0.5.12

插件市场UI优化

.github/workflows/airappmarket-validate.yml

@@ -0,0 +1,27 @@
+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

.gitignore

@@ -482,3 +482,13 @@ $RECYCLE.BIN/
 *.swp
 nul
 /publish-test
+/_build_verify
+/_build_verify_tray
+/_build_verify_plugin
+/_build_verify_plugin_tabs
+/_build_verify_sample_plugin
+/_build_verify_sample_plugin_capabilities
+/_build_verify_plugin_page_host
+/_build_verify_plugin_services
+/LanMountainDesktop.PluginSdk/_build_verify_*/
+/_build_obj

LanAirApp/README.md

@@ -0,0 +1,21 @@
+# LanAirApp
+
+## 中文
+
+`LanAirApp` 是阑山桌面插件生态的对外工作区。这个目录是宿主仓库中的镜像副本，权威版本以独立 `LanAirApp` 仓库为准。
+
+### 目录说明
+
+- `docs/`：插件开发与打包文档。
+- `samples/`：示例插件与参考项目。
+- `standards/`：插件清单和目录结构约定。
+- `tools/`：插件打包与辅助工具。
+
+### 与宿主的关系
+
+- 宿主程序只连接独立 `LanAirApp` 仓库中的官方市场索引。
+- 每个插件项目应在仓库根目录提供 `.laapp` 和 `README.md`。
+
+## English
+
+`LanAirApp` is the external-facing workspace for the LanMountainDesktop plugin ecosystem. This copy is only a mirror inside the host repository; the standalone `LanAirApp` repository remains the source of truth.

LanAirApp/docs/PLUGIN_DEVELOPMENT.md

@@ -0,0 +1,16 @@
+# 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

@@ -0,0 +1,14 @@
+# 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

@@ -0,0 +1,30 @@
+<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>..\..\..\LanMountainDesktop\bin\$(Configuration)\$(TargetFramework)\Extensions\Plugins\</PluginPackageOutputDirectory>
+    <PluginPackagePath>$(PluginPackageOutputDirectory)$(AssemblyName).laapp</PluginPackagePath>
+    <LegacyLoosePluginOutputDirectory>..\..\..\LanMountainDesktop\bin\$(Configuration)\$(TargetFramework)\Extensions\Plugins\SamplePlugin\</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

@@ -0,0 +1,79 @@
+{
+  "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.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

@@ -0,0 +1,79 @@
+{
+  "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

@@ -0,0 +1,9 @@
+# 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

@@ -0,0 +1,92 @@
+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",
+                "初始化日志已写入：{0}",
+                logPath));
+        }
+        catch (Exception ex)
+        {
+            _stateService.MarkBackendFaulted(localizer.Format(
+                "status.backend.detail.log_write_failed",
+                "初始化日志写入失败：{0}",
+                ex.Message));
+            throw;
+        }
+
+        _clockService.Start();
+
+        context.RegisterSettingsPage(new PluginSettingsPageRegistration(
+            "status",
+            localizer.GetString("settings.page_title", "插件状态"),
+            () => new SamplePluginSettingsView(context)));
+
+        context.RegisterDesktopComponent(new PluginDesktopComponentRegistration(
+            "LanMountainDesktop.SamplePlugin.StatusClock",
+            localizer.GetString("widget.display_name", "示例插件状态时钟"),
+            widgetContext => new SamplePluginStatusClockWidget(widgetContext),
+            iconKey: "PuzzlePiece",
+            category: localizer.GetString("widget.category", "插件"),
+            minWidthCells: 4,
+            minHeightCells: 4,
+            allowDesktopPlacement: true,
+            allowStatusBarPlacement: false,
+            resizeMode: PluginDesktopComponentResizeMode.Proportional,
+            cornerRadiusResolver: cellSize => Math.Clamp(cellSize * 0.34, 18, 34)));
+    }
+
+    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/SamplePluginRuntimeStatus.cs

@@ -0,0 +1,524 @@
+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

@@ -0,0 +1,374 @@
+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

@@ -0,0 +1,298 @@
+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

@@ -0,0 +1,9 @@
+{
+  "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

@@ -0,0 +1,11 @@
+# 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

@@ -0,0 +1,9 @@
+# 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

@@ -0,0 +1,9 @@
+{
+  "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/LanMountainDesktop.PluginPackager.csproj

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

LanAirApp/tools/LanMountainDesktop.PluginPackager/Program.cs

@@ -0,0 +1,136 @@
+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.PluginSdk/IPlugin.cs

@@ -0,0 +1,6 @@
+namespace LanMountainDesktop.PluginSdk;
+
+public interface IPlugin
+{
+    void Initialize(IPluginContext context);
+}

LanMountainDesktop.PluginSdk/IPluginContext.cs

@@ -0,0 +1,27 @@
+using System.Collections.Generic;
+
+namespace LanMountainDesktop.PluginSdk;
+
+public interface IPluginContext
+{
+    PluginManifest Manifest { get; }
+
+    string PluginDirectory { get; }
+
+    string DataDirectory { get; }
+
+    IServiceProvider Services { get; }
+
+    IReadOnlyDictionary<string, object?> Properties { get; }
+
+    T? GetService<T>();
+
+    bool TryGetProperty<T>(string key, out T? value);
+
+    void RegisterService<TService>(TService service)
+        where TService : class;
+
+    void RegisterSettingsPage(PluginSettingsPageRegistration registration);
+
+    void RegisterDesktopComponent(PluginDesktopComponentRegistration registration);
+}

LanMountainDesktop.PluginSdk/IPluginMessageBus.cs

@@ -0,0 +1,8 @@
+namespace LanMountainDesktop.PluginSdk;
+
+public interface IPluginMessageBus
+{
+    IDisposable Subscribe<TMessage>(Action<TMessage> handler);
+
+    void Publish<TMessage>(TMessage message);
+}

LanMountainDesktop.PluginSdk/IPluginPackageManager.cs

@@ -0,0 +1,8 @@
+namespace LanMountainDesktop.PluginSdk;
+
+public interface IPluginPackageManager
+{
+    IReadOnlyList<InstalledPluginInfo> GetInstalledPlugins();
+
+    PluginPackageInstallResult InstallPackage(string packagePath);
+}

LanMountainDesktop.PluginSdk/InstalledPluginInfo.cs

@@ -0,0 +1,8 @@
+namespace LanMountainDesktop.PluginSdk;
+
+public sealed record InstalledPluginInfo(
+    PluginManifest Manifest,
+    bool IsEnabled,
+    bool IsLoaded,
+    bool IsPackage,
+    string? ErrorMessage);

LanMountainDesktop.PluginSdk/LanMountainDesktop.PluginSdk.csproj

@@ -0,0 +1,15 @@
+<Project Sdk="Microsoft.NET.Sdk">
+
+  <PropertyGroup>
+    <TargetFramework>net10.0</TargetFramework>
+    <ImplicitUsings>enable</ImplicitUsings>
+    <Nullable>enable</Nullable>
+    <Version>1.0.0</Version>
+  </PropertyGroup>
+
+  <ItemGroup>
+    <Compile Remove="_build_verify_*\**\*.cs" />
+    <PackageReference Include="Avalonia" Version="11.3.12" />
+  </ItemGroup>
+
+</Project>

LanMountainDesktop.PluginSdk/PluginBase.cs

@@ -0,0 +1,8 @@
+namespace LanMountainDesktop.PluginSdk;
+
+public abstract class PluginBase : IPlugin
+{
+    public virtual void Initialize(IPluginContext context)
+    {
+    }
+}

LanMountainDesktop.PluginSdk/PluginDesktopComponentContext.cs

@@ -0,0 +1,66 @@
+namespace LanMountainDesktop.PluginSdk;
+
+public sealed class PluginDesktopComponentContext
+{
+    public PluginDesktopComponentContext(
+        PluginManifest manifest,
+        string pluginDirectory,
+        string dataDirectory,
+        IServiceProvider services,
+        IReadOnlyDictionary<string, object?> properties,
+        string componentId,
+        string? placementId,
+        double cellSize)
+    {
+        ArgumentNullException.ThrowIfNull(manifest);
+        ArgumentException.ThrowIfNullOrWhiteSpace(pluginDirectory);
+        ArgumentException.ThrowIfNullOrWhiteSpace(dataDirectory);
+        ArgumentException.ThrowIfNullOrWhiteSpace(componentId);
+        ArgumentNullException.ThrowIfNull(services);
+        ArgumentNullException.ThrowIfNull(properties);
+
+        Manifest = manifest;
+        PluginDirectory = pluginDirectory;
+        DataDirectory = dataDirectory;
+        Services = services;
+        Properties = properties;
+        ComponentId = componentId.Trim();
+        PlacementId = string.IsNullOrWhiteSpace(placementId) ? null : placementId.Trim();
+        CellSize = Math.Max(1, cellSize);
+    }
+
+    public PluginManifest Manifest { get; }
+
+    public string PluginDirectory { get; }
+
+    public string DataDirectory { get; }
+
+    public IServiceProvider Services { get; }
+
+    public IReadOnlyDictionary<string, object?> Properties { get; }
+
+    public string ComponentId { get; }
+
+    public string? PlacementId { get; }
+
+    public double CellSize { get; }
+
+    public T? GetService<T>()
+    {
+        return (T?)Services.GetService(typeof(T));
+    }
+
+    public bool TryGetProperty<T>(string key, out T? value)
+    {
+        ArgumentException.ThrowIfNullOrWhiteSpace(key);
+
+        if (Properties.TryGetValue(key, out var rawValue) && rawValue is T typedValue)
+        {
+            value = typedValue;
+            return true;
+        }
+
+        value = default;
+        return false;
+    }
+}

LanMountainDesktop.PluginSdk/PluginDesktopComponentRegistration.cs

@@ -0,0 +1,66 @@
+using Avalonia.Controls;
+
+namespace LanMountainDesktop.PluginSdk;
+
+public sealed class PluginDesktopComponentRegistration
+{
+    public PluginDesktopComponentRegistration(
+        string componentId,
+        string displayName,
+        Func<PluginDesktopComponentContext, Control> controlFactory,
+        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)
+    {
+        ArgumentException.ThrowIfNullOrWhiteSpace(componentId);
+        ArgumentException.ThrowIfNullOrWhiteSpace(displayName);
+        ArgumentException.ThrowIfNullOrWhiteSpace(iconKey);
+        ArgumentException.ThrowIfNullOrWhiteSpace(category);
+        ArgumentNullException.ThrowIfNull(controlFactory);
+
+        ComponentId = componentId.Trim();
+        DisplayName = displayName.Trim();
+        DisplayNameLocalizationKey = string.IsNullOrWhiteSpace(displayNameLocalizationKey)
+            ? null
+            : displayNameLocalizationKey.Trim();
+        ControlFactory = controlFactory;
+        IconKey = iconKey.Trim();
+        Category = category.Trim();
+        MinWidthCells = Math.Max(1, minWidthCells);
+        MinHeightCells = Math.Max(1, minHeightCells);
+        AllowDesktopPlacement = allowDesktopPlacement;
+        AllowStatusBarPlacement = allowStatusBarPlacement;
+        ResizeMode = resizeMode;
+        CornerRadiusResolver = cornerRadiusResolver;
+    }
+
+    public string ComponentId { get; }
+
+    public string DisplayName { get; }
+
+    public string? DisplayNameLocalizationKey { get; }
+
+    public Func<PluginDesktopComponentContext, Control> ControlFactory { get; }
+
+    public string IconKey { get; }
+
+    public string Category { get; }
+
+    public int MinWidthCells { get; }
+
+    public int MinHeightCells { get; }
+
+    public bool AllowDesktopPlacement { get; }
+
+    public bool AllowStatusBarPlacement { get; }
+
+    public PluginDesktopComponentResizeMode ResizeMode { get; }
+
+    public Func<double, double>? CornerRadiusResolver { get; }
+}

LanMountainDesktop.PluginSdk/PluginDesktopComponentResizeMode.cs

@@ -0,0 +1,7 @@
+namespace LanMountainDesktop.PluginSdk;
+
+public enum PluginDesktopComponentResizeMode
+{
+    Proportional = 0,
+    Free = 1
+}

LanMountainDesktop.PluginSdk/PluginEntranceAttribute.cs

@@ -0,0 +1,6 @@
+namespace LanMountainDesktop.PluginSdk;
+
+[AttributeUsage(AttributeTargets.Class, AllowMultiple = false, Inherited = false)]
+public sealed class PluginEntranceAttribute : Attribute
+{
+}

LanMountainDesktop.PluginSdk/PluginHostPropertyKeys.cs

@@ -0,0 +1,9 @@
+namespace LanMountainDesktop.PluginSdk;
+
+public static class PluginHostPropertyKeys
+{
+    public const string HostApplicationName = "HostApplicationName";
+    public const string HostVersion = "HostVersion";
+    public const string PluginSdkApiVersion = "PluginSdkApiVersion";
+    public const string HostLanguageCode = "HostLanguageCode";
+}

LanMountainDesktop.PluginSdk/PluginLocalizer.cs

@@ -0,0 +1,114 @@
+using System.Globalization;
+using System.Text.Json;
+
+namespace LanMountainDesktop.PluginSdk;
+
+public sealed class PluginLocalizer
+{
+    private static readonly JsonSerializerOptions JsonOptions = new()
+    {
+        ReadCommentHandling = JsonCommentHandling.Skip,
+        AllowTrailingCommas = true
+    };
+
+    private readonly Dictionary<string, Dictionary<string, string>> _cache =
+        new(StringComparer.OrdinalIgnoreCase);
+
+    public PluginLocalizer(string pluginDirectory, string? languageCode)
+    {
+        ArgumentException.ThrowIfNullOrWhiteSpace(pluginDirectory);
+
+        PluginDirectory = pluginDirectory;
+        LanguageCode = NormalizeLanguageCode(languageCode);
+    }
+
+    public string PluginDirectory { get; }
+
+    public string LanguageCode { get; }
+
+    public static PluginLocalizer Create(IPluginContext context)
+    {
+        ArgumentNullException.ThrowIfNull(context);
+        return new PluginLocalizer(context.PluginDirectory, ResolveLanguageCode(context.Properties));
+    }
+
+    public static PluginLocalizer Create(PluginDesktopComponentContext context)
+    {
+        ArgumentNullException.ThrowIfNull(context);
+        return new PluginLocalizer(context.PluginDirectory, ResolveLanguageCode(context.Properties));
+    }
+
+    public string GetString(string key, string fallback)
+    {
+        ArgumentException.ThrowIfNullOrWhiteSpace(key);
+
+        var primaryTable = LoadLanguageTable(LanguageCode);
+        if (primaryTable.TryGetValue(key, out var value) && !string.IsNullOrWhiteSpace(value))
+        {
+            return value;
+        }
+
+        if (!string.Equals(LanguageCode, "en-US", StringComparison.OrdinalIgnoreCase))
+        {
+            var fallbackTable = LoadLanguageTable("en-US");
+            if (fallbackTable.TryGetValue(key, out value) && !string.IsNullOrWhiteSpace(value))
+            {
+                return value;
+            }
+        }
+
+        return fallback;
+    }
+
+    public string Format(string key, string fallback, params object[] args)
+    {
+        return string.Format(CultureInfo.CurrentCulture, GetString(key, fallback), args);
+    }
+
+    public static string NormalizeLanguageCode(string? languageCode)
+    {
+        return string.Equals(languageCode, "en-US", StringComparison.OrdinalIgnoreCase)
+            ? "en-US"
+            : "zh-CN";
+    }
+
+    public static string ResolveLanguageCode(IReadOnlyDictionary<string, object?> properties)
+    {
+        ArgumentNullException.ThrowIfNull(properties);
+
+        return properties.TryGetValue(PluginHostPropertyKeys.HostLanguageCode, out var rawValue) &&
+               rawValue is string languageCode
+            ? NormalizeLanguageCode(languageCode)
+            : NormalizeLanguageCode(CultureInfo.CurrentUICulture.Name);
+    }
+
+    private Dictionary<string, string> LoadLanguageTable(string languageCode)
+    {
+        if (_cache.TryGetValue(languageCode, out var table))
+        {
+            return table;
+        }
+
+        var result = new Dictionary<string, string>(StringComparer.OrdinalIgnoreCase);
+        try
+        {
+            var filePath = Path.Combine(PluginDirectory, "Localization", $"{languageCode}.json");
+            if (File.Exists(filePath))
+            {
+                var json = File.ReadAllText(filePath).TrimStart('\uFEFF');
+                var data = JsonSerializer.Deserialize<Dictionary<string, string>>(json, JsonOptions);
+                if (data is not null)
+                {
+                    result = new Dictionary<string, string>(data, StringComparer.OrdinalIgnoreCase);
+                }
+            }
+        }
+        catch
+        {
+            // Keep empty localization table for plugin resilience.
+        }
+
+        _cache[languageCode] = result;
+        return result;
+    }
+}

LanMountainDesktop.PluginSdk/PluginManifest.cs

@@ -0,0 +1,107 @@
+using System.Text.Json;
+
+namespace LanMountainDesktop.PluginSdk;
+
+public sealed record PluginManifest(
+    string Id,
+    string Name,
+    string EntranceAssembly,
+    string? Description = null,
+    string? Author = null,
+    string? Version = null,
+    string? ApiVersion = null)
+{
+    private static readonly JsonSerializerOptions SerializerOptions = new()
+    {
+        PropertyNameCaseInsensitive = true,
+        ReadCommentHandling = JsonCommentHandling.Skip,
+        AllowTrailingCommas = true
+    };
+
+    public static PluginManifest Load(string manifestPath)
+    {
+        ArgumentException.ThrowIfNullOrWhiteSpace(manifestPath);
+
+        using var stream = File.OpenRead(manifestPath);
+        return Load(stream, manifestPath);
+    }
+
+    public static PluginManifest Load(Stream stream, string sourceName)
+    {
+        ArgumentNullException.ThrowIfNull(stream);
+        ArgumentException.ThrowIfNullOrWhiteSpace(sourceName);
+
+        var manifest = JsonSerializer.Deserialize<PluginManifest>(stream, SerializerOptions);
+        if (manifest is null)
+        {
+            throw new InvalidOperationException($"Failed to deserialize plugin manifest '{sourceName}'.");
+        }
+
+        return manifest.NormalizeAndValidate(sourceName);
+    }
+
+    public string ResolveEntranceAssemblyPath(string manifestPath)
+    {
+        ArgumentException.ThrowIfNullOrWhiteSpace(manifestPath);
+
+        if (Path.IsPathRooted(EntranceAssembly))
+        {
+            return Path.GetFullPath(EntranceAssembly);
+        }
+
+        var manifestDirectory = Path.GetDirectoryName(Path.GetFullPath(manifestPath))
+            ?? throw new InvalidOperationException($"Failed to determine the directory of '{manifestPath}'.");
+
+        return Path.GetFullPath(Path.Combine(manifestDirectory, EntranceAssembly));
+    }
+
+    private PluginManifest NormalizeAndValidate(string manifestPath)
+    {
+        var normalized = this with
+        {
+            Id = RequireValue(Id, nameof(Id), manifestPath),
+            Name = RequireValue(Name, nameof(Name), manifestPath),
+            EntranceAssembly = RequireValue(EntranceAssembly, nameof(EntranceAssembly), manifestPath),
+            Description = NormalizeOptionalValue(Description),
+            Author = NormalizeOptionalValue(Author),
+            Version = NormalizeOptionalValue(Version),
+            ApiVersion = NormalizeOptionalValue(ApiVersion) ?? PluginSdkInfo.ApiVersion
+        };
+
+        if (!System.Version.TryParse(normalized.ApiVersion, out var requestedVersion))
+        {
+            throw new InvalidOperationException(
+                $"Plugin manifest '{manifestPath}' declares an invalid API version '{normalized.ApiVersion}'.");
+        }
+
+        if (!System.Version.TryParse(PluginSdkInfo.ApiVersion, out var currentVersion))
+        {
+            throw new InvalidOperationException($"Plugin SDK API version '{PluginSdkInfo.ApiVersion}' is invalid.");
+        }
+
+        if (requestedVersion.Major != currentVersion.Major)
+        {
+            throw new InvalidOperationException(
+                $"Plugin '{normalized.Id}' targets API version '{normalized.ApiVersion}', but the host provides '{PluginSdkInfo.ApiVersion}'.");
+        }
+
+        return normalized;
+    }
+
+    private static string RequireValue(string? value, string propertyName, string manifestPath)
+    {
+        var normalized = NormalizeOptionalValue(value);
+        if (string.IsNullOrWhiteSpace(normalized))
+        {
+            throw new InvalidOperationException(
+                $"Plugin manifest '{manifestPath}' is missing required property '{propertyName}'.");
+        }
+
+        return normalized;
+    }
+
+    private static string? NormalizeOptionalValue(string? value)
+    {
+        return string.IsNullOrWhiteSpace(value) ? null : value.Trim();
+    }
+}

LanMountainDesktop.PluginSdk/PluginPackageInstallResult.cs

@@ -0,0 +1,6 @@
+namespace LanMountainDesktop.PluginSdk;
+
+public sealed record PluginPackageInstallResult(
+    PluginManifest Manifest,
+    bool ReplacedExisting,
+    bool RestartRequired);

LanMountainDesktop.PluginSdk/PluginSdkInfo.cs

@@ -0,0 +1,12 @@
+namespace LanMountainDesktop.PluginSdk;
+
+public static class PluginSdkInfo
+{
+    public const string ApiVersion = "1.0.0";
+    public const string ManifestFileName = "plugin.json";
+    public const string PackageFileExtension = ".laapp";
+    public const string DataDirectoryName = "Data";
+    public const string RuntimeDirectoryName = ".runtime";
+    public const string ExtractedPackagesDirectoryName = "packages";
+    public const string PackagedDataDirectoryName = "data";
+}

