+    internal Grid WallpaperPreviewGrid => WallpaperSettingsPanel.FindControl<Grid>("WallpaperPreviewGrid")!;
+    internal Border WallpaperPreviewTopStatusBarHost => WallpaperSettingsPanel.FindControl<Border>("WallpaperPreviewTopStatusBarHost")!;
+    internal StackPanel WallpaperPreviewTopStatusComponentsPanel => WallpaperSettingsPanel.FindControl<StackPanel>("WallpaperPreviewTopStatusComponentsPanel")!;
+    internal LanMountainDesktop.Views.Components.ClockWidget WallpaperPreviewClockWidget => WallpaperSettingsPanel.FindControl<LanMountainDesktop.Views.Components.ClockWidget>("WallpaperPreviewClockWidget")!;
+    internal Border WallpaperPreviewBottomTaskbarContainer => WallpaperSettingsPanel.FindControl<Border>("WallpaperPreviewBottomTaskbarContainer")!;
+    internal Border WallpaperPreviewTaskbarFixedActionsHost => WallpaperSettingsPanel.FindControl<Border>("WallpaperPreviewTaskbarFixedActionsHost")!;
+    internal StackPanel WallpaperPreviewBackButtonVisual => WallpaperSettingsPanel.FindControl<StackPanel>("WallpaperPreviewBackButtonVisual")!;
+    internal TextBlock WallpaperPreviewBackButtonTextBlock => WallpaperSettingsPanel.FindControl<TextBlock>("WallpaperPreviewBackButtonTextBlock")!;
+    internal StackPanel WallpaperPreviewTaskbarDynamicActionsHost => WallpaperSettingsPanel.FindControl<StackPanel>("WallpaperPreviewTaskbarDynamicActionsHost")!;
+    internal Border WallpaperPreviewTaskbarSettingsActionHost => WallpaperSettingsPanel.FindControl<Border>("WallpaperPreviewTaskbarSettingsActionHost")!;
+    internal StackPanel WallpaperPreviewComponentLibraryVisual => WallpaperSettingsPanel.FindControl<StackPanel>("WallpaperPreviewComponentLibraryVisual")!;
+    internal TextBlock WallpaperPreviewComponentLibraryTextBlock => WallpaperSettingsPanel.FindControl<TextBlock>("WallpaperPreviewComponentLibraryTextBlock")!;
+    internal FluentIcons.Avalonia.SymbolIcon WallpaperPreviewSettingsButtonIcon => WallpaperSettingsPanel.FindControl<FluentIcons.Avalonia.SymbolIcon>("WallpaperPreviewSettingsButtonIcon")!;
+    internal Button PickWallpaperButton => WallpaperSettingsPanel.FindControl<Button>("PickWallpaperButton")!;
+    internal Button ClearWallpaperButton => WallpaperSettingsPanel.FindControl<Button>("ClearWallpaperButton")!;
+    internal FluentAvalonia.UI.Controls.SettingsExpander WallpaperPlacementSettingsExpander => WallpaperSettingsPanel.FindControl<FluentAvalonia.UI.Controls.SettingsExpander>("WallpaperPlacementSettingsExpander")!;
+
+    // --- GridSettingsPage ---
+    internal TextBlock GridPanelTitleTextBlock => GridSettingsPanel.FindControl<TextBlock>("GridPanelTitleTextBlock")!;
+    internal Border GridPreviewHost => GridSettingsPanel.FindControl<Border>("GridPreviewHost")!;
+    internal Border GridPreviewFrame => GridSettingsPanel.FindControl<Border>("GridPreviewFrame")!;
+    internal Border GridPreviewViewport => GridSettingsPanel.FindControl<Border>("GridPreviewViewport")!;
+    internal Canvas GridPreviewLinesCanvas => GridSettingsPanel.FindControl<Canvas>("GridPreviewLinesCanvas")!;
+    internal Grid GridPreviewGrid => GridSettingsPanel.FindControl<Grid>("GridPreviewGrid")!;
+    internal Border GridPreviewTopStatusBarHost => GridSettingsPanel.FindControl<Border>("GridPreviewTopStatusBarHost")!;
+    internal StackPanel GridPreviewTopStatusComponentsPanel => GridSettingsPanel.FindControl<StackPanel>("GridPreviewTopStatusComponentsPanel")!;
+    internal Border GridPreviewBottomTaskbarContainer => GridSettingsPanel.FindControl<Border>("GridPreviewBottomTaskbarContainer")!;
+    internal Border GridPreviewTaskbarFixedActionsHost => GridSettingsPanel.FindControl<Border>("GridPreviewTaskbarFixedActionsHost")!;
+    internal StackPanel GridPreviewBackButtonVisual => GridSettingsPanel.FindControl<StackPanel>("GridPreviewBackButtonVisual")!;
+    internal TextBlock GridPreviewBackButtonTextBlock => GridSettingsPanel.FindControl<TextBlock>("GridPreviewBackButtonTextBlock")!;
+    internal StackPanel GridPreviewTaskbarDynamicActionsHost => GridSettingsPanel.FindControl<StackPanel>("GridPreviewTaskbarDynamicActionsHost")!;
+    internal Border GridPreviewTaskbarSettingsActionHost => GridSettingsPanel.FindControl<Border>("GridPreviewTaskbarSettingsActionHost")!;
+    internal StackPanel GridPreviewComponentLibraryVisual => GridSettingsPanel.FindControl<StackPanel>("GridPreviewComponentLibraryVisual")!;
+    internal FluentIcons.Avalonia.FluentIcon GridPreviewComponentLibraryIcon => GridSettingsPanel.FindControl<FluentIcons.Avalonia.FluentIcon>("GridPreviewComponentLibraryIcon")!;
+    internal TextBlock GridPreviewComponentLibraryTextBlock => GridSettingsPanel.FindControl<TextBlock>("GridPreviewComponentLibraryTextBlock")!;
+    internal FluentIcons.Avalonia.SymbolIcon GridPreviewSettingsButtonIcon => GridSettingsPanel.FindControl<FluentIcons.Avalonia.SymbolIcon>("GridPreviewSettingsButtonIcon")!;
+    internal FluentAvalonia.UI.Controls.SettingsExpander GridRowsSettingsExpander => GridSettingsPanel.FindControl<FluentAvalonia.UI.Controls.SettingsExpander>("GridRowsSettingsExpander")!;
+    internal FluentAvalonia.UI.Controls.SettingsExpander GridSpacingSettingsExpander => GridSettingsPanel.FindControl<FluentAvalonia.UI.Controls.SettingsExpander>("GridSpacingSettingsExpander")!;
+    internal FluentAvalonia.UI.Controls.SettingsExpander GridEdgeInsetSettingsExpander => GridSettingsPanel.FindControl<FluentAvalonia.UI.Controls.SettingsExpander>("GridEdgeInsetSettingsExpander")!;
+    internal Slider GridSizeSlider => GridSettingsPanel.FindControl<Slider>("GridSizeSlider")!;
+    internal FluentAvalonia.UI.Controls.NumberBox GridSizeNumberBox => GridSettingsPanel.FindControl<FluentAvalonia.UI.Controls.NumberBox>("GridSizeNumberBox")!;
+    internal ComboBox GridSpacingPresetComboBox => GridSettingsPanel.FindControl<ComboBox>("GridSpacingPresetComboBox")!;
+    internal ComboBoxItem GridSpacingRelaxedComboBoxItem => GridSettingsPanel.FindControl<ComboBoxItem>("GridSpacingRelaxedComboBoxItem")!;
+    internal ComboBoxItem GridSpacingCompactComboBoxItem => GridSettingsPanel.FindControl<ComboBoxItem>("GridSpacingCompactComboBoxItem")!;
+    internal Slider GridEdgeInsetSlider => GridSettingsPanel.FindControl<Slider>("GridEdgeInsetSlider")!;
+    internal FluentAvalonia.UI.Controls.NumberBox GridEdgeInsetNumberBox => GridSettingsPanel.FindControl<FluentAvalonia.UI.Controls.NumberBox>("GridEdgeInsetNumberBox")!;
+    internal TextBlock GridEdgeInsetComputedPxTextBlock => GridSettingsPanel.FindControl<TextBlock>("GridEdgeInsetComputedPxTextBlock")!;
+    internal Button ApplyGridButton => GridSettingsPanel.FindControl<Button>("ApplyGridButton")!;
+    internal TextBlock GridInfoTextBlock => GridSettingsPanel.FindControl<TextBlock>("GridInfoTextBlock")!;
+
+    // --- ColorSettingsPage ---
+    internal TextBlock ColorPanelTitleTextBlock => ColorSettingsPanel.FindControl<TextBlock>("ColorPanelTitleTextBlock")!;
+    internal FluentAvalonia.UI.Controls.SettingsExpander ThemeModeSettingsExpander => ColorSettingsPanel.FindControl<FluentAvalonia.UI.Controls.SettingsExpander>("ThemeModeSettingsExpander")!;
+    internal FluentAvalonia.UI.Controls.SettingsExpander ThemeColorSettingsExpander => ColorSettingsPanel.FindControl<FluentAvalonia.UI.Controls.SettingsExpander>("ThemeColorSettingsExpander")!;
+    internal ToggleSwitch NightModeToggleSwitch => ColorSettingsPanel.FindControl<ToggleSwitch>("NightModeToggleSwitch")!;
+    internal TextBlock ThemeColorStatusTextBlock => ColorSettingsPanel.FindControl<TextBlock>("ThemeColorStatusTextBlock")!;
+    internal TextBlock RecommendedColorsLabelTextBlock => ColorSettingsPanel.FindControl<TextBlock>("RecommendedColorsLabelTextBlock")!;
+    internal TextBlock SystemMonetColorsLabelTextBlock => ColorSettingsPanel.FindControl<TextBlock>("SystemMonetColorsLabelTextBlock")!;
+    internal Button RecommendedColorButton1 => ColorSettingsPanel.FindControl<Button>("RecommendedColorButton1")!;
+    internal Button RecommendedColorButton2 => ColorSettingsPanel.FindControl<Button>("RecommendedColorButton2")!;
+    internal Button RecommendedColorButton3 => ColorSettingsPanel.FindControl<Button>("RecommendedColorButton3")!;
+    internal Button RecommendedColorButton4 => ColorSettingsPanel.FindControl<Button>("RecommendedColorButton4")!;
+    internal Button RecommendedColorButton5 => ColorSettingsPanel.FindControl<Button>("RecommendedColorButton5")!;
+    internal Button RecommendedColorButton6 => ColorSettingsPanel.FindControl<Button>("RecommendedColorButton6")!;
+    internal Border RecommendedColorSwatch1 => ColorSettingsPanel.FindControl<Border>("RecommendedColorSwatch1")!;
+    internal Border RecommendedColorSwatch2 => ColorSettingsPanel.FindControl<Border>("RecommendedColorSwatch2")!;
+    internal Border RecommendedColorSwatch3 => ColorSettingsPanel.FindControl<Border>("RecommendedColorSwatch3")!;
+    internal Border RecommendedColorSwatch4 => ColorSettingsPanel.FindControl<Border>("RecommendedColorSwatch4")!;
+    internal Border RecommendedColorSwatch5 => ColorSettingsPanel.FindControl<Border>("RecommendedColorSwatch5")!;
+    internal Border RecommendedColorSwatch6 => ColorSettingsPanel.FindControl<Border>("RecommendedColorSwatch6")!;
+    internal Button RefreshMonetColorsButton => ColorSettingsPanel.FindControl<Button>("RefreshMonetColorsButton")!;
+    internal Button MonetColorButton1 => ColorSettingsPanel.FindControl<Button>("MonetColorButton1")!;
+    internal Button MonetColorButton2 => ColorSettingsPanel.FindControl<Button>("MonetColorButton2")!;
+    internal Button MonetColorButton3 => ColorSettingsPanel.FindControl<Button>("MonetColorButton3")!;
+    internal Button MonetColorButton4 => ColorSettingsPanel.FindControl<Button>("MonetColorButton4")!;
+    internal Button MonetColorButton5 => ColorSettingsPanel.FindControl<Button>("MonetColorButton5")!;
+    internal Button MonetColorButton6 => ColorSettingsPanel.FindControl<Button>("MonetColorButton6")!;
+    internal Border MonetColorSwatch1 => ColorSettingsPanel.FindControl<Border>("MonetColorSwatch1")!;
+    internal Border MonetColorSwatch2 => ColorSettingsPanel.FindControl<Border>("MonetColorSwatch2")!;
+    internal Border MonetColorSwatch3 => ColorSettingsPanel.FindControl<Border>("MonetColorSwatch3")!;
+    internal Border MonetColorSwatch4 => ColorSettingsPanel.FindControl<Border>("MonetColorSwatch4")!;
+    internal Border MonetColorSwatch5 => ColorSettingsPanel.FindControl<Border>("MonetColorSwatch5")!;
+    internal Border MonetColorSwatch6 => ColorSettingsPanel.FindControl<Border>("MonetColorSwatch6")!;
+
+    // --- StatusBarSettingsPage ---
+    internal TextBlock StatusBarPanelTitleTextBlock => StatusBarSettingsPanel.FindControl<TextBlock>("StatusBarPanelTitleTextBlock")!;
+    internal FluentAvalonia.UI.Controls.SettingsExpander StatusBarClockSettingsExpander => StatusBarSettingsPanel.FindControl<FluentAvalonia.UI.Controls.SettingsExpander>("StatusBarClockSettingsExpander")!;
+    internal FluentAvalonia.UI.Controls.SettingsExpander StatusBarSpacingSettingsExpander => StatusBarSettingsPanel.FindControl<FluentAvalonia.UI.Controls.SettingsExpander>("StatusBarSpacingSettingsExpander")!;
+    internal ToggleSwitch StatusBarClockToggleSwitch => StatusBarSettingsPanel.FindControl<ToggleSwitch>("StatusBarClockToggleSwitch")!;
+    internal RadioButton ClockFormatHMSSRadio => StatusBarSettingsPanel.FindControl<RadioButton>("ClockFormatHMSSRadio")!;
+    internal RadioButton ClockFormatHMRadio => StatusBarSettingsPanel.FindControl<RadioButton>("ClockFormatHMRadio")!;
+    internal ComboBox StatusBarSpacingModeComboBox => StatusBarSettingsPanel.FindControl<ComboBox>("StatusBarSpacingModeComboBox")!;
+    internal ComboBoxItem StatusBarSpacingModeCompactItem => StatusBarSettingsPanel.FindControl<ComboBoxItem>("StatusBarSpacingModeCompactItem")!;
+    internal ComboBoxItem StatusBarSpacingModeRelaxedItem => StatusBarSettingsPanel.FindControl<ComboBoxItem>("StatusBarSpacingModeRelaxedItem")!;
+    internal ComboBoxItem StatusBarSpacingModeCustomItem => StatusBarSettingsPanel.FindControl<ComboBoxItem>("StatusBarSpacingModeCustomItem")!;
+    internal FluentAvalonia.UI.Controls.SettingsExpanderItem StatusBarSpacingCustomPanel => StatusBarSettingsPanel.FindControl<FluentAvalonia.UI.Controls.SettingsExpanderItem>("StatusBarSpacingCustomPanel")!;
+    internal Slider StatusBarSpacingSlider => StatusBarSettingsPanel.FindControl<Slider>("StatusBarSpacingSlider")!;
+    internal FluentAvalonia.UI.Controls.NumberBox StatusBarSpacingNumberBox => StatusBarSettingsPanel.FindControl<FluentAvalonia.UI.Controls.NumberBox>("StatusBarSpacingNumberBox")!;
+    internal TextBlock StatusBarSpacingComputedPxTextBlock => StatusBarSettingsPanel.FindControl<TextBlock>("StatusBarSpacingComputedPxTextBlock")!;
+
+    // --- RegionSettingsPage ---
+    internal TextBlock RegionPanelTitleTextBlock => RegionSettingsPanel.FindControl<TextBlock>("RegionPanelTitleTextBlock")!;
+    internal FluentAvalonia.UI.Controls.SettingsExpander LanguageSettingsExpander => RegionSettingsPanel.FindControl<FluentAvalonia.UI.Controls.SettingsExpander>("LanguageSettingsExpander")!;
+    internal FluentAvalonia.UI.Controls.SettingsExpander TimeZoneSettingsExpander => RegionSettingsPanel.FindControl<FluentAvalonia.UI.Controls.SettingsExpander>("TimeZoneSettingsExpander")!;
+    internal ComboBox LanguageComboBox => RegionSettingsPanel.FindControl<ComboBox>("LanguageComboBox")!;
+    internal ComboBoxItem LanguageChineseItem => RegionSettingsPanel.FindControl<ComboBoxItem>("LanguageChineseItem")!;
+    internal ComboBoxItem LanguageEnglishItem => RegionSettingsPanel.FindControl<ComboBoxItem>("LanguageEnglishItem")!;
+    internal ComboBox TimeZoneComboBox => RegionSettingsPanel.FindControl<ComboBox>("TimeZoneComboBox")!;
+
+    // --- WeatherSettingsPage ---
+    internal TextBlock WeatherPanelTitleTextBlock => WeatherSettingsPanel.FindControl<TextBlock>("WeatherPanelTitleTextBlock")!;
+    internal FluentAvalonia.UI.Controls.SettingsExpander WeatherPreviewSettingsExpander => WeatherSettingsPanel.FindControl<FluentAvalonia.UI.Controls.SettingsExpander>("WeatherPreviewSettingsExpander")!;
+    internal FluentAvalonia.UI.Controls.SettingsExpander WeatherLocationSettingsExpander => WeatherSettingsPanel.FindControl<FluentAvalonia.UI.Controls.SettingsExpander>("WeatherLocationSettingsExpander")!;
+    internal FluentAvalonia.UI.Controls.SettingsExpander WeatherCitySearchSettingsExpander => WeatherSettingsPanel.FindControl<FluentAvalonia.UI.Controls.SettingsExpander>("WeatherCitySearchSettingsExpander")!;
+    internal FluentAvalonia.UI.Controls.SettingsExpander WeatherCoordinateSettingsExpander => WeatherSettingsPanel.FindControl<FluentAvalonia.UI.Controls.SettingsExpander>("WeatherCoordinateSettingsExpander")!;
+    internal FluentAvalonia.UI.Controls.SettingsExpander WeatherAlertFilterSettingsExpander => WeatherSettingsPanel.FindControl<FluentAvalonia.UI.Controls.SettingsExpander>("WeatherAlertFilterSettingsExpander")!;
+    internal FluentAvalonia.UI.Controls.SettingsExpander WeatherIconPackSettingsExpander => WeatherSettingsPanel.FindControl<FluentAvalonia.UI.Controls.SettingsExpander>("WeatherIconPackSettingsExpander")!;
+    internal FluentAvalonia.UI.Controls.SettingsExpander WeatherNoTlsSettingsExpander => WeatherSettingsPanel.FindControl<FluentAvalonia.UI.Controls.SettingsExpander>("WeatherNoTlsSettingsExpander")!;
+    internal Button WeatherPreviewButton => WeatherSettingsPanel.FindControl<Button>("WeatherPreviewButton")!;
+    internal ComboBox WeatherLocationModeComboBox => WeatherSettingsPanel.FindControl<ComboBox>("WeatherLocationModeComboBox")!;
+    internal ComboBoxItem WeatherLocationModeCityItem => WeatherSettingsPanel.FindControl<ComboBoxItem>("WeatherLocationModeCityItem")!;
+    internal ComboBoxItem WeatherLocationModeCoordinatesItem => WeatherSettingsPanel.FindControl<ComboBoxItem>("WeatherLocationModeCoordinatesItem")!;
+    internal ListBoxItem WeatherLocationModeCityChipItem => WeatherSettingsPanel.FindControl<ListBoxItem>("WeatherLocationModeCityChipItem")!;
+    internal ListBoxItem WeatherLocationModeCoordinatesChipItem => WeatherSettingsPanel.FindControl<ListBoxItem>("WeatherLocationModeCoordinatesChipItem")!;
+    internal ListBox WeatherLocationModeChipListBox => WeatherSettingsPanel.FindControl<ListBox>("WeatherLocationModeChipListBox")!;
+    internal ToggleSwitch WeatherAutoRefreshToggleSwitch => WeatherSettingsPanel.FindControl<ToggleSwitch>("WeatherAutoRefreshToggleSwitch")!;
+    internal Button WeatherSearchButton => WeatherSettingsPanel.FindControl<Button>("WeatherSearchButton")!;
+    internal Button WeatherApplyCityButton => WeatherSettingsPanel.FindControl<Button>("WeatherApplyCityButton")!;
+    internal Button WeatherApplyCoordinatesButton => WeatherSettingsPanel.FindControl<Button>("WeatherApplyCoordinatesButton")!;
+    internal TextBox WeatherExcludedAlertsTextBox => WeatherSettingsPanel.FindControl<TextBox>("WeatherExcludedAlertsTextBox")!;
+    internal ComboBox WeatherIconPackComboBox => WeatherSettingsPanel.FindControl<ComboBox>("WeatherIconPackComboBox")!;
+    internal ToggleSwitch WeatherNoTlsToggleSwitch => WeatherSettingsPanel.FindControl<ToggleSwitch>("WeatherNoTlsToggleSwitch")!;
+    internal TextBox WeatherCitySearchTextBox => WeatherSettingsPanel.FindControl<TextBox>("WeatherCitySearchTextBox")!;
+    internal ComboBox WeatherCityResultsComboBox => WeatherSettingsPanel.FindControl<ComboBox>("WeatherCityResultsComboBox")!;
+    internal TextBlock WeatherSearchStatusTextBlock => WeatherSettingsPanel.FindControl<TextBlock>("WeatherSearchStatusTextBlock")!;
+    internal TextBox WeatherLocationKeyTextBox => WeatherSettingsPanel.FindControl<TextBox>("WeatherLocationKeyTextBox")!;
+    internal TextBox WeatherLocationNameTextBox => WeatherSettingsPanel.FindControl<TextBox>("WeatherLocationNameTextBox")!;
+    internal FluentAvalonia.UI.Controls.NumberBox WeatherLatitudeNumberBox => WeatherSettingsPanel.FindControl<FluentAvalonia.UI.Controls.NumberBox>("WeatherLatitudeNumberBox")!;
+    internal FluentAvalonia.UI.Controls.NumberBox WeatherLongitudeNumberBox => WeatherSettingsPanel.FindControl<FluentAvalonia.UI.Controls.NumberBox>("WeatherLongitudeNumberBox")!;
+    internal TextBlock WeatherCoordinateStatusTextBlock => WeatherSettingsPanel.FindControl<TextBlock>("WeatherCoordinateStatusTextBlock")!;
+    internal TextBlock WeatherPreviewResultTextBlock => WeatherSettingsPanel.FindControl<TextBlock>("WeatherPreviewResultTextBlock")!;
+    internal FluentIcons.Avalonia.Fluent.SymbolIcon WeatherPreviewIconSymbol => WeatherSettingsPanel.FindControl<FluentIcons.Avalonia.Fluent.SymbolIcon>("WeatherPreviewIconSymbol")!;
+    internal TextBlock WeatherPreviewTemperatureTextBlock => WeatherSettingsPanel.FindControl<TextBlock>("WeatherPreviewTemperatureTextBlock")!;
+    internal TextBlock WeatherPreviewUpdatedTextBlock => WeatherSettingsPanel.FindControl<TextBlock>("WeatherPreviewUpdatedTextBlock")!;
+    internal FluentAvalonia.UI.Controls.ProgressRing WeatherSearchProgressRing => WeatherSettingsPanel.FindControl<FluentAvalonia.UI.Controls.ProgressRing>("WeatherSearchProgressRing")!;
+    internal FluentAvalonia.UI.Controls.ProgressRing WeatherPreviewProgressRing => WeatherSettingsPanel.FindControl<FluentAvalonia.UI.Controls.ProgressRing>("WeatherPreviewProgressRing")!;
+    internal ComboBoxItem WeatherIconPackFluentRegularItem => WeatherSettingsPanel.FindControl<ComboBoxItem>("WeatherIconPackFluentRegularItem")!;
+    internal ComboBoxItem WeatherIconPackFluentFilledItem => WeatherSettingsPanel.FindControl<ComboBoxItem>("WeatherIconPackFluentFilledItem")!;
+    internal TextBlock WeatherLocationStatusTextBlock => WeatherSettingsPanel.FindControl<TextBlock>("WeatherLocationStatusTextBlock")!;
+
+    // --- UpdateSettingsPage ---
+    internal TextBlock UpdatePanelTitleTextBlock => UpdateSettingsPanel.FindControl<TextBlock>("UpdatePanelTitleTextBlock")!;
+    internal FluentAvalonia.UI.Controls.SettingsExpander UpdateOptionsSettingsExpander => UpdateSettingsPanel.FindControl<FluentAvalonia.UI.Controls.SettingsExpander>("UpdateOptionsSettingsExpander")!;
+    internal FluentAvalonia.UI.Controls.SettingsExpander UpdateActionsSettingsExpander => UpdateSettingsPanel.FindControl<FluentAvalonia.UI.Controls.SettingsExpander>("UpdateActionsSettingsExpander")!;
+    internal TextBlock UpdateCurrentVersionLabelTextBlock => UpdateSettingsPanel.FindControl<TextBlock>("UpdateCurrentVersionLabelTextBlock")!;
+    internal TextBlock UpdateCurrentVersionValueTextBlock => UpdateSettingsPanel.FindControl<TextBlock>("UpdateCurrentVersionValueTextBlock")!;
+    internal TextBlock UpdateLatestVersionLabelTextBlock => UpdateSettingsPanel.FindControl<TextBlock>("UpdateLatestVersionLabelTextBlock")!;
+    internal TextBlock UpdateLatestVersionValueTextBlock => UpdateSettingsPanel.FindControl<TextBlock>("UpdateLatestVersionValueTextBlock")!;
+    internal TextBlock UpdatePublishedAtLabelTextBlock => UpdateSettingsPanel.FindControl<TextBlock>("UpdatePublishedAtLabelTextBlock")!;
+    internal TextBlock UpdatePublishedAtValueTextBlock => UpdateSettingsPanel.FindControl<TextBlock>("UpdatePublishedAtValueTextBlock")!;
+    internal TextBlock UpdateChannelLabelTextBlock => UpdateSettingsPanel.FindControl<TextBlock>("UpdateChannelLabelTextBlock")!;
+    internal ListBoxItem UpdateChannelStableChipItem => UpdateSettingsPanel.FindControl<ListBoxItem>("UpdateChannelStableChipItem")!;
+    internal ListBoxItem UpdateChannelPreviewChipItem => UpdateSettingsPanel.FindControl<ListBoxItem>("UpdateChannelPreviewChipItem")!;
+    internal ToggleSwitch AutoCheckUpdatesToggleSwitch => UpdateSettingsPanel.FindControl<ToggleSwitch>("AutoCheckUpdatesToggleSwitch")! ;
+    internal ListBox UpdateChannelChipListBox => UpdateSettingsPanel.FindControl<ListBox>("UpdateChannelChipListBox")!;
+    internal Button CheckForUpdatesButton => UpdateSettingsPanel.FindControl<Button>("CheckForUpdatesButton")!;
+    internal Button DownloadAndInstallUpdateButton => UpdateSettingsPanel.FindControl<Button>("DownloadAndInstallUpdateButton")!;
+    internal ProgressBar UpdateDownloadProgressBar => UpdateSettingsPanel.FindControl<ProgressBar>("UpdateDownloadProgressBar")!;
+    internal TextBlock UpdateDownloadProgressTextBlock => UpdateSettingsPanel.FindControl<TextBlock>("UpdateDownloadProgressTextBlock")!;
+    internal TextBlock UpdateStatusTextBlock => UpdateSettingsPanel.FindControl<TextBlock>("UpdateStatusTextBlock")!;
+
+    // --- AboutSettingsPage ---
+    internal TextBlock AboutPanelTitleTextBlock => AboutSettingsPanel.FindControl<TextBlock>("AboutPanelTitleTextBlock")!;
+    internal FluentAvalonia.UI.Controls.SettingsExpander AboutStartupSettingsExpander => AboutSettingsPanel.FindControl<FluentAvalonia.UI.Controls.SettingsExpander>("AboutStartupSettingsExpander")!;
+    internal ToggleSwitch AutoStartWithWindowsToggleSwitch => AboutSettingsPanel.FindControl<ToggleSwitch>("AutoStartWithWindowsToggleSwitch")!;
+    internal TextBlock VersionTextBlock => AboutSettingsPanel.FindControl<TextBlock>("VersionTextBlock")!;
+    internal TextBlock CodeNameTextBlock => AboutSettingsPanel.FindControl<TextBlock>("CodeNameTextBlock")!;
+    internal TextBlock FontInfoTextBlock => AboutSettingsPanel.FindControl<TextBlock>("FontInfoTextBlock")!;
+
+    // --- LauncherSettingsPage ---
+    internal TextBlock LauncherSettingsPanelTitleTextBlock => LauncherSettingsPanel.FindControl<TextBlock>("LauncherSettingsPanelTitleTextBlock")!;
+    internal FluentAvalonia.UI.Controls.SettingsExpander LauncherHiddenItemsSettingsExpander => LauncherSettingsPanel.FindControl<FluentAvalonia.UI.Controls.SettingsExpander>("LauncherHiddenItemsSettingsExpander")!;
+    internal StackPanel LauncherHiddenItemsListPanel => LauncherSettingsPanel.FindControl<StackPanel>("LauncherHiddenItemsListPanel")!;
+    internal TextBlock LauncherHiddenItemsEmptyTextBlock => LauncherSettingsPanel.FindControl<TextBlock>("LauncherHiddenItemsEmptyTextBlock")!;
+    internal TextBlock LauncherHiddenItemsDescriptionTextBlock => LauncherSettingsPanel.FindControl<TextBlock>("LauncherHiddenItemsDescriptionTextBlock")!;
+
+    // --- PluginSettingsPage (Added for completeness) ---
+    internal TextBlock PluginSettingsPanelTitleTextBlock => PluginSettingsPanel.FindControl<TextBlock>("PluginSettingsPanelTitleTextBlock")!;
+    internal FluentAvalonia.UI.Controls.SettingsExpander PluginSystemSettingsExpander => PluginSettingsPanel.FindControl<FluentAvalonia.UI.Controls.SettingsExpander>("PluginSystemSettingsExpander")!;
+    internal TextBlock PluginSystemDescriptionTextBlock => PluginSettingsPanel.FindControl<TextBlock>("PluginSystemDescriptionTextBlock")!;
+    internal TextBlock PluginSystemStatusTextBlock => PluginSettingsPanel.FindControl<TextBlock>("PluginSystemStatusTextBlock")!;
+}

