0.7.4

首先我加了CI课程表json的读取，然后把天气时钟这个老问题也修了。

LanMountainDesktop/Localization/en-US.json

@@ -38,6 +38,27 @@
     "settings.wallpaper.title":  "Wallpaper",
     "settings.wallpaper.description":  "Pick an image or video to apply as the app window wallpaper immediately.",
     "settings.wallpaper.current_label":  "Current Wallpaper",
+    "settings.wallpaper.type_label":  "Wallpaper Type",
+    "settings.wallpaper.type.image":  "Image",
+    "settings.wallpaper.type.solid_color":  "Solid Color",
+    "settings.wallpaper.type.system":  "System Wallpaper",
+    "settings.wallpaper.system.label":  "System Wallpaper",
+    "settings.wallpaper.system.unavailable":  "Unable to read system wallpaper",
+    "settings.wallpaper.refresh_interval":  "Refresh Interval",
+    "settings.wallpaper.refresh_now":  "Refresh Now",
+    "settings.wallpaper.refresh.30s":  "30 seconds",
+    "settings.wallpaper.refresh.1m":  "1 minute",
+    "settings.wallpaper.refresh.5m":  "5 minutes",
+    "settings.wallpaper.refresh.10m":  "10 minutes",
+    "settings.wallpaper.refresh.15m":  "15 minutes",
+    "settings.wallpaper.refresh.30m":  "30 minutes",
+    "settings.wallpaper.refresh.1h":  "1 hour",
+    "settings.wallpaper.refresh.2h":  "2 hours",
+    "settings.wallpaper.refresh.4h":  "4 hours",
+    "settings.wallpaper.refresh.8h":  "8 hours",
+    "settings.wallpaper.refresh.12h":  "12 hours",
+    "settings.wallpaper.refresh.24h":  "24 hours",
+    "settings.wallpaper.color_label":  "Wallpaper Color",
     "settings.wallpaper.placement_label":  "Placement",
     "settings.wallpaper.placement_desc":  "Adjust how the image fills the desktop.",
     "settings.wallpaper.pick_button":  "Browse Files",
@@ -217,7 +238,14 @@
     "schedule.settings.unnamed":  "Unnamed Schedule",
     "schedule.settings.delete":  "Delete",
     "schedule.settings.picker_title":  "Select ClassIsland schedule file",
-    "schedule.settings.picker_file_type":  "ClassIsland CSES schedule",
+    "schedule.settings.picker_file_type.all":  "ClassIsland Schedule Files",
+    "schedule.settings.picker_file_type.json":  "ClassIsland Profile (JSON)",
+    "schedule.settings.picker_file_type.cses":  "CSES Schedule (YAML)",
+    "schedule.settings.semester.title":  "Semester Settings",
+    "schedule.settings.semester.start_date":  "Semester Start Date",
+    "schedule.settings.semester.week_cycle":  "Week Cycle",
+    "schedule.settings.semester.week_cycle_desc":  "Set the week rotation cycle for multi-week schedules (e.g., 2 for odd/even weeks).",
+    "schedule.settings.semester.week_cycle_format":  "{0}-week rotation",
     "worldclock.settings.title":  "World Clock Settings",
     "worldclock.settings.desc":  "Choose a time zone for each of the four clocks.",
     "worldclock.settings.clock_1":  "Clock 1",

LanMountainDesktop/Localization/zh-CN.json

@@ -41,6 +41,23 @@
     "settings.wallpaper.type_label":  "壁纸类型",
     "settings.wallpaper.type.image":  "图片",
     "settings.wallpaper.type.solid_color":  "纯色",
+    "settings.wallpaper.type.system":  "系统壁纸",
+    "settings.wallpaper.system.label":  "系统壁纸",
+    "settings.wallpaper.system.unavailable":  "无法读取系统壁纸",
+    "settings.wallpaper.refresh_interval":  "刷新频率",
+    "settings.wallpaper.refresh_now":  "立即刷新",
+    "settings.wallpaper.refresh.30s":  "30 秒",
+    "settings.wallpaper.refresh.1m":  "1 分钟",
+    "settings.wallpaper.refresh.5m":  "5 分钟",
+    "settings.wallpaper.refresh.10m":  "10 分钟",
+    "settings.wallpaper.refresh.15m":  "15 分钟",
+    "settings.wallpaper.refresh.30m":  "30 分钟",
+    "settings.wallpaper.refresh.1h":  "1 小时",
+    "settings.wallpaper.refresh.2h":  "2 小时",
+    "settings.wallpaper.refresh.4h":  "4 小时",
+    "settings.wallpaper.refresh.8h":  "8 小时",
+    "settings.wallpaper.refresh.12h":  "12 小时",
+    "settings.wallpaper.refresh.24h":  "24 小时",
     "settings.wallpaper.color_label":  "壁纸颜色",
     "settings.wallpaper.custom_color_tooltip":  "自定义颜色",
     "settings.wallpaper.custom_color_apply":  "应用",
@@ -216,7 +233,14 @@
     "schedule.settings.unnamed":  "未命名课表",
     "schedule.settings.delete":  "删除",
     "schedule.settings.picker_title":  "选择 ClassIsland 课表文件",
-    "schedule.settings.picker_file_type":  "ClassIsland CSES 课表",
+    "schedule.settings.picker_file_type.all":  "ClassIsland 课表文件",
+    "schedule.settings.picker_file_type.json":  "ClassIsland 档案 (JSON)",
+    "schedule.settings.picker_file_type.cses":  "CSES 课表 (YAML)",
+    "schedule.settings.semester.title":  "学期设置",
+    "schedule.settings.semester.start_date":  "学期开始日期",
+    "schedule.settings.semester.week_cycle":  "周循环",
+    "schedule.settings.semester.week_cycle_desc":  "设置多周课表轮换周期，用于计算当前是第几周。",
+    "schedule.settings.semester.week_cycle_format":  "{0} 周轮换",
     "worldclock.settings.title":  "世界时钟设置",
     "worldclock.settings.desc":  "分别为四个时钟选择时区。",
     "worldclock.settings.clock_1":  "时钟 1",

LanMountainDesktop/Models/AppSettingsSnapshot.cs

@@ -33,6 +33,8 @@ public sealed class AppSettingsSnapshot
 
     public string WallpaperPlacement { get; set; } = "Fill";
 
+    public int SystemWallpaperRefreshIntervalSeconds { get; set; } = 300;
+
     public int SettingsTabIndex { get; set; } = 0;
 
     public string? SettingsTabTag { get; set; }

LanMountainDesktop/Models/ComponentSettingsSnapshot.cs

@@ -1,3 +1,4 @@
+using System;
 using System.Collections.Generic;
 
 namespace LanMountainDesktop.Models;
@@ -12,6 +13,10 @@ public sealed class ComponentSettingsSnapshot
 
     public string ActiveImportedClassScheduleId { get; set; } = string.Empty;
 
