0.7.1

This reverts commit aeae4be060.

.github/workflows/airappmarket-validate.yml

@@ -1,27 +0,0 @@
-name: AirAppMarket Validate
-
-on:
-  push:
-    paths:
-      - "airappmarket/**"
-      - ".github/workflows/airappmarket-validate.yml"
-  pull_request:
-    paths:
-      - "airappmarket/**"
-      - ".github/workflows/airappmarket-validate.yml"
-
-jobs:
-  validate:
-    runs-on: ubuntu-latest
-
-    steps:
-      - name: Checkout
-        uses: actions/checkout@v4
-
-      - name: Setup .NET
-        uses: actions/setup-dotnet@v4
-        with:
-          dotnet-version: "10.0.x"
-
-      - name: Validate AirAppMarket index
-        run: dotnet run --project airappmarket/tools/AirAppMarket.Validator -- airappmarket/index.json airappmarket/schema/airappmarket-index.schema.json

Directory.Build.props

@@ -0,0 +1,8 @@
+<Project>
+  <PropertyGroup>
+    <Version>1.0.0</Version>
+    <TargetFramework Condition="'$(TargetFramework)' == ''">net10.0</TargetFramework>
+    <Nullable Condition="'$(Nullable)' == ''">enable</Nullable>
+    <ImplicitUsings Condition="'$(ImplicitUsings)' == ''">enable</ImplicitUsings>
+  </PropertyGroup>
+</Project>

LanAirApp/README.md

@@ -1,33 +0,0 @@
-# LanAirApp (Mirror)
-
-## 中文
-
-这里的 `LanAirApp/` 是放在宿主仓库里的镜像副本，只用于本地联调和工作区构建，不是插件市场或插件开发资料的最终权威来源。
-
-### 这份镜像的角色
-
-- 提供本地工作区里的 `airappmarket` 索引副本
-- 提供插件文档、工具和样例镜像，便于和宿主一起联调
-- 不承担宿主运行时职责
-
-### 权威来源
-
-- 插件市场与开发文档：独立 `LanAirApp` 仓库
-- 权威示例插件：独立 `LanMountainDesktop.SamplePlugin`
-- 本目录中的 `samples/LanMountainDesktop.SamplePlugin` 只是镜像模板副本
-
-## English
-
-This `LanAirApp/` directory is a mirror that lives inside the host repository. It exists for local workspace integration and build convenience only. It is not the final authority for the plugin market or developer-facing plugin materials.
-
-### Role of this mirror
-
-- keep a local copy of the `airappmarket` index for workspace integration
-- keep mirrored docs, tools, and sample templates for local development
-- avoid duplicating host runtime responsibilities
-
-### Sources of truth
-
-- Plugin market and developer docs: standalone `LanAirApp`
-- Authoritative sample plugin: standalone `LanMountainDesktop.SamplePlugin`
-- `samples/LanMountainDesktop.SamplePlugin` in this mirror is template/mirror content only

LanAirApp/docs/PLUGIN_DEVELOPMENT.md

@@ -1,16 +0,0 @@
-# 插件开发指南
-
-## 中文
-
-使用 `LanMountainDesktop.PluginSdk` 开发插件时，至少需要准备：
-
-- `plugin.json`
-- 插件入口程序集
-- 入口类
-- 本地化资源
-
-推荐从示例插件开始，先完成清单、入口、设置页和桌面组件，再逐步扩展业务逻辑。
-
-## English
-
-To build a plugin with `LanMountainDesktop.PluginSdk`, prepare the manifest, plugin assembly, entrance class, and localization resources first.

LanAirApp/docs/PLUGIN_PACKAGING.md

@@ -1,14 +0,0 @@
-# 插件打包指南
-
-## 中文
-
-阑山桌面插件的标准安装格式为 `.laapp`。插件项目应在仓库根目录提供：
-
-- `.laapp` 安装包
-- `README.md`
-
-官方市场索引只负责记录链接和校验信息。
-
-## English
-
-The standard package format is `.laapp`. Plugin repositories should keep the package and `README.md` in the repository root, while the official market index stores metadata and validation data.

LanAirApp/samples/LanMountainDesktop.SamplePlugin/LanMountainDesktop.SamplePlugin.csproj

@@ -1,30 +0,0 @@
-<Project Sdk="Microsoft.NET.Sdk">
-
-  <PropertyGroup>
-    <TargetFramework>net10.0</TargetFramework>
-    <ImplicitUsings>enable</ImplicitUsings>
-    <Nullable>enable</Nullable>
-    <Version>1.0.0</Version>
-    <EnableDynamicLoading>true</EnableDynamicLoading>
-    <OutputPath>bin\$(Configuration)\$(TargetFramework)\content\</OutputPath>
-    <AppendTargetFrameworkToOutputPath>false</AppendTargetFrameworkToOutputPath>
-    <AppendRuntimeIdentifierToOutputPath>false</AppendRuntimeIdentifierToOutputPath>
-    <PluginPackageOutputDirectory>$(MSBuildThisFileDirectory)artifacts\Packages\</PluginPackageOutputDirectory>
-    <PluginPackagePath>$(PluginPackageOutputDirectory)$(AssemblyName).$(Version).laapp</PluginPackagePath>
-    <LegacyLoosePluginOutputDirectory>$(MSBuildThisFileDirectory)artifacts\Loose\</LegacyLoosePluginOutputDirectory>
-  </PropertyGroup>
-
-  <ItemGroup>
-    <ProjectReference Include="..\..\..\LanMountainDesktop.PluginSdk\LanMountainDesktop.PluginSdk.csproj" Private="false" />
-    <None Include="plugin.json" CopyToOutputDirectory="PreserveNewest" />
-    <None Include="Localization\*.json" CopyToOutputDirectory="PreserveNewest" />
-  </ItemGroup>
-
-  <Target Name="CreateLaappPackage" AfterTargets="Build">
-    <MakeDir Directories="$(PluginPackageOutputDirectory)" />
-    <RemoveDir Directories="$(LegacyLoosePluginOutputDirectory)" />
-    <Delete Files="$(PluginPackagePath)" TreatErrorsAsWarnings="true" />
-    <ZipDirectory SourceDirectory="$(OutputPath)" DestinationFile="$(PluginPackagePath)" />
-  </Target>
-
-</Project>

LanAirApp/samples/LanMountainDesktop.SamplePlugin/Localization/en-US.json

@@ -1,84 +0,0 @@
-{
-  "settings.page_title": "Plugin Status",
-  "plugin.name": "LanMountain Sample Plugin",
-  "plugin.description": "Example plugin used to validate PluginSdk loading, services, communication, and localization.",
-  "widget.display_name": "Sample Plugin Status Clock",
-  "widget.category": "Plugins",
-  "settings.header.title": "Sample Plugin Capability Inspector",
-  "settings.section.info": "Plugin Info",
-  "settings.section.capabilities": "Accessible Capabilities",
-  "settings.section.status": "Live Runtime Status",
-  "settings.info.plugin_name": "Plugin Name",
-  "settings.info.plugin_id": "Plugin Id",
-  "settings.info.version": "Version",
-  "settings.info.author": "Author",
-  "settings.info.description": "Description",
-  "settings.info.plugin_directory": "Plugin Directory",
-  "settings.info.data_directory": "Data Directory",
-  "settings.info.host_application": "Host Application",
-  "settings.info.host_version": "Host Version",
-  "settings.info.sdk_api_version": "SDK API Version",
-  "settings.info.state_service_resolved": "State Service Resolved",
-  "settings.info.clock_service_resolved": "Clock Service Resolved",
-  "settings.info.message_bus_resolved": "Message Bus Resolved",
-  "settings.info.component_placed": "Component Placed",
-  "settings.info.placed_count": "Placed Count",
-  "settings.info.preview_count": "Preview Count",
-  "settings.info.placement_ids": "Placement Ids",
-  "settings.info.last_component_id": "Last Component Id",
-  "settings.info.last_cell_size": "Last Cell Size",
-  "settings.info.clock_service_time": "Clock Service Time",
-  "settings.status.updated_at": "Updated: {0}",
-  "status.frontend.title": "Frontend Status",
-  "status.component.title": "Component Status",
-  "status.backend.title": "Backend Status",
-  "status.service.title": "Clock Service",
-  "status.summary.pending": "Pending",
-  "status.summary.attached": "Attached",
-  "status.summary.healthy": "Healthy",
-  "status.summary.faulted": "Faulted",
-  "status.summary.placed": "Placed",
-  "status.summary.preview": "Preview",
-  "status.frontend.detail.pending": "Waiting for a plugin UI surface to connect.",
-  "status.frontend.detail.settings_connected": "Settings page is connected to plugin services and communication.",
-  "status.frontend.detail.widget_connected": "Widget surface is connected to plugin services and communication.",
-  "status.component.detail.pending": "No component instance has been created yet.",
-  "status.component.detail.none": "No component instance is active.",
-  "status.component.detail.preview": "Preview instances: {0}; no placed desktop instance is active yet.",
-  "status.component.detail.placed": "Placed count: {0}; preview count: {1}; placements: {2}",
-  "status.backend.detail.pending": "Plugin initialization is in progress.",
-  "status.backend.detail.log_written": "Initialization log written to: {0}",
-  "status.backend.detail.log_write_failed": "Initialization log write failed: {0}",
-  "status.service.detail.pending": "Clock service is not attached yet.",
-  "status.service.detail.attached": "Clock service was attached and is waiting for the first tick.",
-  "status.service.detail.running": "Clock service is running. Current service time: {0}",
-  "status.service.detail.write_failed": "Clock state write failed: {0}",
-  "capability.manifest.title": "IPluginContext.Manifest",
-  "capability.manifest.detail": "Readable. Current plugin id: {0}; version: {1}.",
-  "capability.directories.title": "IPluginContext.PluginDirectory / DataDirectory",
-  "capability.directories.detail": "Readable. Plugin directory: {0}; data directory: {1}.",
-  "capability.properties.title": "IPluginContext.Properties",
-  "capability.properties.detail": "Readable. Host properties currently exposed: {0}.",
-  "capability.get_service.title": "IPluginContext.GetService<T>()",
-  "capability.get_service.detail": "Callable. State service resolved: {0}; clock service resolved: {1}; message bus resolved: {2}.",
-  "capability.register_service.title": "IPluginContext.RegisterService<TService>()",
-  "capability.register_service.detail": "Callable during plugin initialization. This sample plugin registers SamplePluginRuntimeStateService and SamplePluginClockService into the plugin service container.",
-  "capability.message_bus.title": "Plugin Communication Bus",
-  "capability.message_bus.detail": "This sample plugin uses IPluginMessageBus to push clock ticks and state change notifications into plugin UI surfaces.",
-  "capability.widget_context.title": "PluginDesktopComponentContext",
-  "capability.widget_context.detail": "Widgets can read ComponentId, PlacementId, CellSize, and call GetService<T>() against the same plugin service container.",
-  "widget.close_desktop.display_name": "Close Desktop",
-  "widget.close_desktop.text": "Close Desktop",
-  "widget.close_desktop.hint": "Exit LanMountainDesktop on click",
-  "widget.close_desktop.unavailable": "Host lifecycle API is unavailable",
-  "widget.close_desktop.failed": "Host rejected the exit request",
-  "widget.subtitle.preview": "Preview surface | placed: {0}",
-  "widget.subtitle.placement": "Placement {0} | placed: {1}",
-  "common.dev": "dev",
-  "common.none": "(none)",
-  "common.unknown": "(unknown)",
-  "common.true": "true",
-  "common.false": "false",
-  "common.yes": "Yes",
-  "common.no": "No"
-}

LanAirApp/samples/LanMountainDesktop.SamplePlugin/Localization/zh-CN.json

@@ -1,79 +0,0 @@
-{
-  "settings.page_title": "插件状态",
-  "plugin.name": "阑山示例插件",
-  "plugin.description": "用于验证 PluginSdk 加载、服务、通信与本地化能力的示例插件。",
-  "widget.display_name": "示例插件状态时钟",
-  "widget.category": "插件",
-  "settings.header.title": "示例插件能力检查器",
-  "settings.section.info": "插件信息",
-  "settings.section.capabilities": "可访问能力",
-  "settings.section.status": "实时运行状态",
-  "settings.info.plugin_name": "插件名称",
-  "settings.info.plugin_id": "插件 Id",
-  "settings.info.version": "版本",
-  "settings.info.author": "作者",
-  "settings.info.description": "描述",
-  "settings.info.plugin_directory": "插件目录",
-  "settings.info.data_directory": "数据目录",
-  "settings.info.host_application": "宿主应用",
-  "settings.info.host_version": "宿主版本",
-  "settings.info.sdk_api_version": "SDK API 版本",
-  "settings.info.state_service_resolved": "状态服务已解析",
-  "settings.info.clock_service_resolved": "时钟服务已解析",
-  "settings.info.message_bus_resolved": "消息总线已解析",
-  "settings.info.component_placed": "组件是否已放置",
-  "settings.info.placed_count": "已放置数量",
-  "settings.info.preview_count": "预览数量",
-  "settings.info.placement_ids": "放置位置 Id",
-  "settings.info.last_component_id": "最近组件 Id",
-  "settings.info.last_cell_size": "最近单元尺寸",
-  "settings.info.clock_service_time": "时钟服务时间",
-  "settings.status.updated_at": "更新时间：{0}",
-  "status.frontend.title": "前端状态",
-  "status.component.title": "组件状态",
-  "status.backend.title": "后端状态",
-  "status.service.title": "时钟服务",
-  "status.summary.pending": "等待中",
-  "status.summary.attached": "已挂接",
-  "status.summary.healthy": "正常",
-  "status.summary.faulted": "异常",
-  "status.summary.placed": "已放置",
-  "status.summary.preview": "预览中",
-  "status.frontend.detail.pending": "等待插件界面接入。",
-  "status.frontend.detail.settings_connected": "设置页已接入插件服务与通信。",
-  "status.frontend.detail.widget_connected": "组件界面已接入插件服务与通信。",
-  "status.component.detail.pending": "当前还没有创建组件实例。",
-  "status.component.detail.none": "当前没有活动中的组件实例。",
-  "status.component.detail.preview": "当前预览实例数量：{0}；尚未有已放置的桌面实例。",
-  "status.component.detail.placed": "已放置数量：{0}；预览数量：{1}；放置位置：{2}",
-  "status.backend.detail.pending": "插件初始化进行中。",
-  "status.backend.detail.log_written": "初始化日志已写入：{0}",
-  "status.backend.detail.log_write_failed": "初始化日志写入失败：{0}",
-  "status.service.detail.pending": "时钟服务尚未挂接。",
-  "status.service.detail.attached": "时钟服务已挂接，正在等待第一次心跳。",
-  "status.service.detail.running": "时钟服务运行中，当前服务时间：{0}",
-  "status.service.detail.write_failed": "时钟状态写入失败：{0}",
-  "capability.manifest.title": "IPluginContext.Manifest",
-  "capability.manifest.detail": "可读取。当前插件 id：{0}；版本：{1}。",
-  "capability.directories.title": "IPluginContext.PluginDirectory / DataDirectory",
-  "capability.directories.detail": "可读取。插件目录：{0}；数据目录：{1}。",
-  "capability.properties.title": "IPluginContext.Properties",
-  "capability.properties.detail": "可读取。宿主当前暴露的属性：{0}。",
-  "capability.get_service.title": "IPluginContext.GetService<T>()",
-  "capability.get_service.detail": "可调用。状态服务已解析：{0}；时钟服务已解析：{1}；消息总线已解析：{2}。",
-  "capability.register_service.title": "IPluginContext.RegisterService<TService>()",
-  "capability.register_service.detail": "可在插件初始化阶段调用。这个示例插件会把 SamplePluginRuntimeStateService 和 SamplePluginClockService 注册进插件服务容器。",
-  "capability.message_bus.title": "插件通信总线",
-  "capability.message_bus.detail": "这个示例插件通过 IPluginMessageBus 向插件 UI 推送时钟心跳和状态变化通知。",
-  "capability.widget_context.title": "PluginDesktopComponentContext",
-  "capability.widget_context.detail": "组件可以读取 ComponentId、PlacementId、CellSize，并能在同一个插件服务容器上调用 GetService<T>()。",
-  "widget.subtitle.preview": "预览界面 | 已放置：{0}",
-  "widget.subtitle.placement": "位置 {0} | 已放置：{1}",
-  "common.dev": "开发版",
-  "common.none": "（无）",
-  "common.unknown": "（未知）",
-  "common.true": "是",
-  "common.false": "否",
-  "common.yes": "是",
-  "common.no": "否"
-}

LanAirApp/samples/LanMountainDesktop.SamplePlugin/README.md

@@ -1,9 +0,0 @@
-# LanMountainDesktop.SamplePlugin
-
-## 中文
-
-这是阑山桌面的标准示例插件，用于演示插件清单、设置页、桌面组件、服务注册、本地化和 `.laapp` 打包流程。
-
-## English
-
-This is the standard sample plugin used to demonstrate manifests, settings pages, desktop components, service registration, localization, and `.laapp` packaging.

LanAirApp/samples/LanMountainDesktop.SamplePlugin/SamplePlugin.cs

@@ -1,100 +0,0 @@
-using LanMountainDesktop.PluginSdk;
-
-namespace LanMountainDesktop.SamplePlugin;
-
-[PluginEntrance]
-public sealed class SamplePlugin : PluginBase, IDisposable
-{
-    private SamplePluginRuntimeStateService? _stateService;
-    private SamplePluginClockService? _clockService;
-
-    public override void Initialize(IPluginContext context)
-    {
-        Directory.CreateDirectory(context.DataDirectory);
-        var localizer = PluginLocalizer.Create(context);
-
-        var hostName = GetHostProperty(context, PluginHostPropertyKeys.HostApplicationName, "UnknownHost");
-        var hostVersion = GetHostProperty(context, PluginHostPropertyKeys.HostVersion, "UnknownVersion");
-        var sdkApiVersion = GetHostProperty(context, PluginHostPropertyKeys.PluginSdkApiVersion, "UnknownApiVersion");
-        var messageBus = context.GetService<IPluginMessageBus>()
-            ?? throw new InvalidOperationException("Plugin message bus is not available.");
-
-        _stateService = new SamplePluginRuntimeStateService(
-            context.Manifest,
-            context.PluginDirectory,
-            context.DataDirectory,
-            hostName,
-            hostVersion,
-            sdkApiVersion,
-            messageBus,
-            localizer);
-        context.RegisterService(_stateService);
-
-        _clockService = new SamplePluginClockService(context.DataDirectory, _stateService, messageBus, localizer);
-        context.RegisterService(_clockService);
-        _stateService.AttachClockService(_clockService);
-
-        var logPath = Path.Combine(context.DataDirectory, "sample-plugin.log");
-        var initMessage =
-            $"[{DateTimeOffset.UtcNow:O}] {context.Manifest.Name} initialized in {hostName} (plugin version {context.Manifest.Version ?? "dev"}).";
-
-        try
-        {
-            File.AppendAllText(logPath, initMessage + Environment.NewLine);
-            _stateService.MarkBackendReady(localizer.Format(
-                "status.backend.detail.log_written",
-                "Initialization log written: {0}",
-                logPath));
-        }
-        catch (Exception ex)
-        {
-            _stateService.MarkBackendFaulted(localizer.Format(
-                "status.backend.detail.log_write_failed",
-                "Initialization log failed: {0}",
-                ex.Message));
-            throw;
-        }
-
-        _clockService.Start();
-
-        context.RegisterDesktopComponent(new PluginDesktopComponentRegistration(
-            "LanMountainDesktop.SamplePlugin.StatusClock",
-            localizer.GetString("widget.display_name", "Sample Plugin Status Clock"),
-            widgetContext => new SamplePluginStatusClockWidget(widgetContext),
-            iconKey: "PuzzlePiece",
-            category: localizer.GetString("widget.category", "Plugins"),
-            minWidthCells: 4,
-            minHeightCells: 4,
-            allowDesktopPlacement: true,
-            allowStatusBarPlacement: false,
-            resizeMode: PluginDesktopComponentResizeMode.Proportional,
-            cornerRadiusResolver: cellSize => Math.Clamp(cellSize * 0.34, 18, 34)));
-
-        context.RegisterDesktopComponent(new PluginDesktopComponentRegistration(
-            "LanMountainDesktop.SamplePlugin.CloseDesktop",
-            localizer.GetString("widget.close_desktop.display_name", "Close Desktop"),
-            widgetContext => new SamplePluginCloseDesktopWidget(widgetContext),
-            iconKey: "DismissCircle",
-            category: localizer.GetString("widget.category", "Plugins"),
-            minWidthCells: 2,
-            minHeightCells: 1,
-            allowDesktopPlacement: true,
-            allowStatusBarPlacement: false,
-            resizeMode: PluginDesktopComponentResizeMode.Free,
-            cornerRadiusResolver: cellSize => Math.Clamp(cellSize * 0.28, 14, 22)));
-    }
-
-    public void Dispose()
-    {
-        _clockService?.Dispose();
-        _clockService = null;
-        _stateService = null;
-    }
-
-    private static string GetHostProperty(IPluginContext context, string key, string fallback)
-    {
-        return context.TryGetProperty<string>(key, out var value) && !string.IsNullOrWhiteSpace(value)
-            ? value
-            : fallback;
-    }
-}

LanAirApp/samples/LanMountainDesktop.SamplePlugin/SamplePluginCloseDesktopWidget.cs