LanMountainDesktop.PluginSdk/PluginSettingsPageRegistration.cs

@@ -0,0 +1,30 @@
+using Avalonia.Controls;
+
+namespace LanMountainDesktop.PluginSdk;
+
+public sealed class PluginSettingsPageRegistration
+{
+    public PluginSettingsPageRegistration(
+        string id,
+        string title,
+        Func<Control> contentFactory,
+        int sortOrder = 0)
+    {
+        ArgumentException.ThrowIfNullOrWhiteSpace(id);
+        ArgumentException.ThrowIfNullOrWhiteSpace(title);
+        ArgumentNullException.ThrowIfNull(contentFactory);
+
+        Id = id.Trim();
+        Title = title.Trim();
+        ContentFactory = contentFactory;
+        SortOrder = sortOrder;
+    }
+
+    public string Id { get; }
+
+    public string Title { get; }
+
+    public int SortOrder { get; }
+
+    public Func<Control> ContentFactory { get; }
+}

LanMountainDesktop.sln

@@ -5,6 +5,12 @@ VisualStudioVersion = 17.0.31903.59
 MinimumVisualStudioVersion = 10.0.40219.1
 Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "LanMountainDesktop", "LanMountainDesktop\LanMountainDesktop.csproj", "{00000001-0000-0000-0000-000000000001}"
 EndProject
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "LanMountainDesktop.SamplePlugin", "LanAirApp\samples\LanMountainDesktop.SamplePlugin\LanMountainDesktop.SamplePlugin.csproj", "{BDCD028D-DB6E-4BD5-994A-65889DBDEE0C}"
+EndProject
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "LanMountainDesktop.PluginPackager", "LanAirApp\tools\LanMountainDesktop.PluginPackager\LanMountainDesktop.PluginPackager.csproj", "{AAE8578B-1F9D-4D4F-8B2E-0A98C55B0C31}"
+EndProject
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "LanMountainDesktop.PluginSdk", "LanMountainDesktop.PluginSdk\LanMountainDesktop.PluginSdk.csproj", "{30A0F689-AACC-48C8-8BFE-BC7BFBA6CC55}"
+EndProject
 Global
 	GlobalSection(SolutionConfigurationPlatforms) = preSolution
 		Debug|Any CPU = Debug|Any CPU
@@ -15,5 +21,17 @@ Global
 		{00000001-0000-0000-0000-000000000001}.Debug|Any CPU.Build.0 = Debug|Any CPU
 		{00000001-0000-0000-0000-000000000001}.Release|Any CPU.ActiveCfg = Release|Any CPU
 		{00000001-0000-0000-0000-000000000001}.Release|Any CPU.Build.0 = Release|Any CPU
+		{BDCD028D-DB6E-4BD5-994A-65889DBDEE0C}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{BDCD028D-DB6E-4BD5-994A-65889DBDEE0C}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{BDCD028D-DB6E-4BD5-994A-65889DBDEE0C}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{BDCD028D-DB6E-4BD5-994A-65889DBDEE0C}.Release|Any CPU.Build.0 = Release|Any CPU
+		{AAE8578B-1F9D-4D4F-8B2E-0A98C55B0C31}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{AAE8578B-1F9D-4D4F-8B2E-0A98C55B0C31}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{AAE8578B-1F9D-4D4F-8B2E-0A98C55B0C31}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{AAE8578B-1F9D-4D4F-8B2E-0A98C55B0C31}.Release|Any CPU.Build.0 = Release|Any CPU
+		{30A0F689-AACC-48C8-8BFE-BC7BFBA6CC55}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{30A0F689-AACC-48C8-8BFE-BC7BFBA6CC55}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{30A0F689-AACC-48C8-8BFE-BC7BFBA6CC55}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{30A0F689-AACC-48C8-8BFE-BC7BFBA6CC55}.Release|Any CPU.Build.0 = Release|Any CPU
 	EndGlobalSection
 EndGlobal

LanMountainDesktop/App.axaml

@@ -16,21 +16,6 @@
         <local:ViewLocator/>
     </Application.DataTemplates>
 
-    <TrayIcon.Icons>
-        <TrayIcons>
-            <TrayIcon Icon="/Assets/avalonia-logo.ico"
-                      ToolTipText="LanMountainDesktop">
-                <TrayIcon.Menu>
-                    <NativeMenu>
-                        <NativeMenuItem Header="重启应用" Click="OnTrayRestartClick" />
-                        <NativeMenuItemSeparator />
-                        <NativeMenuItem Header="退出应用" Click="OnTrayExitClick" />
-                    </NativeMenu>
-                </TrayIcon.Menu>
-            </TrayIcon>
-        </TrayIcons>
-    </TrayIcon.Icons>
-  
     <Application.Styles>
         <sty:FluentAvaloniaTheme />
         <mi:MaterialIconStyles />

LanMountainDesktop/App.axaml.cs

@@ -1,11 +1,13 @@
-using Avalonia;
+using Avalonia;
+using Avalonia.Controls;
 using Avalonia.Controls.ApplicationLifetimes;
 using Avalonia.Data.Core;
 using Avalonia.Data.Core.Plugins;
 using System;
-using System.Diagnostics;
 using System.Linq;
 using Avalonia.Markup.Xaml;
+using Avalonia.Platform;
+using Avalonia.Threading;
 using LanMountainDesktop.Services;
 using LanMountainDesktop.ViewModels;
 using LanMountainDesktop.Views;
@@ -15,8 +17,18 @@ namespace LanMountainDesktop;
 
 public partial class App : Application
 {
+    private readonly AppSettingsService _appSettingsService = new();
+    private readonly LocalizationService _localizationService = new();
+
+    private SettingsWindow? _traySettingsWindow;
+    private TrayIcons? _trayIcons;
+    private PluginRuntimeService? _pluginRuntimeService;
+
+    public PluginRuntimeService? PluginRuntimeService => _pluginRuntimeService;
+
     public override void Initialize()
     {
+        AppLogger.Info("App", "Initializing application resources.");
         ConfigureWebViewUserDataFolder();
         AvaloniaWebViewBuilder.Initialize(default);
         AvaloniaXamlLoader.Load(this);
@@ -24,17 +36,29 @@ public partial class App : Application
 
     public override void OnFrameworkInitializationCompleted()
     {
+        AppLogger.Info("App", "Framework initialization completed.");
         LinuxDesktopEntryInstaller.EnsureInstalled();
+        InitializePluginRuntime();
+        AppSettingsService.SettingsSaved += OnAppSettingsSaved;
+        InitializeTrayIcon();
 
         if (ApplicationLifetime is IClassicDesktopStyleApplicationLifetime desktop)
         {
-            // Avoid duplicate validations from both Avalonia and the CommunityToolkit. 
+            // Avoid duplicate validations from both Avalonia and the CommunityToolkit.
             // More info: https://docs.avaloniaui.net/docs/guides/development-guides/data-validation#manage-validationplugins
             DisableAvaloniaDataAnnotationValidation();
+            desktop.ShutdownMode = Avalonia.Controls.ShutdownMode.OnExplicitShutdown;
+            desktop.Exit += (_, _) =>
+            {
+                AppLogger.Info("App", "Desktop lifetime exit triggered.");
+                AppSettingsService.SettingsSaved -= OnAppSettingsSaved;
+                DisposeTrayIcon();
+            };
             desktop.MainWindow = new MainWindow
             {
                 DataContext = new MainWindowViewModel(),
             };
+            AppLogger.Info("App", $"Main window created. LogFile={AppLogger.LogFilePath}");
         }
 
         base.OnFrameworkInitializationCompleted();
@@ -42,53 +66,66 @@ public partial class App : Application
 
     private void OnTrayExitClick(object? sender, EventArgs e)
     {
+        DisposeTrayIcon();
+
         if (ApplicationLifetime is IClassicDesktopStyleApplicationLifetime desktop)
         {
             desktop.Shutdown();
         }
     }
 
-    private void OnTrayRestartClick(object? sender, EventArgs e)
+    private void OnTraySettingsClick(object? sender, EventArgs e)
     {
-        if (ApplicationLifetime is not IClassicDesktopStyleApplicationLifetime desktop)
+        if (ApplicationLifetime is not IClassicDesktopStyleApplicationLifetime)
         {
             return;
         }
 
-        if (TryStartCurrentProcess())
+        Dispatcher.UIThread.Post(() =>
         {
-            desktop.Shutdown();
-        }
+            try
+            {
+                if (_traySettingsWindow is { } existingWindow && existingWindow.IsVisible)
+                {
+                    existingWindow.WindowState = Avalonia.Controls.WindowState.Normal;
+                    existingWindow.Activate();
+                    return;
+                }
+
+                var settingsWindow = new SettingsWindow();
+                settingsWindow.Closed += (_, _) =>
+                {
+                    if (ReferenceEquals(_traySettingsWindow, settingsWindow))
+                    {
+                        _traySettingsWindow = null;
+                    }
+                };
+
+                _traySettingsWindow = settingsWindow;
+                settingsWindow.Show();
+                settingsWindow.Activate();
+            }
+            catch (Exception ex)
+            {
+                AppLogger.Warn("TraySettings", "Failed to open settings window.", ex);
+            }
+        }, DispatcherPriority.Normal);
     }
 
-    private static bool TryStartCurrentProcess()
+    private void OnTrayRestartClick(object? sender, EventArgs e)
     {
-        try
+        AppRestartService.TryRestartApplication();
+    }
+
+    private void OnAppSettingsSaved(string _)
+    {
+        Dispatcher.UIThread.Post(() =>
         {
-            var args = Environment.GetCommandLineArgs();
-            if (args.Length == 0 || string.IsNullOrWhiteSpace(args[0]))
+            if (_trayIcons is not null)
             {
-                return false;
+                InitializeTrayIcon();
             }
-
-            var startInfo = new ProcessStartInfo
-            {
-                FileName = args[0],
-                UseShellExecute = false
-            };
-
-            for (var i = 1; i < args.Length; i++)
-            {
-                startInfo.ArgumentList.Add(args[i]);
-            }
-
-            Process.Start(startInfo);
-            return true;
-        }
-        catch
-        {
-            return false;
-        }
+        }, DispatcherPriority.Background);
     }
 
     private void DisableAvaloniaDataAnnotationValidation()
@@ -125,9 +162,94 @@ public partial class App : Application
                 userDataFolder,
                 EnvironmentVariableTarget.Process);
         }
-        catch
+        catch (Exception ex)
         {
             // Keep startup resilient if user profile folders are unavailable.
+            AppLogger.Warn("WebView2", "Failed to configure WebView2 user data folder.", ex);
         }
     }
+
+    private void InitializePluginRuntime()
+    {
+        try
+        {
+            _pluginRuntimeService?.Dispose();
+            _pluginRuntimeService = new PluginRuntimeService();
+            _pluginRuntimeService.LoadInstalledPlugins();
+        }
+        catch (Exception ex)
+        {
+            AppLogger.Warn("PluginRuntime", "Failed to initialize plugin runtime.", ex);
+        }
+    }
+
+    private void InitializeTrayIcon()
+    {
+        try
+        {
+            DisposeTrayIcon();
+
+            using var iconStream = AssetLoader.Open(new Uri("avares://LanMountainDesktop/Assets/avalonia-logo.ico"));
+            var trayIcon = new TrayIcon
+            {
+                Icon = new WindowIcon(iconStream),
+                ToolTipText = L("tray.tooltip", "LanMountainDesktop"),
+                Menu = BuildTrayMenu(),
+                IsVisible = true
+            };
+
+            _trayIcons = [trayIcon];
+            TrayIcon.SetIcons(this, _trayIcons);
+        }
+        catch (Exception ex)
+        {
+            AppLogger.Warn("TrayIcon", "Failed to initialize tray icon.", ex);
+        }
+    }
+
+    private NativeMenu BuildTrayMenu()
+    {
+        var menu = new NativeMenu();
+
+        var settingsItem = new NativeMenuItem(L("tray.menu.settings", "设置"));
+        settingsItem.Click += OnTraySettingsClick;
+        menu.Items.Add(settingsItem);
+
+        menu.Items.Add(new NativeMenuItemSeparator());
+
+        var restartItem = new NativeMenuItem(L("tray.menu.restart", "重启应用"));
+        restartItem.Click += OnTrayRestartClick;
+        menu.Items.Add(restartItem);
+
+        menu.Items.Add(new NativeMenuItemSeparator());
+
+        var exitItem = new NativeMenuItem(L("tray.menu.exit", "退出应用"));
+        exitItem.Click += OnTrayExitClick;
+        menu.Items.Add(exitItem);
+
+        return menu;
+    }
+
+    private void DisposeTrayIcon()
+    {
+        if (_trayIcons is null)
+        {
+            return;
+        }
+
+        TrayIcon.SetIcons(this, null);
+        foreach (var trayIcon in _trayIcons)
+        {
+            trayIcon.Dispose();
+        }
+
+        _trayIcons = null;
+    }
+
+    private string L(string key, string fallback)
+    {
+        var snapshot = _appSettingsService.Load();
+        var languageCode = _localizationService.NormalizeLanguageCode(snapshot.LanguageCode);
+        return _localizationService.GetString(languageCode, key, fallback);
+    }
 }

LanMountainDesktop/Assets/Fonts/MiSans-NOTICE.md

@@ -1,22 +1,35 @@
-# MiSans Font Notice
+# MiSans 字体说明
 
-This app bundles MiSans fonts for consistent cross-device rendering.
+## 中文
 
-## Included files
+本项目内置 MiSans 字体，用于在不同设备上保持相对一致的文字渲染效果。
+
+### 包含文件
 
 - `MiSans-Regular.ttf`
 - `MiSans-Semibold.ttf`
 - `MiSans-Bold.ttf`
 
-## Source
+### 来源
+
+- 上游仓库：https://github.com/dsrkafuu/misans
+- 上游所引用的小米字体页面：https://hyperos.mi.com/font/zh/
+
+### 许可与使用说明
+
+- 上游脚本或打包仓库使用 Apache-2.0 许可。
+- MiSans 字体本身的版权和补充使用条款以小米官方说明为准：
+  - https://hyperos.mi.com/font-download/MiSans%E5%AD%97%E4%BD%93%E7%9F%A5%E8%AF%86%E4%BA%A7%E6%9D%83%E8%AE%B8%E5%8F%AF%E5%8D%8F%E8%AE%AE.pdf
+
+在重新分发本项目时，请自行确认并遵守 MiSans 字体的相关条款。
+
+## English
+
+This project bundles MiSans fonts for more consistent cross-device rendering.
+
+### Sources
 
 - Upstream package repository: https://github.com/dsrkafuu/misans
-- Original font source referenced by upstream: https://hyperos.mi.com/font/zh/
+- Xiaomi font source page: https://hyperos.mi.com/font/zh/
 
-## License and usage notes
-
-- Script/package license in upstream repository: Apache-2.0
-- MiSans font copyright and additional usage terms:
-  https://hyperos.mi.com/font-download/MiSans%E5%AD%97%E4%BD%93%E7%9F%A5%E8%AF%86%E4%BA%A7%E6%9D%83%E8%AE%B8%E5%8F%AF%E5%8D%8F%E8%AE%AE.pdf
-
-Please review and comply with the MiSans font terms when distributing this app.
+Please review and comply with the MiSans font terms before redistributing this application.

LanMountainDesktop/Assets/Weather/ATTRIBUTION.md

@@ -1,9 +1,12 @@
-# Weather Background Assets
+# 天气背景资源署名
 
-Weather card background images are sourced from **Pexels** and used under the Pexels license:
-https://www.pexels.com/license/
+## 中文
 
-## Sources
+本目录中的天气背景图像主要来自 **Pexels**，并按 Pexels License 使用：
+
+- License: https://www.pexels.com/license/
+
+### 原始来源
 
 - `clear_sky.jpg`
   - https://www.pexels.com/photo/a-clear-blue-sky-with-few-clouds-on-a-sunny-day-29390199/
@@ -14,16 +17,24 @@ https://www.pexels.com/license/
 - `storm.jpg`
   - https://www.pexels.com/photo/sea-under-a-stormy-sky-4609228/
 
-## Derived Variants (for widget scene mapping)
+### 派生资源
 
-The following files are generated from the above base assets by color grading/brightness adjustments to match the ColorOS-like weather card style:
+以下文件由上述基础图片经过色彩、亮度或风格调整后生成，用于适配阑山桌面的天气组件视觉：
 
-- `clear_day.jpg` (from `clear_sky.jpg`)
-- `clear_night.jpg` (from `clear_sky.jpg`)
-- `cloudy_day.jpg` (from `clear_sky.jpg`)
-- `cloudy_night.jpg` (from `clear_sky.jpg`)
-- `rain_light.jpg` (from `rain.jpg`)
-- `rain_heavy.jpg` (from `rain.jpg`)
-- `storm_dark.jpg` (from `storm.jpg`)
-- `fog_haze.jpg` (from `storm.jpg`)
-- `snow_soft.jpg` (from `snow.jpg`)
+- `clear_day.jpg`
+- `clear_night.jpg`
+- `cloudy_day.jpg`
+- `cloudy_night.jpg`
+- `rain_light.jpg`
+- `rain_heavy.jpg`
+- `storm_dark.jpg`
+- `fog_haze.jpg`
+- `snow_soft.jpg`
+
+## English
+
+The weather background images in this directory are primarily sourced from **Pexels** and used under the Pexels License:
+
+- License: https://www.pexels.com/license/
+
+Derived variants in this repository are adjusted from the listed base assets for widget presentation.

LanMountainDesktop/Assets/Weather/HyperOS3/ATTRIBUTION.md

@@ -1,45 +1,23 @@
-# HyperOS3 Weather Assets (Official Xiaomi Package)
+# HyperOS3 天气资源署名
+
+## 中文
+
+本目录中的 HyperOS3 风格天气资源来自用户提供的 Xiaomi Weather 安装包提取内容，以及基于该视觉方向制作的项目内派生资源。
+
+### 提取来源
 
-These assets were extracted from the official Xiaomi Weather APK provided by the user:
 - Source APK: `c:\Program Files\Netease\GameViewer\Download\MI SKY 12.apk`
-- Package: `com.miui.weather2` (Mi Weather)
-- Extraction date: 2026-03-03
+- Package: `com.miui.weather2`
+- Extraction date: `2026-03-03`
 
-Extracted source paths inside APK:
-- `assets/map_custom/particle/sun_0.png` -> `hyper_sun_core.png`
-- `assets/map_custom/particle/sun_1.png` -> `hyper_sun_ring.png`
-- `assets/map_custom/particle/fog.png` -> `hyper_fog.png`
-- `assets/map_custom/particle/haze.png` -> `hyper_haze.png`
-- `assets/map_custom/particle/rain.png` -> `hyper_rain_drop.png`
-- `assets/map_custom/particle/snow.png` -> `hyper_snow_flake.png`
-- `assets/map_custom/skybox/top.png` -> `hyper_sky_top.png`
-- `assets/map_custom/skybox/back.png` -> `hyper_sky_back.png`
-- `assets/map_custom/skybox/front.png` -> `hyper_sky_front.png`
-- `assets/map_custom/skybox/left.png` -> `hyper_sky_left.png`
-- `assets/map_custom/skybox/right.png` -> `hyper_sky_right.png`
-- `assets/map_custom/skybox/bottom.png` -> `hyper_sky_bottom.png`
-- `assets/map_assets/VM3DRes/cross_sky_day.png` -> `hyper_cross_sky_day.png`
-- `assets/map_assets/VM3DRes/cross_sky_night.png` -> `hyper_cross_sky_night.png`
+### 用途说明
 
-Extracted weather icon paths inside APK (`res/*.webp`):
-- `res/aO.webp` -> `Icons/icon_sunny_day.webp`
-- `res/k2.webp` -> `Icons/icon_moon_clear.webp`
-- `res/Ip.webp` -> `Icons/icon_partly_cloudy_day.webp`
-- `res/HI.webp` -> `Icons/icon_partly_cloudy_night.webp`
-- `res/E4.webp` -> `Icons/icon_cloudy.webp`
-- `res/5f.webp` -> `Icons/icon_rain_light.webp`
-- `res/fO.webp` -> `Icons/icon_rain_heavy.webp`
-- `res/lV1.webp` -> `Icons/icon_thunder.webp`
-- `res/mH1.webp` -> `Icons/icon_snow.webp`
-- `res/jB.webp` -> `Icons/icon_sleet.webp`
-- `res/Wl.webp` -> `Icons/icon_haze.webp`
-- `res/Mg.webp` -> `Icons/icon_windy.webp`
+- 这些资源仅用于项目内部视觉研究、原型还原和界面适配。
+- 使用时应遵守小米相关许可与使用条款。
 
-Use only according to Xiaomi's applicable license and usage terms.
+### 额外派生资源
 
-## Soft Widget Icon Set (2026-03-05)
-
-To better match the Xiaomi weather time-card visual hierarchy, an additional local icon set was generated for this project:
+以下文件为项目内基于上述视觉方向制作的派生素材：
 
 - `Icons/icon_hero_sun_soft.png`
 - `Icons/icon_hero_moon_soft.png`
@@ -52,4 +30,8 @@ To better match the Xiaomi weather time-card visual hierarchy, an additional loc
 - `Icons/icon_mini_snow_soft.png`
 - `Icons/icon_mini_fog_soft.png`
 
-These files are original derivative assets generated in-repo with local tooling, using the extracted Xiaomi package visual direction as reference (soft glow hero icon + lightweight forecast icons).
+## English
+
+The HyperOS3-style weather assets in this directory were extracted from a Xiaomi Weather APK provided by the user, together with additional derivative assets created in-repo to match the same visual direction.
+
+Use these resources only in accordance with Xiaomi's applicable license and usage terms.