LanMountainDesktop/Views/SettingsWindow.Core.cs

@@ -0,0 +1,516 @@
+using System;
+using System.Collections.Generic;
+using System.IO;
+using System.Linq;
+using Avalonia;
+using Avalonia.Controls;
+using Avalonia.Interactivity;
+using Avalonia.Layout;
+using Avalonia.Media;
+using Avalonia.Threading;
+using FluentIcons.Avalonia.Fluent;
+using FluentIcons.Common;
+using LanMountainDesktop.ComponentSystem;
+using LanMountainDesktop.Models;
+using LanMountainDesktop.Views.Components;
+
+namespace LanMountainDesktop.Views;
+
+public partial class SettingsWindow
+{
+    protected override void OnClosed(EventArgs e)
+    {
+        _persistSettingsDebounceTimer?.Dispose();
+        _persistSettingsDebounceTimer = null;
+
+        StopVideoWallpaper();
+        _previewVideoWallpaperPlayer?.Dispose();
+        _previewVideoWallpaperPlayer = null;
+        _previewVideoWallpaperMedia?.Dispose();
+        _previewVideoWallpaperMedia = null;
+        _libVlc?.Dispose();
+        _libVlc = null;
+
+        _releaseUpdateService.Dispose();
+        _wallpaperBitmap?.Dispose();
+        _wallpaperBitmap = null;
+        _launcherFolderIconBitmap?.Dispose();
+        _launcherFolderIconBitmap = null;
+
+        foreach (var icon in _launcherIconCache.Values)
+        {
+            icon.Dispose();
+        }
+
+        _launcherIconCache.Clear();
+        base.OnClosed(e);
+    }
+
+    private void OnSettingsNavSelectionChanged(object? sender, FluentAvalonia.UI.Controls.NavigationViewSelectionChangedEventArgs e)
+    {
+        UpdateSettingsTabContent();
+        PersistSettings();
+    }
+
+    private int GetSettingsTabIndex()
+    {
+        if (SettingsNavView?.SelectedItem is FluentAvalonia.UI.Controls.NavigationViewItem item)
+        {
+            return item.Tag?.ToString() switch
+            {
+                "Wallpaper" => 0,
+                "Grid" => 1,
+                "Color" => 2,
+                "StatusBar" => 3,
+                "Weather" => 4,
+                "Region" => 5,
+                "Update" => 6,
+                "About" => 7,
+                "Launcher" => 8,
+                "Plugins" => 9,
+                _ => 0
+            };
+        }
+
+        return 0;
+    }
+
+    private void UpdateSettingsTabContent()
+    {
+        if (SettingsNavView is null)
+        {
+            return;
+        }
+
+        var selectedItem = SettingsNavView.SelectedItem as FluentAvalonia.UI.Controls.NavigationViewItem;
+        var tag = selectedItem?.Tag?.ToString();
+
+        WallpaperSettingsPanel.IsVisible = tag == "Wallpaper";
+        GridSettingsPanel.IsVisible = tag == "Grid";
+        ColorSettingsPanel.IsVisible = tag == "Color";
+        StatusBarSettingsPanel.IsVisible = tag == "StatusBar";
+        WeatherSettingsPanel.IsVisible = tag == "Weather";
+        RegionSettingsPanel.IsVisible = tag == "Region";
+        UpdateSettingsPanel.IsVisible = tag == "Update";
+        AboutSettingsPanel.IsVisible = tag == "About";
+        LauncherSettingsPanel.IsVisible = tag == "Launcher";
+        PluginSettingsPanel.IsVisible = tag == "Plugins";
+
+        if (tag == "Launcher")
+        {
+            RenderLauncherHiddenItemsList();
+        }
+
+        if (tag == "Grid")
+        {
+            UpdateGridPreviewLayout();
+        }
+
+        ApplyTaskbarActionVisibility(GetCurrentTaskbarContext());
+    }
+
+    private void PersistSettings()
+    {
+        if (_suppressSettingsPersistence)
+        {
+            return;
+        }
+
+        _appSettingsService.Save(BuildAppSettingsSnapshot());
+        _launcherSettingsService.Save(BuildLauncherSettingsSnapshot());
+    }
+
+    private AppSettingsSnapshot BuildAppSettingsSnapshot()
+    {
+        return new AppSettingsSnapshot
+        {
+            GridShortSideCells = _targetShortSideCells,
+            GridSpacingPreset = _gridSpacingPreset,
+            DesktopEdgeInsetPercent = _desktopEdgeInsetPercent,
+            IsNightMode = _isNightMode,
+            ThemeColor = _selectedThemeColor.ToString(),
+            WallpaperPath = _wallpaperPath,
+            WallpaperPlacement = GetPlacementDisplayName(GetSelectedWallpaperPlacement()),
+            SettingsTabIndex = Math.Max(0, GetSettingsTabIndex()),
+            LanguageCode = _languageCode,
+            TimeZoneId = _timeZoneService.CurrentTimeZone.Id,
+            WeatherLocationMode = ToWeatherLocationModeTag(_weatherLocationMode),
+            WeatherLocationKey = _weatherLocationKey,
+            WeatherLocationName = _weatherLocationName,
+            WeatherLatitude = _weatherLatitude,
+            WeatherLongitude = _weatherLongitude,
+            WeatherAutoRefreshLocation = _weatherAutoRefreshLocation,
+            WeatherLocationQuery = BuildLegacyWeatherLocationQuery(),
+            WeatherExcludedAlerts = _weatherExcludedAlertsRaw,
+            WeatherIconPackId = _weatherIconPackId,
+            WeatherNoTlsRequests = _weatherNoTlsRequests,
+            AutoStartWithWindows = _autoStartWithWindows,
+            AutoCheckUpdates = _autoCheckUpdates,
+            IncludePrereleaseUpdates = IncludePrereleaseUpdates,
+            UpdateChannel = IncludePrereleaseUpdates ? UpdateChannelPreview : UpdateChannelStable,
+            TopStatusComponentIds = _topStatusComponentIds.ToList(),
+            PinnedTaskbarActions = _pinnedTaskbarActions.Select(action => action.ToString()).ToList(),
+            EnableDynamicTaskbarActions = _enableDynamicTaskbarActions,
+            TaskbarLayoutMode = _taskbarLayoutMode,
+            ClockDisplayFormat = _clockDisplayFormat == ClockDisplayFormat.HourMinute ? "HourMinute" : "HourMinuteSecond",
+            StatusBarSpacingMode = _statusBarSpacingMode,
+            StatusBarCustomSpacingPercent = _statusBarCustomSpacingPercent
+        };
+    }
+
+    private LauncherSettingsSnapshot BuildLauncherSettingsSnapshot()
+    {
+        return new LauncherSettingsSnapshot
+        {
+            HiddenLauncherFolderPaths = _hiddenLauncherFolderPaths.OrderBy(path => path, StringComparer.OrdinalIgnoreCase).ToList(),
+            HiddenLauncherAppPaths = _hiddenLauncherAppPaths.OrderBy(path => path, StringComparer.OrdinalIgnoreCase).ToList()
+        };
+    }
+
+    private void SchedulePersistSettings(int delayMs = 200)
+    {
+        if (_suppressSettingsPersistence)
+        {
+            return;
+        }
+
+        _persistSettingsDebounceTimer?.Dispose();
+        _persistSettingsDebounceTimer = DispatcherTimer.RunOnce(() =>
+        {
+            _persistSettingsDebounceTimer = null;
+            PersistSettings();
+        }, TimeSpan.FromMilliseconds(Math.Max(0, delayMs)));
+    }
+
+    private int CalculateDefaultShortSideCellCountFromDpi()
+    {
+        var dpi = 96d * RenderScaling;
+        var count = (int)Math.Round(dpi / 8d);
+        return Math.Clamp(count, MinShortSideCells, MaxShortSideCells);
+    }
+
+    private static string NormalizeGridSpacingPreset(string? value)
+    {
+        return string.Equals(value, "Compact", StringComparison.OrdinalIgnoreCase)
+            ? "Compact"
+            : "Relaxed";
+    }
+
+    private static string NormalizeStatusBarSpacingMode(string? value)
+    {
+        return value switch
+        {
+            _ when string.Equals(value, "Compact", StringComparison.OrdinalIgnoreCase) => "Compact",
+            _ when string.Equals(value, "Custom", StringComparison.OrdinalIgnoreCase) => "Custom",
+            _ => "Relaxed"
+        };
+    }
+
+    private static string? TryGetSelectedComboBoxTag(ComboBox? comboBox)
+    {
+        if (comboBox?.SelectedItem is ComboBoxItem item)
+        {
+            return item.Tag?.ToString();
+        }
+
+        return comboBox?.SelectedItem?.ToString();
+    }
+
+    private int ResolveStatusBarSpacingPercent()
+    {
+        return _statusBarSpacingMode switch
+        {
+            "Compact" => 6,
+            "Custom" => Math.Clamp(_statusBarCustomSpacingPercent, 0, 30),
+            _ => 12
+        };
+    }
+
+    private void ApplyStatusBarComponentSpacingForPanel(StackPanel? panel, double cellSize)
+    {
+        if (panel is null)
+        {
+            return;
+        }
+
+        var percent = ResolveStatusBarSpacingPercent();
+        panel.Spacing = Math.Max(0, cellSize) * (percent / 100d);
+    }
+
+    private void UpdateStatusBarSpacingComputedPxText(double cellSize)
+    {
+        var percent = ResolveStatusBarSpacingPercent();
+        var spacingPx = Math.Max(0, cellSize) * (percent / 100d);
+        StatusBarSpacingComputedPxTextBlock.Text = Lf(
+            "settings.status_bar.spacing_custom_px_format",
+            ">= {0:F1}px",
+            spacingPx);
+    }
+
+    private int ResolvePendingGridEdgeInsetPercent()
+    {
+        var pending = (int)Math.Round(GridEdgeInsetNumberBox.Value);
+        return Math.Clamp(pending, MinEdgeInsetPercent, MaxEdgeInsetPercent);
+    }
+
+    private void UpdateGridEdgeInsetComputedPxText(double cellSize)
+    {
+        var percent = ResolvePendingGridEdgeInsetPercent();
+        var insetPx = Math.Clamp(Math.Max(0, cellSize) * (percent / 100d), 0, 80);
+        GridEdgeInsetComputedPxTextBlock.Text = Lf("settings.grid.edge_inset_px_format", "{0:F1}px", insetPx);
+    }
+
+    private void OnStatusBarClockChecked(object? sender, RoutedEventArgs e)
+    {
+        if (_suppressStatusBarToggleEvents)
+        {
+            return;
+        }
+
+        _topStatusComponentIds.Add(BuiltInComponentIds.Clock);
+        ApplyTopStatusComponentVisibility();
+        UpdateWallpaperPreviewLayout();
+        PersistSettings();
+    }
+
+    private void OnStatusBarClockUnchecked(object? sender, RoutedEventArgs e)
+    {
+        if (_suppressStatusBarToggleEvents)
+        {
+            return;
+        }
+
+        _topStatusComponentIds.Remove(BuiltInComponentIds.Clock);
+        ApplyTopStatusComponentVisibility();
+        UpdateWallpaperPreviewLayout();
+        PersistSettings();
+    }
+
+    private void OnClockFormatChanged(object? sender, RoutedEventArgs e)
+    {
+        if (sender is not RadioButton radioButton || radioButton.Tag is not string formatTag)
+        {
+            return;
+        }
+
+        _clockDisplayFormat = formatTag == "Hm"
+            ? ClockDisplayFormat.HourMinute
+            : ClockDisplayFormat.HourMinuteSecond;
+        ClockWidget.SetDisplayFormat(_clockDisplayFormat);
+        WallpaperPreviewClockWidget.SetDisplayFormat(_clockDisplayFormat);
+        ApplyTopStatusComponentVisibility();
+        UpdateWallpaperPreviewLayout();
+        PersistSettings();
+    }
+
+    private void ApplyTaskbarSettings(AppSettingsSnapshot snapshot)
+    {
+        _topStatusComponentIds.Clear();
+        if (snapshot.TopStatusComponentIds is not null)
+        {
+            foreach (var componentId in snapshot.TopStatusComponentIds)
+            {
+                if (string.IsNullOrWhiteSpace(componentId))
+                {
+                    continue;
+                }
+
+                var normalizedId = componentId.Trim();
+                if (_componentRegistry.IsKnownComponent(normalizedId) &&
+                    _componentRegistry.AllowsStatusBarPlacement(normalizedId))
+                {
+                    _topStatusComponentIds.Add(normalizedId);
+                }
+            }
+        }
+
+        _pinnedTaskbarActions.Clear();
+        if (snapshot.PinnedTaskbarActions is not null)
+        {
+            foreach (var actionText in snapshot.PinnedTaskbarActions)
+            {
+                if (Enum.TryParse<TaskbarActionId>(actionText, ignoreCase: true, out var action))
+                {
+                    _pinnedTaskbarActions.Add(action);
+                }
+            }
+        }
+
+        if (_pinnedTaskbarActions.Count == 0)
+        {
+            foreach (var action in DefaultPinnedTaskbarActions)
+            {
+                _pinnedTaskbarActions.Add(action);
+            }
+        }
+
+        _enableDynamicTaskbarActions = snapshot.EnableDynamicTaskbarActions;
+        _taskbarLayoutMode = string.IsNullOrWhiteSpace(snapshot.TaskbarLayoutMode)
+            ? TaskbarLayoutBottomFullRowMacStyle
+            : snapshot.TaskbarLayoutMode;
+        _clockDisplayFormat = snapshot.ClockDisplayFormat == "HourMinute"
+            ? ClockDisplayFormat.HourMinute
+            : ClockDisplayFormat.HourMinuteSecond;
+
+        ClockWidget.SetDisplayFormat(_clockDisplayFormat);
+        WallpaperPreviewClockWidget.SetDisplayFormat(_clockDisplayFormat);
+
+        if (_clockDisplayFormat == ClockDisplayFormat.HourMinute)
+        {
+            ClockFormatHMRadio.IsChecked = true;
+        }
+        else
+        {
+            ClockFormatHMSSRadio.IsChecked = true;
+        }
+
+        _suppressStatusBarToggleEvents = true;
+        StatusBarClockToggleSwitch.IsChecked = _topStatusComponentIds.Contains(BuiltInComponentIds.Clock);
+        _suppressStatusBarToggleEvents = false;
+    }
+
+    private void ApplyTopStatusComponentVisibility()
+    {
+        var showClock = _topStatusComponentIds.Contains(BuiltInComponentIds.Clock);
+
+        ClockWidget.IsVisible = showClock;
+        if (showClock)
+        {
+            ClockWidget.SetDisplayFormat(_clockDisplayFormat);
+            Grid.SetColumnSpan(ClockWidget, _clockDisplayFormat == ClockDisplayFormat.HourMinute ? 2 : 3);
+        }
+
+        WallpaperPreviewClockWidget.IsVisible = showClock;
+        if (showClock)
+        {
+            WallpaperPreviewClockWidget.SetDisplayFormat(_clockDisplayFormat);
+        }
+    }
+
+    private TaskbarContext GetCurrentTaskbarContext()
+    {
+        var selectedItem = SettingsNavView?.SelectedItem as FluentAvalonia.UI.Controls.NavigationViewItem;
+        return selectedItem?.Tag?.ToString() switch
+        {
+            "Wallpaper" => TaskbarContext.SettingsWallpaper,
+            "Grid" => TaskbarContext.SettingsGrid,
+            "Color" => TaskbarContext.SettingsColor,
+            "StatusBar" => TaskbarContext.SettingsStatusBar,
+            "Weather" => TaskbarContext.SettingsWeather,
+            "Region" => TaskbarContext.SettingsRegion,
+            _ => TaskbarContext.Desktop
+        };
+    }
+
+    private void ApplyTaskbarActionVisibility(TaskbarContext context)
+    {
+        _ = context;
+
+        var showMinimize = _pinnedTaskbarActions.Contains(TaskbarActionId.MinimizeToWindows);
+        var showSettings = _pinnedTaskbarActions.Contains(TaskbarActionId.OpenSettings);
+
+        BackToWindowsButton.IsVisible = showMinimize;
+        OpenComponentLibraryButton.IsVisible = false;
+        OpenSettingsButton.IsVisible = showSettings;
+
+        WallpaperPreviewBackButtonVisual.IsVisible = showMinimize;
+        WallpaperPreviewComponentLibraryVisual.IsVisible = false;
+        WallpaperPreviewSettingsButtonIcon.IsVisible = showSettings;
+
+        TaskbarFixedActionsHost.IsVisible = showMinimize;
+        TaskbarSettingsActionHost.IsVisible = showSettings;
+        TaskbarDynamicActionsHost.IsVisible = false;
+        WallpaperPreviewTaskbarFixedActionsHost.IsVisible = showMinimize;
+        WallpaperPreviewTaskbarSettingsActionHost.IsVisible = showSettings;
+        WallpaperPreviewTaskbarDynamicActionsHost.IsVisible = false;
+
+        UpdateOpenSettingsActionVisualState();
+    }
+
+    private void UpdateOpenSettingsActionVisualState()
+    {
+        OpenSettingsButtonTextBlock.IsVisible = false;
+        OpenSettingsButtonTextBlock.Text = L("tooltip.open_settings", "Settings");
+    }
+
+    private void InitializeSettingsIcons()
+    {
+        const IconVariant variant = IconVariant.Regular;
+
+        WallpaperPlacementSettingsExpander.IconSource = new SymbolIconSource { Symbol = Symbol.Wallpaper, IconVariant = variant };
+        ThemeColorSettingsExpander.IconSource = new SymbolIconSource { Symbol = Symbol.Color, IconVariant = variant };
+        StatusBarClockSettingsExpander.IconSource = new SymbolIconSource { Symbol = Symbol.Clock, IconVariant = variant };
+        StatusBarSpacingSettingsExpander.IconSource = new SymbolIconSource { Symbol = Symbol.TextLineSpacing, IconVariant = variant };
+        WeatherLocationSettingsExpander.IconSource = new SymbolIconSource { Symbol = Symbol.WeatherSunny, IconVariant = variant };
+        WeatherPreviewSettingsExpander.IconSource = new SymbolIconSource { Symbol = Symbol.WeatherSunny, IconVariant = variant };
+        WeatherAlertFilterSettingsExpander.IconSource = new SymbolIconSource { Symbol = Symbol.Info, IconVariant = variant };
+        WeatherIconPackSettingsExpander.IconSource = new SymbolIconSource { Symbol = Symbol.Color, IconVariant = variant };
+        WeatherNoTlsSettingsExpander.IconSource = new SymbolIconSource { Symbol = Symbol.Globe, IconVariant = variant };
+        LanguageSettingsExpander.IconSource = new SymbolIconSource { Symbol = Symbol.Translate, IconVariant = variant };
+        TimeZoneSettingsExpander.IconSource = new SymbolIconSource { Symbol = Symbol.GlobeClock, IconVariant = variant };
+        UpdateOptionsSettingsExpander.IconSource = new SymbolIconSource { Symbol = Symbol.ArrowClockwiseDashesSettings, IconVariant = variant };
+        UpdateActionsSettingsExpander.IconSource = new SymbolIconSource { Symbol = Symbol.ArrowDownload, IconVariant = variant };
+        AboutStartupSettingsExpander.IconSource = new SymbolIconSource { Symbol = Symbol.Play, IconVariant = variant };
+        PluginSystemSettingsExpander.IconSource = new SymbolIconSource { Symbol = Symbol.PuzzlePiece, IconVariant = variant };
+        UpdateThemeModeIcon();
+    }
+
+    private void UpdateThemeModeIcon()
+    {
+        ThemeModeSettingsExpander.IconSource = new SymbolIconSource
+        {
+            Symbol = _isNightMode ? Symbol.WeatherMoon : Symbol.WeatherSunny,
+            IconVariant = IconVariant.Regular
+        };
+    }
+
+    private void InitializeTimeZoneSettings()
+    {
+        _suppressTimeZoneSelectionEvents = true;
+        TimeZoneComboBox.Items.Clear();
+        foreach (var tz in _timeZoneService.GetAllTimeZones())
+        {
+            var item = new ComboBoxItem
+            {
+                Content = GetLocalizedTimeZoneDisplayName(tz),
+                Tag = tz.Id
+            };
+            TimeZoneComboBox.Items.Add(item);
+            if (tz.Id == _timeZoneService.CurrentTimeZone.Id)
+            {
+                TimeZoneComboBox.SelectedItem = item;
+            }
+        }
+
+        ClockWidget.SetTimeZoneService(_timeZoneService);
+        WallpaperPreviewClockWidget.SetTimeZoneService(_timeZoneService);
+        _suppressTimeZoneSelectionEvents = false;
+    }
+
+    private void OnTimeZoneSelectionChanged(object? sender, SelectionChangedEventArgs e)
+    {
+        if (_suppressTimeZoneSelectionEvents || TimeZoneComboBox.SelectedItem is not ComboBoxItem item)
+        {
+            return;
+        }
+
+        var timeZoneId = item.Tag?.ToString();
+        if (string.IsNullOrWhiteSpace(timeZoneId))
+        {
+            return;
+        }
+
+        _timeZoneService.SetTimeZoneById(timeZoneId);
+        PersistSettings();
+    }
+
+    private IBrush GetThemeBrush(string key)
+    {
+        if (Resources.TryGetResource(key, ActualThemeVariant, out var resource) && resource is IBrush brush)
+        {
+            return brush;
+        }
+
+        return Brushes.Transparent;
+    }
+}