@@ -1,166 +0,0 @@
-using Avalonia;
-using Avalonia.Controls;
-using Avalonia.Layout;
-using Avalonia.Media;
-using LanMountainDesktop.PluginSdk;
-
-namespace LanMountainDesktop.SamplePlugin;
-
-internal sealed class SamplePluginCloseDesktopWidget : Border
-{
-    private readonly PluginLocalizer _localizer;
-    private readonly IHostApplicationLifecycle? _hostApplicationLifecycle;
-    private readonly TextBlock _titleTextBlock;
-    private readonly TextBlock _statusTextBlock;
-
-    public SamplePluginCloseDesktopWidget(PluginDesktopComponentContext context)
-    {
-        _localizer = PluginLocalizer.Create(context);
-        _hostApplicationLifecycle = context.GetService<IHostApplicationLifecycle>();
-
-        _titleTextBlock = new TextBlock
-        {
-            Text = T("widget.close_desktop.text", "关闭桌面"),
-            Foreground = Brushes.White,
-            FontWeight = FontWeight.SemiBold,
-            VerticalAlignment = VerticalAlignment.Center
-        };
-
-        _statusTextBlock = new TextBlock
-        {
-            Text = _hostApplicationLifecycle is null
-                ? T("widget.close_desktop.unavailable", "宿主未提供退出接口")
-                : T("widget.close_desktop.hint", "点击后退出阑山桌面"),
-            Foreground = new SolidColorBrush(Color.Parse("#FFD4E7F6")),
-            VerticalAlignment = VerticalAlignment.Center
-        };
-
-        var contentGrid = new Grid
-        {
-            ColumnDefinitions = new ColumnDefinitions("Auto,*"),
-            ColumnSpacing = 14,
-            VerticalAlignment = VerticalAlignment.Center,
-            Children =
-            {
-                CreateIconShell(),
-                new StackPanel
-                {
-                    Spacing = 2,
-                    VerticalAlignment = VerticalAlignment.Center,
-                    Children =
-                    {
-                        _titleTextBlock,
-                        _statusTextBlock
-                    }
-                }
-            }
-        };
-
-        Grid.SetColumn(contentGrid.Children[1], 1);
-
-        var actionButton = new Button
-        {
-            HorizontalAlignment = HorizontalAlignment.Stretch,
-            VerticalAlignment = VerticalAlignment.Stretch,
-            HorizontalContentAlignment = HorizontalAlignment.Stretch,
-            VerticalContentAlignment = VerticalAlignment.Stretch,
-            Background = Brushes.Transparent,
-            BorderThickness = new Thickness(0),
-            Padding = new Thickness(0),
-            IsEnabled = _hostApplicationLifecycle is not null,
-            Content = contentGrid
-        };
-        actionButton.Click += OnButtonClick;
-
-        Background = new LinearGradientBrush
-        {
-            StartPoint = new RelativePoint(0, 0, RelativeUnit.Relative),
-            EndPoint = new RelativePoint(1, 1, RelativeUnit.Relative),
-            GradientStops =
-            [
-                new GradientStop(Color.Parse("#FF0B1220"), 0),
-                new GradientStop(Color.Parse("#FF172554"), 0.55),
-                new GradientStop(Color.Parse("#FF7F1D1D"), 1)
-            ]
-        };
-        BorderBrush = new SolidColorBrush(Color.Parse("#66FB7185"));
-        BorderThickness = new Thickness(1);
-        CornerRadius = new CornerRadius(18);
-        Padding = new Thickness(14, 10);
-        Child = actionButton;
-
-        SizeChanged += OnSizeChanged;
-        ApplyScale();
-    }
-
-    private Border CreateIconShell()
-    {
-        return new Border
-        {
-            Width = 36,
-            Height = 36,
-            CornerRadius = new CornerRadius(999),
-            Background = new SolidColorBrush(Color.Parse("#33F87171")),
-            BorderBrush = new SolidColorBrush(Color.Parse("#88FCA5A5")),
-            BorderThickness = new Thickness(1),
-            VerticalAlignment = VerticalAlignment.Center,
-            Child = new TextBlock
-            {
-                Text = "⏻",
-                FontSize = 18,
-                Foreground = Brushes.White,
-                HorizontalAlignment = HorizontalAlignment.Center,
-                VerticalAlignment = VerticalAlignment.Center,
-                TextAlignment = TextAlignment.Center
-            }
-        };
-    }
-
-    private void OnButtonClick(object? sender, Avalonia.Interactivity.RoutedEventArgs e)
-    {
-        if (_hostApplicationLifecycle?.TryExit(new HostApplicationLifecycleRequest(
-                Source: "SamplePlugin.CloseDesktopWidget",
-                Reason: "User invoked the sample plugin close-desktop widget.")) == true)
-        {
-            return;
-        }
-
-        _statusTextBlock.Text = T("widget.close_desktop.failed", "宿主未接受退出请求");
-    }
-
-    private void OnSizeChanged(object? sender, SizeChangedEventArgs e)
-    {
-        ApplyScale();
-    }
-
-    private void ApplyScale()
-    {
-        var basis = Bounds.Height > 1 ? Bounds.Height : 72;
-        Padding = new Thickness(Math.Clamp(basis * 0.18, 12, 18), Math.Clamp(basis * 0.14, 8, 14));
-        CornerRadius = new CornerRadius(Math.Clamp(basis * 0.32, 16, 24));
-
-        if (Child is not Button actionButton || actionButton.Content is not Grid contentGrid)
-        {
-            return;
-        }
-
-        if (contentGrid.Children[0] is Border iconShell)
-        {
-            var iconSize = Math.Clamp(basis * 0.58, 28, 40);
-            iconShell.Width = iconSize;
-            iconShell.Height = iconSize;
-            if (iconShell.Child is TextBlock iconText)
-            {
-                iconText.FontSize = Math.Clamp(iconSize * 0.5, 14, 20);
-            }
-        }
-
-        _titleTextBlock.FontSize = Math.Clamp(basis * 0.28, 14, 20);
-        _statusTextBlock.FontSize = Math.Clamp(basis * 0.18, 10, 13);
-    }
-
-    private string T(string key, string fallback)
-    {
-        return _localizer.GetString(key, fallback);
-    }
-}

LanAirApp/samples/LanMountainDesktop.SamplePlugin/SamplePluginRuntimeStatus.cs

@@ -1,524 +0,0 @@
-using System.Globalization;
-using System.IO;
-using System.Linq;
-using System.Threading;
-using LanMountainDesktop.PluginSdk;
-
-namespace LanMountainDesktop.SamplePlugin;
-
-internal enum SamplePluginHealthState
-{
-    Healthy,
-    Pending,
-    Faulted
-}
-
-internal sealed record SamplePluginStatusEntry(
-    string Key,
-    string Title,
-    SamplePluginHealthState State,
-    string Summary,
-    string Detail,
-    DateTimeOffset UpdatedAt);
-
-internal sealed record SamplePluginCapabilityItem(
-    string Title,
-    string Detail);
-
-internal sealed record SamplePluginRuntimeSnapshot(
-    PluginManifest Manifest,
-    string PluginDirectory,
-    string DataDirectory,
-    string HostApplicationName,
-    string HostVersion,
-    string SdkApiVersion,
-    IReadOnlyList<SamplePluginStatusEntry> StatusEntries,
-    bool HasPlacedComponent,
-    int PlacedCount,
-    int PreviewCount,
-    IReadOnlyList<string> PlacementIds,
-    string? LastComponentId,
-    double LastCellSize,
-    DateTimeOffset? ServiceClockTime);
-
-internal sealed record SamplePluginClockTickMessage(DateTimeOffset CurrentTime);
-
-internal sealed record SamplePluginStateChangedMessage(string Reason);
-
-internal sealed record SamplePluginComponentInstance(
-    string ComponentId,
-    string? PlacementId,
-    double CellSize)
-{
-    public bool IsPlaced => !string.IsNullOrWhiteSpace(PlacementId);
-}
-
-internal sealed class SamplePluginRuntimeStateService
-{
-    private readonly object _gate = new();
-    private readonly IPluginMessageBus _messageBus;
-    private readonly Dictionary<string, SamplePluginComponentInstance> _componentInstances =
-        new(StringComparer.OrdinalIgnoreCase);
-
-    private readonly PluginManifest _manifest;
-    private readonly string _pluginDirectory;
-    private readonly string _dataDirectory;
-    private readonly string _hostApplicationName;
-    private readonly string _hostVersion;
-    private readonly string _sdkApiVersion;
-    private readonly PluginLocalizer _localizer;
-
-    private SamplePluginStatusEntry _frontend;
-    private SamplePluginStatusEntry _component;
-    private SamplePluginStatusEntry _backend;
-    private SamplePluginStatusEntry _service;
-    private string? _lastComponentId;
-    private double _lastCellSize;
-    private DateTimeOffset? _serviceClockTime;
-
-    public SamplePluginRuntimeStateService(
-        PluginManifest manifest,
-        string pluginDirectory,
-        string dataDirectory,
-        string hostApplicationName,
-        string hostVersion,
-        string sdkApiVersion,
-        IPluginMessageBus messageBus,
-        PluginLocalizer localizer)
-    {
-        _manifest = manifest;
-        _pluginDirectory = pluginDirectory;
-        _dataDirectory = dataDirectory;
-        _hostApplicationName = hostApplicationName;
-        _hostVersion = hostVersion;
-        _sdkApiVersion = sdkApiVersion;
-        _messageBus = messageBus;
-        _localizer = localizer;
-
-        _frontend = CreateEntry(
-            "frontend",
-            T("status.frontend.title", "前端状态"),
-            SamplePluginHealthState.Pending,
-            T("status.summary.pending", "等待中"),
-            T("status.frontend.detail.pending", "等待插件界面接入。"));
-
-        _component = CreateEntry(
-            "component",
-            T("status.component.title", "组件状态"),
-            SamplePluginHealthState.Pending,
-            T("status.summary.pending", "等待中"),
-            T("status.component.detail.pending", "当前还没有创建组件实例。"));
-
-        _backend = CreateEntry(
-            "backend",
-            T("status.backend.title", "后端状态"),
-            SamplePluginHealthState.Pending,
-            T("status.summary.pending", "等待中"),
-            T("status.backend.detail.pending", "插件初始化进行中。"));
-
-        _service = CreateEntry(
-            "service",
-            T("status.service.title", "时钟服务"),
-            SamplePluginHealthState.Pending,
-            T("status.summary.pending", "等待中"),
-            T("status.service.detail.pending", "时钟服务尚未挂接。"));
-    }
-
-    public void AttachClockService(SamplePluginClockService clockService)
-    {
-        ArgumentNullException.ThrowIfNull(clockService);
-
-        lock (_gate)
-        {
-            _serviceClockTime = clockService.CurrentTime;
-            _service = CreateEntry(
-                "service",
-                T("status.service.title", "时钟服务"),
-                SamplePluginHealthState.Pending,
-                T("status.summary.attached", "已挂接"),
-                T("status.service.detail.attached", "时钟服务已挂接，正在等待第一次心跳。"));
-        }
-
-        PublishStateChanged("Clock service attached");
-    }
-
-    public void MarkFrontendReady(string detail)
-    {
-        lock (_gate)
-        {
-            _frontend = CreateEntry(
-                "frontend",
-                T("status.frontend.title", "前端状态"),
-                SamplePluginHealthState.Healthy,
-                T("status.summary.healthy", "正常"),
-                detail);
-        }
-
-        PublishStateChanged("Frontend updated");
-    }
-
-    public void MarkBackendReady(string detail)
-    {
-        lock (_gate)
-        {
-            _backend = CreateEntry(
-                "backend",
-                T("status.backend.title", "后端状态"),
-                SamplePluginHealthState.Healthy,
-                T("status.summary.healthy", "正常"),
-                detail);
-        }
-
-        PublishStateChanged("Backend updated");
-    }
-
-    public void MarkBackendFaulted(string detail)
-    {
-        lock (_gate)
-        {
-            _backend = CreateEntry(
-                "backend",
-                T("status.backend.title", "后端状态"),
-                SamplePluginHealthState.Faulted,
-                T("status.summary.faulted", "异常"),
-                detail);
-        }
-
-        PublishStateChanged("Backend faulted");
-    }
-
-    public void MarkClockServiceTick(DateTimeOffset currentTime)
-    {
-        lock (_gate)
-        {
-            _serviceClockTime = currentTime;
-            _service = CreateEntry(
-                "service",
-                T("status.service.title", "时钟服务"),
-                SamplePluginHealthState.Healthy,
-                T("status.summary.healthy", "正常"),
-                Tf(
-                    "status.service.detail.running",
-                    "时钟服务运行中，当前服务时间：{0}",
-                    currentTime.LocalDateTime.ToString("HH:mm:ss")));
-        }
-
-        PublishStateChanged("Clock service tick");
-    }
-
-    public void MarkClockServiceFaulted(string detail)
-    {
-        lock (_gate)
-        {
-            _service = CreateEntry(
-                "service",
-                T("status.service.title", "时钟服务"),
-                SamplePluginHealthState.Faulted,
-                T("status.summary.faulted", "异常"),
-                detail);
-        }
-
-        PublishStateChanged("Clock service faulted");
-    }
-
-    public string RegisterComponentInstance(string componentId, string? placementId, double cellSize)
-    {
-        var instanceId = Guid.NewGuid().ToString("N");
-
-        lock (_gate)
-        {
-            _componentInstances[instanceId] = new SamplePluginComponentInstance(componentId, placementId, cellSize);
-            _lastComponentId = componentId;
-            _lastCellSize = cellSize;
-            UpdateComponentStatusNoLock();
-        }
-
-        PublishStateChanged("Component attached");
-        return instanceId;
-    }
-
-    public void UnregisterComponentInstance(string instanceId)
-    {
-        ArgumentException.ThrowIfNullOrWhiteSpace(instanceId);
-
-        var removed = false;
-        lock (_gate)
-        {
-            removed = _componentInstances.Remove(instanceId);
-            if (removed)
-            {
-                UpdateComponentStatusNoLock();
-            }
-        }
-
-        if (removed)
-        {
-            PublishStateChanged("Component detached");
-        }
-    }
-
-    public SamplePluginRuntimeSnapshot GetSnapshot()
-    {
-        lock (_gate)
-        {
-            var placementIds = _componentInstances.Values
-                .Where(instance => instance.IsPlaced)
-                .Select(instance => instance.PlacementId!)
-                .Distinct(StringComparer.OrdinalIgnoreCase)
-                .OrderBy(id => id, StringComparer.OrdinalIgnoreCase)
-                .ToArray();
-
-            var previewCount = _componentInstances.Values.Count(instance => !instance.IsPlaced);
-
-            return new SamplePluginRuntimeSnapshot(
-                _manifest,
-                _pluginDirectory,
-                _dataDirectory,
-                _hostApplicationName,
-                _hostVersion,
-                _sdkApiVersion,
-                [_frontend, _component, _backend, _service],
-                placementIds.Length > 0,
-                placementIds.Length,
-                previewCount,
-                placementIds,
-                _lastComponentId,
-                _lastCellSize,
-                _serviceClockTime);
-        }
-    }
-
-    public IReadOnlyList<SamplePluginCapabilityItem> GetCapabilities(
-        IPluginContext context,
-        bool hasStateService,
-        bool hasClockService,
-        bool hasMessageBus)
-    {
-        ArgumentNullException.ThrowIfNull(context);
-
-        var propertyNames = context.Properties.Count == 0
-            ? T("common.none", "（无）")
-            : string.Join(", ", context.Properties.Keys.OrderBy(key => key, StringComparer.OrdinalIgnoreCase));
-
-        return
-        [
-            new SamplePluginCapabilityItem(
-                T("capability.manifest.title", "IPluginContext.Manifest"),
-                Tf(
-                    "capability.manifest.detail",
-                    "可读取。当前插件 id：{0}；版本：{1}。",
-                    context.Manifest.Id,
-                    context.Manifest.Version ?? T("common.dev", "开发版"))),
-            new SamplePluginCapabilityItem(
-                T("capability.directories.title", "IPluginContext.PluginDirectory / DataDirectory"),
-                Tf(
-                    "capability.directories.detail",
-                    "可读取。插件目录：{0}；数据目录：{1}。",
-                    context.PluginDirectory,
-                    context.DataDirectory)),
-            new SamplePluginCapabilityItem(
-                T("capability.properties.title", "IPluginContext.Properties"),
-                Tf(
-                    "capability.properties.detail",
-                    "可读取。宿主当前暴露的属性：{0}。",
-                    propertyNames)),
-            new SamplePluginCapabilityItem(
-                T("capability.get_service.title", "IPluginContext.GetService<T>()"),
-                Tf(
-                    "capability.get_service.detail",
-                    "可调用。状态服务已解析：{0}；时钟服务已解析：{1}；消息总线已解析：{2}。",
-                    FormatBoolean(hasStateService),
-                    FormatBoolean(hasClockService),
-                    FormatBoolean(hasMessageBus))),
-            new SamplePluginCapabilityItem(
-                T("capability.register_service.title", "IPluginContext.RegisterService<TService>()"),
-                T(
-                    "capability.register_service.detail",
-                    "可在插件初始化阶段调用。这个示例插件会把 SamplePluginRuntimeStateService 和 SamplePluginClockService 注册进插件服务容器。")),
-            new SamplePluginCapabilityItem(
-                T("capability.message_bus.title", "插件通信总线"),
-                T(
-                    "capability.message_bus.detail",
-                    "这个示例插件通过 IPluginMessageBus 向插件 UI 推送时钟心跳和状态变化通知。")),
-            new SamplePluginCapabilityItem(
-                T("capability.widget_context.title", "PluginDesktopComponentContext"),
-                T(
-                    "capability.widget_context.detail",
-                    "组件可以读取 ComponentId、PlacementId、CellSize，并能在同一个插件服务容器上调用 GetService<T>()。"))
-        ];
-    }
-
-    private void UpdateComponentStatusNoLock()
-    {
-        var placementIds = _componentInstances.Values
-            .Where(instance => instance.IsPlaced)
-            .Select(instance => instance.PlacementId!)
-            .Distinct(StringComparer.OrdinalIgnoreCase)
-            .OrderBy(id => id, StringComparer.OrdinalIgnoreCase)
-            .ToArray();
-
-        var previewCount = _componentInstances.Values.Count(instance => !instance.IsPlaced);
-
-        if (placementIds.Length > 0)
-        {
-            _component = CreateEntry(
-                "component",
-                T("status.component.title", "组件状态"),
-                SamplePluginHealthState.Healthy,
-                T("status.summary.placed", "已放置"),
-                Tf(
-                    "status.component.detail.placed",
-                    "已放置数量：{0}；预览数量：{1}；放置位置：{2}",
-                    placementIds.Length,
-                    previewCount,
-                    string.Join(", ", placementIds)));
-            return;
-        }
-
-        if (previewCount > 0)
-        {
-            _component = CreateEntry(
-                "component",
-                T("status.component.title", "组件状态"),
-                SamplePluginHealthState.Healthy,
-                T("status.summary.preview", "预览中"),
-                Tf(
-                    "status.component.detail.preview",
-                    "当前预览实例数量：{0}；尚未有已放置的桌面实例。",
-                    previewCount));
-            return;
-        }
-
-        _component = CreateEntry(
-            "component",
-            T("status.component.title", "组件状态"),
-            SamplePluginHealthState.Pending,
-            T("status.summary.pending", "等待中"),
-            T("status.component.detail.none", "当前没有活动中的组件实例。"));
-    }
-
-    private void PublishStateChanged(string reason)
-    {
-        _messageBus.Publish(new SamplePluginStateChangedMessage(reason));
-    }
-
-    private static SamplePluginStatusEntry CreateEntry(
-        string key,
-        string title,
-        SamplePluginHealthState state,
-        string summary,
-        string detail)
-    {
-        return new SamplePluginStatusEntry(
-            key,
-            title,
-            state,
-            summary,
-            detail,
-            DateTimeOffset.Now);
-    }
-
-    private string T(string key, string fallback)
-    {
-        return _localizer.GetString(key, fallback);
-    }
-
-    private string Tf(string key, string fallback, params object[] args)
-    {
-        return _localizer.Format(key, fallback, args);
-    }
-
-    private string FormatBoolean(bool value)
-    {
-        return value
-            ? T("common.true", "是")
-            : T("common.false", "否");
-    }
-}
-
-internal sealed class SamplePluginClockService : IDisposable
-{
-    private readonly object _gate = new();
-    private readonly string _clockStateFilePath;
-    private readonly SamplePluginRuntimeStateService _stateService;
-    private readonly IPluginMessageBus _messageBus;
-    private readonly PluginLocalizer _localizer;
-    private readonly Timer _timer;
-    private DateTimeOffset _currentTime = DateTimeOffset.Now;
-    private int _disposed;
-
-    public SamplePluginClockService(
-        string dataDirectory,
-        SamplePluginRuntimeStateService stateService,
-        IPluginMessageBus messageBus,
-        PluginLocalizer localizer)
-    {
-        _clockStateFilePath = Path.Combine(dataDirectory, "clock-service.txt");
-        _stateService = stateService;
-        _messageBus = messageBus;
-        _localizer = localizer;
-        _timer = new Timer(OnTimerTick);
-    }
-
-    public DateTimeOffset CurrentTime
-    {
-        get
-        {
-            lock (_gate)
-            {
-                return _currentTime;
-            }
-        }
-    }
-
-    public void Start()
-    {
-        PublishTick();
-        _timer.Change(TimeSpan.FromSeconds(1), TimeSpan.FromSeconds(1));
-    }
-
-    public void Dispose()
-    {
-        if (Interlocked.Exchange(ref _disposed, 1) != 0)
-        {
-            return;
-        }
-
-        _timer.Dispose();
-    }
-
-    private void OnTimerTick(object? state)
-    {
-        PublishTick();
-    }
-
-    private void PublishTick()
-    {
-        if (Volatile.Read(ref _disposed) != 0)
-        {
-            return;
-        }
-
-        var now = DateTimeOffset.Now;
-        lock (_gate)
-        {
-            _currentTime = now;
-        }
-
-        try
-        {
-            File.WriteAllText(
-                _clockStateFilePath,
-                now.ToString("O", CultureInfo.InvariantCulture));
-            _stateService.MarkClockServiceTick(now);
-            _messageBus.Publish(new SamplePluginClockTickMessage(now));
-        }
-        catch (Exception ex)
-        {
-            _stateService.MarkClockServiceFaulted(_localizer.Format(
-                "status.service.detail.write_failed",
-                "时钟状态写入失败：{0}",
-                ex.Message));
-        }
-    }
-}