+    public DateOnly? SemesterStartDate { get; set; }
+
+    public int SemesterWeekCycle { get; set; } = 1;
+
     public bool StudyEnvironmentShowDisplayDb { get; set; } = true;
 
     public bool StudyEnvironmentShowDbfs { get; set; }

LanMountainDesktop/Services/ClassIslandScheduleDataService.cs

@@ -12,7 +12,7 @@ namespace LanMountainDesktop.Services;
 
 public interface IClassIslandScheduleDataService
 {
-    ClassIslandScheduleReadResult Load(string? inputPath = null, string? profileFileName = null);
+    ClassIslandScheduleReadResult Load(string? inputPath = null, string? profileFileName = null, DateOnly? semesterStartDate = null, int semesterWeekCycle = 1);
 
     bool TryResolveClassPlanForDate(
         ClassIslandScheduleSnapshot snapshot,
@@ -43,7 +43,7 @@ public sealed class ClassIslandScheduleDataService : IClassIslandScheduleDataSer
         .IgnoreUnmatchedProperties()
         .Build();
 
-    public ClassIslandScheduleReadResult Load(string? inputPath = null, string? profileFileName = null)
+    public ClassIslandScheduleReadResult Load(string? inputPath = null, string? profileFileName = null, DateOnly? semesterStartDate = null, int semesterWeekCycle = 1)
     {
         var warnings = new List<string>();
         try
@@ -73,11 +73,11 @@ public sealed class ClassIslandScheduleDataService : IClassIslandScheduleDataSer
             ClassIslandScheduleSnapshot snapshot;
             if (source.SourceKind == ScheduleSourceKind.Cses)
             {
-                snapshot = ParseCsesSnapshot(source);
+                snapshot = ParseCsesSnapshot(source, semesterStartDate, semesterWeekCycle);
             }
             else
             {
-                var cycleRule = ParseCycleRule(source.SettingsPath, warnings);
+                var cycleRule = ParseCycleRule(source.SettingsPath, warnings, semesterStartDate, semesterWeekCycle);
                 var profileJson = ReadJson(source.ProfilePath);
                 snapshot = ParseProfileSnapshot(profileJson.RootElement, source, cycleRule);
             }
@@ -412,22 +412,50 @@ public sealed class ClassIslandScheduleDataService : IClassIslandScheduleDataSer
         return null;
     }
 
-    private static ClassIslandScheduleCycleRule ParseCycleRule(string? settingsPath, List<string> warnings)
+    private static ClassIslandScheduleCycleRule ParseCycleRule(
+        string? settingsPath, 
+        List<string> warnings,
+        DateOnly? semesterStartDate = null,
+        int semesterWeekCycle = 1)
     {
-        if (string.IsNullOrWhiteSpace(settingsPath) || !File.Exists(settingsPath))
+        DateOnly? singleWeekStartDate = semesterStartDate;
+        int maxCycle = semesterWeekCycle > 1 ? semesterWeekCycle : 4;
+        var offsetList = new List<int> { -1, -1, 0, 0, 0, 0, 0, 0 };
+
+        if (!string.IsNullOrWhiteSpace(settingsPath) && File.Exists(settingsPath))
         {
-            warnings.Add("ClassIsland Settings.json not found, using default cycle rule.");
+            using var json = ReadJson(settingsPath);
-            return new ClassIslandScheduleCycleRule(null, 4, new List<int> { -1, -1, 0, 0, 0 });
+            var root = json.RootElement;
+            
+            if (!singleWeekStartDate.HasValue)
+            {
+                singleWeekStartDate = TryReadDateOnly(root, "SingleWeekStartTime");
+            }
+            
+            if (semesterWeekCycle <= 1)
+            {
+                maxCycle = TryReadInt(root, "MultiWeekRotationMaxCycle", 4);
+            }
+            
+            var settingsOffsetList = ReadIntList(root, "MultiWeekRotationOffset");
+            if (settingsOffsetList.Count >= 2)
+            {
+                offsetList = settingsOffsetList;
+            }
+        }
+        else
+        {
+            warnings.Add("ClassIsland Settings.json not found, using semester settings from component.");
         }
 
-        using var json = ReadJson(settingsPath);
+        if (maxCycle < 2)
-        var root = json.RootElement;
-        var singleWeekStartDate = TryReadDateOnly(root, "SingleWeekStartTime");
-        var maxCycle = TryReadInt(root, "MultiWeekRotationMaxCycle", 4);
-        var offsetList = ReadIntList(root, "MultiWeekRotationOffset");
-        if (offsetList.Count < 2)
         {
-            offsetList = new List<int> { -1, -1, 0, 0, 0 };
+            maxCycle = 2;
+        }
+
+        while (offsetList.Count <= maxCycle)
+        {
+            offsetList.Add(0);
         }
 
         return new ClassIslandScheduleCycleRule(
@@ -469,7 +497,10 @@ public sealed class ClassIslandScheduleDataService : IClassIslandScheduleDataSer
             ClassPlanGroups: groups);
     }
 
-    private static ClassIslandScheduleSnapshot ParseCsesSnapshot(ResolvedSource source)
+    private static ClassIslandScheduleSnapshot ParseCsesSnapshot(
+        ResolvedSource source,
+        DateOnly? semesterStartDate = null,
+        int semesterWeekCycle = 1)
     {
         var yaml = File.ReadAllText(source.ProfilePath);
         var csesProfile = CsesDeserializer.Deserialize<CsesProfileDto>(yaml) ?? new CsesProfileDto();
@@ -600,12 +631,19 @@ public sealed class ClassIslandScheduleDataService : IClassIslandScheduleDataSer
             [GlobalClassPlanGroupId] = new ClassIslandClassPlanGroup(GlobalClassPlanGroupId, "Global", IsGlobal: true)
         };
 
+        var maxCycle = semesterWeekCycle > 1 ? semesterWeekCycle : 4;
+        var offsetList = new List<int> { -1, -1, 0, 0, 0, 0, 0, 0 };
+        while (offsetList.Count <= maxCycle)
+        {
+            offsetList.Add(0);
+        }
+
         return new ClassIslandScheduleSnapshot(
             SourceRootPath: source.SourceRootPath,
             ProfilePath: source.ProfilePath,
             ProfileFileName: source.ProfileFileName,
             LoadedAt: DateTimeOffset.Now,
-            CycleRule: new ClassIslandScheduleCycleRule(null, 4, new List<int> { -1, -1, 0, 0, 0 }),
+            CycleRule: new ClassIslandScheduleCycleRule(semesterStartDate, Math.Clamp(maxCycle, 2, 32), offsetList),
             SelectedClassPlanGroupId: DefaultClassPlanGroupId,
             TempClassPlanGroupId: null,
             IsTempClassPlanGroupEnabled: false,

LanMountainDesktop/Services/Settings/SettingsContracts.cs

@@ -16,7 +16,13 @@ public enum WallpaperMediaType
 }
 
 public sealed record GridSettingsState(int ShortSideCells, string SpacingPreset, int EdgeInsetPercent);
-public sealed record WallpaperSettingsState(string? WallpaperPath, string Type, string? Color, string Placement, string? CustomColor = null);
+public sealed record WallpaperSettingsState(
+    string? WallpaperPath, 
+    string Type, 
+    string? Color, 
+    string Placement, 
+    string? CustomColor = null,
+    int SystemWallpaperRefreshIntervalSeconds = 300);
 public sealed record ThemeAppearanceSettingsState(
     bool IsNightMode,
     string? ThemeColor,

