0.6.8

小黑板数据持久化。

.codex/environments/environment.toml

@@ -0,0 +1,16 @@
+# THIS IS AUTOGENERATED. DO NOT EDIT MANUALLY
+version = 1
+name = "LanMountainDesktop"
+
+[setup]
+script = ""
+
+[[actions]]
+name = "运行"
+icon = "run"
+command = "dotnet run --project 'C:\\Users\\USER693091\\Documents\\GitHub\\LanMountainDesktop\\LanMountainDesktop\\LanMountainDesktop.csproj"
+
+[[actions]]
+name = "构建"
+icon = "tool"
+command = "dotnet build 'C:\\Users\\USER693091\\Documents\\GitHub\\LanMountainDesktop\\LanMountainDesktop.slnx"

LanMountainDesktop.Tests/LanMountainDesktop.Tests.csproj

@@ -4,6 +4,7 @@
     <ImplicitUsings>enable</ImplicitUsings>
     <Nullable>enable</Nullable>
     <IsPackable>false</IsPackable>
+    <Version>1.0.0</Version>
   </PropertyGroup>
 
   <ItemGroup>

LanMountainDesktop.Tests/WhiteboardNotePersistenceServiceTests.cs

@@ -0,0 +1,157 @@
+using System;
+using System.IO;
+using LanMountainDesktop.Models;
+using LanMountainDesktop.Services;
+using Xunit;
+
+namespace LanMountainDesktop.Tests;
+
+public sealed class WhiteboardNotePersistenceServiceTests
+{
+    [Fact]
+    public void SaveNote_ThenLoadNote_RoundTripsSnapshot()
+    {
+        using var sandbox = new WhiteboardNotePersistenceSandbox();
+        var service = sandbox.CreateService();
+        var snapshot = CreateSampleSnapshot();
+
+        service.SaveNote("DesktopWhiteboard", "whiteboard-1", snapshot, retentionDays: 15);
+
+        var loaded = service.LoadNote("DesktopWhiteboard", "whiteboard-1", retentionDays: 15);
+
+        Assert.Single(loaded.Strokes);
+        Assert.Equal(2, loaded.Strokes[0].Points.Count);
+        Assert.Equal("#FF112233", loaded.Strokes[0].Color);
+        Assert.True(loaded.SavedUtc > DateTimeOffset.MinValue);
+    }
+
+    [Fact]
+    public void LoadNote_RemovesExpiredSnapshot_WhenRetentionExceeded()
+    {
+        using var sandbox = new WhiteboardNotePersistenceSandbox();
+        var service = sandbox.CreateService();
+
+        service.SaveNote("DesktopWhiteboard", "expired-board", CreateSampleSnapshot(), retentionDays: 7);
+        sandbox.OverrideSavedTimestamp("DesktopWhiteboard", "expired-board", DateTimeOffset.UtcNow.AddDays(-10), retentionDays: 7);
+
+        var loaded = service.LoadNote("DesktopWhiteboard", "expired-board", retentionDays: 7);
+
+        Assert.Empty(loaded.Strokes);
+        Assert.False(sandbox.Exists("DesktopWhiteboard", "expired-board"));
+    }
+
+    [Fact]
+    public void DeleteExpiredNotesBatch_RemovesExpiredRows_AndKeepsFreshRows()
+    {
+        using var sandbox = new WhiteboardNotePersistenceSandbox();
+        var service = sandbox.CreateService();
+
+        service.SaveNote("DesktopWhiteboard", "expired-a", CreateSampleSnapshot(), retentionDays: 7);
+        service.SaveNote("DesktopWhiteboard", "expired-b", CreateSampleSnapshot(), retentionDays: 7);
+        service.SaveNote("DesktopWhiteboard", "fresh-c", CreateSampleSnapshot(), retentionDays: 15);
+
+        sandbox.OverrideSavedTimestamp("DesktopWhiteboard", "expired-a", DateTimeOffset.UtcNow.AddDays(-9), retentionDays: 7);
+        sandbox.OverrideSavedTimestamp("DesktopWhiteboard", "expired-b", DateTimeOffset.UtcNow.AddDays(-8), retentionDays: 7);
+        sandbox.OverrideSavedTimestamp("DesktopWhiteboard", "fresh-c", DateTimeOffset.UtcNow.AddDays(-2), retentionDays: 15);
+
+        var deletedCount = service.DeleteExpiredNotesBatch(batchSize: 10);
+
+        Assert.Equal(2, deletedCount);
+        Assert.False(sandbox.Exists("DesktopWhiteboard", "expired-a"));
+        Assert.False(sandbox.Exists("DesktopWhiteboard", "expired-b"));
+        Assert.True(sandbox.Exists("DesktopWhiteboard", "fresh-c"));
+    }
+
+    private static WhiteboardNoteSnapshot CreateSampleSnapshot()
+    {
+        return new WhiteboardNoteSnapshot
+        {
+            Strokes =
+            [
+                new WhiteboardStrokeSnapshot
+                {
+                    Color = "#FF112233",
+                    InkThickness = 3.5d,
+                    IgnorePressure = true,
+                    Points =
+                    [
+                        new WhiteboardStylusPointSnapshot { X = 12, Y = 34, Pressure = 0.4d, Width = 2, Height = 2 },
+                        new WhiteboardStylusPointSnapshot { X = 48, Y = 64, Pressure = 0.7d, Width = 2, Height = 2 }
+                    ]
+                }
+            ]
+        };
+    }
+
+    private sealed class WhiteboardNotePersistenceSandbox : IDisposable
+    {
+        private readonly string _directoryPath = Path.Combine(
+            Path.GetTempPath(),
+            "LanMountainDesktop.WhiteboardNoteTests",
+            Guid.NewGuid().ToString("N"));
+
+        private readonly string _databasePath;
+
+        public WhiteboardNotePersistenceSandbox()
+        {
+            Directory.CreateDirectory(_directoryPath);
+            _databasePath = Path.Combine(_directoryPath, "whiteboard-tests.db");
+        }
+
+        public WhiteboardNotePersistenceService CreateService()
+        {
+            return new WhiteboardNotePersistenceService(new AppDatabaseService(_databasePath));
+        }
+
+        public void OverrideSavedTimestamp(string componentId, string placementId, DateTimeOffset savedUtc, int retentionDays)
+        {
+            var expiresUtc = savedUtc.AddDays(WhiteboardNoteRetentionPolicy.NormalizeDays(retentionDays));
+            using var connection = new AppDatabaseService(_databasePath).OpenConnection();
+            using var command = connection.CreateCommand();
+            command.CommandText = """
+                UPDATE whiteboard_notes
+                SET saved_at_utc_ms = $savedAtUtcMs,
+                    expires_at_utc_ms = $expiresAtUtcMs,
+                    updated_at_utc_ms = $updatedAtUtcMs
+                WHERE component_id = $componentId
+                  AND placement_id = $placementId;
+                """;
+            command.Parameters.AddWithValue("$savedAtUtcMs", savedUtc.ToUnixTimeMilliseconds());
+            command.Parameters.AddWithValue("$expiresAtUtcMs", expiresUtc.ToUnixTimeMilliseconds());
+            command.Parameters.AddWithValue("$updatedAtUtcMs", DateTimeOffset.UtcNow.ToUnixTimeMilliseconds());
+            command.Parameters.AddWithValue("$componentId", componentId);
+            command.Parameters.AddWithValue("$placementId", placementId);
+            command.ExecuteNonQuery();
+        }
+
+        public bool Exists(string componentId, string placementId)
+        {
+            using var connection = new AppDatabaseService(_databasePath).OpenConnection();
+            using var command = connection.CreateCommand();
+            command.CommandText = """
+                SELECT COUNT(1)
+                FROM whiteboard_notes
+                WHERE component_id = $componentId
+                  AND placement_id = $placementId;
+                """;
+            command.Parameters.AddWithValue("$componentId", componentId);
+            command.Parameters.AddWithValue("$placementId", placementId);
+            return Convert.ToInt32(command.ExecuteScalar()) > 0;
+        }
+
+        public void Dispose()
+        {
+            try
+            {
+                if (Directory.Exists(_directoryPath))
+                {
+                    Directory.Delete(_directoryPath, true);
+                }
+            }
+            catch
+            {
+                // Temporary test directories are best-effort cleanup.
+            }
+        }
+    }
+}

LanMountainDesktop/ComponentSystem/BuiltInComponentIds.cs

@@ -41,4 +41,5 @@ public static class BuiltInComponentIds
     public const string DesktopBlackboardLandscape = "DesktopBlackboardLandscape";
     public const string DesktopBrowser = "DesktopBrowser";
     public const string DesktopOfficeRecentDocuments = "DesktopOfficeRecentDocuments";
+    public const string DesktopRemovableStorage = "DesktopRemovableStorage";
 }

LanMountainDesktop/ComponentSystem/ComponentRegistry.cs

@@ -336,6 +336,15 @@ public sealed class ComponentRegistry
                 MinHeightCells: 2,
                 AllowStatusBarPlacement: false,
                 AllowDesktopPlacement: true),
+            new DesktopComponentDefinition(
+                BuiltInComponentIds.DesktopRemovableStorage,
+                "Removable Storage",
+                "Storage",
+                "File",
+                MinWidthCells: 2,
+                MinHeightCells: 2,
+                AllowStatusBarPlacement: false,
+                AllowDesktopPlacement: true),
             new DesktopComponentDefinition(
                 BuiltInComponentIds.Date,
                 "Calendar",

LanMountainDesktop/LanMountainDesktop.csproj

@@ -55,6 +55,10 @@
     <PackageReference Include="Microsoft.Extensions.DependencyInjection" Version="10.0.0" />
     <PackageReference Include="Microsoft.Extensions.Hosting.Abstractions" Version="10.0.0" />
     <PackageReference Include="Microsoft.Data.Sqlite" Version="10.0.0" />
+    <PackageReference Include="MudTools.OfficeInterop" Version="2.0.8" />
+    <PackageReference Include="MudTools.OfficeInterop.Word" Version="2.0.8" />
+    <PackageReference Include="MudTools.OfficeInterop.Excel" Version="2.0.8" />
+    <PackageReference Include="MudTools.OfficeInterop.PowerPoint" Version="2.0.8" />
 
     <PackageReference Include="PortAudioSharp2" Version="1.0.6" />
     <PackageReference Include="MaterialColorUtilities" Version="0.3.0" />

LanMountainDesktop/Localization/en-US.json

@@ -7,7 +7,12 @@
     "tray.menu.restart":  "Restart App",
     "tray.menu.exit":  "Exit App",
     "button.back_to_windows":  "Back to Windows",
+    "button.back_to_platform": "Back to {0}",
     "tooltip.back_to_windows":  "Back to Windows",
+    "tooltip.back_to_platform": "Back to {0}",
+    "platform.windows": "Windows",
+    "platform.linux": "Linux",
+    "platform.macos": "macOS",
     "tooltip.open_settings":  "Settings",
     "settings.title":  "Settings",
     "settings.shell.title":  "Settings",
@@ -86,6 +91,8 @@
     "settings.status_bar.description":  "Choose which components appear on the top status bar.",
     "settings.status_bar.clock_header":  "Clock Component",
     "settings.status_bar.clock_description":  "Display a clock on the top status bar.",
+    "settings.status_bar.clock_transparent_background_label":  "Transparent background",
+    "settings.status_bar.clock_transparent_background_desc":  "Remove the capsule background and keep only the clock text.",
     "settings.status_bar.spacing_header":  "Component Spacing",
     "settings.status_bar.spacing_desc":  "Adjust spacing between status bar components.",
     "settings.status_bar.spacing_mode_compact":  "Compact",
@@ -403,6 +410,7 @@
     "common.monet":  "Monet",
     "desktop.page_index_format":  "Desktop {0}",
     "launcher.title":  "App Launcher",
+    "launcher.folder": "Folder",
     "launcher.subtitle":  "Apps and folders from Windows Start Menu",
     "launcher.subtitle_linux":  "Installed apps discovered from Linux desktop entries",
     "launcher.empty":  "No Start Menu entries found.",
@@ -588,6 +596,19 @@
     "component.blackboard_landscape":  "Blackboard (Landscape)",
     "component.browser":  "Browser",
     "component.office_recent_documents":  "Recent Documents",
+    "whiteboard.settings.desc": "Each blackboard keeps its own note history and saves it independently.",
+    "whiteboard.settings.retention.title": "Note retention",
+    "whiteboard.settings.retention.desc": "Choose how long this blackboard should keep saved notes before expired data is removed automatically.",
+    "whiteboard.settings.retention.option": "{0} days",
+    "whiteboard.settings.instance_scope": "This retention setting is stored per blackboard component instance.",
+    "office_recent_documents.settings.desc":  "Choose which Windows and Office sources this widget should scan for recent documents.",
+    "office_recent_documents.settings.sources_title":  "Recent document sources",
+    "office_recent_documents.settings.sources_desc":  "You can combine multiple sources. Registry selection also keeps the Office interop MRU fallback available.",
+    "office_recent_documents.settings.source.registry":  "Office registry MRU",
+    "office_recent_documents.settings.source.recent_folders":  "Windows Recent folders",
+    "office_recent_documents.settings.source.jump_lists":  "Windows Jump Lists",
+    "office_recent_documents.settings.hint":  "If you disable all sources, this widget will stay empty until at least one source is enabled again.",
+    "component.removable_storage":  "Removable Storage",
     "component.holiday_calendar":  "Holiday Calendar",
     "component.study_environment":  "Environment",
     "component.study_session_control":  "Study Session Control",
@@ -789,6 +810,20 @@
     "study.environment.settings.show_display_db":  "Show display dB",
     "study.environment.settings.show_dbfs":  "Show dBFS",
     "study.environment.settings.hint":  "At least one display mode must stay enabled.",
+    "removable_storage.settings.desc":  "Show a connected USB drive with quick open and eject actions.",
+    "removable_storage.settings.behavior_title":  "Behavior",
+    "removable_storage.settings.behavior_desc":  "The widget automatically watches for removable drives and switches to the newest inserted USB drive.",
+    "removable_storage.action.open":  "Open",
+    "removable_storage.action.eject":  "Eject",
+    "removable_storage.widget.default_name":  "Removable Drive",
+    "removable_storage.widget.empty_title":  "No device inserted",
+    "removable_storage.widget.empty_subtitle":  "Insert a USB drive to show it here.",
+    "removable_storage.widget.empty_hint":  "Buttons stay disabled until a removable device is inserted.",
+    "removable_storage.widget.ready":  "Ready to open or eject.",
+    "removable_storage.widget.ejecting":  "Ejecting drive...",
+    "removable_storage.widget.eject_failed":  "Could not eject this drive. Close any files on it and try again.",
+    "removable_storage.widget.open_failed":  "Failed to open this drive.",
+    "removable_storage.widget.refresh_failed":  "Drive list refresh failed.",
     "study.session_control.action.start":  "Start Study Session",
     "study.session_control.action.stop":  "Stop Study Session",
     "study.session_control.idle_hint":  "Tap the right button to start",

LanMountainDesktop/Localization/zh-CN.json

@@ -7,7 +7,12 @@
     "tray.menu.restart":  "重启应用",
     "tray.menu.exit":  "退出应用",
     "button.back_to_windows":  "回到Windows",
+    "button.back_to_platform": "回到{0}",
     "tooltip.back_to_windows":  "回到Windows",
+    "tooltip.back_to_platform": "回到{0}",
+    "platform.windows": "Windows",
+    "platform.linux": "Linux",
+    "platform.macos": "macOS",
     "tooltip.open_settings":  "设置",
     "settings.title":  "设置",
     "settings.shell.title":  "设置",
@@ -85,6 +90,8 @@
     "settings.status_bar.description":  "选择顶部状态栏显示的组件。",
     "settings.status_bar.clock_header":  "时间组件",
     "settings.status_bar.clock_description":  "在顶部状态栏显示时钟。",
+    "settings.status_bar.clock_transparent_background_label":  "透明背景",
+    "settings.status_bar.clock_transparent_background_desc":  "移除胶囊背景，仅保留时钟文字。",
     "settings.status_bar.spacing_header":  "组件间距",
     "settings.status_bar.spacing_desc":  "调整状态栏组件之间的间距。",
     "settings.status_bar.spacing_mode_compact":  "紧凑",
@@ -401,6 +408,7 @@
     "common.monet":  "莫奈",
     "desktop.page_index_format":  "桌面 {0}",
     "launcher.title":  "应用启动台",
+    "launcher.folder": "文件夹",
     "launcher.subtitle":  "按 Windows 开始菜单结构显示所有应用与文件夹",
     "launcher.subtitle_linux":  "显示从 Linux .desktop 条目扫描到的已安装应用",
     "launcher.empty":  "未找到开始菜单条目。",
@@ -586,6 +594,18 @@
     "component.blackboard_landscape":  "横向小黑板",
     "component.browser":  "浏览器",
     "component.office_recent_documents":  "最近文档",
+    "whiteboard.settings.desc": "每个小黑板都会独立保存自己的笔记历史。",
+    "whiteboard.settings.retention.title": "笔记保留时间",
+    "whiteboard.settings.retention.desc": "选择这个小黑板在过期笔记被自动删除前，应当保留已保存笔记多久。",
+    "whiteboard.settings.retention.option": "{0} 天",
+    "whiteboard.settings.instance_scope": "这个保留时间设置会按每个小黑板组件实例单独存储。",
+    "office_recent_documents.settings.desc":  "选择此小组件需要扫描的 Windows 和 Office 最近文档来源。",
+    "office_recent_documents.settings.sources_title":  "最近文档来源",
+    "office_recent_documents.settings.sources_desc":  "可以同时选择多个来源。勾选注册表来源时，还会保留 Office interop 的 MRU 回退。",
+    "office_recent_documents.settings.source.registry":  "Office 注册表 MRU",
+    "office_recent_documents.settings.source.recent_folders":  "Windows 最近文件夹",
+    "office_recent_documents.settings.source.jump_lists":  "Windows 跳转列表",
+    "office_recent_documents.settings.hint":  "如果关闭全部来源，此小组件会保持空白，直到再次至少启用一个来源。",
     "component.holiday_calendar":  "节假日日历",
     "component.study_environment":  "环境",
     "component.study_session_control":  "自习时段控制",
@@ -782,6 +802,21 @@
     "study.environment.value.unavailable":  "--",
     "study.environment.value.display_format":  "{0:F1} dB",
     "study.environment.value.dbfs_format":  "{0:F1} dBFS",
+    "component.removable_storage":  "可移动存储",
+    "removable_storage.settings.desc":  "在桌面上显示已连接的 U 盘，并提供打开与弹出操作。",
+    "removable_storage.settings.behavior_title":  "行为",
+    "removable_storage.settings.behavior_desc":  "组件会自动监听可移动存储设备，并优先显示最新插入的 U 盘。",
+    "removable_storage.action.open":  "打开",
+    "removable_storage.action.eject":  "弹出",
+    "removable_storage.widget.default_name":  "可移动磁盘",
+    "removable_storage.widget.empty_title":  "未插入设备",
+    "removable_storage.widget.empty_subtitle":  "插入 U 盘后会自动显示在这里。",
+    "removable_storage.widget.empty_hint":  "在插入可移动设备之前，底部按钮会保持置灰不可点击。",
+    "removable_storage.widget.ready":  "已准备好，可直接打开或弹出。",
+    "removable_storage.widget.ejecting":  "正在弹出设备...",
+    "removable_storage.widget.eject_failed":  "无法弹出该设备，请先关闭正在占用它的文件后再试。",
+    "removable_storage.widget.open_failed":  "打开该设备失败。",
+    "removable_storage.widget.refresh_failed":  "刷新可移动存储列表失败。",
     "study.environment.settings.title":  "环境组件设置",
     "study.environment.settings.desc":  "配置右侧实时噪音值显示内容。",
     "study.environment.settings.show_display_db":  "显示 display dB",

LanMountainDesktop/Models/AppSettingsSnapshot.cs

@@ -101,6 +101,8 @@ public sealed class AppSettingsSnapshot
 
     public string ClockDisplayFormat { get; set; } = "HourMinuteSecond";
 
+    public bool StatusBarClockTransparentBackground { get; set; }
+
     public string StatusBarSpacingMode { get; set; } = "Relaxed";
 
     public int StatusBarCustomSpacingPercent { get; set; } = 12;

LanMountainDesktop/Models/ComponentSettingsSnapshot.cs

@@ -58,12 +58,16 @@ public sealed class ComponentSettingsSnapshot
 
     public int WeatherAutoRefreshIntervalMinutes { get; set; } = 12;
 
+    public int WhiteboardNoteRetentionDays { get; set; } = 15;
+
     public bool Stcn24ForumAutoRefreshEnabled { get; set; } = true;
 
     public int Stcn24ForumAutoRefreshIntervalMinutes { get; set; } = 20;
 
     public string Stcn24ForumSourceType { get; set; } = Stcn24ForumSourceTypes.LatestCreated;
 
+    public List<string>? OfficeRecentDocumentsEnabledSources { get; set; }
+
     public ComponentSettingsSnapshot Clone()
     {
         var clone = (ComponentSettingsSnapshot)MemberwiseClone();
@@ -91,6 +95,9 @@ public sealed class ComponentSettingsSnapshot
         clone.WorldClockTimeZoneIds = WorldClockTimeZoneIds is { Count: > 0 }
             ? new List<string>(WorldClockTimeZoneIds)
             : [];
+        clone.OfficeRecentDocumentsEnabledSources = OfficeRecentDocumentsEnabledSources is not null
+            ? new List<string>(OfficeRecentDocumentsEnabledSources)
+            : null;
 
         return clone;
     }

LanMountainDesktop/Models/OfficeRecentDocumentSourceTypes.cs

@@ -0,0 +1,53 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+
+namespace LanMountainDesktop.Models;
+
+public static class OfficeRecentDocumentSourceTypes
+{
+    public const string Registry = "registry";
+    public const string RecentFolders = "recent_folders";
+    public const string JumpLists = "jump_lists";
+
+    public static IReadOnlyList<string> SupportedValues { get; } =
+    [
+        Registry,
+        RecentFolders,
+        JumpLists
+    ];
+
+    public static IReadOnlyList<string> DefaultValues => SupportedValues;
+
+    public static IReadOnlyList<string> NormalizeValues(IEnumerable<string>? values, bool useDefaultWhenEmpty)
+    {
+        if (values is null)
+        {
+            return useDefaultWhenEmpty ? DefaultValues : Array.Empty<string>();
+        }
+
+        var normalized = values
+            .Select(NormalizeValue)
+            .OfType<string>()
+            .Distinct(StringComparer.OrdinalIgnoreCase)
+            .ToArray();
+
+        if (normalized.Length == 0 && useDefaultWhenEmpty)
+        {
+            return DefaultValues;
+        }
+
+        return normalized;
+    }
+
+    private static string? NormalizeValue(string? value)
+    {
+        return value?.Trim().ToLowerInvariant() switch
+        {
+            Registry => Registry,
+            RecentFolders => RecentFolders,
+            JumpLists => JumpLists,
+            _ => null
+        };
+    }
+}

LanMountainDesktop/Models/WhiteboardNoteRetentionPolicy.cs

@@ -0,0 +1,23 @@
+namespace LanMountainDesktop.Models;
+
+public static class WhiteboardNoteRetentionPolicy
+{
+    public const int MinimumDays = 7;
+    public const int MaximumDays = 15;
+    public const int DefaultDays = MaximumDays;
+
+    public static int NormalizeDays(int days)
+    {
+        if (days < MinimumDays)
+        {
+            return MinimumDays;
+        }
+
+        if (days > MaximumDays)
+        {
+            return MaximumDays;
+        }
+
+        return days;
+    }
+}