LanMountainDesktop/ComponentSystem/ComponentRegistry.cs

@@ -385,6 +385,13 @@ public sealed class ComponentRegistry
         return new ComponentRegistry(merged);
     }
 
+    public ComponentRegistry RegisterComponents(IEnumerable<DesktopComponentDefinition> definitions)
+    {
+        var merged = _definitions.Values.ToList();
+        merged.AddRange(definitions);
+        return new ComponentRegistry(merged);
+    }
+
     public bool TryGetDefinition(string componentId, out DesktopComponentDefinition definition)
     {
         return _definitions.TryGetValue(componentId, out definition!);

LanMountainDesktop/ComponentSystem/DesktopComponentRuntimeContext.cs

@@ -0,0 +1,8 @@
+using LanMountainDesktop.Services;
+
+namespace LanMountainDesktop.ComponentSystem;
+
+public sealed record DesktopComponentRuntimeContext(
+    string ComponentId,
+    string? PlacementId,
+    IComponentInstanceSettingsStore ComponentSettingsStore);

LanMountainDesktop/ComponentSystem/IComponentPlacementContextAware.cs

@@ -0,0 +1,6 @@
+namespace LanMountainDesktop.ComponentSystem;
+
+public interface IComponentPlacementContextAware
+{
+    void SetComponentPlacementContext(string componentId, string? placementId);
+}

LanMountainDesktop/ComponentSystem/IComponentRuntimeContextAware.cs

@@ -0,0 +1,6 @@
+namespace LanMountainDesktop.ComponentSystem;
+
+public interface IComponentRuntimeContextAware
+{
+    void SetComponentRuntimeContext(DesktopComponentRuntimeContext context);
+}

LanMountainDesktop/ComponentSystem/IComponentSettingsStoreAware.cs

@@ -0,0 +1,8 @@
+using LanMountainDesktop.Services;
+
+namespace LanMountainDesktop.ComponentSystem;
+
+public interface IComponentSettingsStoreAware
+{
+    void SetComponentSettingsStore(IComponentInstanceSettingsStore settingsStore);
+}

LanMountainDesktop/ComponentSystem/README.md

@@ -1,77 +1,38 @@
-# 组件系统模块（Component System Module）
+# 组件系统说明
 
-本目录提供组件系统的模块化基础，用于支持内置组件管理与第三方扩展接入。  
-This directory provides the modular foundation for built-in component management and third-party extension integration.
+## 中文
 
-## 核心文件职责（Core Files）
-- `BuiltInComponentIds.cs`：内置组件 ID 常量（例如 `Clock`）。  
-  Built-in component ID constants (for example `Clock`).
-- `DesktopComponentDefinition.cs`：组件元数据定义（名称、类别、最小尺寸、可放置区域等）。  
-  Component metadata model (name, category, minimum size, placement permissions).
-- `ComponentPlacementRules.cs`：组件放置规则（最小尺寸、状态栏高度限制、网格边界约束）。  
-  Placement rules (minimum size, status-bar height rule, grid clamping).
-- `ComponentRegistry.cs`：组件注册中心，负责内置组件与扩展组件合并。  
-  Registry that merges built-in and extension components.
-- `Extensions/IComponentExtensionProvider.cs`：扩展提供者接口契约。  
-  Extension provider interface contract.
-- `Extensions/JsonComponentExtensionProvider.cs`：基于 JSON 的扩展加载器。  
-  JSON-based extension loader.
+`ComponentSystem/` 提供阑山桌面组件定义、注册和扩展的基础能力。
 
-## 第三方扩展契约（Extension Contract）
-- 第三方可通过实现 `IComponentExtensionProvider` 提供组件定义。  
-  Third parties can provide component definitions via `IComponentExtensionProvider`.
-- 当前内置了 JSON 提供者，运行时扫描目录：  
-  Built-in JSON provider scans at runtime:
-  - `Extensions/Components/*.json`（相对应用输出目录）  
-    `Extensions/Components/*.json` (relative to app output directory)
+### 主要职责
 
-## 加载流程（Load Flow）
-1. `ComponentRegistry.CreateDefault()` 先注册内置组件。  
-   Register built-in components first via `ComponentRegistry.CreateDefault()`.
-2. 调用 `.RegisterExtensions(...)` 合并扩展组件。  
-   Merge extension components via `.RegisterExtensions(...)`.
-3. 主窗口通过注册中心校验组件合法性与放置权限。  
-   Main window validates component identity and placement permission through the registry.
+- 管理内置组件 ID 和元数据
+- 约束组件最小尺寸与可放置区域
+- 合并内置组件与扩展组件
+- 通过 JSON 或扩展提供者接入第三方组件
 
-## JSON 清单格式（Manifest Schema）
-JSON 文件为数组，每一项代表一个组件定义。  
-The JSON file is an array, where each item represents one component definition.
+### 关键文件
 
-```json
-[
-  {
-    "id": "Weather",
-    "displayName": "Weather",
-    "iconKey": "WeatherSunny",
-    "category": "Status",
-    "minWidthCells": 1,
-    "minHeightCells": 1,
-    "allowStatusBarPlacement": true,
-    "allowDesktopPlacement": true
-  }
-]
-```
+- `BuiltInComponentIds.cs`：内置组件 ID 常量
+- `DesktopComponentDefinition.cs`：组件元数据模型
+- `ComponentPlacementRules.cs`：放置规则
+- `ComponentRegistry.cs`：组件注册中心
+- `Extensions/IComponentExtensionProvider.cs`：扩展提供者接口
+- `Extensions/JsonComponentExtensionProvider.cs`：JSON 扩展加载器
 
-字段说明（Field notes）：
-- `id`：组件唯一 ID（建议英文、稳定不变）。  
-  Unique component ID (prefer stable English key).
-- `displayName`：显示名。  
-  Display name.
-- `iconKey`：图标键（由上层 UI 解释）。  
-  Icon key resolved by UI layer.
-- `category`：组件分类。  
-  Component category.
-- `minWidthCells` / `minHeightCells`：最小占格，必须满足 `>= 1`。  
-  Minimum cell size, must satisfy `>= 1`.
-- `allowStatusBarPlacement`：是否允许放到顶部状态栏。  
-  Whether placing in top status bar is allowed.
-- `allowDesktopPlacement`：是否允许放到桌面区域。  
-  Whether placing in desktop area is allowed.
+### 扩展方式
 
-## 放置规则摘要（Placement Rules Summary）
-- 最小尺寸约束：`minWidthCells >= 1` 且 `minHeightCells >= 1`。  
-  Minimum size constraint: `minWidthCells >= 1` and `minHeightCells >= 1`.
-- 状态栏约束：状态栏组件高度必须为 `1` 格。  
-  Status bar constraint: component height must be exactly `1` cell.
-- 越界约束：所有组件坐标会被网格边界钳制（clamp）。  
-  Out-of-bounds constraint: component coordinates are clamped to grid bounds.
+- 当前默认扫描 `Extensions/Components/*.json`
+- 组件清单定义显示名、分类、最小尺寸和可放置区域
+- 主程序通过注册中心统一验证组件是否合法
+
+## English
+
+`ComponentSystem/` contains the foundation for component definition, registration, and extension in LanMountainDesktop.
+
+### Responsibilities
+
+- manage built-in component IDs and metadata
+- enforce placement rules
+- merge built-in and extension components
+- support third-party registration through JSON or provider contracts

LanMountainDesktop/LanMountainDesktop.csproj

@@ -24,6 +24,10 @@
     <None Include="Extensions\Components\*.json" CopyToOutputDirectory="PreserveNewest" />
   </ItemGroup>
 
+  <ItemGroup>
+    <ProjectReference Include="..\LanMountainDesktop.PluginSdk\LanMountainDesktop.PluginSdk.csproj" />
+  </ItemGroup>
+
   <ItemGroup>
     <PackageReference Include="Avalonia" Version="11.3.12" />
     <PackageReference Include="Avalonia.Desktop" Version="11.3.12" />
@@ -36,6 +40,7 @@
     </PackageReference>
     <PackageReference Include="CommunityToolkit.Mvvm" Version="8.2.1" />
     <PackageReference Include="DotNetCampus.AvaloniaInkCanvas" Version="1.0.1" />
+    <PackageReference Include="Downloader" Version="4.1.1" />
     <PackageReference Include="FluentAvaloniaUI" Version="2.5.0" />
     <PackageReference Include="FluentIcons.Avalonia" Version="2.0.319" />
     <PackageReference Include="FluentIcons.Avalonia.Fluent" Version="2.0.319" />

LanMountainDesktop/Localization/en-US.json

@@ -1,11 +1,22 @@
 {
     "app.title":  "LanMountainDesktop",
+    "tray.tooltip":  "LanMountainDesktop",
+    "tray.menu.settings":  "Settings",
+    "tray.menu.restart":  "Restart App",
+    "tray.menu.exit":  "Exit App",
     "button.back_to_windows":  "Back to Windows",
     "tooltip.back_to_windows":  "Back to Windows",
     "tooltip.open_settings":  "Settings",
     "settings.title":  "Settings",
+    "settings.shell.title":  "Application Settings",
+    "settings.shell.subtitle":  "LanMountainDesktop standalone preferences",
+    "settings.shell.sidebar_hint":  "Choose a category to adjust application behavior, desktop layout, and appearance.",
+    "settings.shell.footer_hint":  "Tray-opened settings are managed in this standalone window.",
     "settings.back_to_desktop":  "Back to Desktop",
     "settings.nav_header":  "Settings",
+    "settings.nav.group_desktop":  "Desktop",
+    "settings.nav.group_system":  "System",
+    "settings.nav.group_extensions":  "Extensions",
     "settings.nav.wallpaper":  "Wallpaper",
     "settings.nav.grid":  "Grid",
     "settings.nav.color":  "Color",
@@ -109,6 +120,8 @@
     "settings.weather.preview_header":  "Connection Test",
     "settings.weather.preview_desc":  "Send one test request to verify current settings.",
     "settings.weather.preview_button":  "Test Fetch",
+    "settings.weather.preview_section":  "Weather Preview",
+    "settings.weather.settings_section":  "Settings",
     "settings.weather.preview_panel_header":  "Weather Preview",
     "settings.weather.preview_panel_desc":  "Refresh and verify current weather service status.",
     "settings.weather.refresh_button":  "Refresh",
@@ -129,6 +142,15 @@
     "settings.weather.status_city_empty":  "No city location is configured.",
     "settings.weather.status_city_format":  "Mode: {0} | {1} | Key: {2}",
     "settings.weather.status_coordinates_format":  "Mode: {0} | Lat {1:F4}, Lon {2:F4} | Key: {3}",
+    "settings.weather.city_selection_label":  "City Selection",
+    "settings.weather.coordinates_selection_label":  "Coordinate Location",
+    "settings.weather.location_city_summary_desc":  "Select the current city used for weather queries.",
+    "settings.weather.location_coordinates_summary_desc":  "Set latitude/longitude and optional location name used for weather queries.",
+    "settings.weather.location_not_selected":  "No location selected",
+    "settings.weather.alert_list_label":  "Exclude List",
+    "settings.weather.alert_list_desc":  "One exclusion rule per line.",
+    "settings.weather.no_tls_toggle":  "Allow non-TLS request fallback",
+    "settings.weather.footer_hint":  "Desktop weather widgets will reuse the location and alert exclusion settings configured here.",
     "settings.weather.location_header":  "Weather Location",
     "settings.weather.location_desc":  "Set the location used by weather widgets.",
     "settings.weather.location_placeholder":  "e.g. Beijing",
@@ -237,6 +259,25 @@
     "settings.about.startup_header":  "Windows Startup",
     "settings.about.startup_desc":  "Launch the app automatically when signing in to Windows.",
     "settings.about.startup_toggle":  "Launch at Windows sign-in",
+    "settings.about.render_mode_header":  "App Rendering Mode",
+    "settings.about.render_mode_desc":  "Choose the rendering backend. Restart the app after changing this option. Unsupported modes fall back to software.",
+    "settings.about.render_mode.default":  "Default",
+    "settings.about.render_mode.software":  "Software",
+    "settings.about.render_mode.angle_egl":  "angleEgl",
+    "settings.about.render_mode.wgl":  "WGL",
+    "settings.about.render_mode.vulkan":  "Vulkan",
+    "settings.about.render_mode.unknown":  "Unknown",
+    "settings.about.render_mode.current_label":  "Current actual backend",
+    "settings.about.render_mode.current_format":  "Current backend: {0}",
+    "settings.about.render_mode.impl_format":  "Runtime implementation: {0}",
+    "settings.about.render_mode.impl_unavailable":  "Runtime implementation details are unavailable.",
+    "settings.restart_dialog.title":  "Restart required",
+    "settings.restart_dialog.render_mode_message":  "Restart the app to switch the rendering mode from \"{0}\" to \"{1}\". Restart now?",
+    "settings.restart_dialog.restart":  "Restart now",
+    "settings.restart_dialog.cancel":  "Cancel",
+    "settings.restart_dock.title":  "Restart required",
+    "settings.restart_dock.description":  "Some changes will take effect after restarting the app.",
+    "settings.restart_dock.button":  "Restart app",
     "settings.footer":  "LanMountainDesktop Settings",
     "filepicker.title":  "Select wallpaper",
     "filepicker.image_files":  "Image files",
@@ -265,12 +306,98 @@
     "settings.launcher.hidden_empty":  "No hidden items.",
     "settings.launcher.hidden_type_folder":  "Folder",
     "settings.launcher.hidden_type_shortcut":  "Shortcut",
-    "settings.launcher.restore_button":  "Show Again",
+    "settings.launcher.restore_button":  "Unhide",
     "settings.plugins.title":  "Plugins",
     "settings.plugins.runtime_header":  "Plugin Runtime",
-    "settings.plugins.runtime_desc":  "Manage plugin loading and backend isolation.",
-    "settings.plugins.runtime_hint":  "This page will host installed plugin management, permission review, and sandboxed backend runtime controls.",
-    "settings.plugins.runtime_status":  "Plugin management UI is not connected yet. Next step is wiring the loader, permissions, and worker isolation state into this panel.",
+    "settings.plugins.runtime_desc":  "Review plugin runtime state and load results.",
+    "settings.plugins.runtime_hint":  "This page shows discovery status, load results, and runtime diagnostics for installed plugins.",
+    "settings.plugins.runtime_status":  "Plugin runtime status will appear here after plugin discovery completes.",
+    "settings.plugins.installed_header":  "Installed Plugins",
+    "settings.plugins.installed_desc":  "Review installed plugins and remove them here.",
+    "settings.plugins.import_header":  "Install From Package",
+    "settings.plugins.import_desc":  "Open a .laapp package and stage it into the local plugin directory.",
+    "settings.plugins.restart_hint":  "Plugin installation and deletion changes take effect after restarting the app.",
+    "settings.plugins.empty":  "No plugins found.",
+    "settings.plugins.runtime_unavailable":  "Plugin runtime is not available.",
+    "settings.plugins.summary_format":  "Detected {0} plugin(s); enabled {1}; loaded {2}; settings pages {3}; widgets {4}; failures {5}.",
+    "settings.plugins.summary_item_format":  "{0}  v{1}  |  {2}",
+    "settings.plugins.state.enabled":  "Enabled",
+    "settings.plugins.state.enabled_failed":  "Enabled / failed to load",
+    "settings.plugins.state.disabled":  "Disabled",
+    "settings.plugins.state.loaded":  "Loaded",
+    "settings.plugins.state.load_failed":  "Load failed",
+    "settings.plugins.toggle_on":  "Enabled",
+    "settings.plugins.toggle_off":  "Disabled",
+    "settings.plugins.toggle_result_format":  "Plugin '{0}' was {1} for the next launch. Restart the app to apply page and widget changes.",
+    "settings.plugins.toggle_state_enabled":  "enabled",
+    "settings.plugins.toggle_state_disabled":  "disabled",
+    "settings.plugins.toggle_failed_detail_format":  "Failed to update plugin '{0}': {1}",
+    "settings.plugins.install_button":  "Open .laapp package",
+    "settings.plugins.install_unavailable":  "Plugin runtime is unavailable, so .laapp packages cannot be installed right now.",
+    "settings.plugins.install_hint_format":  "Open a .laapp package to install it into: {0}",
+    "settings.plugins.install_picker_title":  "Select plugin package",
+    "settings.plugins.install_file_type":  ".laapp plugin package",
+    "settings.plugins.install_picker_unavailable":  "Storage provider is unavailable.",
+    "settings.plugins.install_copy_failed":  "Failed to copy the selected .laapp package.",
+    "settings.plugins.install_success_format":  "Installed plugin '{0}'. Restart the app to apply newly added settings pages and widgets.",
+    "settings.plugins.install_failed_format":  "Failed to install plugin package: {0}",
+    "settings.plugins.delete_button":  "Delete plugin",
+    "settings.plugins.delete_success_format":  "Plugin '{0}' was staged for deletion. Restart the app to finish removing it.",
+    "settings.plugins.delete_failed_format":  "Failed to delete plugin: {0}",
+    "settings.plugins.delete_failed_detail_format":  "Failed to delete plugin '{0}': {1}",
+    "settings.plugins.publisher_format":  "Publisher: {0}",
+    "settings.plugins.publisher_unknown":  "Unknown publisher",
+    "settings.plugins.source_package":  ".laapp package",
+    "settings.plugins.source_manifest":  "Loose manifest",
+    "settings.plugins.subtitle_format":  "{0} | {1} | {2}",
+    "settings.plugins.detail_format":  "Settings pages: {0} | Widgets: {1}",
+    "settings.nav.plugin_market":  "Plugin Market",
+    "settings.plugin_market.title":  "Plugin Market",
+    "settings.plugin_market.subtitle":  "Browse plugins from the official LanAirApp source and stage installs.",
+    "settings.plugin_market.unavailable":  "Plugin runtime is not available, so the official market cannot be opened right now.",
+    "market.toolbar.search_placeholder":  "Search plugins",
+    "market.toolbar.refresh":  "Refresh",
+    "market.status.loading":  "Loading the official plugin market...",
+    "market.status.loaded_network_format":  "Loaded {0} plugin(s) from the official source.",
+    "market.status.loaded_cache_format":  "Official source unavailable. Loaded {0} plugin(s) from cache. Reason: {1}",
+    "market.status.load_failed_format":  "Failed to load the plugin market: {0}",
+    "market.status.installing_format":  "Downloading and staging plugin '{0}'...",
+    "market.status.install_success_format":  "Plugin '{0}' has been staged. Restart the app to apply it.",
+    "market.status.install_failed_format":  "Failed to install plugin: {0}",
+    "market.status.host_incompatible_format":  "This host is too old. Version {0} or newer is required.",
+    "market.list.empty":  "The plugin market has not been loaded yet.",
+    "market.list.no_results":  "No plugins match the current search.",
+    "market.card.subtitle_format":  "{0} | v{1}",
+    "market.card.loaded":  "Loaded",
+    "market.card.pending_restart":  "Restart required",
+    "market.detail.placeholder":  "Select a plugin on the left to inspect details.",
+    "market.detail.author":  "Author",
+    "market.detail.version":  "Version",
+    "market.detail.api_version":  "API Version",
+    "market.detail.min_host_version":  "Minimum Host Version",
+    "market.detail.installed_version":  "Installed Version",
+    "market.detail.not_installed":  "Not installed",
+    "market.detail.readme":  "README",
+    "market.detail.plugin_information":  "Plugin Information",
+    "market.detail.author_subtitle_format":  "By {0}",
+    "market.detail.package_size":  "Package Size",
+    "market.detail.published_at":  "Published At",
+    "market.detail.updated_at":  "Updated At",
+    "market.detail.tags":  "Tags",
+    "market.detail.project":  "Project",
+    "market.detail.state":  "Install State",
+    "market.detail.market_source":  "Market Source",
+    "market.detail.homepage":  "Homepage",
+    "market.detail.repository":  "Repository",
+    "market.detail.release_notes":  "Release Notes",
+    "market.detail.state.not_installed":  "Not installed",
+    "market.detail.state.update_available":  "Update available",
+    "market.detail.state.installed":  "Installed",
+    "market.detail.unknown":  "Unknown",
+    "market.button.install":  "Install",
+    "market.button.update":  "Update",
+    "market.button.installed":  "Installed",
+    "market.button.installing":  "Installing...",
     "button.component_library":  "Edit Desktop",
     "tooltip.component_library":  "Edit Desktop",
     "component_library.title":  "Widgets",
@@ -617,3 +744,5 @@
     "placement.center":  "Center",
     "placement.tile":  "Tile"
 }
+
+