LanAirApp/samples/LanMountainDesktop.SamplePlugin/SamplePluginSettingsView.cs

@@ -1,374 +0,0 @@
-using Avalonia;
-using Avalonia.Controls;
-using Avalonia.Layout;
-using Avalonia.Media;
-using Avalonia.Threading;
-using LanMountainDesktop.PluginSdk;
-
-namespace LanMountainDesktop.SamplePlugin;
-
-internal sealed class SamplePluginSettingsView : UserControl
-{
-    private readonly IPluginContext _context;
-    private readonly PluginLocalizer _localizer;
-    private readonly SamplePluginRuntimeStateService _stateService;
-    private readonly SamplePluginClockService _clockService;
-    private readonly IPluginMessageBus _messageBus;
-    private readonly StackPanel _pluginInfoPanel = new() { Spacing = 8 };
-    private readonly StackPanel _capabilityPanel = new() { Spacing = 8 };
-    private readonly StackPanel _statusPanel = new() { Spacing = 10 };
-    private readonly List<IDisposable> _subscriptions = [];
-
-    public SamplePluginSettingsView(IPluginContext context)
-    {
-        _context = context;
-        _localizer = PluginLocalizer.Create(context);
-        _stateService = context.GetService<SamplePluginRuntimeStateService>()
-            ?? throw new InvalidOperationException("SamplePluginRuntimeStateService is not available.");
-        _clockService = context.GetService<SamplePluginClockService>()
-            ?? throw new InvalidOperationException("SamplePluginClockService is not available.");
-        _messageBus = context.GetService<IPluginMessageBus>()
-            ?? throw new InvalidOperationException("IPluginMessageBus is not available.");
-
-        _stateService.MarkFrontendReady(T(
-            "status.frontend.detail.settings_connected",
-            "设置页已接入插件服务与通信。"));
-
-        AttachedToVisualTree += OnAttachedToVisualTree;
-        DetachedFromVisualTree += OnDetachedFromVisualTree;
-
-        Content = new Border
-        {
-            Background = new LinearGradientBrush
-            {
-                StartPoint = new RelativePoint(0, 0, RelativeUnit.Relative),
-                EndPoint = new RelativePoint(1, 1, RelativeUnit.Relative),
-                GradientStops =
-                [
-                    new GradientStop(Color.Parse("#1F0B1120"), 0),
-                    new GradientStop(Color.Parse("#260C4A6E"), 1)
-                ]
-            },
-            BorderBrush = new SolidColorBrush(Color.Parse("#6628B2FF")),
-            BorderThickness = new Thickness(1),
-            CornerRadius = new CornerRadius(18),
-            Padding = new Thickness(18),
-            Child = new StackPanel
-            {
-                Spacing = 14,
-                Children =
-                {
-                    new TextBlock
-                    {
-                        Text = T("settings.header.title", "示例插件能力检查器"),
-                        FontSize = 22,
-                        FontWeight = FontWeight.SemiBold,
-                        Foreground = Brushes.White
-                    },
-                    CreateSection(T("settings.section.info", "插件信息"), _pluginInfoPanel),
-                    CreateSection(T("settings.section.capabilities", "可访问能力"), _capabilityPanel),
-                    CreateSection(T("settings.section.status", "实时运行状态"), _statusPanel)
-                }
-            }
-        };
-
-        RefreshView();
-    }
-
-    private void OnAttachedToVisualTree(object? sender, VisualTreeAttachmentEventArgs e)
-    {
-        SubscribeToPluginBus();
-        RefreshView();
-    }
-
-    private void OnDetachedFromVisualTree(object? sender, VisualTreeAttachmentEventArgs e)
-    {
-        foreach (var subscription in _subscriptions)
-        {
-            subscription.Dispose();
-        }
-
-        _subscriptions.Clear();
-    }
-
-    private void SubscribeToPluginBus()
-    {
-        if (_subscriptions.Count > 0)
-        {
-            return;
-        }
-
-        _subscriptions.Add(_messageBus.Subscribe<SamplePluginClockTickMessage>(_ =>
-            Dispatcher.UIThread.Post(RefreshView)));
-
-        _subscriptions.Add(_messageBus.Subscribe<SamplePluginStateChangedMessage>(_ =>
-            Dispatcher.UIThread.Post(RefreshView)));
-    }
-
-    private void RefreshView()
-    {
-        var snapshot = _stateService.GetSnapshot();
-        RefreshPluginInfo(snapshot);
-        RefreshCapabilities();
-        RefreshStatuses(snapshot);
-    }
-
-    private void RefreshPluginInfo(SamplePluginRuntimeSnapshot snapshot)
-    {
-        _pluginInfoPanel.Children.Clear();
-        _pluginInfoPanel.Children.Add(CreateInfoLine(
-            T("settings.info.plugin_name", "插件名称"),
-            T("plugin.name", snapshot.Manifest.Name)));
-        _pluginInfoPanel.Children.Add(CreateInfoLine(T("settings.info.plugin_id", "插件 Id"), snapshot.Manifest.Id));
-        _pluginInfoPanel.Children.Add(CreateInfoLine(T("settings.info.version", "版本"), snapshot.Manifest.Version ?? T("common.dev", "开发版")));
-        _pluginInfoPanel.Children.Add(CreateInfoLine(T("settings.info.author", "作者"), snapshot.Manifest.Author ?? T("common.none", "（无）")));
-        _pluginInfoPanel.Children.Add(CreateInfoLine(
-            T("settings.info.description", "描述"),
-            T("plugin.description", snapshot.Manifest.Description ?? T("common.none", "（无）"))));
-        _pluginInfoPanel.Children.Add(CreateInfoLine(T("settings.info.plugin_directory", "插件目录"), snapshot.PluginDirectory));
-        _pluginInfoPanel.Children.Add(CreateInfoLine(T("settings.info.data_directory", "数据目录"), snapshot.DataDirectory));
-        _pluginInfoPanel.Children.Add(CreateInfoLine(T("settings.info.host_application", "宿主应用"), snapshot.HostApplicationName));
-        _pluginInfoPanel.Children.Add(CreateInfoLine(T("settings.info.host_version", "宿主版本"), snapshot.HostVersion));
-        _pluginInfoPanel.Children.Add(CreateInfoLine(T("settings.info.sdk_api_version", "SDK API 版本"), snapshot.SdkApiVersion));
-        _pluginInfoPanel.Children.Add(CreateInfoLine(
-            T("settings.info.state_service_resolved", "状态服务已解析"),
-            FormatBoolean(_context.GetService<SamplePluginRuntimeStateService>() is not null)));
-        _pluginInfoPanel.Children.Add(CreateInfoLine(
-            T("settings.info.clock_service_resolved", "时钟服务已解析"),
-            FormatBoolean(_context.GetService<SamplePluginClockService>() is not null)));
-        _pluginInfoPanel.Children.Add(CreateInfoLine(
-            T("settings.info.message_bus_resolved", "消息总线已解析"),
-            FormatBoolean(_context.GetService<IPluginMessageBus>() is not null)));
-        _pluginInfoPanel.Children.Add(CreateInfoLine(
-            T("settings.info.component_placed", "组件是否已放置"),
-            snapshot.HasPlacedComponent ? T("common.yes", "是") : T("common.no", "否")));
-        _pluginInfoPanel.Children.Add(CreateInfoLine(T("settings.info.placed_count", "已放置数量"), snapshot.PlacedCount.ToString()));
-        _pluginInfoPanel.Children.Add(CreateInfoLine(T("settings.info.preview_count", "预览数量"), snapshot.PreviewCount.ToString()));
-        _pluginInfoPanel.Children.Add(CreateInfoLine(
-            T("settings.info.placement_ids", "放置位置 Id"),
-            snapshot.PlacementIds.Count == 0 ? T("common.none", "（无）") : string.Join(", ", snapshot.PlacementIds)));
-        _pluginInfoPanel.Children.Add(CreateInfoLine(
-            T("settings.info.last_component_id", "最近组件 Id"),
-            snapshot.LastComponentId ?? T("common.none", "（无）")));
-        _pluginInfoPanel.Children.Add(CreateInfoLine(
-            T("settings.info.last_cell_size", "最近单元尺寸"),
-            snapshot.LastCellSize > 0 ? $"{snapshot.LastCellSize:F0}px" : T("common.unknown", "（未知）")));
-        _pluginInfoPanel.Children.Add(CreateInfoLine(
-            T("settings.info.clock_service_time", "时钟服务时间"),
-            _clockService.CurrentTime.LocalDateTime.ToString("HH:mm:ss")));
-    }
-
-    private void RefreshCapabilities()
-    {
-        var capabilities = _stateService.GetCapabilities(
-            _context,
-            _context.GetService<SamplePluginRuntimeStateService>() is not null,
-            _context.GetService<SamplePluginClockService>() is not null,
-            _context.GetService<IPluginMessageBus>() is not null);
-
-        _capabilityPanel.Children.Clear();
-        foreach (var capability in capabilities)
-        {
-            _capabilityPanel.Children.Add(CreateCapabilityCard(capability));
-        }
-    }
-
-    private void RefreshStatuses(SamplePluginRuntimeSnapshot snapshot)
-    {
-        _statusPanel.Children.Clear();
-
-        foreach (var entry in snapshot.StatusEntries)
-        {
-            var palette = GetPalette(entry.State);
-            _statusPanel.Children.Add(new Border
-            {
-                Background = new SolidColorBrush(palette.Background),
-                BorderBrush = new SolidColorBrush(palette.Border),
-                BorderThickness = new Thickness(1),
-                CornerRadius = new CornerRadius(12),
-                Padding = new Thickness(12, 10),
-                Child = new StackPanel
-                {
-                    Spacing = 4,
-                    Children =
-                    {
-                        CreateStatusHeader(entry, palette),
-                        new TextBlock
-                        {
-                            Text = entry.Detail,
-                            Foreground = new SolidColorBrush(Color.Parse("#FFE0F2FE")),
-                            TextWrapping = TextWrapping.Wrap
-                        },
-                        new TextBlock
-                        {
-                            Text = Tf("settings.status.updated_at", "更新时间：{0}", entry.UpdatedAt.LocalDateTime.ToString("HH:mm:ss")),
-                            Foreground = new SolidColorBrush(Color.Parse("#FF93C5FD"))
-                        }
-                    }
-                }
-            });
-        }
-    }
-
-    private Border CreateSection(string title, Control content)
-    {
-        return new Border
-        {
-            Background = new SolidColorBrush(Color.Parse("#14000000")),
-            BorderBrush = new SolidColorBrush(Color.Parse("#3328B2FF")),
-            BorderThickness = new Thickness(1),
-            CornerRadius = new CornerRadius(14),
-            Padding = new Thickness(14),
-            Child = new StackPanel
-            {
-                Spacing = 12,
-                Children =
-                {
-                    new TextBlock
-                    {
-                        Text = title,
-                        FontSize = 16,
-                        FontWeight = FontWeight.SemiBold,
-                        Foreground = Brushes.White
-                    },
-                    content
-                }
-            }
-        };
-    }
-
-    private Control CreateInfoLine(string label, string value)
-    {
-        var grid = new Grid
-        {
-            ColumnDefinitions = new ColumnDefinitions("180,*"),
-            ColumnSpacing = 10
-        };
-
-        var labelText = new TextBlock
-        {
-            Text = label,
-            Foreground = new SolidColorBrush(Color.Parse("#FFBAE6FD")),
-            FontWeight = FontWeight.SemiBold,
-            TextWrapping = TextWrapping.Wrap
-        };
-        var valueText = new TextBlock
-        {
-            Text = value,
-            Foreground = Brushes.White,
-            TextWrapping = TextWrapping.Wrap
-        };
-
-        grid.Children.Add(labelText);
-        grid.Children.Add(valueText);
-        Grid.SetColumn(valueText, 1);
-        return grid;
-    }
-
-    private Control CreateCapabilityCard(SamplePluginCapabilityItem item)
-    {
-        return new Border
-        {
-            Background = new SolidColorBrush(Color.Parse("#0F082F49")),
-            BorderBrush = new SolidColorBrush(Color.Parse("#3338BDF8")),
-            BorderThickness = new Thickness(1),
-            CornerRadius = new CornerRadius(12),
-            Padding = new Thickness(12, 10),
-            Child = new StackPanel
-            {
-                Spacing = 4,
-                Children =
-                {
-                    new TextBlock
-                    {
-                        Text = item.Title,
-                        Foreground = Brushes.White,
-                        FontWeight = FontWeight.SemiBold
-                    },
-                    new TextBlock
-                    {
-                        Text = item.Detail,
-                        Foreground = new SolidColorBrush(Color.Parse("#FFE0F2FE")),
-                        TextWrapping = TextWrapping.Wrap
-                    }
-                }
-            }
-        };
-    }
-
-    private static Control CreateStatusHeader(
-        SamplePluginStatusEntry entry,
-        (Color Background, Color Border, Color Dot) palette)
-    {
-        var grid = new Grid
-        {
-            ColumnDefinitions = new ColumnDefinitions("Auto,*,Auto"),
-            ColumnSpacing = 8
-        };
-
-        var dot = new Border
-        {
-            Width = 10,
-            Height = 10,
-            CornerRadius = new CornerRadius(999),
-            Background = new SolidColorBrush(palette.Dot),
-            VerticalAlignment = VerticalAlignment.Center
-        };
-        var title = new TextBlock
-        {
-            Text = entry.Title,
-            FontSize = 15,
-            FontWeight = FontWeight.SemiBold,
-            Foreground = Brushes.White
-        };
-        var summary = new TextBlock
-        {
-            Text = entry.Summary,
-            Foreground = new SolidColorBrush(Color.Parse("#FFD7F2FF")),
-            HorizontalAlignment = HorizontalAlignment.Right
-        };
-
-        grid.Children.Add(dot);
-        grid.Children.Add(title);
-        grid.Children.Add(summary);
-        Grid.SetColumn(title, 1);
-        Grid.SetColumn(summary, 2);
-        return grid;
-    }
-
-    private static (Color Background, Color Border, Color Dot) GetPalette(SamplePluginHealthState state)
-    {
-        return state switch
-        {
-            SamplePluginHealthState.Healthy => (
-                Color.Parse("#1F115E59"),
-                Color.Parse("#665EEAD4"),
-                Color.Parse("#5EEAD4")),
-            SamplePluginHealthState.Faulted => (
-                Color.Parse("#291B1B"),
-                Color.Parse("#66F87171"),
-                Color.Parse("#F87171")),
-            _ => (
-                Color.Parse("#2B3A2A0D"),
-                Color.Parse("#66FBBF24"),
-                Color.Parse("#FBBF24"))
-        };
-    }
-
-    private string T(string key, string fallback)
-    {
-        return _localizer.GetString(key, fallback);
-    }
-
-    private string Tf(string key, string fallback, params object[] args)
-    {
-        return _localizer.Format(key, fallback, args);
-    }
-
-    private string FormatBoolean(bool value)
-    {
-        return value
-            ? T("common.true", "是")
-            : T("common.false", "否");
-    }
-}

LanAirApp/samples/LanMountainDesktop.SamplePlugin/SamplePluginStatusClockWidget.cs

@@ -1,298 +0,0 @@
-using Avalonia;
-using Avalonia.Controls;
-using Avalonia.Layout;
-using Avalonia.Media;
-using Avalonia.Threading;
-using LanMountainDesktop.PluginSdk;
-
-namespace LanMountainDesktop.SamplePlugin;
-
-internal sealed class SamplePluginStatusClockWidget : Border
-{
-    private readonly PluginDesktopComponentContext _context;
-    private readonly PluginLocalizer _localizer;
-    private readonly SamplePluginRuntimeStateService _stateService;
-    private readonly SamplePluginClockService _clockService;
-    private readonly IPluginMessageBus _messageBus;
-    private readonly TextBlock _timeTextBlock;
-    private readonly TextBlock _subtitleTextBlock;
-    private readonly StackPanel _statusPanel;
-    private readonly Border _statusHost;
-    private readonly List<IDisposable> _subscriptions = [];
-    private string? _instanceId;
-
-    public SamplePluginStatusClockWidget(PluginDesktopComponentContext context)
-    {
-        _context = context;
-        _localizer = PluginLocalizer.Create(context);
-        _stateService = context.GetService<SamplePluginRuntimeStateService>()
-            ?? throw new InvalidOperationException("SamplePluginRuntimeStateService is not available.");
-        _clockService = context.GetService<SamplePluginClockService>()
-            ?? throw new InvalidOperationException("SamplePluginClockService is not available.");
-        _messageBus = context.GetService<IPluginMessageBus>()
-            ?? throw new InvalidOperationException("IPluginMessageBus is not available.");
-
-        _timeTextBlock = new TextBlock
-        {
-            Foreground = Brushes.White,
-            FontWeight = FontWeight.Bold,
-            HorizontalAlignment = HorizontalAlignment.Left
-        };
-        _subtitleTextBlock = new TextBlock
-        {
-            Foreground = new SolidColorBrush(Color.Parse("#FFBFE9FF")),
-            HorizontalAlignment = HorizontalAlignment.Left,
-            TextWrapping = TextWrapping.Wrap
-        };
-        _statusPanel = new StackPanel
-        {
-            Spacing = 8
-        };
-        _statusHost = new Border
-        {
-            Background = new SolidColorBrush(Color.Parse("#1F082F49")),
-            BorderBrush = new SolidColorBrush(Color.Parse("#5538BDF8")),
-            BorderThickness = new Thickness(1),
-            Child = _statusPanel
-        };
-
-        Background = new LinearGradientBrush
-        {
-            StartPoint = new RelativePoint(0, 0, RelativeUnit.Relative),
-            EndPoint = new RelativePoint(1, 1, RelativeUnit.Relative),
-            GradientStops =
-            [
-                new GradientStop(Color.Parse("#FF07111F"), 0),
-                new GradientStop(Color.Parse("#FF0C4A6E"), 0.55),
-                new GradientStop(Color.Parse("#FF0EA5E9"), 1)
-            ]
-        };
-        BorderBrush = new SolidColorBrush(Color.Parse("#6648C7FF"));
-        BorderThickness = new Thickness(1);
-        HorizontalAlignment = HorizontalAlignment.Stretch;
-        VerticalAlignment = VerticalAlignment.Stretch;
-        Child = new Grid
-        {
-            RowDefinitions = new RowDefinitions("Auto,*"),
-            RowSpacing = 14,
-            Children =
-            {
-                new StackPanel
-                {
-                    Spacing = 4,
-                    HorizontalAlignment = HorizontalAlignment.Left,
-                    Children =
-                    {
-                        _timeTextBlock,
-                        _subtitleTextBlock
-                    }
-                },
-                _statusHost
-            }
-        };
-
-        Grid.SetRow(((Grid)Child).Children[1], 1);
-
-        AttachedToVisualTree += OnAttachedToVisualTree;
-        DetachedFromVisualTree += OnDetachedFromVisualTree;
-        SizeChanged += OnSizeChanged;
-
-        RefreshClock(_clockService.CurrentTime);
-        UpdateSubtitle();
-        RefreshStatusPanel();
-        ApplyScale();
-    }
-
-    private void OnAttachedToVisualTree(object? sender, VisualTreeAttachmentEventArgs e)
-    {
-        if (string.IsNullOrWhiteSpace(_instanceId))
-        {
-            _instanceId = _stateService.RegisterComponentInstance(
-                _context.ComponentId,
-                _context.PlacementId,
-                _context.CellSize);
-        }
-
-        _stateService.MarkFrontendReady(T(
-            "status.frontend.detail.widget_connected",
-            "组件界面已接入插件服务与通信。"));
-        SubscribeToPluginBus();
-
-        RefreshClock(_clockService.CurrentTime);
-        UpdateSubtitle();
-        RefreshStatusPanel();
-    }
-
-    private void OnDetachedFromVisualTree(object? sender, VisualTreeAttachmentEventArgs e)
-    {
-        foreach (var subscription in _subscriptions)
-        {
-            subscription.Dispose();
-        }
-
-        _subscriptions.Clear();
-
-        if (string.IsNullOrWhiteSpace(_instanceId))
-        {
-            return;
-        }
-
-        _stateService.UnregisterComponentInstance(_instanceId);
-        _instanceId = null;
-    }
-
-    private void OnSizeChanged(object? sender, SizeChangedEventArgs e)
-    {
-        ApplyScale();
-        RefreshStatusPanel();
-    }
-
-    private void SubscribeToPluginBus()
-    {
-        if (_subscriptions.Count > 0)
-        {
-            return;
-        }
-
-        _subscriptions.Add(_messageBus.Subscribe<SamplePluginClockTickMessage>(message =>
-            Dispatcher.UIThread.Post(() => RefreshClock(message.CurrentTime))));
-
-        _subscriptions.Add(_messageBus.Subscribe<SamplePluginStateChangedMessage>(_ =>
-            Dispatcher.UIThread.Post(() =>
-            {
-                UpdateSubtitle();
-                RefreshStatusPanel();
-            })));
-    }
-
-    private void RefreshClock(DateTimeOffset currentTime)
-    {
-        _timeTextBlock.Text = currentTime.LocalDateTime.ToString("HH:mm:ss");
-    }
-
-    private void UpdateSubtitle()
-    {
-        var snapshot = _stateService.GetSnapshot();
-        _subtitleTextBlock.Text = string.IsNullOrWhiteSpace(_context.PlacementId)
-            ? Tf("widget.subtitle.preview", "预览界面 | 已放置：{0}", snapshot.PlacedCount)
-            : Tf("widget.subtitle.placement", "位置 {0} | 已放置：{1}", _context.PlacementId!, snapshot.PlacedCount);
-    }
-
-    private void RefreshStatusPanel()
-    {
-        _statusPanel.Children.Clear();
-
-        var snapshot = _stateService.GetSnapshot();
-        var basis = GetLayoutBasis();
-        var titleSize = Math.Clamp(basis * 0.068, 11, 16);
-        var detailSize = Math.Clamp(basis * 0.052, 9, 13);
-
-        foreach (var entry in snapshot.StatusEntries)
-        {
-            var palette = GetPalette(entry.State);
-            _statusPanel.Children.Add(new Border
-            {
-                Background = new SolidColorBrush(palette.Background),
-                BorderBrush = new SolidColorBrush(palette.Border),
-                BorderThickness = new Thickness(1),
-                CornerRadius = new CornerRadius(12),
-                Padding = new Thickness(10, 8),
-                Child = new Grid
-                {
-                    RowDefinitions = new RowDefinitions("Auto,Auto"),
-                    ColumnDefinitions = new ColumnDefinitions("Auto,*,Auto"),
-                    ColumnSpacing = 8,
-                    Children =
-                    {
-                        new Border
-                        {
-                            Width = Math.Clamp(basis * 0.038, 8, 11),
-                            Height = Math.Clamp(basis * 0.038, 8, 11),
-                            CornerRadius = new CornerRadius(999),
-                            Background = new SolidColorBrush(palette.Dot),
-                            VerticalAlignment = VerticalAlignment.Center
-                        },
-                        new TextBlock
-                        {
-                            Text = entry.Title,
-                            FontSize = titleSize,
-                            FontWeight = FontWeight.SemiBold,
-                            Foreground = Brushes.White,
-                            TextWrapping = TextWrapping.Wrap
-                        },
-                        new TextBlock
-                        {
-                            Text = entry.Summary,
-                            FontSize = detailSize,
-                            Foreground = new SolidColorBrush(Color.Parse("#FFD7F2FF")),
-                            HorizontalAlignment = HorizontalAlignment.Right,
-                            TextAlignment = TextAlignment.Right,
-                            VerticalAlignment = VerticalAlignment.Center
-                        },
-                        new TextBlock
-                        {
-                            Text = entry.Detail,
-                            FontSize = detailSize,
-                            Foreground = new SolidColorBrush(Color.Parse("#FFD7F2FF")),
-                            TextWrapping = TextWrapping.Wrap
-                        }
-                    }
-                }
-            });
-
-            var row = (Grid)((Border)_statusPanel.Children[^1]).Child!;
-            Grid.SetColumn(row.Children[1], 1);
-            Grid.SetColumn(row.Children[2], 2);
-            Grid.SetColumnSpan(row.Children[3], 3);
-            Grid.SetRow(row.Children[3], 1);
-        }
-    }
-
-    private void ApplyScale()
-    {
-        var basis = GetLayoutBasis();
-        Padding = new Thickness(Math.Clamp(basis * 0.09, 16, 26));
-        CornerRadius = new CornerRadius(Math.Clamp(basis * 0.14, 20, 34));
-        _timeTextBlock.FontSize = Math.Clamp(basis * 0.22, 30, 58);
-        _subtitleTextBlock.FontSize = Math.Clamp(basis * 0.062, 11, 17);
-        _statusHost.Padding = new Thickness(Math.Clamp(basis * 0.045, 10, 18));
-        _statusHost.CornerRadius = new CornerRadius(Math.Clamp(basis * 0.09, 14, 22));
-        _statusPanel.Spacing = Math.Clamp(basis * 0.024, 6, 10);
-    }
-
-    private double GetLayoutBasis()
-    {
-        var width = Bounds.Width > 1 ? Bounds.Width : _context.CellSize * 4;
-        var height = Bounds.Height > 1 ? Bounds.Height : _context.CellSize * 4;
-        return Math.Max(_context.CellSize * 4, Math.Min(width, height));
-    }
-
-    private static (Color Background, Color Border, Color Dot) GetPalette(SamplePluginHealthState state)
-    {
-        return state switch
-        {
-            SamplePluginHealthState.Healthy => (
-                Color.Parse("#1F0F766E"),
-                Color.Parse("#4D5EEAD4"),
-                Color.Parse("#5EEAD4")),
-            SamplePluginHealthState.Faulted => (
-                Color.Parse("#29B91C1C"),
-                Color.Parse("#66F87171"),
-                Color.Parse("#F87171")),
-            _ => (
-                Color.Parse("#1F7C2D12"),
-                Color.Parse("#66FDBA74"),
-                Color.Parse("#FDBA74"))
-        };
-    }
-
-    private string T(string key, string fallback)
-    {
-        return _localizer.GetString(key, fallback);
-    }
-
-    private string Tf(string key, string fallback, params object[] args)
-    {
-        return _localizer.Format(key, fallback, args);
-    }
-}

LanAirApp/samples/LanMountainDesktop.SamplePlugin/plugin.json

@@ -1,9 +0,0 @@
-{
-  "id": "LanMountainDesktop.SamplePlugin",
-  "name": "LanMountain Sample Plugin",
-  "description": "Example plugin used to validate PluginSdk loading and isolation.",
-  "author": "LanMountainDesktop",
-  "version": "1.0.0",
-  "apiVersion": "1.0.0",
-  "entranceAssembly": "LanMountainDesktop.SamplePlugin.dll"
-}

LanAirApp/samples/README.md

@@ -1,11 +0,0 @@
-# 示例插件目录
-
-## 中文
-
-本目录用于存放阑山桌面的示例插件和参考实现。
-
-当前标准示例为 `LanMountainDesktop.SamplePlugin`。
-
-## English
-
-This directory stores sample plugins and reference implementations. The current standard sample is `LanMountainDesktop.SamplePlugin`.

LanAirApp/standards/README.md

@@ -1,9 +0,0 @@
-# 插件标准说明
-
-## 中文
-
-本目录存放插件开发需要遵循的基础约定，包括 `.laapp`、`plugin.json`、`Localization/` 以及仓库根目录 README 和安装包等要求。
-
-## English
-
-This directory stores the baseline conventions for plugin development, including `.laapp`, `plugin.json`, `Localization/`, and repository-root deliverables.