LanMountainDesktop/Models/WhiteboardNoteSnapshot.cs

@@ -0,0 +1,60 @@
+using System;
+using System.Collections.Generic;
+
+namespace LanMountainDesktop.Models;
+
+public sealed class WhiteboardNoteSnapshot
+{
+    public int Version { get; set; } = 1;
+
+    public DateTimeOffset SavedUtc { get; set; }
+
+    public List<WhiteboardStrokeSnapshot> Strokes { get; set; } = [];
+
+    public WhiteboardNoteSnapshot Clone()
+    {
+        var clone = (WhiteboardNoteSnapshot)MemberwiseClone();
+        clone.Strokes = Strokes is { Count: > 0 }
+            ? new List<WhiteboardStrokeSnapshot>(Strokes.ConvertAll(stroke => stroke?.Clone() ?? new WhiteboardStrokeSnapshot()))
+            : [];
+        return clone;
+    }
+}
+
+public sealed class WhiteboardStrokeSnapshot
+{
+    public string Color { get; set; } = "#FF000000";
+
+    public double InkThickness { get; set; } = 2.5d;
+
+    public bool IgnorePressure { get; set; } = true;
+
+    public List<WhiteboardStylusPointSnapshot> Points { get; set; } = [];
+
+    public WhiteboardStrokeSnapshot Clone()
+    {
+        var clone = (WhiteboardStrokeSnapshot)MemberwiseClone();
+        clone.Points = Points is { Count: > 0 }
+            ? new List<WhiteboardStylusPointSnapshot>(Points.ConvertAll(point => point?.Clone() ?? new WhiteboardStylusPointSnapshot()))
+            : [];
+        return clone;
+    }
+}
+
+public sealed class WhiteboardStylusPointSnapshot
+{
+    public double X { get; set; }
+
+    public double Y { get; set; }
+
+    public double Pressure { get; set; } = 0.5d;
+
+    public double Width { get; set; }
+
+    public double Height { get; set; }
+
+    public WhiteboardStylusPointSnapshot Clone()
+    {
+        return (WhiteboardStylusPointSnapshot)MemberwiseClone();
+    }
+}

LanMountainDesktop/Program.cs

@@ -43,6 +43,7 @@ sealed class Program
 
         var diagnostics = StartupDiagnosticsService.Run(args);
         StartupDiagnosticsService.ShowLegacyExecutableWarningIfNeeded(diagnostics);
+        ScheduleWhiteboardNoteStartupCleanup();
 
         try
         {
@@ -88,6 +89,25 @@ sealed class Program
         return builder;
     }
 
+    private static void ScheduleWhiteboardNoteStartupCleanup()
+    {
+        _ = Task.Run(() =>
+        {
+            try
+            {
+                var deletedCount = new WhiteboardNotePersistenceService().DeleteExpiredNotesBatch(batchSize: 512);
+                if (deletedCount > 0)
+                {
+                    AppLogger.Info("Startup", $"Deleted {deletedCount} expired whiteboard notes during startup maintenance.");
+                }
+            }
+            catch (Exception ex)
+            {
+                AppLogger.Warn("Startup", "Failed to run whiteboard note startup maintenance.", ex);
+            }
+        });
+    }
+
     private static SingleInstanceService AcquireSingleInstance(int? restartParentProcessId)
     {
         var singleInstance = SingleInstanceService.CreateDefault();

LanMountainDesktop/Services/AppDatabaseService.cs

@@ -29,6 +29,16 @@ public sealed class AppDatabaseService
         _databasePath = Path.Combine(dataDirectory, "app.db");
     }
 
+    public AppDatabaseService(string databasePath)
+    {
+        if (string.IsNullOrWhiteSpace(databasePath))
+        {
+            throw new ArgumentException("Database path cannot be null or whitespace.", nameof(databasePath));
+        }
+
+        _databasePath = databasePath;
+    }
+
     public SqliteConnection OpenConnection()
     {
         var directory = Path.GetDirectoryName(_databasePath);

LanMountainDesktop/Services/ComponentSettingsService.cs

@@ -106,6 +106,8 @@ public sealed class ComponentSettingsService : IComponentInstanceSettingsStore
 
     public void DeleteForComponent(string componentId, string? placementId)
     {
+        _ = new WhiteboardNotePersistenceService().DeleteNote(componentId, placementId);
+
         if (_settingsService is not null)
         {
             _settingsService.SaveSnapshot(

LanMountainDesktop/Services/DesktopComponentEditorRegistryFactory.cs

@@ -72,6 +72,18 @@ public static class DesktopComponentEditorRegistryFactory
             [BuiltInComponentIds.DesktopStudyEnvironment] = new(
                 BuiltInComponentIds.DesktopStudyEnvironment,
                 context => new StudyEnvironmentComponentEditor(context)),
+            [BuiltInComponentIds.DesktopRemovableStorage] = new(
+                BuiltInComponentIds.DesktopRemovableStorage,
+                context => new RemovableStorageComponentEditor(context)),
+            [BuiltInComponentIds.DesktopWhiteboard] = new(
+                BuiltInComponentIds.DesktopWhiteboard,
+                context => new WhiteboardComponentEditor(context)),
+            [BuiltInComponentIds.DesktopBlackboardLandscape] = new(
+                BuiltInComponentIds.DesktopBlackboardLandscape,
+                context => new WhiteboardComponentEditor(context)),
+            [BuiltInComponentIds.DesktopOfficeRecentDocuments] = new(
+                BuiltInComponentIds.DesktopOfficeRecentDocuments,
+                context => new OfficeRecentDocumentsComponentEditor(context)),
             [BuiltInComponentIds.DesktopWeather] = CreateWeatherRegistration(BuiltInComponentIds.DesktopWeather),
             [BuiltInComponentIds.DesktopWeatherClock] = CreateWeatherRegistration(BuiltInComponentIds.DesktopWeatherClock),
             [BuiltInComponentIds.DesktopHourlyWeather] = CreateWeatherRegistration(BuiltInComponentIds.DesktopHourlyWeather),

LanMountainDesktop/Services/IWhiteboardNotePersistenceService.cs

@@ -0,0 +1,19 @@
+using System;
+using LanMountainDesktop.Models;
+
+namespace LanMountainDesktop.Services;
+
+public interface IWhiteboardNotePersistenceService
+{
+    WhiteboardNoteSnapshot LoadNote(string componentId, string? placementId, int retentionDays);
+
+    void SaveNote(string componentId, string? placementId, WhiteboardNoteSnapshot snapshot, int retentionDays);
+
+    bool DeleteNote(string componentId, string? placementId);
+
+    bool TryDeleteExpiredNote(string componentId, string? placementId, int retentionDays);
+
+    bool IsExpired(WhiteboardNoteSnapshot snapshot, int retentionDays, DateTimeOffset? now = null);
+
+    DateTimeOffset? GetExpirationUtc(WhiteboardNoteSnapshot snapshot, int retentionDays);
+}

LanMountainDesktop/Services/OfficeRecentDocumentsService.cs

@@ -1,19 +1,25 @@
 using System;
 using System.Collections.Generic;
 using System.Diagnostics;
+using System.Globalization;
 using System.IO;
 using System.Linq;
 using System.Runtime.InteropServices;
+using System.Runtime.Versioning;
 using System.Text;
-using System.Text.Json;
+using System.Text.RegularExpressions;
-using LanMountainDesktop.Services.Settings;
+using System.Threading;
+using LanMountainDesktop.Models;
 using Microsoft.Win32;
+using MudTools.OfficeInterop;
+using MudTools.OfficeInterop.Excel;
+using MudTools.OfficeInterop.Word;
 
 namespace LanMountainDesktop.Services;
 
 public interface IOfficeRecentDocumentsService
 {
-    List<OfficeRecentDocument> GetRecentDocuments(int maxCount = 20);
+    List<OfficeRecentDocument> GetRecentDocuments(int maxCount = 20, IReadOnlyCollection<string>? enabledSources = null);
     void OpenDocument(string filePath);
 }
 
@@ -25,31 +31,67 @@ public sealed class OfficeRecentDocument
     public DateTime LastModifiedTime { get; set; }
     public long FileSizeBytes { get; set; }
     public string IconGlyph { get; set; } = string.Empty;
+    internal DateTime? RecentAccessTime { get; set; }
+    internal int SourcePriority { get; set; }
+    internal int SourceOrder { get; set; }
 }
 
 public sealed class OfficeRecentDocumentsService : IOfficeRecentDocumentsService
 {
+    private const string LogCategory = "OfficeRecentDocs";
     private static readonly string[] OfficeExtensions = { ".doc", ".docx", ".dot", ".dotx", ".rtf" };
     private static readonly string[] ExcelExtensions = { ".xls", ".xlsx", ".xlsm", ".xlsb", ".csv" };
     private static readonly string[] PowerPointExtensions = { ".ppt", ".pptx", ".pptm", ".pps", ".ppsx" };
+    private static readonly Regex OfficeFilePathRegex = new(
+        @"(?:[A-Z]:\\|\\\\)[^\x00-\x1F""<>|]+?\.(?:docx?|dotx?|rtf|xlsx?|xlsm|xlsb|csv|pptx?|pptm|ppsx?)",
+        RegexOptions.IgnoreCase | RegexOptions.Compiled);
+    private static readonly Regex OfficeMruTimestampRegex = new(
+        @"\[T(?<filetime>[0-9A-F]+)\]",
+        RegexOptions.IgnoreCase | RegexOptions.Compiled);
 
-    public List<OfficeRecentDocument> GetRecentDocuments(int maxCount = 20)
+    public List<OfficeRecentDocument> GetRecentDocuments(int maxCount = 20, IReadOnlyCollection<string>? enabledSources = null)
     {
         var documents = new List<OfficeRecentDocument>();
+        var normalizedSources = OfficeRecentDocumentSourceTypes.NormalizeValues(
+            enabledSources,
+            useDefaultWhenEmpty: enabledSources is null);
 
-        // 方法1: 从注册表读取Office最近文档（最可靠）
+        if (!OperatingSystem.IsWindows() || normalizedSources.Count == 0)
+        {
+            return documents;
+        }
+
+        var useRegistry = normalizedSources.Contains(OfficeRecentDocumentSourceTypes.Registry, StringComparer.OrdinalIgnoreCase);
+        var useRecentFolders = normalizedSources.Contains(OfficeRecentDocumentSourceTypes.RecentFolders, StringComparer.OrdinalIgnoreCase);
+        var useJumpLists = normalizedSources.Contains(OfficeRecentDocumentSourceTypes.JumpLists, StringComparer.OrdinalIgnoreCase);
+
+        if (useRegistry)
+        {
             TryGetFromRegistry(documents);
+        }
 
-        // 方法2: 从Recent文件夹读取快捷方式（备用）
+        if (useRecentFolders)
+        {
             TryGetFromRecentFolders(documents);
+        }
 
-        // 方法3: 从Windows Jump List读取（如果可用）
+        if (useJumpLists)
-        TryGetFromJumpList(documents);
+        {
+            TryGetFromJumpLists(documents);
+        }
+
+        if (useRegistry && documents.Count < maxCount)
+        {
+            TryGetFromMudToolsInterop(documents);
+        }
 
         return documents
             .GroupBy(d => d.FilePath, StringComparer.OrdinalIgnoreCase)
-            .Select(g => g.OrderByDescending(d => d.LastModifiedTime).First())
+            .Select(MergeDocuments)
-            .OrderByDescending(d => d.LastModifiedTime)
+            .OrderByDescending(d => d.RecentAccessTime ?? DateTime.MinValue)
+            .ThenBy(d => d.SourcePriority)
+            .ThenBy(d => d.SourceOrder)
+            .ThenByDescending(d => d.LastModifiedTime)
             .Take(maxCount)
             .ToList();
     }
@@ -63,261 +105,587 @@ public sealed class OfficeRecentDocumentsService : IOfficeRecentDocumentsService
                 FileName = filePath,
                 UseShellExecute = true
             };
+
             Process.Start(startInfo);
         }
+        catch (Exception ex)
+        {
+            AppLogger.Warn(LogCategory, $"Failed to open Office document '{filePath}'.", ex);
+        }
+    }
+
+    private static OfficeRecentDocument MergeDocuments(IGrouping<string, OfficeRecentDocument> group)
+    {
+        var preferred = group
+            .OrderByDescending(d => d.RecentAccessTime ?? DateTime.MinValue)
+            .ThenBy(d => d.SourcePriority)
+            .ThenBy(d => d.SourceOrder)
+            .ThenByDescending(d => d.LastModifiedTime)
+            .First();
+
+        return new OfficeRecentDocument
+        {
+            FileName = preferred.FileName,
+            FilePath = preferred.FilePath,
+            Extension = preferred.Extension,
+            LastModifiedTime = group.Max(d => d.LastModifiedTime),
+            FileSizeBytes = preferred.FileSizeBytes,
+            IconGlyph = preferred.IconGlyph,
+            RecentAccessTime = group
+                .Where(d => d.RecentAccessTime.HasValue)
+                .Select(d => d.RecentAccessTime)
+                .Max(),
+            SourcePriority = preferred.SourcePriority,
+            SourceOrder = preferred.SourceOrder
+        };
+    }
+
+    [SupportedOSPlatform("windows")]
+    private void TryGetFromMudToolsInterop(List<OfficeRecentDocument> documents)
+    {
+        try
+        {
+            RunOnStaThread(() =>
+            {
+                var sourceOrder = 0;
+                TryGetFromWordInterop(documents, ref sourceOrder);
+                TryGetFromExcelInterop(documents, ref sourceOrder);
+            });
+        }
+        catch (Exception ex)
+        {
+            AppLogger.Warn(LogCategory, "MudTools.OfficeInterop recent-document read failed.", ex);
+        }
+    }
+
+    [SupportedOSPlatform("windows")]
+    private void TryGetFromWordInterop(List<OfficeRecentDocument> documents, ref int sourceOrder)
+    {
+        if (!TryGetOfficeApplication("Word.Application", out var comObject, out var createdNew))
+        {
+            return;
+        }
+
+        object? application = null;
+
+        try
+        {
+            application = WordFactory.Connection(comObject!);
+
+            if (createdNew)
+            {
+                TrySetProperty(comObject, "Visible", false);
+                TrySetProperty(application, "DisplayAlerts", WdAlertLevel.wdAlertsNone);
+            }
+
+            AddInteropRecentFiles(documents, GetPropertyValue(application, "RecentFiles"), 0, ref sourceOrder);
+        }
+        catch (Exception ex)
+        {
+            AppLogger.Warn(LogCategory, "Failed to read Word recent files via MudTools.OfficeInterop.", ex);
+        }
+        finally
+        {
+            CleanupOfficeApplication(application, comObject, createdNew);
+        }
+    }
+
+    [SupportedOSPlatform("windows")]
+    private void TryGetFromExcelInterop(List<OfficeRecentDocument> documents, ref int sourceOrder)
+    {
+        if (!TryGetOfficeApplication("Excel.Application", out var comObject, out var createdNew))
+        {
+            return;
+        }
+
+        object? application = null;
+
+        try
+        {
+            application = ExcelFactory.Connection(comObject!);
+
+            if (createdNew)
+            {
+                TrySetProperty(comObject, "Visible", false);
+                TrySetProperty(application, "DisplayAlerts", false);
+            }
+
+            AddInteropRecentFiles(documents, GetPropertyValue(application, "RecentFiles"), 0, ref sourceOrder);
+        }
+        catch (Exception ex)
+        {
+            AppLogger.Warn(LogCategory, "Failed to read Excel recent files via MudTools.OfficeInterop.", ex);
+        }
+        finally
+        {
+            CleanupOfficeApplication(application, comObject, createdNew);
+        }
+    }
+
+    private void AddInteropRecentFiles(
+        List<OfficeRecentDocument> documents,
+        object? recentFiles,
+        int sourcePriority,
+        ref int sourceOrder)
+    {
+        if (recentFiles == null)
+        {
+            return;
+        }
+
+        var count = GetIntProperty(recentFiles, "Count");
+        var itemProperty = recentFiles.GetType().GetProperty("Item");
+        if (count <= 0 || itemProperty == null)
+        {
+            return;
+        }
+
+        for (var index = 1; index <= count; index++)
+        {
+            try
+            {
+                var recentFile = itemProperty.GetValue(recentFiles, new object[] { index });
+                var filePath = GetStringProperty(recentFile, "Path");
+                AddDocumentIfExists(documents, filePath, sourcePriority, sourceOrder++, null);
+            }
+            catch
+            {
+                // Ignore a single malformed MRU entry and keep processing the rest.
+            }
+        }
+    }
+
+    [SupportedOSPlatform("windows")]
+    private static bool TryGetOfficeApplication(string progId, out object? comObject, out bool createdNew)
+    {
+        comObject = null;
+        createdNew = false;
+
+        var applicationType = Type.GetTypeFromProgID(progId, throwOnError: false);
+        if (applicationType == null)
+        {
+            return false;
+        }
+
+        try
+        {
+            comObject = Activator.CreateInstance(applicationType);
+            createdNew = comObject != null;
+            return comObject != null;
+        }
+        catch
+        {
+            return false;
+        }
+    }
+
+    [SupportedOSPlatform("windows")]
+    private static void CleanupOfficeApplication(object? application, object? comObject, bool createdNew)
+    {
+        try
+        {
+            if (createdNew && application != null)
+            {
+                InvokeParameterlessMethod(application, "Quit");
+            }
+        }
+        catch
+        {
+        }
+
+        try
+        {
+            if (application is IDisposable disposable)
+            {
+                disposable.Dispose();
+            }
+        }
+        catch
+        {
+        }
+
+        ReleaseComObject(application);
+        if (!ReferenceEquals(application, comObject))
+        {
+            ReleaseComObject(comObject);
+        }
+    }
+
+    [SupportedOSPlatform("windows")]
+    private static void ReleaseComObject(object? instance)
+    {
+        if (instance == null || !Marshal.IsComObject(instance))
+        {
+            return;
+        }
+
+        try
+        {
+            Marshal.FinalReleaseComObject(instance);
+        }
         catch
         {
         }
     }
 
-#pragma warning disable CA1416 // 平台兼容性警告
+    [SupportedOSPlatform("windows")]
+    private static void RunOnStaThread(Action action)
+    {
+        Exception? exception = null;
+        using var finished = new ManualResetEventSlim();
+
+        var thread = new Thread(() =>
+        {
+            try
+            {
+                action();
+            }
+            catch (Exception ex)
+            {
+                exception = ex;
+            }
+            finally
+            {
+                finished.Set();
+            }
+        });
+
+        thread.IsBackground = true;
+        thread.SetApartmentState(ApartmentState.STA);
+        thread.Start();
+        finished.Wait();
+
+        if (exception != null)
+        {
+            throw new InvalidOperationException("Failed to run Office interop on STA thread.", exception);
+        }
+    }
+
+    [SupportedOSPlatform("windows")]
     private void TryGetFromRegistry(List<OfficeRecentDocument> documents)
     {
         try
         {
-            // Word最近文档
+            using var officeRoot = Registry.CurrentUser.OpenSubKey(@"Software\Microsoft\Office");
-            TryGetFromOfficeRegistry(documents, @"Software\Microsoft\Office\Word\Reading Locations");
+            if (officeRoot == null)
-            TryGetFromOfficeRegistry(documents, @"Software\Microsoft\Office\16.0\Word\Reading Locations");
-            TryGetFromOfficeRegistry(documents, @"Software\Microsoft\Office\15.0\Word\Reading Locations");
-
-            // Excel最近文档
-            TryGetFromOfficeRegistry(documents, @"Software\Microsoft\Office\Excel\Reading Locations");
-            TryGetFromOfficeRegistry(documents, @"Software\Microsoft\Office\16.0\Excel\Reading Locations");
-            TryGetFromOfficeRegistry(documents, @"Software\Microsoft\Office\15.0\Excel\Reading Locations");
-
-            // PowerPoint最近文档
-            TryGetFromOfficeRegistry(documents, @"Software\Microsoft\Office\PowerPoint\Reading Locations");
-            TryGetFromOfficeRegistry(documents, @"Software\Microsoft\Office\16.0\PowerPoint\Reading Locations");
-            TryGetFromOfficeRegistry(documents, @"Software\Microsoft\Office\15.0\PowerPoint\Reading Locations");
-
-            // 通用Office最近文档
-            TryGetFromOfficeRegistry(documents, @"Software\Microsoft\Office\16.0\Common\Open Find\Microsoft Office Word");
-            TryGetFromOfficeRegistry(documents, @"Software\Microsoft\Office\16.0\Common\Open Find\Microsoft Office Excel");
-            TryGetFromOfficeRegistry(documents, @"Software\Microsoft\Office\16.0\Common\Open Find\Microsoft Office PowerPoint");
-        }
-        catch
             {
-            // 忽略注册表访问错误
+                return;
+            }
+
+            var versions = officeRoot
+                .GetSubKeyNames()
+                .Where(IsOfficeVersionKey)
+                .OrderByDescending(ParseVersionKey)
+                .ToList();
+
+            var sourceOrder = 0;
+            foreach (var version in versions)
+            {
+                TryGetFromRegistryApp(documents, version, "Word", ref sourceOrder);
+                TryGetFromRegistryApp(documents, version, "Excel", ref sourceOrder);
+                TryGetFromRegistryApp(documents, version, "PowerPoint", ref sourceOrder);
+            }
+        }
+        catch (Exception ex)
+        {
+            AppLogger.Warn(LogCategory, "Failed to read Office MRU entries from the registry.", ex);
         }
     }
 
-    private void TryGetFromOfficeRegistry(List<OfficeRecentDocument> documents, string registryPath)
+    [SupportedOSPlatform("windows")]
+    private void TryGetFromRegistryApp(List<OfficeRecentDocument> documents, string version, string appName, ref int sourceOrder)
     {
-        try
+        TryGetFromRegistryMruKey(documents, $@"Software\Microsoft\Office\{version}\{appName}\File MRU", ref sourceOrder);
+
+        using var userMruRoot = Registry.CurrentUser.OpenSubKey($@"Software\Microsoft\Office\{version}\{appName}\User MRU");
+        if (userMruRoot == null)
+        {
+            return;
+        }
+
+        foreach (var identityKey in userMruRoot.GetSubKeyNames())
+        {
+            TryGetFromRegistryMruKey(
+                documents,
+                $@"Software\Microsoft\Office\{version}\{appName}\User MRU\{identityKey}\File MRU",
+                ref sourceOrder);
+        }
+    }
+
+    [SupportedOSPlatform("windows")]
+    private void TryGetFromRegistryMruKey(List<OfficeRecentDocument> documents, string registryPath, ref int sourceOrder)
     {
         using var key = Registry.CurrentUser.OpenSubKey(registryPath);
-            if (key == null) return;
+        if (key == null)
+        {
+            return;
+        }
 
-            foreach (var subKeyName in key.GetSubKeyNames())
+        var entries = key
+            .GetValueNames()
+            .Where(name => name.StartsWith("Item ", StringComparison.OrdinalIgnoreCase))
+            .Select(name => new
             {
-                try
+                Name = name,
-                {
+                Order = ParseMruItemOrder(name),
-                    using var subKey = key.OpenSubKey(subKeyName);
+                Value = key.GetValue(name) as string
-                    if (subKey == null) continue;
+            })
+            .Where(entry => !string.IsNullOrWhiteSpace(entry.Value))
+            .OrderBy(entry => entry.Order);
 