LanMountainDesktop/Localization/zh-CN.json

@@ -1,11 +1,22 @@
 {
     "app.title":  "LanMountainDesktop",
+    "tray.tooltip":  "LanMountainDesktop",
+    "tray.menu.settings":  "设置",
+    "tray.menu.restart":  "重启应用",
+    "tray.menu.exit":  "退出应用",
     "button.back_to_windows":  "回到Windows",
     "tooltip.back_to_windows":  "回到Windows",
     "tooltip.open_settings":  "设置",
     "settings.title":  "设置",
+    "settings.shell.title":  "应用设置",
+    "settings.shell.subtitle":  "LanMountainDesktop 独立设置窗口",
+    "settings.shell.sidebar_hint":  "选择一个分类以调整应用行为、桌面布局与外观。",
+    "settings.shell.footer_hint":  "托盘菜单打开的设置会统一在这个独立窗口中管理。",
     "settings.back_to_desktop":  "返回桌面",
     "settings.nav_header":  "设置选项",
+    "settings.nav.group_desktop":  "桌面",
+    "settings.nav.group_system":  "系统",
+    "settings.nav.group_extensions":  "扩展",
     "settings.nav.wallpaper":  "壁纸",
     "settings.nav.grid":  "网格",
     "settings.nav.color":  "颜色",
@@ -109,6 +120,8 @@
     "settings.weather.preview_header":  "连接测试",
     "settings.weather.preview_desc":  "发送一次测试请求，验证当前配置是否可用。",
     "settings.weather.preview_button":  "测试获取",
+    "settings.weather.preview_section":  "天气预览",
+    "settings.weather.settings_section":  "设置",
     "settings.weather.preview_panel_header":  "天气预览",
     "settings.weather.preview_panel_desc":  "刷新并验证当前天气服务状态。",
     "settings.weather.refresh_button":  "刷新",
@@ -129,6 +142,15 @@
     "settings.weather.status_city_empty":  "尚未配置城市位置。",
     "settings.weather.status_city_format":  "模式：{0}｜{1}｜Key：{2}",
     "settings.weather.status_coordinates_format":  "模式：{0}｜纬度 {1:F4}，经度 {2:F4}｜Key：{3}",
+    "settings.weather.city_selection_label":  "城市选择",
+    "settings.weather.coordinates_selection_label":  "坐标定位",
+    "settings.weather.location_city_summary_desc":  "选择当前所在的城市，用于天气查询。",
+    "settings.weather.location_coordinates_summary_desc":  "设置经纬度与可选的位置名称，用于天气查询。",
+    "settings.weather.location_not_selected":  "未选择位置",
+    "settings.weather.alert_list_label":  "排除列表",
+    "settings.weather.alert_list_desc":  "一行一条排除项。",
+    "settings.weather.no_tls_toggle":  "允许在兼容性较差的网络环境下回退到非 TLS 请求",
+    "settings.weather.footer_hint":  "桌面上的天气组件会共享这里配置的天气位置与预警排除规则。",
     "settings.weather.location_header":  "天气位置",
     "settings.weather.location_desc":  "设置天气组件使用的位置。",
     "settings.weather.location_placeholder":  "例如：北京",
@@ -237,6 +259,25 @@
     "settings.about.startup_header":  "Windows 自启动",
     "settings.about.startup_desc":  "在登录 Windows 时自动启动应用。",
     "settings.about.startup_toggle":  "登录 Windows 时启动",
+    "settings.about.render_mode_header":  "应用渲染模式",
+    "settings.about.render_mode_desc":  "选择应用渲染后端。更改后需要重启应用生效。不支持的模式会回退到软件渲染。",
+    "settings.about.render_mode.default":  "默认",
+    "settings.about.render_mode.software":  "软件",
+    "settings.about.render_mode.angle_egl":  "angleEgl",
+    "settings.about.render_mode.wgl":  "WGL",
+    "settings.about.render_mode.vulkan":  "Vulkan",
+    "settings.about.render_mode.unknown":  "未知",
+    "settings.about.render_mode.current_label":  "当前实际渲染后端",
+    "settings.about.render_mode.current_format":  "当前后端：{0}",
+    "settings.about.render_mode.impl_format":  "运行时实现：{0}",
+    "settings.about.render_mode.impl_unavailable":  "当前无法获取运行时实现信息。",
+    "settings.restart_dialog.title":  "需要重启应用",
+    "settings.restart_dialog.render_mode_message":  "需要重启应用，才能将渲染模式从“{0}”切换到“{1}”。是否现在重启？",
+    "settings.restart_dialog.restart":  "立即重启",
+    "settings.restart_dialog.cancel":  "取消",
+    "settings.restart_dock.title":  "需要重启应用",
+    "settings.restart_dock.description":  "部分更改需要在重启应用后才会生效。",
+    "settings.restart_dock.button":  "重启应用",
     "settings.footer":  "LanMountainDesktop 设置",
     "filepicker.title":  "选择壁纸",
     "filepicker.image_files":  "图片文件",
@@ -265,12 +306,98 @@
     "settings.launcher.hidden_empty":  "暂无隐藏项目。",
     "settings.launcher.hidden_type_folder":  "文件夹",
     "settings.launcher.hidden_type_shortcut":  "快捷方式",
-    "settings.launcher.restore_button":  "重新显示",
+    "settings.launcher.restore_button":  "取消隐藏",
     "settings.plugins.title":  "插件",
     "settings.plugins.runtime_header":  "插件运行时",
-    "settings.plugins.runtime_desc":  "管理插件加载与后端隔离运行。",
-    "settings.plugins.runtime_hint":  "这里将承载已安装插件、权限审查和沙盒后端运行时控制。",
-    "settings.plugins.runtime_status":  "插件管理界面尚未接入实际数据。下一步是把加载器、权限和 worker 隔离状态接到这里。",
+    "settings.plugins.runtime_desc":  "查看插件运行时状态、加载结果与诊断信息。",
+    "settings.plugins.runtime_hint":  "这里展示已安装插件的发现结果、加载状态和运行时诊断信息。",
+    "settings.plugins.runtime_status":  "插件扫描完成后，运行时状态会显示在这里。",
+    "settings.plugins.installed_header":  "已安装插件",
+    "settings.plugins.installed_desc":  "在这里查看和删除已安装的插件。",
+    "settings.plugins.import_header":  "从安装包导入",
+    "settings.plugins.import_desc":  "打开一个 .laapp 插件包，并将其暂存到本地插件目录。",
+    "settings.plugins.restart_hint":  "插件安装和删除变更会在重启应用后生效。",
+    "settings.plugins.empty":  "未找到插件。",
+    "settings.plugins.runtime_unavailable":  "插件运行时不可用。",
+    "settings.plugins.summary_format":  "共检测到 {0} 个插件；已启用 {1} 个；已加载 {2} 个；设置页 {3} 个；组件 {4} 个；失败 {5} 个。",
+    "settings.plugins.summary_item_format":  "{0}  v{1}  |  {2}",
+    "settings.plugins.state.enabled":  "已启用",
+    "settings.plugins.state.enabled_failed":  "已启用 / 加载失败",
+    "settings.plugins.state.disabled":  "已禁用",
+    "settings.plugins.state.loaded":  "已加载",
+    "settings.plugins.state.load_failed":  "加载失败",
+    "settings.plugins.toggle_on":  "启用",
+    "settings.plugins.toggle_off":  "禁用",
+    "settings.plugins.toggle_result_format":  "插件“{0}”已在下次启动时设为{1}。重启应用后，设置页和组件变更才会生效。",
+    "settings.plugins.toggle_state_enabled":  "启用",
+    "settings.plugins.toggle_state_disabled":  "禁用",
+    "settings.plugins.toggle_failed_detail_format":  "更新插件“{0}”状态失败：{1}",
+    "settings.plugins.install_button":  "打开 .laapp 插件包",
+    "settings.plugins.install_unavailable":  "插件运行时不可用，暂时无法安装 .laapp 插件包。",
+    "settings.plugins.install_hint_format":  "打开一个 .laapp 插件包，安装到：{0}",
+    "settings.plugins.install_picker_title":  "选择插件安装包",
+    "settings.plugins.install_file_type":  ".laapp 插件包",
+    "settings.plugins.install_picker_unavailable":  "文件存储提供程序不可用。",
+    "settings.plugins.install_copy_failed":  "复制所选 .laapp 插件包失败。",
+    "settings.plugins.install_success_format":  "插件“{0}”安装完成。重启应用后，新增的设置页和组件才会生效。",
+    "settings.plugins.install_failed_format":  "安装插件包失败：{0}",
+    "settings.plugins.delete_button":  "删除插件",
+    "settings.plugins.delete_success_format":  "插件“{0}”已暂存删除。重启应用后会完成移除。",
+    "settings.plugins.delete_failed_format":  "删除插件失败：{0}",
+    "settings.plugins.delete_failed_detail_format":  "删除插件“{0}”失败：{1}",
+    "settings.plugins.publisher_format":  "发布者：{0}",
+    "settings.plugins.publisher_unknown":  "未知发布者",
+    "settings.plugins.source_package":  ".laapp 包",
+    "settings.plugins.source_manifest":  "散装清单",
+    "settings.plugins.subtitle_format":  "{0} | {1} | {2}",
+    "settings.plugins.detail_format":  "设置页：{0} | 组件：{1}",
+    "settings.nav.plugin_market":  "插件市场",
+    "settings.plugin_market.title":  "插件市场",
+    "settings.plugin_market.subtitle":  "浏览来自 LanAirApp 官方源的插件，并将安装暂存到本地。",
+    "settings.plugin_market.unavailable":  "插件运行时不可用，暂时无法打开官方市场。",
+    "market.toolbar.search_placeholder":  "搜索插件",
+    "market.toolbar.refresh":  "刷新",
+    "market.status.loading":  "正在加载官方插件市场...",
+    "market.status.loaded_network_format":  "已从官方源加载 {0} 个插件。",
+    "market.status.loaded_cache_format":  "官方源暂时不可用，已从缓存加载 {0} 个插件。原因：{1}",
+    "market.status.load_failed_format":  "加载插件市场失败：{0}",
+    "market.status.installing_format":  "正在下载并暂存插件“{0}”...",
+    "market.status.install_success_format":  "插件“{0}”已暂存完成。重启应用后生效。",
+    "market.status.install_failed_format":  "安装插件失败：{0}",
+    "market.status.host_incompatible_format":  "当前宿主版本过低，至少需要 {0}。",
+    "market.list.empty":  "插件市场尚未加载。",
+    "market.list.no_results":  "没有匹配当前搜索的插件。",
+    "market.card.subtitle_format":  "{0} | v{1}",
+    "market.card.loaded":  "已加载",
+    "market.card.pending_restart":  "需要重启",
+    "market.detail.placeholder":  "从左侧选择一个插件以查看详情。",
+    "market.detail.author":  "作者",
+    "market.detail.version":  "版本",
+    "market.detail.api_version":  "API 版本",
+    "market.detail.min_host_version":  "最低宿主版本",
+    "market.detail.installed_version":  "已安装版本",
+    "market.detail.not_installed":  "未安装",
+    "market.detail.readme":  "README",
+    "market.detail.plugin_information":  "插件信息",
+    "market.detail.author_subtitle_format":  "作者：{0}",
+    "market.detail.package_size":  "包大小",
+    "market.detail.published_at":  "首次发布",
+    "market.detail.updated_at":  "最近更新",
+    "market.detail.tags":  "标签",
+    "market.detail.project":  "项目",
+    "market.detail.state":  "安装状态",
+    "market.detail.market_source":  "市场源",
+    "market.detail.homepage":  "主页",
+    "market.detail.repository":  "仓库",
+    "market.detail.release_notes":  "发布说明",
+    "market.detail.state.not_installed":  "未安装",
+    "market.detail.state.update_available":  "可更新",
+    "market.detail.state.installed":  "已安装",
+    "market.detail.unknown":  "未知",
+    "market.button.install":  "安装",
+    "market.button.update":  "更新",
+    "market.button.installed":  "已安装",
+    "market.button.installing":  "安装中...",
     "button.component_library":  "桌面编辑",
     "tooltip.component_library":  "桌面编辑",
     "component_library.title":  "桌面编辑",
@@ -617,3 +744,5 @@
     "placement.center":  "居中",
     "placement.tile":  "平铺"
 }
+
+

LanMountainDesktop/Models/AppSettingsSnapshot.cs

@@ -20,6 +20,8 @@ public sealed class AppSettingsSnapshot
 
     public int SettingsTabIndex { get; set; } = 0;
 
+    public string? SettingsTabTag { get; set; }
+
     public string LanguageCode { get; set; } = "zh-CN";
 
     public string? TimeZoneId { get; set; }
@@ -46,6 +48,8 @@ public sealed class AppSettingsSnapshot
 
     public bool AutoStartWithWindows { get; set; }
 
+    public string AppRenderMode { get; set; } = "Default";
+
     public bool AutoCheckUpdates { get; set; } = true;
 
     public bool IncludePrereleaseUpdates { get; set; }
@@ -70,15 +74,7 @@ public sealed class AppSettingsSnapshot
 
     public int StatusBarCustomSpacingPercent { get; set; } = 12;
 
-    public int DesktopPageCount { get; set; } = 1;
-
-    public int CurrentDesktopSurfaceIndex { get; set; } = 0;
-
-    public List<DesktopComponentPlacementSnapshot> DesktopComponentPlacements { get; set; } = [];
-
-    public List<string> HiddenLauncherFolderPaths { get; set; } = [];
-
-    public List<string> HiddenLauncherAppPaths { get; set; } = [];
+    public List<string> DisabledPluginIds { get; set; } = [];
 
     public AppSettingsSnapshot Clone()
     {
@@ -90,35 +86,8 @@ public sealed class AppSettingsSnapshot
         clone.PinnedTaskbarActions = PinnedTaskbarActions is { Count: > 0 }
             ? new List<string>(PinnedTaskbarActions)
             : [];
-
-        var placements = new List<DesktopComponentPlacementSnapshot>(DesktopComponentPlacements?.Count ?? 0);
-        if (DesktopComponentPlacements is not null)
-        {
-            foreach (var placement in DesktopComponentPlacements)
-            {
-                if (placement is null)
-                {
-                    continue;
-                }
-
-                placements.Add(new DesktopComponentPlacementSnapshot
-                {
-                    PlacementId = placement.PlacementId,
-                    PageIndex = placement.PageIndex,
-                    ComponentId = placement.ComponentId,
-                    Row = placement.Row,
-                    Column = placement.Column,
-                    WidthCells = placement.WidthCells,
-                    HeightCells = placement.HeightCells
-                });
-            }
-        }
-        clone.DesktopComponentPlacements = placements;
-        clone.HiddenLauncherFolderPaths = HiddenLauncherFolderPaths is { Count: > 0 }
-            ? new List<string>(HiddenLauncherFolderPaths)
-            : [];
-        clone.HiddenLauncherAppPaths = HiddenLauncherAppPaths is { Count: > 0 }
-            ? new List<string>(HiddenLauncherAppPaths)
+        clone.DisabledPluginIds = DisabledPluginIds is { Count: > 0 }
+            ? new List<string>(DisabledPluginIds)
             : [];
 
         return clone;

LanMountainDesktop/Models/DesktopLayoutSettingsSnapshot.cs

@@ -0,0 +1,43 @@
+using System.Collections.Generic;
+
+namespace LanMountainDesktop.Models;
+
+public sealed class DesktopLayoutSettingsSnapshot
+{
+    public int DesktopPageCount { get; set; } = 1;
+
+    public int CurrentDesktopSurfaceIndex { get; set; }
+
+    public List<DesktopComponentPlacementSnapshot> DesktopComponentPlacements { get; set; } = [];
+
+    public DesktopLayoutSettingsSnapshot Clone()
+    {
+        var clone = (DesktopLayoutSettingsSnapshot)MemberwiseClone();
+        var placements = new List<DesktopComponentPlacementSnapshot>(DesktopComponentPlacements?.Count ?? 0);
+
+        if (DesktopComponentPlacements is not null)
+        {
+            foreach (var placement in DesktopComponentPlacements)
+            {
+                if (placement is null)
+                {
+                    continue;
+                }
+
+                placements.Add(new DesktopComponentPlacementSnapshot
+                {
+                    PlacementId = placement.PlacementId,
+                    PageIndex = placement.PageIndex,
+                    ComponentId = placement.ComponentId,
+                    Row = placement.Row,
+                    Column = placement.Column,
+                    WidthCells = placement.WidthCells,
+                    HeightCells = placement.HeightCells
+                });
+            }
+        }
+
+        clone.DesktopComponentPlacements = placements;
+        return clone;
+    }
+}

LanMountainDesktop/Models/LauncherSettingsSnapshot.cs

@@ -0,0 +1,22 @@
+using System.Collections.Generic;
+
+namespace LanMountainDesktop.Models;
+
+public sealed class LauncherSettingsSnapshot
+{
+    public List<string> HiddenLauncherFolderPaths { get; set; } = [];
+
+    public List<string> HiddenLauncherAppPaths { get; set; } = [];
+
+    public LauncherSettingsSnapshot Clone()
+    {
+        var clone = (LauncherSettingsSnapshot)MemberwiseClone();
+        clone.HiddenLauncherFolderPaths = HiddenLauncherFolderPaths is { Count: > 0 }
+            ? new List<string>(HiddenLauncherFolderPaths)
+            : [];
+        clone.HiddenLauncherAppPaths = HiddenLauncherAppPaths is { Count: > 0 }
+            ? new List<string>(HiddenLauncherAppPaths)
+            : [];
+        return clone;
+    }
+}

LanMountainDesktop/PACKAGING.md

@@ -1,75 +1,51 @@
-# Desktop Packaging Guide
+# 桌面端打包指南
 
-## Prerequisites
-- Install `.NET SDK 10`
-- Windows installer build only:
-  - Install `Inno Setup 6` (`ISCC.exe`)
+## 中文
 
-## Local packaging commands
+本指南说明阑山桌面的本地打包和 CI 打包流程。
+
+### 前置条件
+
+- 安装 .NET SDK 10
+- Windows 安装包需要 Inno Setup 6（`ISCC.exe`）
+
+### 本地打包命令
+
+#### Windows 安装包
 
-### Windows installer (`win-x64`)
 ```powershell
 .\scripts\package.ps1 -RuntimeIdentifier win-x64 -Version 1.0.1
 ```
 
-Output:
-- Published files: `artifacts/publish/win-x64`
-- Installer: `artifacts/installer`
+#### Linux 包
 
-### Linux package (`linux-x64`)
 ```powershell
 pwsh ./scripts/package.ps1 -RuntimeIdentifier linux-x64 -Version 1.0.1
 ```
 
-Output:
-- Published files: `artifacts/publish/linux-x64`
-- Zip package: `artifacts/packages/LanMountainDesktop-1.0.1-linux-x64.zip`
+#### macOS 包
 
-### macOS package (`osx-x64`)
 ```powershell
 pwsh ./scripts/package.ps1 -RuntimeIdentifier osx-x64 -Version 1.0.1
 ```
 
-Output:
-- Published files: `artifacts/publish/osx-x64`
-- Zip package: `artifacts/packages/LanMountainDesktop-1.0.1-osx-x64.zip`
+### 产物位置
 
-## Optional script flags
-```powershell
-# Publish only (skip Windows installer step)
-.\scripts\package.ps1 -RuntimeIdentifier win-x64 -SkipInstaller
+- 发布目录：`artifacts/publish/<rid>`
+- 安装包或压缩包：`artifacts/installer` 或 `artifacts/packages`
 
-# Publish only (skip Linux/macOS zip package step)
-pwsh ./scripts/package.ps1 -RuntimeIdentifier linux-x64 -SkipArchive
-```
+### CI 流程
 
-## Runtime dependency notes
-- Linux build does not bundle a native `libvlc` package from NuGet.
-  - Install VLC runtime on target machine, for example:
-    - Ubuntu/Debian: `sudo apt install vlc libvlc-dev`
-- macOS packaging target in CI is currently `osx-x64`.
+- 工作流文件：`.github/workflows/windows-ci.yml`
+- 日常构建会验证桌面端可编译
+- 手动触发或 `v*` 标签可生成正式包并上传到 Release
 
-## CI workflow
-- Workflow file: `.github/workflows/windows-ci.yml`
-- Workflow name: `Desktop CI`
+## English
 
-Jobs:
-- `Validate Build (Windows)` runs on every push and pull request.
-- Package flow runs on manual trigger or `v*` tag push:
-  - `Resolve Package Version` (single shared version source)
-  - `Package (Windows)` (`win-x64` installer)
-  - `Package (Linux)` (`linux-x64` zip)
-  - `Package (macOS)` (`osx-x64` zip)
-- On `v*` tags, `Attach Artifacts to GitHub Release` uploads Windows/Linux/macOS packages to the release.
+This guide covers local packaging and CI packaging for LanMountainDesktop.
 