LanAirApp/standards/plugin.template.json

@@ -1,9 +0,0 @@
-{
-  "id": "LanMountainDesktop.YourPlugin",
-  "name": "Your Plugin",
-  "description": "Describe what your plugin adds to LanMountainDesktop.",
-  "author": "Your Name",
-  "version": "1.0.0",
-  "apiVersion": "1.0.0",
-  "entranceAssembly": "LanMountainDesktop.YourPlugin.dll"
-}

LanAirApp/tools/LanMountainDesktop.PluginPackager/Program.cs

@@ -1,136 +0,0 @@
-using System.IO.Compression;
-using LanMountainDesktop.PluginSdk;
-
-return await RunAsync(args);
-
-static async Task<int> RunAsync(string[] args)
-{
-    if (args.Length == 0 || args.Any(arg => string.Equals(arg, "--help", StringComparison.OrdinalIgnoreCase)))
-    {
-        PrintUsage();
-        return 0;
-    }
-
-    string? inputDirectory = null;
-    string? outputPath = null;
-    var overwrite = false;
-
-    for (var i = 0; i < args.Length; i++)
-    {
-        switch (args[i])
-        {
-            case "--input":
-                inputDirectory = ReadValue(args, ref i, "--input");
-                break;
-            case "--output":
-                outputPath = ReadValue(args, ref i, "--output");
-                break;
-            case "--overwrite":
-                overwrite = true;
-                break;
-            default:
-                throw new InvalidOperationException($"Unknown argument '{args[i]}'.");
-        }
-    }
-
-    if (string.IsNullOrWhiteSpace(inputDirectory))
-    {
-        throw new InvalidOperationException("Missing required argument '--input'.");
-    }
-
-    var fullInputDirectory = Path.GetFullPath(inputDirectory);
-    if (!Directory.Exists(fullInputDirectory))
-    {
-        throw new DirectoryNotFoundException($"Plugin build directory '{fullInputDirectory}' was not found.");
-    }
-
-    var manifestPath = Path.Combine(fullInputDirectory, PluginSdkInfo.ManifestFileName);
-    if (!File.Exists(manifestPath))
-    {
-        throw new FileNotFoundException(
-            $"Plugin build directory '{fullInputDirectory}' does not contain '{PluginSdkInfo.ManifestFileName}'.",
-            manifestPath);
-    }
-
-    var manifest = PluginManifest.Load(manifestPath);
-    var entranceAssemblyPath = manifest.ResolveEntranceAssemblyPath(manifestPath);
-    if (!File.Exists(entranceAssemblyPath))
-    {
-        throw new FileNotFoundException(
-            $"The entrance assembly declared by '{PluginSdkInfo.ManifestFileName}' was not found.",
-            entranceAssemblyPath);
-    }
-
-    outputPath ??= Path.Combine(
-        Path.GetDirectoryName(fullInputDirectory) ?? fullInputDirectory,
-        BuildPackageFileName(manifest.Id));
-
-    var fullOutputPath = Path.GetFullPath(outputPath);
-    var inputDirectoryWithSeparator = EnsureTrailingSeparator(fullInputDirectory);
-    if (fullOutputPath.StartsWith(inputDirectoryWithSeparator, StringComparison.OrdinalIgnoreCase))
-    {
-        throw new InvalidOperationException("The output .laapp path cannot be placed inside the source directory.");
-    }
-
-    var destinationDirectory = Path.GetDirectoryName(fullOutputPath);
-    if (string.IsNullOrWhiteSpace(destinationDirectory))
-    {
-        throw new InvalidOperationException("Failed to determine the output directory for the .laapp package.");
-    }
-
-    Directory.CreateDirectory(destinationDirectory);
-    if (File.Exists(fullOutputPath))
-    {
-        if (!overwrite)
-        {
-            throw new InvalidOperationException(
-                $"The output package '{fullOutputPath}' already exists. Pass '--overwrite' to replace it.");
-        }
-
-        File.Delete(fullOutputPath);
-    }
-
-    await Task.Run(() => ZipFile.CreateFromDirectory(
-        fullInputDirectory,
-        fullOutputPath,
-        CompressionLevel.Optimal,
-        includeBaseDirectory: false));
-
-    Console.WriteLine($"Packaged '{manifest.Name}' to '{fullOutputPath}'.");
-    return 0;
-}
-
-static string ReadValue(IReadOnlyList<string> args, ref int index, string optionName)
-{
-    var nextIndex = index + 1;
-    if (nextIndex >= args.Count)
-    {
-        throw new InvalidOperationException($"Missing value for '{optionName}'.");
-    }
-
-    index = nextIndex;
-    return args[nextIndex];
-}
-
-static string BuildPackageFileName(string pluginId)
-{
-    var invalidChars = Path.GetInvalidFileNameChars();
-    var safeName = new string(pluginId.Select(ch => invalidChars.Contains(ch) ? '_' : ch).ToArray());
-    return safeName + PluginSdkInfo.PackageFileExtension;
-}
-
-static string EnsureTrailingSeparator(string path)
-{
-    return path.EndsWith(Path.DirectorySeparatorChar.ToString(), StringComparison.Ordinal)
-        ? path
-        : path + Path.DirectorySeparatorChar;
-}
-
-static void PrintUsage()
-{
-    Console.WriteLine("LanMountainDesktop.PluginPackager");
-    Console.WriteLine("Usage:");
-    Console.WriteLine("  --input <plugin build directory>   Required");
-    Console.WriteLine("  --output <path to .laapp>          Optional");
-    Console.WriteLine("  --overwrite                        Optional");
-}

LanMountainDesktop.Appearance/AppearanceCornerRadiusTokenFactory.cs

@@ -0,0 +1,27 @@
+using Avalonia;
+using LanMountainDesktop.Settings.Core;
+using LanMountainDesktop.Shared.Contracts;
+
+namespace LanMountainDesktop.Appearance;
+
+public static class AppearanceCornerRadiusTokenFactory
+{
+    public static AppearanceCornerRadiusTokens Create(double scale)
+    {
+        var normalizedScale = GlobalAppearanceSettings.NormalizeCornerRadiusScale(scale);
+        return new AppearanceCornerRadiusTokens(
+            Radius(6, normalizedScale),
+            Radius(10, normalizedScale),
+            Radius(14, normalizedScale),
+            Radius(18, normalizedScale),
+            Radius(24, normalizedScale),
+            Radius(30, normalizedScale),
+            Radius(36, normalizedScale));
+    }
+
+    private static CornerRadius Radius(double value, double scale)
+    {
+        var scaled = Math.Round(value * scale * 2, MidpointRounding.AwayFromZero) / 2d;
+        return new CornerRadius(scaled);
+    }
+}

LanMountainDesktop.Appearance/LanMountainDesktop.Appearance.csproj

@@ -0,0 +1,13 @@
+<Project Sdk="Microsoft.NET.Sdk">
+  <PropertyGroup>
+    <TargetFramework>net10.0</TargetFramework>
+    <Nullable>enable</Nullable>
+    <ImplicitUsings>enable</ImplicitUsings>
+  </PropertyGroup>
+  <ItemGroup>
+    <ProjectReference Include="..\LanMountainDesktop.PluginSdk\LanMountainDesktop.PluginSdk.csproj" />
+    <ProjectReference Include="..\LanMountainDesktop.Shared.Contracts\LanMountainDesktop.Shared.Contracts.csproj" />
+    <ProjectReference Include="..\LanMountainDesktop.Settings.Core\LanMountainDesktop.Settings.Core.csproj" />
+    <ProjectReference Include="..\LanMountainDesktop.Host.Abstractions\LanMountainDesktop.Host.Abstractions.csproj" />
+  </ItemGroup>
+</Project>

LanMountainDesktop.DesktopComponents.Runtime/LanMountainDesktop.DesktopComponents.Runtime.csproj

@@ -0,0 +1,14 @@
+<Project Sdk="Microsoft.NET.Sdk">
+  <PropertyGroup>
+    <TargetFramework>net10.0</TargetFramework>
+    <Nullable>enable</Nullable>
+    <ImplicitUsings>enable</ImplicitUsings>
+  </PropertyGroup>
+  <ItemGroup>
+    <ProjectReference Include="..\LanMountainDesktop.PluginSdk\LanMountainDesktop.PluginSdk.csproj" />
+    <ProjectReference Include="..\LanMountainDesktop.Shared.Contracts\LanMountainDesktop.Shared.Contracts.csproj" />
+    <ProjectReference Include="..\LanMountainDesktop.Settings.Core\LanMountainDesktop.Settings.Core.csproj" />
+    <ProjectReference Include="..\LanMountainDesktop.Appearance\LanMountainDesktop.Appearance.csproj" />
+    <ProjectReference Include="..\LanMountainDesktop.Host.Abstractions\LanMountainDesktop.Host.Abstractions.csproj" />
+  </ItemGroup>
+</Project>

LanMountainDesktop.DesktopHost/DesktopBootstrap.cs

@@ -0,0 +1,27 @@
+using System;
+using Avalonia;
+
+namespace LanMountainDesktop.DesktopHost;
+
+public static class DesktopBootstrap
+{
+    public static void InitializeStartupServices(Action initializeDeviceId, Action initializeCrashReporting, Action initializeUserBehaviorAnalytics, Action scheduleStartupCleanup)
+    {
+        ArgumentNullException.ThrowIfNull(initializeDeviceId);
+        ArgumentNullException.ThrowIfNull(initializeCrashReporting);
+        ArgumentNullException.ThrowIfNull(initializeUserBehaviorAnalytics);
+        ArgumentNullException.ThrowIfNull(scheduleStartupCleanup);
+
+        initializeDeviceId();
+        initializeCrashReporting();
+        initializeUserBehaviorAnalytics();
+        scheduleStartupCleanup();
+    }
+
+    public static void InitializeApplication(Application application, Action initializeShell)
+    {
+        ArgumentNullException.ThrowIfNull(application);
+        ArgumentNullException.ThrowIfNull(initializeShell);
+        initializeShell();
+    }
+}

LanMountainDesktop.DesktopHost/DesktopShellHost.cs

@@ -0,0 +1,55 @@
+using System;
+using Avalonia;
+using Avalonia.Controls;
+using Avalonia.Controls.ApplicationLifetimes;
+using LanMountainDesktop.Host.Abstractions;
+
+namespace LanMountainDesktop.DesktopHost;
+
+public sealed class DesktopShellHost : IDesktopShellHost
+{
+    private readonly Action _initializePluginRuntime;
+    private readonly Action _initializeTrayIcon;
+    private readonly Action<IClassicDesktopStyleApplicationLifetime> _createAndAssignMainWindow;
+    private readonly Action _performExitCleanup;
+    private readonly Action _startActivationListener;
+    private readonly Action _startWeatherRefresh;
+
+    public DesktopShellHost(
+        Action initializePluginRuntime,
+        Action initializeTrayIcon,
+        Action<IClassicDesktopStyleApplicationLifetime> createAndAssignMainWindow,
+        Action performExitCleanup,
+        Action startActivationListener,
+        Action startWeatherRefresh)
+    {
+        _initializePluginRuntime = initializePluginRuntime;
+        _initializeTrayIcon = initializeTrayIcon;
+        _createAndAssignMainWindow = createAndAssignMainWindow;
+        _performExitCleanup = performExitCleanup;
+        _startActivationListener = startActivationListener;
+        _startWeatherRefresh = startWeatherRefresh;
+    }
+
+    public void Initialize()
+    {
+        throw new InvalidOperationException("An application instance is required to initialize the desktop shell.");
+    }
+
+    public void Initialize(Application application)
+    {
+        ArgumentNullException.ThrowIfNull(application);
+
+        _initializePluginRuntime();
+        _initializeTrayIcon();
+
+        if (application.ApplicationLifetime is IClassicDesktopStyleApplicationLifetime desktop)
+        {
+            desktop.Exit += (_, _) => _performExitCleanup();
+            _createAndAssignMainWindow(desktop);
+            _startActivationListener();
+        }
+
+        _startWeatherRefresh();
+    }
+}

LanMountainDesktop.DesktopHost/DesktopStartupCoordinator.cs

@@ -0,0 +1,15 @@
+using System;
+
+namespace LanMountainDesktop.DesktopHost;
+
+public sealed class DesktopStartupCoordinator
+{
+    private readonly Action _restoreWorkspaceState;
+
+    public DesktopStartupCoordinator(Action restoreWorkspaceState)
+    {
+        _restoreWorkspaceState = restoreWorkspaceState ?? throw new ArgumentNullException(nameof(restoreWorkspaceState));
+    }
+
+    public void Restore() => _restoreWorkspaceState();
+}

LanMountainDesktop.DesktopHost/LanMountainDesktop.DesktopHost.csproj

@@ -0,0 +1,18 @@
+<Project Sdk="Microsoft.NET.Sdk">
+  <PropertyGroup>
+    <TargetFramework>net10.0</TargetFramework>
+    <Nullable>enable</Nullable>
+    <ImplicitUsings>enable</ImplicitUsings>
+  </PropertyGroup>
+  <ItemGroup>
+    <PackageReference Include="Avalonia" Version="11.3.12" />
+  </ItemGroup>
+  <ItemGroup>
+    <ProjectReference Include="..\LanMountainDesktop.PluginSdk\LanMountainDesktop.PluginSdk.csproj" />
+    <ProjectReference Include="..\LanMountainDesktop.Shared.Contracts\LanMountainDesktop.Shared.Contracts.csproj" />
+    <ProjectReference Include="..\LanMountainDesktop.Settings.Core\LanMountainDesktop.Settings.Core.csproj" />
+    <ProjectReference Include="..\LanMountainDesktop.Appearance\LanMountainDesktop.Appearance.csproj" />
+    <ProjectReference Include="..\LanMountainDesktop.DesktopComponents.Runtime\LanMountainDesktop.DesktopComponents.Runtime.csproj" />
+    <ProjectReference Include="..\LanMountainDesktop.Host.Abstractions\LanMountainDesktop.Host.Abstractions.csproj" />
+  </ItemGroup>
+</Project>

LanMountainDesktop.DesktopHost/SettingsWindowHost.cs

@@ -0,0 +1,18 @@
+using System;
+
+namespace LanMountainDesktop.DesktopHost;
+
+public sealed class SettingsWindowHost
+{
+    private readonly Action<string, string?> _openSettingsWindow;
+
+    public SettingsWindowHost(Action<string, string?> openSettingsWindow)
+    {
+        _openSettingsWindow = openSettingsWindow ?? throw new ArgumentNullException(nameof(openSettingsWindow));
+    }
+
+    public void Open(string source, string? pageId = null)
+    {
+        _openSettingsWindow(source, pageId);
+    }
+}

LanMountainDesktop.DesktopHost/ShutdownCoordinator.cs

@@ -0,0 +1,19 @@
+using System;
+
+namespace LanMountainDesktop.DesktopHost;
+
+public sealed class ShutdownCoordinator
+{
+    private readonly Action<bool, string> _prepareForShutdown;
+    private readonly Action<string> _resetShutdownIntent;
+
+    public ShutdownCoordinator(Action<bool, string> prepareForShutdown, Action<string> resetShutdownIntent)
+    {
+        _prepareForShutdown = prepareForShutdown ?? throw new ArgumentNullException(nameof(prepareForShutdown));
+        _resetShutdownIntent = resetShutdownIntent ?? throw new ArgumentNullException(nameof(resetShutdownIntent));
+    }
+
+    public void Prepare(bool isRestart, string source) => _prepareForShutdown(isRestart, source);
+
+    public void Reset(string source) => _resetShutdownIntent(source);
+}

LanMountainDesktop.Host.Abstractions/ComponentChromeContext.cs

@@ -0,0 +1,12 @@
+using LanMountainDesktop.PluginSdk;
+using LanMountainDesktop.Shared.Contracts;
+
+namespace LanMountainDesktop.Host.Abstractions;
+
+public sealed record ComponentChromeContext(
+    string ComponentId,
+    string? PlacementId,
+    double CellSize,
+    double GlobalCornerRadiusScale,
+    AppearanceCornerRadiusTokens CornerRadiusTokens,
+    SettingsScope Scope = SettingsScope.App);

LanMountainDesktop.Host.Abstractions/IDesktopShellHost.cs

@@ -0,0 +1,6 @@
+namespace LanMountainDesktop.Host.Abstractions;
+
+public interface IDesktopShellHost
+{
+    void Initialize();
+}

LanMountainDesktop.Host.Abstractions/LanMountainDesktop.Host.Abstractions.csproj

@@ -1,15 +1,10 @@
 <Project Sdk="Microsoft.NET.Sdk">
-
   <PropertyGroup>
-    <OutputType>Exe</OutputType>
     <TargetFramework>net10.0</TargetFramework>
-    <ImplicitUsings>enable</ImplicitUsings>
     <Nullable>enable</Nullable>
-    <Version>1.0.0</Version>
+    <ImplicitUsings>enable</ImplicitUsings>
   </PropertyGroup>
-
   <ItemGroup>
-    <ProjectReference Include="..\..\..\LanMountainDesktop.PluginSdk\LanMountainDesktop.PluginSdk.csproj" />
+    <ProjectReference Include="..\LanMountainDesktop.PluginSdk\LanMountainDesktop.PluginSdk.csproj" />
   </ItemGroup>
-
 </Project>

LanMountainDesktop.PluginSdk/IPluginAppearanceContext.cs

@@ -0,0 +1,10 @@
+namespace LanMountainDesktop.PluginSdk;
+
+public interface IPluginAppearanceContext
+{
+    PluginAppearanceSnapshot Snapshot { get; }
+
+    double ResolveScaledCornerRadius(double baseRadius, double? minimum = null, double? maximum = null);
+
+    double ResolveCornerRadius(PluginCornerRadiusPreset preset, double? minimum = null, double? maximum = null);
+}

LanMountainDesktop.PluginSdk/IPluginRuntimeContext.cs

@@ -12,6 +12,8 @@ public interface IPluginRuntimeContext
 
     IReadOnlyDictionary<string, object?> Properties { get; }
 
+    IPluginAppearanceContext Appearance { get; }
+
     T? GetService<T>();
 
     bool TryGetProperty<T>(string key, out T? value);

LanMountainDesktop.PluginSdk/LanMountainDesktop.PluginSdk.csproj

@@ -12,6 +12,7 @@
     <PackageReference Include="Avalonia" Version="11.3.12" />
     <PackageReference Include="Microsoft.Extensions.DependencyInjection.Abstractions" Version="10.0.0" />
     <PackageReference Include="Microsoft.Extensions.Hosting.Abstractions" Version="10.0.0" />
+    <ProjectReference Include="..\LanMountainDesktop.Shared.Contracts\LanMountainDesktop.Shared.Contracts.csproj" />
   </ItemGroup>
 
 </Project>

LanMountainDesktop.PluginSdk/PluginAppearanceContext.cs

@@ -0,0 +1,49 @@
+namespace LanMountainDesktop.PluginSdk;
+
+public sealed class PluginAppearanceContext : IPluginAppearanceContext
+{
+    public PluginAppearanceContext(PluginAppearanceSnapshot snapshot)
+    {
+        ArgumentNullException.ThrowIfNull(snapshot);
+        ArgumentNullException.ThrowIfNull(snapshot.CornerRadiusTokens);
+
+        Snapshot = snapshot with
+        {
+            GlobalCornerRadiusScale = Math.Max(0d, snapshot.GlobalCornerRadiusScale),
+            ThemeVariant = string.IsNullOrWhiteSpace(snapshot.ThemeVariant)
+                ? "Unknown"
+                : snapshot.ThemeVariant.Trim()
+        };
+    }
+
+    public PluginAppearanceSnapshot Snapshot { get; }
+
+    public double ResolveScaledCornerRadius(double baseRadius, double? minimum = null, double? maximum = null)
+    {
+        var scale = Snapshot.GlobalCornerRadiusScale;
+        var scaled = Math.Max(0d, baseRadius) * scale;
+        var scaledMin = minimum.HasValue ? minimum.Value * scale : scaled;
+        var scaledMax = maximum.HasValue ? maximum.Value * scale : scaled;
+        return minimum.HasValue || maximum.HasValue
+            ? Math.Clamp(scaled, scaledMin, scaledMax)
+            : scaled;
+    }
+
+    public double ResolveCornerRadius(PluginCornerRadiusPreset preset, double? minimum = null, double? maximum = null)
+    {
+        var resolved = Math.Max(0d, Snapshot.CornerRadiusTokens.Get(preset));
+        if (!minimum.HasValue && !maximum.HasValue)
+        {
+            return resolved;
+        }
+
+        var clampedMin = minimum ?? resolved;
+        var clampedMax = maximum ?? resolved;
+        if (clampedMin > clampedMax)
+        {
+            (clampedMin, clampedMax) = (clampedMax, clampedMin);
+        }
+
+        return Math.Clamp(resolved, clampedMin, clampedMax);
+    }
+}

LanMountainDesktop.PluginSdk/PluginAppearanceSnapshot.cs

@@ -0,0 +1,6 @@
+namespace LanMountainDesktop.PluginSdk;
+
+public sealed record PluginAppearanceSnapshot(
+    double GlobalCornerRadiusScale,
+    PluginCornerRadiusTokens CornerRadiusTokens,
+    string ThemeVariant);

LanMountainDesktop.PluginSdk/PluginCornerRadiusPreset.cs

@@ -0,0 +1,13 @@
+namespace LanMountainDesktop.PluginSdk;
+
+public enum PluginCornerRadiusPreset
+{
+    Default = 0,
+    Micro = 1,
+    Xs = 2,
+    Sm = 3,
+    Md = 4,
+    Lg = 5,
+    Xl = 6,
+    Island = 7
+}

LanMountainDesktop.PluginSdk/PluginCornerRadiusTokens.cs

@@ -0,0 +1,49 @@
+using Avalonia;
+using LanMountainDesktop.Shared.Contracts;
+
+namespace LanMountainDesktop.PluginSdk;
+
+public sealed record PluginCornerRadiusTokens(
+    double Micro,
+    double Xs,
+    double Sm,
+    double Md,
+    double Lg,
+    double Xl,
+    double Island)
+{
+    public double Get(PluginCornerRadiusPreset preset)
+    {
+        return preset switch
+        {
+            PluginCornerRadiusPreset.Default => Md,
+            PluginCornerRadiusPreset.Micro => Micro,
+            PluginCornerRadiusPreset.Xs => Xs,
+            PluginCornerRadiusPreset.Sm => Sm,
+            PluginCornerRadiusPreset.Md => Md,
+            PluginCornerRadiusPreset.Lg => Lg,
+            PluginCornerRadiusPreset.Xl => Xl,
+            PluginCornerRadiusPreset.Island => Island,
+            _ => Md
+        };
+    }
+
+    public CornerRadius ToCornerRadius(PluginCornerRadiusPreset preset)
+    {
+        return new CornerRadius(Get(preset));
+    }
+
+    public static PluginCornerRadiusTokens FromShared(AppearanceCornerRadiusTokens tokens)
+    {
+        ArgumentNullException.ThrowIfNull(tokens);
+
+        return new PluginCornerRadiusTokens(
+            tokens.Micro.TopLeft,
+            tokens.Xs.TopLeft,
+            tokens.Sm.TopLeft,
+            tokens.Md.TopLeft,
+            tokens.Lg.TopLeft,
+            tokens.Xl.TopLeft,
+            tokens.Island.TopLeft);
+    }
+}

LanMountainDesktop.PluginSdk/PluginDesktopComponentContext.cs

@@ -11,6 +11,7 @@ public sealed class PluginDesktopComponentContext
         string componentId,
         string? placementId,
         double cellSize,
+        IPluginAppearanceContext appearance,
         IPluginSettingsService? pluginSettings = null)
     {
         ArgumentNullException.ThrowIfNull(manifest);
@@ -19,6 +20,7 @@ public sealed class PluginDesktopComponentContext
         ArgumentException.ThrowIfNullOrWhiteSpace(componentId);
         ArgumentNullException.ThrowIfNull(services);
         ArgumentNullException.ThrowIfNull(properties);
+        ArgumentNullException.ThrowIfNull(appearance);
 