-                    var filePath = subKey.GetValue("Path") as string;
+        foreach (var entry in entries)
-                    if (string.IsNullOrEmpty(filePath)) continue;
-
-                    AddDocumentIfExists(documents, filePath);
-                }
-                catch
         {
-                    // 忽略单个子键访问错误
+            var (filePath, recentAccessTime) = ParseOfficeMruValue(entry.Value!);
+            AddDocumentIfExists(documents, filePath, 1, sourceOrder++, recentAccessTime);
         }
     }
-        }
-        catch
-        {
-            // 忽略注册表访问错误
-        }
-    }
-#pragma warning restore CA1416 // 平台兼容性警告
 
     private void TryGetFromRecentFolders(List<OfficeRecentDocument> documents)
     {
-        var recentPaths = GetRecentFolders();
-
-        foreach (var recentPath in recentPaths)
-        {
-            if (!Directory.Exists(recentPath))
-            {
-                continue;
-            }
-
         try
         {
-                var files = Directory.GetFiles(recentPath, "*.lnk");
+            var linkFiles = GetRecentFolders()
-                foreach (var lnkPath in files)
+                .Where(Directory.Exists)
+                .SelectMany(path => Directory.EnumerateFiles(path, "*.lnk"))
+                .Select(path => new FileInfo(path))
+                .OrderByDescending(info => info.LastWriteTimeUtc)
+                .ToList();
+
+            var sourceOrder = 0;
+            foreach (var linkFile in linkFiles)
             {
-                    var targetPath = GetShortcutTarget(lnkPath);
+                var targetPath = GetShortcutTarget(linkFile.FullName);
-                    if (string.IsNullOrEmpty(targetPath))
+                AddDocumentIfExists(documents, targetPath, 2, sourceOrder++, linkFile.LastWriteTime);
+            }
+        }
+        catch (Exception ex)
         {
-                        continue;
+            AppLogger.Warn(LogCategory, "Failed to read Windows Recent shortcut folders.", ex);
+        }
     }
 
-                    AddDocumentIfExists(documents, targetPath);
+    private void TryGetFromJumpLists(List<OfficeRecentDocument> documents)
+    {
+        try
+        {
+            var jumpListFiles = GetJumpListFolders()
+                .Where(Directory.Exists)
+                .SelectMany(path => Directory.EnumerateFiles(path, "*.automaticDestinations-ms")
+                    .Concat(Directory.EnumerateFiles(path, "*.customDestinations-ms")))
+                .Select(path => new FileInfo(path))
+                .OrderByDescending(info => info.LastWriteTimeUtc)
+                .ToList();
+
+            var sourceOrder = 0;
+            foreach (var jumpListFile in jumpListFiles)
+            {
+                TryParseJumpListFile(jumpListFile, documents, ref sourceOrder);
+            }
+        }
+        catch (Exception ex)
+        {
+            AppLogger.Warn(LogCategory, "Failed to read Windows Jump Lists for Office documents.", ex);
+        }
+    }
+
+    private void TryParseJumpListFile(FileInfo jumpListFile, List<OfficeRecentDocument> documents, ref int sourceOrder)
+    {
+        try
+        {
+            var bytes = File.ReadAllBytes(jumpListFile.FullName);
+            foreach (var filePath in ExtractPossiblePaths(bytes))
+            {
+                AddDocumentIfExists(documents, filePath, 3, sourceOrder++, jumpListFile.LastWriteTime);
             }
         }
         catch
         {
-                // 忽略文件夹访问错误
+            // Ignore a single Jump List file and keep scanning the rest.
+        }
+    }
+
+    private static IEnumerable<string> ExtractPossiblePaths(byte[] bytes)
+    {
+        var paths = new HashSet<string>(StringComparer.OrdinalIgnoreCase);
+
+        foreach (var text in new[]
+                 {
+                     Encoding.Unicode.GetString(bytes),
+                     Encoding.Latin1.GetString(bytes)
+                 })
+        {
+            foreach (Match match in OfficeFilePathRegex.Matches(text))
+            {
+                var normalizedPath = NormalizeFilePath(match.Value);
+                if (!string.IsNullOrWhiteSpace(normalizedPath))
+                {
+                    paths.Add(normalizedPath);
                 }
             }
         }
 
-    private void TryGetFromJumpList(List<OfficeRecentDocument> documents)
+        return paths;
+    }
+
+    private void AddDocumentIfExists(
+        List<OfficeRecentDocument> documents,
+        string? filePath,
+        int sourcePriority,
+        int sourceOrder,
+        DateTime? recentAccessTime)
     {
         try
         {
-            // Windows Jump List存储在以下位置
+            var normalizedPath = NormalizeFilePath(filePath);
-            var appData = Environment.GetFolderPath(Environment.SpecialFolder.ApplicationData);
+            if (string.IsNullOrWhiteSpace(normalizedPath))
-            var jumpListPath = Path.Combine(
-                Environment.GetFolderPath(Environment.SpecialFolder.LocalApplicationData),
-                "Microsoft", "Windows", "Recent", "AutomaticDestinations");
-
-            if (!Directory.Exists(jumpListPath)) return;
-
-            // Office应用的Jump List文件
-            var officeJumpListFiles = new[]
-            {
-                "a7bd7a3f3d5a4c74.automaticDestinations-ms", // Word
-                "9b524fe3be704a4d.automaticDestinations-ms", // Excel
-                "d0063c4c7de64e5e.automaticDestinations-ms"  // PowerPoint
-            };
-
-            foreach (var jumpFile in officeJumpListFiles)
-            {
-                var fullPath = Path.Combine(jumpListPath, jumpFile);
-                if (File.Exists(fullPath))
-                {
-                    TryParseJumpListFile(fullPath, documents);
-                }
-            }
-        }
-        catch
-        {
-            // Jump List解析失败，忽略
-        }
-    }
-
-    private void TryParseJumpListFile(string jumpListPath, List<OfficeRecentDocument> documents)
-    {
-        try
-        {
-            // Jump List文件是二进制格式，这里使用简化的方法
-            // 读取文件并尝试提取文件路径
-            var bytes = File.ReadAllBytes(jumpListPath);
-            var text = Encoding.Unicode.GetString(bytes);
-
-            // 查找可能的文件路径（简化实现）
-            var possiblePaths = ExtractPossiblePaths(text);
-            foreach (var path in possiblePaths)
-            {
-                AddDocumentIfExists(documents, path);
-            }
-        }
-        catch
-        {
-            // Jump List解析失败，忽略
-        }
-    }
-
-    private IEnumerable<string> ExtractPossiblePaths(string text)
-    {
-        var paths = new List<string>();
-
-        // 查找常见的文件路径模式
-        var patterns = new[]
-        {
-            @"[A-Z]:\\[^\x00-\x1F""<>|]*\.(docx?|xlsx?|pptx?|rtf|csv)",
-            @"\\\\[^\\]+\\[^\x00-\x1F""<>|]*\.(docx?|xlsx?|pptx?|rtf|csv)"
-        };
-
-        foreach (var pattern in patterns)
-        {
-            try
-            {
-                var matches = System.Text.RegularExpressions.Regex.Matches(text, pattern,
-                    System.Text.RegularExpressions.RegexOptions.IgnoreCase);
-
-                foreach (System.Text.RegularExpressions.Match match in matches)
-                {
-                    var path = match.Value.Trim('\0', ' ', '"');
-                    if (!string.IsNullOrEmpty(path))
-                    {
-                        paths.Add(path);
-                    }
-                }
-            }
-            catch
-            {
-                // 忽略正则表达式错误
-            }
-        }
-
-        return paths.Distinct(StringComparer.OrdinalIgnoreCase);
-    }
-
-    private void AddDocumentIfExists(List<OfficeRecentDocument> documents, string filePath)
-    {
-        try
-        {
-            var extension = Path.GetExtension(filePath).ToLowerInvariant();
-            if (!IsOfficeFile(extension))
             {
                 return;
             }
 
-            if (!File.Exists(filePath))
+            var extension = Path.GetExtension(normalizedPath).ToLowerInvariant();
+            if (!IsOfficeFile(extension) || !File.Exists(normalizedPath))
             {
                 return;
             }
 
-            var fileInfo = new FileInfo(filePath);
+            var fileInfo = new FileInfo(normalizedPath);
-            var doc = new OfficeRecentDocument
+            documents.Add(new OfficeRecentDocument
             {
-                FileName = Path.GetFileNameWithoutExtension(filePath),
+                FileName = Path.GetFileNameWithoutExtension(normalizedPath),
-                FilePath = filePath,
+                FilePath = normalizedPath,
                 Extension = extension,
                 LastModifiedTime = fileInfo.LastWriteTime,
                 FileSizeBytes = fileInfo.Length,
-                IconGlyph = GetIconGlyph(extension)
+                IconGlyph = GetIconGlyph(extension),
-            };
+                RecentAccessTime = recentAccessTime,
-
+                SourcePriority = sourcePriority,
-            if (!documents.Any(d => string.Equals(d.FilePath, filePath, StringComparison.OrdinalIgnoreCase)))
+                SourceOrder = sourceOrder
-            {
+            });
-                documents.Add(doc);
-            }
         }
         catch
         {
-            // 忽略单个文件处理错误
+            // Ignore a single file and keep processing the rest of the MRU list.
         }
     }
 
-    private static List<string> GetRecentFolders()
+    private static IEnumerable<string> GetRecentFolders()
     {
-        var folders = new List<string>();
-
         var appData = Environment.GetFolderPath(Environment.SpecialFolder.ApplicationData);
-        folders.Add(Path.Combine(appData, "Microsoft", "Word", "Recent"));
-        folders.Add(Path.Combine(appData, "Microsoft", "Excel", "Recent"));
-        folders.Add(Path.Combine(appData, "Microsoft", "PowerPoint", "Recent"));
-
-        // 添加Office 365路径
         var localAppData = Environment.GetFolderPath(Environment.SpecialFolder.LocalApplicationData);
-        folders.Add(Path.Combine(localAppData, "Microsoft", "Office", "Word", "Recent"));
-        folders.Add(Path.Combine(localAppData, "Microsoft", "Office", "Excel", "Recent"));
-        folders.Add(Path.Combine(localAppData, "Microsoft", "Office", "PowerPoint", "Recent"));
 
-        return folders;
+        return new[]
+        {
+            Path.Combine(appData, "Microsoft", "Windows", "Recent"),
+            Path.Combine(appData, "Microsoft", "Word", "Recent"),
+            Path.Combine(appData, "Microsoft", "Excel", "Recent"),
+            Path.Combine(appData, "Microsoft", "PowerPoint", "Recent"),
+            Path.Combine(localAppData, "Microsoft", "Office", "Word", "Recent"),
+            Path.Combine(localAppData, "Microsoft", "Office", "Excel", "Recent"),
+            Path.Combine(localAppData, "Microsoft", "Office", "PowerPoint", "Recent")
+        }.Distinct(StringComparer.OrdinalIgnoreCase);
+    }
+
+    private static IEnumerable<string> GetJumpListFolders()
+    {
+        var appData = Environment.GetFolderPath(Environment.SpecialFolder.ApplicationData);
+        var localAppData = Environment.GetFolderPath(Environment.SpecialFolder.LocalApplicationData);
+
+        return new[]
+        {
+            Path.Combine(appData, "Microsoft", "Windows", "Recent", "AutomaticDestinations"),
+            Path.Combine(appData, "Microsoft", "Windows", "Recent", "CustomDestinations"),
+            Path.Combine(localAppData, "Microsoft", "Windows", "Recent", "AutomaticDestinations"),
+            Path.Combine(localAppData, "Microsoft", "Windows", "Recent", "CustomDestinations")
+        }.Distinct(StringComparer.OrdinalIgnoreCase);
+    }
+
+    private static bool IsOfficeVersionKey(string keyName)
+    {
+        return Version.TryParse(keyName, out _);
+    }
+
+    private static Version ParseVersionKey(string keyName)
+    {
+        return Version.TryParse(keyName, out var version) ? version : new Version(0, 0);
+    }
+
+    private static int ParseMruItemOrder(string valueName)
+    {
+        var numberText = valueName["Item ".Length..];
+        return int.TryParse(numberText, NumberStyles.Integer, CultureInfo.InvariantCulture, out var number)
+            ? number
+            : int.MaxValue;
+    }
+
+    private static (string? FilePath, DateTime? RecentAccessTime) ParseOfficeMruValue(string rawValue)
+    {
+        var filePath = ExtractOfficeFilePath(rawValue);
+        DateTime? recentAccessTime = null;
+
+        var timestampMatch = OfficeMruTimestampRegex.Match(rawValue);
+        if (timestampMatch.Success &&
+            long.TryParse(timestampMatch.Groups["filetime"].Value, NumberStyles.HexNumber, CultureInfo.InvariantCulture, out var fileTime) &&
+            fileTime > 0)
+        {
+            try
+            {
+                recentAccessTime = DateTime.FromFileTimeUtc(fileTime).ToLocalTime();
+            }
+            catch
+            {
+                recentAccessTime = null;
+            }
+        }
+
+        return (filePath, recentAccessTime);
+    }
+
+    private static string? ExtractOfficeFilePath(string rawValue)
+    {
+        if (string.IsNullOrWhiteSpace(rawValue))
+        {
+            return null;
+        }
+
+        var markerIndex = rawValue.LastIndexOf('*');
+        var candidate = markerIndex >= 0
+            ? rawValue[(markerIndex + 1)..]
+            : rawValue;
+
+        var normalizedCandidate = NormalizeFilePath(candidate);
+        if (!string.IsNullOrWhiteSpace(normalizedCandidate) && IsOfficeFile(Path.GetExtension(normalizedCandidate)))
+        {
+            return normalizedCandidate;
+        }
+
+        var match = OfficeFilePathRegex.Match(rawValue);
+        return match.Success ? NormalizeFilePath(match.Value) : null;
+    }
+
+    private static string? NormalizeFilePath(string? rawPath)
+    {
+        if (string.IsNullOrWhiteSpace(rawPath))
+        {
+            return null;
+        }
+
+        var candidate = rawPath.Trim('\0', ' ', '"');
+        candidate = Environment.ExpandEnvironmentVariables(candidate);
+
+        if (Uri.TryCreate(candidate, UriKind.Absolute, out var uri) && uri.IsFile)
+        {
+            candidate = uri.LocalPath;
+        }
+
+        candidate = candidate.Replace('/', '\\');
+        return string.IsNullOrWhiteSpace(candidate) ? null : candidate;
     }
 
     private static bool IsOfficeFile(string extension)
     {
-        return OfficeExtensions.Contains(extension) ||
+        return OfficeExtensions.Contains(extension, StringComparer.OrdinalIgnoreCase) ||
-               ExcelExtensions.Contains(extension) ||
+               ExcelExtensions.Contains(extension, StringComparer.OrdinalIgnoreCase) ||
-               PowerPointExtensions.Contains(extension);
+               PowerPointExtensions.Contains(extension, StringComparer.OrdinalIgnoreCase);
     }
 
     private static string GetIconGlyph(string extension)
@@ -335,4 +703,40 @@ public sealed class OfficeRecentDocumentsService : IOfficeRecentDocumentsService
     {
         return ShortcutHelper.GetShortcutTarget(lnkPath);
     }
+
+    private static object? GetPropertyValue(object? instance, string propertyName)
+    {
+        return instance?.GetType().GetProperty(propertyName)?.GetValue(instance);
+    }
+
+    private static string? GetStringProperty(object? instance, string propertyName)
+    {
+        return GetPropertyValue(instance, propertyName) as string;
+    }
+
+    private static int GetIntProperty(object instance, string propertyName)
+    {
+        var value = GetPropertyValue(instance, propertyName);
+        return value switch
+        {
+            int intValue => intValue,
+            short shortValue => shortValue,
+            long longValue => (int)longValue,
+            _ => 0
+        };
+    }
+
+    private static void TrySetProperty(object? instance, string propertyName, object value)
+    {
+        var property = instance?.GetType().GetProperty(propertyName);
+        if (property?.CanWrite == true)
+        {
+            property.SetValue(instance, value);
+        }
+    }
+
+    private static void InvokeParameterlessMethod(object instance, string methodName)
+    {
+        instance.GetType().GetMethod(methodName, Type.EmptyTypes)?.Invoke(instance, null);
+    }
 }

LanMountainDesktop/Services/RemovableStorageService.cs

@@ -0,0 +1,310 @@
+using System;
+using System.Collections.Generic;
+using System.Diagnostics;
+using System.Globalization;
+using System.IO;
+using System.Linq;
+using System.Reflection;
+using System.Runtime.InteropServices;
+
+namespace LanMountainDesktop.Services;
+
+public sealed record RemovableStorageDrive(
+    string RootPath,
+    string DriveLetter,
+    string? VolumeLabel);
+
+public interface IRemovableStorageService
+{
+    IReadOnlyList<RemovableStorageDrive> GetConnectedDrives();
+
+    bool OpenDrive(string rootPath);
+
+    bool EjectDrive(string rootPath);
+}
+
+public sealed class RemovableStorageService : IRemovableStorageService
+{
+    public IReadOnlyList<RemovableStorageDrive> GetConnectedDrives()
+    {
+        var drives = new List<RemovableStorageDrive>();
+
+        foreach (var drive in DriveInfo.GetDrives())
+        {
+            try
+            {
+                if (drive.DriveType != DriveType.Removable || !drive.IsReady)
+                {
+                    continue;
+                }
+
+                var rootPath = NormalizeRootPath(drive.Name);
+                if (string.IsNullOrWhiteSpace(rootPath))
+                {
+                    continue;
+                }
+
+                var driveLetter = rootPath.TrimEnd(Path.DirectorySeparatorChar, Path.AltDirectorySeparatorChar);
+                var volumeLabel = string.IsNullOrWhiteSpace(drive.VolumeLabel)
+                    ? null
+                    : drive.VolumeLabel.Trim();
+
+                drives.Add(new RemovableStorageDrive(rootPath, driveLetter, volumeLabel));
+            }
+            catch (Exception ex)
+            {
+                AppLogger.Warn("RemovableStorage", $"Failed to inspect drive '{drive.Name}'.", ex);
+            }
+        }
+
+        return drives
+            .OrderBy(drive => drive.DriveLetter, StringComparer.OrdinalIgnoreCase)
+            .ToArray();
+    }
+
+    public bool OpenDrive(string rootPath)
+    {
+        var normalizedRootPath = NormalizeRootPath(rootPath);
+        if (string.IsNullOrWhiteSpace(normalizedRootPath))
+        {
+            return false;
+        }
+
+        try
+        {
+            Process.Start(new ProcessStartInfo
+            {
+                FileName = normalizedRootPath,
+                UseShellExecute = true
+            });
+            return true;
+        }
+        catch (Exception ex)
+        {
+            AppLogger.Warn("RemovableStorage", $"Failed to open drive '{normalizedRootPath}'.", ex);
+            return false;
+        }
+    }
+
+    public bool EjectDrive(string rootPath)
+    {
+        if (!OperatingSystem.IsWindows())
+        {
+            return false;
+        }
+
+        var normalizedRootPath = NormalizeRootPath(rootPath);
+        if (string.IsNullOrWhiteSpace(normalizedRootPath))
+        {
+            return false;
+        }
+
+        object? shellApplication = null;
+        object? computerFolder = null;
+        object? driveItem = null;
+
+        try
+        {
+            var shellType = Type.GetTypeFromProgID("Shell.Application");
+            if (shellType is null)
+            {
+                return false;
+            }
+
+            shellApplication = Activator.CreateInstance(shellType);
+            if (shellApplication is null)
+            {
+                return false;
+            }
+
+            computerFolder = shellType.InvokeMember(
+                "NameSpace",
+                BindingFlags.InvokeMethod,
+                binder: null,
+                target: shellApplication,
+                args: [17]);
+            if (computerFolder is null)
+            {
+                return false;
+            }
+
+            var driveToken = normalizedRootPath.TrimEnd(Path.DirectorySeparatorChar, Path.AltDirectorySeparatorChar);
+            driveItem = computerFolder.GetType().InvokeMember(
+                "ParseName",
+                BindingFlags.InvokeMethod,
+                binder: null,
+                target: computerFolder,
+                args: [driveToken]);
+            if (driveItem is null)
+            {
+                return false;
+            }
+
+            if (TryInvokeVerb(driveItem, "Eject"))
+            {
+                return true;
+            }
+
+            return TryInvokeLocalizedEjectVerb(driveItem);
+        }
+        catch (Exception ex)
+        {
+            AppLogger.Warn("RemovableStorage", $"Failed to eject drive '{normalizedRootPath}'.", ex);
+            return false;
+        }
+        finally
+        {
+            ReleaseComObject(driveItem);
+            ReleaseComObject(computerFolder);
+            ReleaseComObject(shellApplication);
+        }
+    }
+
+    private static bool TryInvokeLocalizedEjectVerb(object driveItem)
+    {
+        object? verbs = null;
+
+        try
+        {
+            verbs = driveItem.GetType().InvokeMember(
+                "Verbs",
+                BindingFlags.InvokeMethod,
+                binder: null,
+                target: driveItem,
+                args: null);
+            if (verbs is null)
+            {
+                return false;
+            }
+
+            var verbsType = verbs.GetType();
+            var countObject = verbsType.InvokeMember(
+                "Count",
+                BindingFlags.GetProperty,
+                binder: null,
+                target: verbs,
+                args: null);
+            var count = countObject is null
+                ? 0
+                : Convert.ToInt32(countObject, CultureInfo.InvariantCulture);
+
+            for (var index = 0; index < count; index++)
+            {
+                object? verb = null;
+
+                try
+                {
+                    verb = verbsType.InvokeMember(
+                        "Item",
+                        BindingFlags.InvokeMethod,
+                        binder: null,
+                        target: verbs,
+                        args: [index]);
+                    if (verb is null)
+                    {
+                        continue;
+                    }
+
+                    var verbNameObject = verb.GetType().InvokeMember(
+                        "Name",
+                        BindingFlags.GetProperty,
+                        binder: null,
+                        target: verb,
+                        args: null);
+                    var verbName = Convert.ToString(verbNameObject, CultureInfo.InvariantCulture);
+                    if (!IsEjectVerbName(verbName))
+                    {
+                        continue;
+                    }
+
+                    verb.GetType().InvokeMember(
+                        "DoIt",
+                        BindingFlags.InvokeMethod,
+                        binder: null,
+                        target: verb,
+                        args: null);
+                    return true;
+                }
+                finally
+                {
+                    ReleaseComObject(verb);
+                }
+            }
+
+            return false;
+        }
+        finally
+        {
+            ReleaseComObject(verbs);
+        }
+    }
+
+    private static bool TryInvokeVerb(object driveItem, string verbName)
+    {
+        try
+        {
+            driveItem.GetType().InvokeMember(
+                "InvokeVerb",
+                BindingFlags.InvokeMethod,
+                binder: null,
+                target: driveItem,
+                args: [verbName]);
+            return true;
+        }
+        catch
+        {
+            return false;
+        }
+    }
+
+    private static bool IsEjectVerbName(string? verbName)
+    {
+        if (string.IsNullOrWhiteSpace(verbName))
+        {
+            return false;
+        }
+
+        var normalized = string.Concat(
+            verbName
+                .Where(character => !char.IsWhiteSpace(character) && character != '&'))
+            .Trim();
+
+        return normalized.Contains("Eject", StringComparison.OrdinalIgnoreCase) ||
+               normalized.Contains("弹出", StringComparison.Ordinal) ||
+               normalized.Contains("安全删除", StringComparison.Ordinal) ||
+               normalized.Contains("卸载", StringComparison.Ordinal);
+    }
+
+    private static string NormalizeRootPath(string? rootPath)
+    {
+        if (string.IsNullOrWhiteSpace(rootPath))
+        {
+            return string.Empty;
+        }
+
+        var trimmed = rootPath.Trim();
+        if (trimmed.Length == 1 && char.IsLetter(trimmed[0]))
+        {
+            return string.Create(CultureInfo.InvariantCulture, $"{trimmed}:{Path.DirectorySeparatorChar}");
+        }
+
+        if (trimmed.Length == 2 && char.IsLetter(trimmed[0]) && trimmed[1] == ':')
+        {
+            return trimmed + Path.DirectorySeparatorChar;
+        }
+
+        var normalized = trimmed.Replace(Path.AltDirectorySeparatorChar, Path.DirectorySeparatorChar);
+        var resolvedRoot = Path.GetPathRoot(normalized);
+        return string.IsNullOrWhiteSpace(resolvedRoot)
+            ? normalized
+            : resolvedRoot;
+    }
+
+    private static void ReleaseComObject(object? value)
+    {
+        if (value is not null && Marshal.IsComObject(value))
+        {
+            Marshal.FinalReleaseComObject(value);
+        }
+    }
+}