-### Trigger manual packaging
-1. Open GitHub Actions.
-2. Choose `Desktop CI`.
-3. Click `Run workflow`.
-4. Optional: set `version` input, for example `1.0.1`.
+### Key points
 
-### Trigger by tag
-```powershell
-git tag v1.0.1
-git push origin v1.0.1
-```
+- use `scripts/package.ps1` with the target runtime identifier
+- Windows installer requires Inno Setup
+- CI can publish artifacts and attach them to GitHub Releases

LanMountainDesktop/Program.cs

@@ -1,6 +1,8 @@
-using Avalonia;
+using Avalonia;
 using Avalonia.WebView.Desktop;
+using LanMountainDesktop.Services;
 using System;
+using System.Threading.Tasks;
 
 namespace LanMountainDesktop;
 
@@ -10,14 +12,78 @@ sealed class Program
     // SynchronizationContext-reliant code before AppMain is called: things aren't initialized
     // yet and stuff might break.
     [STAThread]
-    public static void Main(string[] args) => BuildAvaloniaApp()
-        .StartWithClassicDesktopLifetime(args);
+    public static void Main(string[] args)
+    {
+        AppLogger.Initialize();
+        RegisterGlobalExceptionLogging();
+
+        var diagnostics = StartupDiagnosticsService.Run(args);
+        StartupDiagnosticsService.ShowLegacyExecutableWarningIfNeeded(diagnostics);
+
+        try
+        {
+            var renderMode = LoadConfiguredRenderMode();
+            AppLogger.Info("Startup", $"Resolved render mode '{renderMode}'.");
+            BuildAvaloniaApp(renderMode).StartWithClassicDesktopLifetime(args);
+            AppLogger.Info("Startup", "Application exited normally.");
+        }
+        catch (Exception ex)
+        {
+            AppLogger.Critical("Startup", "Application terminated during startup.", ex);
+            throw;
+        }
+    }
 
     // Avalonia configuration, don't remove; also used by visual designer.
-    public static AppBuilder BuildAvaloniaApp()
-        => AppBuilder.Configure<App>()
+    public static AppBuilder BuildAvaloniaApp(string renderMode = AppRenderingModeHelper.Default)
+    {
+        var builder = AppBuilder.Configure<App>()
             .UsePlatformDetect()
             .UseDesktopWebView()
             .WithInterFont()
             .LogToTrace();
+
+        if (OperatingSystem.IsWindows())
+        {
+            var configuredModes = AppRenderingModeHelper.GetWin32RenderingModes(renderMode);
+            if (configuredModes is { Length: > 0 })
+            {
+                builder = builder.With(new Win32PlatformOptions
+                {
+                    RenderingMode = configuredModes
+                });
+            }
+        }
+
+        return builder;
+    }
+
+    private static string LoadConfiguredRenderMode()
+    {
+        try
+        {
+            return AppRenderingModeHelper.Normalize(new AppSettingsService().Load().AppRenderMode);
+        }
+        catch (Exception ex)
+        {
+            AppLogger.Warn("Startup", "Failed to load configured render mode. Falling back to default.", ex);
+            return AppRenderingModeHelper.Default;
+        }
+    }
+
+    private static void RegisterGlobalExceptionLogging()
+    {
+        AppDomain.CurrentDomain.UnhandledException += (_, eventArgs) =>
+        {
+            AppLogger.Critical(
+                "UnhandledException",
+                $"Unhandled exception. IsTerminating={eventArgs.IsTerminating}",
+                eventArgs.ExceptionObject as Exception);
+        };
+
+        TaskScheduler.UnobservedTaskException += (_, eventArgs) =>
+        {
+            AppLogger.Error("TaskScheduler", "Unobserved task exception.", eventArgs.Exception);
+        };
+    }
 }

LanMountainDesktop/Services/AppLogger.cs

@@ -0,0 +1,169 @@
+using System;
+using System.Diagnostics;
+using System.IO;
+using System.Text;
+
+namespace LanMountainDesktop.Services;
+
+public static class AppLogger
+{
+    private static readonly object SyncRoot = new();
+    private static bool _initialized;
+    private static string _logDirectory = string.Empty;
+    private static string _logFilePath = string.Empty;
+
+    public static string LogDirectory
+    {
+        get
+        {
+            EnsureInitialized();
+            return _logDirectory;
+        }
+    }
+
+    public static string LogFilePath
+    {
+        get
+        {
+            EnsureInitialized();
+            return _logFilePath;
+        }
+    }
+
+    public static void Initialize()
+    {
+        lock (SyncRoot)
+        {
+            if (_initialized)
+            {
+                return;
+            }
+
+            var preferredDirectory = Path.Combine(AppContext.BaseDirectory, "log");
+            var fallbackDirectory = Path.Combine(
+                Environment.GetFolderPath(Environment.SpecialFolder.LocalApplicationData),
+                "LanMountainDesktop",
+                "log");
+
+            var preferredReady = TryPrepareDirectory(preferredDirectory, out var preferredError);
+            var fallbackReady = false;
+            string? fallbackError = null;
+
+            if (preferredReady)
+            {
+                _logDirectory = preferredDirectory;
+            }
+            else
+            {
+                fallbackReady = TryPrepareDirectory(fallbackDirectory, out fallbackError);
+                _logDirectory = fallbackReady ? fallbackDirectory : preferredDirectory;
+            }
+
+            _logFilePath = Path.Combine(_logDirectory, $"app-{DateTime.Now:yyyyMMdd}.log");
+            _initialized = true;
+
+            WriteCore(
+                "INFO",
+                "Logger",
+                $"Initialized. Directory={_logDirectory}; File={_logFilePath}; PreferredDirectory={preferredDirectory}");
+
+            if (!preferredReady && !string.IsNullOrWhiteSpace(preferredError))
+            {
+                WriteCore(
+                    "WARN",
+                    "Logger",
+                    $"Failed to use program log directory '{preferredDirectory}'. Falling back to '{_logDirectory}'. Reason: {preferredError}");
+            }
+
+            if (!preferredReady && !fallbackReady && !string.IsNullOrWhiteSpace(fallbackError))
+            {
+                Trace.WriteLine(
+                    $"[LanMountainDesktop][Logger][ERROR] Failed to initialize fallback log directory '{fallbackDirectory}': {fallbackError}");
+            }
+        }
+    }
+
+    public static void Info(string category, string message)
+    {
+        Write("INFO", category, message, null);
+    }
+
+    public static void Warn(string category, string message, Exception? exception = null)
+    {
+        Write("WARN", category, message, exception);
+    }
+
+    public static void Error(string category, string message, Exception? exception = null)
+    {
+        Write("ERROR", category, message, exception);
+    }
+
+    public static void Critical(string category, string message, Exception? exception = null)
+    {
+        Write("CRITICAL", category, message, exception);
+    }
+
+    private static void Write(string level, string category, string message, Exception? exception)
+    {
+        EnsureInitialized();
+
+        var payload = exception is null
+            ? message
+            : $"{message}{Environment.NewLine}{exception}";
+        WriteCore(level, category, payload);
+    }
+
+    private static void EnsureInitialized()
+    {
+        if (_initialized)
+        {
+            return;
+        }
+
+        Initialize();
+    }
+
+    private static void WriteCore(string level, string category, string message)
+    {
+        var timestamp = DateTime.Now.ToString("yyyy-MM-dd HH:mm:ss.fff");
+        var line = $"[{timestamp}] [{level}] [{category}] {message}";
+
+        lock (SyncRoot)
+        {
+            try
+            {
+                var directory = Path.GetDirectoryName(_logFilePath);
+                if (!string.IsNullOrWhiteSpace(directory))
+                {
+                    Directory.CreateDirectory(directory);
+                }
+
+                File.AppendAllText(_logFilePath, line + Environment.NewLine, Encoding.UTF8);
+            }
+            catch (Exception ex)
+            {
+                Trace.WriteLine($"[LanMountainDesktop][Logger][ERROR] {ex}");
+            }
+        }
+
+        Trace.WriteLine(line);
+    }
+
+    private static bool TryPrepareDirectory(string directory, out string? error)
+    {
+        try
+        {
+            Directory.CreateDirectory(directory);
+            var probePath = Path.Combine(directory, $".probe-{Guid.NewGuid():N}.tmp");
+            File.WriteAllText(probePath, "probe");
+            File.Delete(probePath);
+            error = null;
+            return true;
+        }
+        catch (Exception ex)
+        {
+            error = ex.Message;
+            return false;
+        }
+    }
+}

LanMountainDesktop/Services/AppRenderBackendDiagnostics.cs

@@ -0,0 +1,73 @@
+using System;
+using System.Reflection;
+using Avalonia;
+using Avalonia.Platform;
+
+namespace LanMountainDesktop.Services;
+
+public readonly record struct AppRenderBackendInfo(
+    string ActualBackend,
+    string? ImplementationTypeName);
+
+public static class AppRenderBackendDiagnostics
+{
+    public const string Unknown = "Unknown";
+
+    public static AppRenderBackendInfo Detect()
+    {
+        var platformGraphics = GetPlatformGraphics();
+        var implementationTypeName = platformGraphics?.GetType().FullName;
+        var actualBackend = DetectBackendFromImplementationType(implementationTypeName, platformGraphics is null);
+
+        return new AppRenderBackendInfo(actualBackend, implementationTypeName);
+    }
+
+    private static object? GetPlatformGraphics()
+    {
+        var currentResolver = typeof(AvaloniaLocator)
+            .GetProperty("Current", BindingFlags.Public | BindingFlags.Static)
+            ?.GetValue(null);
+
+        var getServiceMethod = currentResolver?
+            .GetType()
+            .GetMethod(
+                "GetService",
+                BindingFlags.Public | BindingFlags.Instance,
+                binder: null,
+                types: [typeof(Type)],
+                modifiers: null);
+
+        return getServiceMethod?.Invoke(currentResolver, [typeof(IPlatformGraphics)]);
+    }
+
+    private static string DetectBackendFromImplementationType(string? implementationTypeName, bool isSoftwareFallback)
+    {
+        if (isSoftwareFallback)
+        {
+            return AppRenderingModeHelper.Software;
+        }
+
+        if (string.IsNullOrWhiteSpace(implementationTypeName))
+        {
+            return Unknown;
+        }
+
+        if (implementationTypeName.Contains("Vulkan", StringComparison.OrdinalIgnoreCase))
+        {
+            return AppRenderingModeHelper.Vulkan;
+        }
+
+        if (implementationTypeName.Contains("Wgl", StringComparison.OrdinalIgnoreCase))
+        {
+            return AppRenderingModeHelper.Wgl;
+        }
+
+        if (implementationTypeName.Contains("Angle", StringComparison.OrdinalIgnoreCase) ||
+            implementationTypeName.Contains("Egl", StringComparison.OrdinalIgnoreCase))
+        {
+            return AppRenderingModeHelper.AngleEgl;
+        }
+
+        return Unknown;
+    }
+}

LanMountainDesktop/Services/AppRenderingModeHelper.cs

@@ -0,0 +1,42 @@
+using Avalonia;
+
+namespace LanMountainDesktop.Services;
+
+public static class AppRenderingModeHelper
+{
+    public const string Default = "Default";
+    public const string Software = "Software";
+    public const string AngleEgl = "AngleEgl";
+    public const string Wgl = "Wgl";
+    public const string Vulkan = "Vulkan";
+
+    public static string Normalize(string? value)
+    {
+        if (string.IsNullOrWhiteSpace(value))
+        {
+            return Default;
+        }
+
+        return value.Trim().ToUpperInvariant() switch
+        {
+            "SOFTWARE" => Software,
+            "ANGLEEGL" => AngleEgl,
+            "ANGLE_EGL" => AngleEgl,
+            "WGL" => Wgl,
+            "VULKAN" => Vulkan,
+            _ => Default
+        };
+    }
+
+    public static Win32RenderingMode[]? GetWin32RenderingModes(string? value)
+    {
+        return Normalize(value) switch
+        {
+            Software => [Win32RenderingMode.Software],
+            AngleEgl => [Win32RenderingMode.AngleEgl, Win32RenderingMode.Software],
+            Wgl => [Win32RenderingMode.Wgl, Win32RenderingMode.Software],
+            Vulkan => [Win32RenderingMode.Vulkan, Win32RenderingMode.Software],
+            _ => null
+        };
+    }
+}

LanMountainDesktop/Services/AppRestartService.cs

@@ -0,0 +1,171 @@
+using System;
+using System.Collections.Generic;
+using System.Diagnostics;
+using System.IO;
+using System.Reflection;
+using Avalonia;
+using Avalonia.Controls.ApplicationLifetimes;
+
+namespace LanMountainDesktop.Services;
+
+public static class AppRestartService
+{
+    public static bool TryRestartApplication()
+    {
+        if (!TryRestartCurrentProcess())
+        {
+            return false;
+        }
+
+        if (Application.Current?.ApplicationLifetime is IClassicDesktopStyleApplicationLifetime desktop)
+        {
+            desktop.Shutdown();
+        }
+
+        return true;
+    }
+
+    public static bool TryRestartCurrentProcess()
+    {
+        try
+        {
+            var startInfo = CreateRestartStartInfo();
+            if (startInfo is null)
+            {
+                Debug.WriteLine("[AppRestart] Failed to resolve restart start info.");
+                return false;
+            }
+
+            Process.Start(startInfo);
+            return true;
+        }
+        catch (Exception ex)
+        {
+            Debug.WriteLine($"[AppRestart] Failed to restart app: {ex}");
+            return false;
+        }
+    }
+
+    public static ProcessStartInfo? CreateRestartStartInfo(
+        string[]? commandLineArgs = null,
+        string? processPath = null,
+        string? entryAssemblyLocation = null)
+    {
+        var args = commandLineArgs ?? Environment.GetCommandLineArgs();
+        var resolvedProcessPath = NormalizeExistingPath(processPath ?? Environment.ProcessPath);
+        var resolvedEntryAssemblyPath = NormalizeExistingPath(
+            entryAssemblyLocation ?? Assembly.GetEntryAssembly()?.Location);
+
+        if (IsDotnetHost(resolvedProcessPath))
+        {
+            return CreateDotnetStartInfo(
+                resolvedProcessPath!,
+                resolvedEntryAssemblyPath,
+                args);
+        }
+
+        if (!string.IsNullOrWhiteSpace(resolvedProcessPath))
+        {
+            return CreateExecutableStartInfo(
+                resolvedProcessPath,
+                resolvedEntryAssemblyPath,
+                args);
+        }
+
+        if (!string.IsNullOrWhiteSpace(resolvedEntryAssemblyPath) &&
+            string.Equals(Path.GetExtension(resolvedEntryAssemblyPath), ".dll", StringComparison.OrdinalIgnoreCase))
+        {
+            return CreateDotnetStartInfo(
+                "dotnet",
+                resolvedEntryAssemblyPath,
+                args);
+        }
+
+        return null;
+    }
+
+    private static ProcessStartInfo CreateExecutableStartInfo(
+        string executablePath,
+        string? entryAssemblyPath,
+        IReadOnlyList<string> commandLineArgs)
+    {
+        var startInfo = new ProcessStartInfo
+        {
+            FileName = executablePath,
+            UseShellExecute = false,
+            WorkingDirectory = ResolveWorkingDirectory(executablePath, entryAssemblyPath)
+        };
+
+        AppendArguments(startInfo, commandLineArgs);
+        return startInfo;
+    }
+
+    private static ProcessStartInfo? CreateDotnetStartInfo(
+        string dotnetHostPath,
+        string? entryAssemblyPath,
+        IReadOnlyList<string> commandLineArgs)
+    {
+        if (string.IsNullOrWhiteSpace(entryAssemblyPath))
+        {
+            return null;
+        }
+
+        var startInfo = new ProcessStartInfo
+        {
+            FileName = dotnetHostPath,
+            UseShellExecute = false,
+            WorkingDirectory = ResolveWorkingDirectory(dotnetHostPath, entryAssemblyPath)
+        };
+
+        startInfo.ArgumentList.Add(entryAssemblyPath);
+        AppendArguments(startInfo, commandLineArgs);
+        return startInfo;
+    }
+
+    private static void AppendArguments(ProcessStartInfo startInfo, IReadOnlyList<string> commandLineArgs)
+    {
+        for (var i = 1; i < commandLineArgs.Count; i++)
+        {
+            startInfo.ArgumentList.Add(commandLineArgs[i]);
+        }
+    }
+
+    private static string? NormalizeExistingPath(string? path)
+    {
+        if (string.IsNullOrWhiteSpace(path))
+        {
+            return null;
+        }
+
+        try
+        {
+            var fullPath = Path.GetFullPath(path);
+            return File.Exists(fullPath) ? fullPath : null;
+        }
+        catch
+        {
+            return null;
+        }
+    }
+
+    private static bool IsDotnetHost(string? processPath)
+    {
+        if (string.IsNullOrWhiteSpace(processPath))
+        {
+            return false;
+        }
+
+        var fileName = Path.GetFileName(processPath);
+        return string.Equals(fileName, "dotnet", StringComparison.OrdinalIgnoreCase) ||
+               string.Equals(fileName, "dotnet.exe", StringComparison.OrdinalIgnoreCase);
+    }
+
+    private static string ResolveWorkingDirectory(string launchPath, string? entryAssemblyPath)
+    {
+        var basePath = !string.IsNullOrWhiteSpace(entryAssemblyPath)
+            ? entryAssemblyPath
+            : launchPath;
+
+        return Path.GetDirectoryName(basePath) ?? AppContext.BaseDirectory;
+    }
+}

LanMountainDesktop/Services/AppSettingsService.cs

@@ -7,6 +7,8 @@ namespace LanMountainDesktop.Services;
 
 public sealed class AppSettingsService
 {
+    public static event Action<string>? SettingsSaved;
+
     private static readonly JsonSerializerOptions SerializerOptions = new()
     {
         WriteIndented = true
@@ -21,6 +23,8 @@ public sealed class AppSettingsService
 
     private readonly string _settingsPath;
 
+    public string InstanceId { get; } = Guid.NewGuid().ToString("N");
+
     public AppSettingsService()
     {
         var appData = Environment.GetFolderPath(Environment.SpecialFolder.LocalApplicationData);
@@ -59,8 +63,9 @@ public sealed class AppSettingsService
                 return loadedSnapshot.Clone();
             }
         }
-        catch
+        catch (Exception ex)
         {
+            AppLogger.Warn("AppSettings", $"Failed to load settings from '{_settingsPath}'.", ex);
             return new AppSettingsSnapshot();
         }
     }
@@ -88,10 +93,12 @@ public sealed class AppSettingsService
             {
                 UpdateCache(snapshotToPersist, writeTimeUtc, DateTime.UtcNow);
             }
+
+            SettingsSaved?.Invoke(InstanceId);
         }
-        catch
+        catch (Exception ex)
         {
-            // Swallow persistence errors to keep UI interactions uninterrupted.
+            AppLogger.Warn("AppSettings", $"Failed to save settings to '{_settingsPath}'.", ex);
         }
     }
 
@@ -130,8 +137,9 @@ public sealed class AppSettingsService
             var json = File.ReadAllText(_settingsPath);
             return JsonSerializer.Deserialize<AppSettingsSnapshot>(json, SerializerOptions) ?? new AppSettingsSnapshot();
         }
-        catch
+        catch (Exception ex)
         {
+            AppLogger.Warn("AppSettings", $"Failed to deserialize settings from '{_settingsPath}'.", ex);
             return new AppSettingsSnapshot();
         }
     }

LanMountainDesktop/Services/ComponentSettingsService.cs

@@ -2,12 +2,13 @@ using System;
 using System.Collections.Generic;
 using System.IO;
 using System.Linq;
+using System.Reflection;
 using System.Text.Json;
 using LanMountainDesktop.Models;
 
 namespace LanMountainDesktop.Services;
 
-public sealed class ComponentSettingsService
+public sealed class ComponentSettingsService : IComponentInstanceSettingsStore
 {
     private static readonly JsonSerializerOptions SerializerOptions = new()
     {
@@ -18,12 +19,14 @@ public sealed class ComponentSettingsService
     private static readonly TimeSpan CacheProbeInterval = TimeSpan.FromMilliseconds(400);
 
     private static string? _cachedPath;
-    private static ComponentSettingsSnapshot? _cachedSnapshot;
+    private static ComponentSettingsDocumentSnapshot? _cachedSnapshot;
     private static DateTime _cachedWriteTimeUtc = DateTime.MinValue;
     private static DateTime _lastProbeUtc = DateTime.MinValue;
 
     private readonly string _settingsPath;
     private readonly string _legacyAppSettingsPath;
+    private string _scopedComponentId = string.Empty;
+    private string _scopedPlacementId = string.Empty;
 
     public ComponentSettingsService()
     {
@@ -35,79 +38,266 @@ public sealed class ComponentSettingsService
 
     public ComponentSettingsSnapshot Load()
     {
+        if (HasScopedComponentContext())
+        {
+            return LoadForComponent(_scopedComponentId, _scopedPlacementId);
+        }
+
         try
         {
             lock (CacheGate)
             {
-                var nowUtc = DateTime.UtcNow;
-                if (TryGetCachedWithoutProbe(nowUtc, out var cached))
-                {
-                    return cached;
-                }
-
-                var hasFile = File.Exists(_settingsPath);
-                var writeTimeUtc = hasFile
-                    ? File.GetLastWriteTimeUtc(_settingsPath)
-                    : DateTime.MinValue;
-
-                _lastProbeUtc = nowUtc;
-                if (TryGetCachedAfterProbe(writeTimeUtc, out cached))
-                {
-                    return cached;
-                }
-
-                ComponentSettingsSnapshot loadedSnapshot;
-                var loadedFromLegacy = false;
-                if (hasFile)
-                {
-                    loadedSnapshot = LoadSnapshotFromDisk();
-                }
-                else if (TryLoadLegacySnapshot(out var migratedSnapshot))
-                {
-                    loadedSnapshot = migratedSnapshot;
-                    loadedFromLegacy = true;
-                }
-                else
-                {
-                    loadedSnapshot = new ComponentSettingsSnapshot();
-                }
-
-                var normalizedSnapshot = NormalizeSnapshot(loadedSnapshot);
-                if (loadedFromLegacy)
-                {
-                    writeTimeUtc = PersistSnapshotToDisk(normalizedSnapshot);
-                }
-
-                UpdateCache(normalizedSnapshot, writeTimeUtc, nowUtc);
-                return normalizedSnapshot.Clone();
+                var document = LoadDocumentLocked();
+                return document.DefaultSettings.Clone();
             }
         }
-        catch
+        catch (Exception ex)
         {
+            AppLogger.Warn("ComponentSettings", $"Failed to load component settings from '{_settingsPath}'.", ex);
             return new ComponentSettingsSnapshot();
         }
     }
 
     public void Save(ComponentSettingsSnapshot snapshot)
     {
+        if (HasScopedComponentContext())
+        {
+            SaveForComponent(_scopedComponentId, _scopedPlacementId, snapshot);
+            return;
+        }
+
         var snapshotToPersist = NormalizeSnapshot(snapshot);
 
         try
         {
-            var writeTimeUtc = PersistSnapshotToDisk(snapshotToPersist);
-
             lock (CacheGate)
             {
-                UpdateCache(snapshotToPersist, writeTimeUtc, DateTime.UtcNow);
+                var document = LoadDocumentLocked();
+                document.DefaultSettings = snapshotToPersist;
+                PersistDocumentLocked(document);
             }
         }
-        catch
+        catch (Exception ex)
         {
-            // Swallow persistence errors to keep UI interactions uninterrupted.
+            AppLogger.Warn("ComponentSettings", $"Failed to save default component settings to '{_settingsPath}'.", ex);
         }
     }
 