         Manifest = manifest;
         PluginDirectory = pluginDirectory;
@@ -28,6 +30,7 @@ public sealed class PluginDesktopComponentContext
         ComponentId = componentId.Trim();
         PlacementId = string.IsNullOrWhiteSpace(placementId) ? null : placementId.Trim();
         CellSize = Math.Max(1, cellSize);
+        Appearance = appearance;
         PluginSettings = pluginSettings;
     }
 
@@ -47,8 +50,24 @@ public sealed class PluginDesktopComponentContext
 
     public double CellSize { get; }
 
+    public IPluginAppearanceContext Appearance { get; }
+
+    public double GlobalCornerRadiusScale => Appearance.Snapshot.GlobalCornerRadiusScale;
+
+    public PluginCornerRadiusTokens CornerRadiusTokens => Appearance.Snapshot.CornerRadiusTokens;
+
     public IPluginSettingsService? PluginSettings { get; }
 
+    public double ResolveScaledCornerRadius(double baseRadius, double? minimum = null, double? maximum = null)
+    {
+        return Appearance.ResolveScaledCornerRadius(baseRadius, minimum, maximum);
+    }
+
+    public double ResolveCornerRadius(PluginCornerRadiusPreset preset, double? minimum = null, double? maximum = null)
+    {
+        return Appearance.ResolveCornerRadius(preset, minimum, maximum);
+    }
+
     public T? GetService<T>()
     {
         return (T?)Services.GetService(typeof(T));

LanMountainDesktop.PluginSdk/PluginDesktopComponentOptions.cs

@@ -0,0 +1,28 @@
+namespace LanMountainDesktop.PluginSdk;
+
+public sealed class PluginDesktopComponentOptions
+{
+    public required string ComponentId { get; init; }
+
+    public required string DisplayName { get; init; }
+
+    public string IconKey { get; init; } = "PuzzlePiece";
+
+    public string Category { get; init; } = "Plugins";
+
+    public int MinWidthCells { get; init; } = 2;
+
+    public int MinHeightCells { get; init; } = 2;
+
+    public bool AllowDesktopPlacement { get; init; } = true;
+
+    public bool AllowStatusBarPlacement { get; init; }
+
+    public PluginDesktopComponentResizeMode ResizeMode { get; init; } = PluginDesktopComponentResizeMode.Proportional;
+
+    public string? DisplayNameLocalizationKey { get; init; }
+
+    public PluginCornerRadiusPreset CornerRadiusPreset { get; init; } = PluginCornerRadiusPreset.Default;
+
+    public Func<IPluginAppearanceContext, double, double>? CornerRadiusResolver { get; init; }
+}

LanMountainDesktop.PluginSdk/PluginDesktopComponentRegistration.cs

@@ -5,67 +5,37 @@ namespace LanMountainDesktop.PluginSdk;
 public sealed class PluginDesktopComponentRegistration
 {
     public PluginDesktopComponentRegistration(
-        string componentId,
-        string displayName,
         Func<IServiceProvider, PluginDesktopComponentContext, Control> controlFactory,
-        string iconKey = "PuzzlePiece",
+        PluginDesktopComponentOptions options)
-        string category = "Plugins",
-        int minWidthCells = 2,
-        int minHeightCells = 2,
-        bool allowDesktopPlacement = true,
-        bool allowStatusBarPlacement = false,
-        PluginDesktopComponentResizeMode resizeMode = PluginDesktopComponentResizeMode.Proportional,
-        string? displayNameLocalizationKey = null,
-        Func<double, double>? cornerRadiusResolver = null)
     {
-        ArgumentException.ThrowIfNullOrWhiteSpace(componentId);
-        ArgumentException.ThrowIfNullOrWhiteSpace(displayName);
-        ArgumentException.ThrowIfNullOrWhiteSpace(iconKey);
-        ArgumentException.ThrowIfNullOrWhiteSpace(category);
         ArgumentNullException.ThrowIfNull(controlFactory);
+        ArgumentNullException.ThrowIfNull(options);
+        ArgumentException.ThrowIfNullOrWhiteSpace(options.ComponentId);
+        ArgumentException.ThrowIfNullOrWhiteSpace(options.DisplayName);
+        ArgumentException.ThrowIfNullOrWhiteSpace(options.IconKey);
+        ArgumentException.ThrowIfNullOrWhiteSpace(options.Category);
 
-        ComponentId = componentId.Trim();
+        ComponentId = options.ComponentId.Trim();
-        DisplayName = displayName.Trim();
+        DisplayName = options.DisplayName.Trim();
-        DisplayNameLocalizationKey = string.IsNullOrWhiteSpace(displayNameLocalizationKey)
+        DisplayNameLocalizationKey = string.IsNullOrWhiteSpace(options.DisplayNameLocalizationKey)
             ? null
-            : displayNameLocalizationKey.Trim();
+            : options.DisplayNameLocalizationKey.Trim();
         ControlFactory = controlFactory;
-        IconKey = iconKey.Trim();
+        IconKey = options.IconKey.Trim();
-        Category = category.Trim();
+        Category = options.Category.Trim();
-        MinWidthCells = Math.Max(1, minWidthCells);
+        MinWidthCells = Math.Max(1, options.MinWidthCells);
-        MinHeightCells = Math.Max(1, minHeightCells);
+        MinHeightCells = Math.Max(1, options.MinHeightCells);
-        AllowDesktopPlacement = allowDesktopPlacement;
+        AllowDesktopPlacement = options.AllowDesktopPlacement;
-        AllowStatusBarPlacement = allowStatusBarPlacement;
+        AllowStatusBarPlacement = options.AllowStatusBarPlacement;
-        ResizeMode = resizeMode;
+        ResizeMode = options.ResizeMode;
-        CornerRadiusResolver = cornerRadiusResolver;
+        CornerRadiusPreset = options.CornerRadiusPreset;
+        CornerRadiusResolver = options.CornerRadiusResolver;
     }
 
     public PluginDesktopComponentRegistration(
-        string componentId,
-        string displayName,
         Func<PluginDesktopComponentContext, Control> controlFactory,
-        string iconKey = "PuzzlePiece",
+        PluginDesktopComponentOptions options)
-        string category = "Plugins",
+        : this((_, context) => controlFactory(context), options)
-        int minWidthCells = 2,
-        int minHeightCells = 2,
-        bool allowDesktopPlacement = true,
-        bool allowStatusBarPlacement = false,
-        PluginDesktopComponentResizeMode resizeMode = PluginDesktopComponentResizeMode.Proportional,
-        string? displayNameLocalizationKey = null,
-        Func<double, double>? cornerRadiusResolver = null)
-        : this(
-            componentId,
-            displayName,
-            (_, context) => controlFactory(context),
-            iconKey,
-            category,
-            minWidthCells,
-            minHeightCells,
-            allowDesktopPlacement,
-            allowStatusBarPlacement,
-            resizeMode,
-            displayNameLocalizationKey,
-            cornerRadiusResolver)
     {
     }
 
@@ -91,5 +61,25 @@ public sealed class PluginDesktopComponentRegistration
 
     public PluginDesktopComponentResizeMode ResizeMode { get; }
 
-    public Func<double, double>? CornerRadiusResolver { get; }
+    public PluginCornerRadiusPreset CornerRadiusPreset { get; }
+
+    public Func<IPluginAppearanceContext, double, double>? CornerRadiusResolver { get; }
+
+    public double ResolveCornerRadius(IPluginAppearanceContext appearance, double cellSize)
+    {
+        ArgumentNullException.ThrowIfNull(appearance);
+
+        var resolved = CornerRadiusResolver is not null
+            ? CornerRadiusResolver(appearance, Math.Max(1d, cellSize))
+            : CornerRadiusPreset == PluginCornerRadiusPreset.Default
+                ? appearance.ResolveScaledCornerRadius(
+                    Math.Clamp(Math.Max(1d, cellSize) * 0.22, 8, 18),
+                    8,
+                    18)
+                : appearance.ResolveCornerRadius(CornerRadiusPreset);
+
+        return double.IsFinite(resolved)
+            ? Math.Max(0d, resolved)
+            : appearance.ResolveCornerRadius(PluginCornerRadiusPreset.Default);
+    }
 }

LanMountainDesktop.PluginSdk/PluginManifest.cs

@@ -87,8 +87,8 @@ public sealed record PluginManifest(
             throw new InvalidOperationException(
                 $"Plugin '{normalized.Id}' targets API version '{normalized.ApiVersion}' (major {requestedVersion.Major}), " +
                 $"but the host provides '{PluginSdkInfo.ApiVersion}' (major {currentVersion.Major}). " +
-                $"This host only supports v{currentVersion.Major}.x plugins. " +
+                $"This host only supports v{currentVersion.Major}.x plugins and rejects v{requestedVersion.Major}.x packages by default. " +
-                $"Migrate the plugin to API {PluginSdkInfo.ApiVersion} and rebuild the package.");
+                $"Migrate the plugin manifest and code to API {PluginSdkInfo.ApiVersion}, then rebuild and republish the package.");
         }
 
         return normalized;

LanMountainDesktop.PluginSdk/PluginSdkInfo.cs

@@ -2,7 +2,7 @@ namespace LanMountainDesktop.PluginSdk;
 
 public static class PluginSdkInfo
 {
-    public const string ApiVersion = "3.0.0";
+    public const string ApiVersion = "4.0.0";
     public const string ManifestFileName = "plugin.json";
     public const string PackageFileExtension = ".laapp";
     public const string DataDirectoryName = "Data";

LanMountainDesktop.PluginSdk/PluginServiceCollectionExtensions.cs

@@ -30,34 +30,15 @@ public static class PluginServiceCollectionExtensions
 
     public static IServiceCollection AddPluginDesktopComponent<TControl>(
         this IServiceCollection services,
-        string componentId,
+        PluginDesktopComponentOptions options)
-        string displayName,
-        string iconKey = "PuzzlePiece",
-        string category = "Plugins",
-        int minWidthCells = 2,
-        int minHeightCells = 2,
-        bool allowDesktopPlacement = true,
-        bool allowStatusBarPlacement = false,
-        PluginDesktopComponentResizeMode resizeMode = PluginDesktopComponentResizeMode.Proportional,
-        string? displayNameLocalizationKey = null,
-        Func<double, double>? cornerRadiusResolver = null)
         where TControl : Control
     {
         ArgumentNullException.ThrowIfNull(services);
+        ArgumentNullException.ThrowIfNull(options);
 
         services.AddSingleton(new PluginDesktopComponentRegistration(
-            componentId,
-            displayName,
             (provider, context) => ActivatorUtilities.CreateInstance<TControl>(provider, context),
-            iconKey,
+            options));
-            category,
-            minWidthCells,
-            minHeightCells,
-            allowDesktopPlacement,
-            allowStatusBarPlacement,
-            resizeMode,
-            displayNameLocalizationKey,
-            cornerRadiusResolver));
         return services;
     }
 

LanMountainDesktop.Settings.Core/GlobalAppearanceSettings.cs

@@ -0,0 +1,18 @@
+namespace LanMountainDesktop.Settings.Core;
+
+public static class GlobalAppearanceSettings
+{
+    public const double DefaultCornerRadiusScale = 1.0;
+    public const double MinimumCornerRadiusScale = 0.0;
+    public const double MaximumCornerRadiusScale = 2.50;
+
+    public static double NormalizeCornerRadiusScale(double value)
+    {
+        if (double.IsNaN(value) || double.IsInfinity(value))
+        {
+            return DefaultCornerRadiusScale;
+        }
+
+        return Math.Clamp(value, MinimumCornerRadiusScale, MaximumCornerRadiusScale);
+    }
+}

LanMountainDesktop.Settings.Core/LanMountainDesktop.Settings.Core.csproj

@@ -0,0 +1,11 @@
+<Project Sdk="Microsoft.NET.Sdk">
+  <PropertyGroup>
+    <TargetFramework>net10.0</TargetFramework>
+    <Nullable>enable</Nullable>
+    <ImplicitUsings>enable</ImplicitUsings>
+  </PropertyGroup>
+  <ItemGroup>
+    <ProjectReference Include="..\LanMountainDesktop.PluginSdk\LanMountainDesktop.PluginSdk.csproj" />
+    <ProjectReference Include="..\LanMountainDesktop.Shared.Contracts\LanMountainDesktop.Shared.Contracts.csproj" />
+  </ItemGroup>
+</Project>

LanMountainDesktop.Shared.Contracts/AppearanceCornerRadiusTokens.cs

@@ -0,0 +1,12 @@
+using Avalonia;
+
+namespace LanMountainDesktop.Shared.Contracts;
+
+public sealed record AppearanceCornerRadiusTokens(
+    CornerRadius Micro,
+    CornerRadius Xs,
+    CornerRadius Sm,
+    CornerRadius Md,
+    CornerRadius Lg,
+    CornerRadius Xl,
+    CornerRadius Island);

LanMountainDesktop.Shared.Contracts/LanMountainDesktop.Shared.Contracts.csproj

@@ -1,11 +1,10 @@
 <Project Sdk="Microsoft.NET.Sdk">
-
   <PropertyGroup>
-    <OutputType>Exe</OutputType>
     <TargetFramework>net10.0</TargetFramework>
-    <ImplicitUsings>enable</ImplicitUsings>
     <Nullable>enable</Nullable>
-    <Version>1.0.0</Version>
+    <ImplicitUsings>enable</ImplicitUsings>
   </PropertyGroup>
-
+  <ItemGroup>
+    <PackageReference Include="Avalonia" Version="11.3.12" />
+  </ItemGroup>
 </Project>

LanMountainDesktop.Tests/BuiltInDesktopHostCornerRadiusBaselineTests.cs

@@ -0,0 +1,43 @@
+using System;
+using Avalonia;
+using LanMountainDesktop.Appearance;
+using LanMountainDesktop.ComponentSystem;
+using LanMountainDesktop.Host.Abstractions;
+using LanMountainDesktop.Views.Components;
+using Xunit;
+
+namespace LanMountainDesktop.Tests;
+
+public sealed class BuiltInDesktopHostCornerRadiusBaselineTests
+{
+    [Theory]
+    [InlineData(80d, 0d)]
+    [InlineData(120d, 1d)]
+    [InlineData(160d, 2.5d)]
+    public void BuiltInDesktopHosts_ResolveToTheUnifiedLgBaseline(double cellSize, double globalScale)
+    {
+        var registry = new DesktopComponentRuntimeRegistry(
+            ComponentRegistry.CreateDefault(),
+            DesktopComponentRuntimeRegistry.GetDefaultRegistrations());
+        var expected = AppearanceCornerRadiusTokenFactory.Create(globalScale).Lg.TopLeft;
+
+        foreach (var descriptor in registry.GetDesktopComponents())
+        {
+            var resolved = descriptor.ResolveCornerRadius(CreateChromeContext(descriptor.Definition.Id, cellSize, globalScale));
+            Assert.Equal(expected, resolved, 3);
+        }
+    }
+
+    private static ComponentChromeContext CreateChromeContext(
+        string componentId,
+        double cellSize,
+        double globalScale)
+    {
+        return new ComponentChromeContext(
+            componentId,
+            null,
+            cellSize,
+            globalScale,
+            AppearanceCornerRadiusTokenFactory.Create(globalScale));
+    }
+}

LanMountainDesktop.Tests/CornerRadiusScaleTests.cs

@@ -0,0 +1,91 @@
+using Avalonia;
+using LanMountainDesktop.PluginSdk;
+using LanMountainDesktop.Settings.Core;
+using LanMountainDesktop.Shared.Contracts;
+using Xunit;
+
+namespace LanMountainDesktop.Tests;
+
+public sealed class CornerRadiusScaleTests
+{
+    [Theory]
+    [InlineData(-1d, 0d)]
+    [InlineData(0d, 0d)]
+    [InlineData(0.33d, 0.33d)]
+    [InlineData(1.234d, 1.234d)]
+    [InlineData(2.5d, 2.5d)]
+    [InlineData(3d, 2.5d)]
+    public void NormalizeCornerRadiusScale_ClampsWithoutSnapping(double input, double expected)
+    {
+        Assert.Equal(expected, GlobalAppearanceSettings.NormalizeCornerRadiusScale(input), 3);
+    }
+
+    [Fact]
+    public void NormalizeCornerRadiusScale_UsesDefaultForInvalidValues()
+    {
+        Assert.Equal(
+            GlobalAppearanceSettings.DefaultCornerRadiusScale,
+            GlobalAppearanceSettings.NormalizeCornerRadiusScale(double.NaN),
+            3);
+        Assert.Equal(
+            GlobalAppearanceSettings.DefaultCornerRadiusScale,
+            GlobalAppearanceSettings.NormalizeCornerRadiusScale(double.PositiveInfinity),
+            3);
+    }
+
+    [Fact]
+    public void PluginDesktopComponentContext_AllowsZeroRadiusScaling()
+    {
+        var appearanceContext = new PluginAppearanceContext(new PluginAppearanceSnapshot(
+            GlobalCornerRadiusScale: 0d,
+            CornerRadiusTokens: PluginCornerRadiusTokens.FromShared(new AppearanceCornerRadiusTokens(
+                new CornerRadius(6),
+                new CornerRadius(10),
+                new CornerRadius(14),
+                new CornerRadius(18),
+                new CornerRadius(24),
+                new CornerRadius(30),
+                new CornerRadius(36))),
+            ThemeVariant: "Unknown"));
+
+        var context = new PluginDesktopComponentContext(
+            new PluginManifest("plugin.id", "Plugin Name", "plugin.dll"),
+            "C:\\Plugins\\plugin.id",
+            "C:\\Data\\plugin.id",
+            new NullServiceProvider(),
+            new Dictionary<string, object?>(),
+            "component-1",
+            null,
+            96d,
+            appearanceContext);
+
+        Assert.Equal(0d, context.GlobalCornerRadiusScale, 3);
+        Assert.Equal(0d, context.ResolveScaledCornerRadius(12d), 3);
+        Assert.Equal(0d, context.ResolveScaledCornerRadius(12d, 8d, 18d), 3);
+    }
+
+    [Fact]
+    public void PluginAppearanceContext_ResolveCornerRadius_DoesNotDoubleScalePresetTokens()
+    {
+        var context = new PluginAppearanceContext(new PluginAppearanceSnapshot(
+            GlobalCornerRadiusScale: 2d,
+            CornerRadiusTokens: new PluginCornerRadiusTokens(
+                Micro: 12d,
+                Xs: 20d,
+                Sm: 28d,
+                Md: 36d,
+                Lg: 48d,
+                Xl: 60d,
+                Island: 72d),
+            ThemeVariant: "Light"));
+
+        Assert.Equal(36d, context.ResolveCornerRadius(PluginCornerRadiusPreset.Md), 3);
+        Assert.Equal(36d, context.ResolveCornerRadius(PluginCornerRadiusPreset.Md, maximum: 40d), 3);
+        Assert.Equal(36d, context.ResolveScaledCornerRadius(18d), 3);
+    }
+
+    private sealed class NullServiceProvider : IServiceProvider
+    {
+        public object? GetService(Type serviceType) => null;
+    }
+}

LanMountainDesktop.Tests/DesktopComponentRuntimeRegistrationCornerRadiusTests.cs

@@ -0,0 +1,58 @@
+using Avalonia;
+using Avalonia.Controls;
+using LanMountainDesktop.Host.Abstractions;
+using LanMountainDesktop.Shared.Contracts;
+using LanMountainDesktop.Views.Components;
+using Xunit;
+
+namespace LanMountainDesktop.Tests;
+
+public sealed class DesktopComponentRuntimeRegistrationCornerRadiusTests
+{
+    [Fact]
+    public void LegacyCellSizeResolver_AppliesGlobalCornerRadiusScale()
+    {
+        var registration = new DesktopComponentRuntimeRegistration(
+            componentId: "test.component",
+            displayNameLocalizationKey: null,
+            controlFactory: () => new Border(),
+            cornerRadiusResolver: cellSize => Math.Clamp(cellSize * 0.30, 10, 40));
+
+        var resolver = Assert.IsType<Func<ComponentChromeContext, double>>(registration.CornerRadiusResolver);
+        var resolved = resolver(CreateChromeContext(cellSize: 120, globalScale: 2.0));
+
+        Assert.Equal(72.0, resolved, 3);
+    }
+
+    [Fact]
+    public void ChromeContextResolver_IsNotDoubleScaledByRegistrationWrapper()
+    {
+        var registration = new DesktopComponentRuntimeRegistration(
+            componentId: "test.component",
+            displayNameLocalizationKey: null,
+            controlFactory: _ => new Border(),
+            cornerRadiusResolver: chromeContext => chromeContext.CellSize + chromeContext.GlobalCornerRadiusScale);
+
+        var resolver = Assert.IsType<Func<ComponentChromeContext, double>>(registration.CornerRadiusResolver);
+        var resolved = resolver(CreateChromeContext(cellSize: 50, globalScale: 2.5));
+
+        Assert.Equal(52.5, resolved, 3);
+    }
+
+    private static ComponentChromeContext CreateChromeContext(double cellSize, double globalScale)
+    {
+        return new ComponentChromeContext(
+            ComponentId: "test.component",
+            PlacementId: null,
+            CellSize: cellSize,
+            GlobalCornerRadiusScale: globalScale,
+            CornerRadiusTokens: new AppearanceCornerRadiusTokens(
+                new CornerRadius(6),
+                new CornerRadius(10),
+                new CornerRadius(14),
+                new CornerRadius(18),
+                new CornerRadius(24),
+                new CornerRadius(30),
+                new CornerRadius(36)));
+    }
+}

LanMountainDesktop.Tests/InfoRecommendationHostCornerRadiusTests.cs

@@ -0,0 +1,73 @@
+using System.Collections.Generic;
+using LanMountainDesktop.Appearance;
+using LanMountainDesktop.ComponentSystem;
+using LanMountainDesktop.Host.Abstractions;
+using LanMountainDesktop.Views.Components;
+using Xunit;
+
+namespace LanMountainDesktop.Tests;
+
+public sealed class InfoRecommendationHostCornerRadiusTests
+{
+    private static readonly string[] WideInfoComponentIds =
+    [
+        BuiltInComponentIds.DesktopDailyPoetry,
+        BuiltInComponentIds.DesktopDailyArtwork,
+        BuiltInComponentIds.DesktopDailyWord,
+        BuiltInComponentIds.DesktopCnrDailyNews,
+        BuiltInComponentIds.DesktopIfengNews,
+        BuiltInComponentIds.DesktopBilibiliHotSearch,
+        BuiltInComponentIds.DesktopBaiduHotSearch,
+        BuiltInComponentIds.DesktopStcn24Forum
+    ];
+
+    [Theory]
+    [InlineData(80d)]
+    [InlineData(120d)]
+    [InlineData(160d)]
+    public void InfoHostRegistrations_ResolveToTheUnifiedLgBaseline(double cellSize)
+    {
+        var registry = new DesktopComponentRuntimeRegistry(
+            ComponentRegistry.CreateDefault(),
+            DesktopComponentRuntimeRegistry.GetDefaultRegistrations());
+
+        foreach (var componentId in WideInfoComponentIds)
+        {
+            AssertResolved(registry, componentId, cellSize);
+        }
+
+        AssertResolved(registry, BuiltInComponentIds.DesktopDailyWord2x2, cellSize);
+    }
+
+    private static void AssertResolved(
+        DesktopComponentRuntimeRegistry registry,
+        string componentId,
+        double cellSize)
+    {
+        Assert.True(
+            registry.TryGetDescriptor(componentId, out var descriptor),
+            $"Missing runtime registration for '{componentId}'.");
+
+        var zero = descriptor.ResolveCornerRadius(CreateChromeContext(componentId, cellSize, 0d));
+        var unit = descriptor.ResolveCornerRadius(CreateChromeContext(componentId, cellSize, 1d));
+        var max = descriptor.ResolveCornerRadius(CreateChromeContext(componentId, cellSize, 2.5d));
+
+        Assert.Equal(0d, zero, 3);
+        Assert.Equal(24d, unit, 3);
+        Assert.Equal(60d, max, 3);
+        Assert.True(zero <= unit && unit <= max);
+    }
+
+    private static ComponentChromeContext CreateChromeContext(
+        string componentId,
+        double cellSize,
+        double globalScale)
+    {
+        return new ComponentChromeContext(
+            componentId,
+            null,
+            cellSize,
+            globalScale,
+            AppearanceCornerRadiusTokenFactory.Create(globalScale));
+    }
+}