LanMountainDesktop/Services/Settings/SettingsContracts.cs

@@ -29,6 +29,7 @@ public sealed record StatusBarSettingsState(
     bool EnableDynamicTaskbarActions,
     string TaskbarLayoutMode,
     string ClockDisplayFormat,
+    bool ClockTransparentBackground,
     string SpacingMode,
     int CustomSpacingPercent);
 public sealed record WeatherSettingsState(

LanMountainDesktop/Services/Settings/SettingsDomainServices.cs

@@ -361,6 +361,7 @@ internal sealed class StatusBarSettingsService : IStatusBarSettingsService
             snapshot.EnableDynamicTaskbarActions,
             snapshot.TaskbarLayoutMode,
             snapshot.ClockDisplayFormat,
+            snapshot.StatusBarClockTransparentBackground,
             snapshot.StatusBarSpacingMode,
             snapshot.StatusBarCustomSpacingPercent);
     }
@@ -373,6 +374,7 @@ internal sealed class StatusBarSettingsService : IStatusBarSettingsService
         snapshot.EnableDynamicTaskbarActions = state.EnableDynamicTaskbarActions;
         snapshot.TaskbarLayoutMode = state.TaskbarLayoutMode;
         snapshot.ClockDisplayFormat = state.ClockDisplayFormat;
+        snapshot.StatusBarClockTransparentBackground = state.ClockTransparentBackground;
         snapshot.StatusBarSpacingMode = state.SpacingMode;
         snapshot.StatusBarCustomSpacingPercent = state.CustomSpacingPercent;
         _settingsService.SaveSnapshot(
@@ -385,6 +387,7 @@ internal sealed class StatusBarSettingsService : IStatusBarSettingsService
                 nameof(AppSettingsSnapshot.EnableDynamicTaskbarActions),
                 nameof(AppSettingsSnapshot.TaskbarLayoutMode),
                 nameof(AppSettingsSnapshot.ClockDisplayFormat),
+                nameof(AppSettingsSnapshot.StatusBarClockTransparentBackground),
                 nameof(AppSettingsSnapshot.StatusBarSpacingMode),
                 nameof(AppSettingsSnapshot.StatusBarCustomSpacingPercent)
             ]);

LanMountainDesktop/Services/WhiteboardNotePersistenceService.cs

@@ -0,0 +1,338 @@
+using System;
+using System.Text.Json;
+using LanMountainDesktop.Models;
+using Microsoft.Data.Sqlite;
+
+namespace LanMountainDesktop.Services;
+
+public sealed class WhiteboardNotePersistenceService : IWhiteboardNotePersistenceService
+{
+    private const int DefaultCleanupBatchSize = 256;
+    private static readonly JsonSerializerOptions JsonOptions = new()
+    {
+        PropertyNameCaseInsensitive = true
+    };
+
+    private readonly object _schemaSyncRoot = new();
+    private readonly AppDatabaseService _databaseService;
+    private bool _schemaInitialized;
+
+    public WhiteboardNotePersistenceService(AppDatabaseService? databaseService = null)
+    {
+        _databaseService = databaseService ?? AppDatabaseServiceFactory.CreateDefault();
+    }
+
+    public WhiteboardNoteSnapshot LoadNote(string componentId, string? placementId, int retentionDays)
+    {
+        if (!TryNormalizeKeys(componentId, placementId, out var normalizedComponentId, out var normalizedPlacementId))
+        {
+            return new WhiteboardNoteSnapshot();
+        }
+
+        try
+        {
+            using var connection = OpenConnection();
+            DeleteExpiredInternal(
+                connection,
+                normalizedComponentId,
+                normalizedPlacementId,
+                WhiteboardNoteRetentionPolicy.NormalizeDays(retentionDays),
+                DateTimeOffset.UtcNow);
+
+            using var command = connection.CreateCommand();
+            command.CommandText = """
+                SELECT note_json, saved_at_utc_ms
+                FROM whiteboard_notes
+                WHERE component_id = $componentId
+                  AND placement_id = $placementId
+                LIMIT 1;
+                """;
+            command.Parameters.AddWithValue("$componentId", normalizedComponentId);
+            command.Parameters.AddWithValue("$placementId", normalizedPlacementId);
+
+            using var reader = command.ExecuteReader();
+            if (!reader.Read() || reader.IsDBNull(0))
+            {
+                return new WhiteboardNoteSnapshot();
+            }
+
+            var json = reader.GetString(0);
+            if (string.IsNullOrWhiteSpace(json))
+            {
+                return new WhiteboardNoteSnapshot();
+            }
+
+            var snapshot = JsonSerializer.Deserialize<WhiteboardNoteSnapshot>(json, JsonOptions) ?? new WhiteboardNoteSnapshot();
+            if (!reader.IsDBNull(1))
+            {
+                snapshot.SavedUtc = DateTimeOffset.FromUnixTimeMilliseconds(reader.GetInt64(1));
+            }
+
+            if (IsExpired(snapshot, retentionDays))
+            {
+                DeleteNote(normalizedComponentId, normalizedPlacementId);
+                return new WhiteboardNoteSnapshot();
+            }
+
+            return snapshot.Clone();
+        }
+        catch
+        {
+            return new WhiteboardNoteSnapshot();
+        }
+    }
+
+    public void SaveNote(string componentId, string? placementId, WhiteboardNoteSnapshot snapshot, int retentionDays)
+    {
+        if (!TryNormalizeKeys(componentId, placementId, out var normalizedComponentId, out var normalizedPlacementId))
+        {
+            return;
+        }
+
+        try
+        {
+            var nowUtc = DateTimeOffset.UtcNow;
+            var persistedSnapshot = snapshot?.Clone() ?? new WhiteboardNoteSnapshot();
+            persistedSnapshot.SavedUtc = nowUtc;
+            var expiresUtc = GetExpirationUtc(persistedSnapshot, retentionDays) ?? nowUtc.AddDays(WhiteboardNoteRetentionPolicy.DefaultDays);
+            var json = JsonSerializer.Serialize(persistedSnapshot, JsonOptions);
+
+            using var connection = OpenConnection();
+            using var command = connection.CreateCommand();
+            command.CommandText = """
+                INSERT INTO whiteboard_notes(
+                    component_id,
+                    placement_id,
+                    note_json,
+                    saved_at_utc_ms,
+                    expires_at_utc_ms,
+                    updated_at_utc_ms)
+                VALUES(
+                    $componentId,
+                    $placementId,
+                    $noteJson,
+                    $savedAtUtcMs,
+                    $expiresAtUtcMs,
+                    $updatedAtUtcMs)
+                ON CONFLICT(component_id, placement_id) DO UPDATE SET
+                    note_json = excluded.note_json,
+                    saved_at_utc_ms = excluded.saved_at_utc_ms,
+                    expires_at_utc_ms = excluded.expires_at_utc_ms,
+                    updated_at_utc_ms = excluded.updated_at_utc_ms;
+                """;
+            command.Parameters.AddWithValue("$componentId", normalizedComponentId);
+            command.Parameters.AddWithValue("$placementId", normalizedPlacementId);
+            command.Parameters.AddWithValue("$noteJson", json);
+            command.Parameters.AddWithValue("$savedAtUtcMs", persistedSnapshot.SavedUtc.ToUnixTimeMilliseconds());
+            command.Parameters.AddWithValue("$expiresAtUtcMs", expiresUtc.ToUnixTimeMilliseconds());
+            command.Parameters.AddWithValue("$updatedAtUtcMs", nowUtc.ToUnixTimeMilliseconds());
+            command.ExecuteNonQuery();
+        }
+        catch
+        {
+            // Keep whiteboard usable even when persistence is unavailable.
+        }
+    }
+
+    public bool DeleteNote(string componentId, string? placementId)
+    {
+        if (!TryNormalizeKeys(componentId, placementId, out var normalizedComponentId, out var normalizedPlacementId))
+        {
+            return false;
+        }
+
+        try
+        {
+            using var connection = OpenConnection();
+            using var command = connection.CreateCommand();
+            command.CommandText = """
+                DELETE FROM whiteboard_notes
+                WHERE component_id = $componentId
+                  AND placement_id = $placementId;
+                """;
+            command.Parameters.AddWithValue("$componentId", normalizedComponentId);
+            command.Parameters.AddWithValue("$placementId", normalizedPlacementId);
+            return command.ExecuteNonQuery() > 0;
+        }
+        catch
+        {
+            return false;
+        }
+    }
+
+    public bool TryDeleteExpiredNote(string componentId, string? placementId, int retentionDays)
+    {
+        if (!TryNormalizeKeys(componentId, placementId, out var normalizedComponentId, out var normalizedPlacementId))
+        {
+            return false;
+        }
+
+        try
+        {
+            using var connection = OpenConnection();
+            return DeleteExpiredInternal(
+                connection,
+                normalizedComponentId,
+                normalizedPlacementId,
+                WhiteboardNoteRetentionPolicy.NormalizeDays(retentionDays),
+                DateTimeOffset.UtcNow);
+        }
+        catch
+        {
+            return false;
+        }
+    }
+
+    public int DeleteExpiredNotesBatch(int batchSize = DefaultCleanupBatchSize, DateTimeOffset? now = null)
+    {
+        try
+        {
+            using var connection = OpenConnection();
+            using var command = connection.CreateCommand();
+            command.CommandText = """
+                DELETE FROM whiteboard_notes
+                WHERE rowid IN (
+                    SELECT rowid
+                    FROM whiteboard_notes
+                    WHERE expires_at_utc_ms <= $nowUtcMs
+                    ORDER BY expires_at_utc_ms ASC
+                    LIMIT $batchSize
+                );
+                """;
+            command.Parameters.AddWithValue("$nowUtcMs", (now ?? DateTimeOffset.UtcNow).ToUnixTimeMilliseconds());
+            command.Parameters.AddWithValue("$batchSize", NormalizeBatchSize(batchSize));
+            return command.ExecuteNonQuery();
+        }
+        catch
+        {
+            return 0;
+        }
+    }
+
+    public bool IsExpired(WhiteboardNoteSnapshot snapshot, int retentionDays, DateTimeOffset? now = null)
+    {
+        if (snapshot is null)
+        {
+            return false;
+        }
+
+        var expirationUtc = GetExpirationUtc(snapshot, retentionDays);
+        if (!expirationUtc.HasValue)
+        {
+            return false;
+        }
+
+        return expirationUtc.Value <= (now ?? DateTimeOffset.UtcNow);
+    }
+
+    public DateTimeOffset? GetExpirationUtc(WhiteboardNoteSnapshot snapshot, int retentionDays)
+    {
+        if (snapshot is null || snapshot.SavedUtc == default)
+        {
+            return null;
+        }
+
+        return snapshot.SavedUtc.AddDays(WhiteboardNoteRetentionPolicy.NormalizeDays(retentionDays));
+    }
+
+    private SqliteConnection OpenConnection()
+    {
+        var connection = _databaseService.OpenConnection();
+        EnsureSchema(connection);
+        return connection;
+    }
+
+    private void EnsureSchema(SqliteConnection connection)
+    {
+        if (_schemaInitialized)
+        {
+            return;
+        }
+
+        lock (_schemaSyncRoot)
+        {
+            if (_schemaInitialized)
+            {
+                return;
+            }
+
+            using var command = connection.CreateCommand();
+            command.CommandText = """
+                CREATE TABLE IF NOT EXISTS whiteboard_notes (
+                    component_id TEXT NOT NULL,
+                    placement_id TEXT NOT NULL,
+                    note_json TEXT NOT NULL,
+                    saved_at_utc_ms INTEGER NOT NULL,
+                    expires_at_utc_ms INTEGER NOT NULL,
+                    updated_at_utc_ms INTEGER NOT NULL,
+                    PRIMARY KEY (component_id, placement_id)
+                );
+
+                CREATE INDEX IF NOT EXISTS idx_whiteboard_notes_expires_at
+                    ON whiteboard_notes(expires_at_utc_ms);
+                """;
+            command.ExecuteNonQuery();
+            _schemaInitialized = true;
+        }
+    }
+
+    private static bool DeleteExpiredInternal(
+        SqliteConnection connection,
+        string componentId,
+        string placementId,
+        int retentionDays,
+        DateTimeOffset nowUtc)
+    {
+        using var selectCommand = connection.CreateCommand();
+        selectCommand.CommandText = """
+            SELECT saved_at_utc_ms
+            FROM whiteboard_notes
+            WHERE component_id = $componentId
+              AND placement_id = $placementId
+            LIMIT 1;
+            """;
+        selectCommand.Parameters.AddWithValue("$componentId", componentId);
+        selectCommand.Parameters.AddWithValue("$placementId", placementId);
+
+        var scalar = selectCommand.ExecuteScalar();
+        if (scalar is not long savedAtUtcMs)
+        {
+            return false;
+        }
+
+        var savedUtc = DateTimeOffset.FromUnixTimeMilliseconds(savedAtUtcMs);
+        var expiresUtc = savedUtc.AddDays(WhiteboardNoteRetentionPolicy.NormalizeDays(retentionDays));
+        if (expiresUtc > nowUtc)
+        {
+            return false;
+        }
+
+        using var deleteCommand = connection.CreateCommand();
+        deleteCommand.CommandText = """
+            DELETE FROM whiteboard_notes
+            WHERE component_id = $componentId
+              AND placement_id = $placementId;
+            """;
+        deleteCommand.Parameters.AddWithValue("$componentId", componentId);
+        deleteCommand.Parameters.AddWithValue("$placementId", placementId);
+        return deleteCommand.ExecuteNonQuery() > 0;
+    }
+
+    private static bool TryNormalizeKeys(
+        string componentId,
+        string? placementId,
+        out string normalizedComponentId,
+        out string normalizedPlacementId)
+    {
+        normalizedComponentId = componentId?.Trim() ?? string.Empty;
+        normalizedPlacementId = placementId?.Trim() ?? string.Empty;
+        return !string.IsNullOrWhiteSpace(normalizedComponentId);
+    }
+
+    private static int NormalizeBatchSize(int batchSize)
+    {
+        return batchSize <= 0
+            ? DefaultCleanupBatchSize
+            : Math.Clamp(batchSize, 1, 4096);
+    }
+}

LanMountainDesktop/Styles/ComponentEditorThemeResources.axaml

@@ -1,5 +1,6 @@
 <Styles xmlns="https://github.com/avaloniaui"
-        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml">
+        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
+        xmlns:assists="clr-namespace:Material.Styles.Assists;assembly=Material.Styles">
     <Style Selector="Window.component-editor-window">
         <Setter Property="Background" Value="{DynamicResource EditorWindowBackgroundBrush}" />
     </Style>
@@ -74,7 +75,21 @@
     </Style>
 
     <Style Selector="Window.component-editor-window RadioButton">
+        <Setter Property="Theme" Value="{StaticResource MaterialRadioButton}" />
         <Setter Property="Foreground" Value="{DynamicResource ComponentEditorPrimaryTextBrush}" />
+        <Setter Property="Margin" Value="0,2" />
+        <Setter Property="VerticalContentAlignment" Value="Center" />
+        <Setter Property="assists:SelectionControlAssist.Size" Value="20" />
+        <Setter Property="assists:SelectionControlAssist.Foreground" Value="{DynamicResource ComponentEditorSecondaryTextBrush}" />
+        <Setter Property="assists:SelectionControlAssist.InnerForeground" Value="{DynamicResource EditorPrimaryBrush}" />
+    </Style>
+
+    <Style Selector="Window.component-editor-window RadioButton:pointerover">
+        <Setter Property="assists:SelectionControlAssist.Foreground" Value="{DynamicResource EditorSelectOutlineStrongBrush}" />
+    </Style>
+
+    <Style Selector="Window.component-editor-window RadioButton:checked">
+        <Setter Property="assists:SelectionControlAssist.Foreground" Value="{DynamicResource EditorPrimaryBrush}" />
     </Style>
 
     <Style Selector="Window.component-editor-window ToggleSwitch">

LanMountainDesktop/Styles/GlassModule.axaml

@@ -165,7 +165,13 @@
         <Setter Property="RenderTransform" Value="scale(1.05)" />
     </Style>
 
-    <Style Selector="Border.glass-panel">
+    <!--
+        半透明表面样式类
+        注意：这些样式使用纯色半透明画刷模拟玻璃效果，并非真正的 Mica/Acrylic 模糊材质。
+        真正的 Mica/Acrylic 效果仅通过 WindowTransparencyLevel 在独立窗口上应用。
+    -->
+
+    <Style Selector="Border.surface-translucent-panel">
         <Setter Property="Background" Value="{DynamicResource AdaptiveGlassPanelBackgroundBrush}" />
         <Setter Property="BorderBrush" Value="{DynamicResource AdaptiveGlassPanelBorderBrush}" />
         <Setter Property="BorderThickness" Value="1.2" />
@@ -174,7 +180,7 @@
         <Setter Property="BoxShadow" Value="0 4 12 #1A000000" />
     </Style>
 
-    <Style Selector="Border.glass-strong">
+    <Style Selector="Border.surface-translucent-strong">
         <Setter Property="Background" Value="{DynamicResource AdaptiveGlassStrongBackgroundBrush}" />
         <Setter Property="BorderBrush" Value="{DynamicResource AdaptiveGlassStrongBorderBrush}" />
         <Setter Property="BorderThickness" Value="1.5" />
@@ -183,7 +189,7 @@
         <Setter Property="BoxShadow" Value="0 8 24 #26000000" />
     </Style>
 
-    <Style Selector="Border.glass-island">
+    <Style Selector="Border.surface-translucent-island">
         <Setter Property="Background" Value="{DynamicResource AdaptiveDockGlassBackgroundBrush}" />
         <Setter Property="BorderBrush" Value="{DynamicResource AdaptiveDockGlassBorderBrush}" />
         <Setter Property="BorderThickness" Value="1.5" />
@@ -197,7 +203,7 @@
         </Setter>
     </Style>
 
-    <Style Selector="Border.mica-strong">
+    <Style Selector="Border.surface-solid-strong">
         <Setter Property="Background" Value="{DynamicResource AdaptiveGlassStrongBackgroundBrush}" />
         <Setter Property="BorderThickness" Value="0" />
         <Setter Property="CornerRadius" Value="36" />
@@ -205,11 +211,18 @@
         <Setter Property="BoxShadow" Value="0 8 22 #2A000000" />
     </Style>
 
-    <Style Selector="Border.glass-overlay">
+    <Style Selector="Border.surface-translucent-overlay">
         <Setter Property="Background" Value="{DynamicResource AdaptiveGlassOverlayBackgroundBrush}" />
         <Setter Property="BorderThickness" Value="0" />
         <Setter Property="CornerRadius" Value="0" />
         <Setter Property="Opacity" Value="{DynamicResource AdaptiveGlassOverlayOpacity}" />
     </Style>
 
+    <!-- 向后兼容的旧样式类（已弃用） -->
+    <Style Selector="Border.glass-panel" />
+    <Style Selector="Border.glass-strong" />
+    <Style Selector="Border.glass-island" />
+    <Style Selector="Border.mica-strong" />
+    <Style Selector="Border.glass-overlay" />
+
 </Styles>

LanMountainDesktop/ViewModels/StatusBarSettingsPageViewModel.cs

@@ -39,6 +39,9 @@ public sealed partial class StatusBarSettingsPageViewModel : ViewModelBase
     [ObservableProperty]
     private SelectionOption _selectedClockFormat = new("HourMinuteSecond", "Hour:Minute:Second");
 
+    [ObservableProperty]
+    private bool _clockTransparentBackground;
+
     [ObservableProperty]
     private SelectionOption _selectedSpacingMode = new("Relaxed", "Relaxed");
 
@@ -66,6 +69,12 @@ public sealed partial class StatusBarSettingsPageViewModel : ViewModelBase
     [ObservableProperty]
     private string _clockFormatLabel = string.Empty;
 
+    [ObservableProperty]
+    private string _clockTransparentBackgroundLabel = string.Empty;
+
+    [ObservableProperty]
+    private string _clockTransparentBackgroundDescription = string.Empty;
+
     [ObservableProperty]
     private string _spacingHeader = string.Empty;
 
@@ -88,6 +97,7 @@ public sealed partial class StatusBarSettingsPageViewModel : ViewModelBase
         SelectedClockFormat = ClockFormats.FirstOrDefault(option =>
             string.Equals(option.Value, clockFormat, StringComparison.OrdinalIgnoreCase))
             ?? ClockFormats[1];
+        ClockTransparentBackground = state.ClockTransparentBackground;
 
         var spacingMode = NormalizeSpacingMode(state.SpacingMode);
         SelectedSpacingMode = SpacingModes.FirstOrDefault(option =>
@@ -117,6 +127,16 @@ public sealed partial class StatusBarSettingsPageViewModel : ViewModelBase
         Save();
     }
 
+    partial void OnClockTransparentBackgroundChanged(bool value)
+    {
+        if (_isInitializing)
+        {
+            return;
+        }
+
+        Save();
+    }
+
     partial void OnSelectedSpacingModeChanged(SelectionOption value)
     {
         IsCustomSpacingVisible = string.Equals(value?.Value, "Custom", StringComparison.OrdinalIgnoreCase);
@@ -163,6 +183,7 @@ public sealed partial class StatusBarSettingsPageViewModel : ViewModelBase
             state.EnableDynamicTaskbarActions,
             state.TaskbarLayoutMode,
             SelectedClockFormat.Value,
+            ClockTransparentBackground,
             NormalizeSpacingMode(SelectedSpacingMode.Value),
             Math.Clamp(CustomSpacingPercent, 0, 30)));
     }
@@ -194,6 +215,8 @@ public sealed partial class StatusBarSettingsPageViewModel : ViewModelBase
         ClockHeader = L("settings.status_bar.clock_header", "Clock Component");
         ClockDescription = L("settings.status_bar.clock_description", "Display a clock on the top status bar.");
         ClockFormatLabel = L("settings.status_bar.clock_format_label", "Clock format");
+        ClockTransparentBackgroundLabel = L("settings.status_bar.clock_transparent_background_label", "Transparent background");
+        ClockTransparentBackgroundDescription = L("settings.status_bar.clock_transparent_background_desc", "Remove the capsule background and keep only the clock text.");
         SpacingHeader = L("settings.status_bar.spacing_header", "Component Spacing");
         SpacingDescription = L("settings.status_bar.spacing_desc", "Adjust spacing between status bar components.");
         CustomSpacingLabel = L("settings.status_bar.spacing_custom_label", "Custom spacing (%)");

LanMountainDesktop/Views/ComponentEditorWindow.axaml.cs

@@ -241,6 +241,7 @@ public partial class ComponentEditorWindow : Window
             "DataLine" => MaterialIconKind.ChartLine,
             "Edit" => MaterialIconKind.Pencil,
             "Calculator" => MaterialIconKind.Calculator,
+            "Storage" => MaterialIconKind.UsbFlashDrive,
             "Globe" => MaterialIconKind.Web,
             "Play" => MaterialIconKind.Play,
             _ => MaterialIconKind.Settings