LanMountainDesktop/Views/SettingsWindow.Layout.cs

@@ -0,0 +1,529 @@
+using System;
+using Avalonia;
+using Avalonia.Controls;
+using Avalonia.Controls.Primitives;
+using Avalonia.Interactivity;
+using Avalonia.Layout;
+using Avalonia.Media;
+using FluentAvalonia.UI.Controls;
+using Line = Avalonia.Controls.Shapes.Line;
+
+namespace LanMountainDesktop.Views;
+
+public partial class SettingsWindow
+{
+    private void OnGridSizeSliderChanged(object? sender, RoutedEventArgs e)
+    {
+        var sliderValue = (int)Math.Round(GridSizeSlider.Value);
+        if (Math.Abs(GridSizeNumberBox.Value - sliderValue) > double.Epsilon)
+        {
+            GridSizeNumberBox.Value = sliderValue;
+        }
+
+        UpdateGridPreviewLayout();
+    }
+
+    private void OnGridSizeNumberBoxChanged(object? sender, NumberBoxValueChangedEventArgs e)
+    {
+        var numberBoxValue = (int)Math.Round(GridSizeNumberBox.Value);
+        if (Math.Abs(GridSizeSlider.Value - numberBoxValue) > double.Epsilon)
+        {
+            GridSizeSlider.Value = numberBoxValue;
+        }
+
+        UpdateGridPreviewLayout();
+    }
+
+    private void OnGridEdgeInsetSliderChanged(object? sender, RoutedEventArgs e)
+    {
+        if (_suppressGridInsetEvents)
+        {
+            return;
+        }
+
+        var value = (int)Math.Round(GridEdgeInsetSlider.Value);
+        SetPendingGridEdgeInsetPercent(value, updateSlider: false, updateNumberBox: true);
+        UpdateGridPreviewLayout();
+    }
+
+    private void OnGridEdgeInsetNumberBoxChanged(object? sender, NumberBoxValueChangedEventArgs e)
+    {
+        if (_suppressGridInsetEvents)
+        {
+            return;
+        }
+
+        var value = (int)Math.Round(GridEdgeInsetNumberBox.Value);
+        SetPendingGridEdgeInsetPercent(value, updateSlider: true, updateNumberBox: false);
+        UpdateGridPreviewLayout();
+    }
+
+    private void SetPendingGridEdgeInsetPercent(int percent, bool updateSlider, bool updateNumberBox)
+    {
+        var clamped = Math.Clamp(percent, MinEdgeInsetPercent, MaxEdgeInsetPercent);
+
+        _suppressGridInsetEvents = true;
+        try
+        {
+            if (updateSlider && Math.Abs(GridEdgeInsetSlider.Value - clamped) > double.Epsilon)
+            {
+                GridEdgeInsetSlider.Value = clamped;
+            }
+
+            if (updateNumberBox && Math.Abs(GridEdgeInsetNumberBox.Value - clamped) > double.Epsilon)
+            {
+                GridEdgeInsetNumberBox.Value = clamped;
+            }
+        }
+        finally
+        {
+            _suppressGridInsetEvents = false;
+        }
+    }
+
+    private void OnGridSpacingPresetSelectionChanged(object? sender, SelectionChangedEventArgs e)
+    {
+        if (_suppressGridSpacingEvents)
+        {
+            return;
+        }
+
+        UpdateGridPreviewLayout();
+    }
+
+    private void OnStatusBarSpacingModeChanged(object? sender, SelectionChangedEventArgs e)
+    {
+        if (_suppressStatusBarSpacingEvents)
+        {
+            return;
+        }
+
+        _statusBarSpacingMode = NormalizeStatusBarSpacingMode(
+            TryGetSelectedComboBoxTag(StatusBarSpacingModeComboBox) ?? _statusBarSpacingMode);
+        StatusBarSpacingCustomPanel.IsVisible = string.Equals(_statusBarSpacingMode, "Custom", StringComparison.OrdinalIgnoreCase);
+        UpdateWallpaperPreviewLayout();
+        UpdateGridPreviewLayout();
+        SchedulePersistSettings();
+    }
+
+    private void OnStatusBarSpacingSliderChanged(object? sender, RangeBaseValueChangedEventArgs e)
+    {
+        if (_suppressStatusBarSpacingEvents)
+        {
+            return;
+        }
+
+        var percent = (int)Math.Round(StatusBarSpacingSlider.Value);
+        SetStatusBarCustomSpacingPercent(percent, updateSlider: false, updateNumberBox: true);
+
+        if (string.Equals(_statusBarSpacingMode, "Custom", StringComparison.OrdinalIgnoreCase))
+        {
+            UpdateWallpaperPreviewLayout();
+            UpdateGridPreviewLayout();
+        }
+
+        SchedulePersistSettings();
+    }
+
+    private void OnStatusBarSpacingNumberBoxChanged(object? sender, NumberBoxValueChangedEventArgs e)
+    {
+        if (_suppressStatusBarSpacingEvents)
+        {
+            return;
+        }
+
+        var percent = (int)Math.Round(StatusBarSpacingNumberBox.Value);
+        SetStatusBarCustomSpacingPercent(percent, updateSlider: true, updateNumberBox: false);
+
+        if (string.Equals(_statusBarSpacingMode, "Custom", StringComparison.OrdinalIgnoreCase))
+        {
+            UpdateWallpaperPreviewLayout();
+            UpdateGridPreviewLayout();
+        }
+
+        SchedulePersistSettings();
+    }
+
+    private void SetStatusBarCustomSpacingPercent(int percent, bool updateSlider, bool updateNumberBox)
+    {
+        percent = Math.Clamp(percent, 0, 30);
+        _statusBarCustomSpacingPercent = percent;
+
+        _suppressStatusBarSpacingEvents = true;
+        try
+        {
+            if (updateSlider && Math.Abs(StatusBarSpacingSlider.Value - percent) > double.Epsilon)
+            {
+                StatusBarSpacingSlider.Value = percent;
+            }
+
+            if (updateNumberBox && Math.Abs(StatusBarSpacingNumberBox.Value - percent) > double.Epsilon)
+            {
+                StatusBarSpacingNumberBox.Value = percent;
+            }
+        }
+        finally
+        {
+            _suppressStatusBarSpacingEvents = false;
+        }
+    }
+
+    private void OnApplyGridSizeClick(object? sender, RoutedEventArgs e)
+    {
+        _gridSpacingPreset = NormalizeGridSpacingPreset(TryGetSelectedComboBoxTag(GridSpacingPresetComboBox) ?? _gridSpacingPreset);
+        _desktopEdgeInsetPercent = ResolvePendingGridEdgeInsetPercent();
+
+        var requested = (int)Math.Round(GridSizeNumberBox.Value);
+        if (requested <= 0)
+        {
+            requested = _targetShortSideCells;
+        }
+
+        _targetShortSideCells = Math.Clamp(requested, MinShortSideCells, MaxShortSideCells);
+
+        if (Math.Abs(GridSizeNumberBox.Value - _targetShortSideCells) > double.Epsilon)
+        {
+            GridSizeNumberBox.Value = _targetShortSideCells;
+        }
+
+        if (Math.Abs(GridSizeSlider.Value - _targetShortSideCells) > double.Epsilon)
+        {
+            GridSizeSlider.Value = _targetShortSideCells;
+        }
+
+        SetPendingGridEdgeInsetPercent(_desktopEdgeInsetPercent, updateSlider: true, updateNumberBox: true);
+        UpdateWallpaperPreviewLayout();
+        UpdateGridPreviewLayout();
+        PersistSettings();
+    }
+
+    private static double ResolveGridGapRatio(string preset)
+    {
+        return string.Equals(preset, "Compact", StringComparison.OrdinalIgnoreCase) ? 0.06 : 0.12;
+    }
+
+    private static double CalculateEdgeInset(double hostWidth, double hostHeight, int shortSideCells, int insetPercent)
+    {
+        if (hostWidth <= 1 || hostHeight <= 1)
+        {
+            return 0;
+        }
+
+        var cells = Math.Max(1, shortSideCells);
+        var shortSidePx = Math.Max(1, Math.Min(hostWidth, hostHeight));
+        var baseCell = shortSidePx / cells;
+        return Math.Clamp(baseCell * (Math.Clamp(insetPercent, MinEdgeInsetPercent, MaxEdgeInsetPercent) / 100d), 0, 80);
+    }
+
+    private static GridMetrics CalculateGridMetrics(double hostWidth, double hostHeight, int shortSideCells, double gapRatio, double edgeInsetPx)
+    {
+        if (hostWidth <= 1 || hostHeight <= 1)
+        {
+            return default;
+        }
+
+        var shortSide = Math.Max(1, shortSideCells);
+        var clampedGapRatio = Math.Max(0, gapRatio);
+        var inset = Math.Max(0, edgeInsetPx);
+        var availableWidth = Math.Max(1, hostWidth - inset * 2);
+        var availableHeight = Math.Max(1, hostHeight - inset * 2);
+
+        if (hostWidth >= hostHeight)
+        {
+            var rowCount = shortSide;
+            var denominator = rowCount + Math.Max(0, rowCount - 1) * clampedGapRatio;
+            if (denominator <= 0)
+            {
+                return default;
+            }
+
+            var cellSize = availableHeight / denominator;
+            var gapPx = cellSize * clampedGapRatio;
+            var pitch = cellSize + gapPx;
+            if (pitch <= 0)
+            {
+                return default;
+            }
+
+            var columnCount = Math.Max(1, (int)Math.Floor((availableWidth + gapPx) / pitch));
+            var gridWidth = columnCount * cellSize + Math.Max(0, columnCount - 1) * gapPx;
+            var gridHeight = rowCount * cellSize + Math.Max(0, rowCount - 1) * gapPx;
+            return new GridMetrics(columnCount, rowCount, cellSize, gapPx, inset, gridWidth, gridHeight);
+        }
+
+        var columnCountPortrait = shortSide;
+        var denominatorPortrait = columnCountPortrait + Math.Max(0, columnCountPortrait - 1) * clampedGapRatio;
+        if (denominatorPortrait <= 0)
+        {
+            return default;
+        }
+
+        var cellSizePortrait = availableWidth / denominatorPortrait;
+        var gapPxPortrait = cellSizePortrait * clampedGapRatio;
+        var pitchPortrait = cellSizePortrait + gapPxPortrait;
+        if (pitchPortrait <= 0)
+        {
+            return default;
+        }
+
+        var rowCountPortrait = Math.Max(1, (int)Math.Floor((availableHeight + gapPxPortrait) / pitchPortrait));
+        var gridWidthPortrait = columnCountPortrait * cellSizePortrait + Math.Max(0, columnCountPortrait - 1) * gapPxPortrait;
+        var gridHeightPortrait = rowCountPortrait * cellSizePortrait + Math.Max(0, rowCountPortrait - 1) * gapPxPortrait;
+        return new GridMetrics(columnCountPortrait, rowCountPortrait, cellSizePortrait, gapPxPortrait, inset, gridWidthPortrait, gridHeightPortrait);
+    }
+
+    private static int ClampComponentSpan(int requestedSpan, int axisCellCount)
+    {
+        return Math.Clamp(requestedSpan, 1, Math.Max(1, axisCellCount));
+    }
+
+    private static int ClampGridIndex(int requestedIndex, int axisCellCount)
+    {
+        return Math.Clamp(requestedIndex, 0, Math.Max(0, axisCellCount - 1));
+    }
+
+    private static void PlaceStatusBarComponent(Control component, int column, int requestedColumnSpan, int totalColumns)
+    {
+        var clampedColumn = ClampGridIndex(column, totalColumns);
+        var availableColumns = Math.Max(1, totalColumns - clampedColumn);
+        Grid.SetRow(component, StatusBarRowIndex);
+        Grid.SetColumn(component, clampedColumn);
+        Grid.SetColumnSpan(component, ClampComponentSpan(requestedColumnSpan, availableColumns));
+    }
+
+    private void UpdateGridPreviewLayout()
+    {
+        var previewShortSideCells = (int)Math.Round(GridSizeSlider.Value);
+        if (previewShortSideCells < MinShortSideCells || previewShortSideCells > MaxShortSideCells)
+        {
+            previewShortSideCells = _targetShortSideCells;
+        }
+
+        var desktopWidth = Math.Max(1, DesktopHost.Bounds.Width > 1 ? DesktopHost.Bounds.Width : Bounds.Width);
+        var desktopHeight = Math.Max(1, DesktopHost.Bounds.Height > 1 ? DesktopHost.Bounds.Height : Bounds.Height);
+        var aspectRatio = desktopWidth / desktopHeight;
+        var availableWidth = Math.Max(100, GridPreviewHost.Bounds.Width);
+        var framePadding = GridPreviewFrame.Padding;
+        var horizontalPadding = framePadding.Left + framePadding.Right;
+        var verticalPadding = framePadding.Top + framePadding.Bottom;
+
+        var gridPreviewWidth = availableWidth;
+        var gridPreviewHeight = gridPreviewWidth / aspectRatio;
+        GridPreviewFrame.Width = gridPreviewWidth;
+        GridPreviewFrame.Height = gridPreviewHeight;
+
+        var innerWidth = Math.Max(1, gridPreviewWidth - horizontalPadding);
+        var innerHeight = Math.Max(1, gridPreviewHeight - verticalPadding);
+        var preset = NormalizeGridSpacingPreset(TryGetSelectedComboBoxTag(GridSpacingPresetComboBox) ?? _gridSpacingPreset);
+        var gapRatio = ResolveGridGapRatio(preset);
+        var edgeInset = CalculateEdgeInset(innerWidth, innerHeight, previewShortSideCells, ResolvePendingGridEdgeInsetPercent());
+        var gridMetrics = CalculateGridMetrics(innerWidth, innerHeight, previewShortSideCells, gapRatio, edgeInset);
+        if (gridMetrics.CellSize <= 0)
+        {
+            return;
+        }
+
+        _currentDesktopCellSize = gridMetrics.CellSize;
+        GridPreviewGrid.Margin = new Thickness(gridMetrics.EdgeInsetPx);
+        GridPreviewGrid.RowSpacing = gridMetrics.GapPx;
+        GridPreviewGrid.ColumnSpacing = gridMetrics.GapPx;
+        GridPreviewGrid.Width = gridMetrics.GridWidthPx;
+        GridPreviewGrid.Height = gridMetrics.GridHeightPx;
+        GridPreviewLinesCanvas.Margin = new Thickness(gridMetrics.EdgeInsetPx);
+        GridPreviewGrid.RowDefinitions.Clear();
+        GridPreviewGrid.ColumnDefinitions.Clear();
+
+        for (var row = 0; row < gridMetrics.RowCount; row++)
+        {
+            GridPreviewGrid.RowDefinitions.Add(new RowDefinition(new GridLength(gridMetrics.CellSize, GridUnitType.Pixel)));
+        }
+
+        for (var col = 0; col < gridMetrics.ColumnCount; col++)
+        {
+            GridPreviewGrid.ColumnDefinitions.Add(new ColumnDefinition(new GridLength(gridMetrics.CellSize, GridUnitType.Pixel)));
+        }
+
+        PlaceStatusBarComponent(GridPreviewTopStatusBarHost, 0, gridMetrics.ColumnCount, gridMetrics.ColumnCount);
+
+        var taskbarRow = gridMetrics.RowCount - 1;
+        Grid.SetRow(GridPreviewBottomTaskbarContainer, taskbarRow);
+        Grid.SetColumn(GridPreviewBottomTaskbarContainer, 0);
+        Grid.SetColumnSpan(GridPreviewBottomTaskbarContainer, gridMetrics.ColumnCount);
+
+        ApplyGridPreviewWidgetSizing(gridMetrics.CellSize);
+        ApplyStatusBarComponentSpacingForPanel(GridPreviewTopStatusComponentsPanel, gridMetrics.CellSize);
+        UpdateGridEdgeInsetComputedPxText(gridMetrics.CellSize);
+        GridInfoTextBlock.Text = Lf("settings.grid.info_format", "Grid: {0} cols x {1} rows | cell {2:F1}px (1:1)", gridMetrics.ColumnCount, gridMetrics.RowCount, gridMetrics.CellSize);
+
+        DrawGridPreviewLines(gridMetrics);
+    }
+
+    private void DrawGridPreviewLines(GridMetrics gridMetrics)
+    {
+        var viewportBackground = GridPreviewViewport.Background as SolidColorBrush;
+        var backgroundColor = viewportBackground?.Color ?? Color.Parse("#30111827");
+        var luminance = CalculateRelativeLuminance(backgroundColor);
+        var lineColor = luminance >= LightBackgroundLuminanceThreshold ? Color.Parse("#80000000") : Color.Parse("#80FFFFFF");
+
+        GridPreviewLinesCanvas.Children.Clear();
+        GridPreviewLinesCanvas.Width = gridMetrics.GridWidthPx;
+        GridPreviewLinesCanvas.Height = gridMetrics.GridHeightPx;
+
+        var dashLength = gridMetrics.CellSize * 0.3;
+        var gapLength = gridMetrics.CellSize * 0.2;
+
+        for (var row = 0; row <= gridMetrics.RowCount; row++)
+        {
+            var y = row == gridMetrics.RowCount ? gridMetrics.GridHeightPx : row * gridMetrics.Pitch;
+            GridPreviewLinesCanvas.Children.Add(new Line
+            {
+                StartPoint = new Point(0, y),
+                EndPoint = new Point(gridMetrics.GridWidthPx, y),
+                Stroke = new SolidColorBrush(lineColor),
+                StrokeThickness = 1,
+                StrokeDashArray = new Avalonia.Collections.AvaloniaList<double> { dashLength, gapLength },
+                IsHitTestVisible = false
+            });
+        }
+
+        for (var col = 0; col <= gridMetrics.ColumnCount; col++)
+        {
+            var x = col == gridMetrics.ColumnCount ? gridMetrics.GridWidthPx : col * gridMetrics.Pitch;
+            GridPreviewLinesCanvas.Children.Add(new Line
+            {
+                StartPoint = new Point(x, 0),
+                EndPoint = new Point(x, gridMetrics.GridHeightPx),
+                Stroke = new SolidColorBrush(lineColor),
+                StrokeThickness = 1,
+                StrokeDashArray = new Avalonia.Collections.AvaloniaList<double> { dashLength, gapLength },
+                IsHitTestVisible = false
+            });
+        }
+    }
+
+    private void ApplyGridPreviewWidgetSizing(double cellSize)
+    {
+        var previewTaskbarCell = Math.Clamp(cellSize * 0.74, 10, 30);
+        var iconSize = Math.Clamp(cellSize * 0.35, 8, 16);
+
+        GridPreviewTopStatusBarHost.Padding = new Thickness(0);
+        GridPreviewBottomTaskbarContainer.Margin = new Thickness(0);
+        GridPreviewBottomTaskbarContainer.CornerRadius = new CornerRadius(Math.Clamp(cellSize * 0.45, 16, 32));
+        GridPreviewBottomTaskbarContainer.Padding = new Thickness(Math.Clamp(cellSize * 0.06, 1, 4));
+
+        GridPreviewBackButtonTextBlock.FontSize = Math.Clamp(cellSize * 0.19, 5, 13);
+        GridPreviewComponentLibraryTextBlock.FontSize = Math.Clamp(cellSize * 0.18, 5, 12);
+        GridPreviewComponentLibraryIcon.FontSize = iconSize;
+        GridPreviewBackButtonVisual.MinHeight = previewTaskbarCell;
+        GridPreviewBackButtonVisual.MinWidth = Math.Clamp(cellSize * 2.1, 30, 120);
+        GridPreviewComponentLibraryVisual.MinHeight = previewTaskbarCell;
+        GridPreviewComponentLibraryVisual.MinWidth = Math.Clamp(cellSize * 2.0, 28, 110);
+        GridPreviewSettingsButtonIcon.Width = Math.Clamp(previewTaskbarCell * 0.42, 6, 14);
+        GridPreviewSettingsButtonIcon.Height = Math.Clamp(previewTaskbarCell * 0.42, 6, 14);
+    }
+
+    private void UpdateWallpaperPreviewLayout()
+    {
+        if (_isUpdatingWallpaperPreviewLayout)
+        {
+            return;
+        }
+
+        _isUpdatingWallpaperPreviewLayout = true;
+        try
+        {
+            var desktopWidth = Math.Max(1, DesktopHost.Bounds.Width > 1 ? DesktopHost.Bounds.Width : Bounds.Width);
+            var desktopHeight = Math.Max(1, DesktopHost.Bounds.Height > 1 ? DesktopHost.Bounds.Height : Bounds.Height);
+            var aspectRatio = desktopWidth / desktopHeight;
+
+            var availableWidth = Math.Max(100, WallpaperPreviewHost.Bounds.Width);
+            var availableHeight = WallpaperPreviewHost.Bounds.Height < 120 ? double.PositiveInfinity : WallpaperPreviewHost.Bounds.Height;
+
+            var framePadding = WallpaperPreviewFrame.Padding;
+            var horizontalPadding = framePadding.Left + framePadding.Right;
+            var verticalPadding = framePadding.Top + framePadding.Bottom;
+
+            var previewWidth = Math.Min(availableWidth, WallpaperPreviewMaxWidth);
+            var previewHeight = previewWidth / aspectRatio;
+            if (double.IsFinite(availableHeight) && previewHeight > availableHeight)
+            {
+                previewHeight = availableHeight;
+                previewWidth = previewHeight * aspectRatio;
+            }
+
+            WallpaperPreviewFrame.Width = previewWidth;
+            WallpaperPreviewFrame.Height = previewHeight;
+
+            var innerWidth = Math.Max(1, previewWidth - horizontalPadding);
+            var innerHeight = Math.Max(1, previewHeight - verticalPadding);
+            var gapRatio = ResolveGridGapRatio(_gridSpacingPreset);
+            var edgeInset = CalculateEdgeInset(innerWidth, innerHeight, _targetShortSideCells, _desktopEdgeInsetPercent);
+            var gridMetrics = CalculateGridMetrics(innerWidth, innerHeight, _targetShortSideCells, gapRatio, edgeInset);
+            if (gridMetrics.CellSize <= 0)
+            {
+                return;
+            }
+
+            WallpaperPreviewGrid.Margin = new Thickness(gridMetrics.EdgeInsetPx);
+            WallpaperPreviewGrid.RowSpacing = gridMetrics.GapPx;
+            WallpaperPreviewGrid.ColumnSpacing = gridMetrics.GapPx;
+            WallpaperPreviewGrid.Width = gridMetrics.GridWidthPx;
+            WallpaperPreviewGrid.Height = gridMetrics.GridHeightPx;
+            WallpaperPreviewGrid.RowDefinitions.Clear();
+            WallpaperPreviewGrid.ColumnDefinitions.Clear();
+
+            for (var row = 0; row < gridMetrics.RowCount; row++)
+            {
+                WallpaperPreviewGrid.RowDefinitions.Add(new RowDefinition(new GridLength(gridMetrics.CellSize, GridUnitType.Pixel)));
+            }
+
+            for (var col = 0; col < gridMetrics.ColumnCount; col++)
+            {
+                WallpaperPreviewGrid.ColumnDefinitions.Add(new ColumnDefinition(new GridLength(gridMetrics.CellSize, GridUnitType.Pixel)));
+            }
+
+            PlaceStatusBarComponent(WallpaperPreviewTopStatusBarHost, 0, gridMetrics.ColumnCount, gridMetrics.ColumnCount);
+
+            var taskbarRow = gridMetrics.RowCount - 1;
+            Grid.SetRow(WallpaperPreviewBottomTaskbarContainer, taskbarRow);
+            Grid.SetColumn(WallpaperPreviewBottomTaskbarContainer, 0);
+            Grid.SetColumnSpan(WallpaperPreviewBottomTaskbarContainer, gridMetrics.ColumnCount);
+
+            ApplyTopStatusComponentVisibility();
+            ApplyTaskbarActionVisibility(GetCurrentTaskbarContext());
+            ApplyPreviewWidgetSizing(gridMetrics.CellSize);
+            ApplyStatusBarComponentSpacingForPanel(WallpaperPreviewTopStatusComponentsPanel, gridMetrics.CellSize);
+        }
+        finally
+        {
+            _isUpdatingWallpaperPreviewLayout = false;
+        }
+    }
+
+    private void ApplyPreviewWidgetSizing(double cellSize)
+    {
+        var previewTaskbarCell = Math.Clamp(cellSize * 0.74, 10, 28);
+        var previewTextSize = Math.Clamp(previewTaskbarCell * 0.38, 7, 14);
+        var previewIconSize = Math.Clamp(previewTaskbarCell * 0.46, 8, 16);
+        var previewInset = Math.Clamp(previewTaskbarCell * 0.20, 2, 6);
+        var previewContentSpacing = Math.Clamp(previewTaskbarCell * 0.20, 2, 6);
+
+        WallpaperPreviewTopStatusBarHost.Margin = new Thickness(0);
+        WallpaperPreviewTopStatusBarHost.Padding = new Thickness(0);
+        WallpaperPreviewBottomTaskbarContainer.Margin = new Thickness(0);
+        WallpaperPreviewBottomTaskbarContainer.CornerRadius = new CornerRadius(Math.Clamp(cellSize * 0.45, 6, 14));
+        WallpaperPreviewBottomTaskbarContainer.Padding = new Thickness(previewInset);
+
+        WallpaperPreviewClockWidget.ApplyCellSize(cellSize);
+        WallpaperPreviewBackButtonTextBlock.FontSize = previewTextSize;
+        WallpaperPreviewComponentLibraryTextBlock.FontSize = previewTextSize;
+        WallpaperPreviewBackButtonVisual.Spacing = previewContentSpacing;
+        WallpaperPreviewComponentLibraryVisual.Spacing = previewContentSpacing;
+        WallpaperPreviewBackButtonVisual.MinHeight = previewTaskbarCell;
+        WallpaperPreviewBackButtonVisual.MinWidth = Math.Clamp(cellSize * 2.1, 30, 120);
+        WallpaperPreviewComponentLibraryVisual.MinHeight = previewTaskbarCell;
+        WallpaperPreviewComponentLibraryVisual.MinWidth = Math.Clamp(cellSize * 2.0, 28, 110);
+        WallpaperPreviewSettingsButtonIcon.Width = previewIconSize;
+        WallpaperPreviewSettingsButtonIcon.Height = previewIconSize;
+    }
+}