LanMountainDesktop/Services/Settings/SettingsDomainServices.cs

@@ -101,7 +101,9 @@ internal sealed class WallpaperSettingsService : IWallpaperSettingsService
                 : snapshot.WallpaperPath,
             normalizedType,
             snapshot.WallpaperColor,
-            snapshot.WallpaperPlacement);
+            snapshot.WallpaperPlacement,
+            CustomColor: null,
+            SystemWallpaperRefreshIntervalSeconds: NormalizeRefreshInterval(snapshot.SystemWallpaperRefreshIntervalSeconds));
     }
 
     public void Save(WallpaperSettingsState state)
@@ -128,6 +130,7 @@ internal sealed class WallpaperSettingsService : IWallpaperSettingsService
         snapshot.WallpaperPlacement = string.IsNullOrWhiteSpace(state.Placement)
             ? "Fill"
             : state.Placement.Trim();
+        snapshot.SystemWallpaperRefreshIntervalSeconds = NormalizeRefreshInterval(state.SystemWallpaperRefreshIntervalSeconds);
         _settingsService.SaveSnapshot(
             SettingsScope.App,
             snapshot,
@@ -136,9 +139,21 @@ internal sealed class WallpaperSettingsService : IWallpaperSettingsService
                 nameof(AppSettingsSnapshot.WallpaperPath),
                 nameof(AppSettingsSnapshot.WallpaperType),
                 nameof(AppSettingsSnapshot.WallpaperColor),
-                nameof(AppSettingsSnapshot.WallpaperPlacement)
+                nameof(AppSettingsSnapshot.WallpaperPlacement),
+                nameof(AppSettingsSnapshot.SystemWallpaperRefreshIntervalSeconds)
             ]);
     }
+
+    private static int NormalizeRefreshInterval(int seconds)
+    {
+        return seconds switch
+        {
+            <= 0 => 300,
+            < 30 => 30,
+            > 86400 => 86400,
+            _ => seconds
+        };
+    }
 }
 
 internal sealed class WallpaperMediaService : IWallpaperMediaService

LanMountainDesktop/Services/SystemWallpaperProvider.cs

@@ -0,0 +1,65 @@
+using System;
+using System.IO;
+using System.Runtime.InteropServices;
+using Avalonia.Media.Imaging;
+using Microsoft.Win32;
+
+namespace LanMountainDesktop.Services;
+
+public interface ISystemWallpaperProvider
+{
+    bool IsSupported { get; }
+    string? GetWallpaperPath();
+    event EventHandler? WallpaperChanged;
+}
+
+internal sealed class SystemWallpaperProvider : ISystemWallpaperProvider, IDisposable
+{
+    public bool IsSupported => RuntimeInformation.IsOSPlatform(OSPlatform.Windows);
+
+    public event EventHandler? WallpaperChanged;
+
+    public string? GetWallpaperPath()
+    {
+        if (!IsSupported)
+        {
+            return null;
+        }
+
+        try
+        {
+            using var key = Registry.CurrentUser.OpenSubKey(@"Control Panel\Desktop");
+            var wallpaperPath = key?.GetValue("Wallpaper") as string;
+
+            if (string.IsNullOrWhiteSpace(wallpaperPath))
+            {
+                return null;
+            }
+
+            if (!File.Exists(wallpaperPath))
+            {
+                return null;
+            }
+
+            return wallpaperPath;
+        }
+        catch
+        {
+            return null;
+        }
+    }
+
+    public void Dispose()
+    {
+    }
+}
+
+public static class HostSystemWallpaperProvider
+{
+    private static ISystemWallpaperProvider? _instance;
+
+    public static ISystemWallpaperProvider GetOrCreate()
+    {
+        return _instance ??= new SystemWallpaperProvider();
+    }
+}

LanMountainDesktop/Services/WallpaperImageBrushFactory.cs

@@ -5,13 +5,13 @@ using Avalonia.Media.Imaging;
 
 namespace LanMountainDesktop.Services;
 
-internal static class WallpaperImageBrushFactory
+public static class WallpaperImageBrushFactory
 {
-    internal const string Fill = "Fill";
+    public const string Fill = "Fill";
-    internal const string Fit = "Fit";
+    public const string Fit = "Fit";
-    internal const string StretchMode = "Stretch";
+    public const string StretchMode = "Stretch";
-    internal const string Center = "Center";
+    public const string Center = "Center";
-    internal const string Tile = "Tile";
+    public const string Tile = "Tile";
 
     public static string NormalizePlacement(string? placement)
     {

LanMountainDesktop/ViewModels/WallpaperSettingsPageViewModel.cs

@@ -1,7 +1,8 @@
 using System;
 using System.Collections.Generic;
-using System.Collections.ObjectModel;
+using System.IO;
 using System.Linq;
+using System.Runtime.InteropServices;
 using System.Threading.Tasks;
 using Avalonia.Media;
 using Avalonia.Media.Imaging;
@@ -15,6 +16,7 @@ namespace LanMountainDesktop.ViewModels;
 public sealed partial class WallpaperSettingsPageViewModel : ViewModelBase
 {
     private readonly ISettingsFacadeService _settingsFacade;
+    private readonly ISystemWallpaperProvider _systemWallpaperProvider;
     private readonly LocalizationService _localizationService = new();
     private readonly string _languageCode;
     private bool _isInitializing;
@@ -22,9 +24,11 @@ public sealed partial class WallpaperSettingsPageViewModel : ViewModelBase
     public WallpaperSettingsPageViewModel(ISettingsFacadeService settingsFacade)
     {
         _settingsFacade = settingsFacade;
+        _systemWallpaperProvider = HostSystemWallpaperProvider.GetOrCreate();
         _languageCode = _localizationService.NormalizeLanguageCode(_settingsFacade.Region.Get().LanguageCode);
         WallpaperPlacements = CreateWallpaperPlacements();
         WallpaperTypes = CreateWallpaperTypes();
+        RefreshIntervals = CreateRefreshIntervals();
         PresetColors = CreatePresetColors();
         RefreshLocalizedText();
 
@@ -35,8 +39,11 @@ public sealed partial class WallpaperSettingsPageViewModel : ViewModelBase
 
     public IReadOnlyList<SelectionOption> WallpaperPlacements { get; }
     public IReadOnlyList<SelectionOption> WallpaperTypes { get; }
+    public IReadOnlyList<SelectionOption> RefreshIntervals { get; }
     public IReadOnlyList<string> PresetColors { get; }
 
+    public bool IsSystemWallpaperSupported => RuntimeInformation.IsOSPlatform(OSPlatform.Windows);
+
     [ObservableProperty]
     private string _wallpaperPath = string.Empty;
 
@@ -49,6 +56,9 @@ public sealed partial class WallpaperSettingsPageViewModel : ViewModelBase
     [ObservableProperty]
     private SelectionOption _selectedWallpaperPlacement = null!;
 
+    [ObservableProperty]
+    private SelectionOption _selectedRefreshInterval = null!;
+
     [ObservableProperty]
     private string _wallpaperHeader = string.Empty;
 
@@ -73,6 +83,18 @@ public sealed partial class WallpaperSettingsPageViewModel : ViewModelBase
     [ObservableProperty]
     private string _filePickerTitle = string.Empty;
 