LanMountainDesktop/Views/ComponentEditors/ClassScheduleComponentEditor.axaml

@@ -22,14 +22,17 @@
             <StackPanel Spacing="12">
                 <TextBlock x:Name="ColorSchemeHeaderTextBlock"
                            Classes="component-editor-section-title" />
-                <StackPanel Spacing="8">
+                <ComboBox x:Name="ColorSchemeComboBox"
-                    <RadioButton x:Name="FollowSystemRadioButton"
+                          Classes="component-editor-select"
-                                 GroupName="ColorScheme"
+                          HorizontalAlignment="Stretch"
-                                 IsCheckedChanged="OnColorSchemeChanged" />
+                          SelectionChanged="OnColorSchemeSelectionChanged">
-                    <RadioButton x:Name="UseNativeRadioButton"
+                    <ComboBoxItem x:Name="FollowSystemColorSchemeItem"
-                                 GroupName="ColorScheme"
+                                  Classes="component-editor-select-item"
-                                 IsCheckedChanged="OnColorSchemeChanged" />
+                                  Tag="follow_system" />
-                </StackPanel>
+                    <ComboBoxItem x:Name="UseNativeColorSchemeItem"
+                                  Classes="component-editor-select-item"
+                                  Tag="native" />
+                </ComboBox>
             </StackPanel>
         </Border>
 

LanMountainDesktop/Views/ComponentEditors/ClassScheduleComponentEditor.axaml.cs

@@ -68,40 +68,37 @@ public partial class ClassScheduleComponentEditor : ComponentEditorViewBase
         var colorSchemeSource = snapshot.ColorSchemeSource;
 
         HeadlineTextBlock.Text = Context?.Definition.DisplayName ?? "Class Schedule";
-        DescriptionTextBlock.Text = L("schedule.settings.desc", "导入 ClassIsland 的 CSES 课表文件并选择启用项。");
+        DescriptionTextBlock.Text = L(
+            "schedule.settings.desc",
+            "Import a ClassIsland CSES schedule file and choose which one to use.");
 
-        ColorSchemeHeaderTextBlock.Text = L("component.settings.color_scheme", "配色方案");
+        ColorSchemeHeaderTextBlock.Text = L("component.settings.color_scheme", "Color Scheme");
-        FollowSystemRadioButton.Content = L("component.color_scheme.follow_system", "跟随系统配色");
+        FollowSystemColorSchemeItem.Content = L("component.color_scheme.follow_system", "Follow system color scheme");
-        UseNativeRadioButton.Content = L("component.color_scheme.native", "使用组件自定义配色");
+        UseNativeColorSchemeItem.Content = L("component.color_scheme.native", "Use component custom color scheme");
 
-        AddScheduleButton.Content = L("schedule.settings.add", "添加课表");
+        AddScheduleButton.Content = L("schedule.settings.add", "Add Schedule");
-        EmptyStateTextBlock.Text = L("schedule.settings.empty", "暂无导入课表");
+        EmptyStateTextBlock.Text = L("schedule.settings.empty", "No imported schedules yet.");
 
         _suppressEvents = true;
-        
+        ColorSchemeComboBox.SelectedItem =
-        if (string.IsNullOrEmpty(colorSchemeSource) || 
+            string.IsNullOrEmpty(colorSchemeSource) ||
-            colorSchemeSource == ThemeAppearanceValues.ColorSchemeFollowSystem)
+            string.Equals(colorSchemeSource, ThemeAppearanceValues.ColorSchemeFollowSystem, StringComparison.OrdinalIgnoreCase)
-        {
+                ? FollowSystemColorSchemeItem
-            FollowSystemRadioButton.IsChecked = true;
+                : UseNativeColorSchemeItem;
-        }
-        else
-        {
-            UseNativeRadioButton.IsChecked = true;
-        }
-        
         _suppressEvents = false;
     }
 
-    private void OnColorSchemeChanged(object? sender, RoutedEventArgs e)
+    private void OnColorSchemeSelectionChanged(object? sender, SelectionChangedEventArgs e)
     {
+        _ = sender;
+        _ = e;
         if (_suppressEvents)
         {
             return;
         }
 
-        var useNative = UseNativeRadioButton.IsChecked == true;
+        var colorSchemeSource = ColorSchemeComboBox.SelectedItem is ComboBoxItem item && item.Tag is string tag
-        var colorSchemeSource = useNative 
+            ? tag
-            ? ThemeAppearanceValues.ColorSchemeNative 
             : ThemeAppearanceValues.ColorSchemeFollowSystem;
 
         var snapshot = LoadSnapshot();
@@ -121,11 +118,11 @@ public partial class ClassScheduleComponentEditor : ComponentEditorViewBase
 
         var files = await storageProvider.OpenFilePickerAsync(new FilePickerOpenOptions
         {
-            Title = L("schedule.settings.picker_title", "选择 ClassIsland 课表文件"),
+            Title = L("schedule.settings.picker_title", "Choose ClassIsland schedule file"),
             AllowMultiple = false,
             FileTypeFilter =
             [
-                new FilePickerFileType(L("schedule.settings.picker_file_type", "ClassIsland CSES 课表"))
+                new FilePickerFileType(L("schedule.settings.picker_file_type", "ClassIsland CSES Schedule"))
                 {
                     Patterns = ["*.cses", "*.yaml", "*.yml"]
                 }
@@ -155,7 +152,7 @@ public partial class ClassScheduleComponentEditor : ComponentEditorViewBase
             {
                 Id = Guid.NewGuid().ToString("N"),
                 DisplayName = Path.GetFileNameWithoutExtension(importedPath)?.Trim()
-                    ?? L("schedule.settings.unnamed", "未命名课表"),
+                    ?? L("schedule.settings.unnamed", "Untitled Schedule"),
                 FilePath = importedPath
             });
             _activeScheduleId = _importedSchedules[^1].Id;
@@ -219,7 +216,7 @@ public partial class ClassScheduleComponentEditor : ComponentEditorViewBase
             var title = new TextBlock
             {
                 Text = string.IsNullOrWhiteSpace(item.DisplayName)
-                    ? L("schedule.settings.unnamed", "未命名课表")
+                    ? L("schedule.settings.unnamed", "Untitled Schedule")
                     : item.DisplayName,
                 FontWeight = FontWeight.SemiBold
             };
@@ -234,7 +231,7 @@ public partial class ClassScheduleComponentEditor : ComponentEditorViewBase
 
             var deleteButton = new Button
             {
-                Content = L("schedule.settings.delete", "删除"),
+                Content = L("schedule.settings.delete", "Delete"),
                 Tag = item.Id,
                 Padding = new Thickness(12, 8),
                 HorizontalAlignment = HorizontalAlignment.Right

LanMountainDesktop/Views/ComponentEditors/OfficeRecentDocumentsComponentEditor.axaml

@@ -0,0 +1,42 @@
+<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"
+             mc:Ignorable="d"
+             x:Class="LanMountainDesktop.Views.ComponentEditors.OfficeRecentDocumentsComponentEditor">
+    <StackPanel Spacing="16">
+        <Border Classes="component-editor-hero-card"
+                Padding="24">
+            <StackPanel Spacing="8">
+                <TextBlock x:Name="HeadlineTextBlock"
+                           Classes="component-editor-headline"
+                           TextWrapping="Wrap" />
+                <TextBlock x:Name="DescriptionTextBlock"
+                           Classes="component-editor-secondary-text"
+                           TextWrapping="Wrap" />
+            </StackPanel>
+        </Border>
+
+        <Border Classes="component-editor-card"
+                Padding="20">
+            <StackPanel Spacing="12">
+                <TextBlock x:Name="SourcesHeaderTextBlock"
+                           Classes="component-editor-section-title" />
+                <TextBlock x:Name="SourcesDescriptionTextBlock"
+                           Classes="component-editor-secondary-text"
+                           TextWrapping="Wrap" />
+                <CheckBox x:Name="RegistryCheckBox"
+                          IsCheckedChanged="OnSourceSelectionChanged" />
+                <CheckBox x:Name="RecentFoldersCheckBox"
+                          IsCheckedChanged="OnSourceSelectionChanged" />
+                <CheckBox x:Name="JumpListsCheckBox"
+                          IsCheckedChanged="OnSourceSelectionChanged" />
+            </StackPanel>
+        </Border>
+
+        <TextBlock x:Name="HintTextBlock"
+                   Classes="component-editor-secondary-text"
+                   Margin="12,0"
+                   TextWrapping="Wrap" />
+    </StackPanel>
+</UserControl>

LanMountainDesktop/Views/ComponentEditors/OfficeRecentDocumentsComponentEditor.axaml.cs

@@ -0,0 +1,87 @@
+using System;
+using System.Linq;
+using Avalonia.Interactivity;
+using LanMountainDesktop.ComponentSystem;
+using LanMountainDesktop.Models;
+
+namespace LanMountainDesktop.Views.ComponentEditors;
+
+public partial class OfficeRecentDocumentsComponentEditor : ComponentEditorViewBase
+{
+    private bool _suppressEvents;
+
+    public OfficeRecentDocumentsComponentEditor()
+        : this(null)
+    {
+    }
+
+    public OfficeRecentDocumentsComponentEditor(DesktopComponentEditorContext? context)
+        : base(context)
+    {
+        InitializeComponent();
+        ApplyState();
+    }
+
+    private void ApplyState()
+    {
+        var snapshot = LoadSnapshot();
+        var enabledSources = OfficeRecentDocumentSourceTypes.NormalizeValues(
+            snapshot.OfficeRecentDocumentsEnabledSources,
+            useDefaultWhenEmpty: snapshot.OfficeRecentDocumentsEnabledSources is null);
+
+        HeadlineTextBlock.Text = Context?.Definition.DisplayName ?? L(
+            "component.office_recent_documents",
+            "Recent Documents");
+        DescriptionTextBlock.Text = L(
+            "office_recent_documents.settings.desc",
+            "Choose which Windows and Office sources this widget should scan for recent documents.");
+        SourcesHeaderTextBlock.Text = L(
+            "office_recent_documents.settings.sources_title",
+            "Recent document sources");
+        SourcesDescriptionTextBlock.Text = L(
+            "office_recent_documents.settings.sources_desc",
+            "You can combine multiple sources. Registry selection also keeps the Office interop MRU fallback available.");
+        RegistryCheckBox.Content = L(
+            "office_recent_documents.settings.source.registry",
+            "Office registry MRU");
+        RecentFoldersCheckBox.Content = L(
+            "office_recent_documents.settings.source.recent_folders",
+            "Windows Recent folders");
+        JumpListsCheckBox.Content = L(
+            "office_recent_documents.settings.source.jump_lists",
+            "Windows Jump Lists");
+        HintTextBlock.Text = L(
+            "office_recent_documents.settings.hint",
+            "If you disable all sources, this widget will stay empty until at least one source is enabled again.");
+
+        _suppressEvents = true;
+        RegistryCheckBox.IsChecked = enabledSources.Contains(OfficeRecentDocumentSourceTypes.Registry, StringComparer.OrdinalIgnoreCase);
+        RecentFoldersCheckBox.IsChecked = enabledSources.Contains(OfficeRecentDocumentSourceTypes.RecentFolders, StringComparer.OrdinalIgnoreCase);
+        JumpListsCheckBox.IsChecked = enabledSources.Contains(OfficeRecentDocumentSourceTypes.JumpLists, StringComparer.OrdinalIgnoreCase);
+        _suppressEvents = false;
+    }
+
+    private void OnSourceSelectionChanged(object? sender, RoutedEventArgs e)
+    {
+        _ = sender;
+        _ = e;
+        if (_suppressEvents)
+        {
+            return;
+        }
+
+        var selectedSources = new[]
+        {
+            RegistryCheckBox.IsChecked == true ? OfficeRecentDocumentSourceTypes.Registry : null,
+            RecentFoldersCheckBox.IsChecked == true ? OfficeRecentDocumentSourceTypes.RecentFolders : null,
+            JumpListsCheckBox.IsChecked == true ? OfficeRecentDocumentSourceTypes.JumpLists : null
+        }
+        .Where(static value => !string.IsNullOrWhiteSpace(value))
+        .Cast<string>()
+        .ToList();
+
+        var snapshot = LoadSnapshot();
+        snapshot.OfficeRecentDocumentsEnabledSources = selectedSources;
+        SaveSnapshot(snapshot, nameof(ComponentSettingsSnapshot.OfficeRecentDocumentsEnabledSources));
+    }
+}

LanMountainDesktop/Views/ComponentEditors/RemovableStorageComponentEditor.axaml

@@ -0,0 +1,50 @@
+<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"
+             mc:Ignorable="d"
+             x:Class="LanMountainDesktop.Views.ComponentEditors.RemovableStorageComponentEditor">
+    <StackPanel Spacing="16">
+        <Border Classes="component-editor-hero-card"
+                Padding="24">
+            <StackPanel Spacing="8">
+                <TextBlock x:Name="HeadlineTextBlock"
+                           Classes="component-editor-headline"
+                           TextWrapping="Wrap" />
+                <TextBlock x:Name="DescriptionTextBlock"
+                           Classes="component-editor-secondary-text"
+                           TextWrapping="Wrap" />
+            </StackPanel>
+        </Border>
+
+        <Border Classes="component-editor-card"
+                Padding="20">
+            <StackPanel Spacing="12">
+                <TextBlock x:Name="ColorSchemeHeaderTextBlock"
+                           Classes="component-editor-section-title" />
+                <ComboBox x:Name="ColorSchemeComboBox"
+                          Classes="component-editor-select"
+                          HorizontalAlignment="Stretch"
+                          SelectionChanged="OnColorSchemeSelectionChanged">
+                    <ComboBoxItem x:Name="FollowSystemColorSchemeItem"
+                                  Classes="component-editor-select-item"
+                                  Tag="follow_system" />
+                    <ComboBoxItem x:Name="UseNativeColorSchemeItem"
+                                  Classes="component-editor-select-item"
+                                  Tag="native" />
+                </ComboBox>
+            </StackPanel>
+        </Border>
+
+        <Border Classes="component-editor-card"
+                Padding="20">
+            <StackPanel Spacing="10">
+                <TextBlock x:Name="BehaviorHeaderTextBlock"
+                           Classes="component-editor-section-title" />
+                <TextBlock x:Name="BehaviorTextBlock"
+                           Classes="component-editor-secondary-text"
+                           TextWrapping="Wrap" />
+            </StackPanel>
+        </Border>
+    </StackPanel>
+</UserControl>

LanMountainDesktop/Views/ComponentEditors/RemovableStorageComponentEditor.axaml.cs

@@ -0,0 +1,67 @@
+using System;
+using Avalonia.Controls;
+using Avalonia.Interactivity;
+using LanMountainDesktop.ComponentSystem;
+using LanMountainDesktop.Models;
+using LanMountainDesktop.Services;
+
+namespace LanMountainDesktop.Views.ComponentEditors;
+
+public partial class RemovableStorageComponentEditor : ComponentEditorViewBase
+{
+    private bool _suppressEvents;
+
+    public RemovableStorageComponentEditor()
+        : this(null)
+    {
+    }
+
+    public RemovableStorageComponentEditor(DesktopComponentEditorContext? context)
+        : base(context)
+    {
+        InitializeComponent();
+        ApplyState();
+    }
+
+    private void ApplyState()
+    {
+        var snapshot = LoadSnapshot();
+        var colorSchemeSource = snapshot.ColorSchemeSource;
+
+        HeadlineTextBlock.Text = Context?.Definition.DisplayName ?? "Removable Storage";
+        DescriptionTextBlock.Text = L(
+            "removable_storage.settings.desc",
+            "Show a connected USB drive with quick open and eject actions.");
+        ColorSchemeHeaderTextBlock.Text = L("component.settings.color_scheme", "Color Scheme");
+        FollowSystemColorSchemeItem.Content = L("component.color_scheme.follow_system", "Follow system color scheme");
+        UseNativeColorSchemeItem.Content = L("component.color_scheme.native", "Use component custom color scheme");
+        BehaviorHeaderTextBlock.Text = L("removable_storage.settings.behavior_title", "Behavior");
+        BehaviorTextBlock.Text = L(
+            "removable_storage.settings.behavior_desc",
+            "The widget automatically watches for removable drives and switches to the newest inserted USB drive.");
+
+        _suppressEvents = true;
+        ColorSchemeComboBox.SelectedItem =
+            string.IsNullOrWhiteSpace(colorSchemeSource) ||
+            string.Equals(colorSchemeSource, ThemeAppearanceValues.ColorSchemeFollowSystem, StringComparison.OrdinalIgnoreCase)
+                ? FollowSystemColorSchemeItem
+                : UseNativeColorSchemeItem;
+        _suppressEvents = false;
+    }
+
+    private void OnColorSchemeSelectionChanged(object? sender, SelectionChangedEventArgs e)
+    {
+        _ = sender;
+        _ = e;
+        if (_suppressEvents)
+        {
+            return;
+        }
+
+        var snapshot = LoadSnapshot();
+        snapshot.ColorSchemeSource = ColorSchemeComboBox.SelectedItem is ComboBoxItem item && item.Tag is string tag
+            ? tag
+            : ThemeAppearanceValues.ColorSchemeFollowSystem;
+        SaveSnapshot(snapshot, nameof(ComponentSettingsSnapshot.ColorSchemeSource));
+    }
+}

LanMountainDesktop/Views/ComponentEditors/StudyEnvironmentComponentEditor.axaml

@@ -6,7 +6,7 @@
              mc:Ignorable="d"
              x:Class="LanMountainDesktop.Views.ComponentEditors.StudyEnvironmentComponentEditor">
     <StackPanel Spacing="16">
-        <Border Classes="component-editor-hero_card"
+        <Border Classes="component-editor-hero-card"
                 Padding="24">
             <StackPanel Spacing="8">
                 <TextBlock x:Name="HeadlineTextBlock"
@@ -23,14 +23,17 @@
             <StackPanel Spacing="12">
                 <TextBlock x:Name="ColorSchemeHeaderTextBlock"
                            Classes="component-editor-section-title" />
-                <StackPanel Spacing="8">
+                <ComboBox x:Name="ColorSchemeComboBox"
-                    <RadioButton x:Name="FollowSystemRadioButton"
+                          Classes="component-editor-select"
-                                 GroupName="ColorScheme"
+                          HorizontalAlignment="Stretch"
-                                 IsCheckedChanged="OnColorSchemeChanged" />
+                          SelectionChanged="OnColorSchemeSelectionChanged">
-                    <RadioButton x:Name="UseNativeRadioButton"
+                    <ComboBoxItem x:Name="FollowSystemColorSchemeItem"
-                                 GroupName="ColorScheme"
+                                  Classes="component-editor-select-item"
-                                 IsCheckedChanged="OnColorSchemeChanged" />
+                                  Tag="follow_system" />
-                </StackPanel>
+                    <ComboBoxItem x:Name="UseNativeColorSchemeItem"
+                                  Classes="component-editor-select-item"
+                                  Tag="native" />
+                </ComboBox>
             </StackPanel>
         </Border>
 
@@ -44,7 +47,7 @@
             </StackPanel>
         </Border>
 
-        <Border Classes="component-editor_card"
+        <Border Classes="component-editor-card"
                 Padding="20">
             <StackPanel Spacing="12">
                 <TextBlock x:Name="DbfsHeaderTextBlock"

LanMountainDesktop/Views/ComponentEditors/StudyEnvironmentComponentEditor.axaml.cs

@@ -1,3 +1,5 @@
+using System;
+using Avalonia.Controls;
 using Avalonia.Interactivity;
 using LanMountainDesktop.ComponentSystem;
 using LanMountainDesktop.Models;
@@ -34,43 +36,40 @@ public partial class StudyEnvironmentComponentEditor : ComponentEditorViewBase
         }
 
         HeadlineTextBlock.Text = Context?.Definition.DisplayName ?? "Study Environment";
-        DescriptionTextBlock.Text = L("study.environment.settings.desc", "配置右侧实时噪音值显示内容。");
+        DescriptionTextBlock.Text = L(
+            "study.environment.settings.desc",
+            "Configure the realtime audio level information shown on the right side.");
 
-        ColorSchemeHeaderTextBlock.Text = L("component.settings.color_scheme", "配色方案");
+        ColorSchemeHeaderTextBlock.Text = L("component.settings.color_scheme", "Color Scheme");
-        FollowSystemRadioButton.Content = L("component.color_scheme.follow_system", "跟随系统配色");
+        FollowSystemColorSchemeItem.Content = L("component.color_scheme.follow_system", "Follow system color scheme");
-        UseNativeRadioButton.Content = L("component.color_scheme.native", "使用组件自定义配色");
+        UseNativeColorSchemeItem.Content = L("component.color_scheme.native", "Use component custom color scheme");
 
-        DisplayDbToggleSwitch.Content = L("study.environment.settings.show_display_db", "显示 display dB");
+        DisplayDbToggleSwitch.Content = L("study.environment.settings.show_display_db", "Show display dB");
-        DbfsToggleSwitch.Content = L("study.environment.settings.show_dbfs", "显示 dBFS");
+        DbfsToggleSwitch.Content = L("study.environment.settings.show_dbfs", "Show dBFS");
-        HintTextBlock.Text = L("study.environment.settings.hint", "至少启用一种显示方式。");
+        HintTextBlock.Text = L("study.environment.settings.hint", "At least one display mode must stay enabled.");
 
         _suppressEvents = true;
-        
+        ColorSchemeComboBox.SelectedItem =
-        if (string.IsNullOrEmpty(colorSchemeSource) || 
+            string.IsNullOrEmpty(colorSchemeSource) ||
-            colorSchemeSource == ThemeAppearanceValues.ColorSchemeFollowSystem)
+            string.Equals(colorSchemeSource, ThemeAppearanceValues.ColorSchemeFollowSystem, StringComparison.OrdinalIgnoreCase)
-        {
+                ? FollowSystemColorSchemeItem
-            FollowSystemRadioButton.IsChecked = true;
+                : UseNativeColorSchemeItem;
-        }
-        else
-        {
-            UseNativeRadioButton.IsChecked = true;
-        }
-        
         DisplayDbToggleSwitch.IsChecked = showDisplayDb;
         DbfsToggleSwitch.IsChecked = showDbfs;
         _suppressEvents = false;
     }
 
-    private void OnColorSchemeChanged(object? sender, RoutedEventArgs e)
+    private void OnColorSchemeSelectionChanged(object? sender, SelectionChangedEventArgs e)
     {
+        _ = sender;
+        _ = e;
         if (_suppressEvents)
         {
             return;
         }
 
-        var useNative = UseNativeRadioButton.IsChecked == true;
+        var colorSchemeSource = ColorSchemeComboBox.SelectedItem is ComboBoxItem item && item.Tag is string tag
-        var colorSchemeSource = useNative 
+            ? tag
-            ? ThemeAppearanceValues.ColorSchemeNative 
             : ThemeAppearanceValues.ColorSchemeFollowSystem;
 
         var snapshot = LoadSnapshot();

LanMountainDesktop/Views/ComponentEditors/WhiteboardComponentEditor.axaml

@@ -0,0 +1,40 @@
+<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"
+             mc:Ignorable="d"
+             x:Class="LanMountainDesktop.Views.ComponentEditors.WhiteboardComponentEditor">
+    <StackPanel Spacing="16">
+        <Border Classes="component-editor-hero-card"
+                Padding="24">
+            <StackPanel Spacing="8">
+                <TextBlock x:Name="HeadlineTextBlock"
+                           Classes="component-editor-headline"
+                           TextWrapping="Wrap" />
+                <TextBlock x:Name="DescriptionTextBlock"
+                           Classes="component-editor-secondary-text"
+                           TextWrapping="Wrap" />
+            </StackPanel>
+        </Border>
+
+        <Border Classes="component-editor-card"
+                Padding="20">
+            <StackPanel Spacing="12">
+                <TextBlock x:Name="RetentionHeaderTextBlock"
+                           Classes="component-editor-section-title" />
+                <TextBlock x:Name="RetentionDescriptionTextBlock"
+                           Classes="component-editor-secondary-text"
+                           TextWrapping="Wrap" />
+                <ComboBox x:Name="RetentionComboBox"
+                          Classes="component-editor-select"
+                          HorizontalAlignment="Stretch"
+                          SelectionChanged="OnRetentionSelectionChanged" />
+            </StackPanel>
+        </Border>
+
+        <TextBlock x:Name="InstanceHintTextBlock"
+                   Classes="component-editor-secondary-text"
+                   Margin="12,0"
+                   TextWrapping="Wrap" />
+    </StackPanel>
+</UserControl>