LanMountainDesktop/Views/SettingsWindow.Localization.cs

@@ -0,0 +1,185 @@
+using System;
+using System.Linq;
+using Avalonia.Controls;
+
+namespace LanMountainDesktop.Views;
+
+public partial class SettingsWindow
+{
+    private void InitializeLocalization(string? languageCode)
+    {
+        _languageCode = _localizationService.NormalizeLanguageCode(languageCode);
+        _suppressLanguageSelectionEvents = true;
+        LanguageComboBox.SelectedIndex = string.Equals(_languageCode, "en-US", StringComparison.OrdinalIgnoreCase) ? 1 : 0;
+        _suppressLanguageSelectionEvents = false;
+    }
+
+    private string L(string key, string fallback)
+    {
+        return _localizationService.GetString(_languageCode, key, fallback);
+    }
+
+    private string Lf(string key, string fallback, params object[] args)
+    {
+        var template = L(key, fallback);
+        return string.Format(template, args);
+    }
+
+    private string GetLanguageDisplayName(string languageCode)
+    {
+        return string.Equals(languageCode, "en-US", StringComparison.OrdinalIgnoreCase)
+            ? L("settings.region.language_en", "English")
+            : L("settings.region.language_zh", "Chinese");
+    }
+
+    private string GetLocalizedPlacementDisplayName(WallpaperPlacement placement)
+    {
+        return placement switch
+        {
+            WallpaperPlacement.Fill => L("placement.fill", "Fill"),
+            WallpaperPlacement.Fit => L("placement.fit", "Fit"),
+            WallpaperPlacement.Stretch => L("placement.stretch", "Stretch"),
+            WallpaperPlacement.Center => L("placement.center", "Center"),
+            WallpaperPlacement.Tile => L("placement.tile", "Tile"),
+            _ => L("placement.fill", "Fill")
+        };
+    }
+
+    private void ApplyLocalization()
+    {
+        Title = L("settings.title", "Settings");
+        WindowTitleTextBlock.Text = L("settings.title", "Settings");
+        WindowSubtitleTextBlock.Text = L("settings.footer", "LanMountainDesktop Settings");
+
+        SettingsNavWallpaperItem.Content = L("settings.nav.wallpaper", "Wallpaper");
+        SettingsNavGridItem.Content = L("settings.nav.grid", "Grid");
+        SettingsNavColorItem.Content = L("settings.nav.color", "Color");
+        SettingsNavStatusBarItem.Content = L("settings.nav.status_bar", "Status Bar");
+        SettingsNavWeatherItem.Content = L("settings.nav.weather", "Weather");
+        SettingsNavRegionItem.Content = L("settings.nav.region", "Region");
+        SettingsNavUpdateItem.Content = L("settings.nav.update", "Update");
+        SettingsNavAboutItem.Content = L("settings.nav.about", "About");
+        SettingsNavLauncherItem.Content = L("settings.nav.launcher", "App Launcher");
+        SettingsNavPluginsItem.Content = L("settings.nav.plugins", "Plugins");
+
+        WallpaperPanelTitleTextBlock.Text = L("settings.wallpaper.title", "Personalize your wallpaper");
+        WallpaperPlacementSettingsExpander.Header = L("settings.wallpaper.placement_label", "Placement");
+        WallpaperPlacementSettingsExpander.Description = L("settings.wallpaper.placement_desc", "Adjust how the image fits on the desktop.");
+        PickWallpaperButton.Content = L("settings.wallpaper.pick_button", "Browse");
+        ClearWallpaperButton.Content = L("settings.wallpaper.clear_button", "Reset");
+        WallpaperPreviewBackButtonTextBlock.Text = L("button.back_to_windows", "Back to Windows");
+        WallpaperPreviewComponentLibraryTextBlock.Text = L("button.component_library", "Edit Desktop");
+        GridPreviewBackButtonTextBlock.Text = L("button.back_to_windows", "Back to Windows");
+        GridPreviewComponentLibraryTextBlock.Text = L("button.component_library", "Edit Desktop");
+
+        GridPanelTitleTextBlock.Text = L("settings.grid.title", "Grid Layout");
+        GridSpacingSettingsExpander.Header = L("settings.grid.spacing_label", "Grid Spacing");
+        GridSpacingRelaxedComboBoxItem.Content = L("settings.grid.spacing_relaxed", "Relaxed");
+        GridSpacingCompactComboBoxItem.Content = L("settings.grid.spacing_compact", "Compact");
+        GridEdgeInsetSettingsExpander.Header = L("settings.grid.edge_inset_label", "Screen Inset");
+        ApplyGridButton.Content = L("settings.grid.apply_button", "Apply");
+        UpdateGridEdgeInsetComputedPxText(_currentDesktopCellSize);
+
+        ColorPanelTitleTextBlock.Text = L("settings.color.title", "Color");
+        ThemeModeSettingsExpander.Header = L("settings.color.day_night_label", "Day/Night");
+        RecommendedColorsLabelTextBlock.Text = L("settings.color.recommended_label", "Recommended Colors");
+        SystemMonetColorsLabelTextBlock.Text = L("settings.color.system_monet_label", "System Monet Colors");
+        RefreshMonetColorsButton.Content = L("settings.color.refresh_button", "Refresh");
+
+        StatusBarPanelTitleTextBlock.Text = L("settings.status_bar.title", "Status Bar");
+        StatusBarClockSettingsExpander.Header = L("settings.status_bar.clock_header", "Clock");
+        StatusBarSpacingSettingsExpander.Header = L("settings.status_bar.spacing_header", "Component Spacing");
+        StatusBarSpacingSettingsExpander.Description = L("settings.status_bar.spacing_desc", "Adjust spacing between status bar components.");
+        StatusBarSpacingModeCompactItem.Content = L("settings.status_bar.spacing_mode_compact", "Compact");
+        StatusBarSpacingModeRelaxedItem.Content = L("settings.status_bar.spacing_mode_relaxed", "Relaxed");
+        StatusBarSpacingModeCustomItem.Content = L("settings.status_bar.spacing_mode_custom", "Custom");
+        StatusBarSpacingCustomPanel.Content = L("settings.status_bar.spacing_custom_label", "Custom spacing (%)");
+
+        RegionPanelTitleTextBlock.Text = L("settings.region.title", "Region");
+        LanguageSettingsExpander.Header = L("settings.region.language_header", "Language");
+        LanguageSettingsExpander.Description = L("settings.region.language_desc", "Select application language. Changes apply immediately.");
+        LanguageChineseItem.Content = L("settings.region.language_zh", "Chinese");
+        LanguageEnglishItem.Content = L("settings.region.language_en", "English");
+        TimeZoneSettingsExpander.Header = L("settings.region.timezone_header", "Time Zone");
+        TimeZoneSettingsExpander.Description = L("settings.region.timezone_desc", "Select a time zone. Clock and calendar widgets will follow this zone.");
+
+        LauncherSettingsPanelTitleTextBlock.Text = L("settings.launcher.title", "App Launcher");
+        LauncherHiddenItemsSettingsExpander.Header = L("settings.launcher.hidden_header", "Hidden Items");
+        LauncherHiddenItemsSettingsExpander.Description = L("settings.launcher.hidden_desc", "Review hidden launcher entries and show them again.");
+        LauncherHiddenItemsDescriptionTextBlock.Text = L("settings.launcher.hidden_hint", "Right-click an icon in launcher to hide it. Hidden entries appear here.");
+        LauncherHiddenItemsEmptyTextBlock.Text = L("settings.launcher.hidden_empty", "No hidden items.");
+
+        PluginSettingsPanelTitleTextBlock.Text = L("settings.plugins.title", "Plugins");
+        PluginSystemSettingsExpander.Header = L("settings.plugins.runtime_header", "Plugin Runtime");
+        PluginSystemSettingsExpander.Description = L("settings.plugins.runtime_desc", "Manage plugin loading and backend isolation.");
+        PluginSystemDescriptionTextBlock.Text = L("settings.plugins.runtime_hint", "This page will host installed plugin management, permission review, and sandboxed backend runtime controls.");
+        PluginSystemStatusTextBlock.Text = L("settings.plugins.runtime_status", "Plugin management UI is not connected yet. Next step is wiring the loader, permissions, and worker isolation state into this panel.");
+
+        AboutPanelTitleTextBlock.Text = L("settings.about.title", "About");
+        VersionTextBlock.Text = Lf("settings.about.version_format", "Version: {0}", GetAppVersionText());
+        CodeNameTextBlock.Text = Lf("settings.about.codename_format", "Code Name: {0}", AppCodeName);
+        FontInfoTextBlock.Text = Lf("settings.about.font_format", "Font: {0}", AppFontName);
+        AboutStartupSettingsExpander.Header = L("settings.about.startup_header", "Windows Startup");
+        AboutStartupSettingsExpander.Description = L("settings.about.startup_desc", "Launch the app automatically when signing in to Windows.");
+
+        var placementItems = WallpaperPlacementComboBox.Items.OfType<ComboBoxItem>().ToList();
+        if (placementItems.Count >= 5)
+        {
+            placementItems[0].Content = L("placement.fill", "Fill");
+            placementItems[1].Content = L("placement.fit", "Fit");
+            placementItems[2].Content = L("placement.stretch", "Stretch");
+            placementItems[3].Content = L("placement.center", "Center");
+            placementItems[4].Content = L("placement.tile", "Tile");
+        }
+
+        ApplyUpdateLocalization();
+        UpdateWallpaperDisplay();
+        RenderLauncherHiddenItemsList();
+    }
+
+    private string GetLocalizedTimeZoneDisplayName(TimeZoneInfo timeZone)
+    {
+        var offset = timeZone.GetUtcOffset(DateTime.UtcNow);
+        var sign = offset >= TimeSpan.Zero ? "+" : "-";
+        var hours = Math.Abs(offset.Hours);
+        var minutes = Math.Abs(offset.Minutes);
+        var name = string.IsNullOrWhiteSpace(timeZone.StandardName) ? timeZone.DisplayName : timeZone.StandardName;
+
+        if (string.Equals(_languageCode, "zh-CN", StringComparison.OrdinalIgnoreCase) &&
+            ZhTimeZoneNames.TryGetValue(timeZone.Id, out var localizedName))
+        {
+            name = localizedName;
+        }
+
+        if (string.IsNullOrWhiteSpace(name))
+        {
+            name = timeZone.Id;
+        }
+
+        return $"(UTC{sign}{hours:D2}:{minutes:D2}) {name}";
+    }
+
+    private static string GetAppVersionText()
+    {
+        var version = typeof(MainWindow).Assembly.GetName().Version;
+        if (version is null || version.Major < 0 || version.Minor < 0 || version.Build < 0)
+        {
+            return FallbackAppVersion;
+        }
+
+        return $"{version.Major}.{version.Minor}.{version.Build}";
+    }
+
+    private void OnLanguageSelectionChanged(object? sender, SelectionChangedEventArgs e)
+    {
+        if (_suppressLanguageSelectionEvents || LanguageComboBox.SelectedItem is not ComboBoxItem item)
+        {
+            return;
+        }
+
+        _languageCode = _localizationService.NormalizeLanguageCode(item.Tag as string);
+        ApplyLocalization();
+        ThemeColorStatusTextBlock.Text = Lf("settings.region.applied_format", "Language switched to: {0}", GetLanguageDisplayName(_languageCode));
+        PersistSettings();
+    }
+}

LanMountainDesktop/Views/SettingsWindow.State.cs

@@ -0,0 +1,76 @@
+using System;
+using System.Collections.Generic;
+using Avalonia.Media.Imaging;
+using LanMountainDesktop.Models;
+using LanMountainDesktop.Services;
+using LanMountainDesktop.Views.Components;
+
+namespace LanMountainDesktop.Views;
+
+public partial class SettingsWindow
+{
+    private const int StatusBarRowIndex = 0;
+    private const string UpdateChannelStable = "Stable";
+    private const string UpdateChannelPreview = "Preview";
+    private const string AppCodeName = "Administrate";
+    private const string AppFontName = "MiSans";
+    private const string FallbackAppVersion = "1.0.0";
+
+    private static readonly IReadOnlyDictionary<string, string> ZhTimeZoneNames =
+        new Dictionary<string, string>(StringComparer.OrdinalIgnoreCase)
+        {
+            ["China Standard Time"] = "中国标准时间",
+            ["Asia/Shanghai"] = "中国标准时间",
+            ["Tokyo Standard Time"] = "日本标准时间",
+            ["Asia/Tokyo"] = "日本标准时间",
+            ["Pacific Standard Time"] = "太平洋标准时间",
+            ["America/Los_Angeles"] = "太平洋标准时间",
+            ["Eastern Standard Time"] = "美国东部标准时间",
+            ["America/New_York"] = "美国东部标准时间",
+            ["Central European Standard Time"] = "中欧标准时间",
+            ["Europe/Berlin"] = "中欧标准时间",
+            ["GMT Standard Time"] = "格林威治标准时间",
+            ["Europe/London"] = "格林威治标准时间",
+            ["UTC"] = "协调世界时",
+            ["Etc/UTC"] = "协调世界时"
+        };
+
+    private enum LauncherEntryKind
+    {
+        Folder,
+        Shortcut
+    }
+
+    private sealed record LauncherHiddenItemToken(LauncherEntryKind Kind, string Key);
+
+    private sealed record LauncherHiddenItemView(
+        LauncherEntryKind Kind,
+        string Key,
+        string DisplayName,
+        string Monogram,
+        Bitmap? IconBitmap);
+
+    private readonly Dictionary<string, Bitmap> _launcherIconCache = new(StringComparer.OrdinalIgnoreCase);
+
+    private ClockDisplayFormat _clockDisplayFormat = ClockDisplayFormat.HourMinuteSecond;
+    private bool _suppressStatusBarToggleEvents;
+
+    private bool _autoCheckUpdates = true;
+    private string _updateChannel = UpdateChannelStable;
+    private bool _suppressUpdateOptionEvents;
+    private bool _isCheckingUpdates;
+    private bool _isDownloadingUpdate;
+    private string _latestReleaseVersionText = "-";
+    private DateTimeOffset? _latestReleasePublishedAt;
+    private string _updateStatusText = string.Empty;
+    private string _updateDownloadProgressText = string.Empty;
+    private double _updateDownloadProgressPercent;
+    private GitHubReleaseAsset? _latestReleaseInstallerAsset;
+    private string? _downloadedUpdateInstallerPath;
+    private IDisposable? _persistSettingsDebounceTimer;
+
+    private bool IncludePrereleaseUpdates => string.Equals(
+        _updateChannel,
+        UpdateChannelPreview,
+        StringComparison.OrdinalIgnoreCase);
+}

LanMountainDesktop/Views/SettingsWindow.Update.cs

@@ -0,0 +1,340 @@
+using System;
+using System.Diagnostics;
+using System.IO;
+using System.Threading.Tasks;
+using Avalonia;
+using Avalonia.Controls;
+using Avalonia.Controls.ApplicationLifetimes;
+using Avalonia.Interactivity;
+using Avalonia.Threading;
+using LanMountainDesktop.Models;
+using LanMountainDesktop.Services;
+
+namespace LanMountainDesktop.Views;
+
+public partial class SettingsWindow
+{
+    private void InitializeUpdateSettings(AppSettingsSnapshot snapshot)
+    {
+        _autoCheckUpdates = snapshot.AutoCheckUpdates;
+        _updateChannel = NormalizeUpdateChannel(snapshot.UpdateChannel, snapshot.IncludePrereleaseUpdates);
+        _latestReleaseVersionText = "-";
+        _latestReleasePublishedAt = null;
+        _updateDownloadProgressPercent = 0;
+        _updateDownloadProgressText = L("settings.update.download_progress_idle", "Download progress: -");
+        _updateStatusText = L("settings.update.status_ready", "Ready to check for updates.");
+        _latestReleaseInstallerAsset = null;
+        _downloadedUpdateInstallerPath = null;
+
+        _suppressUpdateOptionEvents = true;
+        try
+        {
+            AutoCheckUpdatesToggleSwitch.IsChecked = _autoCheckUpdates;
+            UpdateChannelChipListBox.SelectedIndex = IncludePrereleaseUpdates ? 1 : 0;
+        }
+        finally
+        {
+            _suppressUpdateOptionEvents = false;
+        }
+
+        UpdateUpdatePanelState();
+    }
+
+    private void ApplyUpdateLocalization()
+    {
+        UpdatePanelTitleTextBlock.Text = L("settings.update.title", "Update");
+        UpdateCurrentVersionLabelTextBlock.Text = L("settings.update.current_version_label", "Current Version");
+        UpdateLatestVersionLabelTextBlock.Text = L("settings.update.latest_version_label", "Latest Release");
+        UpdatePublishedAtLabelTextBlock.Text = L("settings.update.published_at_label", "Published At");
+        UpdateOptionsSettingsExpander.Header = L("settings.update.options_header", "Update Options");
+        UpdateOptionsSettingsExpander.Description = L("settings.update.options_desc", "Configure update checks and release channel.");
+        AutoCheckUpdatesToggleSwitch.Content = L("settings.update.auto_check_toggle", "Automatically check for updates on startup");
+        UpdateChannelLabelTextBlock.Text = L("settings.update.channel_label", "Update Channel");
+        UpdateChannelStableChipItem.Content = L("settings.update.channel_stable", "Stable");
+        UpdateChannelPreviewChipItem.Content = L("settings.update.channel_preview", "Preview");
+        UpdateActionsSettingsExpander.Header = L("settings.update.actions_header", "Update Actions");
+        UpdateActionsSettingsExpander.Description = L("settings.update.actions_desc", "Check releases, download installer, and start update.");
+        CheckForUpdatesButton.Content = L("settings.update.check_button", "Check for Updates");
+        DownloadAndInstallUpdateButton.Content = L("settings.update.download_install_button", "Download & Install");
+        UpdateUpdatePanelState();
+    }
+
+    private async void OnCheckForUpdatesClick(object? sender, RoutedEventArgs e)
+    {
+        await CheckForUpdatesAsync(false);
+    }
+
+    private async void OnDownloadAndInstallUpdateClick(object? sender, RoutedEventArgs e)
+    {
+        if (_isCheckingUpdates || _isDownloadingUpdate)
+        {
+            return;
+        }
+
+        if (_latestReleaseInstallerAsset is null)
+        {
+            await CheckForUpdatesAsync(false);
+        }
+
+        if (_latestReleaseInstallerAsset is not null)
+        {
+            await DownloadAndInstallUpdateAsync(_latestReleaseInstallerAsset);
+        }
+    }
+
+    private void OnAutoCheckUpdatesToggled(object? sender, RoutedEventArgs e)
+    {
+        if (_suppressUpdateOptionEvents)
+        {
+            return;
+        }
+
+        _autoCheckUpdates = AutoCheckUpdatesToggleSwitch.IsChecked == true;
+        PersistSettings();
+    }
+
+    private void OnUpdateChannelSelectionChanged(object? sender, SelectionChangedEventArgs e)
+    {
+        if (_suppressUpdateOptionEvents)
+        {
+            return;
+        }
+
+        var selectedChannel = UpdateChannelChipListBox.SelectedIndex == 1 ? UpdateChannelPreview : UpdateChannelStable;
+        if (string.Equals(_updateChannel, selectedChannel, StringComparison.OrdinalIgnoreCase))
+        {
+            return;
+        }
+
+        _updateChannel = selectedChannel;
+        _latestReleaseInstallerAsset = null;
+        _latestReleaseVersionText = "-";
+        _latestReleasePublishedAt = null;
+        _downloadedUpdateInstallerPath = null;
+        _updateStatusText = Lf("settings.update.status_channel_changed_format", "Update channel switched to {0}. Please check again.", GetLocalizedUpdateChannelName(_updateChannel));
+        PersistSettings();
+        UpdateUpdatePanelState();
+    }
+
+    private async Task CheckForUpdatesAsync(bool silentWhenNoUpdate)
+    {
+        if (_isCheckingUpdates || _isDownloadingUpdate)
+        {
+            return;
+        }
+
+        if (!OperatingSystem.IsWindows())
+        {
+            _updateStatusText = L("settings.update.status_windows_only", "Automatic installer update is currently available only on Windows.");
+            UpdateUpdatePanelState();
+            return;
+        }
+
+        _isCheckingUpdates = true;
+        _updateStatusText = L("settings.update.status_checking", "Checking GitHub releases...");
+        _updateDownloadProgressPercent = 0;
+        _updateDownloadProgressText = L("settings.update.download_progress_idle", "Download progress: -");
+        UpdateUpdatePanelState();
+
+        try
+        {
+            if (!Version.TryParse(GetAppVersionText(), out var currentVersion))
+            {
+                currentVersion = new Version(0, 0, 0);
+            }
+
+            var result = await _releaseUpdateService.CheckForUpdatesAsync(currentVersion, IncludePrereleaseUpdates);
+            if (!result.Success)
+            {
+                _latestReleaseInstallerAsset = null;
+                _latestReleaseVersionText = "-";
+                _latestReleasePublishedAt = null;
+                _downloadedUpdateInstallerPath = null;
+                _updateStatusText = Lf("settings.update.status_check_failed_format", "Update check failed: {0}", result.ErrorMessage ?? L("common.unknown", "Unknown error"));
+                return;
+            }
+
+            _latestReleaseInstallerAsset = result.PreferredAsset;
+            _latestReleaseVersionText = result.LatestVersionText;
+            _latestReleasePublishedAt = result.Release?.PublishedAt;
+            _downloadedUpdateInstallerPath = null;
+
+            if (!result.IsUpdateAvailable)
+            {
+                _latestReleaseInstallerAsset = null;
+                _updateStatusText = silentWhenNoUpdate
+                    ? L("settings.update.status_up_to_date", "You are already on the latest version.")
+                    : L("settings.update.status_up_to_date", "You are already on the latest version.");
+                return;
+            }
+
+            if (_latestReleaseInstallerAsset is null)
+            {
+                _updateStatusText = L("settings.update.status_asset_missing", "A new release is available, but no compatible installer was found.");
+                return;
+            }
+
+            _updateStatusText = Lf("settings.update.status_available_format", "New version {0} is available. Click Download & Install.", _latestReleaseVersionText);
+        }
+        catch (Exception ex)
+        {
+            _updateStatusText = Lf("settings.update.status_check_failed_format", "Update check failed: {0}", ex.Message);
+        }
+        finally
+        {
+            _isCheckingUpdates = false;
+            UpdateUpdatePanelState();
+        }
+    }
+
+    private async Task DownloadAndInstallUpdateAsync(GitHubReleaseAsset asset)
+    {
+        if (_isCheckingUpdates || _isDownloadingUpdate)
+        {
+            return;
+        }
+
+        _isDownloadingUpdate = true;
+        _updateStatusText = L("settings.update.status_downloading", "Downloading installer...");
+        _updateDownloadProgressPercent = 0;
+        _updateDownloadProgressText = Lf("settings.update.download_progress_format", "Download progress: {0:F0}%", _updateDownloadProgressPercent);
+        UpdateUpdatePanelState();
+
+        try
+        {
+            var destinationPath = BuildUpdateInstallerPath(asset.Name);
+            var progress = new Progress<double>(value =>
+            {
+                _updateDownloadProgressPercent = Math.Clamp(value * 100d, 0d, 100d);
+                _updateDownloadProgressText = Lf("settings.update.download_progress_format", "Download progress: {0:F0}%", _updateDownloadProgressPercent);
+                UpdateUpdatePanelState();
+            });
+
+            var result = await _releaseUpdateService.DownloadAssetAsync(asset, destinationPath, progress);
+            if (!result.Success || string.IsNullOrWhiteSpace(result.FilePath))
+            {
+                _updateStatusText = Lf("settings.update.status_download_failed_format", "Download failed: {0}", result.ErrorMessage ?? L("common.unknown", "Unknown error"));
+                return;
+            }
+
+            _downloadedUpdateInstallerPath = result.FilePath;
+            _updateDownloadProgressPercent = 100;
+            _updateDownloadProgressText = Lf("settings.update.download_progress_format", "Download progress: {0:F0}%", _updateDownloadProgressPercent);
+            _updateStatusText = L("settings.update.status_launching_installer", "Download complete. Launching installer...");
+            UpdateUpdatePanelState();
+            LaunchInstallerAndExit(_downloadedUpdateInstallerPath);
+        }
+        catch (Exception ex)
+        {
+            _updateStatusText = Lf("settings.update.status_download_failed_format", "Download failed: {0}", ex.Message);
+        }
+        finally
+        {
+            _isDownloadingUpdate = false;
+            UpdateUpdatePanelState();
+        }
+    }
+
+    private void LaunchInstallerAndExit(string installerPath)
+    {
+        if (string.IsNullOrWhiteSpace(installerPath) || !File.Exists(installerPath))
+        {
+            _updateStatusText = L("settings.update.status_installer_missing", "Installer file was not found after download.");
+            UpdateUpdatePanelState();
+            return;
+        }
+
+        try
+        {
+            Process.Start(new ProcessStartInfo
+            {
+                FileName = installerPath,
+                WorkingDirectory = Path.GetDirectoryName(installerPath) ?? Environment.CurrentDirectory,
+                UseShellExecute = true
+            });
+
+            _updateStatusText = L("settings.update.status_installer_started", "Installer started. The app will close for update.");
+            UpdateUpdatePanelState();
+
+            Dispatcher.UIThread.Post(() =>
+            {
+                if (Application.Current?.ApplicationLifetime is IClassicDesktopStyleApplicationLifetime desktop)
+                {
+                    desktop.Shutdown();
+                }
+                else
+                {
+                    Close();
+                }
+            }, DispatcherPriority.Background);
+        }
+        catch (Exception ex)
+        {
+            _updateStatusText = Lf("settings.update.status_launch_failed_format", "Failed to start installer: {0}", ex.Message);
+            UpdateUpdatePanelState();
+        }
+    }
+
+    private void UpdateUpdatePanelState()
+    {
+        UpdateCurrentVersionValueTextBlock.Text = GetAppVersionText();
+        UpdateLatestVersionValueTextBlock.Text = string.IsNullOrWhiteSpace(_latestReleaseVersionText) ? "-" : _latestReleaseVersionText;
+        UpdatePublishedAtValueTextBlock.Text = _latestReleasePublishedAt.HasValue && _latestReleasePublishedAt.Value != DateTimeOffset.MinValue
+            ? _latestReleasePublishedAt.Value.LocalDateTime.ToString("yyyy-MM-dd HH:mm")
+            : "-";
+        UpdateStatusTextBlock.Text = string.IsNullOrWhiteSpace(_updateStatusText) ? L("settings.update.status_ready", "Ready to check for updates.") : _updateStatusText;
+        UpdateDownloadProgressTextBlock.Text = string.IsNullOrWhiteSpace(_updateDownloadProgressText) ? L("settings.update.download_progress_idle", "Download progress: -") : _updateDownloadProgressText;
+        UpdateDownloadProgressBar.IsVisible = _isDownloadingUpdate;
+        UpdateDownloadProgressBar.Value = Math.Clamp(_updateDownloadProgressPercent, 0d, 100d);
+        CheckForUpdatesButton.IsEnabled = !_isCheckingUpdates && !_isDownloadingUpdate;
+        DownloadAndInstallUpdateButton.IsEnabled = !_isCheckingUpdates && !_isDownloadingUpdate && _latestReleaseInstallerAsset is not null;
+    }
+
+    private static string NormalizeUpdateChannel(string? channel, bool includePrereleaseFallback)
+    {
+        if (string.Equals(channel, UpdateChannelPreview, StringComparison.OrdinalIgnoreCase))
+        {
+            return UpdateChannelPreview;
+        }
+
+        if (string.Equals(channel, UpdateChannelStable, StringComparison.OrdinalIgnoreCase))
+        {
+            return UpdateChannelStable;
+        }
+
+        return includePrereleaseFallback ? UpdateChannelPreview : UpdateChannelStable;
+    }
+
+    private string GetLocalizedUpdateChannelName(string channel)
+    {
+        return string.Equals(channel, UpdateChannelPreview, StringComparison.OrdinalIgnoreCase)
+            ? L("settings.update.channel_preview", "Preview")
+            : L("settings.update.channel_stable", "Stable");
+    }
+
+    private static string BuildUpdateInstallerPath(string assetName)
+    {
+        var appData = Environment.GetFolderPath(Environment.SpecialFolder.LocalApplicationData);
+        var updatesDirectory = Path.Combine(appData, "LanMountainDesktop", "Updates");
+        Directory.CreateDirectory(updatesDirectory);
+
+        var safeName = SanitizeFileName(assetName);
+        return Path.Combine(updatesDirectory, safeName);
+    }
+
+    private static string SanitizeFileName(string fileName)
+    {
+        if (string.IsNullOrWhiteSpace(fileName))
+        {
+            return $"LanMountainDesktop-Update-{DateTime.Now:yyyyMMddHHmmss}.exe";
+        }
+
+        var sanitized = fileName;
+        foreach (var c in Path.GetInvalidFileNameChars())
+        {
+            sanitized = sanitized.Replace(c, '_');
+        }
+
+        return sanitized;
+    }
+}