+    [ObservableProperty]
+    private string _systemWallpaperLabel = string.Empty;
+
+    [ObservableProperty]
+    private string _refreshIntervalLabel = string.Empty;
+
+    [ObservableProperty]
+    private string _refreshButtonTooltip = string.Empty;
+
+    [ObservableProperty]
+    private string _systemWallpaperStatus = string.Empty;
+
     [ObservableProperty]
     private bool _isImageOrVideo;
 
@@ -82,13 +104,15 @@ public sealed partial class WallpaperSettingsPageViewModel : ViewModelBase
     [ObservableProperty]
     private bool _isImage;
 
+    [ObservableProperty]
+    private bool _isSystemWallpaper;
+
     [ObservableProperty]
     private Bitmap? _previewImage;
 
     [ObservableProperty]
     private IBrush? _previewBrush;
 
-    // 自定义颜色持久化
     [ObservableProperty]
     private Color _customColor = Colors.White;
 
@@ -110,7 +134,11 @@ public sealed partial class WallpaperSettingsPageViewModel : ViewModelBase
             string.Equals(option.Value, wallpaperPlacement, StringComparison.OrdinalIgnoreCase))
             ?? WallpaperPlacements[0];
 
-        // 加载自定义颜色
+        var refreshIntervalSeconds = wallpaper.SystemWallpaperRefreshIntervalSeconds;
+        SelectedRefreshInterval = RefreshIntervals.FirstOrDefault(option =>
+            GetIntervalSeconds(option.Value) == refreshIntervalSeconds)
+            ?? RefreshIntervals[2];
+
         if (!string.IsNullOrWhiteSpace(wallpaper.CustomColor) && Color.TryParse(wallpaper.CustomColor, out var customColor))
         {
             CustomColor = customColor;
@@ -119,6 +147,7 @@ public sealed partial class WallpaperSettingsPageViewModel : ViewModelBase
 
         UpdateVisibility();
         UpdatePreviewFromCurrentSelection();
+        UpdateSystemWallpaperStatus();
     }
 
     partial void OnSelectedWallpaperTypeChanged(SelectionOption value)
@@ -132,8 +161,9 @@ public sealed partial class WallpaperSettingsPageViewModel : ViewModelBase
     private void UpdateVisibility()
     {
         IsImage = SelectedWallpaperType?.Value == "Image";
-        IsImageOrVideo = IsImage;
+        IsImageOrVideo = IsImage || SelectedWallpaperType?.Value == "SystemWallpaper";
         IsSolidColor = SelectedWallpaperType?.Value == "SolidColor";
+        IsSystemWallpaper = SelectedWallpaperType?.Value == "SystemWallpaper";
     }
 
     partial void OnSelectedColorChanged(string? value)
@@ -145,13 +175,18 @@ public sealed partial class WallpaperSettingsPageViewModel : ViewModelBase
     partial void OnCustomColorChanged(Color value)
     {
         CustomColorBrush = new SolidColorBrush(value);
-        // 将自定义颜色应用到壁纸
         var colorHex = $"#{value.A:X2}{value.R:X2}{value.G:X2}{value.B:X2}";
         SelectedColor = colorHex;
         if (_isInitializing) return;
         SaveWallpaper();
     }
 
+    partial void OnSelectedRefreshIntervalChanged(SelectionOption value)
+    {
+        if (_isInitializing) return;
+        SaveWallpaper();
+    }
+
     public async Task ImportWallpaperAsync(string sourcePath)
     {
         var importedPath = await _settingsFacade.WallpaperMedia.ImportAssetAsync(sourcePath);
@@ -170,6 +205,12 @@ public sealed partial class WallpaperSettingsPageViewModel : ViewModelBase
 
     private void UpdatePreviewFromCurrentSelection()
     {
+        if (IsSystemWallpaper)
+        {
+            UpdateSystemWallpaperPreview();
+            return;
+        }
+
         if (!IsImage)
         {
             ClearPreviewImage();
@@ -180,10 +221,24 @@ public sealed partial class WallpaperSettingsPageViewModel : ViewModelBase
         UpdatePreviewImage(WallpaperPath);
     }
 
-    private void UpdatePreviewImage(string path)
+    private void UpdateSystemWallpaperPreview()
+    {
+        var systemPath = _systemWallpaperProvider.GetWallpaperPath();
+        if (string.IsNullOrWhiteSpace(systemPath))
+        {
+            ClearPreviewImage();
+            SystemWallpaperStatus = L("settings.wallpaper.system.unavailable", "Unable to read system wallpaper");
+            return;
+        }
+
+        SystemWallpaperStatus = systemPath;
+        UpdatePreviewImage(systemPath);
+    }
+
+    private void UpdatePreviewImage(string? path)
     {
         var previousPreview = PreviewImage;
-        if (string.IsNullOrWhiteSpace(path) || !System.IO.File.Exists(path))
+        if (string.IsNullOrWhiteSpace(path) || !File.Exists(path))
         {
             previousPreview?.Dispose();
             PreviewImage = null;
@@ -193,7 +248,7 @@ public sealed partial class WallpaperSettingsPageViewModel : ViewModelBase
 
         try
         {
-            using var stream = System.IO.File.OpenRead(path);
+            using var stream = File.OpenRead(path);
             var bitmap = new Bitmap(stream);
             PreviewImage = bitmap;
             PreviewBrush = WallpaperImageBrushFactory.Create(bitmap, SelectedWallpaperPlacement?.Value);
@@ -215,9 +270,21 @@ public sealed partial class WallpaperSettingsPageViewModel : ViewModelBase
         previousPreview?.Dispose();
     }
 
+    private void UpdateSystemWallpaperStatus()
+    {
+        if (!IsSystemWallpaper) return;
+        UpdateSystemWallpaperPreview();
+    }
+
+    [RelayCommand]
+    private void RefreshSystemWallpaper()
+    {
+        UpdateSystemWallpaperPreview();
+    }
+
     partial void OnSelectedWallpaperPlacementChanged(SelectionOption value)
     {
-        if (IsImage && PreviewImage is not null)
+        if ((IsImage || IsSystemWallpaper) && PreviewImage is not null)
         {
             PreviewBrush = WallpaperImageBrushFactory.Create(PreviewImage, value?.Value);
         }
@@ -236,16 +303,46 @@ public sealed partial class WallpaperSettingsPageViewModel : ViewModelBase
     {
         var selectedType = SelectedWallpaperType?.Value ?? "Image";
         var selectedPlacement = SelectedWallpaperPlacement?.Value ?? WallpaperImageBrushFactory.Fill;
-        var normalizedPath = SelectedWallpaperType?.Value == "SolidColor" || string.IsNullOrWhiteSpace(WallpaperPath)
+        var refreshIntervalSeconds = GetIntervalSeconds(SelectedRefreshInterval?.Value);
-            ? null
+        
-            : WallpaperPath;
+        string? normalizedPath;
+        if (selectedType == "SolidColor" || selectedType == "SystemWallpaper")
+        {
+            normalizedPath = null;
+        }
+        else
+        {
+            normalizedPath = string.IsNullOrWhiteSpace(WallpaperPath) ? null : WallpaperPath;
+        }
+
         var customColorHex = $"#{CustomColor.A:X2}{CustomColor.R:X2}{CustomColor.G:X2}{CustomColor.B:X2}";
         _settingsFacade.Wallpaper.Save(new WallpaperSettingsState(
             normalizedPath,
             selectedType,
             SelectedColor,
             selectedPlacement,
-            customColorHex));
+            customColorHex,
+            refreshIntervalSeconds));
+    }
+
+    private static int GetIntervalSeconds(string? value)
+    {
+        return value switch
+        {
+            "30s" => 30,
+            "1m" => 60,
+            "5m" => 300,
+            "10m" => 600,
+            "15m" => 900,
+            "30m" => 1800,
+            "1h" => 3600,
+            "2h" => 7200,
+            "4h" => 14400,
+            "8h" => 28800,
+            "12h" => 43200,
+            "24h" => 86400,
+            _ => 300
+        };
     }
 