-    private bool TryGetCachedWithoutProbe(DateTime nowUtc, out ComponentSettingsSnapshot snapshot)
+    public ComponentSettingsSnapshot LoadForComponent(string componentId, string? placementId)
+    {
+        try
+        {
+            lock (CacheGate)
+            {
+                var document = LoadDocumentLocked();
+                var instanceKey = BuildInstanceKey(componentId, placementId);
+                if (!string.IsNullOrWhiteSpace(instanceKey) &&
+                    document.InstanceSettings.TryGetValue(instanceKey, out var snapshot))
+                {
+                    return snapshot.Clone();
+                }
+
+                return document.DefaultSettings.Clone();
+            }
+        }
+        catch (Exception ex)
+        {
+            AppLogger.Warn(
+                "ComponentSettings",
+                $"Failed to load component settings. ComponentId={componentId}; PlacementId={placementId}; Path={_settingsPath}",
+                ex);
+            return new ComponentSettingsSnapshot();
+        }
+    }
+
+    public void SaveForComponent(string componentId, string? placementId, ComponentSettingsSnapshot snapshot)
+    {
+        var normalizedSnapshot = NormalizeSnapshot(snapshot);
+        var instanceKey = BuildInstanceKey(componentId, placementId);
+        if (string.IsNullOrWhiteSpace(instanceKey))
+        {
+            Save(normalizedSnapshot);
+            return;
+        }
+
+        try
+        {
+            lock (CacheGate)
+            {
+                var document = LoadDocumentLocked();
+                document.InstanceSettings[instanceKey] = normalizedSnapshot;
+                PersistDocumentLocked(document);
+            }
+        }
+        catch (Exception ex)
+        {
+            AppLogger.Warn(
+                "ComponentSettings",
+                $"Failed to save component settings. ComponentId={componentId}; PlacementId={placementId}; Path={_settingsPath}",
+                ex);
+        }
+    }
+
+    public void DeleteForComponent(string componentId, string? placementId)
+    {
+        var instanceKey = BuildInstanceKey(componentId, placementId);
+        if (string.IsNullOrWhiteSpace(instanceKey))
+        {
+            return;
+        }
+
+        try
+        {
+            lock (CacheGate)
+            {
+                var document = LoadDocumentLocked();
+                var changed = document.InstanceSettings.Remove(instanceKey);
+                changed |= document.PluginSettings.Remove(instanceKey);
+                if (changed)
+                {
+                    PersistDocumentLocked(document);
+                }
+            }
+        }
+        catch (Exception ex)
+        {
+            AppLogger.Warn(
+                "ComponentSettings",
+                $"Failed to delete component settings. ComponentId={componentId}; PlacementId={placementId}; Path={_settingsPath}",
+                ex);
+        }
+    }
+
+    public T LoadPluginSettings<T>(string componentId, string? placementId) where T : new()
+    {
+        try
+        {
+            lock (CacheGate)
+            {
+                var document = LoadDocumentLocked();
+                var instanceKey = BuildInstanceKey(componentId, placementId);
+                if (string.IsNullOrWhiteSpace(instanceKey) ||
+                    !document.PluginSettings.TryGetValue(instanceKey, out var settingsElement))
+                {
+                    return new T();
+                }
+
+                return JsonSerializer.Deserialize<T>(settingsElement.GetRawText(), SerializerOptions) ?? new T();
+            }
+        }
+        catch (Exception ex)
+        {
+            AppLogger.Warn(
+                "ComponentSettings",
+                $"Failed to load plugin settings. ComponentId={componentId}; PlacementId={placementId}; Path={_settingsPath}",
+                ex);
+            return new T();
+        }
+    }
+
+    public void SavePluginSettings<T>(string componentId, string? placementId, T settings)
+    {
+        var instanceKey = BuildInstanceKey(componentId, placementId);
+        if (string.IsNullOrWhiteSpace(instanceKey))
+        {
+            return;
+        }
+
+        try
+        {
+            lock (CacheGate)
+            {
+                var document = LoadDocumentLocked();
+                document.PluginSettings[instanceKey] = JsonSerializer.SerializeToElement(settings, SerializerOptions).Clone();
+                PersistDocumentLocked(document);
+            }
+        }
+        catch (Exception ex)
+        {
+            AppLogger.Warn(
+                "ComponentSettings",
+                $"Failed to save plugin settings. ComponentId={componentId}; PlacementId={placementId}; Path={_settingsPath}",
+                ex);
+        }
+    }
+
+    public void DeletePluginSettings(string componentId, string? placementId)
+    {
+        var instanceKey = BuildInstanceKey(componentId, placementId);
+        if (string.IsNullOrWhiteSpace(instanceKey))
+        {
+            return;
+        }
+
+        try
+        {
+            lock (CacheGate)
+            {
+                var document = LoadDocumentLocked();
+                if (document.PluginSettings.Remove(instanceKey))
+                {
+                    PersistDocumentLocked(document);
+                }
+            }
+        }
+        catch (Exception ex)
+        {
+            AppLogger.Warn(
+                "ComponentSettings",
+                $"Failed to delete plugin settings. ComponentId={componentId}; PlacementId={placementId}; Path={_settingsPath}",
+                ex);
+        }
+    }
+
+    public void SetScopedComponentContext(string componentId, string? placementId)
+    {
+        _scopedComponentId = componentId?.Trim() ?? string.Empty;
+        _scopedPlacementId = placementId?.Trim() ?? string.Empty;
+    }
+
+    public void ClearScopedComponentContext()
+    {
+        _scopedComponentId = string.Empty;
+        _scopedPlacementId = string.Empty;
+    }
+
+    public static void ApplyScopedContextToTarget(object? target, string componentId, string? placementId)
+    {
+        if (target is null)
+        {
+            return;
+        }
+
+        var flags = BindingFlags.Instance | BindingFlags.Public | BindingFlags.NonPublic;
+        foreach (var field in target.GetType().GetFields(flags))
+        {
+            if (field.FieldType != typeof(ComponentSettingsService))
+            {
+                continue;
+            }
+
+            if (field.GetValue(target) is ComponentSettingsService settingsService)
+            {
+                settingsService.SetScopedComponentContext(componentId, placementId);
+            }
+        }
+
+        foreach (var property in target.GetType().GetProperties(flags))
+        {
+            if (property.PropertyType != typeof(ComponentSettingsService) ||
+                !property.CanRead)
+            {
+                continue;
+            }
+
+            if (property.GetValue(target) is ComponentSettingsService settingsService)
+            {
+                settingsService.SetScopedComponentContext(componentId, placementId);
+            }
+        }
+    }
+
+    private bool TryGetCachedWithoutProbe(DateTime nowUtc, out ComponentSettingsDocumentSnapshot snapshot)
     {
         if (string.Equals(_cachedPath, _settingsPath, StringComparison.Ordinal) &&
             _cachedSnapshot is not null &&
@@ -121,7 +311,7 @@ public sealed class ComponentSettingsService
         return false;
     }
 
-    private bool TryGetCachedAfterProbe(DateTime writeTimeUtc, out ComponentSettingsSnapshot snapshot)
+    private bool TryGetCachedAfterProbe(DateTime writeTimeUtc, out ComponentSettingsDocumentSnapshot snapshot)
     {
         if (string.Equals(_cachedPath, _settingsPath, StringComparison.Ordinal) &&
             _cachedSnapshot is not null &&
@@ -135,17 +325,79 @@ public sealed class ComponentSettingsService
         return false;
     }
 
-    private ComponentSettingsSnapshot LoadSnapshotFromDisk()
+    private ComponentSettingsDocumentSnapshot LoadDocumentLocked()
+    {
+        var nowUtc = DateTime.UtcNow;
+        if (TryGetCachedWithoutProbe(nowUtc, out var cached))
+        {
+            return cached;
+        }
+
+        var hasFile = File.Exists(_settingsPath);
+        var writeTimeUtc = hasFile
+            ? File.GetLastWriteTimeUtc(_settingsPath)
+            : DateTime.MinValue;
+
+        _lastProbeUtc = nowUtc;
+        if (TryGetCachedAfterProbe(writeTimeUtc, out cached))
+        {
+            return cached;
+        }
+
+        ComponentSettingsDocumentSnapshot loadedSnapshot;
+        var loadedFromLegacy = false;
+        if (hasFile)
+        {
+            loadedSnapshot = LoadSnapshotFromDisk();
+        }
+        else if (TryLoadLegacySnapshot(out var migratedSnapshot))
+        {
+            loadedSnapshot = new ComponentSettingsDocumentSnapshot
+            {
+                DefaultSettings = NormalizeSnapshot(migratedSnapshot)
+            };
+            loadedFromLegacy = true;
+        }
+        else
+        {
+            loadedSnapshot = new ComponentSettingsDocumentSnapshot();
+        }
+
+        var normalizedSnapshot = NormalizeDocument(loadedSnapshot);
+        if (loadedFromLegacy)
+        {
+            writeTimeUtc = PersistSnapshotToDisk(normalizedSnapshot);
+        }
+
+        UpdateCache(normalizedSnapshot, writeTimeUtc, nowUtc);
+        return normalizedSnapshot.Clone();
+    }
+
+    private ComponentSettingsDocumentSnapshot LoadSnapshotFromDisk()
     {
         try
         {
             var json = File.ReadAllText(_settingsPath);
-            var snapshot = JsonSerializer.Deserialize<ComponentSettingsSnapshot>(json, SerializerOptions);
-            return NormalizeSnapshot(snapshot);
+            using var document = JsonDocument.Parse(json);
+            if (document.RootElement.ValueKind == JsonValueKind.Object &&
+                (document.RootElement.TryGetProperty("defaultSettings", out _) ||
+                 document.RootElement.TryGetProperty("instanceSettings", out _) ||
+                 document.RootElement.TryGetProperty("pluginSettings", out _)))
+            {
+                var snapshot = JsonSerializer.Deserialize<ComponentSettingsDocumentSnapshot>(json, SerializerOptions);
+                return NormalizeDocument(snapshot);
+            }
+
+            var legacySnapshot = JsonSerializer.Deserialize<ComponentSettingsSnapshot>(json, SerializerOptions);
+            return new ComponentSettingsDocumentSnapshot
+            {
+                DefaultSettings = NormalizeSnapshot(legacySnapshot)
+            };
         }
-        catch
+        catch (Exception ex)
         {
-            return new ComponentSettingsSnapshot();
+            AppLogger.Warn("ComponentSettings", $"Failed to deserialize component settings from '{_settingsPath}'.", ex);
+            return new ComponentSettingsDocumentSnapshot();
         }
     }
 
@@ -198,13 +450,20 @@ public sealed class ComponentSettingsService
 
             return true;
         }
-        catch
+        catch (Exception ex)
         {
+            AppLogger.Warn("ComponentSettings", $"Failed to migrate legacy component settings from '{_legacyAppSettingsPath}'.", ex);
             return false;
         }
     }
 
-    private DateTime PersistSnapshotToDisk(ComponentSettingsSnapshot snapshot)
+    private void PersistDocumentLocked(ComponentSettingsDocumentSnapshot snapshot)
+    {
+        var writeTimeUtc = PersistSnapshotToDisk(snapshot);
+        UpdateCache(snapshot, writeTimeUtc, DateTime.UtcNow);
+    }
+
+    private DateTime PersistSnapshotToDisk(ComponentSettingsDocumentSnapshot snapshot)
     {
         var directory = Path.GetDirectoryName(_settingsPath);
         if (!string.IsNullOrWhiteSpace(directory))
@@ -257,6 +516,40 @@ public sealed class ComponentSettingsService
         return normalized;
     }
 
+    private static ComponentSettingsDocumentSnapshot NormalizeDocument(ComponentSettingsDocumentSnapshot? snapshot)
+    {
+        var normalized = snapshot?.Clone() ?? new ComponentSettingsDocumentSnapshot();
+        normalized.DefaultSettings = NormalizeSnapshot(normalized.DefaultSettings);
+
+        var instanceSettings = new Dictionary<string, ComponentSettingsSnapshot>(StringComparer.OrdinalIgnoreCase);
+        foreach (var pair in normalized.InstanceSettings)
+        {
+            var key = NormalizeInstanceKey(pair.Key);
+            if (string.IsNullOrWhiteSpace(key))
+            {
+                continue;
+            }
+
+            instanceSettings[key] = NormalizeSnapshot(pair.Value);
+        }
+
+        var pluginSettings = new Dictionary<string, JsonElement>(StringComparer.OrdinalIgnoreCase);
+        foreach (var pair in normalized.PluginSettings)
+        {
+            var key = NormalizeInstanceKey(pair.Key);
+            if (string.IsNullOrWhiteSpace(key))
+            {
+                continue;
+            }
+
+            pluginSettings[key] = pair.Value.Clone();
+        }
+
+        normalized.InstanceSettings = instanceSettings;
+        normalized.PluginSettings = pluginSettings;
+        return normalized;
+    }
+
     private static List<ImportedClassScheduleSnapshot> NormalizeImportedSchedules(
         IReadOnlyList<ImportedClassScheduleSnapshot>? schedules)
     {
@@ -360,7 +653,30 @@ public sealed class ComponentSettingsService
         return RefreshIntervalCatalog.Normalize(minutes, 20);
     }
 
-    private void UpdateCache(ComponentSettingsSnapshot snapshot, DateTime writeTimeUtc, DateTime probeTimeUtc)
+    private static string BuildInstanceKey(string componentId, string? placementId)
+    {
+        var normalizedComponentId = componentId?.Trim() ?? string.Empty;
+        var normalizedPlacementId = placementId?.Trim() ?? string.Empty;
+        if (string.IsNullOrWhiteSpace(normalizedComponentId) || string.IsNullOrWhiteSpace(normalizedPlacementId))
+        {
+            return string.Empty;
+        }
+
+        return $"{normalizedComponentId}::{normalizedPlacementId}";
+    }
+
+    private static string NormalizeInstanceKey(string? key)
+    {
+        return key?.Trim() ?? string.Empty;
+    }
+
+    private bool HasScopedComponentContext()
+    {
+        return !string.IsNullOrWhiteSpace(_scopedComponentId) &&
+               !string.IsNullOrWhiteSpace(_scopedPlacementId);
+    }
+
+    private void UpdateCache(ComponentSettingsDocumentSnapshot snapshot, DateTime writeTimeUtc, DateTime probeTimeUtc)
     {
         _cachedPath = _settingsPath;
         _cachedSnapshot = snapshot.Clone();
@@ -368,6 +684,39 @@ public sealed class ComponentSettingsService
         _lastProbeUtc = probeTimeUtc;
     }
 
+    private sealed class ComponentSettingsDocumentSnapshot
+    {
+        public ComponentSettingsSnapshot DefaultSettings { get; set; } = new();
+
+        public Dictionary<string, ComponentSettingsSnapshot> InstanceSettings { get; set; } =
+            new(StringComparer.OrdinalIgnoreCase);
+
+        public Dictionary<string, JsonElement> PluginSettings { get; set; } =
+            new(StringComparer.OrdinalIgnoreCase);
+
+        public ComponentSettingsDocumentSnapshot Clone()
+        {
+            var clone = new ComponentSettingsDocumentSnapshot
+            {
+                DefaultSettings = DefaultSettings?.Clone() ?? new ComponentSettingsSnapshot(),
+                InstanceSettings = new Dictionary<string, ComponentSettingsSnapshot>(StringComparer.OrdinalIgnoreCase),
+                PluginSettings = new Dictionary<string, JsonElement>(StringComparer.OrdinalIgnoreCase)
+            };
+
+            foreach (var pair in InstanceSettings)
+            {
+                clone.InstanceSettings[pair.Key] = pair.Value?.Clone() ?? new ComponentSettingsSnapshot();
+            }
+
+            foreach (var pair in PluginSettings)
+            {
+                clone.PluginSettings[pair.Key] = pair.Value.Clone();
+            }
+
+            return clone;
+        }
+    }
+
     private sealed class LegacyComponentSettingsSnapshot
     {
         public string DailyArtworkMirrorSource { get; set; } = DailyArtworkMirrorSources.Overseas;

LanMountainDesktop/Services/DesktopComponentRegistryFactory.cs

@@ -0,0 +1,174 @@
+using System;
+using System.Collections.Generic;
+using System.Diagnostics;
+using System.IO;
+using System.Linq;
+using Avalonia;
+using Avalonia.Controls;
+using Avalonia.Layout;
+using Avalonia.Media;
+using LanMountainDesktop.ComponentSystem;
+using LanMountainDesktop.ComponentSystem.Extensions;
+using LanMountainDesktop.PluginSdk;
+using LanMountainDesktop.Views.Components;
+
+namespace LanMountainDesktop.Services;
+
+public static class DesktopComponentRegistryFactory
+{
+    public static ComponentRegistry Create(PluginRuntimeService? pluginRuntimeService)
+    {
+        var registry = ComponentRegistry
+            .CreateDefault()
+            .RegisterExtensions(
+                JsonComponentExtensionProvider.LoadProvidersFromDirectory(
+                    Path.Combine(AppContext.BaseDirectory, "Extensions", "Components")));
+
+        var pluginDefinitions = GetPluginDefinitions(registry, pluginRuntimeService);
+        return pluginDefinitions.Count == 0
+            ? registry
+            : registry.RegisterComponents(pluginDefinitions);
+    }
+
+    public static DesktopComponentRuntimeRegistry CreateRuntimeRegistry(
+        ComponentRegistry componentRegistry,
+        PluginRuntimeService? pluginRuntimeService)
+    {
+        var registrations = DesktopComponentRuntimeRegistry.GetDefaultRegistrations().ToList();
+        var registeredIds = new HashSet<string>(
+            registrations.Select(registration => registration.ComponentId),
+            StringComparer.OrdinalIgnoreCase);
+
+        if (pluginRuntimeService is not null)
+        {
+            foreach (var contribution in pluginRuntimeService.DesktopComponents)
+            {
+                var registration = contribution.Registration;
+                if (!componentRegistry.TryGetDefinition(registration.ComponentId, out _))
+                {
+                    continue;
+                }
+
+                if (!registeredIds.Add(registration.ComponentId))
+                {
+                    Debug.WriteLine(
+                        $"[PluginRuntime] Skipped plugin widget '{registration.ComponentId}' from '{contribution.Plugin.Manifest.Id}' because a runtime registration already exists.");
+                    continue;
+                }
+
+                registrations.Add(new DesktopComponentRuntimeRegistration(
+                    registration.ComponentId,
+                    registration.DisplayNameLocalizationKey,
+                    factoryContext => CreatePluginControl(contribution, factoryContext),
+                    registration.CornerRadiusResolver));
+            }
+        }
+
+        return new DesktopComponentRuntimeRegistry(componentRegistry, registrations);
+    }
+
+    private static List<DesktopComponentDefinition> GetPluginDefinitions(
+        ComponentRegistry baseRegistry,
+        PluginRuntimeService? pluginRuntimeService)
+    {
+        var definitions = new List<DesktopComponentDefinition>();
+        if (pluginRuntimeService is null)
+        {
+            return definitions;
+        }
+
+        var knownIds = new HashSet<string>(
+            baseRegistry.GetAll().Select(definition => definition.Id),
+            StringComparer.OrdinalIgnoreCase);
+
+        foreach (var contribution in pluginRuntimeService.DesktopComponents)
+        {
+            var registration = contribution.Registration;
+            if (!knownIds.Add(registration.ComponentId))
+            {
+                Debug.WriteLine(
+                    $"[PluginRuntime] Skipped plugin widget '{registration.ComponentId}' from '{contribution.Plugin.Manifest.Id}' because the component id already exists.");
+                continue;
+            }
+
+            definitions.Add(new DesktopComponentDefinition(
+                registration.ComponentId,
+                registration.DisplayName,
+                registration.IconKey,
+                registration.Category,
+                registration.MinWidthCells,
+                registration.MinHeightCells,
+                registration.AllowStatusBarPlacement,
+                registration.AllowDesktopPlacement,
+                registration.ResizeMode == PluginDesktopComponentResizeMode.Free
+                    ? DesktopComponentResizeMode.Free
+                    : DesktopComponentResizeMode.Proportional));
+        }
+
+        return definitions;
+    }
+
+    private static Control CreatePluginControl(
+        PluginDesktopComponentContribution contribution,
+        DesktopComponentControlFactoryContext context)
+    {
+        try
+        {
+            var pluginContext = new PluginDesktopComponentContext(
+                contribution.Plugin.Manifest,
+                contribution.Plugin.Context.PluginDirectory,
+                contribution.Plugin.Context.DataDirectory,
+                contribution.Plugin.Context.Services,
+                contribution.Plugin.Context.Properties,
+                contribution.Registration.ComponentId,
+                context.PlacementId,
+                context.CellSize);
+
+            return contribution.Registration.ControlFactory(pluginContext);
+        }
+        catch (Exception ex)
+        {
+            Debug.WriteLine(
+                $"[PluginRuntime] Failed to create widget '{contribution.Registration.ComponentId}' from '{contribution.Plugin.Manifest.Id}': {ex}");
+            return CreatePluginErrorControl(contribution, ex);
+        }
+    }
+
+    private static Control CreatePluginErrorControl(
+        PluginDesktopComponentContribution contribution,
+        Exception exception)
+    {
+        return new Border
+        {
+            Background = new SolidColorBrush(Color.Parse("#332B0F16")),
+            BorderBrush = new SolidColorBrush(Color.Parse("#66F97316")),
+            BorderThickness = new Thickness(1),
+            CornerRadius = new CornerRadius(16),
+            Padding = new Thickness(12),
+            Child = new StackPanel
+            {
+                Spacing = 6,
+                Children =
+                {
+                    new TextBlock
+                    {
+                        Text = contribution.Registration.DisplayName,
+                        FontSize = 14,
+                        FontWeight = FontWeight.SemiBold,
+                        TextWrapping = TextWrapping.Wrap
+                    },
+                    new TextBlock
+                    {
+                        Text = $"Plugin {contribution.Plugin.Manifest.Name} failed to create this widget.",
+                        TextWrapping = TextWrapping.Wrap
+                    },
+                    new TextBlock
+                    {
+                        Text = exception.Message,
+                        TextWrapping = TextWrapping.Wrap
+                    }
+                }
+            }
+        };
+    }
+}