LanMountainDesktop/Views/SettingsWindow.WallpaperTheme.cs

@@ -0,0 +1,754 @@
+using System;
+using System.Collections.Generic;
+using System.Globalization;
+using System.IO;
+using System.Runtime.InteropServices;
+using System.Threading.Tasks;
+using Avalonia;
+using Avalonia.Controls;
+using Avalonia.Interactivity;
+using Avalonia.Media;
+using Avalonia.Media.Imaging;
+using Avalonia.Platform;
+using Avalonia.Styling;
+using Avalonia.Platform.Storage;
+using LanMountainDesktop.Services;
+using LanMountainDesktop.Theme;
+using LibVLCSharp.Shared;
+
+namespace LanMountainDesktop.Views;
+
+public partial class SettingsWindow
+{
+    private void OnNightModeChecked(object? sender, RoutedEventArgs e)
+    {
+        if (_suppressThemeToggleEvents)
+        {
+            return;
+        }
+
+        ApplyNightModeState(true, refreshPalettes: true);
+    }
+
+    private void OnNightModeUnchecked(object? sender, RoutedEventArgs e)
+    {
+        if (_suppressThemeToggleEvents)
+        {
+            return;
+        }
+
+        ApplyNightModeState(false, refreshPalettes: true);
+    }
+
+    private async void OnPickWallpaperClick(object? sender, RoutedEventArgs e)
+    {
+        if (StorageProvider is null)
+        {
+            _wallpaperStatus = L("settings.wallpaper.storage_unavailable", "Storage provider is unavailable.");
+            UpdateWallpaperDisplay();
+            return;
+        }
+
+        var options = new FilePickerOpenOptions
+        {
+            Title = L("filepicker.title", "Select wallpaper"),
+            AllowMultiple = false,
+            FileTypeFilter =
+            [
+                new FilePickerFileType(L("filepicker.image_files", "Image files")) { Patterns = ["*.png", "*.jpg", "*.jpeg", "*.bmp", "*.gif", "*.webp"] },
+                new FilePickerFileType(L("filepicker.video_files", "Video files")) { Patterns = ["*.mp4", "*.mkv", "*.webm", "*.avi", "*.mov", "*.m4v"] }
+            ]
+        };
+
+        var files = await StorageProvider.OpenFilePickerAsync(options);
+        if (files.Count == 0)
+        {
+            return;
+        }
+
+        try
+        {
+            var importedPath = await ImportWallpaperAssetAsync(files[0]);
+            if (string.IsNullOrWhiteSpace(importedPath))
+            {
+                _wallpaperStatus = L("settings.wallpaper.import_failed", "Failed to import wallpaper file.");
+                UpdateWallpaperDisplay();
+                return;
+            }
+
+            _wallpaperPath = importedPath;
+            var mediaType = DetectWallpaperMediaType(importedPath);
+            switch (mediaType)
+            {
+                case WallpaperMediaType.Image:
+                    _wallpaperBitmap?.Dispose();
+                    _wallpaperBitmap = new Bitmap(importedPath);
+                    _wallpaperVideoPath = null;
+                    _wallpaperMediaType = WallpaperMediaType.Image;
+                    _wallpaperStatus = L("settings.wallpaper.image_applied", "Image wallpaper applied.");
+                    break;
+                case WallpaperMediaType.Video:
+                    _wallpaperBitmap?.Dispose();
+                    _wallpaperBitmap = null;
+                    _wallpaperVideoPath = importedPath;
+                    _wallpaperMediaType = WallpaperMediaType.Video;
+                    _wallpaperStatus = L("settings.wallpaper.video_applied", "Video wallpaper applied.");
+                    break;
+                default:
+                    _wallpaperStatus = L("settings.wallpaper.unsupported_file", "Selected file type is not supported.");
+                    UpdateWallpaperDisplay();
+                    return;
+            }
+
+            ApplyWallpaperBrush();
+            UpdateWallpaperDisplay();
+            RefreshColorPalettes();
+            EnsureSelectedThemeColor();
+            UpdateThemeColorSelectionState();
+            ThemeColorStatusTextBlock.Text = _wallpaperMediaType == WallpaperMediaType.Video
+                ? L("settings.color.theme_updated_video", "Video wallpaper updated. Theme colors refreshed.")
+                : L("settings.color.theme_updated_wallpaper", "Wallpaper updated. Monet colors refreshed.");
+            PersistSettings();
+        }
+        catch (Exception ex)
+        {
+            _wallpaperStatus = Lf("settings.wallpaper.apply_failed_format", "Failed to apply wallpaper: {0}", ex.Message);
+            UpdateWallpaperDisplay();
+        }
+    }
+
+    private void OnClearWallpaperClick(object? sender, RoutedEventArgs e)
+    {
+        StopVideoWallpaper();
+        _wallpaperVideoPath = null;
+        _wallpaperMediaType = WallpaperMediaType.None;
+        _wallpaperBitmap?.Dispose();
+        _wallpaperBitmap = null;
+        _wallpaperPath = null;
+        _wallpaperStatus = L("settings.wallpaper.cleared", "Background reset to solid color.");
+        ApplyWallpaperBrush();
+        UpdateWallpaperDisplay();
+        RefreshColorPalettes();
+        EnsureSelectedThemeColor();
+        UpdateThemeColorSelectionState();
+        ThemeColorStatusTextBlock.Text = L("settings.color.theme_cleared_wallpaper", "Wallpaper cleared. Monet colors refreshed.");
+        PersistSettings();
+    }
+
+    private void OnWallpaperPlacementSelectionChanged(object? sender, SelectionChangedEventArgs e)
+    {
+        ApplyWallpaperBrush();
+        if (_wallpaperMediaType == WallpaperMediaType.Image && _wallpaperBitmap is not null)
+        {
+            _wallpaperStatus = Lf("settings.wallpaper.mode_format", "Wallpaper mode: {0}.", GetLocalizedPlacementDisplayName(GetSelectedWallpaperPlacement()));
+        }
+        else if (_wallpaperMediaType == WallpaperMediaType.Video)
+        {
+            _wallpaperStatus = L("settings.wallpaper.video_mode", "Video wallpaper mode uses automatic fill mode.");
+        }
+
+        UpdateWallpaperDisplay();
+        PersistSettings();
+    }
+
+    private void ApplyWallpaperBrush()
+    {
+        if (_wallpaperMediaType == WallpaperMediaType.Video && !string.IsNullOrWhiteSpace(_wallpaperVideoPath))
+        {
+            DesktopWallpaperLayer.Background = Brushes.Transparent;
+            WallpaperPreviewViewport.Background = GetThemeDefaultDesktopBackground();
+            PlayVideoWallpaper(_wallpaperVideoPath);
+            return;
+        }
+
+        StopVideoWallpaper();
+        if (_wallpaperBitmap is null)
+        {
+            var fallbackBackground = GetThemeDefaultDesktopBackground();
+            DesktopWallpaperLayer.Background = fallbackBackground;
+            WallpaperPreviewViewport.Background = fallbackBackground;
+            return;
+        }
+
+        var placement = GetSelectedWallpaperPlacement();
+        DesktopWallpaperLayer.Background = CreateWallpaperBrush(_wallpaperBitmap, placement, false);
+        WallpaperPreviewViewport.Background = CreateWallpaperBrush(_wallpaperBitmap, placement, true);
+    }
+
+    private void UpdateWallpaperDisplay()
+    {
+        WallpaperPathTextBlock.Text = string.IsNullOrWhiteSpace(_wallpaperPath)
+            ? L("settings.wallpaper.no_selection", "No wallpaper selected.")
+            : Path.GetFileName(_wallpaperPath);
+        WallpaperStatusTextBlock.Text = _wallpaperStatus;
+        WallpaperPlacementComboBox.IsEnabled = _wallpaperMediaType != WallpaperMediaType.Video;
+
+        if (_wallpaperMediaType == WallpaperMediaType.Video)
+        {
+            WallpaperPreviewViewport.Background = GetThemeDefaultDesktopBackground();
+            return;
+        }
+
+        if (_wallpaperBitmap is null)
+        {
+            WallpaperPreviewViewport.Background = GetThemeDefaultDesktopBackground();
+            return;
+        }
+
+        WallpaperPreviewViewport.Background = CreateWallpaperBrush(_wallpaperBitmap, GetSelectedWallpaperPlacement(), true);
+    }
+
+    private ImageBrush CreateWallpaperBrush(Bitmap bitmap, WallpaperPlacement placement, bool forPreview)
+    {
+        var brush = new ImageBrush
+        {
+            Source = bitmap,
+            Stretch = Stretch.UniformToFill,
+            AlignmentX = AlignmentX.Center,
+            AlignmentY = AlignmentY.Center,
+            TileMode = TileMode.None
+        };
+
+        if (forPreview && placement == WallpaperPlacement.Center)
+        {
+            const double nominalScreenWidth = 1920.0;
+            const double previewWidth = 480.0;
+            brush.Transform = new ScaleTransform(previewWidth / nominalScreenWidth, previewWidth / nominalScreenWidth);
+        }
+
+        switch (placement)
+        {
+            case WallpaperPlacement.Fit:
+                brush.Stretch = Stretch.Uniform;
+                break;
+            case WallpaperPlacement.Stretch:
+                brush.Stretch = Stretch.Fill;
+                break;
+            case WallpaperPlacement.Center:
+                brush.Stretch = Stretch.None;
+                break;
+            case WallpaperPlacement.Tile:
+                brush.Stretch = Stretch.None;
+                brush.TileMode = TileMode.Tile;
+                var tileSize = forPreview ? 96d : 220d;
+                brush.DestinationRect = new RelativeRect(0, 0, tileSize, tileSize, RelativeUnit.Absolute);
+                break;
+        }
+
+        return brush;
+    }
+
+    private WallpaperPlacement GetSelectedWallpaperPlacement()
+    {
+        return WallpaperPlacementComboBox.SelectedIndex switch
+        {
+            1 => WallpaperPlacement.Fit,
+            2 => WallpaperPlacement.Stretch,
+            3 => WallpaperPlacement.Center,
+            4 => WallpaperPlacement.Tile,
+            _ => WallpaperPlacement.Fill
+        };
+    }
+
+    private static string GetPlacementDisplayName(WallpaperPlacement placement)
+    {
+        return placement switch
+        {
+            WallpaperPlacement.Fill => "Fill",
+            WallpaperPlacement.Fit => "Fit",
+            WallpaperPlacement.Stretch => "Stretch",
+            WallpaperPlacement.Center => "Center",
+            WallpaperPlacement.Tile => "Tile",
+            _ => "Fill"
+        };
+    }
+
+    private IBrush GetThemeDefaultDesktopBackground()
+    {
+        if (Resources.TryGetResource("AdaptiveSurfaceBaseBrush", ActualThemeVariant, out var resource) &&
+            resource is IBrush themedBrush)
+        {
+            return themedBrush;
+        }
+
+        return _defaultDesktopBackground ??
+               (_isNightMode
+                   ? new SolidColorBrush(Color.Parse("#FF0B1220"))
+                   : new SolidColorBrush(Color.Parse("#FFF3F7FB")));
+    }
+
+    private static int GetPlacementIndexFromSetting(string? placement)
+    {
+        if (string.IsNullOrWhiteSpace(placement))
+        {
+            return 0;
+        }
+
+        return placement.Trim().ToLowerInvariant() switch
+        {
+            "fit" => 1,
+            "stretch" => 2,
+            "center" => 3,
+            "tile" => 4,
+            _ => 0
+        };
+    }
+
+    private void TryRestoreWallpaper(string? savedWallpaperPath)
+    {
+        StopVideoWallpaper();
+        _wallpaperMediaType = WallpaperMediaType.None;
+        _wallpaperVideoPath = null;
+        _wallpaperBitmap?.Dispose();
+        _wallpaperBitmap = null;
+        _wallpaperPath = null;
+
+        if (string.IsNullOrWhiteSpace(savedWallpaperPath))
+        {
+            _wallpaperStatus = L("settings.wallpaper.default_status", "Current background uses solid color.");
+            return;
+        }
+
+        if (!Path.IsPathRooted(savedWallpaperPath) || !File.Exists(savedWallpaperPath))
+        {
+            _wallpaperStatus = L("settings.wallpaper.saved_not_found", "Saved wallpaper file was not found. Using solid color background.");
+            return;
+        }
+
+        try
+        {
+            var mediaType = DetectWallpaperMediaType(savedWallpaperPath);
+            switch (mediaType)
+            {
+                case WallpaperMediaType.Image:
+                    _wallpaperBitmap = new Bitmap(savedWallpaperPath);
+                    _wallpaperPath = savedWallpaperPath;
+                    _wallpaperMediaType = WallpaperMediaType.Image;
+                    _wallpaperStatus = L("settings.wallpaper.restored", "Wallpaper restored from saved settings.");
+                    break;
+                case WallpaperMediaType.Video:
+                    _wallpaperVideoPath = savedWallpaperPath;
+                    _wallpaperPath = savedWallpaperPath;
+                    _wallpaperMediaType = WallpaperMediaType.Video;
+                    _wallpaperStatus = L("settings.wallpaper.video_restored", "Video wallpaper restored from saved settings.");
+                    break;
+                default:
+                    _wallpaperStatus = L("settings.wallpaper.unsupported_file", "Saved wallpaper type is not supported. Using solid color background.");
+                    break;
+            }
+        }
+        catch
+        {
+            _wallpaperStatus = L("settings.wallpaper.restore_failed", "Failed to restore saved wallpaper. Using solid color background.");
+            _wallpaperBitmap?.Dispose();
+            _wallpaperBitmap = null;
+            _wallpaperMediaType = WallpaperMediaType.None;
+            _wallpaperVideoPath = null;
+            _wallpaperPath = null;
+        }
+    }
+
+    private static bool TryParseColor(string? colorText, out Color color)
+    {
+        color = default;
+        if (string.IsNullOrWhiteSpace(colorText))
+        {
+            return false;
+        }
+
+        try
+        {
+            color = Color.Parse(colorText);
+            return true;
+        }
+        catch
+        {
+            return false;
+        }
+    }
+
+    private static WallpaperMediaType DetectWallpaperMediaType(string path)
+    {
+        var extension = Path.GetExtension(path);
+        if (string.IsNullOrWhiteSpace(extension))
+        {
+            return WallpaperMediaType.None;
+        }
+
+        if (SupportedImageExtensions.Contains(extension))
+        {
+            return WallpaperMediaType.Image;
+        }
+
+        if (SupportedVideoExtensions.Contains(extension))
+        {
+            return WallpaperMediaType.Video;
+        }
+
+        return WallpaperMediaType.None;
+    }
+
+    private static async Task<string?> ImportWallpaperAssetAsync(IStorageFile file)
+    {
+        try
+        {
+            var extension = Path.GetExtension(file.Name);
+            if (string.IsNullOrWhiteSpace(extension))
+            {
+                extension = ".bin";
+            }
+
+            var appData = Environment.GetFolderPath(Environment.SpecialFolder.LocalApplicationData);
+            var wallpaperDirectory = Path.Combine(appData, "LanMountainDesktop", "Wallpapers");
+            Directory.CreateDirectory(wallpaperDirectory);
+
+            var destinationPath = Path.Combine(wallpaperDirectory, $"{DateTime.Now:yyyyMMdd_HHmmss}_{Guid.NewGuid():N}{extension}");
+            await using var sourceStream = await file.OpenReadAsync();
+            await using var destinationStream = File.Create(destinationPath);
+            await sourceStream.CopyToAsync(destinationStream);
+            return destinationPath;
+        }
+        catch
+        {
+            return null;
+        }
+    }
+
+    private void EnsureVideoWallpaperPlayers()
+    {
+        Core.Initialize();
+        _libVlc ??= new LibVLC();
+        _previewVideoWallpaperPlayer ??= new MediaPlayer(_libVlc);
+        if (WallpaperPreviewVideoView is not null)
+        {
+            WallpaperPreviewVideoView.MediaPlayer = _previewVideoWallpaperPlayer;
+        }
+    }
+
+    private void PlayVideoWallpaper(string videoPath)
+    {
+        if (!File.Exists(videoPath))
+        {
+            _wallpaperStatus = L("settings.wallpaper.video_not_found", "Video wallpaper file not found.");
+            StopVideoWallpaper();
+            return;
+        }
+
+        try
+        {
+            EnsureVideoWallpaperPlayers();
+            if (_previewVideoWallpaperPlayer is null || _libVlc is null || WallpaperPreviewVideoView is null)
+            {
+                _wallpaperStatus = L("settings.wallpaper.video_player_unavailable", "Video player is unavailable.");
+                StopVideoWallpaper();
+                return;
+            }
+
+            _previewVideoWallpaperMedia?.Dispose();
+            _previewVideoWallpaperMedia = new Media(_libVlc, new Uri(videoPath));
+            _previewVideoWallpaperMedia.AddOption(":input-repeat=65535");
+            _previewVideoWallpaperPlayer.Play(_previewVideoWallpaperMedia);
+            WallpaperPreviewVideoView.IsVisible = true;
+        }
+        catch (Exception ex)
+        {
+            _wallpaperStatus = Lf("settings.wallpaper.video_play_failed_format", "Failed to play video wallpaper: {0}", ex.Message);
+            StopVideoWallpaper();
+        }
+    }
+
+    private void StopVideoWallpaper()
+    {
+        if (WallpaperPreviewVideoView is not null)
+        {
+            WallpaperPreviewVideoView.IsVisible = false;
+        }
+
+        _previewVideoWallpaperPlayer?.Stop();
+        _previewVideoWallpaperMedia?.Dispose();
+        _previewVideoWallpaperMedia = null;
+    }
+
+    private void OnRecommendedColorClick(object? sender, RoutedEventArgs e)
+    {
+        ApplyThemeColorFromButton(sender as Button, L("common.recommended", "Recommended"));
+    }
+
+    private void OnMonetColorClick(object? sender, RoutedEventArgs e)
+    {
+        ApplyThemeColorFromButton(sender as Button, L("common.monet", "Monet"));
+    }
+
+    private void OnRefreshMonetColorsClick(object? sender, RoutedEventArgs e)
+    {
+        RefreshColorPalettes();
+        EnsureSelectedThemeColor();
+        UpdateThemeColorSelectionState();
+        ThemeColorStatusTextBlock.Text = L("settings.color.monet_refreshed", "Monet colors refreshed.");
+        UpdateAdaptiveTextSystem();
+        PersistSettings();
+    }
+
+    private void ApplyNightModeState(bool enabled, bool refreshPalettes)
+    {
+        _isNightMode = enabled;
+        RequestedThemeVariant = enabled ? ThemeVariant.Dark : ThemeVariant.Light;
+        UpdateThemeModeIcon();
+
+        _suppressThemeToggleEvents = true;
+        NightModeToggleSwitch.IsChecked = enabled;
+        _suppressThemeToggleEvents = false;
+
+        if (refreshPalettes)
+        {
+            RefreshColorPalettes();
+            EnsureSelectedThemeColor();
+        }
+
+        UpdateThemeColorSelectionState();
+        ThemeColorStatusTextBlock.Text = Lf("settings.color.mode_status_format", "Theme mode: {0}.", enabled ? L("common.night", "Night") : L("common.day", "Day"));
+        UpdateAdaptiveTextSystem();
+        ApplyWallpaperBrush();
+        PersistSettings();
+    }
+
+    private void RefreshColorPalettes()
+    {
+        var palette = _monetColorService.BuildPalette(_wallpaperBitmap, _isNightMode);
+        _recommendedColors = palette.RecommendedColors;
+        _monetColors = palette.MonetColors;
+        ApplyColorPaletteToButtons(_recommendedColors, GetRecommendedColorTargets());
+        ApplyColorPaletteToButtons(_monetColors, GetMonetColorTargets());
+    }
+
+    private void ApplyColorPaletteToButtons(IReadOnlyList<Color> colors, IReadOnlyList<(Button Button, Border Swatch)> targets)
+    {
+        for (var i = 0; i < targets.Count; i++)
+        {
+            var color = i < colors.Count ? colors[i] : Color.Parse("#00000000");
+            var (button, swatch) = targets[i];
+            button.Tag = color.ToString();
+            button.IsEnabled = i < colors.Count;
+            swatch.Background = i < colors.Count ? new SolidColorBrush(color) : new SolidColorBrush(Color.Parse("#00000000"));
+        }
+    }
+
+    private IReadOnlyList<(Button Button, Border Swatch)> GetRecommendedColorTargets()
+    {
+        return
+        [
+            (RecommendedColorButton1, RecommendedColorSwatch1),
+            (RecommendedColorButton2, RecommendedColorSwatch2),
+            (RecommendedColorButton3, RecommendedColorSwatch3),
+            (RecommendedColorButton4, RecommendedColorSwatch4),
+            (RecommendedColorButton5, RecommendedColorSwatch5),
+            (RecommendedColorButton6, RecommendedColorSwatch6)
+        ];
+    }
+
+    private IReadOnlyList<(Button Button, Border Swatch)> GetMonetColorTargets()
+    {
+        return
+        [
+            (MonetColorButton1, MonetColorSwatch1),
+            (MonetColorButton2, MonetColorSwatch2),
+            (MonetColorButton3, MonetColorSwatch3),
+            (MonetColorButton4, MonetColorSwatch4),
+            (MonetColorButton5, MonetColorSwatch5),
+            (MonetColorButton6, MonetColorSwatch6)
+        ];
+    }
+
+    private void EnsureSelectedThemeColor()
+    {
+        if (ContainsColor(_recommendedColors, _selectedThemeColor) || ContainsColor(_monetColors, _selectedThemeColor))
+        {
+            return;
+        }
+
+        if (_recommendedColors.Count > 0)
+        {
+            _selectedThemeColor = _recommendedColors[0];
+            return;
+        }
+
+        if (_monetColors.Count > 0)
+        {
+            _selectedThemeColor = _monetColors[0];
+        }
+    }
+
+    private void ApplyThemeColorFromButton(Button? button, string sourceLabel)
+    {
+        if (!TryGetButtonColor(button, out var color))
+        {
+            return;
+        }
+
+        _selectedThemeColor = color;
+        UpdateThemeColorSelectionState();
+        ThemeColorStatusTextBlock.Text = Lf("settings.color.theme_applied_format", "{0} color applied: {1}.", sourceLabel, _selectedThemeColor);
+        UpdateAdaptiveTextSystem();
+        PersistSettings();
+    }
+
+    private void UpdateThemeColorSelectionState()
+    {
+        UpdateColorSelectionVisuals(GetRecommendedColorTargets());
+        UpdateColorSelectionVisuals(GetMonetColorTargets());
+    }
+
+    private void UpdateColorSelectionVisuals(IReadOnlyList<(Button Button, Border Swatch)> targets)
+    {
+        foreach (var (button, swatch) in targets)
+        {
+            var isSelected = TryGetButtonColor(button, out var color) && AreSameColor(color, _selectedThemeColor);
+            button.Classes.Set("swatch-button", true);
+            button.Classes.Set("swatch-selected", isSelected);
+            swatch.BorderThickness = new Thickness(0);
+            swatch.Opacity = isSelected ? 1 : 0.9;
+        }
+    }
+
+    private static bool TryGetButtonColor(Button? button, out Color color)
+    {
+        color = default;
+        if (button?.Tag is not string colorText || string.IsNullOrWhiteSpace(colorText))
+        {
+            return false;
+        }
+
+        try
+        {
+            color = Color.Parse(colorText);
+            return true;
+        }
+        catch
+        {
+            return false;
+        }
+    }
+
+    private static bool ContainsColor(IReadOnlyList<Color> colors, Color target)
+    {
+        for (var i = 0; i < colors.Count; i++)
+        {
+            if (AreSameColor(colors[i], target))
+            {
+                return true;
+            }
+        }
+
+        return false;
+    }
+
+    private static bool AreSameColor(Color left, Color right)
+    {
+        return left.R == right.R && left.G == right.G && left.B == right.B;
+    }
+
+    private void UpdateAdaptiveTextSystem()
+    {
+        var context = new ThemeColorContext(_selectedThemeColor, !_isNightMode, !_isNightMode, _isNightMode);
+        ThemeColorSystemService.ApplyThemeResources(Resources, context);
+        GlassEffectService.ApplyGlassResources(Resources, context);
+        if (_fluentAvaloniaTheme is not null)
+        {
+            _fluentAvaloniaTheme.CustomAccentColor = _selectedThemeColor;
+        }
+    }
+
+    private double CalculateCurrentBackgroundLuminance()
+    {
+        if (_wallpaperMediaType == WallpaperMediaType.Video)
+        {
+            return CalculateRelativeLuminance(Color.Parse("#FF0B1220"));
+        }
+
+        if (_wallpaperBitmap is not null)
+        {
+            return CalculateBitmapAverageLuminance(_wallpaperBitmap);
+        }
+
+        return CalculateBrushLuminance(DesktopWallpaperLayer.Background ?? _defaultDesktopBackground);
+    }
+
+    private static double CalculateBrushLuminance(IBrush? brush)
+    {
+        if (brush is ISolidColorBrush solidBrush)
+        {
+            return CalculateRelativeLuminance(solidBrush.Color);
+        }
+
+        return CalculateRelativeLuminance(Color.Parse("#FF020617"));
+    }
+
+    private static double CalculateBitmapAverageLuminance(Bitmap bitmap)
+    {
+        try
+        {
+            var sampleWidth = Math.Clamp(bitmap.PixelSize.Width, 1, 48);
+            var sampleHeight = Math.Clamp(bitmap.PixelSize.Height, 1, 48);
+            using var scaledBitmap = bitmap.CreateScaledBitmap(new PixelSize(sampleWidth, sampleHeight), BitmapInterpolationMode.MediumQuality);
+            using var writeable = new WriteableBitmap(scaledBitmap.PixelSize, new Vector(96, 96), PixelFormat.Bgra8888, AlphaFormat.Premul);
+            using var framebuffer = writeable.Lock();
+            scaledBitmap.CopyPixels(framebuffer, AlphaFormat.Premul);
+
+            var rowBytes = framebuffer.RowBytes;
+            var byteCount = rowBytes * framebuffer.Size.Height;
+            if (byteCount <= 0 || framebuffer.Address == IntPtr.Zero)
+            {
+                return CalculateRelativeLuminance(Color.Parse("#FF020617"));
+            }
+
+            var pixelBuffer = new byte[byteCount];
+            Marshal.Copy(framebuffer.Address, pixelBuffer, 0, byteCount);
+
+            double luminanceSum = 0;
+            var pixelCount = 0;
+            for (var y = 0; y < framebuffer.Size.Height; y++)
+            {
+                var rowOffset = y * rowBytes;
+                for (var x = 0; x < framebuffer.Size.Width; x++)
+                {
+                    var index = rowOffset + (x * 4);
+                    var alpha = pixelBuffer[index + 3] / 255d;
+                    if (alpha <= 0.01)
+                    {
+                        continue;
+                    }
+
+                    var blue = Math.Clamp((pixelBuffer[index] / 255d) / alpha, 0, 1);
+                    var green = Math.Clamp((pixelBuffer[index + 1] / 255d) / alpha, 0, 1);
+                    var red = Math.Clamp((pixelBuffer[index + 2] / 255d) / alpha, 0, 1);
+                    luminanceSum += CalculateRelativeLuminance(red, green, blue);
+                    pixelCount++;
+                }
+            }
+
+            return pixelCount > 0 ? luminanceSum / pixelCount : CalculateRelativeLuminance(Color.Parse("#FF020617"));
+        }
+        catch
+        {
+            return CalculateRelativeLuminance(Color.Parse("#FF020617"));
+        }
+    }
+
+    private static double CalculateRelativeLuminance(Color color)
+    {
+        return CalculateRelativeLuminance(color.R / 255d, color.G / 255d, color.B / 255d);
+    }
+
+    private static double CalculateRelativeLuminance(double red, double green, double blue)
+    {
+        var linearRed = ToLinearRgb(red);
+        var linearGreen = ToLinearRgb(green);
+        var linearBlue = ToLinearRgb(blue);
+        return (0.2126 * linearRed) + (0.7152 * linearGreen) + (0.0722 * linearBlue);
+    }
+
+    private static double ToLinearRgb(double value)
+    {
+        return value <= 0.04045 ? value / 12.92 : Math.Pow((value + 0.055) / 1.055, 2.4);
+    }
+}