LanMountainDesktop/Views/ComponentEditors/WhiteboardComponentEditor.axaml.cs

@@ -0,0 +1,106 @@
+using System;
+using System.Linq;
+using Avalonia.Controls;
+using Avalonia.Interactivity;
+using LanMountainDesktop.ComponentSystem;
+using LanMountainDesktop.Models;
+
+namespace LanMountainDesktop.Views.ComponentEditors;
+
+public partial class WhiteboardComponentEditor : ComponentEditorViewBase
+{
+    private bool _suppressEvents;
+
+    public WhiteboardComponentEditor()
+        : this(null)
+    {
+    }
+
+    public WhiteboardComponentEditor(DesktopComponentEditorContext? context)
+        : base(context)
+    {
+        InitializeComponent();
+        BuildRetentionOptions();
+        ApplyState();
+    }
+
+    private void BuildRetentionOptions()
+    {
+        RetentionComboBox.Items.Clear();
+        for (var days = WhiteboardNoteRetentionPolicy.MinimumDays; days <= WhiteboardNoteRetentionPolicy.MaximumDays; days++)
+        {
+            var item = new ComboBoxItem
+            {
+                Tag = days.ToString(),
+                Content = L(
+                    "whiteboard.settings.retention.option",
+                    "{0} days").Replace("{0}", days.ToString())
+            };
+            item.Classes.Add("component-editor-select-item");
+            RetentionComboBox.Items.Add(item);
+        }
+    }
+
+    private void ApplyState()
+    {
+        var snapshot = LoadSnapshot();
+        var retentionDays = NormalizeRetentionDays(snapshot.WhiteboardNoteRetentionDays);
+
+        HeadlineTextBlock.Text = Context?.Definition.DisplayName ?? "Blackboard";
+        DescriptionTextBlock.Text = L(
+            "whiteboard.settings.desc",
+            "Each blackboard keeps its own note history and saves it independently.");
+        RetentionHeaderTextBlock.Text = L(
+            "whiteboard.settings.retention.title",
+            "Note retention");
+        RetentionDescriptionTextBlock.Text = L(
+            "whiteboard.settings.retention.desc",
+            "Choose how long this blackboard should keep saved notes before expired data is removed automatically.");
+        InstanceHintTextBlock.Text = L(
+            "whiteboard.settings.instance_scope",
+            "This retention setting is stored per blackboard component instance.");
+
+        _suppressEvents = true;
+        RetentionComboBox.SelectedItem = RetentionComboBox.Items
+            .OfType<ComboBoxItem>()
+            .FirstOrDefault(item =>
+                item.Tag is string tag &&
+                int.TryParse(tag, out var days) &&
+                days == retentionDays);
+        _suppressEvents = false;
+    }
+
+    private void OnRetentionSelectionChanged(object? sender, SelectionChangedEventArgs e)
+    {
+        _ = sender;
+        _ = e;
+        if (_suppressEvents)
+        {
+            return;
+        }
+
+        var snapshot = LoadSnapshot();
+        snapshot.WhiteboardNoteRetentionDays = GetSelectedRetentionDays();
+        SaveSnapshot(snapshot, nameof(ComponentSettingsSnapshot.WhiteboardNoteRetentionDays));
+    }
+
+    private int GetSelectedRetentionDays()
+    {
+        if (RetentionComboBox.SelectedItem is ComboBoxItem item &&
+            item.Tag is string tag &&
+            int.TryParse(tag, out var days))
+        {
+            return NormalizeRetentionDays(days);
+        }
+
+        return WhiteboardNoteRetentionPolicy.DefaultDays;
+    }
+
+    private static int NormalizeRetentionDays(int days)
+    {
+        return WhiteboardNoteRetentionPolicy.NormalizeDays(
+            days <= 0
+                ? WhiteboardNoteRetentionPolicy.DefaultDays
+                : days);
+    }
+}

LanMountainDesktop/Views/ComponentLibraryWindow.axaml

@@ -38,7 +38,7 @@
         <Grid Grid.Row="1"
               ColumnDefinitions="240,*"
               ColumnSpacing="12">
-            <Border Classes="glass-panel"
+            <Border Classes="surface-translucent-panel"
                     CornerRadius="24"
                     Padding="10">
                 <ListBox x:Name="CategoryListBox"
@@ -70,7 +70,7 @@
             </Border>
 
             <Border Grid.Column="1"
-                    Classes="glass-strong"
+                    Classes="surface-translucent-strong"
                     CornerRadius="24"
                     Padding="10">
                 <ScrollViewer VerticalScrollBarVisibility="Auto"

LanMountainDesktop/Views/Components/ClockWidget.axaml

@@ -1,4 +1,4 @@
-<UserControl xmlns="https://github.com/avaloniaui"
+<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"
@@ -8,7 +8,7 @@
              x:Class="LanMountainDesktop.Views.Components.ClockWidget">
 
     <Border x:Name="RootBorder"
-            Classes="glass-panel"
+            Classes="surface-translucent-panel"
             Padding="0"
             CornerRadius="24">
         <StackPanel Orientation="Horizontal"

LanMountainDesktop/Views/Components/ClockWidget.axaml.cs

@@ -23,6 +23,8 @@ public partial class ClockWidget : UserControl, IDesktopComponentWidget, ITimeZo
 
     private TimeZoneService? _timeZoneService;
     private ClockDisplayFormat _displayFormat = ClockDisplayFormat.HourMinuteSecond;
+    private bool _transparentBackground;
+    private double _lastAppliedCellSize = 100;
 
     public ClockWidget()
     {
@@ -44,11 +46,32 @@ public partial class ClockWidget : UserControl, IDesktopComponentWidget, ITimeZo
         }
     }
 
+    public bool TransparentBackground
+    {
+        get => _transparentBackground;
+        set
+        {
+            if (_transparentBackground == value)
+            {
+                return;
+            }
+
+            _transparentBackground = value;
+            ApplyChrome();
+            ApplyCellSize(_lastAppliedCellSize);
+        }
+    }
+
     public void SetDisplayFormat(ClockDisplayFormat format)
     {
         DisplayFormat = format;
     }
 
+    public void SetTransparentBackground(bool transparentBackground)
+    {
+        TransparentBackground = transparentBackground;
+    }
+
     public void SetTimeZoneService(TimeZoneService timeZoneService)
     {
         ClearTimeZoneService();
@@ -101,6 +124,8 @@ public partial class ClockWidget : UserControl, IDesktopComponentWidget, ITimeZo
 
     public void ApplyCellSize(double cellSize)
     {
+        _lastAppliedCellSize = cellSize;
+
         // --- Class Island “满盈”风格算法 ---
         
         // 1. 计算组件高度：保持与任务栏核心比例一致 (0.74x)
@@ -130,7 +155,38 @@ public partial class ClockWidget : UserControl, IDesktopComponentWidget, ITimeZo
             panel.Spacing = Math.Clamp(cellSize * 0.06, 2, 8);
         }
 
+        if (_transparentBackground)
+        {
+            RootBorder.MinWidth = 0;
+            RootBorder.Padding = new Thickness(Math.Clamp(cellSize * 0.06, 4, 10), 0);
+            return;
+        }
+
         // 确保清除可能存在的固定 Padding，由代码控制“紧密感”
+        RootBorder.MinWidth = cellSize * 2.2;
         RootBorder.Padding = new Thickness(Math.Clamp(cellSize * 0.15, 12, 24), 0);
     }
+
+    private void ApplyChrome()
+    {
+        if (_transparentBackground)
+        {
+            RootBorder.Classes.Remove("glass-panel");
+            RootBorder.Background = Brushes.Transparent;
+            RootBorder.BorderBrush = Brushes.Transparent;
+            RootBorder.BorderThickness = new Thickness(0);
+            RootBorder.BoxShadow = default;
+            return;
+        }
+
+        if (!RootBorder.Classes.Contains("glass-panel"))
+        {
+            RootBorder.Classes.Add("glass-panel");
+        }
+
+        RootBorder.ClearValue(Border.BackgroundProperty);
+        RootBorder.ClearValue(Border.BorderBrushProperty);
+        RootBorder.ClearValue(Border.BorderThicknessProperty);
+        RootBorder.ClearValue(Border.BoxShadowProperty);
+    }
 }

LanMountainDesktop/Views/Components/DesktopComponentRuntimeRegistry.cs

@@ -444,6 +444,11 @@ public sealed class DesktopComponentRuntimeRegistry
                     "component.office_recent_documents",
                     () => new OfficeRecentDocumentsWidget(),
                     cellSize => Math.Clamp(cellSize * 0.50, 10, 24)),
+                new DesktopComponentRuntimeRegistration(
+                    BuiltInComponentIds.DesktopRemovableStorage,
+                    "component.removable_storage",
+                    () => new RemovableStorageWidget(),
+                    cellSize => Math.Clamp(cellSize * 0.46, 12, 26)),
                 new DesktopComponentRuntimeRegistration(
                     BuiltInComponentIds.HolidayCalendar,
                     "component.holiday_calendar",

LanMountainDesktop/Views/Components/OfficeRecentDocumentsWidget.axaml.cs

@@ -1,17 +1,23 @@
 using System;
 using System.Collections.Generic;
 using System.Linq;
+using System.Threading.Tasks;
 using Avalonia.Controls;
 using Avalonia.Input;
+using LanMountainDesktop.ComponentSystem;
+using LanMountainDesktop.Models;
 using LanMountainDesktop.Services;
-using LanMountainDesktop.Views.Components;
 
 namespace LanMountainDesktop.Views.Components;
 
-public partial class OfficeRecentDocumentsWidget : UserControl, IDesktopComponentWidget, IDesktopPageVisibilityAwareComponentWidget
+public partial class OfficeRecentDocumentsWidget : UserControl, IDesktopComponentWidget, IDesktopPageVisibilityAwareComponentWidget, IComponentPlacementContextAware
 {
     private readonly IOfficeRecentDocumentsService _recentDocumentsService;
+    private readonly IComponentInstanceSettingsStore _componentSettingsStore = HostComponentSettingsStoreProvider.GetOrCreate();
     private List<OfficeRecentDocument> _documents = new();
+    private string _componentId = BuiltInComponentIds.DesktopOfficeRecentDocuments;
+    private string _placementId = string.Empty;
+    private IReadOnlyList<string> _enabledSources = OfficeRecentDocumentSourceTypes.DefaultValues;
     private bool _isOnActivePage;
     private bool _isEditMode;
     private bool _isLoading;
@@ -20,6 +26,7 @@ public partial class OfficeRecentDocumentsWidget : UserControl, IDesktopComponen
     {
         InitializeComponent();
         _recentDocumentsService = new OfficeRecentDocumentsService();
+        ReloadSettings();
     }
 
     public void ApplyCellSize(double cellSize)
@@ -44,27 +51,45 @@ public partial class OfficeRecentDocumentsWidget : UserControl, IDesktopComponen
         }
     }
 
-    private void LoadDocuments()
+    public void SetComponentPlacementContext(string componentId, string? placementId)
     {
+        _componentId = string.IsNullOrWhiteSpace(componentId)
+            ? BuiltInComponentIds.DesktopOfficeRecentDocuments
+            : componentId.Trim();
+        _placementId = placementId?.Trim() ?? string.Empty;
+        ReloadSettings();
+    }
+
+    private async void LoadDocuments()
+    {
+        if (_isLoading)
+        {
+            return;
+        }
+
         try
         {
             _isLoading = true;
+            ReloadSettings();
             StatusTextBlock.IsVisible = false;
+            DocumentsItemsControl.ItemsSource = null;
 
-            _documents = _recentDocumentsService.GetRecentDocuments(20);
+            var enabledSources = _enabledSources.ToArray();
+            _documents = await Task.Run(() => _recentDocumentsService.GetRecentDocuments(20, enabledSources));
 
             if (_documents.Count == 0)
             {
-                StatusTextBlock.Text = "暂无最近文档";
+                StatusTextBlock.Text = "\u6682\u65e0\u6700\u8fd1\u6587\u6863";
                 StatusTextBlock.IsVisible = true;
                 return;
             }
 
             UpdateDisplay();
         }
-        catch
+        catch (Exception ex)
         {
-            StatusTextBlock.Text = "加载失败";
+            AppLogger.Warn("OfficeRecentDocsWidget", "Failed to load recent Office documents.", ex);
+            StatusTextBlock.Text = "\u52a0\u8f7d\u5931\u8d25";
             StatusTextBlock.IsVisible = true;
         }
         finally
@@ -73,6 +98,14 @@ public partial class OfficeRecentDocumentsWidget : UserControl, IDesktopComponen
         }
     }
 
+    private void ReloadSettings()
+    {
+        var snapshot = _componentSettingsStore.LoadForComponent(_componentId, _placementId);
+        _enabledSources = OfficeRecentDocumentSourceTypes.NormalizeValues(
+            snapshot.OfficeRecentDocumentsEnabledSources,
+            useDefaultWhenEmpty: snapshot.OfficeRecentDocumentsEnabledSources is null);
+    }
+
     private void UpdateDisplay()
     {
         var displayItems = _documents.Select(d => new OfficeRecentDocumentViewModel
@@ -90,15 +123,29 @@ public partial class OfficeRecentDocumentsWidget : UserControl, IDesktopComponen
         var span = DateTime.Now - dateTime;
 
         if (span.TotalMinutes < 1)
-            return "刚刚";
+        {
+            return "\u521a\u521a";
+        }
+
         if (span.TotalMinutes < 60)
-            return $"{(int)span.TotalMinutes} 分钟前";
+        {
+            return $"{(int)span.TotalMinutes} \u5206\u949f\u524d";
+        }
+
         if (span.TotalHours < 24)
-            return $"{(int)span.TotalHours} 小时前";
+        {
+            return $"{(int)span.TotalHours} \u5c0f\u65f6\u524d";
+        }
+
         if (span.TotalDays < 7)
-            return $"{(int)span.TotalDays} 天前";
+        {
+            return $"{(int)span.TotalDays} \u5929\u524d";
+        }
+
         if (span.TotalDays < 30)
-            return $"{(int)(span.TotalDays / 7)} 周前";
+        {
+            return $"{(int)(span.TotalDays / 7)} \u5468\u524d";
+        }
 
         return dateTime.ToString("MM/dd");
     }

LanMountainDesktop/Views/Components/RemovableStorageWidget.axaml

@@ -0,0 +1,119 @@
+<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:fi="using:FluentIcons.Avalonia"
+             mc:Ignorable="d"
+             d:DesignWidth="280"
+             d:DesignHeight="280"
+             x:Class="LanMountainDesktop.Views.Components.RemovableStorageWidget">
+
+    <Border x:Name="RootBorder"
+            CornerRadius="28"
+            BorderThickness="1"
+            Padding="16"
+            ClipToBounds="True">
+        <Grid>
+            <Border x:Name="AccentOrb"
+                    Width="132"
+                    Height="132"
+                    HorizontalAlignment="Right"
+                    VerticalAlignment="Top"
+                    Margin="0,-48,-48,0"
+                    CornerRadius="66"
+                    IsHitTestVisible="False" />
+
+            <Border x:Name="AccentGlow"
+                    Height="76"
+                    Margin="-18,0,-18,-34"
+                    HorizontalAlignment="Stretch"
+                    VerticalAlignment="Bottom"
+                    CornerRadius="38"
+                    Opacity="0.42"
+                    IsHitTestVisible="False" />
+
+            <Grid x:Name="LayoutGrid"
+                  RowDefinitions="Auto,*,Auto,Auto"
+                  RowSpacing="10">
+                <Grid x:Name="HeaderGrid"
+                      ColumnDefinitions="Auto,*"
+                      ColumnSpacing="12">
+                    <Border x:Name="IconBadge"
+                            Width="44"
+                            Height="44"
+                            CornerRadius="22"
+                            VerticalAlignment="Top">
+                        <fi:FluentIcon x:Name="DriveIcon"
+                                       Icon="UsbStick"
+                                       IconVariant="Regular"
+                                       FontSize="24"
+                                       HorizontalAlignment="Center"
+                                       VerticalAlignment="Center" />
+                    </Border>
+
+                    <StackPanel x:Name="HeaderTextStack"
+                                Grid.Column="1"
+                                Spacing="2"
+                                VerticalAlignment="Center">
+                        <TextBlock x:Name="DriveNameTextBlock"
+                                   FontWeight="SemiBold"
+                                   TextWrapping="NoWrap"
+                                   TextTrimming="CharacterEllipsis" />
+                        <TextBlock x:Name="DriveDetailTextBlock"
+                                   TextWrapping="NoWrap"
+                                   TextTrimming="CharacterEllipsis" />
+                    </StackPanel>
+                </Grid>
+
+                <TextBlock x:Name="StatusTextBlock"
+                           Grid.Row="1"
+                           VerticalAlignment="Center"
+                           TextWrapping="Wrap" />
+
+                <Button x:Name="OpenButton"
+                        Grid.Row="2"
+                        Height="42"
+                        Padding="14,0"
+                        CornerRadius="999"
+                        HorizontalAlignment="Stretch"
+                        HorizontalContentAlignment="Center"
+                        Click="OnOpenClick">
+                    <Grid ColumnDefinitions="Auto,*"
+                          ColumnSpacing="8">
+                        <fi:FluentIcon x:Name="OpenButtonIcon"
+                                       Icon="OpenFolder"
+                                       IconVariant="Regular"
+                                       FontSize="16"
+                                       VerticalAlignment="Center" />
+                        <TextBlock x:Name="OpenButtonTextBlock"
+                                   Grid.Column="1"
+                                   FontWeight="SemiBold"
+                                   VerticalAlignment="Center" />
+                    </Grid>
+                </Button>
+
+                <Button x:Name="EjectButton"
+                        Grid.Row="3"
+                        Height="42"
+                        Padding="14,0"
+                        CornerRadius="999"
+                        HorizontalAlignment="Stretch"
+                        HorizontalContentAlignment="Center"
+                        Click="OnEjectClick">
+                    <Grid ColumnDefinitions="Auto,*"
+                          ColumnSpacing="8">
+                        <fi:FluentIcon x:Name="EjectButtonIcon"
+                                       Icon="ArrowEject"
+                                       IconVariant="Regular"
+                                       FontSize="16"
+                                       VerticalAlignment="Center" />
+                        <TextBlock x:Name="EjectButtonTextBlock"
+                                   Grid.Column="1"
+                                   FontWeight="SemiBold"
+                                   VerticalAlignment="Center" />
+                    </Grid>
+                </Button>
+            </Grid>
+        </Grid>
+    </Border>
+</UserControl>