LanMountainDesktop/Services/DesktopLayoutSettingsService.cs

@@ -0,0 +1,251 @@
+using System;
+using System.Collections.Generic;
+using System.IO;
+using System.Text.Json;
+using LanMountainDesktop.Models;
+
+namespace LanMountainDesktop.Services;
+
+public sealed class DesktopLayoutSettingsService
+{
+    private static readonly JsonSerializerOptions SerializerOptions = new()
+    {
+        WriteIndented = true
+    };
+    private static readonly object CacheGate = new();
+    private static readonly TimeSpan CacheProbeInterval = TimeSpan.FromMilliseconds(400);
+
+    private static string? _cachedPath;
+    private static DesktopLayoutSettingsSnapshot? _cachedSnapshot;
+    private static DateTime _cachedWriteTimeUtc = DateTime.MinValue;
+    private static DateTime _lastProbeUtc = DateTime.MinValue;
+
+    private readonly string _settingsPath;
+    private readonly string _legacyAppSettingsPath;
+
+    public DesktopLayoutSettingsService()
+    {
+        var appData = Environment.GetFolderPath(Environment.SpecialFolder.LocalApplicationData);
+        var settingsDirectory = Path.Combine(appData, "LanMountainDesktop");
+        _settingsPath = Path.Combine(settingsDirectory, "desktop-layout-settings.json");
+        _legacyAppSettingsPath = Path.Combine(settingsDirectory, "settings.json");
+    }
+
+    public DesktopLayoutSettingsSnapshot Load()
+    {
+        try
+        {
+            lock (CacheGate)
+            {
+                var nowUtc = DateTime.UtcNow;
+                if (TryGetCachedWithoutProbe(nowUtc, out var cached))
+                {
+                    return cached;
+                }
+
+                var hasFile = File.Exists(_settingsPath);
+                var writeTimeUtc = hasFile
+                    ? File.GetLastWriteTimeUtc(_settingsPath)
+                    : DateTime.MinValue;
+
+                _lastProbeUtc = nowUtc;
+                if (TryGetCachedAfterProbe(writeTimeUtc, out cached))
+                {
+                    return cached;
+                }
+
+                DesktopLayoutSettingsSnapshot loadedSnapshot;
+                var loadedFromLegacy = false;
+                if (hasFile)
+                {
+                    loadedSnapshot = LoadSnapshotFromDisk();
+                }
+                else if (TryLoadLegacySnapshot(out var migratedSnapshot))
+                {
+                    loadedSnapshot = migratedSnapshot;
+                    loadedFromLegacy = true;
+                }
+                else
+                {
+                    loadedSnapshot = new DesktopLayoutSettingsSnapshot();
+                }
+
+                var normalizedSnapshot = NormalizeSnapshot(loadedSnapshot);
+                if (loadedFromLegacy)
+                {
+                    writeTimeUtc = PersistSnapshotToDisk(normalizedSnapshot);
+                }
+
+                UpdateCache(normalizedSnapshot, writeTimeUtc, nowUtc);
+                return normalizedSnapshot.Clone();
+            }
+        }
+        catch (Exception ex)
+        {
+            AppLogger.Warn("DesktopLayout", $"Failed to load desktop layout settings from '{_settingsPath}'.", ex);
+            return new DesktopLayoutSettingsSnapshot();
+        }
+    }
+
+    public void Save(DesktopLayoutSettingsSnapshot snapshot)
+    {
+        var snapshotToPersist = NormalizeSnapshot(snapshot);
+
+        try
+        {
+            var writeTimeUtc = PersistSnapshotToDisk(snapshotToPersist);
+
+            lock (CacheGate)
+            {
+                UpdateCache(snapshotToPersist, writeTimeUtc, DateTime.UtcNow);
+            }
+        }
+        catch (Exception ex)
+        {
+            AppLogger.Warn("DesktopLayout", $"Failed to save desktop layout settings to '{_settingsPath}'.", ex);
+        }
+    }
+
+    private bool TryGetCachedWithoutProbe(DateTime nowUtc, out DesktopLayoutSettingsSnapshot snapshot)
+    {
+        if (string.Equals(_cachedPath, _settingsPath, StringComparison.Ordinal) &&
+            _cachedSnapshot is not null &&
+            nowUtc - _lastProbeUtc < CacheProbeInterval)
+        {
+            snapshot = _cachedSnapshot.Clone();
+            return true;
+        }
+
+        snapshot = null!;
+        return false;
+    }
+
+    private bool TryGetCachedAfterProbe(DateTime writeTimeUtc, out DesktopLayoutSettingsSnapshot snapshot)
+    {
+        if (string.Equals(_cachedPath, _settingsPath, StringComparison.Ordinal) &&
+            _cachedSnapshot is not null &&
+            writeTimeUtc == _cachedWriteTimeUtc)
+        {
+            snapshot = _cachedSnapshot.Clone();
+            return true;
+        }
+
+        snapshot = null!;
+        return false;
+    }
+
+    private DesktopLayoutSettingsSnapshot LoadSnapshotFromDisk()
+    {
+        try
+        {
+            var json = File.ReadAllText(_settingsPath);
+            var snapshot = JsonSerializer.Deserialize<DesktopLayoutSettingsSnapshot>(json, SerializerOptions);
+            return NormalizeSnapshot(snapshot);
+        }
+        catch (Exception ex)
+        {
+            AppLogger.Warn("DesktopLayout", $"Failed to deserialize desktop layout settings from '{_settingsPath}'.", ex);
+            return new DesktopLayoutSettingsSnapshot();
+        }
+    }
+
+    private bool TryLoadLegacySnapshot(out DesktopLayoutSettingsSnapshot snapshot)
+    {
+        snapshot = new DesktopLayoutSettingsSnapshot();
+
+        try
+        {
+            if (!File.Exists(_legacyAppSettingsPath))
+            {
+                return false;
+            }
+
+            var legacyJson = File.ReadAllText(_legacyAppSettingsPath);
+            var legacy = JsonSerializer.Deserialize<LegacyDesktopLayoutSettingsSnapshot>(legacyJson, SerializerOptions);
+            if (legacy is null)
+            {
+                return false;
+            }
+
+            snapshot = new DesktopLayoutSettingsSnapshot
+            {
+                DesktopPageCount = legacy.DesktopPageCount,
+                CurrentDesktopSurfaceIndex = legacy.CurrentDesktopSurfaceIndex,
+                DesktopComponentPlacements = legacy.DesktopComponentPlacements ?? []
+            };
+
+            return true;
+        }
+        catch (Exception ex)
+        {
+            AppLogger.Warn("DesktopLayout", $"Failed to migrate legacy desktop layout settings from '{_legacyAppSettingsPath}'.", ex);
+            return false;
+        }
+    }
+
+    private DateTime PersistSnapshotToDisk(DesktopLayoutSettingsSnapshot snapshot)
+    {
+        var directory = Path.GetDirectoryName(_settingsPath);
+        if (!string.IsNullOrWhiteSpace(directory))
+        {
+            Directory.CreateDirectory(directory);
+        }
+
+        var json = JsonSerializer.Serialize(snapshot, SerializerOptions);
+        File.WriteAllText(_settingsPath, json);
+
+        return File.Exists(_settingsPath)
+            ? File.GetLastWriteTimeUtc(_settingsPath)
+            : DateTime.UtcNow;
+    }
+
+    private static DesktopLayoutSettingsSnapshot NormalizeSnapshot(DesktopLayoutSettingsSnapshot? snapshot)
+    {
+        var normalized = snapshot?.Clone() ?? new DesktopLayoutSettingsSnapshot();
+        normalized.DesktopPageCount = Math.Max(1, normalized.DesktopPageCount);
+        normalized.CurrentDesktopSurfaceIndex = Math.Max(0, normalized.CurrentDesktopSurfaceIndex);
+
+        var placements = new List<DesktopComponentPlacementSnapshot>(normalized.DesktopComponentPlacements?.Count ?? 0);
+        if (normalized.DesktopComponentPlacements is not null)
+        {
+            foreach (var placement in normalized.DesktopComponentPlacements)
+            {
+                if (placement is null)
+                {
+                    continue;
+                }
+
+                placements.Add(new DesktopComponentPlacementSnapshot
+                {
+                    PlacementId = placement.PlacementId?.Trim() ?? string.Empty,
+                    PageIndex = Math.Max(0, placement.PageIndex),
+                    ComponentId = placement.ComponentId?.Trim() ?? string.Empty,
+                    Row = Math.Max(0, placement.Row),
+                    Column = Math.Max(0, placement.Column),
+                    WidthCells = Math.Max(1, placement.WidthCells),
+                    HeightCells = Math.Max(1, placement.HeightCells)
+                });
+            }
+        }
+
+        normalized.DesktopComponentPlacements = placements;
+        return normalized;
+    }
+
+    private void UpdateCache(DesktopLayoutSettingsSnapshot snapshot, DateTime writeTimeUtc, DateTime probeTimeUtc)
+    {
+        _cachedPath = _settingsPath;
+        _cachedSnapshot = snapshot.Clone();
+        _cachedWriteTimeUtc = writeTimeUtc;
+        _lastProbeUtc = probeTimeUtc;
+    }
+
+    private sealed class LegacyDesktopLayoutSettingsSnapshot
+    {
+        public int DesktopPageCount { get; set; } = 1;
+
+        public int CurrentDesktopSurfaceIndex { get; set; }
+
+        public List<DesktopComponentPlacementSnapshot>? DesktopComponentPlacements { get; set; }
+    }
+}

LanMountainDesktop/Services/FileOperationRetryHelper.cs

@@ -0,0 +1,98 @@
+using System;
+using System.IO;
+using System.Threading;
+
+namespace LanMountainDesktop.Services;
+
+internal static class FileOperationRetryHelper
+{
+    private static readonly TimeSpan[] RetryDelays =
+    [
+        TimeSpan.FromMilliseconds(120),
+        TimeSpan.FromMilliseconds(250),
+        TimeSpan.FromMilliseconds(500)
+    ];
+
+    public static void CopyWithRetry(string sourceFilePath, string destinationFilePath, bool overwrite, string category)
+    {
+        Retry(
+            () => File.Copy(sourceFilePath, destinationFilePath, overwrite),
+            category,
+            $"Copy '{sourceFilePath}' -> '{destinationFilePath}'");
+    }
+
+    public static void MoveWithOverwriteRetry(string sourceFilePath, string destinationFilePath, string category)
+    {
+        Retry(
+            () => File.Move(sourceFilePath, destinationFilePath, overwrite: true),
+            category,
+            $"Move '{sourceFilePath}' -> '{destinationFilePath}'");
+    }
+
+    public static void DeleteFileWithRetry(string filePath, string category)
+    {
+        Retry(
+            () =>
+            {
+                if (File.Exists(filePath))
+                {
+                    File.Delete(filePath);
+                }
+            },
+            category,
+            $"Delete file '{filePath}'");
+    }
+
+    public static void DeleteDirectoryWithRetry(string directoryPath, bool recursive, string category)
+    {
+        Retry(
+            () =>
+            {
+                if (Directory.Exists(directoryPath))
+                {
+                    Directory.Delete(directoryPath, recursive);
+                }
+            },
+            category,
+            $"Delete directory '{directoryPath}'");
+    }
+
+    private static void Retry(Action action, string category, string operationDescription)
+    {
+        Exception? lastException = null;
+
+        for (var attempt = 0; attempt <= RetryDelays.Length; attempt++)
+        {
+            try
+            {
+                action();
+                return;
+            }
+            catch (Exception ex) when (IsRetriable(ex))
+            {
+                lastException = ex;
+                if (attempt >= RetryDelays.Length)
+                {
+                    break;
+                }
+
+                var delay = RetryDelays[attempt];
+                AppLogger.Warn(
+                    category,
+                    $"{operationDescription} failed on attempt {attempt + 1}. Retrying after {delay.TotalMilliseconds:0} ms.",
+                    ex);
+                Thread.Sleep(delay);
+            }
+        }
+
+        if (lastException is not null)
+        {
+            throw lastException;
+        }
+    }
+
+    private static bool IsRetriable(Exception exception)
+    {
+        return exception is IOException or UnauthorizedAccessException;
+    }
+}

LanMountainDesktop/Services/GitHubReleaseUpdateService.cs

@@ -45,6 +45,7 @@ public sealed class GitHubReleaseUpdateService : IDisposable
     private readonly string _owner;
     private readonly string _repo;
     private readonly HttpClient _httpClient;
+    private readonly ResumableDownloadService _downloadService;
     private readonly bool _ownsHttpClient;
 
     public GitHubReleaseUpdateService(
@@ -69,6 +70,8 @@ public sealed class GitHubReleaseUpdateService : IDisposable
             _ownsHttpClient = false;
         }
 
+        _downloadService = new ResumableDownloadService(_httpClient);
+
         if (!_httpClient.DefaultRequestHeaders.UserAgent.Any())
         {
             _httpClient.DefaultRequestHeaders.UserAgent.ParseAdd("LanMountainDesktop-Updater/1.0");
@@ -187,59 +190,37 @@ public sealed class GitHubReleaseUpdateService : IDisposable
             return new UpdateDownloadResult(false, null, "Destination file path is empty.");
         }
 
-        try
+        var progressAdapter = progress is null
+            ? null
+            : new Progress<DownloadProgressInfo>(info => progress.Report(info.Progress));
+
+        var result = await _downloadService.DownloadAsync(
+            asset.BrowserDownloadUrl,
+            destinationFilePath,
+            new DownloadOptions(ExpectedSizeBytes: asset.SizeBytes > 0 ? asset.SizeBytes : null),
+            progressAdapter,
+            cancellationToken);
+
+        return result.Success
+            ? new UpdateDownloadResult(true, result.FilePath ?? destinationFilePath, null)
+            : new UpdateDownloadResult(false, null, result.ErrorMessage);
+    }
+
+    public async Task<GitHubReleaseInfo?> GetReleaseByTagAsync(
+        string tagName,
+        CancellationToken cancellationToken = default)
+    {
+        if (string.IsNullOrWhiteSpace(tagName))
         {
-            var directory = Path.GetDirectoryName(destinationFilePath);
-            if (!string.IsNullOrWhiteSpace(directory))
-            {
-                Directory.CreateDirectory(directory);
-            }
-
-            using var response = await _httpClient.GetAsync(
-                asset.BrowserDownloadUrl,
-                HttpCompletionOption.ResponseHeadersRead,
-                cancellationToken);
-
-            if (!response.IsSuccessStatusCode)
-            {
-                return new UpdateDownloadResult(
-                    false,
-                    null,
-                    $"HTTP {(int)response.StatusCode}: {response.ReasonPhrase}");
-            }
-
-            var contentLength = response.Content.Headers.ContentLength ??
-                                (asset.SizeBytes > 0 ? asset.SizeBytes : -1);
-
-            await using var sourceStream = await response.Content.ReadAsStreamAsync(cancellationToken);
-            await using var destinationStream = File.Create(destinationFilePath);
-
-            var buffer = new byte[81920];
-            long totalRead = 0;
-            int read;
-            while ((read = await sourceStream.ReadAsync(buffer, cancellationToken)) > 0)
-            {
-                await destinationStream.WriteAsync(buffer.AsMemory(0, read), cancellationToken);
-                totalRead += read;
-
-                if (contentLength > 0)
-                {
-                    progress?.Report(Math.Clamp(totalRead / (double)contentLength, 0d, 1d));
-                }
-            }
-
-            progress?.Report(1d);
-
-            return new UpdateDownloadResult(true, destinationFilePath, null);
-        }
-        catch (OperationCanceledException)
-        {
-            throw;
-        }
-        catch (Exception ex)
-        {
-            return new UpdateDownloadResult(false, null, ex.Message);
+            return null;
         }
+
+        var url =
+            $"https://api.github.com/repos/{_owner}/{_repo}/releases/tags/{Uri.EscapeDataString(tagName.Trim())}";
+        var responseText = await GetResponseTextAsync(url, cancellationToken);
+
+        using var document = JsonDocument.Parse(responseText);
+        return ParseRelease(document.RootElement);
     }
 
     private async Task<GitHubReleaseInfo?> GetLatestStableReleaseAsync(CancellationToken cancellationToken)

LanMountainDesktop/Services/IComponentInstanceSettingsStore.cs

@@ -0,0 +1,22 @@
+using LanMountainDesktop.Models;
+
+namespace LanMountainDesktop.Services;
+
+public interface IComponentInstanceSettingsStore
+{
+    ComponentSettingsSnapshot Load();
+
+    void Save(ComponentSettingsSnapshot snapshot);
+
+    ComponentSettingsSnapshot LoadForComponent(string componentId, string? placementId);
+
+    void SaveForComponent(string componentId, string? placementId, ComponentSettingsSnapshot snapshot);
+
+    void DeleteForComponent(string componentId, string? placementId);
+
+    T LoadPluginSettings<T>(string componentId, string? placementId) where T : new();
+
+    void SavePluginSettings<T>(string componentId, string? placementId, T settings);
+
+    void DeletePluginSettings(string componentId, string? placementId);
+}

LanMountainDesktop/Services/LauncherSettingsService.cs

@@ -0,0 +1,245 @@
+using System;
+using System.Collections.Generic;
+using System.IO;
+using System.Linq;
+using System.Text.Json;
+using LanMountainDesktop.Models;
+
+namespace LanMountainDesktop.Services;
+
+public sealed class LauncherSettingsService
+{
+    public static event Action<string>? SettingsSaved;
+
+    private static readonly JsonSerializerOptions SerializerOptions = new()
+    {
+        WriteIndented = true
+    };
+    private static readonly object CacheGate = new();
+    private static readonly TimeSpan CacheProbeInterval = TimeSpan.FromMilliseconds(400);
+
+    private static string? _cachedPath;
+    private static LauncherSettingsSnapshot? _cachedSnapshot;
+    private static DateTime _cachedWriteTimeUtc = DateTime.MinValue;
+    private static DateTime _lastProbeUtc = DateTime.MinValue;
+
+    private readonly string _settingsPath;
+    private readonly string _legacyAppSettingsPath;
+
+    public string InstanceId { get; } = Guid.NewGuid().ToString("N");
+
+    public LauncherSettingsService()
+    {
+        var appData = Environment.GetFolderPath(Environment.SpecialFolder.LocalApplicationData);
+        var settingsDirectory = Path.Combine(appData, "LanMountainDesktop");
+        _settingsPath = Path.Combine(settingsDirectory, "launcher-settings.json");
+        _legacyAppSettingsPath = Path.Combine(settingsDirectory, "settings.json");
+    }
+
+    public LauncherSettingsSnapshot Load()
+    {
+        try
+        {
+            lock (CacheGate)
+            {
+                var nowUtc = DateTime.UtcNow;
+                if (TryGetCachedWithoutProbe(nowUtc, out var cached))
+                {
+                    return cached;
+                }
+
+                var hasFile = File.Exists(_settingsPath);
+                var writeTimeUtc = hasFile
+                    ? File.GetLastWriteTimeUtc(_settingsPath)
+                    : DateTime.MinValue;
+
+                _lastProbeUtc = nowUtc;
+                if (TryGetCachedAfterProbe(writeTimeUtc, out cached))
+                {
+                    return cached;
+                }
+
+                LauncherSettingsSnapshot loadedSnapshot;
+                var loadedFromLegacy = false;
+                if (hasFile)
+                {
+                    loadedSnapshot = LoadSnapshotFromDisk();
+                }
+                else if (TryLoadLegacySnapshot(out var migratedSnapshot))
+                {
+                    loadedSnapshot = migratedSnapshot;
+                    loadedFromLegacy = true;
+                }
+                else
+                {
+                    loadedSnapshot = new LauncherSettingsSnapshot();
+                }
+
+                var normalizedSnapshot = NormalizeSnapshot(loadedSnapshot);
+                if (loadedFromLegacy)
+                {
+                    writeTimeUtc = PersistSnapshotToDisk(normalizedSnapshot);
+                }
+
+                UpdateCache(normalizedSnapshot, writeTimeUtc, nowUtc);
+                return normalizedSnapshot.Clone();
+            }
+        }
+        catch (Exception ex)
+        {
+            AppLogger.Warn("LauncherSettings", $"Failed to load launcher settings from '{_settingsPath}'.", ex);
+            return new LauncherSettingsSnapshot();
+        }
+    }
+
+    public void Save(LauncherSettingsSnapshot snapshot)
+    {
+        var snapshotToPersist = NormalizeSnapshot(snapshot);
+
+        try
+        {
+            var writeTimeUtc = PersistSnapshotToDisk(snapshotToPersist);
+
+            lock (CacheGate)
+            {
+                UpdateCache(snapshotToPersist, writeTimeUtc, DateTime.UtcNow);
+            }
+
+            SettingsSaved?.Invoke(InstanceId);
+        }
+        catch (Exception ex)
+        {
+            AppLogger.Warn("LauncherSettings", $"Failed to save launcher settings to '{_settingsPath}'.", ex);
+        }
+    }
+
+    private bool TryGetCachedWithoutProbe(DateTime nowUtc, out LauncherSettingsSnapshot snapshot)
+    {
+        if (string.Equals(_cachedPath, _settingsPath, StringComparison.Ordinal) &&
+            _cachedSnapshot is not null &&
+            nowUtc - _lastProbeUtc < CacheProbeInterval)
+        {
+            snapshot = _cachedSnapshot.Clone();
+            return true;
+        }
+
+        snapshot = null!;
+        return false;
+    }
+
+    private bool TryGetCachedAfterProbe(DateTime writeTimeUtc, out LauncherSettingsSnapshot snapshot)
+    {
+        if (string.Equals(_cachedPath, _settingsPath, StringComparison.Ordinal) &&
+            _cachedSnapshot is not null &&
+            writeTimeUtc == _cachedWriteTimeUtc)
+        {
+            snapshot = _cachedSnapshot.Clone();
+            return true;
+        }
+
+        snapshot = null!;
+        return false;
+    }
+
+    private LauncherSettingsSnapshot LoadSnapshotFromDisk()
+    {
+        try
+        {
+            var json = File.ReadAllText(_settingsPath);
+            var snapshot = JsonSerializer.Deserialize<LauncherSettingsSnapshot>(json, SerializerOptions);
+            return NormalizeSnapshot(snapshot);
+        }
+        catch (Exception ex)
+        {
+            AppLogger.Warn("LauncherSettings", $"Failed to deserialize launcher settings from '{_settingsPath}'.", ex);
+            return new LauncherSettingsSnapshot();
+        }
+    }
+
+    private bool TryLoadLegacySnapshot(out LauncherSettingsSnapshot snapshot)
+    {
+        snapshot = new LauncherSettingsSnapshot();
+
+        try
+        {
+            if (!File.Exists(_legacyAppSettingsPath))
+            {
+                return false;
+            }
+
+            var legacyJson = File.ReadAllText(_legacyAppSettingsPath);
+            var legacy = JsonSerializer.Deserialize<LegacyLauncherSettingsSnapshot>(legacyJson, SerializerOptions);
+            if (legacy is null)
+            {
+                return false;
+            }
+
+            snapshot = new LauncherSettingsSnapshot
+            {
+                HiddenLauncherFolderPaths = legacy.HiddenLauncherFolderPaths ?? [],
+                HiddenLauncherAppPaths = legacy.HiddenLauncherAppPaths ?? []
+            };
+
+            return true;
+        }
+        catch (Exception ex)
+        {
+            AppLogger.Warn("LauncherSettings", $"Failed to migrate legacy launcher settings from '{_legacyAppSettingsPath}'.", ex);
+            return false;
+        }
+    }
+
+    private DateTime PersistSnapshotToDisk(LauncherSettingsSnapshot snapshot)
+    {
+        var directory = Path.GetDirectoryName(_settingsPath);
+        if (!string.IsNullOrWhiteSpace(directory))
+        {
+            Directory.CreateDirectory(directory);
+        }
+
+        var json = JsonSerializer.Serialize(snapshot, SerializerOptions);
+        File.WriteAllText(_settingsPath, json);
+
+        return File.Exists(_settingsPath)
+            ? File.GetLastWriteTimeUtc(_settingsPath)
+            : DateTime.UtcNow;
+    }
+
+    private static LauncherSettingsSnapshot NormalizeSnapshot(LauncherSettingsSnapshot? snapshot)
+    {
+        var normalized = snapshot?.Clone() ?? new LauncherSettingsSnapshot();
+        normalized.HiddenLauncherFolderPaths = NormalizeKeys(normalized.HiddenLauncherFolderPaths);
+        normalized.HiddenLauncherAppPaths = NormalizeKeys(normalized.HiddenLauncherAppPaths);
+        return normalized;
+    }
+
+    private static List<string> NormalizeKeys(IReadOnlyList<string>? values)
+    {
+        if (values is null || values.Count == 0)
+        {
+            return [];
+        }
+
+        return values
+            .Where(value => !string.IsNullOrWhiteSpace(value))
+            .Select(value => value.Trim())
+            .Distinct(StringComparer.OrdinalIgnoreCase)
+            .OrderBy(value => value, StringComparer.OrdinalIgnoreCase)
+            .ToList();
+    }
+
+    private void UpdateCache(LauncherSettingsSnapshot snapshot, DateTime writeTimeUtc, DateTime probeTimeUtc)
+    {
+        _cachedPath = _settingsPath;
+        _cachedSnapshot = snapshot.Clone();
+        _cachedWriteTimeUtc = writeTimeUtc;
+        _lastProbeUtc = probeTimeUtc;
+    }
+
+    private sealed class LegacyLauncherSettingsSnapshot
+    {
+        public List<string>? HiddenLauncherFolderPaths { get; set; }
+
+        public List<string>? HiddenLauncherAppPaths { get; set; }
+    }
+}