LanMountainDesktop/Views/SettingsWindow.WeatherLauncher.cs

@@ -0,0 +1,916 @@
+using System;
+using System.Collections.Generic;
+using System.Globalization;
+using System.IO;
+using System.Linq;
+using System.Threading.Tasks;
+using Avalonia;
+using Avalonia.Controls;
+using Avalonia.Interactivity;
+using Avalonia.Layout;
+using Avalonia.Media;
+using Avalonia.Media.Imaging;
+using Avalonia.Threading;
+using FluentIcons.Common;
+using LanMountainDesktop.Models;
+using LanMountainDesktop.Services;
+
+namespace LanMountainDesktop.Views;
+
+public partial class SettingsWindow
+{
+    private void InitializeWeatherSettings(AppSettingsSnapshot snapshot)
+    {
+        _suppressWeatherLocationEvents = true;
+        try
+        {
+            _weatherLocationMode = ParseWeatherLocationMode(snapshot.WeatherLocationMode);
+            _weatherLocationKey = snapshot.WeatherLocationKey?.Trim() ?? string.Empty;
+            _weatherLocationName = snapshot.WeatherLocationName?.Trim() ?? string.Empty;
+            _weatherLatitude = NormalizeLatitude(snapshot.WeatherLatitude);
+            _weatherLongitude = NormalizeLongitude(snapshot.WeatherLongitude);
+            _weatherAutoRefreshLocation = snapshot.WeatherAutoRefreshLocation;
+            _weatherExcludedAlertsRaw = snapshot.WeatherExcludedAlerts?.Trim() ?? string.Empty;
+            _weatherIconPackId = string.IsNullOrWhiteSpace(snapshot.WeatherIconPackId) ? "FluentRegular" : snapshot.WeatherIconPackId.Trim();
+            _weatherNoTlsRequests = snapshot.WeatherNoTlsRequests;
+            _weatherSearchKeyword = string.Empty;
+
+            var legacyQuery = snapshot.WeatherLocationQuery?.Trim() ?? string.Empty;
+            if (string.IsNullOrWhiteSpace(_weatherLocationKey) && !string.IsNullOrWhiteSpace(legacyQuery))
+            {
+                _weatherLocationKey = legacyQuery;
+            }
+
+            if (string.IsNullOrWhiteSpace(_weatherLocationName) && !string.IsNullOrWhiteSpace(legacyQuery))
+            {
+                _weatherLocationName = legacyQuery;
+            }
+
+            SelectWeatherLocationModeInUi(_weatherLocationMode);
+            WeatherAutoRefreshToggleSwitch.IsChecked = _weatherAutoRefreshLocation;
+            WeatherNoTlsToggleSwitch.IsChecked = _weatherNoTlsRequests;
+            WeatherCitySearchTextBox.Text = string.Empty;
+            WeatherCityResultsComboBox.Items.Clear();
+            WeatherLocationKeyTextBox.Text = _weatherLocationKey;
+            WeatherLocationNameTextBox.Text = _weatherLocationName;
+            WeatherLatitudeNumberBox.Value = _weatherLatitude;
+            WeatherLongitudeNumberBox.Value = _weatherLongitude;
+            WeatherExcludedAlertsTextBox.Text = _weatherExcludedAlertsRaw;
+            SelectWeatherIconPackInUi(_weatherIconPackId);
+            WeatherSearchStatusTextBlock.Text = L("settings.weather.search_hint", "Search by city name and apply one location.");
+            WeatherCoordinateStatusTextBlock.Text = string.Empty;
+            WeatherPreviewResultTextBlock.Text = L("settings.weather.preview_hint", "Use test fetch to verify your weather configuration.");
+            UpdateWeatherPreviewSummary(weatherCode: null, temperatureText: "--", updatedAt: null);
+        }
+        finally
+        {
+            _suppressWeatherLocationEvents = false;
+        }
+
+        UpdateWeatherLocationModePanels();
+        UpdateWeatherLocationStatusText();
+    }
+
+    private void InitializeAutoStartWithWindowsSetting(AppSettingsSnapshot snapshot)
+    {
+        _autoStartWithWindows = OperatingSystem.IsWindows()
+            ? _windowsStartupService.IsEnabled()
+            : snapshot.AutoStartWithWindows;
+
+        _suppressAutoStartToggleEvents = true;
+        try
+        {
+            AutoStartWithWindowsToggleSwitch.IsEnabled = OperatingSystem.IsWindows();
+            AutoStartWithWindowsToggleSwitch.IsChecked = _autoStartWithWindows;
+        }
+        finally
+        {
+            _suppressAutoStartToggleEvents = false;
+        }
+    }
+
+    private static WeatherLocationMode ParseWeatherLocationMode(string? value)
+    {
+        return string.Equals(value, "Coordinates", StringComparison.OrdinalIgnoreCase)
+            ? WeatherLocationMode.Coordinates
+            : WeatherLocationMode.CitySearch;
+    }
+
+    private static string ToWeatherLocationModeTag(WeatherLocationMode mode)
+    {
+        return mode == WeatherLocationMode.Coordinates ? "Coordinates" : "CitySearch";
+    }
+
+    private static double NormalizeLatitude(double value)
+    {
+        if (double.IsNaN(value) || double.IsInfinity(value))
+        {
+            return 39.9042;
+        }
+
+        return Math.Clamp(value, -90, 90);
+    }
+
+    private static double NormalizeLongitude(double value)
+    {
+        if (double.IsNaN(value) || double.IsInfinity(value))
+        {
+            return 116.4074;
+        }
+
+        return Math.Clamp(value, -180, 180);
+    }
+
+    private string BuildLegacyWeatherLocationQuery()
+    {
+        if (!string.IsNullOrWhiteSpace(_weatherLocationName))
+        {
+            return _weatherLocationName;
+        }
+
+        if (!string.IsNullOrWhiteSpace(_weatherLocationKey))
+        {
+            return _weatherLocationKey;
+        }
+
+        return string.Create(CultureInfo.InvariantCulture, $"{_weatherLatitude:F4},{_weatherLongitude:F4}");
+    }
+
+    private void SelectWeatherLocationModeInUi(WeatherLocationMode mode)
+    {
+        var targetTag = ToWeatherLocationModeTag(mode);
+        foreach (var item in WeatherLocationModeComboBox.Items.OfType<ComboBoxItem>())
+        {
+            if (string.Equals(item.Tag?.ToString(), targetTag, StringComparison.OrdinalIgnoreCase))
+            {
+                WeatherLocationModeComboBox.SelectedItem = item;
+                break;
+            }
+        }
+
+        foreach (var item in WeatherLocationModeChipListBox.Items.OfType<ListBoxItem>())
+        {
+            if (string.Equals(item.Tag?.ToString(), targetTag, StringComparison.OrdinalIgnoreCase))
+            {
+                WeatherLocationModeChipListBox.SelectedItem = item;
+                return;
+            }
+        }
+
+        WeatherLocationModeComboBox.SelectedIndex = mode == WeatherLocationMode.Coordinates ? 1 : 0;
+        WeatherLocationModeChipListBox.SelectedIndex = mode == WeatherLocationMode.Coordinates ? 1 : 0;
+    }
+
+    private void SelectWeatherIconPackInUi(string iconPackId)
+    {
+        foreach (var item in WeatherIconPackComboBox.Items.OfType<ComboBoxItem>())
+        {
+            if (string.Equals(item.Tag?.ToString(), iconPackId, StringComparison.OrdinalIgnoreCase))
+            {
+                WeatherIconPackComboBox.SelectedItem = item;
+                return;
+            }
+        }
+
+        WeatherIconPackComboBox.SelectedIndex = 0;
+        _weatherIconPackId = "FluentRegular";
+    }
+
+    private void UpdateWeatherLocationModePanels()
+    {
+        WeatherCitySearchSettingsExpander.IsVisible = _weatherLocationMode == WeatherLocationMode.CitySearch;
+        WeatherCoordinateSettingsExpander.IsVisible = _weatherLocationMode == WeatherLocationMode.Coordinates;
+    }
+
+    private void OnWeatherLocationModeSelectionChanged(object? sender, SelectionChangedEventArgs e)
+    {
+        if (_suppressWeatherLocationEvents || WeatherLocationModeComboBox.SelectedItem is not ComboBoxItem item)
+        {
+            return;
+        }
+
+        _weatherLocationMode = ParseWeatherLocationMode(item.Tag?.ToString());
+        _suppressWeatherLocationEvents = true;
+        try
+        {
+            SelectWeatherLocationModeInUi(_weatherLocationMode);
+        }
+        finally
+        {
+            _suppressWeatherLocationEvents = false;
+        }
+
+        UpdateWeatherLocationModePanels();
+        UpdateWeatherLocationStatusText();
+        PersistSettings();
+    }
+
+    private void OnWeatherLocationModeChipSelectionChanged(object? sender, SelectionChangedEventArgs e)
+    {
+        if (_suppressWeatherLocationEvents || WeatherLocationModeChipListBox.SelectedItem is not ListBoxItem item)
+        {
+            return;
+        }
+
+        _weatherLocationMode = ParseWeatherLocationMode(item.Tag?.ToString());
+        _suppressWeatherLocationEvents = true;
+        try
+        {
+            SelectWeatherLocationModeInUi(_weatherLocationMode);
+        }
+        finally
+        {
+            _suppressWeatherLocationEvents = false;
+        }
+
+        UpdateWeatherLocationModePanels();
+        UpdateWeatherLocationStatusText();
+        PersistSettings();
+    }
+
+    private void OnWeatherAutoRefreshToggled(object? sender, RoutedEventArgs e)
+    {
+        if (_suppressWeatherLocationEvents)
+        {
+            return;
+        }
+
+        _weatherAutoRefreshLocation = WeatherAutoRefreshToggleSwitch.IsChecked == true;
+        PersistSettings();
+    }
+
+    private void OnWeatherExcludedAlertsLostFocus(object? sender, RoutedEventArgs e)
+    {
+        _weatherExcludedAlertsRaw = WeatherExcludedAlertsTextBox.Text?.Trim() ?? string.Empty;
+        PersistSettings();
+    }
+
+    private void OnWeatherIconPackSelectionChanged(object? sender, SelectionChangedEventArgs e)
+    {
+        if (_suppressWeatherLocationEvents || WeatherIconPackComboBox.SelectedItem is not ComboBoxItem item)
+        {
+            return;
+        }
+
+        _weatherIconPackId = item.Tag?.ToString() switch
+        {
+            "FluentFilled" => "FluentFilled",
+            _ => "FluentRegular"
+        };
+
+        WeatherPreviewIconSymbol.IconVariant = string.Equals(_weatherIconPackId, "FluentFilled", StringComparison.OrdinalIgnoreCase)
+            ? IconVariant.Filled
+            : IconVariant.Regular;
+        PersistSettings();
+    }
+
+    private void OnWeatherNoTlsToggled(object? sender, RoutedEventArgs e)
+    {
+        if (_suppressWeatherLocationEvents)
+        {
+            return;
+        }
+
+        _weatherNoTlsRequests = WeatherNoTlsToggleSwitch.IsChecked == true;
+        PersistSettings();
+    }
+
+    private void OnAutoStartWithWindowsToggled(object? sender, RoutedEventArgs e)
+    {
+        if (_suppressAutoStartToggleEvents)
+        {
+            return;
+        }
+
+        var requested = AutoStartWithWindowsToggleSwitch.IsChecked == true;
+        if (!OperatingSystem.IsWindows())
+        {
+            _autoStartWithWindows = false;
+            _suppressAutoStartToggleEvents = true;
+            try
+            {
+                AutoStartWithWindowsToggleSwitch.IsEnabled = false;
+                AutoStartWithWindowsToggleSwitch.IsChecked = false;
+            }
+            finally
+            {
+                _suppressAutoStartToggleEvents = false;
+            }
+
+            PersistSettings();
+            return;
+        }
+
+        var applied = _windowsStartupService.SetEnabled(requested);
+        _autoStartWithWindows = _windowsStartupService.IsEnabled();
+        if (!applied || _autoStartWithWindows != requested)
+        {
+            _suppressAutoStartToggleEvents = true;
+            try
+            {
+                AutoStartWithWindowsToggleSwitch.IsChecked = _autoStartWithWindows;
+            }
+            finally
+            {
+                _suppressAutoStartToggleEvents = false;
+            }
+        }
+
+        PersistSettings();
+    }
+
+    private async void OnSearchWeatherCityClick(object? sender, RoutedEventArgs e)
+    {
+        if (_isWeatherSearchInProgress)
+        {
+            return;
+        }
+
+        var keyword = WeatherCitySearchTextBox.Text?.Trim() ?? string.Empty;
+        if (string.IsNullOrWhiteSpace(keyword))
+        {
+            WeatherSearchStatusTextBlock.Text = L("settings.weather.search_required", "Please enter a city keyword first.");
+            return;
+        }
+
+        _weatherSearchKeyword = keyword;
+        _isWeatherSearchInProgress = true;
+        SetWeatherSearchBusy(true);
+        try
+        {
+            var result = await _weatherDataService.SearchLocationsAsync(keyword, ResolveWeatherApiLocale());
+            if (!result.Success || result.Data is null)
+            {
+                WeatherCityResultsComboBox.Items.Clear();
+                WeatherSearchStatusTextBlock.Text = Lf("settings.weather.search_failed_format", "Search failed: {0}", result.ErrorMessage ?? result.ErrorCode ?? "Unknown error");
+                return;
+            }
+
+            var locations = result.Data.Where(location => !string.IsNullOrWhiteSpace(location.LocationKey)).Take(80).ToList();
+            WeatherCityResultsComboBox.Items.Clear();
+            foreach (var location in locations)
+            {
+                WeatherCityResultsComboBox.Items.Add(new ComboBoxItem
+                {
+                    Content = FormatWeatherLocationDisplayName(location),
+                    Tag = location
+                });
+            }
+
+            WeatherSearchStatusTextBlock.Text = locations.Count == 0
+                ? L("settings.weather.search_no_results", "No locations were found.")
+                : Lf("settings.weather.search_result_count_format", "Found {0} locations.", locations.Count);
+
+            if (locations.Count > 0)
+            {
+                WeatherCityResultsComboBox.SelectedIndex = 0;
+            }
+        }
+        catch (Exception ex)
+        {
+            WeatherSearchStatusTextBlock.Text = Lf("settings.weather.search_failed_format", "Search failed: {0}", ex.Message);
+        }
+        finally
+        {
+            _isWeatherSearchInProgress = false;
+            SetWeatherSearchBusy(false);
+        }
+    }
+
+    private static string FormatWeatherLocationDisplayName(WeatherLocation location)
+    {
+        var affiliation = string.IsNullOrWhiteSpace(location.Affiliation) ? string.Empty : $" ({location.Affiliation})";
+        return string.Create(CultureInfo.InvariantCulture, $"{location.Name}{affiliation} | {location.LocationKey}");
+    }
+
+    private static string BuildWeatherLocationName(WeatherLocation location)
+    {
+        if (string.IsNullOrWhiteSpace(location.Affiliation))
+        {
+            return location.Name;
+        }
+
+        return string.Create(CultureInfo.InvariantCulture, $"{location.Name} ({location.Affiliation})");
+    }
+
+    private void OnApplyWeatherCitySelectionClick(object? sender, RoutedEventArgs e)
+    {
+        if (WeatherCityResultsComboBox.SelectedItem is not ComboBoxItem item || item.Tag is not WeatherLocation location)
+        {
+            WeatherSearchStatusTextBlock.Text = L("settings.weather.search_select_required", "Please select one location from search results.");
+            return;
+        }
+
+        _weatherLocationMode = WeatherLocationMode.CitySearch;
+        _weatherLocationKey = location.LocationKey.Trim();
+        _weatherLocationName = BuildWeatherLocationName(location);
+        _weatherLatitude = NormalizeLatitude(location.Latitude);
+        _weatherLongitude = NormalizeLongitude(location.Longitude);
+
+        _suppressWeatherLocationEvents = true;
+        try
+        {
+            SelectWeatherLocationModeInUi(_weatherLocationMode);
+            WeatherLocationKeyTextBox.Text = _weatherLocationKey;
+            WeatherLocationNameTextBox.Text = _weatherLocationName;
+            WeatherLatitudeNumberBox.Value = _weatherLatitude;
+            WeatherLongitudeNumberBox.Value = _weatherLongitude;
+        }
+        finally
+        {
+            _suppressWeatherLocationEvents = false;
+        }
+
+        WeatherSearchStatusTextBlock.Text = Lf("settings.weather.search_applied_format", "Location applied: {0}", _weatherLocationName);
+        UpdateWeatherLocationModePanels();
+        UpdateWeatherLocationStatusText();
+        PersistSettings();
+    }
+
+    private void OnApplyWeatherCoordinatesClick(object? sender, RoutedEventArgs e)
+    {
+        var latitude = NormalizeLatitude(WeatherLatitudeNumberBox.Value);
+        var longitude = NormalizeLongitude(WeatherLongitudeNumberBox.Value);
+        var keyInput = WeatherLocationKeyTextBox.Text?.Trim() ?? string.Empty;
+        var nameInput = WeatherLocationNameTextBox.Text?.Trim() ?? string.Empty;
+
+        _weatherLocationMode = WeatherLocationMode.Coordinates;
+        _weatherLatitude = latitude;
+        _weatherLongitude = longitude;
+        _weatherLocationKey = string.IsNullOrWhiteSpace(keyInput) ? BuildCoordinateLocationKey(latitude, longitude) : keyInput;
+        _weatherLocationName = string.IsNullOrWhiteSpace(nameInput)
+            ? Lf("settings.weather.coordinates_default_name_format", "Coordinate {0:F4}, {1:F4}", latitude, longitude)
+            : nameInput;
+
+        _suppressWeatherLocationEvents = true;
+        try
+        {
+            SelectWeatherLocationModeInUi(_weatherLocationMode);
+            if (string.IsNullOrWhiteSpace(keyInput))
+            {
+                WeatherLocationKeyTextBox.Text = _weatherLocationKey;
+            }
+
+            if (string.IsNullOrWhiteSpace(nameInput))
+            {
+                WeatherLocationNameTextBox.Text = _weatherLocationName;
+            }
+        }
+        finally
+        {
+            _suppressWeatherLocationEvents = false;
+        }
+
+        WeatherCoordinateStatusTextBlock.Text = Lf("settings.weather.coordinates_saved_format", "Coordinates saved: {0:F4}, {1:F4}", _weatherLatitude, _weatherLongitude);