     private IReadOnlyList<SelectionOption> CreateWallpaperPlacements()
@@ -262,10 +359,36 @@ public sealed partial class WallpaperSettingsPageViewModel : ViewModelBase
 
     private IReadOnlyList<SelectionOption> CreateWallpaperTypes()
     {
-        return
+        var types = new List<SelectionOption>
-        [
+        {
             new SelectionOption("Image", L("settings.wallpaper.type.image", "Image")),
             new SelectionOption("SolidColor", L("settings.wallpaper.type.solid_color", "Solid Color"))
+        };
+
+        if (IsSystemWallpaperSupported)
+        {
+            types.Add(new SelectionOption("SystemWallpaper", L("settings.wallpaper.type.system", "System Wallpaper")));
+        }
+
+        return types;
+    }
+
+    private IReadOnlyList<SelectionOption> CreateRefreshIntervals()
+    {
+        return
+        [
+            new SelectionOption("30s", L("settings.wallpaper.refresh.30s", "30 seconds")),
+            new SelectionOption("1m", L("settings.wallpaper.refresh.1m", "1 minute")),
+            new SelectionOption("5m", L("settings.wallpaper.refresh.5m", "5 minutes")),
+            new SelectionOption("10m", L("settings.wallpaper.refresh.10m", "10 minutes")),
+            new SelectionOption("15m", L("settings.wallpaper.refresh.15m", "15 minutes")),
+            new SelectionOption("30m", L("settings.wallpaper.refresh.30m", "30 minutes")),
+            new SelectionOption("1h", L("settings.wallpaper.refresh.1h", "1 hour")),
+            new SelectionOption("2h", L("settings.wallpaper.refresh.2h", "2 hours")),
+            new SelectionOption("4h", L("settings.wallpaper.refresh.4h", "4 hours")),
+            new SelectionOption("8h", L("settings.wallpaper.refresh.8h", "8 hours")),
+            new SelectionOption("12h", L("settings.wallpaper.refresh.12h", "12 hours")),
+            new SelectionOption("24h", L("settings.wallpaper.refresh.24h", "24 hours"))
         ];
     }
 
@@ -289,6 +412,9 @@ public sealed partial class WallpaperSettingsPageViewModel : ViewModelBase
         WallpaperPlacementDescription = L("settings.wallpaper.placement_desc", "Adjust how the image fills the desktop.");
         ImportWallpaperButtonText = L("settings.wallpaper.pick_button", "Import Wallpaper");
         FilePickerTitle = L("filepicker.title", "Select wallpaper");
+        SystemWallpaperLabel = L("settings.wallpaper.system.label", "System Wallpaper");
+        RefreshIntervalLabel = L("settings.wallpaper.refresh_interval", "Refresh Interval");
+        RefreshButtonTooltip = L("settings.wallpaper.refresh_now", "Refresh Now");
     }
 
     private string L(string key, string fallback)

LanMountainDesktop/Views/ComponentEditors/ClassScheduleComponentEditor.axaml

@@ -2,6 +2,8 @@
              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:material="clr-namespace:Material.Styles;assembly=Material.Styles"
+             xmlns:materialAssists="clr-namespace:Material.Styles.Assists;assembly=Material.Styles"
              mc:Ignorable="d"
              x:Class="LanMountainDesktop.Views.ComponentEditors.ClassScheduleComponentEditor">
     <StackPanel Spacing="16">
@@ -36,6 +38,45 @@
             </StackPanel>
         </Border>
 
+        <Border Classes="component-editor-card"
+                Padding="20">
+            <StackPanel Spacing="16">
+                <TextBlock x:Name="SemesterSettingsHeaderTextBlock"
+                           Classes="component-editor-section-title" />
+                
+                <Grid ColumnDefinitions="*,Auto" ColumnSpacing="16">
+                    <StackPanel Spacing="8">
+                        <TextBlock x:Name="SemesterStartDateLabel"
+                                   Classes="component-editor-secondary-text" />
+                        <CalendarDatePicker x:Name="SemesterStartDatePicker"
+                                           HorizontalAlignment="Stretch"
+                                           SelectedDateChanged="OnSemesterStartDateChanged" />
+                    </StackPanel>
+                    <StackPanel Grid.Column="1" Spacing="8" Width="160">
+                        <TextBlock x:Name="WeekCycleLabel"
+                                   Classes="component-editor-secondary-text" />
+                        <ComboBox x:Name="WeekCycleComboBox"
+                                  Classes="component-editor-select"
+                                  HorizontalAlignment="Stretch"
+                                  SelectionChanged="OnWeekCycleSelectionChanged">
+                            <ComboBoxItem Content="1" Tag="1" />
+                            <ComboBoxItem Content="2" Tag="2" />
+                            <ComboBoxItem Content="3" Tag="3" />
+                            <ComboBoxItem Content="4" Tag="4" />
+                            <ComboBoxItem Content="5" Tag="5" />
+                            <ComboBoxItem Content="6" Tag="6" />
+                            <ComboBoxItem Content="7" Tag="7" />
+                        </ComboBox>
+                    </StackPanel>
+                </Grid>
+                
+                <TextBlock x:Name="WeekCycleDescription"
+                           Classes="component-editor-secondary-text"
+                           TextWrapping="Wrap"
+                           Opacity="0.7" />
+            </StackPanel>
+        </Border>
+
         <Border Classes="component-editor-card"
                 Padding="20">
             <StackPanel Spacing="12">

LanMountainDesktop/Views/ComponentEditors/ClassScheduleComponentEditor.axaml.cs

@@ -76,6 +76,11 @@ public partial class ClassScheduleComponentEditor : ComponentEditorViewBase
         FollowSystemColorSchemeItem.Content = L("component.color_scheme.follow_system", "Follow system color scheme");
         UseNativeColorSchemeItem.Content = L("component.color_scheme.native", "Use component custom color scheme");
 
+        SemesterSettingsHeaderTextBlock.Text = L("schedule.settings.semester.title", "Semester Settings");
+        SemesterStartDateLabel.Text = L("schedule.settings.semester.start_date", "Semester Start Date");
+        WeekCycleLabel.Text = L("schedule.settings.semester.week_cycle", "Week Cycle");
+        WeekCycleDescription.Text = L("schedule.settings.semester.week_cycle_desc", "Set the week rotation cycle for multi-week schedules (e.g., 2 for odd/even weeks).");
+
         AddScheduleButton.Content = L("schedule.settings.add", "Add Schedule");
         EmptyStateTextBlock.Text = L("schedule.settings.empty", "No imported schedules yet.");
 