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.slnx

@@ -1,5 +1,10 @@
 <Solution>
-  <Project Path="LanAirApp/tools/LanMountainDesktop.PluginPackager/LanMountainDesktop.PluginPackager.csproj" />
+  <Project Path="LanMountainDesktop.Host.Abstractions/LanMountainDesktop.Host.Abstractions.csproj" />
+  <Project Path="LanMountainDesktop.Shared.Contracts/LanMountainDesktop.Shared.Contracts.csproj" />
+  <Project Path="LanMountainDesktop.Settings.Core/LanMountainDesktop.Settings.Core.csproj" />
+  <Project Path="LanMountainDesktop.Appearance/LanMountainDesktop.Appearance.csproj" />
+  <Project Path="LanMountainDesktop.DesktopComponents.Runtime/LanMountainDesktop.DesktopComponents.Runtime.csproj" />
+  <Project Path="LanMountainDesktop.DesktopHost/LanMountainDesktop.DesktopHost.csproj" />
   <Project Path="LanMountainDesktop.PluginSdk/LanMountainDesktop.PluginSdk.csproj" />
   <Project Path="LanMountainDesktop.PluginsInstallHelper/LanMountainDesktop.PluginsInstallHelper.csproj" />
   <Project Path="LanMountainDesktop/LanMountainDesktop.csproj" />

LanMountainDesktop/App.axaml.cs

@@ -15,6 +15,7 @@ using Avalonia.Styling;
 using Avalonia.Threading;
 using AvaloniaWebView;
 using LanMountainDesktop.ComponentSystem;
+using LanMountainDesktop.DesktopHost;
 using LanMountainDesktop.Models;
 using LanMountainDesktop.PluginSdk;
 using LanMountainDesktop.Services;
@@ -61,6 +62,7 @@ public partial class App : Application
     private MainWindow? _mainWindow;
     private bool _mainWindowClosed;
     private bool _uiUnhandledExceptionHooked;
+    private DesktopShellHost? _desktopShellHost;
 
     internal static SingleInstanceService? CurrentSingleInstanceService { get; set; }
     internal static (UserBehaviorAnalyticsService?, CrashReportService?) AnalyticsServices { get; set; }
@@ -116,28 +118,32 @@ public partial class App : Application
         AppLogger.Info("App", "Framework initialization completed.");
         RegisterUiUnhandledExceptionGuard();
         LinuxDesktopEntryInstaller.EnsureInstalled();
-        InitializePluginRuntime();
+        DesktopBootstrap.InitializeApplication(this, InitializeDesktopShell);
-        InitializeTrayIcon();
 
-        if (ApplicationLifetime is IClassicDesktopStyleApplicationLifetime desktop)
+        base.OnFrameworkInitializationCompleted();
-        {
+    }
-            // Avoid duplicate validations from both Avalonia and the CommunityToolkit.
+
-            // More info: https://docs.avaloniaui.net/docs/guides/development-guides/data-validation#manage-validationplugins
+    private void InitializeDesktopShell()
-            DisableAvaloniaDataAnnotationValidation();
+    {
-            desktop.ShutdownMode = Avalonia.Controls.ShutdownMode.OnExplicitShutdown;
+        _desktopShellHost ??= new DesktopShellHost(
-            desktop.Exit += (_, _) =>
+            InitializePluginRuntime,
+            InitializeTrayIcon,
+            desktop =>
+            {
+                // Avoid duplicate validations from both Avalonia and the CommunityToolkit.
+                // More info: https://docs.avaloniaui.net/docs/guides/development-guides/data-validation#manage-validationplugins
+                DisableAvaloniaDataAnnotationValidation();
+                desktop.ShutdownMode = Avalonia.Controls.ShutdownMode.OnExplicitShutdown;
+                CreateAndAssignMainWindow(desktop, "FrameworkInitialization");
+            },
+            () =>
             {
                 AppLogger.Info("App", "Desktop lifetime exit triggered.");
                 PerformExitCleanup();
-            };
+            },
-
+            () => CurrentSingleInstanceService?.StartActivationListener(ActivateMainWindow),
-            CreateAndAssignMainWindow(desktop, "FrameworkInitialization");
+            StartWeatherLocationRefreshIfNeeded);
-            CurrentSingleInstanceService?.StartActivationListener(ActivateMainWindow);
+        _desktopShellHost.Initialize(this);
-        }
-
-        StartWeatherLocationRefreshIfNeeded();
-
-        base.OnFrameworkInitializationCompleted();
     }
 
     private void OnTrayExitClick(object? sender, EventArgs e)
@@ -493,6 +499,7 @@ public partial class App : Application
                 refreshAll ||
                 changedKeys.Contains(nameof(AppSettingsSnapshot.IsNightMode), StringComparer.OrdinalIgnoreCase) ||
                 changedKeys.Contains(nameof(AppSettingsSnapshot.UseSystemChrome), StringComparer.OrdinalIgnoreCase) ||
+                changedKeys.Contains(nameof(AppSettingsSnapshot.GlobalCornerRadiusScale), StringComparer.OrdinalIgnoreCase) ||
                 (string.Equals(liveAppearance.ThemeColorMode, ThemeAppearanceValues.ColorModeSeedMonet, StringComparison.OrdinalIgnoreCase) &&
                  changedKeys.Contains(nameof(AppSettingsSnapshot.ThemeColor), StringComparer.OrdinalIgnoreCase)) ||
                 (string.Equals(liveAppearance.ThemeColorMode, ThemeAppearanceValues.ColorModeWallpaperMonet, StringComparison.OrdinalIgnoreCase) &&

LanMountainDesktop/ComponentSystem/DesktopComponentRuntimeContext.cs

@@ -1,3 +1,4 @@
+using LanMountainDesktop.Host.Abstractions;
 using LanMountainDesktop.PluginSdk;
 using LanMountainDesktop.Services;
 using LanMountainDesktop.Services.Settings;
@@ -10,5 +11,6 @@ public sealed record DesktopComponentRuntimeContext(
     ISettingsFacadeService SettingsFacade,
     ISettingsService SettingsService,
     IAppearanceThemeService AppearanceTheme,
+    ComponentChromeContext Chrome,
     IComponentSettingsAccessor ComponentSettingsAccessor,
     IComponentInstanceSettingsStore ComponentSettingsStore);

LanMountainDesktop/ComponentSystem/IComponentChromeContextAware.cs

@@ -0,0 +1,8 @@
+using LanMountainDesktop.Host.Abstractions;
+
+namespace LanMountainDesktop.ComponentSystem;
+
+public interface IComponentChromeContextAware
+{
+    void SetComponentChromeContext(ComponentChromeContext context);
+}

LanMountainDesktop/LanMountainDesktop.csproj

@@ -29,6 +29,12 @@
   </ItemGroup>
 
   <ItemGroup>
+    <ProjectReference Include="..\LanMountainDesktop.Host.Abstractions\LanMountainDesktop.Host.Abstractions.csproj" />
+    <ProjectReference Include="..\LanMountainDesktop.Shared.Contracts\LanMountainDesktop.Shared.Contracts.csproj" />
+    <ProjectReference Include="..\LanMountainDesktop.Settings.Core\LanMountainDesktop.Settings.Core.csproj" />
+    <ProjectReference Include="..\LanMountainDesktop.Appearance\LanMountainDesktop.Appearance.csproj" />
+    <ProjectReference Include="..\LanMountainDesktop.DesktopComponents.Runtime\LanMountainDesktop.DesktopComponents.Runtime.csproj" />
+    <ProjectReference Include="..\LanMountainDesktop.DesktopHost\LanMountainDesktop.DesktopHost.csproj" />
     <ProjectReference Include="..\LanMountainDesktop.PluginSdk\LanMountainDesktop.PluginSdk.csproj" />
     <ProjectReference Include="..\LanMountainDesktop.PluginsInstallHelper\LanMountainDesktop.PluginsInstallHelper.csproj" ReferenceOutputAssembly="false" />
   </ItemGroup>

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",
@@ -20,7 +25,7 @@
     "settings.nav.group_system":  "System",
     "settings.nav.group_extensions":  "Extensions",
     "settings.nav.wallpaper":  "Wallpaper",
-    "settings.nav.grid":  "Grid",
+    "settings.nav.grid":  "Components",
     "settings.nav.color":  "Color",
     "settings.nav.status_bar":  "Status Bar",
     "settings.nav.weather":  "Weather",
@@ -298,8 +303,17 @@
     "settings.status_bar.clock_format.hm":  "Hour:Minute",
     "settings.status_bar.clock_format.hms":  "Hour:Minute:Second",
     "settings.components.title":  "Components",
-    "settings.components.description":  "Adjust desktop grid density and widget placement.",
+    "settings.components.description":  "Adjust component layout and corner design.",
-    "settings.components.grid_header":  "Grid Layout",
+    "settings.components.grid_header":  "Grid Settings",
+    "settings.components.header":  "Grid Settings",
+    "settings.components.short_side_label":  "Short Side Cells",
+    "settings.components.edge_inset_label":  "Screen Inset",
+    "settings.components.spacing_label":  "Component Spacing",
+    "settings.components.spacing_compact":  "Compact",
+    "settings.components.spacing_relaxed":  "Relaxed",
+    "settings.components.corner_radius.header":  "Corner Design",
+    "settings.components.corner_radius.label":  "Component Corner Radius",
+    "settings.components.corner_radius.description":  "Adjust the shared corner radius from a square edge to a capsule-like shape, and expand the internal safe area with it.",
     "settings.update.title":  "Update",
     "settings.update.current_version_label":  "Current Version",
     "settings.update.latest_version_label":  "Latest Release",
@@ -405,6 +419,7 @@
     "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.",
@@ -590,6 +605,18 @@
     "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",

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",
@@ -20,7 +25,7 @@
     "settings.nav.group_system":  "系统",
     "settings.nav.group_extensions":  "扩展",
     "settings.nav.wallpaper":  "壁纸",
-    "settings.nav.grid":  "网格",
+    "settings.nav.grid":  "组件",
     "settings.nav.color":  "颜色",
     "settings.nav.status_bar":  "状态栏",
     "settings.nav.weather":  "天气",
@@ -296,9 +301,18 @@
     "settings.status_bar.clock_format_label":  "时钟格式",
     "settings.status_bar.clock_format.hm":  "时:分",
     "settings.status_bar.clock_format.hms":  "时:分:秒",
-    "settings.components.title":  "网格",
+    "settings.components.title":  "组件",
-    "settings.components.description":  "调整桌面网格与布局。",
+    "settings.components.description":  "调整组件布局与圆角设计。",
-    "settings.components.grid_header":  "网格布局",
+    "settings.components.grid_header":  "网格设置",
+    "settings.components.header":  "网格设置",
+    "settings.components.short_side_label":  "短边格数",
+    "settings.components.edge_inset_label":  "屏幕边距",
+    "settings.components.spacing_label":  "组件间距",
+    "settings.components.spacing_compact":  "紧凑",
+    "settings.components.spacing_relaxed":  "宽松",
+    "settings.components.corner_radius.header":  "圆角设计",
+    "settings.components.corner_radius.label":  "组件圆角",
+    "settings.components.corner_radius.description":  "将组件容器圆角从直角连续调到接近胶囊的形态，并随圆角增大同步扩展内部安全区。",
     "settings.update.title":  "更新",
     "settings.update.current_version_label":  "当前版本",
     "settings.update.latest_version_label":  "最新发布",
@@ -403,6 +417,7 @@
     "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。",
@@ -588,6 +603,18 @@
     "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",

LanMountainDesktop/Models/AppSettingsSnapshot.cs

@@ -1,4 +1,5 @@
 using System.Collections.Generic;
+using LanMountainDesktop.Settings.Core;
 
 namespace LanMountainDesktop.Models;
 
@@ -16,6 +17,8 @@ public sealed class AppSettingsSnapshot
 
     public bool UseSystemChrome { get; set; }
 
+    public double GlobalCornerRadiusScale { get; set; } = GlobalAppearanceSettings.DefaultCornerRadiusScale;
+
     public string ThemeColorMode { get; set; } = "default_neutral";
 
     public string SystemMaterialMode { get; set; } = "none";

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

@@ -4,6 +4,7 @@ using System.Threading;
 using System.Threading.Tasks;
 using Avalonia;
 using Avalonia.WebView.Desktop;
+using LanMountainDesktop.DesktopHost;
 using LanMountainDesktop.Models;
 using LanMountainDesktop.Services;
 using LanMountainDesktop.Services.Settings;
@@ -20,9 +21,11 @@ sealed class Program
     {
         AppLogger.Initialize();
         RegisterGlobalExceptionLogging();
-        InitializeDeviceId();
+        DesktopBootstrap.InitializeStartupServices(
-        InitializeCrashReporting();
+            InitializeDeviceId,
-        InitializeUserBehaviorAnalytics();
+            InitializeCrashReporting,
+            InitializeUserBehaviorAnalytics,
+            ScheduleWhiteboardNoteStartupCleanup);
         var restartParentProcessId = AppRestartService.TryGetRestartParentProcessId(args);
 
         using var singleInstance = AcquireSingleInstance(restartParentProcessId);
@@ -88,6 +91,25 @@ 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/AppearanceThemeService.cs

@@ -11,9 +11,12 @@ using Avalonia.Media;
 using Avalonia.Styling;
 using Avalonia.Threading;
 using Avalonia.Media.Imaging;
+using LanMountainDesktop.Appearance;
 using LanMountainDesktop.Models;
 using LanMountainDesktop.PluginSdk;
 using LanMountainDesktop.Services.Settings;
+using LanMountainDesktop.Settings.Core;
+using LanMountainDesktop.Shared.Contracts;
 using LanMountainDesktop.Theme;
 using Microsoft.Win32;
 
@@ -41,6 +44,8 @@ public sealed record AppearanceThemeSnapshot(
     string ThemeColorMode,
     string? UserThemeColor,
     string? SelectedWallpaperSeed,
+    double GlobalCornerRadiusScale,
+    AppearanceCornerRadiusTokens CornerRadiusTokens,
     string ResolvedSeedSource,
     MonetPalette MonetPalette,
     Color AccentColor,
@@ -464,6 +469,13 @@ internal sealed class AppearanceThemeService : IAppearanceThemeService, IDisposa
         var context = CreateThemeContext(snapshot);
         ThemeColorSystemService.ApplyThemeResources(resources, context);
         GlassEffectService.ApplyGlassResources(resources, context);
+        resources["DesignCornerRadiusMicro"] = snapshot.CornerRadiusTokens.Micro;
+        resources["DesignCornerRadiusXs"] = snapshot.CornerRadiusTokens.Xs;
+        resources["DesignCornerRadiusSm"] = snapshot.CornerRadiusTokens.Sm;
+        resources["DesignCornerRadiusMd"] = snapshot.CornerRadiusTokens.Md;
+        resources["DesignCornerRadiusLg"] = snapshot.CornerRadiusTokens.Lg;
+        resources["DesignCornerRadiusXl"] = snapshot.CornerRadiusTokens.Xl;
+        resources["DesignCornerRadiusIsland"] = snapshot.CornerRadiusTokens.Island;
     }
 
     public AppearanceMaterialSurface GetMaterialSurface(MaterialSurfaceRole role)
@@ -538,6 +550,7 @@ internal sealed class AppearanceThemeService : IAppearanceThemeService, IDisposa
         if (!refreshAll &&
             !changedKeys.Contains(nameof(AppSettingsSnapshot.IsNightMode), StringComparer.OrdinalIgnoreCase) &&
             !changedKeys.Contains(nameof(AppSettingsSnapshot.UseSystemChrome), StringComparer.OrdinalIgnoreCase) &&
+            !changedKeys.Contains(nameof(AppSettingsSnapshot.GlobalCornerRadiusScale), StringComparer.OrdinalIgnoreCase) &&
             !(respondsToThemeColor &&
               changedKeys.Contains(nameof(AppSettingsSnapshot.ThemeColor), StringComparer.OrdinalIgnoreCase)) &&
             !(respondsToWallpaper &&
@@ -559,6 +572,8 @@ internal sealed class AppearanceThemeService : IAppearanceThemeService, IDisposa
         bool queueWallpaperPaletteBuild)
     {
         var availableModes = _windowMaterialService.GetAvailableModes();
+        var globalCornerRadiusScale = GlobalAppearanceSettings.NormalizeCornerRadiusScale(themeState.GlobalCornerRadiusScale);
+        var cornerRadiusTokens = AppearanceCornerRadiusTokenFactory.Create(globalCornerRadiusScale);
         MonetPalette palette;
         IReadOnlyList<Color> wallpaperSeedCandidates;
         Color effectiveSeedColor;
@@ -598,6 +613,8 @@ internal sealed class AppearanceThemeService : IAppearanceThemeService, IDisposa
             themeColorMode,
             themeState.ThemeColor,
             selectedWallpaperSeed,
+            globalCornerRadiusScale,
+            cornerRadiusTokens,
             resolvedSeedSource,
             palette,
             ResolveAccentColor(themeColorMode, themeState.ThemeColor, palette),

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

@@ -75,6 +75,15 @@ public static class DesktopComponentEditorRegistryFactory
             [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/DesktopComponentRegistryFactory.cs

@@ -9,6 +9,7 @@ using Avalonia.Layout;
 using Avalonia.Media;
 using LanMountainDesktop.ComponentSystem;
 using LanMountainDesktop.ComponentSystem.Extensions;
+using LanMountainDesktop.Host.Abstractions;
 using LanMountainDesktop.PluginSdk;
 using LanMountainDesktop.Services.Settings;
 using LanMountainDesktop.Views.Components;
@@ -62,7 +63,11 @@ public static class DesktopComponentRegistryFactory
                     registration.ComponentId,
                     registration.DisplayNameLocalizationKey,
                     factoryContext => CreatePluginControl(contribution, factoryContext),
-                    registration.CornerRadiusResolver));
+                    chromeContext =>
+                    {
+                        var appearanceContext = CreatePluginAppearanceContext(chromeContext);
+                        return registration.ResolveCornerRadius(appearanceContext, chromeContext.CellSize);
+                    }));
             }
         }
 
@@ -122,6 +127,11 @@ public static class DesktopComponentRegistryFactory
             var pluginSettings = new PluginScopedSettingsService(
                 contribution.Plugin.Manifest.Id,
                 settingsService);
+            var appearanceSnapshot = HostAppearanceThemeProvider.GetOrCreate().GetCurrent();
+            var pluginAppearance = new PluginAppearanceContext(new PluginAppearanceSnapshot(
+                GlobalCornerRadiusScale: appearanceSnapshot.GlobalCornerRadiusScale,
+                CornerRadiusTokens: PluginCornerRadiusTokens.FromShared(appearanceSnapshot.CornerRadiusTokens),
+                ThemeVariant: appearanceSnapshot.IsNightMode ? "Dark" : "Light"));
             var pluginContext = new PluginDesktopComponentContext(
                 contribution.Plugin.Manifest,
                 contribution.Plugin.Context.PluginDirectory,
@@ -131,6 +141,7 @@ public static class DesktopComponentRegistryFactory
                 contribution.Registration.ComponentId,
                 context.PlacementId,
                 context.CellSize,
+                pluginAppearance,
                 pluginSettings);
 
             return contribution.Registration.ControlFactory(contribution.Plugin.Services, pluginContext);
@@ -143,6 +154,14 @@ public static class DesktopComponentRegistryFactory
         }
     }
 
+    private static IPluginAppearanceContext CreatePluginAppearanceContext(ComponentChromeContext chromeContext)
+    {
+        return new PluginAppearanceContext(new PluginAppearanceSnapshot(
+            GlobalCornerRadiusScale: chromeContext.GlobalCornerRadiusScale,
+            CornerRadiusTokens: PluginCornerRadiusTokens.FromShared(chromeContext.CornerRadiusTokens),
+            ThemeVariant: "Unknown"));
+    }
+
     private static Control CreatePluginErrorControl(
         PluginDesktopComponentContribution contribution,
         Exception exception)

LanMountainDesktop/Services/IComponentLibraryService.cs

@@ -20,6 +20,7 @@ public sealed record ComponentLibraryCategoryEntry(
 
 public sealed record ComponentLibraryCreateContext(
     double CellSize,
+    double GlobalCornerRadiusScale,
     TimeZoneService TimeZoneService,
     IWeatherInfoService WeatherInfoService,
     IRecommendationInfoService RecommendationInfoService,

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

@@ -9,6 +9,7 @@ using System.Runtime.Versioning;
 using System.Text;
 using System.Text.RegularExpressions;
 using System.Threading;
+using LanMountainDesktop.Models;
 using Microsoft.Win32;
 using MudTools.OfficeInterop;
 using MudTools.OfficeInterop.Excel;
@@ -18,7 +19,7 @@ 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);
 }
 
@@ -48,20 +49,38 @@ public sealed class OfficeRecentDocumentsService : IOfficeRecentDocumentsService
         @"\[T(?<filetime>[0-9A-F]+)\]",
         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);
 
-        if (!OperatingSystem.IsWindows())
+        if (!OperatingSystem.IsWindows() || normalizedSources.Count == 0)
         {
             return documents;
         }
 
-        TryGetFromRegistry(documents);
+        var useRegistry = normalizedSources.Contains(OfficeRecentDocumentSourceTypes.Registry, StringComparer.OrdinalIgnoreCase);
-        TryGetFromRecentFolders(documents);
+        var useRecentFolders = normalizedSources.Contains(OfficeRecentDocumentSourceTypes.RecentFolders, StringComparer.OrdinalIgnoreCase);
-        TryGetFromJumpLists(documents);
+        var useJumpLists = normalizedSources.Contains(OfficeRecentDocumentSourceTypes.JumpLists, StringComparer.OrdinalIgnoreCase);
 
-        if (documents.Count < maxCount)
+        if (useRegistry)
+        {
+            TryGetFromRegistry(documents);
+        }
+
+        if (useRecentFolders)
+        {
+            TryGetFromRecentFolders(documents);
+        }
+
+        if (useJumpLists)
+        {
+            TryGetFromJumpLists(documents);
+        }
+
+        if (useRegistry && documents.Count < maxCount)
         {
             TryGetFromMudToolsInterop(documents);
         }

LanMountainDesktop/Services/Settings/SettingsCatalogService.cs

@@ -17,7 +17,7 @@ internal sealed class SettingsCatalogService : ISettingsCatalog
         [
             new SettingsSectionDefinition("general", SettingsCategories.General, SettingsScope.App, "settings.general.title", iconKey: "Settings", sortOrder: 0),
             new SettingsSectionDefinition("appearance", SettingsCategories.Appearance, SettingsScope.App, "settings.appearance.title", iconKey: "DesignIdeas", sortOrder: 10),
-            new SettingsSectionDefinition("components", SettingsCategories.Components, SettingsScope.ComponentInstance, "settings.components.title", iconKey: "GridDots", sortOrder: 20),
+            new SettingsSectionDefinition("components", SettingsCategories.Components, SettingsScope.ComponentInstance, "settings.components.title", iconKey: "Apps", sortOrder: 20),
             new SettingsSectionDefinition("plugins", SettingsCategories.Plugins, SettingsScope.Plugin, "settings.plugins.title", iconKey: "PuzzlePiece", sortOrder: 30),
             new SettingsSectionDefinition("about", SettingsCategories.About, SettingsScope.App, "settings.about.title", iconKey: "Info", sortOrder: 40)
         ]);