+        UpdateWeatherLocationModePanels();
+        UpdateWeatherLocationStatusText();
+        PersistSettings();
+    }
+
+    private static string BuildCoordinateLocationKey(double latitude, double longitude)
+    {
+        return string.Create(CultureInfo.InvariantCulture, $"coord:{latitude:F4},{longitude:F4}");
+    }
+
+    private async void OnTestWeatherRequestClick(object? sender, RoutedEventArgs e)
+    {
+        if (_isWeatherPreviewInProgress)
+        {
+            return;
+        }
+
+        if (string.IsNullOrWhiteSpace(_weatherLocationKey))
+        {
+            if (_weatherLocationMode == WeatherLocationMode.Coordinates)
+            {
+                _weatherLocationKey = BuildCoordinateLocationKey(_weatherLatitude, _weatherLongitude);
+            }
+            else
+            {
+                WeatherPreviewResultTextBlock.Text = L("settings.weather.preview_missing_location", "Please apply one weather location before testing.");
+                UpdateWeatherPreviewSummary(null, "--", null);
+                return;
+            }
+        }
+
+        _isWeatherPreviewInProgress = true;
+        SetWeatherPreviewBusy(true);
+        try
+        {
+            var query = new WeatherQuery(_weatherLocationKey, _weatherLatitude, _weatherLongitude, 3, ResolveWeatherApiLocale(), false, true);
+            var result = await _weatherDataService.GetWeatherAsync(query);
+            if (!result.Success || result.Data is null)
+            {
+                WeatherPreviewResultTextBlock.Text = Lf("settings.weather.preview_failed_format", "Test fetch failed: {0}", result.ErrorMessage ?? result.ErrorCode ?? "Unknown error");
+                UpdateWeatherPreviewSummary(null, "--", DateTimeOffset.Now);
+                return;
+            }
+
+            var snapshot = result.Data;
+            var location = string.IsNullOrWhiteSpace(snapshot.LocationName)
+                ? (!string.IsNullOrWhiteSpace(_weatherLocationName) ? _weatherLocationName : _weatherLocationKey)
+                : snapshot.LocationName;
+            var weather = snapshot.Current.WeatherText ?? L("settings.weather.preview_unknown", "Unknown");
+            var temperature = snapshot.Current.TemperatureC.HasValue
+                ? string.Create(CultureInfo.InvariantCulture, $"{snapshot.Current.TemperatureC.Value:F1} C")
+                : "--";
+            var updatedAt = snapshot.ObservationTime ?? snapshot.FetchedAt;
+
+            WeatherPreviewResultTextBlock.Text = Lf("settings.weather.preview_success_format", "Test success: {0} | {1} | {2}", location, weather, temperature);
+            UpdateWeatherPreviewSummary(snapshot.Current.WeatherCode, temperature, updatedAt);
+        }
+        catch (Exception ex)
+        {
+            WeatherPreviewResultTextBlock.Text = Lf("settings.weather.preview_failed_format", "Test fetch failed: {0}", ex.Message);
+            UpdateWeatherPreviewSummary(null, "--", DateTimeOffset.Now);
+        }
+        finally
+        {
+            _isWeatherPreviewInProgress = false;
+            SetWeatherPreviewBusy(false);
+        }
+    }
+
+    private void UpdateWeatherPreviewSummary(int? weatherCode, string temperatureText, DateTimeOffset? updatedAt)
+    {
+        WeatherPreviewIconSymbol.Symbol = ResolveWeatherPreviewSymbol(weatherCode, _isNightMode);
+        WeatherPreviewIconSymbol.IconVariant = string.Equals(_weatherIconPackId, "FluentFilled", StringComparison.OrdinalIgnoreCase)
+            ? IconVariant.Filled
+            : IconVariant.Regular;
+        WeatherPreviewTemperatureTextBlock.Text = string.IsNullOrWhiteSpace(temperatureText) ? "--" : temperatureText;
+        WeatherPreviewUpdatedTextBlock.Text = updatedAt.HasValue
+            ? Lf("weather.widget.updated_format", "Updated {0:HH:mm}", updatedAt.Value.LocalDateTime)
+            : "-";
+    }
+
+    private static Symbol ResolveWeatherPreviewSymbol(int? weatherCode, bool isNight)
+    {
+        return weatherCode switch
+        {
+            0 => isNight ? Symbol.WeatherMoon : Symbol.WeatherSunny,
+            1 or 2 => isNight ? Symbol.WeatherPartlyCloudyNight : Symbol.WeatherPartlyCloudyDay,
+            3 or 7 => Symbol.WeatherRainShowersDay,
+            8 or 9 => Symbol.WeatherRain,
+            4 => Symbol.WeatherThunderstorm,
+            13 or 14 or 15 or 16 => Symbol.WeatherSnow,
+            18 or 32 => Symbol.WeatherFog,
+            _ => isNight ? Symbol.WeatherPartlyCloudyNight : Symbol.WeatherPartlyCloudyDay
+        };
+    }
+
+    private void SetWeatherSearchBusy(bool isBusy)
+    {
+        WeatherSearchButton.IsEnabled = !isBusy;
+        WeatherSearchProgressRing.IsVisible = isBusy;
+    }
+
+    private void SetWeatherPreviewBusy(bool isBusy)
+    {
+        WeatherPreviewButton.IsEnabled = !isBusy;
+        WeatherPreviewProgressRing.IsVisible = isBusy;
+    }
+
+    private string ResolveWeatherApiLocale()
+    {
+        return string.Equals(_languageCode, "zh-CN", StringComparison.OrdinalIgnoreCase) ? "zh_cn" : "en_us";
+    }
+
+    private void UpdateWeatherLocationStatusText()
+    {
+        var modeText = _weatherLocationMode == WeatherLocationMode.Coordinates
+            ? L("settings.weather.mode_coordinates", "Coordinates")
+            : L("settings.weather.mode_city_search", "City Search");
+
+        if (_weatherLocationMode == WeatherLocationMode.CitySearch)
+        {
+            if (string.IsNullOrWhiteSpace(_weatherLocationKey))
+            {
+                WeatherLocationStatusTextBlock.Text = L("settings.weather.status_city_empty", "No city location is configured.");
+                return;
+            }
+
+            var locationName = string.IsNullOrWhiteSpace(_weatherLocationName) ? _weatherLocationKey : _weatherLocationName;
+            WeatherLocationStatusTextBlock.Text = Lf("settings.weather.status_city_format", "Mode: {0} | {1} | Key: {2}", modeText, locationName, _weatherLocationKey);
+            return;
+        }
+
+        WeatherLocationStatusTextBlock.Text = Lf(
+            "settings.weather.status_coordinates_format",
+            "Mode: {0} | Lat {1:F4}, Lon {2:F4} | Key: {3}",
+            modeText,
+            _weatherLatitude,
+            _weatherLongitude,
+            string.IsNullOrWhiteSpace(_weatherLocationKey) ? BuildCoordinateLocationKey(_weatherLatitude, _weatherLongitude) : _weatherLocationKey);
+    }
+
+    private void InitializeLauncherVisibilitySettings(LauncherSettingsSnapshot snapshot)
+    {
+        _hiddenLauncherFolderPaths.Clear();
+        if (snapshot.HiddenLauncherFolderPaths is not null)
+        {
+            foreach (var folderPath in snapshot.HiddenLauncherFolderPaths)
+            {
+                var key = NormalizeLauncherHiddenKey(folderPath);
+                if (!string.IsNullOrWhiteSpace(key))
+                {
+                    _hiddenLauncherFolderPaths.Add(key);
+                }
+            }
+        }
+
+        _hiddenLauncherAppPaths.Clear();
+        if (snapshot.HiddenLauncherAppPaths is not null)
+        {
+            foreach (var appPath in snapshot.HiddenLauncherAppPaths)
+            {
+                var key = NormalizeLauncherHiddenKey(appPath);
+                if (!string.IsNullOrWhiteSpace(key))
+                {
+                    _hiddenLauncherAppPaths.Add(key);
+                }
+            }
+        }
+    }
+
+    private async Task LoadLauncherEntriesAsync()
+    {
+        try
+        {
+            var loadResult = await Task.Run(() =>
+            {
+                var loadedRoot = OperatingSystem.IsLinux() ? _linuxDesktopEntryService.Load() : _windowsStartMenuService.Load();
+                var folderIconBytes = OperatingSystem.IsWindows() ? WindowsIconService.TryGetSystemFolderIconPngBytes() : null;
+                return (Root: loadedRoot, FolderIcon: folderIconBytes);
+            });
+
+            await Dispatcher.UIThread.InvokeAsync(() =>
+            {
+                _startMenuRoot = loadResult.Root;
+                _launcherFolderIconPngBytes = loadResult.FolderIcon;
+                _launcherFolderIconBitmap?.Dispose();
+                _launcherFolderIconBitmap = null;
+                RenderLauncherHiddenItemsList();
+            }, DispatcherPriority.Background);
+        }
+        catch
+        {
+            _startMenuRoot = new StartMenuFolderNode("All Apps", string.Empty);
+            _launcherFolderIconPngBytes = null;
+            _launcherFolderIconBitmap?.Dispose();
+            _launcherFolderIconBitmap = null;
+            RenderLauncherHiddenItemsList();
+        }
+    }
+
+    private static string NormalizeLauncherHiddenKey(string? key)
+    {
+        return string.IsNullOrWhiteSpace(key) ? string.Empty : key.Trim();
+    }
+
+    private void RenderLauncherHiddenItemsList()
+    {
+        LauncherHiddenItemsListPanel.Children.Clear();
+        var hiddenItems = BuildLauncherHiddenItems();
+        LauncherHiddenItemsEmptyTextBlock.IsVisible = hiddenItems.Count == 0;
+        if (hiddenItems.Count == 0)
+        {
+            return;
+        }
+
+        foreach (var hiddenItem in hiddenItems)
+        {
+            LauncherHiddenItemsListPanel.Children.Add(CreateLauncherHiddenItemRow(hiddenItem));
+        }
+    }
+
+    private IReadOnlyList<LauncherHiddenItemView> BuildLauncherHiddenItems()
+    {
+        var items = new List<LauncherHiddenItemView>();
+        var seenFolders = new HashSet<string>(StringComparer.OrdinalIgnoreCase);
+        var seenApps = new HashSet<string>(StringComparer.OrdinalIgnoreCase);
+
+        CollectHiddenLauncherItems(_startMenuRoot, items, seenFolders, seenApps);
+
+        foreach (var key in _hiddenLauncherFolderPaths.OrderBy(path => path, StringComparer.OrdinalIgnoreCase))
+        {
+            if (!seenFolders.Contains(key))
+            {
+                items.Add(new LauncherHiddenItemView(LauncherEntryKind.Folder, key, BuildLauncherHiddenFallbackDisplayName(key), "DIR", GetLauncherFolderIconBitmap()));
+            }
+        }
+
+        foreach (var key in _hiddenLauncherAppPaths.OrderBy(path => path, StringComparer.OrdinalIgnoreCase))
+        {
+            if (!seenApps.Contains(key))
+            {
+                var fallbackName = BuildLauncherHiddenFallbackDisplayName(key);
+                items.Add(new LauncherHiddenItemView(LauncherEntryKind.Shortcut, key, fallbackName, BuildMonogram(fallbackName), null));
+            }
+        }
+
+        return items
+            .OrderBy(item => item.DisplayName, StringComparer.CurrentCultureIgnoreCase)
+            .ThenBy(item => item.Key, StringComparer.OrdinalIgnoreCase)
+            .ToList();
+    }
+
+    private void CollectHiddenLauncherItems(StartMenuFolderNode folder, List<LauncherHiddenItemView> items, HashSet<string> seenFolders, HashSet<string> seenApps)
+    {
+        foreach (var subFolder in folder.Folders)
+        {
+            var folderKey = NormalizeLauncherHiddenKey(subFolder.RelativePath);
+            if (!string.IsNullOrWhiteSpace(folderKey) && _hiddenLauncherFolderPaths.Contains(folderKey) && seenFolders.Add(folderKey))
+            {
+                items.Add(new LauncherHiddenItemView(LauncherEntryKind.Folder, folderKey, subFolder.Name, "DIR", GetLauncherFolderIconBitmap()));
+            }
+
+            CollectHiddenLauncherItems(subFolder, items, seenFolders, seenApps);
+        }
+
+        foreach (var app in folder.Apps)
+        {
+            var appKey = NormalizeLauncherHiddenKey(app.RelativePath);
+            if (string.IsNullOrWhiteSpace(appKey) || !_hiddenLauncherAppPaths.Contains(appKey) || !seenApps.Add(appKey))
+            {
+                continue;
+            }
+
+            items.Add(new LauncherHiddenItemView(LauncherEntryKind.Shortcut, appKey, app.DisplayName, BuildMonogram(app.DisplayName), GetLauncherIconBitmap(app)));
+        }
+    }
+
+    private static string BuildLauncherHiddenFallbackDisplayName(string key)
+    {
+        if (string.IsNullOrWhiteSpace(key))
+        {
+            return "Unknown";
+        }
+
+        var normalized = key.Replace('\\', '/');
+        var fileName = Path.GetFileNameWithoutExtension(normalized);
+        return string.IsNullOrWhiteSpace(fileName) ? key : fileName;
+    }
+
+    private Control CreateLauncherHiddenItemRow(LauncherHiddenItemView hiddenItem)
+    {
+        Control icon = hiddenItem.IconBitmap is not null
+            ? new Image
+            {
+                Source = hiddenItem.IconBitmap,
+                Width = 24,
+                Height = 24,
+                Stretch = Stretch.Uniform
+            }
+            : new Border
+            {
+                Width = 24,
+                Height = 24,
+                CornerRadius = new CornerRadius(999),
+                Background = GetThemeBrush("AdaptiveButtonBackgroundBrush"),
+                Child = new TextBlock
+                {
+                    Text = hiddenItem.Monogram,
+                    FontSize = 10,
+                    FontWeight = FontWeight.Bold,
+                    HorizontalAlignment = HorizontalAlignment.Center,
+                    VerticalAlignment = VerticalAlignment.Center
+                }
+            };
+
+        var typeText = hiddenItem.Kind == LauncherEntryKind.Folder
+            ? L("settings.launcher.hidden_type_folder", "Folder")
+            : L("settings.launcher.hidden_type_shortcut", "Shortcut");
+
+        var infoPanel = new StackPanel
+        {
+            Orientation = Orientation.Horizontal,
+            Spacing = 10,
+            VerticalAlignment = VerticalAlignment.Center,
+            HorizontalAlignment = HorizontalAlignment.Stretch
+        };
+        infoPanel.Children.Add(icon);
+        infoPanel.Children.Add(new StackPanel
+        {
+            Spacing = 2,
+            VerticalAlignment = VerticalAlignment.Center,
+            HorizontalAlignment = HorizontalAlignment.Left,
+            Children =
+            {
+                new TextBlock { Text = hiddenItem.DisplayName, TextTrimming = TextTrimming.CharacterEllipsis, MaxLines = 1 },
+                new TextBlock { Text = typeText, FontSize = 11, Opacity = 0.7 }
+            }
+        });
+
+        var restoreButton = new Button
+        {
+            Content = L("settings.launcher.restore_button", "Show Again"),
+            MinWidth = 110,
+            Padding = new Thickness(12, 6),
+            Tag = new LauncherHiddenItemToken(hiddenItem.Kind, hiddenItem.Key)
+        };
+        restoreButton.Click += OnRestoreLauncherHiddenItemClick;
+
+        var row = new Grid
+        {
+            ColumnDefinitions = new ColumnDefinitions("*,Auto"),
+            ColumnSpacing = 10
+        };
+        row.Children.Add(infoPanel);
+        Grid.SetColumn(infoPanel, 0);
+        row.Children.Add(restoreButton);
+        Grid.SetColumn(restoreButton, 1);
+
+        return new Border
+        {
+            Classes = { "glass-panel" },
+            BorderThickness = new Thickness(0),
+            CornerRadius = new CornerRadius(14),
+            Padding = new Thickness(10, 8),
+            Child = row
+        };
+    }
+
+    private void OnRestoreLauncherHiddenItemClick(object? sender, RoutedEventArgs e)
+    {
+        if (sender is not Button { Tag: LauncherHiddenItemToken token })
+        {
+            return;
+        }
+
+        var removed = token.Kind switch
+        {
+            LauncherEntryKind.Folder => _hiddenLauncherFolderPaths.Remove(token.Key),
+            LauncherEntryKind.Shortcut => _hiddenLauncherAppPaths.Remove(token.Key),
+            _ => false
+        };
+
+        if (!removed)
+        {
+            return;
+        }
+
+        RenderLauncherHiddenItemsList();
+        PersistSettings();
+    }
+
+    private Bitmap? GetLauncherIconBitmap(StartMenuAppEntry app)
+    {
+        if (app.IconPngBytes is null || app.IconPngBytes.Length == 0)
+        {
+            return null;
+        }
+
+        if (_launcherIconCache.TryGetValue(app.RelativePath, out var cached))
+        {
+            return cached;
+        }
+
+        try
+        {
+            using var stream = new MemoryStream(app.IconPngBytes, writable: false);
+            var bitmap = new Bitmap(stream);
+            _launcherIconCache[app.RelativePath] = bitmap;
+            return bitmap;
+        }
+        catch
+        {
+            return null;
+        }
+    }
+
+    private Bitmap? GetLauncherFolderIconBitmap()
+    {
+        if (_launcherFolderIconBitmap is not null)
+        {
+            return _launcherFolderIconBitmap;
+        }
+
+        if (_launcherFolderIconPngBytes is null || _launcherFolderIconPngBytes.Length == 0)
+        {
+            return null;
+        }
+
+        try
+        {
+            using var stream = new MemoryStream(_launcherFolderIconPngBytes, writable: false);
+            _launcherFolderIconBitmap = new Bitmap(stream);
+            return _launcherFolderIconBitmap;
+        }
+        catch
+        {
+            _launcherFolderIconBitmap = null;
+            return null;
+        }
+    }
+
+    private static string BuildMonogram(string text)
+    {
+        if (string.IsNullOrWhiteSpace(text))
+        {
+            return "?";
+        }
+
+        var letters = text.Trim().Split(' ', StringSplitOptions.RemoveEmptyEntries).Select(part => part[0]).Take(2).ToArray();
+        return letters.Length == 0 ? "?" : new string(letters).ToUpperInvariant();
+    }
+}