@@ -85,9 +90,25 @@ public partial class ClassScheduleComponentEditor : ComponentEditorViewBase
             string.Equals(colorSchemeSource, ThemeAppearanceValues.ColorSchemeFollowSystem, StringComparison.OrdinalIgnoreCase)
                 ? FollowSystemColorSchemeItem
                 : UseNativeColorSchemeItem;
+
+        if (snapshot.SemesterStartDate.HasValue)
+        {
+            SemesterStartDatePicker.SelectedDate = snapshot.SemesterStartDate.Value.ToDateTime(TimeOnly.MinValue);
+        }
+
+        var weekCycle = Math.Clamp(snapshot.SemesterWeekCycle, 1, 7);
+        WeekCycleComboBox.SelectedIndex = weekCycle - 1;
+
+        UpdateWeekCycleDescription(weekCycle);
         _suppressEvents = false;
     }
 
+    private void UpdateWeekCycleDescription(int weekCycle)
+    {
+        var format = L("schedule.settings.semester.week_cycle_format", "{0}-week rotation");
+        WeekCycleDescription.Text = string.Format(format, weekCycle);
+    }
+
     private void OnColorSchemeSelectionChanged(object? sender, SelectionChangedEventArgs e)
     {
         _ = sender;
@@ -106,6 +127,39 @@ public partial class ClassScheduleComponentEditor : ComponentEditorViewBase
         SaveSnapshot(snapshot, nameof(ComponentSettingsSnapshot.ColorSchemeSource));
     }
 
+    private void OnSemesterStartDateChanged(object? sender, SelectionChangedEventArgs e)
+    {
+        if (_suppressEvents)
+        {
+            return;
+        }
+
+        var snapshot = LoadSnapshot();
+        if (SemesterStartDatePicker.SelectedDate.HasValue)
+        {
+            snapshot.SemesterStartDate = DateOnly.FromDateTime(SemesterStartDatePicker.SelectedDate.Value);
+        }
+        else
+        {
+            snapshot.SemesterStartDate = null;
+        }
+        SaveSnapshot(snapshot, nameof(ComponentSettingsSnapshot.SemesterStartDate));
+    }
+
+    private void OnWeekCycleSelectionChanged(object? sender, SelectionChangedEventArgs e)
+    {
+        if (_suppressEvents)
+        {
+            return;
+        }
+
+        var weekCycle = WeekCycleComboBox.SelectedIndex + 1;
+        var snapshot = LoadSnapshot();
+        snapshot.SemesterWeekCycle = weekCycle;
+        SaveSnapshot(snapshot, nameof(ComponentSettingsSnapshot.SemesterWeekCycle));
+        UpdateWeekCycleDescription(weekCycle);
+    }
+
     private async void OnAddScheduleClick(object? sender, RoutedEventArgs e)
     {
         _ = sender;
@@ -122,7 +176,15 @@ public partial class ClassScheduleComponentEditor : ComponentEditorViewBase
             AllowMultiple = false,
             FileTypeFilter =
             [
-                new FilePickerFileType(L("schedule.settings.picker_file_type", "ClassIsland CSES Schedule"))
+                new FilePickerFileType(L("schedule.settings.picker_file_type.all", "ClassIsland Schedule Files"))
+                {
+                    Patterns = ["*.json", "*.cses", "*.yaml", "*.yml"]
+                },
+                new FilePickerFileType(L("schedule.settings.picker_file_type.json", "ClassIsland Profile (JSON)"))
+                {
+                    Patterns = ["*.json"]
+                },
+                new FilePickerFileType(L("schedule.settings.picker_file_type.cses", "CSES Schedule (YAML)"))
                 {
                     Patterns = ["*.cses", "*.yaml", "*.yml"]
                 }

LanMountainDesktop/Views/Components/ClassScheduleWidget.axaml.cs

@@ -253,7 +253,11 @@ public partial class ClassScheduleWidget : UserControl, IDesktopComponentWidget,
         var today = DateOnly.FromDateTime(now);
 
         var importedSchedulePath = ResolveImportedSchedulePath(componentSettings);
-        var readResult = _scheduleService.Load(importedSchedulePath);
+        var readResult = _scheduleService.Load(
+            importedSchedulePath,
+            profileFileName: null,
+            semesterStartDate: componentSettings.SemesterStartDate,
+            semesterWeekCycle: componentSettings.SemesterWeekCycle);
         if (!readResult.Success || readResult.Snapshot is null)
         {
             _courseItems = Array.Empty<CourseItemViewModel>();

LanMountainDesktop/Views/Components/OfficeRecentDocumentsWidget.axaml

@@ -10,7 +10,7 @@
              x:Class="LanMountainDesktop.Views.Components.OfficeRecentDocumentsWidget">
 
     <Border x:Name="RootBorder"
-            CornerRadius="{DynamicResource DesignCornerRadiusIsland}"
+            CornerRadius="{DynamicResource DesignCornerRadiusLg}"
             Background="#2D5A8E"
             ClipToBounds="True"
             BorderThickness="0"

LanMountainDesktop/Views/Components/WeatherClockWidget.axaml.cs

@@ -213,10 +213,17 @@ public partial class WeatherClockWidget : UserControl, IDesktopComponentWidget,
             ContentGrid.ColumnDefinitions[1].Width = new GridLength(showDial ? dialSize : 0, GridUnitType.Pixel);
         }
 
-        var leftWidthFactor = Math.Clamp(leftContentWidth / 122d, 0.48, 1.35);
+        var timeTextWidth = leftContentWidth * 0.92;
-        TimeTextBlock.FontSize = Math.Clamp((metrics.PrimaryTemperatureFont * 0.74) * scale * compactFactor * leftWidthFactor, 10, 62);
+        var timeCharCount = 5;
-        DateTextBlock.FontSize = Math.Clamp(metrics.SecondaryTextFont * scale * compactFactor * leftWidthFactor, 8, 30);
+        var maxTimeFontSize = timeTextWidth / (timeCharCount * 0.58);
-        var weatherIconSize = Math.Clamp(metrics.IconFont * scale * compactFactor * leftWidthFactor, 9, 32);
+        var baseTimeFontSize = Math.Clamp(maxTimeFontSize, 12, 48);
+        var timeFontSize = Math.Clamp(baseTimeFontSize * scale * compactFactor, 10, 48);
+        TimeTextBlock.FontSize = timeFontSize;
+        
+        var dateFontSize = Math.Clamp(timeFontSize * 0.48, 8, 22);
+        DateTextBlock.FontSize = dateFontSize;
+        
+        var weatherIconSize = Math.Clamp(dateFontSize * 1.1, 10, 24);
         WeatherIconImage.Width = weatherIconSize;
         WeatherIconImage.Height = weatherIconSize;
 
@@ -226,11 +233,11 @@ public partial class WeatherClockWidget : UserControl, IDesktopComponentWidget,
         LeftStack.Width = leftContentWidth;
         LeftStack.MaxWidth = leftContentWidth;
         DateWeatherStack.MaxWidth = leftContentWidth;
-        TimeTextBlock.MaxWidth = leftContentWidth;
+        TimeTextBlock.MaxWidth = timeTextWidth;
 