LanMountainDesktop/Views/Components/RemovableStorageWidget.axaml.cs

@@ -0,0 +1,596 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Threading.Tasks;
+using Avalonia;
+using Avalonia.Controls;
+using Avalonia.Interactivity;
+using Avalonia.Media;
+using Avalonia.Styling;
+using Avalonia.Threading;
+using FluentIcons.Avalonia;
+using LanMountainDesktop.ComponentSystem;
+using LanMountainDesktop.Models;
+using LanMountainDesktop.PluginSdk;
+using LanMountainDesktop.Services;
+using LanMountainDesktop.Services.Settings;
+using LanMountainDesktop.Theme;
+
+namespace LanMountainDesktop.Views.Components;
+
+public partial class RemovableStorageWidget : UserControl, IDesktopComponentWidget, IDesktopPageVisibilityAwareComponentWidget, IComponentPlacementContextAware, IDisposable
+{
+    private readonly record struct RemovableStoragePalette(
+        Color BackgroundFrom,
+        Color BackgroundTo,
+        Color Border,
+        Color AccentOrb,
+        Color AccentGlow,
+        Color IconBadgeBackground,
+        Color IconForeground,
+        Color PrimaryText,
+        Color SecondaryText,
+        Color StatusText,
+        Color Accent,
+        Color OnAccent,
+        Color SecondaryButtonBackground,
+        Color SecondaryButtonBorder,
+        Color SecondaryButtonForeground,
+        Color DisabledButtonBackground,
+        Color DisabledButtonBorder,
+        Color DisabledButtonForeground);
+
+    private readonly DispatcherTimer _pollTimer = new()
+    {
+        Interval = TimeSpan.FromSeconds(2)
+    };
+
+    private readonly IRemovableStorageService _removableStorageService = new RemovableStorageService();
+    private readonly LocalizationService _localizationService = new();
+    private ISettingsService _settingsService = HostSettingsFacadeProvider.GetOrCreate().Settings;
+    private IComponentInstanceSettingsStore _componentSettingsStore = HostComponentSettingsStoreProvider.GetOrCreate();
+
+    private IReadOnlyList<RemovableStorageDrive> _connectedDrives = Array.Empty<RemovableStorageDrive>();
+    private string _componentId = BuiltInComponentIds.DesktopRemovableStorage;
+    private string _placementId = string.Empty;
+    private string _languageCode = "zh-CN";
+    private string? _componentColorScheme;
+    private string _selectedDriveRootPath = string.Empty;
+    private string? _statusOverrideText;
+    private double _currentCellSize = 48;
+    private bool _isAttached;
+    private bool _isOnActivePage = true;
+    private bool _isRefreshing;
+    private bool _isDisposed;
+
+    public RemovableStorageWidget()
+    {
+        InitializeComponent();
+
+        _pollTimer.Tick += OnPollTimerTick;
+        AttachedToVisualTree += OnAttachedToVisualTree;
+        DetachedFromVisualTree += OnDetachedFromVisualTree;
+        SizeChanged += OnSizeChanged;
+        ActualThemeVariantChanged += OnActualThemeVariantChanged;
+
+        ApplyCellSize(_currentCellSize);
+        ReloadSettings();
+        ApplyVisualState();
+    }
+
+    public void ApplyCellSize(double cellSize)
+    {
+        _currentCellSize = Math.Max(1, cellSize);
+        ApplyLayoutMetrics();
+    }
+
+    public void SetDesktopPageContext(bool isOnActivePage, bool isEditMode)
+    {
+        _ = isEditMode;
+        var shouldRefresh = !_isOnActivePage && isOnActivePage;
+        _isOnActivePage = isOnActivePage;
+        UpdatePollingState();
+
+        if (shouldRefresh)
+        {
+            _ = RefreshDriveListAsync();
+        }
+    }
+
+    public void SetComponentPlacementContext(string componentId, string? placementId)
+    {
+        _componentId = string.IsNullOrWhiteSpace(componentId)
+            ? BuiltInComponentIds.DesktopRemovableStorage
+            : componentId.Trim();
+        _placementId = placementId?.Trim() ?? string.Empty;
+        RefreshFromSettings();
+    }
+
+    public void RefreshFromSettings()
+    {
+        ReloadSettings();
+        ApplyVisualState();
+    }
+
+    private void OnAttachedToVisualTree(object? sender, VisualTreeAttachmentEventArgs e)
+    {
+        _ = sender;
+        _ = e;
+        _isAttached = true;
+        UpdatePollingState();
+        _ = RefreshDriveListAsync();
+    }
+
+    private void OnDetachedFromVisualTree(object? sender, VisualTreeAttachmentEventArgs e)
+    {
+        _ = sender;
+        _ = e;
+        _isAttached = false;
+        UpdatePollingState();
+    }
+
+    private void OnSizeChanged(object? sender, SizeChangedEventArgs e)
+    {
+        _ = sender;
+        _ = e;
+        ApplyLayoutMetrics();
+    }
+
+    private void OnActualThemeVariantChanged(object? sender, EventArgs e)
+    {
+        _ = sender;
+        _ = e;
+        ApplyVisualState();
+    }
+
+    private async void OnPollTimerTick(object? sender, EventArgs e)
+    {
+        _ = sender;
+        _ = e;
+        await RefreshDriveListAsync();
+    }
+
+    private async void OnOpenClick(object? sender, RoutedEventArgs e)
+    {
+        _ = sender;
+        _ = e;
+        var drive = GetSelectedDrive();
+        if (drive is null)
+        {
+            return;
+        }
+
+        if (_removableStorageService.OpenDrive(drive.RootPath))
+        {
+            _statusOverrideText = L("removable_storage.widget.ready", "Ready to open or eject.");
+            ApplyVisualState();
+            return;
+        }
+
+        _statusOverrideText = L("removable_storage.widget.open_failed", "Failed to open this drive.");
+        ApplyVisualState();
+        await RefreshDriveListAsync();
+    }
+
+    private async void OnEjectClick(object? sender, RoutedEventArgs e)
+    {
+        _ = sender;
+        _ = e;
+        var drive = GetSelectedDrive();
+        if (drive is null)
+        {
+            return;
+        }
+
+        _statusOverrideText = L("removable_storage.widget.ejecting", "Ejecting drive...");
+        ApplyVisualState();
+
+        var ejected = _removableStorageService.EjectDrive(drive.RootPath);
+        _statusOverrideText = ejected
+            ? L("removable_storage.widget.ejecting", "Ejecting drive...")
+            : L("removable_storage.widget.eject_failed", "Could not eject this drive. Close any files on it and try again.");
+        ApplyVisualState();
+        await RefreshDriveListAsync();
+    }
+
+    private async Task RefreshDriveListAsync()
+    {
+        if (_isDisposed || _isRefreshing)
+        {
+            return;
+        }
+
+        _isRefreshing = true;
+
+        try
+        {
+            var previousDriveRoots = new HashSet<string>(
+                _connectedDrives.Select(drive => drive.RootPath),
+                StringComparer.OrdinalIgnoreCase);
+
+            var latestDrives = await Task.Run(() => _removableStorageService.GetConnectedDrives());
+            if (_isDisposed)
+            {
+                return;
+            }
+
+            var newlyInsertedDrive = latestDrives.FirstOrDefault(drive => !previousDriveRoots.Contains(drive.RootPath));
+            _connectedDrives = latestDrives;
+
+            if (newlyInsertedDrive is not null)
+            {
+                _selectedDriveRootPath = newlyInsertedDrive.RootPath;
+            }
+            else if (string.IsNullOrWhiteSpace(_selectedDriveRootPath) ||
+                     !_connectedDrives.Any(drive => string.Equals(drive.RootPath, _selectedDriveRootPath, StringComparison.OrdinalIgnoreCase)))
+            {
+                _selectedDriveRootPath = _connectedDrives.FirstOrDefault().RootPath ?? string.Empty;
+            }
+
+            if (_connectedDrives.Count == 0)
+            {
+                _selectedDriveRootPath = string.Empty;
+                _statusOverrideText = null;
+            }
+            else if (newlyInsertedDrive is not null)
+            {
+                _statusOverrideText = null;
+            }
+
+            ReloadSettings();
+            ApplyVisualState();
+        }
+        catch (Exception ex)
+        {
+            AppLogger.Warn("RemovableStorageWidget", "Failed to refresh removable storage widget.", ex);
+            _statusOverrideText = L("removable_storage.widget.refresh_failed", "Drive list refresh failed.");
+            ApplyVisualState();
+        }
+        finally
+        {
+            _isRefreshing = false;
+        }
+    }
+
+    private void ReloadSettings()
+    {
+        try
+        {
+            var appSettings = _settingsService.LoadSnapshot<AppSettingsSnapshot>(SettingsScope.App);
+            var componentSettings = _componentSettingsStore.LoadForComponent(_componentId, _placementId);
+            _languageCode = _localizationService.NormalizeLanguageCode(appSettings.LanguageCode);
+            _componentColorScheme = componentSettings.ColorSchemeSource;
+        }
+        catch
+        {
+            _languageCode = _localizationService.NormalizeLanguageCode(_languageCode);
+        }
+    }
+
+    private void ApplyVisualState()
+    {
+        var drive = GetSelectedDrive();
+        var hasDrive = drive is not null;
+        var palette = ResolvePalette();
+
+        RootBorder.Background = CreateGradientBrush(palette.BackgroundFrom, palette.BackgroundTo);
+        RootBorder.BorderBrush = CreateBrush(palette.Border);
+        AccentOrb.Background = CreateBrush(palette.AccentOrb);
+        AccentGlow.Background = CreateBrush(palette.AccentGlow);
+        IconBadge.Background = CreateBrush(palette.IconBadgeBackground);
+        DriveIcon.Foreground = CreateBrush(palette.IconForeground);
+        DriveNameTextBlock.Foreground = CreateBrush(palette.PrimaryText);
+        DriveDetailTextBlock.Foreground = CreateBrush(palette.SecondaryText);
+        StatusTextBlock.Foreground = CreateBrush(palette.StatusText);
+
+        if (hasDrive)
+        {
+            ApplyButtonPalette(
+                OpenButton,
+                OpenButtonIcon,
+                OpenButtonTextBlock,
+                palette.Accent,
+                palette.OnAccent,
+                palette.Accent);
+            ApplyButtonPalette(
+                EjectButton,
+                EjectButtonIcon,
+                EjectButtonTextBlock,
+                palette.SecondaryButtonBackground,
+                palette.SecondaryButtonForeground,
+                palette.SecondaryButtonBorder);
+        }
+        else
+        {
+            ApplyButtonPalette(
+                OpenButton,
+                OpenButtonIcon,
+                OpenButtonTextBlock,
+                palette.DisabledButtonBackground,
+                palette.DisabledButtonForeground,
+                palette.DisabledButtonBorder);
+            ApplyButtonPalette(
+                EjectButton,
+                EjectButtonIcon,
+                EjectButtonTextBlock,
+                palette.DisabledButtonBackground,
+                palette.DisabledButtonForeground,
+                palette.DisabledButtonBorder);
+        }
+
+        OpenButton.IsEnabled = hasDrive;
+        EjectButton.IsEnabled = hasDrive;
+
+        OpenButtonTextBlock.Text = L("removable_storage.action.open", "Open");
+        EjectButtonTextBlock.Text = L("removable_storage.action.eject", "Eject");
+
+        if (hasDrive)
+        {
+            var selectedDrive = drive!;
+            DriveNameTextBlock.Text = ResolveDriveName(selectedDrive);
+            DriveDetailTextBlock.Text = selectedDrive.DriveLetter;
+            StatusTextBlock.Text = _statusOverrideText ??
+                                   L("removable_storage.widget.ready", "Ready to open or eject.");
+        }
+        else
+        {
+            DriveNameTextBlock.Text = L("removable_storage.widget.empty_title", "No device inserted");
+            DriveDetailTextBlock.Text = L("removable_storage.widget.empty_subtitle", "Insert a USB drive to show it here.");
+            StatusTextBlock.Text = L("removable_storage.widget.empty_hint", "Buttons stay disabled until a removable device is inserted.");
+        }
+
+        ApplyLayoutMetrics();
+    }
+
+    private void ApplyLayoutMetrics()
+    {
+        var scale = ResolveScale();
+        var width = Bounds.Width > 1 ? Bounds.Width : _currentCellSize * 2;
+
+        var cornerRadius = Math.Clamp(_currentCellSize * 0.44, 18, 34);
+        RootBorder.CornerRadius = new CornerRadius(cornerRadius);
+        RootBorder.Padding = new Thickness(
+            Math.Clamp(16 * scale, 10, 24),
+            Math.Clamp(15 * scale, 10, 22),
+            Math.Clamp(16 * scale, 10, 24),
+            Math.Clamp(15 * scale, 10, 22));
+
+        LayoutGrid.RowSpacing = Math.Clamp(10 * scale, 8, 16);
+        HeaderGrid.ColumnSpacing = Math.Clamp(12 * scale, 8, 16);
+        HeaderTextStack.Spacing = Math.Clamp(2 * scale, 1, 4);
+
+        var badgeSize = Math.Clamp(44 * scale, 38, 60);
+        IconBadge.Width = badgeSize;
+        IconBadge.Height = badgeSize;
+        IconBadge.CornerRadius = new CornerRadius(badgeSize * 0.5);
+        DriveIcon.FontSize = Math.Clamp(24 * scale, 20, 32);
+
+        DriveNameTextBlock.FontSize = Math.Clamp(16 * scale, 13, 24);
+        DriveDetailTextBlock.FontSize = Math.Clamp(11.5 * scale, 10, 16);
+        StatusTextBlock.FontSize = Math.Clamp(12 * scale, 10, 17);
+        StatusTextBlock.MaxWidth = Math.Max(96, width - (RootBorder.Padding.Left + RootBorder.Padding.Right));
+
+        var buttonHeight = Math.Clamp(42 * scale, 38, 54);
+        var buttonPadding = Math.Clamp(14 * scale, 10, 20);
+        var buttonCornerRadius = Math.Clamp(buttonHeight * 0.5, 18, 999);
+
+        OpenButton.Height = buttonHeight;
+        OpenButton.Padding = new Thickness(buttonPadding, 0);
+        OpenButton.CornerRadius = new CornerRadius(buttonCornerRadius);
+
+        EjectButton.Height = buttonHeight;
+        EjectButton.Padding = new Thickness(buttonPadding, 0);
+        EjectButton.CornerRadius = new CornerRadius(buttonCornerRadius);
+
+        OpenButtonIcon.FontSize = Math.Clamp(16 * scale, 14, 20);
+        EjectButtonIcon.FontSize = Math.Clamp(16 * scale, 14, 20);
+        OpenButtonTextBlock.FontSize = Math.Clamp(13 * scale, 11.5, 18);
+        EjectButtonTextBlock.FontSize = Math.Clamp(13 * scale, 11.5, 18);
+
+        AccentOrb.Width = Math.Clamp(width * 0.44, 96, 176);
+        AccentOrb.Height = AccentOrb.Width;
+        AccentOrb.CornerRadius = new CornerRadius(AccentOrb.Width * 0.5);
+        AccentGlow.Height = Math.Clamp(76 * scale, 52, 110);
+        AccentGlow.CornerRadius = new CornerRadius(AccentGlow.Height * 0.5);
+    }
+
+    private RemovableStorageDrive? GetSelectedDrive()
+    {
+        if (_connectedDrives.Count == 0)
+        {
+            return null;
+        }
+
+        if (!string.IsNullOrWhiteSpace(_selectedDriveRootPath))
+        {
+            var selected = _connectedDrives.FirstOrDefault(drive =>
+                string.Equals(drive.RootPath, _selectedDriveRootPath, StringComparison.OrdinalIgnoreCase));
+            if (selected is not null)
+            {
+                return selected;
+            }
+        }
+
+        return _connectedDrives[0];
+    }
+
+    private string ResolveDriveName(RemovableStorageDrive drive)
+    {
+        return string.IsNullOrWhiteSpace(drive.VolumeLabel)
+            ? L("removable_storage.widget.default_name", "Removable Drive")
+            : drive.VolumeLabel.Trim();
+    }
+
+    private RemovableStoragePalette ResolvePalette()
+    {
+        var useMonetColor = ComponentColorSchemeHelper.ShouldUseMonetColor(
+            _componentColorScheme,
+            ComponentColorSchemeHelper.GetCurrentGlobalThemeColorMode());
+
+        if (!useMonetColor)
+        {
+            var nativeAccent = Color.Parse("#FF65A8FF");
+            var nativeBackgroundFrom = Color.Parse("#FF10345F");
+            var nativeBackgroundTo = Color.Parse("#FF0D213E");
+            var nativePrimaryText = Color.Parse("#FFF4F8FF");
+            var nativeSecondaryText = Color.Parse("#C8D9F5FF");
+            var nativeDisabled = Color.Parse("#30465D7A");
+
+            return new RemovableStoragePalette(
+                nativeBackgroundFrom,
+                nativeBackgroundTo,
+                Color.Parse("#6A97D6FF"),
+                Color.Parse("#2F8BC5FF"),
+                Color.Parse("#4C79BFFF"),
+                Color.Parse("#335BAAFF"),
+                Color.Parse("#FFF5FAFF"),
+                nativePrimaryText,
+                nativeSecondaryText,
+                Color.Parse("#D8E7FFFF"),
+                nativeAccent,
+                ColorMath.EnsureContrast(Color.Parse("#FF071420"), nativeAccent, 4.5),
+                Color.Parse("#24FFFFFF"),
+                Color.Parse("#5A9ACDFF"),
+                nativePrimaryText,
+                nativeDisabled,
+                Color.Parse("#4D6782A0"),
+                Color.Parse("#8FA8BDD1"));
+        }
+
+        var surfaceRaised = ResolveThemeColor("AdaptiveSurfaceRaisedBrush", "#FF1A2332");
+        var surfaceOverlay = ResolveThemeColor("AdaptiveSurfaceOverlayBrush", "#FF111827");
+        var accent = ResolveThemeColor("AdaptiveAccentBrush", "#FF61A8FF");
+        var onAccent = ResolveThemeColor("AdaptiveOnAccentBrush", "#FFFFFFFF");
+        var primaryText = ResolveThemeColor("AdaptiveTextPrimaryBrush", "#FFF8FAFC");
+        var secondaryText = ResolveThemeColor("AdaptiveTextSecondaryBrush", "#FFD0D7E3");
+        var mutedText = ResolveThemeColor("AdaptiveTextMutedBrush", "#FFAFB8C7");
+        var disabledButtonBackground = ColorMath.WithAlpha(ColorMath.Blend(surfaceRaised, surfaceOverlay, 0.35), 0xD8);
+        var disabledButtonBorder = ColorMath.WithAlpha(ColorMath.Blend(surfaceRaised, accent, 0.18), 0x88);
+        var disabledButtonForeground = ColorMath.WithAlpha(primaryText, 0x88);
+
+        var backgroundFrom = ColorMath.Blend(surfaceRaised, accent, 0.18);
+        var backgroundTo = ColorMath.Blend(surfaceOverlay, surfaceRaised, 0.46);
+        var border = ColorMath.WithAlpha(ColorMath.Blend(accent, surfaceRaised, 0.38), 0xB8);
+        var iconBadgeBackground = ColorMath.Blend(surfaceRaised, accent, 0.28);
+        var iconForeground = ColorMath.EnsureContrast(accent, iconBadgeBackground, 3.0);
+        var secondaryButtonBackground = ColorMath.WithAlpha(ColorMath.Blend(surfaceRaised, accent, 0.10), 0xE6);
+        var secondaryButtonBorder = ColorMath.WithAlpha(ColorMath.Blend(accent, surfaceRaised, 0.46), 0xC6);
+
+        return new RemovableStoragePalette(
+            backgroundFrom,
+            backgroundTo,
+            border,
+            ColorMath.WithAlpha(accent, 0x28),
+            ColorMath.WithAlpha(ColorMath.Blend(accent, backgroundFrom, 0.26), 0x74),
+            iconBadgeBackground,
+            iconForeground,
+            primaryText,
+            secondaryText,
+            mutedText,
+            accent,
+            onAccent,
+            secondaryButtonBackground,
+            secondaryButtonBorder,
+            primaryText,
+            disabledButtonBackground,
+            disabledButtonBorder,
+            disabledButtonForeground);
+    }
+
+    private Color ResolveThemeColor(string resourceKey, string fallbackHex)
+    {
+        if (this.TryFindResource(resourceKey, out var resource))
+        {
+            if (resource is ISolidColorBrush solidBrush)
+            {
+                return solidBrush.Color;
+            }
+
+            if (resource is SolidColorBrush directSolidBrush)
+            {
+                return directSolidBrush.Color;
+            }
+        }
+
+        return Color.Parse(fallbackHex);
+    }
+
+    private double ResolveScale()
+    {
+        var cellScale = Math.Clamp(_currentCellSize / 48d, 0.72, 2.2);
+        var widthScale = Bounds.Width > 1 ? Math.Clamp(Bounds.Width / 220d, 0.72, 2.4) : 1;
+        var heightScale = Bounds.Height > 1 ? Math.Clamp(Bounds.Height / 220d, 0.72, 2.4) : 1;
+        return Math.Clamp(Math.Min(cellScale, Math.Min(widthScale, heightScale)), 0.72, 2.2);
+    }
+
+    private string L(string key, string fallback)
+    {
+        return _localizationService.GetString(_languageCode, key, fallback);
+    }
+
+    private static void ApplyButtonPalette(
+        Button button,
+        FluentIcon icon,
+        TextBlock textBlock,
+        Color background,
+        Color foreground,
+        Color border)
+    {
+        button.Background = CreateBrush(background);
+        button.BorderBrush = CreateBrush(border);
+        button.BorderThickness = new Thickness(1);
+        button.Foreground = CreateBrush(foreground);
+        icon.Foreground = CreateBrush(foreground);
+        textBlock.Foreground = CreateBrush(foreground);
+    }
+
+    private static IBrush CreateGradientBrush(Color from, Color to)
+    {
+        return new LinearGradientBrush
+        {
+            StartPoint = new RelativePoint(0, 0, RelativeUnit.Relative),
+            EndPoint = new RelativePoint(1, 1, RelativeUnit.Relative),
+            GradientStops = new GradientStops
+            {
+                new GradientStop(from, 0),
+                new GradientStop(to, 1)
+            }
+        };
+    }
+
+    private static SolidColorBrush CreateBrush(Color color)
+    {
+        return new(color);
+    }
+
+    private void UpdatePollingState()
+    {
+        if (_isAttached && _isOnActivePage)
+        {
+            if (!_pollTimer.IsEnabled)
+            {
+                _pollTimer.Start();
+            }
+
+            return;
+        }
+
+        _pollTimer.Stop();
+    }
+
+    public void Dispose()
+    {
+        if (_isDisposed)
+        {
+            return;
+        }
+
+        _isDisposed = true;
+        _pollTimer.Stop();
+        _pollTimer.Tick -= OnPollTimerTick;
+        AttachedToVisualTree -= OnAttachedToVisualTree;
+        DetachedFromVisualTree -= OnDetachedFromVisualTree;
+        SizeChanged -= OnSizeChanged;
+        ActualThemeVariantChanged -= OnActualThemeVariantChanged;
+    }
+}

LanMountainDesktop/Views/Components/StudyDeductionReasonsWidget.axaml

@@ -7,7 +7,7 @@
              d:DesignHeight="220"
              x:Class="LanMountainDesktop.Views.Components.StudyDeductionReasonsWidget">
     <Border x:Name="RootBorder"
-            Classes="glass-strong"
+            Classes="surface-translucent-strong"
             CornerRadius="22"
             Padding="12,10"
             ClipToBounds="True">

LanMountainDesktop/Views/Components/StudyInterruptDensityWidget.axaml

@@ -7,7 +7,7 @@
              d:DesignHeight="220"
              x:Class="LanMountainDesktop.Views.Components.StudyInterruptDensityWidget">
     <Border x:Name="RootBorder"
-            Classes="glass-strong"
+            Classes="surface-translucent-strong"
             CornerRadius="22"
             Padding="14,10"
             ClipToBounds="True">

LanMountainDesktop/Views/Components/StudyNoiseCurveWidget.axaml

@@ -1,4 +1,4 @@
-<UserControl xmlns="https://github.com/avaloniaui"
+<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"
@@ -8,7 +8,7 @@
              d:DesignHeight="320"
              x:Class="LanMountainDesktop.Views.Components.StudyNoiseCurveWidget">
     <Border x:Name="RootBorder"
-            Classes="glass-strong"
+            Classes="surface-translucent-strong"
             CornerRadius="24"
             Padding="14,10"
             ClipToBounds="True">

LanMountainDesktop/Views/Components/StudyNoiseDistributionWidget.axaml

@@ -8,7 +8,7 @@
              d:DesignHeight="320"
              x:Class="LanMountainDesktop.Views.Components.StudyNoiseDistributionWidget">
     <Border x:Name="RootBorder"
-            Classes="glass-strong"
+            Classes="surface-translucent-strong"
             CornerRadius="24"
             Padding="14,10"
             ClipToBounds="True">

LanMountainDesktop/Views/Components/StudyScoreOverviewWidget.axaml

@@ -7,7 +7,7 @@
              d:DesignHeight="360"
              x:Class="LanMountainDesktop.Views.Components.StudyScoreOverviewWidget">
     <Border x:Name="RootBorder"
-            Classes="glass-strong"
+            Classes="surface-translucent-strong"
             CornerRadius="24"
             Padding="16,14"
             ClipToBounds="True">

LanMountainDesktop/Views/Components/StudySessionControlWidget.axaml

@@ -8,7 +8,7 @@
              d:DesignHeight="150"
              x:Class="LanMountainDesktop.Views.Components.StudySessionControlWidget">
     <Border x:Name="RootBorder"
-            Classes="glass-strong"
+            Classes="surface-translucent-strong"
             CornerRadius="18"
             Padding="14,10"
             ClipToBounds="True">

LanMountainDesktop/Views/Components/StudySessionHistoryWidget.axaml

@@ -7,7 +7,7 @@
              d:DesignHeight="220"
              x:Class="LanMountainDesktop.Views.Components.StudySessionHistoryWidget">
     <Border x:Name="RootBorder"
-            Classes="glass-strong"
+            Classes="surface-translucent-strong"
             CornerRadius="22"
             Padding="12,10"
             ClipToBounds="True">

LanMountainDesktop/Views/Components/WhiteboardWidget.axaml.cs

@@ -1,4 +1,5 @@
-using System;
+using System;
+using System.Collections.Generic;
 using System.IO;
 using System.Linq;
 using System.Reflection;
@@ -9,13 +10,18 @@ using Avalonia.Interactivity;
 using Avalonia.Media;
 using Avalonia.Platform.Storage;
 using Avalonia.Styling;
+using Avalonia.Threading;
 using DotNetCampus.Inking;
+using DotNetCampus.Inking.Primitive;
 using FluentIcons.Avalonia;
+using LanMountainDesktop.ComponentSystem;
+using LanMountainDesktop.Models;
+using LanMountainDesktop.Services;
 using SkiaSharp;
 
 namespace LanMountainDesktop.Views.Components;
 
-public partial class WhiteboardWidget : UserControl, IDesktopComponentWidget
+public partial class WhiteboardWidget : UserControl, IDesktopComponentWidget, IComponentPlacementContextAware, IDisposable
 {
     private enum WhiteboardToolMode
     {
@@ -24,11 +30,22 @@ public partial class WhiteboardWidget : UserControl, IDesktopComponentWidget
     }
 
     private static readonly PropertyInfo? StrokeColorProperty = typeof(SkiaStroke).GetProperty(nameof(SkiaStroke.Color));
+    private static readonly PropertyInfo? StrokePointListProperty = typeof(SkiaStroke).GetProperty("PointList");
     private readonly int _baseWidthCells;
+    private readonly IComponentInstanceSettingsStore _componentSettingsStore = HostComponentSettingsStoreProvider.GetOrCreate();
+    private readonly IWhiteboardNotePersistenceService _notePersistenceService = new WhiteboardNotePersistenceService();
+    private readonly DispatcherTimer _noteSaveTimer = new() { Interval = TimeSpan.FromMinutes(5) };
     private double _currentCellSize = 48;
     private WhiteboardToolMode _toolMode = WhiteboardToolMode.Pen;
     private bool? _isNightModeApplied;
     private SKColor _currentInkColor = SKColors.Black;
+    private string _componentId = BuiltInComponentIds.DesktopWhiteboard;
+    private string _placementId = string.Empty;
+    private int _noteRetentionDays = WhiteboardNoteRetentionPolicy.DefaultDays;
+    private bool _isApplyingPersistedSnapshot;
+    private bool _noteDirty;
+    private int _noteLoadRevision;
+    private bool _disposed;
 
     public WhiteboardWidget()
         : this(baseWidthCells: 2)
@@ -43,21 +60,26 @@ public partial class WhiteboardWidget : UserControl, IDesktopComponentWidget
         DetachedFromVisualTree += OnDetachedFromVisualTree;
         SizeChanged += OnSizeChanged;
         ActualThemeVariantChanged += OnActualThemeVariantChanged;
+        _noteSaveTimer.Tick += OnNoteSaveTimerTick;
 