LanMountainDesktop/Views/SettingsWindow.axaml

@@ -0,0 +1,179 @@
+<Window xmlns="https://github.com/avaloniaui"
+        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
+        xmlns:ui="using:FluentAvalonia.UI.Controls"
+        xmlns:fi="using:FluentIcons.Avalonia"
+        xmlns:ic="using:FluentIcons.Avalonia.Fluent"
+        xmlns:pages="using:LanMountainDesktop.Views.SettingsPages"
+        xmlns:comp="using:LanMountainDesktop.Views.Components"
+        x:Class="LanMountainDesktop.Views.SettingsWindow"
+        Title="Settings"
+        Icon="/Assets/avalonia-logo.ico"
+        Width="1360"
+        Height="900"
+        MinWidth="1120"
+        MinHeight="760"
+        ShowInTaskbar="True"
+        WindowStartupLocation="CenterScreen"
+        ExtendClientAreaToDecorationsHint="True"
+        ExtendClientAreaChromeHints="SystemChrome"
+        Background="{DynamicResource AdaptiveSurfaceBaseBrush}">
+
+    <Grid x:Name="DesktopHost">
+        <Border x:Name="DesktopWallpaperLayer"
+                Background="{DynamicResource AdaptiveSurfaceBaseBrush}" />
+
+        <Grid x:Name="SettingsPage"
+              Classes="settings-scope"
+              IsVisible="True"
+              Opacity="1"
+              Margin="20">
+            <Border x:Name="SettingsContentPanel"
+                    Background="Transparent"
+                    BorderThickness="0"
+                    Margin="0"
+                    Padding="0"
+                    HorizontalAlignment="Stretch"
+                    VerticalAlignment="Stretch">
+                <Grid RowDefinitions="Auto,*">
+                    <Border Grid.Row="0"
+                            Classes="mica-strong"
+                            CornerRadius="24,24,0,0"
+                            Padding="20,16">
+                        <Grid ColumnDefinitions="Auto,*,Auto">
+                            <Border Width="40"
+                                    Height="40"
+                                    CornerRadius="20"
+                                    Background="{DynamicResource AdaptiveAccentBrush}">
+                                <fi:FluentIcon Icon="Settings"
+                                               IconVariant="Regular"
+                                               Foreground="White"
+                                               FontSize="18"
+                                               HorizontalAlignment="Center"
+                                               VerticalAlignment="Center" />
+                            </Border>
+                            <StackPanel Grid.Column="1"
+                                        Margin="14,0,0,0"
+                                        Spacing="2"
+                                        VerticalAlignment="Center">
+                                <TextBlock x:Name="WindowTitleTextBlock"
+                                           FontSize="24"
+                                           FontWeight="SemiBold"
+                                           Text="Settings" />
+                                <TextBlock x:Name="WindowSubtitleTextBlock"
+                                           Foreground="{DynamicResource AdaptiveTextSecondaryBrush}"
+                                           Text="LanMountainDesktop preferences" />
+                            </StackPanel>
+                            <Button Grid.Column="2"
+                                    Padding="10,8"
+                                    HorizontalAlignment="Right"
+                                    Click="OnCloseWindowClick">
+                                <StackPanel Orientation="Horizontal" Spacing="8">
+                                    <fi:FluentIcon Icon="Dismiss" IconVariant="Regular" />
+                                    <TextBlock Text="Close" VerticalAlignment="Center" />
+                                </StackPanel>
+                            </Button>
+                        </Grid>
+                    </Border>
+
+                    <Border Grid.Row="1"
+                            Classes="mica-strong"
+                            CornerRadius="0,0,24,24"
+                            Padding="18">
+                        <ui:NavigationView x:Name="SettingsNavView"
+                                           PaneDisplayMode="Left"
+                                           IsSettingsVisible="False"
+                                           OpenPaneLength="240"
+                                           SelectionChanged="OnSettingsNavSelectionChanged">
+                            <ui:NavigationView.MenuItems>
+                                <ui:NavigationViewItem x:Name="SettingsNavWallpaperItem" Content="壁纸" Tag="Wallpaper">
+                                    <ui:NavigationViewItem.IconSource>
+                                        <ic:SymbolIconSource Symbol="Wallpaper" IconVariant="Regular" />
+                                    </ui:NavigationViewItem.IconSource>
+                                </ui:NavigationViewItem>
+                                <ui:NavigationViewItem x:Name="SettingsNavGridItem" Content="网格" Tag="Grid">
+                                    <ui:NavigationViewItem.IconSource>
+                                        <ic:SymbolIconSource Symbol="Grid" IconVariant="Regular" />
+                                    </ui:NavigationViewItem.IconSource>
+                                </ui:NavigationViewItem>
+                                <ui:NavigationViewItem x:Name="SettingsNavColorItem" Content="颜色" Tag="Color">
+                                    <ui:NavigationViewItem.IconSource>
+                                        <ic:SymbolIconSource Symbol="Color" IconVariant="Regular" />
+                                    </ui:NavigationViewItem.IconSource>
+                                </ui:NavigationViewItem>
+                                <ui:NavigationViewItem x:Name="SettingsNavStatusBarItem" Content="状态栏" Tag="StatusBar">
+                                    <ui:NavigationViewItem.IconSource>
+                                        <ic:SymbolIconSource Symbol="Status" IconVariant="Regular" />
+                                    </ui:NavigationViewItem.IconSource>
+                                </ui:NavigationViewItem>
+                                <ui:NavigationViewItem x:Name="SettingsNavWeatherItem" Content="天气" Tag="Weather">
+                                    <ui:NavigationViewItem.IconSource>
+                                        <ic:SymbolIconSource Symbol="WeatherSunny" IconVariant="Regular" />
+                                    </ui:NavigationViewItem.IconSource>
+                                </ui:NavigationViewItem>
+                                <ui:NavigationViewItem x:Name="SettingsNavRegionItem" Content="地区" Tag="Region">
+                                    <ui:NavigationViewItem.IconSource>
+                                        <ic:SymbolIconSource Symbol="Globe" IconVariant="Regular" />
+                                    </ui:NavigationViewItem.IconSource>
+                                </ui:NavigationViewItem>
+                                <ui:NavigationViewItem x:Name="SettingsNavUpdateItem" Content="更新" Tag="Update">
+                                    <ui:NavigationViewItem.IconSource>
+                                        <ic:SymbolIconSource Symbol="ArrowSync" IconVariant="Regular" />
+                                    </ui:NavigationViewItem.IconSource>
+                                </ui:NavigationViewItem>
+                                <ui:NavigationViewItem x:Name="SettingsNavAboutItem" Content="关于" Tag="About">
+                                    <ui:NavigationViewItem.IconSource>
+                                        <ic:SymbolIconSource Symbol="Info" IconVariant="Regular" />
+                                    </ui:NavigationViewItem.IconSource>
+                                </ui:NavigationViewItem>
+                                <ui:NavigationViewItem x:Name="SettingsNavLauncherItem" Content="应用启动台" Tag="Launcher">
+                                    <ui:NavigationViewItem.IconSource>
+                                        <ic:SymbolIconSource Symbol="Apps" IconVariant="Regular" />
+                                    </ui:NavigationViewItem.IconSource>
+                                </ui:NavigationViewItem>
+                                <ui:NavigationViewItem x:Name="SettingsNavPluginsItem" Content="插件" Tag="Plugins">
+                                    <ui:NavigationViewItem.IconSource>
+                                        <ic:SymbolIconSource Symbol="PuzzlePiece" IconVariant="Regular" />
+                                    </ui:NavigationViewItem.IconSource>
+                                </ui:NavigationViewItem>
+                            </ui:NavigationView.MenuItems>
+
+                            <ScrollViewer x:Name="SettingsContentScrollViewer"
+                                          Padding="0,0,16,0"
+                                          HorizontalScrollBarVisibility="Disabled"
+                                          VerticalScrollBarVisibility="Auto">
+                                <Grid>
+                                    <pages:WallpaperSettingsPage x:Name="WallpaperSettingsPanel" IsVisible="True" />
+                                    <pages:GridSettingsPage x:Name="GridSettingsPanel" IsVisible="False" />
+                                    <pages:ColorSettingsPage x:Name="ColorSettingsPanel" IsVisible="False" />
+                                    <pages:StatusBarSettingsPage x:Name="StatusBarSettingsPanel" IsVisible="False" />
+                                    <pages:WeatherSettingsPage x:Name="WeatherSettingsPanel" IsVisible="False" />
+                                    <pages:RegionSettingsPage x:Name="RegionSettingsPanel" IsVisible="False" />
+                                    <pages:UpdateSettingsPage x:Name="UpdateSettingsPanel" IsVisible="False" />
+                                    <pages:LauncherSettingsPage x:Name="LauncherSettingsPanel" IsVisible="False" />
+                                    <pages:AboutSettingsPage x:Name="AboutSettingsPanel" IsVisible="False" />
+                                    <pages:PluginSettingsPage x:Name="PluginSettingsPanel" IsVisible="False" />
+                                </Grid>
+                            </ScrollViewer>
+                        </ui:NavigationView>
+                    </Border>
+                </Grid>
+            </Border>
+        </Grid>
+
+        <Grid IsVisible="False">
+            <Button x:Name="BackToWindowsButton" />
+            <Button x:Name="OpenComponentLibraryButton" />
+            <Button x:Name="OpenSettingsButton" />
+            <TextBlock x:Name="OpenSettingsButtonTextBlock" />
+            <Border x:Name="TaskbarFixedActionsHost" />
+            <Border x:Name="TaskbarSettingsActionHost" />
+            <StackPanel x:Name="TaskbarDynamicActionsHost" />
+            <Border x:Name="TopStatusBarHost">
+                <StackPanel x:Name="TopStatusComponentsPanel">
+                    <comp:ClockWidget x:Name="ClockWidget" />
+                </StackPanel>
+            </Border>
+            <Border x:Name="BottomTaskbarContainer" />
+        </Grid>
+    </Grid>
+</Window>

LanMountainDesktop/Views/SettingsWindow.axaml.cs

@@ -0,0 +1,294 @@
+using System;
+using System.Collections.Generic;
+using System.IO;
+using System.Linq;
+using System.Runtime.InteropServices;
+using Avalonia;
+using Avalonia.Controls;
+using Avalonia.Controls.Primitives;
+using Avalonia.Interactivity;
+using Avalonia.Layout;
+using Avalonia.Markup.Xaml;
+using Avalonia.Media;
+using Avalonia.Media.Imaging;
+using Avalonia.Platform;
+using Avalonia.Platform.Storage;
+using Avalonia.Styling;
+using Avalonia.Threading;
+using FluentAvalonia.Styling;
+using FluentAvalonia.UI.Controls;
+using LanMountainDesktop.ComponentSystem;
+using LanMountainDesktop.Models;
+using LanMountainDesktop.Services;
+using LanMountainDesktop.Theme;
+using LanMountainDesktop.Views.Components;
+using LibVLCSharp.Shared;
+using Line = Avalonia.Controls.Shapes.Line;
+
+namespace LanMountainDesktop.Views;
+
+public partial class SettingsWindow : Window
+{
+    private enum WallpaperPlacement
+    {
+        Fill,
+        Fit,
+        Stretch,
+        Center,
+        Tile
+    }
+
+    private enum WallpaperMediaType
+    {
+        None,
+        Image,
+        Video
+    }
+
+    private enum WeatherLocationMode
+    {
+        CitySearch,
+        Coordinates
+    }
+
+    private const int MinShortSideCells = 6;
+    private const int MaxShortSideCells = 96;
+    private const int MinEdgeInsetPercent = 0;
+    private const int MaxEdgeInsetPercent = 30;
+    private const int DefaultEdgeInsetPercent = 18;
+    private const double WallpaperPreviewMaxWidth = 520;
+    private const double LightBackgroundLuminanceThreshold = 0.57;
+    private const string TaskbarLayoutBottomFullRowMacStyle = "BottomFullRowMacStyle";
+    private static readonly HashSet<string> SupportedImageExtensions = new(StringComparer.OrdinalIgnoreCase)
+    {
+        ".png", ".jpg", ".jpeg", ".bmp", ".gif", ".webp"
+    };
+    private static readonly HashSet<string> SupportedVideoExtensions = new(StringComparer.OrdinalIgnoreCase)
+    {
+        ".mp4", ".mkv", ".webm", ".avi", ".mov", ".m4v"
+    };
+    private static readonly TaskbarActionId[] DefaultPinnedTaskbarActions =
+    [
+        TaskbarActionId.MinimizeToWindows,
+        TaskbarActionId.OpenSettings
+    ];
+
+    private readonly record struct GridMetrics(
+        int ColumnCount,
+        int RowCount,
+        double CellSize,
+        double GapPx,
+        double EdgeInsetPx,
+        double GridWidthPx,
+        double GridHeightPx)
+    {
+        public double Pitch => CellSize + GapPx;
+    }
+
+    private readonly MonetColorService _monetColorService = new();
+    private readonly AppSettingsService _appSettingsService = new();
+    private readonly LauncherSettingsService _launcherSettingsService = new();
+    private readonly LocalizationService _localizationService = new();
+    private readonly TimeZoneService _timeZoneService = new();
+    private readonly WindowsStartupService _windowsStartupService = new();
+    private readonly GitHubReleaseUpdateService _releaseUpdateService = new("wwiinnddyy", "LanMountainDesktop");
+    private readonly IWeatherDataService _weatherDataService = new XiaomiWeatherService();
+    private readonly ComponentRegistry _componentRegistry = ComponentRegistry.CreateDefault();
+    private readonly WindowsStartMenuService _windowsStartMenuService = new();
+    private readonly LinuxDesktopEntryService _linuxDesktopEntryService = new();
+    private readonly FluentAvaloniaTheme? _fluentAvaloniaTheme;
+    private readonly HashSet<string> _topStatusComponentIds = new(StringComparer.OrdinalIgnoreCase);
+    private readonly HashSet<TaskbarActionId> _pinnedTaskbarActions = [];
+    private readonly HashSet<string> _hiddenLauncherFolderPaths = new(StringComparer.OrdinalIgnoreCase);
+    private readonly HashSet<string> _hiddenLauncherAppPaths = new(StringComparer.OrdinalIgnoreCase);
+    private readonly Stack<StartMenuFolderNode> _launcherFolderStack = [];
+
+    private StartMenuFolderNode _startMenuRoot = new("All Apps", string.Empty);
+    private byte[]? _launcherFolderIconPngBytes;
+    private Bitmap? _launcherFolderIconBitmap;
+
+    private int _targetShortSideCells;
+    private bool _isSettingsOpen = true;
+    private bool _isNightMode;
+    private bool _enableDynamicTaskbarActions;
+    private bool _suppressThemeToggleEvents;
+    private bool _suppressLanguageSelectionEvents;
+    private bool _suppressTimeZoneSelectionEvents;
+    private bool _suppressWeatherLocationEvents;
+    private bool _suppressSettingsPersistence;
+    private bool _suppressGridSpacingEvents;
+    private bool _suppressGridInsetEvents;
+    private bool _suppressStatusBarSpacingEvents;
+    private bool _suppressAutoStartToggleEvents;
+    private bool _isUpdatingWallpaperPreviewLayout;
+    private IBrush? _defaultDesktopBackground;
+    private Bitmap? _wallpaperBitmap;
+    private WallpaperMediaType _wallpaperMediaType;
+    private string? _wallpaperVideoPath;
+    private MediaPlayer? _previewVideoWallpaperPlayer;
+    private Media? _previewVideoWallpaperMedia;
+    private LibVLC? _libVlc;
+    private string? _wallpaperPath;
+    private string _wallpaperStatus = "Current background uses solid color.";
+    private IReadOnlyList<Color> _recommendedColors = Array.Empty<Color>();
+    private IReadOnlyList<Color> _monetColors = Array.Empty<Color>();
+    private Color _selectedThemeColor = Color.Parse("#FF3B82F6");
+    private double _currentDesktopCellSize;
+    private double _currentDesktopCellGap;
+    private double _currentDesktopEdgeInset;
+    private string _gridSpacingPreset = "Relaxed";
+    private string _statusBarSpacingMode = "Relaxed";
+    private int _statusBarCustomSpacingPercent = 12;
+    private int _desktopEdgeInsetPercent = DefaultEdgeInsetPercent;
+    private string _taskbarLayoutMode = TaskbarLayoutBottomFullRowMacStyle;
+    private string _languageCode = "zh-CN";
+    private WeatherLocationMode _weatherLocationMode = WeatherLocationMode.CitySearch;
+    private string _weatherLocationKey = string.Empty;
+    private string _weatherLocationName = string.Empty;
+    private double _weatherLatitude = 39.9042;
+    private double _weatherLongitude = 116.4074;
+    private bool _weatherAutoRefreshLocation;
+    private string _weatherExcludedAlertsRaw = string.Empty;
+    private string _weatherIconPackId = "FluentRegular";
+    private bool _weatherNoTlsRequests;
+    private bool _autoStartWithWindows;
+    private string _weatherSearchKeyword = string.Empty;
+    private bool _isWeatherSearchInProgress;
+    private bool _isWeatherPreviewInProgress;
+
+    public SettingsWindow()
+    {
+        InitializeComponent();
+        _fluentAvaloniaTheme = Application.Current?.Styles.OfType<FluentAvaloniaTheme>().FirstOrDefault();
+        RequestedThemeVariant = Application.Current?.RequestedThemeVariant ?? ThemeVariant.Default;
+        HookEvents();
+    }
+
+    private void InitializeComponent()
+    {
+        AvaloniaXamlLoader.Load(this);
+    }
+
+    private void HookEvents()
+    {
+        PickWallpaperButton.Click += OnPickWallpaperClick;
+        ClearWallpaperButton.Click += OnClearWallpaperClick;
+        WallpaperPlacementComboBox.SelectionChanged += OnWallpaperPlacementSelectionChanged;
+        GridSizeSlider.ValueChanged += OnGridSizeSliderChanged;
+        GridSpacingPresetComboBox.SelectionChanged += OnGridSpacingPresetSelectionChanged;
+        GridEdgeInsetSlider.ValueChanged += OnGridEdgeInsetSliderChanged;
+        ApplyGridButton.Click += OnApplyGridSizeClick;
+        NightModeToggleSwitch.Checked += OnNightModeChecked;
+        NightModeToggleSwitch.Unchecked += OnNightModeUnchecked;
+        RecommendedColorButton1.Click += OnRecommendedColorClick;
+        RecommendedColorButton2.Click += OnRecommendedColorClick;
+        RecommendedColorButton3.Click += OnRecommendedColorClick;
+        RecommendedColorButton4.Click += OnRecommendedColorClick;
+        RecommendedColorButton5.Click += OnRecommendedColorClick;
+        RecommendedColorButton6.Click += OnRecommendedColorClick;
+        RefreshMonetColorsButton.Click += OnRefreshMonetColorsClick;
+        MonetColorButton1.Click += OnMonetColorClick;
+        MonetColorButton2.Click += OnMonetColorClick;
+        MonetColorButton3.Click += OnMonetColorClick;
+        MonetColorButton4.Click += OnMonetColorClick;
+        MonetColorButton5.Click += OnMonetColorClick;
+        MonetColorButton6.Click += OnMonetColorClick;
+        StatusBarClockToggleSwitch.Checked += OnStatusBarClockChecked;
+        StatusBarClockToggleSwitch.Unchecked += OnStatusBarClockUnchecked;
+        ClockFormatHMSSRadio.Checked += OnClockFormatChanged;
+        ClockFormatHMRadio.Checked += OnClockFormatChanged;
+        StatusBarSpacingModeComboBox.SelectionChanged += OnStatusBarSpacingModeChanged;
+        StatusBarSpacingSlider.ValueChanged += OnStatusBarSpacingSliderChanged;
+        WeatherPreviewButton.Click += OnTestWeatherRequestClick;
+        WeatherLocationModeComboBox.SelectionChanged += OnWeatherLocationModeSelectionChanged;
+        WeatherLocationModeChipListBox.SelectionChanged += OnWeatherLocationModeChipSelectionChanged;
+        WeatherAutoRefreshToggleSwitch.Checked += OnWeatherAutoRefreshToggled;
+        WeatherAutoRefreshToggleSwitch.Unchecked += OnWeatherAutoRefreshToggled;
+        WeatherSearchButton.Click += OnSearchWeatherCityClick;
+        WeatherApplyCityButton.Click += OnApplyWeatherCitySelectionClick;
+        WeatherApplyCoordinatesButton.Click += OnApplyWeatherCoordinatesClick;
+        WeatherExcludedAlertsTextBox.LostFocus += OnWeatherExcludedAlertsLostFocus;
+        WeatherIconPackComboBox.SelectionChanged += OnWeatherIconPackSelectionChanged;
+        WeatherNoTlsToggleSwitch.Checked += OnWeatherNoTlsToggled;
+        WeatherNoTlsToggleSwitch.Unchecked += OnWeatherNoTlsToggled;
+        LanguageComboBox.SelectionChanged += OnLanguageSelectionChanged;
+        TimeZoneComboBox.SelectionChanged += OnTimeZoneSelectionChanged;
+        AutoCheckUpdatesToggleSwitch.Checked += OnAutoCheckUpdatesToggled;
+        AutoCheckUpdatesToggleSwitch.Unchecked += OnAutoCheckUpdatesToggled;
+        UpdateChannelChipListBox.SelectionChanged += OnUpdateChannelSelectionChanged;
+        CheckForUpdatesButton.Click += OnCheckForUpdatesClick;
+        DownloadAndInstallUpdateButton.Click += OnDownloadAndInstallUpdateClick;
+        AutoStartWithWindowsToggleSwitch.Checked += OnAutoStartWithWindowsToggled;
+        AutoStartWithWindowsToggleSwitch.Unchecked += OnAutoStartWithWindowsToggled;
+        Opened += OnWindowOpened;
+    }
+
+    private void OnWindowOpened(object? sender, EventArgs e)
+    {
+        Opened -= OnWindowOpened;
+        _suppressSettingsPersistence = true;
+        var snapshot = _appSettingsService.Load();
+        var launcherSnapshot = _launcherSettingsService.Load();
+
+        _targetShortSideCells = Math.Clamp(
+            snapshot.GridShortSideCells > 0 ? snapshot.GridShortSideCells : CalculateDefaultShortSideCellCountFromDpi(),
+            MinShortSideCells,
+            MaxShortSideCells);
+        _gridSpacingPreset = NormalizeGridSpacingPreset(snapshot.GridSpacingPreset);
+        _desktopEdgeInsetPercent = Math.Clamp(snapshot.DesktopEdgeInsetPercent, MinEdgeInsetPercent, MaxEdgeInsetPercent);
+        _statusBarSpacingMode = NormalizeStatusBarSpacingMode(snapshot.StatusBarSpacingMode);
+        _statusBarCustomSpacingPercent = Math.Clamp(snapshot.StatusBarCustomSpacingPercent, 0, 30);
+        GridSizeNumberBox.Value = _targetShortSideCells;
+        GridSizeSlider.Value = _targetShortSideCells;
+        GridSpacingPresetComboBox.SelectedIndex = string.Equals(_gridSpacingPreset, "Compact", StringComparison.OrdinalIgnoreCase) ? 1 : 0;
+        GridEdgeInsetSlider.Value = _desktopEdgeInsetPercent;
+        GridEdgeInsetNumberBox.Value = _desktopEdgeInsetPercent;
+        StatusBarSpacingModeComboBox.SelectedIndex = _statusBarSpacingMode switch
+        {
+            "Compact" => 0,
+            "Custom" => 2,
+            _ => 1
+        };
+        StatusBarSpacingSlider.Value = _statusBarCustomSpacingPercent;
+        StatusBarSpacingNumberBox.Value = _statusBarCustomSpacingPercent;
+        StatusBarSpacingCustomPanel.IsVisible = string.Equals(_statusBarSpacingMode, "Custom", StringComparison.OrdinalIgnoreCase);
+        GridEdgeInsetNumberBox.ValueChanged += OnGridEdgeInsetNumberBoxChanged;
+        StatusBarSpacingNumberBox.ValueChanged += OnStatusBarSpacingNumberBoxChanged;
+        ApplyTaskbarSettings(snapshot);
+        InitializeLocalization(snapshot.LanguageCode);
+        InitializeWeatherSettings(snapshot);
+        InitializeAutoStartWithWindowsSetting(snapshot);
+        InitializeUpdateSettings(snapshot);
+        InitializeLauncherVisibilitySettings(launcherSnapshot);
+        InitializeSettingsIcons();
+        ApplyLocalization();
+        WallpaperPlacementComboBox.SelectedIndex = GetPlacementIndexFromSetting(snapshot.WallpaperPlacement);
+        TryRestoreWallpaper(snapshot.WallpaperPath);
+        RefreshColorPalettes();
+        if (TryParseColor(snapshot.ThemeColor, out var savedThemeColor))
+        {
+            _selectedThemeColor = savedThemeColor;
+        }
+
+        _isNightMode = snapshot.IsNightMode ?? (CalculateCurrentBackgroundLuminance() < LightBackgroundLuminanceThreshold);
+        ApplyNightModeState(_isNightMode, refreshPalettes: false);
+        EnsureSelectedThemeColor();
+        UpdateThemeColorSelectionState();
+        ThemeColorStatusTextBlock.Text = Lf("settings.color.theme_ready_format", "Theme color ready: {0}.", _selectedThemeColor);
+        WindowTitleTextBlock.Text = L("settings.title", "Settings");
+        WindowSubtitleTextBlock.Text = L("settings.footer", "LanMountainDesktop Settings");
+        _defaultDesktopBackground = DesktopWallpaperLayer.Background;
+        UpdateSettingsTabContent();
+        UpdateWallpaperDisplay();
+        UpdateWallpaperPreviewLayout();
+        UpdateGridPreviewLayout();
+        InitializeTimeZoneSettings();
+        _ = LoadLauncherEntriesAsync();
+        _suppressSettingsPersistence = false;
+    }
+
+    private void OnCloseWindowClick(object? sender, RoutedEventArgs e)
+    {
+        Close();
+    }
+}

noise.md

@@ -1,6 +1,6 @@
-# 沉浸式时钟噪音计算与评分技术文档
+# 噪音计算与评分技术文档
 
-Immersive Clock 的噪音监测系统不仅仅是一个简单的分贝计，它内置了一个基于心理声学与专注力理论的评分引擎。该引擎旨在客观、多维度地量化环境噪音对学习心流的干扰程度。
+噪音监测系统不仅仅是一个简单的分贝计，它内置了一个基于心理声学与专注力理论的评分引擎。该引擎旨在客观、多维度地量化环境噪音对学习心流的干扰程度。
 
 本文档详细解析了该系统的计算原理、核心指标定义、评分算法及完整的技术架构。
 

settings_extractor.py

@@ -0,0 +1,67 @@
+import xml.etree.ElementTree as ET
+import re
+import os
+
+axaml_path = "LanMountainDesktop/Views/MainWindow.axaml"
+with open(axaml_path, 'r', encoding='utf-8') as f:
+    axaml_content = f.read()
+
+# We'll use regex to find `<Grid x:Name="...SettingsPanel" ...>` or `<StackPanel x:Name="...SettingsPanel" ...>` ignoring WallpaperSettingsPanel
+pattern = r'(?:<Grid|<StackPanel)\s+x:Name="([A-Za-z0-9]+SettingsPanel)"[\s\S]*?(?:</Grid>|</StackPanel>)\s*'
+
+# Actually, parsing XAML with regex might be risky because of nested grids.
+# Let's count matching open/close tags.
+
+def extract_panel(content, panel_name):
+    # Find start tag
+    start_tag_regex = re.compile(r'<(Grid|StackPanel)[^>]*?x:Name="' + panel_name + r'"[^>]*?>')
+    match = start_tag_regex.search(content)
+    if not match:
+        return None, None
+    
+    start_idx = match.start()
+    tag_name = match.group(1)
+    
+    open_tag = f"<{tag_name}"
+    close_tag = f"</{tag_name}>"
+    
+    # Track nesting
+    nesting = 0
+    i = start_idx
+    while i < len(content):
+        if content.startswith(open_tag, i):
+            # check if it's not a self-closing tag!
+            # A simple heuristic: find the end of the tag
+            end_bracket = content.find('>', i)
+            if end_bracket != -1 and content[end_bracket-1] == '/':
+                # self closing, do nothing
+                pass
+            else:
+                nesting += 1
+            i += len(open_tag)
+        elif content.startswith(close_tag, i):
+            nesting -= 1
+            if nesting == 0:
+                end_idx = i + len(close_tag)
+                return content[start_idx:end_idx], (start_idx, end_idx)
+            i += len(close_tag)
+        else:
+            i += 1
+            
+    return None, None
+
+panels_to_extract = [
+    "GridSettingsPanel",
+    "ColorSettingsPanel",
+    "StatusBarSettingsPanel",
+    "WeatherSettingsPanel",
+    "RegionSettingsPanel",
+    "UpdateSettingsPanel",
+    "AboutSettingsPanel",
+    "LauncherSettingsPanel",
+    "PluginsSettingsPanel" # Might be PluginSettingsPanel, we'll check
+]
+
+# Quick check on actual names:
+all_panels = re.findall(r'x:Name="([A-Za-z0-9]+SettingsPanel)"', axaml_content)
+print("Found panels:", all_panels)