-        var showDateLine = leftContentWidth >= Math.Max(40, TimeTextBlock.FontSize * 1.72);
+        var showDateLine = leftContentWidth >= Math.Max(36, timeFontSize * 1.4) && contentHeight >= 38;
         DateWeatherStack.IsVisible = showDateLine;
-        WeatherIconImage.IsVisible = showDateLine && leftContentWidth >= Math.Max(56, DateTextBlock.FontSize * 2.4);
+        WeatherIconImage.IsVisible = showDateLine && leftContentWidth >= Math.Max(48, dateFontSize * 3.2);
 
         var dateReservedWidth = WeatherIconImage.IsVisible
             ? weatherIconSize + DateWeatherStack.Spacing
@@ -477,14 +484,22 @@ public partial class WeatherClockWidget : UserControl, IDesktopComponentWidget,
             : CreateBrush("#F8FAFF");
         AnalogDialBorder.BorderBrush = CreateBrush(isNightMode ? "#34DDE7FF" : "#12000000");
 
-        TimeTextBlock.Foreground = WeatherTypographyAccessibility.CreateReadableBrush(
+        if (isNightMode)
-            isNightMode ? "#F8FBFF" : "#10131A",
+        {
-            backgroundSamples,
+            TimeTextBlock.Foreground = WeatherTypographyAccessibility.CreateReadableBrush(
-            WeatherTypographyAccessibility.WcagLargeTextContrast);
+                "#F8FBFF",
-        DateTextBlock.Foreground = WeatherTypographyAccessibility.CreateReadableBrush(
+                backgroundSamples,
-            isNightMode ? "#BCC8DD" : "#7A7E87",
+                WeatherTypographyAccessibility.WcagLargeTextContrast);
-            backgroundSamples,
+            DateTextBlock.Foreground = WeatherTypographyAccessibility.CreateReadableBrush(
-            WeatherTypographyAccessibility.WcagNormalTextContrast);
+                "#BCC8DD",
+                backgroundSamples,
+                WeatherTypographyAccessibility.WcagNormalTextContrast);
+        }
+        else
+        {
+            TimeTextBlock.Foreground = CreateBrush("#10131A");
+            DateTextBlock.Foreground = CreateBrush("#7A7E87");
+        }
 
         _hourHandLine.Stroke = CreateBrush(isNightMode ? "#F1F5FF" : "#232938");
         _minuteHandLine.Stroke = CreateBrush(isNightMode ? "#D6E0F2" : "#2F3749");

LanMountainDesktop/Views/MainWindow.SettingsHardCut.Stubs.cs

@@ -215,17 +215,21 @@ public partial class MainWindow
         string? savedWallpaperPath,
         string? type = null,
         string? color = null,
-        string? placement = null)
+        string? placement = null,
+        int systemWallpaperRefreshIntervalSeconds = 300)
     {
         _wallpaperPath = string.IsNullOrWhiteSpace(savedWallpaperPath) ? null : savedWallpaperPath;
         _wallpaperType = string.IsNullOrWhiteSpace(type) ? "Image" : type.Trim();
         _wallpaperPlacement = WallpaperImageBrushFactory.NormalizePlacement(placement);
         _wallpaperSolidColor = TryParseColor(color, out var parsedColor) ? parsedColor : null;
         _wallpaperDisplayState = WallpaperDisplayState.NoWallpaperConfigured;
+        _systemWallpaperRefreshIntervalSeconds = systemWallpaperRefreshIntervalSeconds;
 
         _wallpaperBitmap?.Dispose();
         _wallpaperBitmap = null;
 
+        StopSystemWallpaperTimer();
+
         if (string.Equals(_wallpaperType, "SolidColor", StringComparison.OrdinalIgnoreCase))
         {
             _wallpaperMediaType = WallpaperMediaType.SolidColor;
@@ -235,6 +239,14 @@ public partial class MainWindow
             return;
         }
 
+        if (string.Equals(_wallpaperType, "SystemWallpaper", StringComparison.OrdinalIgnoreCase))
+        {
+            _wallpaperMediaType = WallpaperMediaType.Image;
+            LoadSystemWallpaper();
+            StartSystemWallpaperTimer();
+            return;
+        }
+
         if (string.IsNullOrWhiteSpace(_wallpaperPath))
         {
             _wallpaperMediaType = WallpaperMediaType.None;
@@ -273,6 +285,69 @@ public partial class MainWindow
         }
     }
 
+    private void LoadSystemWallpaper()
+    {
+        var systemPath = _systemWallpaperProvider.GetWallpaperPath();
+        if (string.IsNullOrWhiteSpace(systemPath) || !File.Exists(systemPath))
+        {
+            _wallpaperDisplayState = WallpaperDisplayState.TemporarilyUnavailable;
+            _wallpaperBitmap?.Dispose();
+            _wallpaperBitmap = null;
+            return;
+        }
+
+        try
+        {
+            using var stream = File.OpenRead(systemPath);
+            _wallpaperBitmap?.Dispose();
+            _wallpaperBitmap = new Bitmap(stream);
+            _wallpaperPath = systemPath;
+            _wallpaperDisplayState = WallpaperDisplayState.CurrentValidWallpaper;
+            CacheLastValidWallpaperBitmap(systemPath);
+        }
+        catch
+        {
+            _wallpaperDisplayState = WallpaperDisplayState.TemporarilyUnavailable;
+            _wallpaperBitmap?.Dispose();
+            _wallpaperBitmap = null;
+        }
+    }
+
+    private void StartSystemWallpaperTimer()
+    {
+        StopSystemWallpaperTimer();
+
+        var intervalSeconds = Math.Clamp(_systemWallpaperRefreshIntervalSeconds, 30, 86400);
+        _systemWallpaperRefreshTimer = new DispatcherTimer
+        {
+            Interval = TimeSpan.FromSeconds(intervalSeconds)
+        };
+        _systemWallpaperRefreshTimer.Tick += OnSystemWallpaperRefreshTimerTick;
+        _systemWallpaperRefreshTimer.Start();
+    }
+
+    private void StopSystemWallpaperTimer()
+    {
+        if (_systemWallpaperRefreshTimer is not null)
+        {
+            _systemWallpaperRefreshTimer.Stop();
+            _systemWallpaperRefreshTimer.Tick -= OnSystemWallpaperRefreshTimerTick;
+            _systemWallpaperRefreshTimer = null;
+        }
+    }
+
+    private void OnSystemWallpaperRefreshTimerTick(object? sender, EventArgs e)
+    {
+        if (!string.Equals(_wallpaperType, "SystemWallpaper", StringComparison.OrdinalIgnoreCase))
+        {
+            StopSystemWallpaperTimer();
+            return;
+        }
+
+        LoadSystemWallpaper();
+        ApplyWallpaperBrush();
+    }
+
     private void ApplyWallpaperBrush()
     {
         DesktopWallpaperImageLayer.Background = null;
@@ -480,7 +555,8 @@ public partial class MainWindow
                 snapshot.WallpaperPath,
                 snapshot.WallpaperType,
                 snapshot.WallpaperColor,
-                snapshot.WallpaperPlacement);
+                snapshot.WallpaperPlacement,
+                snapshot.SystemWallpaperRefreshIntervalSeconds);
             if (!snapshot.IsNightMode.HasValue)
             {
                 _isNightMode = CalculateCurrentBackgroundLuminance() < LightBackgroundLuminanceThreshold;
@@ -523,6 +599,7 @@ public partial class MainWindow
                 ? latestWallpaperState.Color
                 : null,
             WallpaperPlacement = latestWallpaperState.Placement,
+            SystemWallpaperRefreshIntervalSeconds = latestWallpaperState.SystemWallpaperRefreshIntervalSeconds,
             LanguageCode = _languageCode,
             TimeZoneId = _timeZoneService.CurrentTimeZone.Id,
             WeatherLocationMode = latestWeatherState.LocationMode,