         ConfigureInkCanvas();
         ApplyCellSize(_currentCellSize);
+        RefreshFromSettings();
         ApplyThemeVisual(force: true);
         SetToolMode(WhiteboardToolMode.Pen);
     }
 
+    public int NoteRetentionDays => _noteRetentionDays;
+
     private void OnAttachedToVisualTree(object? sender, VisualTreeAttachmentEventArgs e)
     {
         ApplyThemeVisual(force: true);
+        SchedulePersistedNoteLoad();
     }
 
     private void OnDetachedFromVisualTree(object? sender, VisualTreeAttachmentEventArgs e)
     {
-        // Keep all state in-memory for lightweight re-attach scenarios.
+        PersistNoteImmediately();
     }
 
     private void OnSizeChanged(object? sender, SizeChangedEventArgs e)
@@ -79,6 +101,9 @@ public partial class WhiteboardWidget : UserControl, IDesktopComponentWidget
         settings.EraserSize = new Size(20, 20);
         settings.IsBitmapCacheEnabled = true;
         settings.MaxBitmapCacheSize = 2048;
+        InkCanvas.StrokeCollected += OnInkCanvasStrokeCollected;
+        InkCanvas.PointerReleased += OnInkCanvasPointerReleased;
+        InkCanvas.PointerCaptureLost += OnInkCanvasPointerCaptureLost;
     }
 
     public void ApplyCellSize(double cellSize)
@@ -134,6 +159,63 @@ public partial class WhiteboardWidget : UserControl, IDesktopComponentWidget
         RefreshToolButtonVisuals();
     }
 
+    public void SetComponentPlacementContext(string componentId, string? placementId)
+    {
+        var nextComponentId = string.IsNullOrWhiteSpace(componentId)
+            ? BuiltInComponentIds.DesktopWhiteboard
+            : componentId.Trim();
+        var nextPlacementId = placementId?.Trim() ?? string.Empty;
+
+        if (_noteDirty &&
+            HasValidPersistenceContext() &&
+            (string.Compare(_componentId, nextComponentId, StringComparison.OrdinalIgnoreCase) != 0 ||
+             string.Compare(_placementId, nextPlacementId, StringComparison.OrdinalIgnoreCase) != 0))
+        {
+            PersistNoteImmediately();
+        }
+
+        _componentId = nextComponentId;
+        _placementId = nextPlacementId;
+        RefreshFromSettings();
+        ClearAllStrokes();
+        SchedulePersistedNoteLoad();
+    }
+
+    public void RefreshFromSettings()
+    {
+        try
+        {
+            if (!HasValidPersistenceContext())
+            {
+                _noteRetentionDays = WhiteboardNoteRetentionPolicy.DefaultDays;
+                return;
+            }
+
+            var snapshot = _componentSettingsStore.LoadForComponent(_componentId, _placementId);
+            _noteRetentionDays = NormalizeRetentionDays(snapshot.WhiteboardNoteRetentionDays);
+            _notePersistenceService.TryDeleteExpiredNote(_componentId, _placementId, _noteRetentionDays);
+        }
+        catch
+        {
+            _noteRetentionDays = WhiteboardNoteRetentionPolicy.DefaultDays;
+        }
+    }
+
+    public void Dispose()
+    {
+        if (_disposed)
+        {
+            return;
+        }
+
+        _disposed = true;
+        _noteSaveTimer.Stop();
+        _noteSaveTimer.Tick -= OnNoteSaveTimerTick;
+        InkCanvas.StrokeCollected -= OnInkCanvasStrokeCollected;
+        InkCanvas.PointerReleased -= OnInkCanvasPointerReleased;
+        InkCanvas.PointerCaptureLost -= OnInkCanvasPointerCaptureLost;
+    }
+
     private void RecolorAllStrokes(SKColor targetColor)
     {
         for (var i = 0; i < InkCanvas.Strokes.Count; i++)
@@ -183,6 +265,14 @@ public partial class WhiteboardWidget : UserControl, IDesktopComponentWidget
         return false;
     }
 
+    private static int NormalizeRetentionDays(int days)
+    {
+        return WhiteboardNoteRetentionPolicy.NormalizeDays(
+            days <= 0
+                ? WhiteboardNoteRetentionPolicy.DefaultDays
+                : days);
+    }
+
     private static double CalculateRelativeLuminance(Color color)
     {
         static double ToLinear(double channel)
@@ -267,25 +357,8 @@ public partial class WhiteboardWidget : UserControl, IDesktopComponentWidget
 
     private void OnClearButtonClick(object? sender, RoutedEventArgs e)
     {
-        var strokeList = InkCanvas.Strokes.ToList();
+        ClearAllStrokes();
-        foreach (var stroke in strokeList)
+        QueueNoteSave();
-        {
-            try
-            {
-                if (ReferenceEquals(stroke.InkCanvas, InkCanvas.AvaloniaSkiaInkCanvas))
-                {
-                    InkCanvas.AvaloniaSkiaInkCanvas.RemoveStaticStroke(stroke);
-                }
-            }
-            catch
-            {
-                // Keep the widget alive even if one stroke removal fails.
-            }
-        }
-
-        InkCanvas.AvaloniaSkiaInkCanvas.UseBitmapCache(false);
-        InkCanvas.AvaloniaSkiaInkCanvas.InvalidateBitmapCache();
-        InkCanvas.InvalidateVisual();
     }
 
     private async void OnExportButtonClick(object? sender, RoutedEventArgs e)
@@ -358,4 +431,273 @@ public partial class WhiteboardWidget : UserControl, IDesktopComponentWidget
 
         svgCanvas.Flush();
     }
+
+    private void OnInkCanvasStrokeCollected(object? sender, DotNetCampus.Inking.Contexts.AvaloniaSkiaInkCanvasStrokeCollectedEventArgs e)
+    {
+        _ = sender;
+        _ = e;
+        QueueNoteSave();
+    }
+
+    private void OnInkCanvasPointerReleased(object? sender, Avalonia.Input.PointerReleasedEventArgs e)
+    {
+        _ = sender;
+        _ = e;
+        QueueNoteSave();
+    }
+
+    private void OnInkCanvasPointerCaptureLost(object? sender, Avalonia.Input.PointerCaptureLostEventArgs e)
+    {
+        _ = sender;
+        _ = e;
+        QueueNoteSave();
+    }
+
+    private void OnNoteSaveTimerTick(object? sender, EventArgs e)
+    {
+        _ = sender;
+        if (_disposed || _isApplyingPersistedSnapshot || !HasValidPersistenceContext())
+        {
+            _noteSaveTimer.Stop();
+            return;
+        }
+
+        if (!_noteDirty)
+        {
+            _noteSaveTimer.Stop();
+            return;
+        }
+
+        var noteSnapshot = BuildNoteSnapshot();
+        var componentId = _componentId;
+        var placementId = _placementId;
+        var retentionDays = _noteRetentionDays;
+        _noteDirty = false;
+        _noteSaveTimer.Stop();
+        _ = Task.Run(() => _notePersistenceService.SaveNote(componentId, placementId, noteSnapshot, retentionDays));
+    }
+
+    private void QueueNoteSave()
+    {
+        if (_disposed || _isApplyingPersistedSnapshot || !HasValidPersistenceContext())
+        {
+            return;
+        }
+
+        _noteDirty = true;
+        if (!_noteSaveTimer.IsEnabled)
+        {
+            _noteSaveTimer.Start();
+        }
+    }
+
+    private void PersistNoteImmediately()
+    {
+        if (_disposed || _isApplyingPersistedSnapshot || !HasValidPersistenceContext())
+        {
+            return;
+        }
+
+        if (!_noteDirty)
+        {
+            return;
+        }
+
+        _noteDirty = false;
+        _noteSaveTimer.Stop();
+        var noteSnapshot = BuildNoteSnapshot();
+        var componentId = _componentId;
+        var placementId = _placementId;
+        var retentionDays = _noteRetentionDays;
+        _ = Task.Run(() => _notePersistenceService.SaveNote(
+            componentId,
+            placementId,
+            noteSnapshot,
+            retentionDays));
+    }
+
+    private async void SchedulePersistedNoteLoad()
+    {
+        if (!HasValidPersistenceContext())
+        {
+            return;
+        }
+
+        var revision = ++_noteLoadRevision;
+        var componentId = _componentId;
+        var placementId = _placementId;
+        var retentionDays = _noteRetentionDays;
+
+        try
+        {
+            var noteSnapshot = await Task.Run(() => _notePersistenceService.LoadNote(componentId, placementId, retentionDays));
+            if (_disposed || revision != _noteLoadRevision ||
+                !string.Equals(_componentId, componentId, StringComparison.OrdinalIgnoreCase) ||
+                !string.Equals(_placementId, placementId, StringComparison.OrdinalIgnoreCase))
+            {
+                return;
+            }
+
+            Dispatcher.UIThread.Post(() =>
+            {
+                if (_disposed || revision != _noteLoadRevision)
+                {
+                    return;
+                }
+
+                _isApplyingPersistedSnapshot = true;
+                try
+                {
+                    ClearAllStrokes();
+                    ApplyNoteSnapshot(noteSnapshot);
+                    RecolorAllStrokes(_currentInkColor);
+                }
+                finally
+                {
+                    _isApplyingPersistedSnapshot = false;
+                }
+            });
+        }
+        catch
+        {
+            // Best effort only. Whiteboard should stay usable if persistence is unavailable.
+        }
+    }
+
+    private WhiteboardNoteSnapshot BuildNoteSnapshot()
+    {
+        return new WhiteboardNoteSnapshot
+        {
+            Strokes = InkCanvas.Strokes
+                .Select(BuildStrokeSnapshot)
+                .Where(static stroke => stroke.Points.Count > 0)
+                .ToList()
+        };
+    }
+
+    private static WhiteboardStrokeSnapshot BuildStrokeSnapshot(SkiaStroke stroke)
+    {
+        var pointList = TryGetStrokePoints(stroke);
+        return new WhiteboardStrokeSnapshot
+        {
+            Color = ToHexColor(stroke.Color),
+            InkThickness = stroke.InkThickness,
+            IgnorePressure = stroke.IgnorePressure,
+            Points = pointList
+                .Select(static point => new WhiteboardStylusPointSnapshot
+                {
+                    X = point.X,
+                    Y = point.Y,
+                    Pressure = point.Pressure,
+                    Width = point.Width ?? 0,
+                    Height = point.Height ?? 0
+                })
+                .ToList()
+        };
+    }
+
+    private void ApplyNoteSnapshot(WhiteboardNoteSnapshot snapshot)
+    {
+        if (snapshot.Strokes.Count == 0)
+        {
+            return;
+        }
+
+        var renderer = InkCanvas.AvaloniaSkiaInkCanvas.Settings.InkStrokeRenderer;
+        foreach (var strokeSnapshot in snapshot.Strokes)
+        {
+            var stylusPoints = strokeSnapshot.Points
+                .Select(ConvertStylusPoint)
+                .ToList();
+            if (stylusPoints.Count == 0)
+            {
+                continue;
+            }
+
+            var path = renderer.RenderInkToPath(stylusPoints, strokeSnapshot.InkThickness);
+            var staticStroke = SkiaStroke.CreateStaticStroke(
+                InkId.NewId(),
+                path,
+                new StylusPointListSpan(stylusPoints, 0, stylusPoints.Count),
+                ParseStrokeColor(strokeSnapshot.Color),
+                (float)strokeSnapshot.InkThickness,
+                strokeSnapshot.IgnorePressure,
+                renderer);
+            InkCanvas.AvaloniaSkiaInkCanvas.AddStaticStroke(staticStroke);
+        }
+
+        InkCanvas.AvaloniaSkiaInkCanvas.UpdateBitmapCache();
+        InkCanvas.InvalidateVisual();
+    }
+
+    private static InkStylusPoint ConvertStylusPoint(WhiteboardStylusPointSnapshot point)
+    {
+        return new InkStylusPoint(point.X, point.Y, (float)Math.Clamp(point.Pressure, 0f, 1f))
+        {
+            Width = point.Width > 0 ? point.Width : null,
+            Height = point.Height > 0 ? point.Height : null
+        };
+    }
+
+    private static SKColor ParseStrokeColor(string? value)
+    {
+        if (!string.IsNullOrWhiteSpace(value))
+        {
+            try
+            {
+                var color = Color.Parse(value);
+                return new SKColor(color.R, color.G, color.B, color.A);
+            }
+            catch
+            {
+                // Fall through to the default color.
+            }
+        }
+
+        return SKColors.Black;
+    }
+
+    private static string ToHexColor(SKColor color)
+    {
+        return $"#{color.Alpha:X2}{color.Red:X2}{color.Green:X2}{color.Blue:X2}";
+    }
+
+    private void ClearAllStrokes()
+    {
+        var strokeList = InkCanvas.Strokes.ToList();
+        foreach (var stroke in strokeList)
+        {
+            try
+            {
+                if (ReferenceEquals(stroke.InkCanvas, InkCanvas.AvaloniaSkiaInkCanvas))
+                {
+                    InkCanvas.AvaloniaSkiaInkCanvas.RemoveStaticStroke(stroke);
+                }
+            }
+            catch
+            {
+                // Keep the widget alive even if one stroke removal fails.
+            }
+        }
+
+        InkCanvas.AvaloniaSkiaInkCanvas.UseBitmapCache(false);
+        InkCanvas.AvaloniaSkiaInkCanvas.InvalidateBitmapCache();
+        InkCanvas.InvalidateVisual();
+    }
+
+    private bool HasValidPersistenceContext()
+    {
+        return !string.IsNullOrWhiteSpace(_componentId) &&
+               !string.IsNullOrWhiteSpace(_placementId);
+    }
+
+    private static IReadOnlyList<InkStylusPoint> TryGetStrokePoints(SkiaStroke stroke)
+    {
+        if (StrokePointListProperty?.GetValue(stroke) is IReadOnlyList<InkStylusPoint> pointList)
+        {
+            return pointList;
+        }
+
+        return Array.Empty<InkStylusPoint>();
+    }
 }

LanMountainDesktop/Views/MainWindow.ComponentSystem.cs

@@ -398,10 +398,12 @@ public partial class MainWindow
         _clockDisplayFormat = snapshot.ClockDisplayFormat == "HourMinute"
             ? ClockDisplayFormat.HourMinute
             : ClockDisplayFormat.HourMinuteSecond;
+        _statusBarClockTransparentBackground = snapshot.StatusBarClockTransparentBackground;
 
         if (ClockWidget is not null)
         {
             ClockWidget.SetDisplayFormat(_clockDisplayFormat);
+            ClockWidget.SetTransparentBackground(_statusBarClockTransparentBackground);
         }
     }
 
@@ -413,6 +415,7 @@ public partial class MainWindow
         if (ClockWidget is not null)
         {
             ClockWidget.IsVisible = showClock;
+            ClockWidget.SetTransparentBackground(_statusBarClockTransparentBackground);
             if (showClock)
             {
                 ClockWidget.SetDisplayFormat(_clockDisplayFormat);

LanMountainDesktop/Views/MainWindow.SettingsHardCut.Stubs.cs

@@ -3,8 +3,9 @@ using System.Globalization;
 using System.IO;
 using System.Linq;
 using System.Threading.Tasks;
-using Avalonia;
 using Avalonia.Controls;
+using Avalonia.Input;
+using Avalonia;
 using Avalonia.Interactivity;
 using Avalonia.Media;
 using Avalonia.Media.Imaging;
@@ -102,7 +103,11 @@ public partial class MainWindow
     private void ApplyLocalization()
     {
         Title = L("app.title", "LanMountainDesktop");
-        BackToWindowsTextBlock.Text = L("button.back_to_windows", "Back to Windows");
+        var platformName = OperatingSystem.IsWindows() ? "Windows" 
+            : OperatingSystem.IsMacOS() ? "macOS" 
+            : "Linux";
+        BackToWindowsTextBlock.Text = Lf("button.back_to_platform", "Back to {0}", platformName);
+        ToolTip.SetTip(BackToWindowsButton, Lf("tooltip.back_to_platform", "Back to {0}", platformName));
         ComponentLibraryTitleTextBlock.Text = L("component_library.title", "Widgets");
         LauncherTitleTextBlock.Text = L("launcher.title", "App Launcher");
         LauncherSubtitleTextBlock.Text = OperatingSystem.IsLinux()
@@ -547,6 +552,7 @@ public partial class MainWindow
             EnableDynamicTaskbarActions = _enableDynamicTaskbarActions,
             TaskbarLayoutMode = _taskbarLayoutMode,
             ClockDisplayFormat = _clockDisplayFormat == ClockDisplayFormat.HourMinute ? "HourMinute" : "HourMinuteSecond",
+            StatusBarClockTransparentBackground = _statusBarClockTransparentBackground,
             StatusBarSpacingMode = _statusBarSpacingMode,
             StatusBarCustomSpacingPercent = _statusBarCustomSpacingPercent
         };

LanMountainDesktop/Views/MainWindow.axaml

@@ -1,4 +1,4 @@
-<Window xmlns="https://github.com/avaloniaui"
+<Window xmlns="https://github.com/avaloniaui"
         xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
         xmlns:vm="using:LanMountainDesktop.ViewModels"
         xmlns:ui="using:FluentAvalonia.UI.Controls"
@@ -158,7 +158,7 @@
 
                                     <Border x:Name="LauncherPagePanel"
                                             Grid.Column="1"
-                                            Classes="glass-panel"
+                                            Classes="surface-translucent-panel"
                                             ClipToBounds="False"
                                             CornerRadius="36"
                                             Padding="18">
@@ -166,11 +166,9 @@
                                             <StackPanel Spacing="4">
                                                 <TextBlock x:Name="LauncherTitleTextBlock"
                                                            FontSize="24"
-                                                           FontWeight="SemiBold"
+                                                           FontWeight="SemiBold" />
-                                                           Text="App Launcher" />
                                                 <TextBlock x:Name="LauncherSubtitleTextBlock"
-                                                           Foreground="{DynamicResource AdaptiveTextSecondaryBrush}"
+                                                           Foreground="{DynamicResource AdaptiveTextSecondaryBrush}" />
-                                                           Text="Apps and folders from Windows Start Menu." />
                                             </StackPanel>
 
                                             <Grid Grid.Row="1"
@@ -188,7 +186,7 @@
                                                       Opacity="{DynamicResource AdaptiveGlassOverlayOpacity}"
                                                       PointerPressed="OnLauncherFolderOverlayPointerPressed">
                                                     <Border x:Name="LauncherFolderPanel"
-                                                            Classes="mica-strong"
+                                                            Classes="surface-solid-strong"
                                                             HorizontalAlignment="Center"
                                                             VerticalAlignment="Center"
                                                             Margin="52"
@@ -216,8 +214,7 @@
                                                                            Grid.Column="1"
                                                                            HorizontalAlignment="Center"
                                                                            VerticalAlignment="Center"
-                                                                           FontWeight="SemiBold"
+                                                                           FontWeight="SemiBold" />
-                                                                           Text="Folder" />
                                                                 <Button x:Name="LauncherFolderCloseButton"
                                                                         Grid.Column="2"
                                                                         Width="38"
@@ -266,7 +263,7 @@
                         </Border>
 
                         <Border x:Name="BottomTaskbarContainer"
-                                Classes="glass-island"
+                                Classes="surface-translucent-island"
                                 Grid.Row="0"
                                 Grid.Column="0"
                                 Grid.ColumnSpan="1"
@@ -290,8 +287,7 @@
                                                 Background="Transparent"
                                                 BorderThickness="0"
                                                 Foreground="{DynamicResource AdaptiveTextPrimaryBrush}"
-                                                Click="OnMinimizeClick"
+                                                Click="OnMinimizeClick">
-                                                ToolTip.Tip="&#22238;&#21040;Windows">
                                             <StackPanel Orientation="Horizontal"
                                                         HorizontalAlignment="Center"
                                                         VerticalAlignment="Center"
@@ -300,8 +296,7 @@
                                                                Icon="Window"
                                                                IconVariant="Regular" />
                                                 <TextBlock x:Name="BackToWindowsTextBlock"
-                                                           Foreground="{DynamicResource AdaptiveTextPrimaryBrush}"
+                                                           Foreground="{DynamicResource AdaptiveTextPrimaryBrush}" />
-                                                           Text="&#22238;&#21040;Windows" />
                                             </StackPanel>
                                         </Button>
                                     </Grid>
@@ -436,7 +431,7 @@
         <Border x:Name="ComponentLibraryWindow"
                 IsVisible="False"
                 Opacity="0"
-                Classes="glass-strong"
+                Classes="surface-translucent-strong"
                 HorizontalAlignment="Center"
                 VerticalAlignment="Bottom"
                 Width="620"
@@ -481,7 +476,7 @@
                 </Grid>
 
                 <Border Grid.Row="1"
-                        Classes="glass-panel"
+                        Classes="surface-translucent-panel"
                         CornerRadius="12"
                         Padding="14">
                     <Grid>

LanMountainDesktop/Views/MainWindow.axaml.cs

@@ -131,6 +131,7 @@ public partial class MainWindow : Window, ISettingsWindowAnchorProvider
     private string _gridSpacingPreset = "Relaxed";
     private string _statusBarSpacingMode = "Relaxed";
     private int _statusBarCustomSpacingPercent = 12;
+    private bool _statusBarClockTransparentBackground;
     private int _desktopEdgeInsetPercent = DefaultEdgeInsetPercent;
     private string _taskbarLayoutMode = TaskbarLayoutBottomFullRowMacStyle;
     private string _languageCode = "zh-CN";

LanMountainDesktop/Views/SettingsPages/StatusBarSettingsPage.axaml

@@ -38,6 +38,20 @@
                         </ComboBox>
                     </Grid>
                 </ui:SettingsExpanderItem>
+                <ui:SettingsExpanderItem>
+                    <Grid ColumnDefinitions="*,Auto"
+                          ColumnSpacing="16">
+                        <StackPanel Spacing="2">
+                            <TextBlock Text="{Binding ClockTransparentBackgroundLabel}" />
+                            <TextBlock Text="{Binding ClockTransparentBackgroundDescription}"
+                                       Opacity="0.75"
+                                       TextWrapping="Wrap" />
+                        </StackPanel>
+                        <ToggleSwitch Grid.Column="1"
+                                      IsChecked="{Binding ClockTransparentBackground}"
+                                      VerticalAlignment="Center" />
+                    </Grid>
+                </ui:SettingsExpanderItem>
             </ui:SettingsExpander>
 
             <Separator Classes="settings-separator" />

testicon/testicon.csproj

@@ -5,6 +5,7 @@
     <TargetFramework>net10.0</TargetFramework>
     <ImplicitUsings>enable</ImplicitUsings>
     <Nullable>enable</Nullable>
+    <Version>1.0.0</Version>
   </PropertyGroup>
 
 </Project>