LanMountainDesktop/Services/Settings/SettingsContracts.cs

@@ -5,6 +5,7 @@ using System.Threading.Tasks;
 using LanMountainDesktop.Models;
 using LanMountainDesktop.PluginSdk;
 using LanMountainDesktop.Services;
+using LanMountainDesktop.Settings.Core;
 
 namespace LanMountainDesktop.Services.Settings;
 
@@ -20,6 +21,7 @@ public sealed record ThemeAppearanceSettingsState(
     bool IsNightMode,
     string? ThemeColor,
     bool UseSystemChrome,
+    double GlobalCornerRadiusScale = GlobalAppearanceSettings.DefaultCornerRadiusScale,
     string ThemeColorMode = ThemeAppearanceValues.ColorModeDefaultNeutral,
     string SystemMaterialMode = ThemeAppearanceValues.MaterialNone,
     string? SelectedWallpaperSeed = null);

LanMountainDesktop/Services/Settings/SettingsDomainServices.cs

@@ -10,6 +10,7 @@ using Avalonia.Media.Imaging;
 using LanMountainDesktop.Models;
 using LanMountainDesktop.PluginSdk;
 using LanMountainDesktop.Services;
+using LanMountainDesktop.Settings.Core;
 using LanMountainDesktop.Services.PluginMarket;
 
 namespace LanMountainDesktop.Services.Settings;
@@ -242,6 +243,7 @@ internal sealed class ThemeAppearanceService : IThemeAppearanceService
             snapshot.IsNightMode ?? false,
             snapshot.ThemeColor,
             snapshot.UseSystemChrome,
+            GlobalAppearanceSettings.NormalizeCornerRadiusScale(snapshot.GlobalCornerRadiusScale),
             ThemeAppearanceValues.NormalizeThemeColorMode(snapshot.ThemeColorMode, snapshot.ThemeColor),
             ThemeAppearanceValues.NormalizeSystemMaterialMode(snapshot.SystemMaterialMode),
             snapshot.SelectedWallpaperSeed);
@@ -252,6 +254,7 @@ internal sealed class ThemeAppearanceService : IThemeAppearanceService
         var snapshot = _settingsService.Load();
         var changedKeys = new List<string>();
         var normalizedThemeColor = string.IsNullOrWhiteSpace(state.ThemeColor) ? null : state.ThemeColor;
+        var normalizedCornerRadiusScale = GlobalAppearanceSettings.NormalizeCornerRadiusScale(state.GlobalCornerRadiusScale);
         var normalizedThemeColorMode = ThemeAppearanceValues.NormalizeThemeColorMode(state.ThemeColorMode, state.ThemeColor);
         var normalizedSystemMaterialMode = ThemeAppearanceValues.NormalizeSystemMaterialMode(state.SystemMaterialMode);
         var normalizedSelectedWallpaperSeed = string.IsNullOrWhiteSpace(state.SelectedWallpaperSeed)
@@ -276,6 +279,12 @@ internal sealed class ThemeAppearanceService : IThemeAppearanceService
             changedKeys.Add(nameof(AppSettingsSnapshot.UseSystemChrome));
         }
 
+        if (Math.Abs(GlobalAppearanceSettings.NormalizeCornerRadiusScale(snapshot.GlobalCornerRadiusScale) - normalizedCornerRadiusScale) > 0.0001d)
+        {
+            snapshot.GlobalCornerRadiusScale = normalizedCornerRadiusScale;
+            changedKeys.Add(nameof(AppSettingsSnapshot.GlobalCornerRadiusScale));
+        }
+
         if (!string.Equals(snapshot.ThemeColorMode, normalizedThemeColorMode, StringComparison.OrdinalIgnoreCase))
         {
             snapshot.ThemeColorMode = normalizedThemeColorMode;

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

@@ -18,7 +18,7 @@
         <Setter Property="Background" Value="{DynamicResource EditorSelectFieldBackgroundBrush}" />
         <Setter Property="BorderBrush" Value="{DynamicResource EditorSelectOutlineBrush}" />
         <Setter Property="BorderThickness" Value="1" />
-        <Setter Property="CornerRadius" Value="18" />
+        <Setter Property="CornerRadius" Value="{DynamicResource DesignCornerRadiusMd}" />
         <Setter Property="Padding" Value="16,14,12,14" />
         <Setter Property="MinHeight" Value="56" />
         <Setter Property="FontSize" Value="14" />
@@ -40,7 +40,7 @@
         <Setter Property="Background" Value="{DynamicResource EditorSelectFieldBackgroundBrush}" />
         <Setter Property="BorderBrush" Value="{DynamicResource EditorSelectOutlineBrush}" />
         <Setter Property="BorderThickness" Value="1" />
-        <Setter Property="CornerRadius" Value="18" />
+        <Setter Property="CornerRadius" Value="{DynamicResource DesignCornerRadiusMd}" />
         <Setter Property="Padding" Value="16,14,12,14" />
         <Setter Property="MinHeight" Value="56" />
         <Setter Property="Foreground" Value="{DynamicResource ComponentEditorPrimaryTextBrush}" />
@@ -61,7 +61,7 @@
         <Setter Property="Background" Value="Transparent" />
         <Setter Property="Padding" Value="16,12" />
         <Setter Property="Margin" Value="6,4" />
-        <Setter Property="CornerRadius" Value="14" />
+        <Setter Property="CornerRadius" Value="{DynamicResource DesignCornerRadiusSm}" />
         <Setter Property="MinHeight" Value="44" />
     </Style>
 
@@ -100,7 +100,7 @@
         <Setter Property="Background" Value="{DynamicResource EditorSurfaceContainerHighBrush}" />
         <Setter Property="BorderBrush" Value="{DynamicResource EditorSelectOutlineBrush}" />
         <Setter Property="BorderThickness" Value="1" />
-        <Setter Property="CornerRadius" Value="20" />
+        <Setter Property="CornerRadius" Value="{DynamicResource DesignCornerRadiusLg}" />
         <Setter Property="Padding" Value="4" />
     </Style>
 
@@ -108,7 +108,7 @@
         <Setter Property="Background" Value="Transparent" />
         <Setter Property="BorderBrush" Value="Transparent" />
         <Setter Property="BorderThickness" Value="0" />
-        <Setter Property="CornerRadius" Value="16" />
+        <Setter Property="CornerRadius" Value="{DynamicResource DesignCornerRadiusSm}" />
         <Setter Property="Padding" Value="18,12" />
         <Setter Property="MinHeight" Value="48" />
         <Setter Property="FontSize" Value="14" />
@@ -139,14 +139,14 @@
         <Setter Property="Background" Value="{DynamicResource ComponentEditorHeroBackgroundBrush}" />
         <Setter Property="BorderBrush" Value="{DynamicResource ComponentEditorCardBorderBrush}" />
         <Setter Property="BorderThickness" Value="1" />
-        <Setter Property="CornerRadius" Value="28" />
+        <Setter Property="CornerRadius" Value="{DynamicResource DesignCornerRadiusXl}" />
     </Style>
 
     <Style Selector="Border.component-editor-card">
         <Setter Property="Background" Value="{DynamicResource ComponentEditorCardBackgroundBrush}" />
         <Setter Property="BorderBrush" Value="{DynamicResource ComponentEditorCardBorderBrush}" />
         <Setter Property="BorderThickness" Value="1" />
-        <Setter Property="CornerRadius" Value="24" />
+        <Setter Property="CornerRadius" Value="{DynamicResource DesignCornerRadiusLg}" />
     </Style>
 
     <Style Selector="TextBlock.component-editor-headline">

LanMountainDesktop/Styles/GlassModule.axaml

@@ -4,11 +4,13 @@
 
     <Styles.Resources>
         <!-- Unified corner radius tokens used across settings and widget panels -->
+        <CornerRadius x:Key="DesignCornerRadiusMicro">6</CornerRadius>
         <CornerRadius x:Key="DesignCornerRadiusXl">32</CornerRadius>
         <CornerRadius x:Key="DesignCornerRadiusLg">28</CornerRadius>
         <CornerRadius x:Key="DesignCornerRadiusMd">20</CornerRadius>
         <CornerRadius x:Key="DesignCornerRadiusSm">14</CornerRadius>
         <CornerRadius x:Key="DesignCornerRadiusXs">12</CornerRadius>
+        <CornerRadius x:Key="DesignCornerRadiusIsland">36</CornerRadius>
     </Styles.Resources>
 
     <Style Selector="TextBlock">
@@ -19,7 +21,7 @@
         <Setter Property="Background" Value="{DynamicResource AdaptiveButtonBackgroundBrush}" />
         <Setter Property="BorderThickness" Value="1" />
         <Setter Property="BorderBrush" Value="{DynamicResource AdaptiveButtonBorderBrush}" />
-        <Setter Property="CornerRadius" Value="20" />
+        <Setter Property="CornerRadius" Value="{DynamicResource DesignCornerRadiusMd}" />
         <Setter Property="Foreground" Value="{DynamicResource AdaptiveTextPrimaryBrush}" />
         <Setter Property="FontSize" Value="14" />
         <Setter Property="Padding" Value="16,10" />
@@ -155,7 +157,7 @@
 
     <Style Selector="Button.swatch-button">
         <Setter Property="BorderThickness" Value="0" />
-        <Setter Property="CornerRadius" Value="16" />
+        <Setter Property="CornerRadius" Value="{DynamicResource DesignCornerRadiusXs}" />
         <Setter Property="Opacity" Value="0.88" />
     </Style>
 
@@ -165,29 +167,35 @@
         <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" />
-        <Setter Property="CornerRadius" Value="28" />
+        <Setter Property="CornerRadius" Value="{DynamicResource DesignCornerRadiusLg}" />
         <Setter Property="Opacity" Value="{DynamicResource AdaptiveGlassPanelOpacity}" />
         <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" />
-        <Setter Property="CornerRadius" Value="32" />
+        <Setter Property="CornerRadius" Value="{DynamicResource DesignCornerRadiusXl}" />
         <Setter Property="Opacity" Value="{DynamicResource AdaptiveGlassStrongOpacity}" />
         <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" />
-        <Setter Property="CornerRadius" Value="36" />
+        <Setter Property="CornerRadius" Value="{DynamicResource DesignCornerRadiusIsland}" />
         <Setter Property="Opacity" Value="{DynamicResource AdaptiveGlassStrongOpacity}" />
         <Setter Property="BoxShadow" Value="0 12 32 #33000000" />
         <Setter Property="Transitions">
@@ -197,19 +205,26 @@
         </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" />
+        <Setter Property="CornerRadius" Value="{DynamicResource DesignCornerRadiusIsland}" />
         <Setter Property="Opacity" Value="{DynamicResource AdaptiveGlassStrongOpacity}" />
         <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/Styles/SettingsCardStyles.axaml

@@ -48,21 +48,21 @@
     </Style>
 
     <Style Selector="Border.settings-section-card">
-        <Setter Property="CornerRadius" Value="18" />
+        <Setter Property="CornerRadius" Value="{DynamicResource DesignCornerRadiusLg}" />
         <Setter Property="Padding" Value="20" />
         <Setter Property="Margin" Value="0,0,0,14" />
         <Setter Property="BoxShadow" Value="0 2 8 #12000000" />
     </Style>
 
     <Style Selector="Border.settings-option-card">
-        <Setter Property="CornerRadius" Value="14" />
+        <Setter Property="CornerRadius" Value="{DynamicResource DesignCornerRadiusSm}" />
         <Setter Property="Padding" Value="16" />
         <Setter Property="Margin" Value="0,0,0,12" />
         <Setter Property="BoxShadow" Value="0 1 4 #0F000000" />
     </Style>
 
     <Style Selector="Border.settings-list-item">
-        <Setter Property="CornerRadius" Value="14" />
+        <Setter Property="CornerRadius" Value="{DynamicResource DesignCornerRadiusSm}" />
         <Setter Property="Padding" Value="16" />
         <Setter Property="Margin" Value="0,0,0,10" />
         <Setter Property="BoxShadow" Value="0 1 4 #0F000000" />
@@ -77,7 +77,7 @@
         <Setter Property="Background" Value="{DynamicResource AdaptiveButtonBackgroundBrush}" />
         <Setter Property="BorderBrush" Value="{DynamicResource AdaptiveButtonBorderBrush}" />
         <Setter Property="BorderThickness" Value="1" />
-        <Setter Property="CornerRadius" Value="12" />
+        <Setter Property="CornerRadius" Value="{DynamicResource DesignCornerRadiusXs}" />
         <Setter Property="HorizontalAlignment" Value="Left" />
         <Setter Property="VerticalAlignment" Value="Top" />
     </Style>
@@ -201,7 +201,7 @@
         <Setter Property="Background" Value="{DynamicResource AdaptiveSurfaceRaisedBrush}" />
         <Setter Property="BorderBrush" Value="{DynamicResource AdaptiveGlassPanelBorderBrush}" />
         <Setter Property="BorderThickness" Value="1" />
-        <Setter Property="CornerRadius" Value="12" />
+        <Setter Property="CornerRadius" Value="{DynamicResource DesignCornerRadiusXs}" />
         <Setter Property="Padding" Value="14,12" />
         <Setter Property="Margin" Value="0,0,0,8" />
         <Setter Property="HorizontalContentAlignment" Value="Stretch" />
@@ -229,7 +229,7 @@
         <Setter Property="Background" Value="{DynamicResource AdaptiveAccentBrush}" />
         <Setter Property="Foreground" Value="{DynamicResource AdaptiveOnAccentBrush}" />
         <Setter Property="BorderThickness" Value="0" />
-        <Setter Property="CornerRadius" Value="10" />
+        <Setter Property="CornerRadius" Value="{DynamicResource DesignCornerRadiusXs}" />
         <Setter Property="Padding" Value="16,10" />
         <Setter Property="MinHeight" Value="36" />
     </Style>
@@ -254,7 +254,7 @@
         <Setter Property="Width" Value="36" />
         <Setter Property="Height" Value="36" />
         <Setter Property="Padding" Value="0" />
-        <Setter Property="CornerRadius" Value="10" />
+        <Setter Property="CornerRadius" Value="{DynamicResource DesignCornerRadiusXs}" />
         <Setter Property="MinHeight" Value="36" />
         <Setter Property="Background" Value="{DynamicResource AdaptiveButtonBackgroundBrush}" />
         <Setter Property="BorderBrush" Value="{DynamicResource AdaptiveButtonBorderBrush}" />

LanMountainDesktop/ViewModels/SettingsViewModels.cs

@@ -12,6 +12,7 @@ using LanMountainDesktop.Models;
 using LanMountainDesktop.PluginSdk;
 using LanMountainDesktop.Services;
 using LanMountainDesktop.Services.Settings;
+using LanMountainDesktop.Settings.Core;
 
 namespace LanMountainDesktop.ViewModels;
 
@@ -481,6 +482,9 @@ public sealed partial class AppearanceSettingsPageViewModel : ViewModelBase
     [ObservableProperty]
     private bool _useSystemChrome;
 
+    [ObservableProperty]
+    private double _globalCornerRadiusScale = GlobalAppearanceSettings.DefaultCornerRadiusScale;
+
     [ObservableProperty]
     private SelectionOption _selectedThemeColorMode = new(ThemeAppearanceValues.ColorModeSeedMonet, "User theme color Monet");
 
@@ -547,6 +551,12 @@ public sealed partial class AppearanceSettingsPageViewModel : ViewModelBase
     [ObservableProperty]
     private string _systemMaterialLabel = string.Empty;
 
+    [ObservableProperty]
+    private string _globalCornerRadiusLabel = string.Empty;
+
+    [ObservableProperty]
+    private string _globalCornerRadiusDescription = string.Empty;
+
     [ObservableProperty]
     private string _themeHeader = string.Empty;
 
@@ -668,6 +678,32 @@ public sealed partial class AppearanceSettingsPageViewModel : ViewModelBase
         PersistCurrentState(restartRequired: false);
     }
 
+    partial void OnGlobalCornerRadiusScaleChanged(double value)
+    {
+        if (_isInitializing)
+        {
+            return;
+        }
+
+        var normalized = GlobalAppearanceSettings.NormalizeCornerRadiusScale(value);
+        if (Math.Abs(normalized - value) > 0.0001d)
+        {
+            _isInitializing = true;
+            try
+            {
+                GlobalCornerRadiusScale = normalized;
+            }
+            finally
+            {
+                _isInitializing = false;
+            }
+
+            return;
+        }
+
+        PersistCurrentState(restartRequired: false);
+    }
+
     partial void OnSelectedThemeColorModeChanged(SelectionOption value)
     {
         if (_isInitializing || value is null)
@@ -732,6 +768,8 @@ public sealed partial class AppearanceSettingsPageViewModel : ViewModelBase
         ThemeColorLabel = L("settings.color.theme_color_label", "Theme Accent Color");
         ThemeColorModeLabel = L("settings.appearance.theme_color_mode_label", "Theme color source");
         SystemMaterialLabel = L("settings.appearance.system_material_label", "System material");
+        GlobalCornerRadiusLabel = L("settings.appearance.corner_radius.label", "Global corner radius");
+        GlobalCornerRadiusDescription = L("settings.appearance.corner_radius.description", "Adjust the shared radius scale used by cards, panels, and component containers.");
         ThemeSourceNeutralText = L("settings.appearance.theme_color_mode.neutral", "Default neutral");
         ThemeSourceUserColorText = L("settings.appearance.theme_color_mode.user", "User theme color Monet");
         ThemeSourceWallpaperText = L("settings.appearance.theme_color_mode.wallpaper", "Wallpaper Monet");
@@ -776,6 +814,7 @@ public sealed partial class AppearanceSettingsPageViewModel : ViewModelBase
         IsNightMode = theme.IsNightMode;
         ThemeColor = theme.ThemeColor ?? string.Empty;
         UseSystemChrome = theme.UseSystemChrome;
+        GlobalCornerRadiusScale = GlobalAppearanceSettings.NormalizeCornerRadiusScale(theme.GlobalCornerRadiusScale);
         _selectedWallpaperSeed = theme.SelectedWallpaperSeed;
         SyncCustomSeedPickerWithSavedThemeColor();
 
@@ -825,6 +864,7 @@ public sealed partial class AppearanceSettingsPageViewModel : ViewModelBase
             IsNightMode,
             themeColor,
             UseSystemChrome,
+            GlobalAppearanceSettings.NormalizeCornerRadiusScale(GlobalCornerRadiusScale),
             themeColorMode,
             ThemeAppearanceValues.NormalizeSystemMaterialMode(SelectedSystemMaterialMode?.Value),
             _selectedWallpaperSeed);
@@ -956,7 +996,7 @@ public sealed partial class ComponentsSettingsPageViewModel : ViewModelBase
     private string _pageDescription = string.Empty;
 
     [ObservableProperty]
-    private string _gridHeader = string.Empty;
+    private string _componentsHeader = string.Empty;
 
     [ObservableProperty]
     private string _shortSideCellsLabel = string.Empty;
@@ -967,6 +1007,22 @@ public sealed partial class ComponentsSettingsPageViewModel : ViewModelBase
     [ObservableProperty]
     private string _spacingPresetLabel = string.Empty;
 
+    [ObservableProperty]
+    private double _globalCornerRadiusScale = GlobalAppearanceSettings.DefaultCornerRadiusScale;
+
+    public double GlobalCornerRadiusMinimum => GlobalAppearanceSettings.MinimumCornerRadiusScale;
+
+    public double GlobalCornerRadiusMaximum => GlobalAppearanceSettings.MaximumCornerRadiusScale;
+
+    [ObservableProperty]
+    private string _componentRadiusHeader = string.Empty;
+
+    [ObservableProperty]
+    private string _globalCornerRadiusLabel = string.Empty;
+
+    [ObservableProperty]
+    private string _globalCornerRadiusDescription = string.Empty;
+
     public void Load()
     {
         var state = _settingsFacade.Grid.Get();
@@ -976,6 +1032,9 @@ public sealed partial class ComponentsSettingsPageViewModel : ViewModelBase
         SelectedSpacingPreset = SpacingPresets.FirstOrDefault(option =>
             string.Equals(option.Value, spacingPreset, StringComparison.OrdinalIgnoreCase))
             ?? SpacingPresets[1];
+
+        var theme = _settingsFacade.Theme.Get();
+        GlobalCornerRadiusScale = GlobalAppearanceSettings.NormalizeCornerRadiusScale(theme.GlobalCornerRadiusScale);
     }
 
     partial void OnShortSideCellsChanged(int value)
@@ -1008,6 +1067,32 @@ public sealed partial class ComponentsSettingsPageViewModel : ViewModelBase
         SaveGrid();
     }
 
+    partial void OnGlobalCornerRadiusScaleChanged(double value)
+    {
+        if (_isInitializing)
+        {
+            return;
+        }
+
+        var normalized = GlobalAppearanceSettings.NormalizeCornerRadiusScale(value);
+        if (Math.Abs(normalized - value) > 0.0001d)
+        {
+            _isInitializing = true;
+            try
+            {
+                GlobalCornerRadiusScale = normalized;
+            }
+            finally
+            {
+                _isInitializing = false;
+            }
+
+            return;
+        }
+
+        SaveComponentCornerRadius();
+    }
+
     private void SaveGrid()
     {
         _settingsFacade.Grid.Save(new GridSettingsState(
@@ -1016,23 +1101,41 @@ public sealed partial class ComponentsSettingsPageViewModel : ViewModelBase
             Math.Clamp(EdgeInsetPercent, 0, 30)));
     }
 
+    private void SaveComponentCornerRadius()
+    {
+        var theme = _settingsFacade.Theme.Get();
+        _settingsFacade.Theme.Save(new ThemeAppearanceSettingsState(
+            theme.IsNightMode,
+            theme.ThemeColor,
+            theme.UseSystemChrome,
+            GlobalAppearanceSettings.NormalizeCornerRadiusScale(GlobalCornerRadiusScale),
+            theme.ThemeColorMode,
+            theme.SystemMaterialMode,
+            theme.SelectedWallpaperSeed));
+    }
+
     private IReadOnlyList<SelectionOption> CreateSpacingPresets()
     {
         return
         [
-            new SelectionOption("Compact", L("settings.grid.spacing_compact", "Compact")),
+            new SelectionOption("Compact", L("settings.components.spacing_compact", "Compact")),
-            new SelectionOption("Relaxed", L("settings.grid.spacing_relaxed", "Relaxed"))
+            new SelectionOption("Relaxed", L("settings.components.spacing_relaxed", "Relaxed"))
         ];
     }
 
     private void RefreshLocalizedText()
     {
         PageTitle = L("settings.components.title", "Components");
-        PageDescription = L("settings.components.description", "Desktop grid and widget placement density.");
+        PageDescription = L("settings.components.description", "Adjust component layout and corner design.");
-        GridHeader = L("settings.components.grid_header", "Grid Layout");
+        ComponentsHeader = L("settings.components.header", "Grid Settings");
-        ShortSideCellsLabel = L("settings.grid.short_side_label", "Short Side Cells");
+        ShortSideCellsLabel = L("settings.components.short_side_label", "Short Side Cells");
-        EdgeInsetPercentLabel = L("settings.grid.edge_inset_label", "Screen Inset");
+        EdgeInsetPercentLabel = L("settings.components.edge_inset_label", "Screen Inset");
-        SpacingPresetLabel = L("settings.grid.spacing_label", "Grid Spacing");
+        SpacingPresetLabel = L("settings.components.spacing_label", "Component Spacing");
+        ComponentRadiusHeader = L("settings.components.corner_radius.header", "Corner Design");
+        GlobalCornerRadiusLabel = L("settings.components.corner_radius.label", "Component Corner Radius");
+        GlobalCornerRadiusDescription = L(
+            "settings.components.corner_radius.description",
+            "Adjust the shared corner radius from a square edge to a capsule-like shape, and expand the internal safe area with it.");
     }
 
     private string L(string key, string fallback)