LanMountainDesktop/Views/MainWindow.axaml.cs

@@ -122,6 +122,9 @@ public partial class MainWindow : Window, ISettingsWindowAnchorProvider
     private Color? _wallpaperSolidColor;
     private string? _wallpaperPath;
     private string _wallpaperStatus = "Current background uses solid color.";
+    private int _systemWallpaperRefreshIntervalSeconds = 300;
+    private DispatcherTimer? _systemWallpaperRefreshTimer;
+    private readonly ISystemWallpaperProvider _systemWallpaperProvider = HostSystemWallpaperProvider.GetOrCreate();
     private IReadOnlyList<Color> _recommendedColors = Array.Empty<Color>();
     private IReadOnlyList<Color> _monetColors = Array.Empty<Color>();
     private Color _selectedThemeColor = Color.Parse("#FF3B82F6");

LanMountainDesktop/Views/SettingsPages/AboutSettingsPage.axaml

@@ -77,10 +77,10 @@
                                     <Setter Property="Margin" Value="2" />
                                 </Style>
                             </WrapPanel.Styles>
-                            <HyperlinkButton NavigateUri="https://github.com/Lincube/LanMountainDesktop">
+                            <HyperlinkButton NavigateUri="https://github.com/wwiinnddyy/LanMountainDesktop">
                                 <TextBlock Text="GitHub 仓库" />
                             </HyperlinkButton>
-                            <HyperlinkButton NavigateUri="https://github.com/Lincube/LanMountainDesktop/issues">
+                            <HyperlinkButton NavigateUri="https://github.com/wwiinnddyy/LanMountainDesktop/issues">
                                 <TextBlock Text="问题反馈" />
                             </HyperlinkButton>
                         </WrapPanel>

LanMountainDesktop/Views/SettingsPages/WallpaperSettingsPage.axaml

@@ -29,6 +29,11 @@
                                 <!-- 纯色预览 -->
                                 <Border Background="{Binding SelectedColor}" 
                                         IsVisible="{Binding IsSolidColor}" />
+                                <!-- 系统壁纸预览 -->
+                                <Border Background="#FFF6F7F9"
+                                        IsVisible="{Binding IsSystemWallpaper}">
+                                    <Border Background="{Binding PreviewBrush}" />
+                                </Border>
                             </Panel>
                         </Border>
                     </Viewbox>
@@ -135,6 +140,19 @@
                         </Button>
                     </UniformGrid>
                 </StackPanel>
+
+                <!-- 右侧：系统壁纸状态 -->
+                <StackPanel Grid.Column="1" VerticalAlignment="Center" Spacing="12" IsVisible="{Binding IsSystemWallpaper}">
+                    <TextBlock Text="{Binding SystemWallpaperLabel}"
+                               FontSize="14"
+                               FontWeight="SemiBold"
+                               Opacity="0.8" />
+                    <TextBlock Text="{Binding SystemWallpaperStatus}"
+                               FontSize="12"
+                               Opacity="0.7"
+                               TextWrapping="Wrap"
+                               MaxWidth="280" />
+                </StackPanel>
             </Grid>
 
             <Separator Classes="settings-separator" Margin="0,0,0,24" />
@@ -183,10 +201,60 @@
                 </ui:SettingsExpander.Footer>
             </ui:SettingsExpander>
 
-            <!-- 填充方式 -->
+            <!-- 系统壁纸刷新设置 -->
+            <ui:SettingsExpander Header="{Binding RefreshIntervalLabel}"
+                                 IsVisible="{Binding IsSystemWallpaper}"
+                                 Margin="0,4,0,0">
+                <ui:SettingsExpander.IconSource>
+                    <fi:SymbolIconSource Symbol="Clock" />
+                </ui:SettingsExpander.IconSource>
+                <ui:SettingsExpander.Footer>
+                    <StackPanel Orientation="Horizontal" Spacing="8">
+                        <ComboBox Width="140"
+                                  ItemsSource="{Binding RefreshIntervals}"
+                                  SelectedItem="{Binding SelectedRefreshInterval}">
+                            <ComboBox.ItemTemplate>
+                                <DataTemplate x:DataType="vm:SelectionOption">
+                                    <TextBlock Text="{Binding Label}" />
+                                </DataTemplate>
+                            </ComboBox.ItemTemplate>
+                        </ComboBox>
+                        <Button Classes="settings-accent-button"
+                                Command="{Binding RefreshSystemWallpaperCommand}"
+                                ToolTip.Tip="{Binding RefreshButtonTooltip}"
+                                VerticalAlignment="Center"
+                                Padding="12,8">
+                            <fi:SymbolIcon Symbol="ArrowSync" IconVariant="Regular" />
+                        </Button>
+                    </StackPanel>
+                </ui:SettingsExpander.Footer>
+            </ui:SettingsExpander>
+
+            <!-- 填充方式（图片和系统壁纸都显示） -->
             <ui:SettingsExpander Header="{Binding WallpaperPlacementLabel}"
                                  Description="{Binding WallpaperPlacementDescription}"
-                                 IsVisible="{Binding IsImage}"
+                                 IsVisible="{Binding IsImageOrVideo}"
+                                 Margin="0,4,0,0">
+                <ui:SettingsExpander.IconSource>
+                    <fi:SymbolIconSource Symbol="Maximize" />
+                </ui:SettingsExpander.IconSource>
+                <ui:SettingsExpander.Footer>
+                    <ComboBox Width="200"
+                              ItemsSource="{Binding WallpaperPlacements}"
+                              SelectedItem="{Binding SelectedWallpaperPlacement}">
+                        <ComboBox.ItemTemplate>
+                            <DataTemplate x:DataType="vm:SelectionOption">
+                                <TextBlock Text="{Binding Label}" />
+                            </DataTemplate>
+                        </ComboBox.ItemTemplate>
+                    </ComboBox>
+                </ui:SettingsExpander.Footer>
+            </ui:SettingsExpander>
+
+            <!-- 系统壁纸填充方式 -->
+            <ui:SettingsExpander Header="{Binding WallpaperPlacementLabel}"
+                                 Description="{Binding WallpaperPlacementDescription}"
+                                 IsVisible="{Binding IsSystemWallpaper}"
                                  Margin="0,4,0,0">
                 <ui:SettingsExpander.IconSource>
                     <fi:SymbolIconSource Symbol="Maximize" />