LanMountainDesktop/Views/ComponentEditorWindow.axaml

@@ -53,7 +53,7 @@
         
         <!-- MD3 Button Styles -->
         <Style Selector="Button.component-editor-footer-button">
-            <Setter Property="CornerRadius" Value="20" />
+            <Setter Property="CornerRadius" Value="{DynamicResource DesignCornerRadiusMd}" />
             <Setter Property="Background" Value="{DynamicResource EditorPrimaryBrush}" />
             <Setter Property="Foreground" Value="{DynamicResource EditorOnPrimaryBrush}" />
             <Setter Property="Height" Value="40" />
@@ -118,7 +118,7 @@
                     Height="64"
                     Background="{DynamicResource EditorPrimaryBrush}"
                     Foreground="{DynamicResource EditorOnPrimaryBrush}"
-                    CornerRadius="18"
+                    CornerRadius="{DynamicResource DesignCornerRadiusMd}"
                     Classes="accent"
                     Click="OnCloseClick">
                 <Button.Styles>

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/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

@@ -38,8 +38,8 @@
         <Grid Grid.Row="1"
               ColumnDefinitions="240,*"
               ColumnSpacing="12">
-            <Border Classes="glass-panel"
+            <Border Classes="surface-translucent-panel"
-                    CornerRadius="24"
+                    CornerRadius="{DynamicResource DesignCornerRadiusLg}"
                     Padding="10">
                 <ListBox x:Name="CategoryListBox"
                          Background="Transparent"
@@ -50,7 +50,7 @@
                         <DataTemplate x:DataType="vm:ComponentLibraryCategoryViewModel">
                             <Border Padding="10"
                                     Margin="0,0,0,6"
-                                    CornerRadius="14"
+                                    CornerRadius="{DynamicResource DesignCornerRadiusSm}"
                                     Background="{DynamicResource AdaptiveNavItemBackgroundBrush}">
                                 <Grid ColumnDefinitions="Auto,*"
                                       ColumnSpacing="8">
@@ -70,8 +70,8 @@
             </Border>
 
             <Border Grid.Column="1"
-                    Classes="glass-strong"
+                    Classes="surface-translucent-strong"
-                    CornerRadius="24"
+                    CornerRadius="{DynamicResource DesignCornerRadiusLg}"
                     Padding="10">
                 <ScrollViewer VerticalScrollBarVisibility="Auto"
                               HorizontalScrollBarVisibility="Disabled">
@@ -87,14 +87,14 @@
                                 <Border Width="240"
                                         Height="220"
                                         Margin="6"
-                                        CornerRadius="18"
+                                        CornerRadius="{DynamicResource DesignCornerRadiusLg}"
                                         Padding="10"
                                         Background="{DynamicResource AdaptiveSurfaceRaisedBrush}"
                                         BorderBrush="{DynamicResource AdaptiveButtonBorderBrush}"
                                         BorderThickness="1">
                                     <Grid RowDefinitions="*,Auto,Auto"
                                           RowSpacing="8">
-                                        <Border CornerRadius="12"
+                                        <Border CornerRadius="{DynamicResource DesignCornerRadiusXs}"
                                                 Background="{DynamicResource AdaptiveGlassPanelBackgroundBrush}"
                                                 BorderThickness="1"
                                                 BorderBrush="{DynamicResource AdaptiveGlassPanelBorderBrush}"

LanMountainDesktop/Views/Components/AnalogClockWidget.axaml.cs

@@ -325,8 +325,9 @@ public partial class AnalogClockWidget : UserControl, IDesktopComponentWidget, I
     {
         _currentCellSize = Math.Max(1, cellSize);
         var scale = ResolveScale();
+        var mainRectangleCornerRadius = ComponentChromeCornerRadiusHelper.ResolveMainRectangleRadius();
 
-        RootBorder.CornerRadius = new CornerRadius(Math.Clamp(42 * scale, 16, 56));
+        RootBorder.CornerRadius = mainRectangleCornerRadius;
         RootBorder.Padding = new Thickness(Math.Clamp(14 * scale, 8, 26));
         ApplyModeVisualIfNeeded();
     }

LanMountainDesktop/Views/Components/BaiduHotSearchWidget.axaml.cs

@@ -381,12 +381,13 @@ public partial class BaiduHotSearchWidget : UserControl, IDesktopComponentWidget
         var totalWidth = Bounds.Width > 1 ? Bounds.Width : _currentCellSize * BaseWidthCells;
         var totalHeight = Bounds.Height > 1 ? Bounds.Height : _currentCellSize * BaseHeightCells;
 
-        RootBorder.CornerRadius = new CornerRadius(Math.Clamp(34 * softScale, 16, 52));
+        var unifiedMainRectangle = ResolveUnifiedMainRectangle();
+        RootBorder.CornerRadius = unifiedMainRectangle;
         RootBorder.Padding = new Thickness(0);
 
         var horizontalPadding = Math.Clamp(16 * softScale, 8, 24);
         var verticalPadding = Math.Clamp(14 * softScale, 7, 20);
-        CardBorder.CornerRadius = new CornerRadius(Math.Clamp(34 * softScale, 16, 52));
+        CardBorder.CornerRadius = unifiedMainRectangle;
         CardBorder.Padding = new Thickness(horizontalPadding, verticalPadding, horizontalPadding, verticalPadding);
 
         var innerWidth = Math.Max(120, totalWidth - (horizontalPadding * 2d));
@@ -615,6 +616,11 @@ public partial class BaiduHotSearchWidget : UserControl, IDesktopComponentWidget
         return Math.Clamp(Math.Min(scaleX, scaleY), 0.72, 2.8);
     }
 
+    private CornerRadius ResolveUnifiedMainRectangle() => new(ResolveUnifiedMainRadiusValue());
+
+    private static double ResolveUnifiedMainRadiusValue() =>
+        HostAppearanceThemeProvider.GetOrCreate().GetCurrent().CornerRadiusTokens.Lg.TopLeft;
+
     private string L(string key, string fallback)
     {
         return _localizationService.GetString(_languageCode, key, fallback);

LanMountainDesktop/Views/Components/BilibiliHotSearchWidget.axaml.cs

@@ -386,12 +386,13 @@ public partial class BilibiliHotSearchWidget : UserControl, IDesktopComponentWid
         var totalWidth = Bounds.Width > 1 ? Bounds.Width : _currentCellSize * BaseWidthCells;
         var totalHeight = Bounds.Height > 1 ? Bounds.Height : _currentCellSize * BaseHeightCells;
 
-        RootBorder.CornerRadius = new CornerRadius(Math.Clamp(34 * softScale, 16, 52));
+        var unifiedMainRectangle = ResolveUnifiedMainRectangle();
+        RootBorder.CornerRadius = unifiedMainRectangle;
         RootBorder.Padding = new Thickness(0);
 
         var horizontalPadding = Math.Clamp(16 * softScale, 8, 24);
         var verticalPadding = Math.Clamp(14 * softScale, 7, 20);
-        CardBorder.CornerRadius = new CornerRadius(Math.Clamp(34 * softScale, 16, 52));
+        CardBorder.CornerRadius = unifiedMainRectangle;
         CardBorder.Padding = new Thickness(horizontalPadding, verticalPadding, horizontalPadding, verticalPadding);
 
         var innerWidth = Math.Max(120, totalWidth - (horizontalPadding * 2d));
@@ -629,6 +630,11 @@ public partial class BilibiliHotSearchWidget : UserControl, IDesktopComponentWid
         return Math.Clamp(Math.Min(scaleX, scaleY), 0.72, 2.8);
     }
 
+    private CornerRadius ResolveUnifiedMainRectangle() => new(ResolveUnifiedMainRadiusValue());
+
+    private static double ResolveUnifiedMainRadiusValue() =>
+        HostAppearanceThemeProvider.GetOrCreate().GetCurrent().CornerRadiusTokens.Lg.TopLeft;
+
     private string L(string key, string fallback)
     {
         return _localizationService.GetString(_languageCode, key, fallback);

LanMountainDesktop/Views/Components/BrowserWidget.axaml.cs

@@ -79,11 +79,12 @@ public partial class BrowserWidget : UserControl, IDesktopComponentWidget,
     {
         _currentCellSize = Math.Max(1, cellSize);
 
-        RootBorder.CornerRadius = new CornerRadius(Math.Clamp(_currentCellSize * 0.34, 12, 28));
+        var mainRectangleCornerRadius = ComponentChromeCornerRadiusHelper.ResolveMainRectangleRadius();
+        RootBorder.CornerRadius = mainRectangleCornerRadius;
         RootBorder.Padding = new Thickness(Math.Clamp(_currentCellSize * 0.20, 8, 18));
 
-        WebViewHostBorder.CornerRadius = new CornerRadius(Math.Clamp(_currentCellSize * 0.24, 10, 22));
+        WebViewHostBorder.CornerRadius = mainRectangleCornerRadius;
-        AddressBarBorder.CornerRadius = new CornerRadius(Math.Clamp(_currentCellSize * 0.22, 10, 20));
+        AddressBarBorder.CornerRadius = mainRectangleCornerRadius;
         AddressBarBorder.Padding = new Thickness(8, 6);
 
         if (RootBorder.Child is Grid rootGrid)

LanMountainDesktop/Views/Components/ClassScheduleWidget.axaml.cs

@@ -613,18 +613,17 @@ public partial class ClassScheduleWidget : UserControl, IDesktopComponentWidget,
             ? CreateBrush("#FF4FC3F7")
             : CreateBrush("#FF3250");
 
-        var cornerRadius = Math.Clamp(_currentCellSize * 0.45, 24, 44);
+        RootBorder.CornerRadius = ComponentChromeCornerRadiusHelper.ResolveMainRectangleRadius();
-        RootBorder.CornerRadius = new CornerRadius(cornerRadius);
         RootBorder.Background = _isNightVisual
             ? CreateGradientBrush("#171A21", "#0C0E14")
             : CreateGradientBrush("#F7F8FC", "#ECEFF6");
         RootBorder.BorderBrush = CreateBrush(_isNightVisual ? "#24FFFFFF" : "#15000000");
 
         var rootPadding = new Thickness(
-            Math.Clamp(16 * scale, 10, 24),
+            ComponentChromeCornerRadiusHelper.SafeValue(16 * scale, 10, 24),
-            Math.Clamp(14 * scale, 9, 20),
+            ComponentChromeCornerRadiusHelper.SafeValue(14 * scale, 9, 20),
-            Math.Clamp(16 * scale, 10, 24),
+            ComponentChromeCornerRadiusHelper.SafeValue(16 * scale, 10, 24),
-            Math.Clamp(14 * scale, 8, 20));
+            ComponentChromeCornerRadiusHelper.SafeValue(14 * scale, 8, 20));
         RootBorder.Padding = rootPadding;
 
         LayoutGrid.RowSpacing = Math.Clamp(14 * scale, 6, 20);

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

@@ -132,8 +132,8 @@ public partial class ClockWidget : UserControl, IDesktopComponentWidget, ITimeZo
         var targetHeight = Math.Clamp(cellSize * 0.74, 34, 74);
         RootBorder.Height = targetHeight;
         
-        // 2. 动态圆角：确保始终是完美的胶囊半圆
+        // 2. 主矩形统一到主题主档圆角
-        RootBorder.CornerRadius = new CornerRadius(targetHeight / 2);
+        RootBorder.CornerRadius = ResolveUnifiedMainRectangle();
         RootBorder.VerticalAlignment = Avalonia.Layout.VerticalAlignment.Center;
         
         // 3. 核心：满盈字阶 (Filled Typography)
@@ -189,4 +189,9 @@ public partial class ClockWidget : UserControl, IDesktopComponentWidget, ITimeZo
         RootBorder.ClearValue(Border.BorderThicknessProperty);
         RootBorder.ClearValue(Border.BoxShadowProperty);
     }
+
+    private CornerRadius ResolveUnifiedMainRectangle() => new(ResolveUnifiedMainRadiusValue());
+
+    private static double ResolveUnifiedMainRadiusValue() =>
+        HostAppearanceThemeProvider.GetOrCreate().GetCurrent().CornerRadiusTokens.Lg.TopLeft;
 }

LanMountainDesktop/Views/Components/CnrDailyNewsWidget.axaml.cs

@@ -480,7 +480,7 @@ public partial class CnrDailyNewsWidget : UserControl, IDesktopComponentWidget,
             {
                 Width = 160,
                 Height = 90,
-                CornerRadius = new CornerRadius(16),
+                CornerRadius = ComponentChromeCornerRadiusHelper.Scale(16, 8, 22),
                 ClipToBounds = true,
                 Background = new SolidColorBrush(Color.Parse("#E6E6E6")),
                 IsHitTestVisible = false
@@ -545,10 +545,11 @@ public partial class CnrDailyNewsWidget : UserControl, IDesktopComponentWidget,
         var scale = ResolveScale();
         var totalWidth = Bounds.Width > 1 ? Bounds.Width : _currentCellSize * BaseWidthCells;
 
-        RootBorder.CornerRadius = new CornerRadius(Math.Clamp(34 * scale, 16, 52));
+        var unifiedMainRectangle = ResolveUnifiedMainRectangle();
+        RootBorder.CornerRadius = unifiedMainRectangle;
         RootBorder.Padding = new Thickness(0);
 
-        CardBorder.CornerRadius = new CornerRadius(Math.Clamp(34 * scale, 16, 52));
+        CardBorder.CornerRadius = unifiedMainRectangle;
         CardBorder.Padding = new Thickness(
             Math.Clamp(16 * scale, 8, 24),
             Math.Clamp(14 * scale, 7, 22),
@@ -573,8 +574,8 @@ public partial class CnrDailyNewsWidget : UserControl, IDesktopComponentWidget,
         News1ImageHost.Height = imageHeight;
         News2ImageHost.Width = imageWidth;
         News2ImageHost.Height = imageHeight;
-        News1ImageHost.CornerRadius = new CornerRadius(Math.Clamp(16 * scale, 8, 22));
+        News1ImageHost.CornerRadius = ComponentChromeCornerRadiusHelper.Scale(16 * scale, 8, 22);
-        News2ImageHost.CornerRadius = new CornerRadius(Math.Clamp(16 * scale, 8, 22));
+        News2ImageHost.CornerRadius = ComponentChromeCornerRadiusHelper.Scale(16 * scale, 8, 22);
 
         var columnGap = Math.Clamp(12 * scale, 6, 18);
         NewsItem1Grid.ColumnSpacing = columnGap;
@@ -611,7 +612,7 @@ public partial class CnrDailyNewsWidget : UserControl, IDesktopComponentWidget,
 
             row.ImageHost.Width = imageWidth;
             row.ImageHost.Height = imageHeight;
-            row.ImageHost.CornerRadius = new CornerRadius(Math.Clamp(16 * scale, 8, 22));
+            row.ImageHost.CornerRadius = ComponentChromeCornerRadiusHelper.Scale(16 * scale, 8, 22);
 
             row.TitleTextBlock.MaxWidth = availableTextWidth;
             row.TitleTextBlock.FontSize = Math.Clamp(19 * scale, 10, 25);
@@ -865,6 +866,11 @@ public partial class CnrDailyNewsWidget : UserControl, IDesktopComponentWidget,
         return Math.Clamp(Math.Min(cellScale, Math.Min(widthScale, heightScale)), 0.56, 2.0);
     }
 
+    private CornerRadius ResolveUnifiedMainRectangle() => new(ResolveUnifiedMainRadiusValue());
+
+    private static double ResolveUnifiedMainRadiusValue() =>
+        HostAppearanceThemeProvider.GetOrCreate().GetCurrent().CornerRadiusTokens.Lg.TopLeft;
+
     private static string NormalizeCompactText(string? text)
     {
         if (string.IsNullOrWhiteSpace(text))

LanMountainDesktop/Views/Components/ComponentChromeCornerRadiusHelper.cs

@@ -0,0 +1,94 @@
+using Avalonia;
+using Avalonia.Controls;
+using Avalonia.Media;
+using LanMountainDesktop.Host.Abstractions;
+using LanMountainDesktop.Services;
+using LanMountainDesktop.Settings.Core;
+
+namespace LanMountainDesktop.Views.Components;
+
+internal static class ComponentChromeCornerRadiusHelper
+{
+    public static double ResolveMainRectangleRadiusValue(ComponentChromeContext? chromeContext = null, double fallback = 24d)
+    {
+        if (chromeContext is not null)
+        {
+            return Math.Max(0d, chromeContext.CornerRadiusTokens.Lg.TopLeft);
+        }
+
+        var snapshot = HostAppearanceThemeProvider.GetOrCreate().GetCurrent();
+        var resolved = snapshot.CornerRadiusTokens.Lg.TopLeft;
+        return double.IsFinite(resolved)
+            ? Math.Max(0d, resolved)
+            : Math.Max(0d, fallback * ResolveScale(chromeContext));
+    }
+
+    public static CornerRadius ResolveMainRectangleRadius(ComponentChromeContext? chromeContext = null, double fallback = 24d)
+    {
+        return new CornerRadius(ResolveMainRectangleRadiusValue(chromeContext, fallback));
+    }
+
+    public static double ResolveScale(ComponentChromeContext? chromeContext = null)
+    {
+        if (chromeContext is not null)
+        {
+            return Math.Max(GlobalAppearanceSettings.MinimumCornerRadiusScale, chromeContext.GlobalCornerRadiusScale);
+        }
+
+        return Math.Max(
+            GlobalAppearanceSettings.MinimumCornerRadiusScale,
+            HostAppearanceThemeProvider.GetOrCreate().GetCurrent().GlobalCornerRadiusScale);
+    }
+
+    public static CornerRadius Scale(double baseRadius, double min, double max, ComponentChromeContext? chromeContext = null)
+    {
+        var scale = ResolveScale(chromeContext);
+        return new CornerRadius(Math.Clamp(baseRadius * scale, min * scale, max * scale));
+    }
+
+    public static void Apply(CornerRadius radius, params Border?[] chromeLayers)
+    {
+        foreach (var chromeLayer in chromeLayers)
+        {
+            if (chromeLayer is not null)
+            {
+                chromeLayer.CornerRadius = radius;
+            }
+        }
+    }
+
+    public static CornerRadius ResolveToken(string key, double fallback)
+    {
+        var application = Application.Current;
+        return application is not null &&
+               application.Resources.TryGetResource(key, application.ActualThemeVariant, out var resource) &&
+               resource is CornerRadius radius
+            ? radius
+            : new CornerRadius(fallback);
+    }
+
+    public static double ScaleValue(double value, ComponentChromeContext? chromeContext = null)
+    {
+        return value * ResolveScale(chromeContext);
+    }
+
+    public static double ResolveContentSafetyScale(
+        ComponentChromeContext? chromeContext = null,
+        double responsiveness = 0.45d)
+    {
+        var scale = ResolveScale(chromeContext);
+        var normalizedResponsiveness = Math.Clamp(responsiveness, 0d, 1d);
+        return 1d + ((scale - 1d) * normalizedResponsiveness);
+    }
+
+    public static double SafeValue(
+        double baseValue,
+        double min,
+        double max,
+        ComponentChromeContext? chromeContext = null,
+        double responsiveness = 0.45d)
+    {
+        var safetyScale = ResolveContentSafetyScale(chromeContext, responsiveness);
+        return Math.Clamp(baseValue * safetyScale, min * safetyScale, max * safetyScale);
+    }
+}

LanMountainDesktop/Views/Components/DailyArtworkWidget.axaml.cs

@@ -101,7 +101,7 @@ public partial class DailyArtworkWidget : UserControl, IDesktopComponentWidget,
         _currentCellSize = Math.Max(1, cellSize);
         var scale = ResolveScale();
 
-        RootBorder.CornerRadius = new CornerRadius(Math.Clamp(34 * scale, 16, 52));
+        RootBorder.CornerRadius = ResolveUnifiedMainRectangle();
 
         InfoPanel.Padding = new Thickness(
             Math.Clamp(18 * scale, 10, 28),
@@ -754,6 +754,11 @@ public partial class DailyArtworkWidget : UserControl, IDesktopComponentWidget,
         return Math.Clamp(Math.Min(cellScale, Math.Min(widthScale, heightScale)), 0.56, 2.0);
     }
 
+    private CornerRadius ResolveUnifiedMainRectangle() => new(ResolveUnifiedMainRadiusValue());
+
+    private static double ResolveUnifiedMainRadiusValue() =>
+        HostAppearanceThemeProvider.GetOrCreate().GetCurrent().CornerRadiusTokens.Lg.TopLeft;
+
     private static string NormalizeCompactText(string? text)
     {
         if (string.IsNullOrWhiteSpace(text))

LanMountainDesktop/Views/Components/DailyPoetryWidget.axaml.cs

@@ -92,7 +92,7 @@ public partial class DailyPoetryWidget : UserControl, IDesktopComponentWidget, I
         _currentCellSize = Math.Max(1, cellSize);
         var scale = ResolveScale();
 
-        RootBorder.CornerRadius = new CornerRadius(Math.Clamp(34 * scale, 16, 52));
+        RootBorder.CornerRadius = ResolveUnifiedMainRectangle();
         RootBorder.Padding = new Thickness(
             Math.Clamp(20 * scale, 10, 34),
             Math.Clamp(16 * scale, 8, 28),
@@ -452,6 +452,11 @@ public partial class DailyPoetryWidget : UserControl, IDesktopComponentWidget, I
         return Math.Clamp(Math.Min(cellScale, Math.Min(widthScale, heightScale)), 0.52, 2.2);
     }
 
+    private CornerRadius ResolveUnifiedMainRectangle() => new(ResolveUnifiedMainRadiusValue());
+
+    private static double ResolveUnifiedMainRadiusValue() =>
+        HostAppearanceThemeProvider.GetOrCreate().GetCurrent().CornerRadiusTokens.Lg.TopLeft;
+
     private void ApplyAdaptiveTextLayout(bool isNightMode, double scale, double totalWidth, double totalHeight)
     {
         var padding = RootBorder.Padding;

LanMountainDesktop/Views/Components/DailyWord2x2Widget.axaml.cs

@@ -328,8 +328,9 @@ public partial class DailyWord2x2Widget : UserControl, IDesktopComponentWidget,
         var totalWidth = Bounds.Width > 1 ? Bounds.Width : _currentCellSize * BaseWidthCells;
         var totalHeight = Bounds.Height > 1 ? Bounds.Height : _currentCellSize * BaseHeightCells;
 
-        RootBorder.CornerRadius = new CornerRadius(Math.Clamp(30 * scale, 14, 40));
+        var unifiedMainRectangle = ResolveUnifiedMainRectangle();
-        CardBorder.CornerRadius = RootBorder.CornerRadius;
+        RootBorder.CornerRadius = unifiedMainRectangle;
+        CardBorder.CornerRadius = unifiedMainRectangle;
         CardBorder.Padding = new Thickness(
             Math.Clamp(12 * scale, 8, 18),
             Math.Clamp(11 * scale, 7, 16),
@@ -482,6 +483,11 @@ public partial class DailyWord2x2Widget : UserControl, IDesktopComponentWidget,
         return Math.Clamp(Math.Min(cellScale, Math.Min(widthScale, heightScale)), 0.56, 2.0);
     }
 
+    private CornerRadius ResolveUnifiedMainRectangle() => new(ResolveUnifiedMainRadiusValue());
+
+    private static double ResolveUnifiedMainRadiusValue() =>
+        HostAppearanceThemeProvider.GetOrCreate().GetCurrent().CornerRadiusTokens.Lg.TopLeft;
+
     private string L(string key, string fallback)
     {
         return _localizationService.GetString(_languageCode, key, fallback);