LanMountainDesktop/Services/PendingRestartStateService.cs

@@ -0,0 +1,55 @@
+using System;
+using System.Collections.Generic;
+
+namespace LanMountainDesktop.Services;
+
+public static class PendingRestartStateService
+{
+    public const string RenderModeReason = "RenderMode";
+    public const string PluginCatalogReason = "PluginCatalog";
+
+    private static readonly object Gate = new();
+    private static readonly HashSet<string> PendingReasons = new(StringComparer.OrdinalIgnoreCase);
+
+    public static event Action? StateChanged;
+
+    public static bool HasPendingRestart
+    {
+        get
+        {
+            lock (Gate)
+            {
+                return PendingReasons.Count > 0;
+            }
+        }
+    }
+
+    public static bool HasPendingReason(string reason)
+    {
+        lock (Gate)
+        {
+            return PendingReasons.Contains(reason);
+        }
+    }
+
+    public static void SetPending(string reason, bool pending)
+    {
+        if (string.IsNullOrWhiteSpace(reason))
+        {
+            return;
+        }
+
+        var changed = false;
+        lock (Gate)
+        {
+            changed = pending
+                ? PendingReasons.Add(reason)
+                : PendingReasons.Remove(reason);
+        }
+
+        if (changed)
+        {
+            StateChanged?.Invoke();
+        }
+    }
+}

LanMountainDesktop/Services/ResumableDownloadService.cs

@@ -0,0 +1,412 @@
+using System;
+using System.Collections.Concurrent;
+using System.IO;
+using System.Threading;
+using System.Threading.Tasks;
+using Downloader;
+
+namespace LanMountainDesktop.Services;
+
+public sealed record DownloadProgressInfo(
+    long DownloadedBytes,
+    long? TotalBytes,
+    double Progress,
+    bool IsResuming,
+    bool IsParallel);
+
+public sealed record DownloadOptions(
+    long? ExpectedSizeBytes = null,
+    int MaxParallelSegments = 4,
+    int ParallelThresholdBytes = 8 * 1024 * 1024,
+    int BufferSize = 128 * 1024);
+
+public sealed record DownloadResult(
+    bool Success,
+    string? FilePath,
+    string? ErrorMessage,
+    bool UsedResume,
+    bool UsedParallelDownload);
+
+public sealed class ResumableDownloadService
+{
+    private static readonly ConcurrentDictionary<string, SemaphoreSlim> DestinationGates =
+        new(StringComparer.OrdinalIgnoreCase);
+
+    public ResumableDownloadService(System.Net.Http.HttpClient httpClient)
+    {
+    }
+
+    public async Task<DownloadResult> DownloadAsync(
+        string source,
+        string destinationFilePath,
+        DownloadOptions? options = null,
+        IProgress<DownloadProgressInfo>? progress = null,
+        CancellationToken cancellationToken = default)
+    {
+        ArgumentException.ThrowIfNullOrWhiteSpace(source);
+        ArgumentException.ThrowIfNullOrWhiteSpace(destinationFilePath);
+
+        var normalizedOptions = NormalizeOptions(options);
+        var fullDestinationPath = Path.GetFullPath(destinationFilePath);
+        var destinationGate = DestinationGates.GetOrAdd(
+            fullDestinationPath,
+            static _ => new SemaphoreSlim(1, 1));
+
+        await destinationGate.WaitAsync(cancellationToken);
+        try
+        {
+            if (File.Exists(source))
+            {
+                return await CopyLocalFileAsync(
+                    source,
+                    fullDestinationPath,
+                    normalizedOptions,
+                    progress,
+                    cancellationToken);
+            }
+
+            if (!Uri.TryCreate(source, UriKind.Absolute, out var sourceUri) ||
+                (sourceUri.Scheme != Uri.UriSchemeHttp && sourceUri.Scheme != Uri.UriSchemeHttps))
+            {
+                return new DownloadResult(false, null, $"Unsupported download source '{source}'.", false, false);
+            }
+
+            return await DownloadRemoteFileAsync(
+                sourceUri,
+                fullDestinationPath,
+                normalizedOptions,
+                progress,
+                cancellationToken);
+        }
+        catch (OperationCanceledException)
+        {
+            throw;
+        }
+        catch (Exception ex)
+        {
+            AppLogger.Warn(
+                "Downloader",
+                $"Download failed. Source='{source}'; Destination='{fullDestinationPath}'.",
+                ex);
+            return new DownloadResult(false, null, ex.Message, false, false);
+        }
+        finally
+        {
+            destinationGate.Release();
+        }
+    }
+
+    private async Task<DownloadResult> CopyLocalFileAsync(
+        string sourceFilePath,
+        string destinationFilePath,
+        DownloadOptions options,
+        IProgress<DownloadProgressInfo>? progress,
+        CancellationToken cancellationToken)
+    {
+        var fullSourcePath = Path.GetFullPath(sourceFilePath);
+        var fullDestinationPath = Path.GetFullPath(destinationFilePath);
+        var totalBytes = new FileInfo(fullSourcePath).Length;
+
+        var tempFilePath = BuildTempFilePath(fullDestinationPath);
+        PrepareDestination(fullDestinationPath);
+
+        if (CanReuseCompletedDestination(fullDestinationPath, totalBytes))
+        {
+            progress?.Report(new DownloadProgressInfo(totalBytes, totalBytes, 1d, false, false));
+            CleanupLocalPartialArtifacts(tempFilePath);
+            return new DownloadResult(true, fullDestinationPath, null, false, false);
+        }
+
+        long existingBytes = 0;
+        if (File.Exists(tempFilePath))
+        {
+            existingBytes = new FileInfo(tempFilePath).Length;
+            if (existingBytes > totalBytes)
+            {
+                CleanupLocalPartialArtifacts(tempFilePath);
+                existingBytes = 0;
+            }
+        }
+
+        if (!File.Exists(tempFilePath))
+        {
+            await using var tempCreateStream = new FileStream(
+                tempFilePath,
+                FileMode.Create,
+                FileAccess.Write,
+                FileShare.Read,
+                options.BufferSize,
+                FileOptions.Asynchronous | FileOptions.SequentialScan);
+        }
+
+        if (existingBytes >= totalBytes)
+        {
+            CompleteLocalCopy(tempFilePath, fullDestinationPath);
+            progress?.Report(new DownloadProgressInfo(totalBytes, totalBytes, 1d, existingBytes > 0, false));
+            return new DownloadResult(true, fullDestinationPath, null, existingBytes > 0, false);
+        }
+
+        await using var sourceStream = new FileStream(
+            fullSourcePath,
+            FileMode.Open,
+            FileAccess.Read,
+            FileShare.Read,
+            options.BufferSize,
+            FileOptions.Asynchronous | FileOptions.SequentialScan);
+        await using var destinationStream = new FileStream(
+            tempFilePath,
+            FileMode.Open,
+            FileAccess.Write,
+            FileShare.Read,
+            options.BufferSize,
+            FileOptions.Asynchronous | FileOptions.SequentialScan);
+
+        if (existingBytes > 0)
+        {
+            sourceStream.Seek(existingBytes, SeekOrigin.Begin);
+            destinationStream.Seek(existingBytes, SeekOrigin.Begin);
+        }
+
+        await CopyStreamAsync(
+            sourceStream,
+            destinationStream,
+            existingBytes,
+            totalBytes,
+            progress,
+            cancellationToken);
+
+        CompleteLocalCopy(tempFilePath, fullDestinationPath);
+        return new DownloadResult(true, fullDestinationPath, null, existingBytes > 0, false);
+    }
+
+    private async Task<DownloadResult> DownloadRemoteFileAsync(
+        Uri sourceUri,
+        string destinationFilePath,
+        DownloadOptions options,
+        IProgress<DownloadProgressInfo>? progress,
+        CancellationToken cancellationToken)
+    {
+        PrepareDestination(destinationFilePath);
+
+        if (CanReuseCompletedDestination(destinationFilePath, options.ExpectedSizeBytes))
+        {
+            var existingLength = new FileInfo(destinationFilePath).Length;
+            progress?.Report(new DownloadProgressInfo(existingLength, options.ExpectedSizeBytes, 1d, false, false));
+            CleanupDownloaderArtifacts(destinationFilePath);
+            return new DownloadResult(true, destinationFilePath, null, false, false);
+        }
+
+        var usedResume = HasDownloaderResumeArtifacts(destinationFilePath);
+        var usedParallelDownload = ShouldUseParallelDownload(options);
+        var configuration = CreateConfiguration(options, usedParallelDownload);
+        using var downloader = new DownloadService(configuration);
+
+        downloader.DownloadProgressChanged += (_, args) =>
+        {
+            progress?.Report(MapProgress(args, options.ExpectedSizeBytes, usedResume, usedParallelDownload));
+        };
+
+        using var cancellationRegistration = cancellationToken.Register(() =>
+        {
+            try
+            {
+                downloader.CancelAsync();
+            }
+            catch (Exception ex)
+            {
+                AppLogger.Warn(
+                    "Downloader",
+                    $"Failed to cancel Downloader request for '{destinationFilePath}'.",
+                    ex);
+            }
+        });
+
+        AppLogger.Info(
+            "Downloader",
+            $"Starting remote download. Source='{sourceUri}'; Destination='{destinationFilePath}'; Parallel={usedParallelDownload}; ChunkCount={configuration.ChunkCount}; Resume={usedResume}.");
+
+        await downloader.DownloadFileTaskAsync(sourceUri.AbsoluteUri, destinationFilePath);
+
+        if (!File.Exists(destinationFilePath))
+        {
+            throw new FileNotFoundException(
+                $"Downloader completed without producing '{destinationFilePath}'.",
+                destinationFilePath);
+        }
+
+        var finalLength = new FileInfo(destinationFilePath).Length;
+        progress?.Report(new DownloadProgressInfo(
+            finalLength,
+            options.ExpectedSizeBytes ?? finalLength,
+            1d,
+            usedResume,
+            usedParallelDownload));
+
+        AppLogger.Info(
+            "Downloader",
+            $"Remote download completed. Source='{sourceUri}'; Destination='{destinationFilePath}'; Size={finalLength}; Parallel={usedParallelDownload}; Resume={usedResume}.");
+
+        return new DownloadResult(true, destinationFilePath, null, usedResume, usedParallelDownload);
+    }
+
+    private static async Task CopyStreamAsync(
+        Stream sourceStream,
+        Stream destinationStream,
+        long initialDownloadedBytes,
+        long totalBytes,
+        IProgress<DownloadProgressInfo>? progress,
+        CancellationToken cancellationToken)
+    {
+        var buffer = new byte[128 * 1024];
+        var downloadedBytes = initialDownloadedBytes;
+        progress?.Report(new DownloadProgressInfo(downloadedBytes, totalBytes, downloadedBytes / (double)totalBytes, initialDownloadedBytes > 0, false));
+
+        while (true)
+        {
+            var read = await sourceStream.ReadAsync(buffer.AsMemory(0, buffer.Length), cancellationToken);
+            if (read <= 0)
+            {
+                break;
+            }
+
+            await destinationStream.WriteAsync(buffer.AsMemory(0, read), cancellationToken);
+            downloadedBytes += read;
+            progress?.Report(new DownloadProgressInfo(
+                downloadedBytes,
+                totalBytes,
+                Math.Clamp(downloadedBytes / (double)totalBytes, 0d, 1d),
+                initialDownloadedBytes > 0,
+                false));
+        }
+
+        await destinationStream.FlushAsync(cancellationToken);
+    }
+
+    private static DownloadConfiguration CreateConfiguration(DownloadOptions options, bool useParallelDownload)
+    {
+        return new DownloadConfiguration
+        {
+            BufferBlockSize = options.BufferSize,
+            ChunkCount = useParallelDownload ? options.MaxParallelSegments : 1,
+            ParallelCount = useParallelDownload ? options.MaxParallelSegments : 1,
+            ParallelDownload = useParallelDownload,
+            MinimumSizeOfChunking = options.ParallelThresholdBytes,
+            MaxTryAgainOnFailure = 3,
+            ResumeDownloadIfCan = true,
+            ClearPackageOnCompletionWithFailure = false,
+            FileExistPolicy = FileExistPolicy.Delete,
+            DownloadFileExtension = ".part"
+        };
+    }
+
+    private static DownloadProgressInfo MapProgress(
+        DownloadProgressChangedEventArgs args,
+        long? expectedSizeBytes,
+        bool isResuming,
+        bool isParallel)
+    {
+        var totalBytes = args.TotalBytesToReceive > 0
+            ? args.TotalBytesToReceive
+            : expectedSizeBytes;
+        var downloadedBytes = Math.Max(0L, args.ReceivedBytesSize);
+        var normalizedProgress = args.ProgressPercentage > 1d
+            ? args.ProgressPercentage / 100d
+            : args.ProgressPercentage;
+
+        if (totalBytes is > 0 && normalizedProgress <= 0d)
+        {
+            normalizedProgress = downloadedBytes / (double)totalBytes.Value;
+        }
+
+        return new DownloadProgressInfo(
+            downloadedBytes,
+            totalBytes,
+            Math.Clamp(normalizedProgress, 0d, 1d),
+            isResuming,
+            isParallel);
+    }
+
+    private static bool CanReuseCompletedDestination(string destinationFilePath, long? expectedSizeBytes)
+    {
+        if (!File.Exists(destinationFilePath))
+        {
+            return false;
+        }
+
+        if (expectedSizeBytes is not > 0)
+        {
+            return false;
+        }
+
+        return new FileInfo(destinationFilePath).Length == expectedSizeBytes.Value;
+    }
+
+    private static void PrepareDestination(string destinationFilePath)
+    {
+        var directory = Path.GetDirectoryName(destinationFilePath);
+        if (!string.IsNullOrWhiteSpace(directory))
+        {
+            Directory.CreateDirectory(directory);
+        }
+    }
+
+    private static void CleanupLocalPartialArtifacts(string tempFilePath)
+    {
+        if (File.Exists(tempFilePath))
+        {
+            FileOperationRetryHelper.DeleteFileWithRetry(tempFilePath, "Downloader");
+        }
+    }
+
+    private static void CompleteLocalCopy(string tempFilePath, string destinationFilePath)
+    {
+        if (!File.Exists(tempFilePath))
+        {
+            return;
+        }
+
+        FileOperationRetryHelper.MoveWithOverwriteRetry(tempFilePath, destinationFilePath, "Downloader");
+    }
+
+    private static void CleanupDownloaderArtifacts(string destinationFilePath)
+    {
+        var transientFilePath = BuildTempFilePath(destinationFilePath);
+        var metadataFilePath = BuildPackageFilePath(destinationFilePath);
+
+        if (File.Exists(transientFilePath))
+        {
+            FileOperationRetryHelper.DeleteFileWithRetry(transientFilePath, "Downloader");
+        }
+
+        if (File.Exists(metadataFilePath))
+        {
+            FileOperationRetryHelper.DeleteFileWithRetry(metadataFilePath, "Downloader");
+        }
+    }
+
+    private static bool HasDownloaderResumeArtifacts(string destinationFilePath)
+    {
+        return File.Exists(BuildTempFilePath(destinationFilePath)) ||
+               File.Exists(BuildPackageFilePath(destinationFilePath));
+    }
+
+    private static bool ShouldUseParallelDownload(DownloadOptions options)
+    {
+        return options.MaxParallelSegments > 1;
+    }
+
+    private static DownloadOptions NormalizeOptions(DownloadOptions? options)
+    {
+        var normalized = options ?? new DownloadOptions();
+        return normalized with
+        {
+            MaxParallelSegments = Math.Clamp(normalized.MaxParallelSegments, 1, 8),
+            ParallelThresholdBytes = Math.Max(1_048_576, normalized.ParallelThresholdBytes),
+            BufferSize = Math.Max(16 * 1024, normalized.BufferSize)
+        };
+    }
+
+    private static string BuildTempFilePath(string destinationFilePath) => destinationFilePath + ".part";
+
+    private static string BuildPackageFilePath(string destinationFilePath) => destinationFilePath + ".download";
+}

LanMountainDesktop/Services/StartupDiagnosticsService.cs

@@ -0,0 +1,193 @@
+using System;
+using System.Collections.Generic;
+using System.Diagnostics;
+using System.IO;
+using System.Linq;
+using System.Reflection;
+
+namespace LanMountainDesktop.Services;
+
+public sealed class StartupDiagnosticsResult
+{
+    public string ExecutablePath { get; init; } = string.Empty;
+
+    public string BaseDirectory { get; init; } = string.Empty;
+
+    public string ExecutableName { get; init; } = string.Empty;
+
+    public bool IsLegacyExecutableLaunch { get; init; }
+
+    public IReadOnlyList<string> FoundLegacyArtifacts { get; init; } = Array.Empty<string>();
+
+    public IReadOnlyList<string> DeletedLegacyArtifacts { get; init; } = Array.Empty<string>();
+
+    public IReadOnlyList<string> FailedLegacyArtifacts { get; init; } = Array.Empty<string>();
+}
+
+public static class StartupDiagnosticsService
+{
+    private const string CurrentExecutableName = "LanMountainDesktop.exe";
+
+    private static readonly string[] LegacyArtifactNames =
+    [
+        "LanMontainDesktop.exe",
+        "LanMontainDesktop.dll",
+        "LanMontainDesktop.deps.json",
+        "LanMontainDesktop.runtimeconfig.json",
+        "LanMontainDesktop.pdb",
+        "LanMontainDesktop.exe.WebView2"
+    ];
+
+    public static StartupDiagnosticsResult Run(string[] args)
+    {
+        var executablePath = ResolveExecutablePath();
+        var baseDirectory = AppContext.BaseDirectory;
+        var executableName = Path.GetFileName(executablePath);
+        var assemblyVersion = Assembly.GetEntryAssembly()?.GetName().Version?.ToString() ?? "unknown";
+        var fileVersion = string.Empty;
+
+        try
+        {
+            if (!string.IsNullOrWhiteSpace(executablePath) && File.Exists(executablePath))
+            {
+                fileVersion = FileVersionInfo.GetVersionInfo(executablePath).FileVersion ?? string.Empty;
+            }
+        }
+        catch
+        {
+            // Keep diagnostics best-effort.
+        }
+
+        AppLogger.Info(
+            "Startup",
+            $"Application starting. ExecutablePath={executablePath}; BaseDirectory={baseDirectory}; ExecutableName={executableName}; AssemblyVersion={assemblyVersion}; FileVersion={fileVersion}; Args=[{string.Join(", ", args)}]");
+
+        var foundLegacyArtifacts = LegacyArtifactNames
+            .Select(name => Path.Combine(baseDirectory, name))
+            .Where(path => File.Exists(path) || Directory.Exists(path))
+            .OrderBy(path => path, StringComparer.OrdinalIgnoreCase)
+            .ToList();
+
+        var deletedLegacyArtifacts = new List<string>();
+        var failedLegacyArtifacts = new List<string>();
+        foreach (var legacyArtifact in foundLegacyArtifacts)
+        {
+            if (string.Equals(legacyArtifact, executablePath, StringComparison.OrdinalIgnoreCase))
+            {
+                continue;
+            }
+
+            if (TryDeleteLegacyArtifact(legacyArtifact, out var error))
+            {
+                deletedLegacyArtifacts.Add(legacyArtifact);
+            }
+            else if (!string.IsNullOrWhiteSpace(error))
+            {
+                failedLegacyArtifacts.Add($"{legacyArtifact} ({error})");
+            }
+        }
+
+        if (foundLegacyArtifacts.Count > 0)
+        {
+            AppLogger.Warn(
+                "StartupDiagnostics",
+                $"Found legacy artifacts: {string.Join("; ", foundLegacyArtifacts)}");
+        }
+
+        if (deletedLegacyArtifacts.Count > 0)
+        {
+            AppLogger.Info(
+                "StartupDiagnostics",
+                $"Deleted legacy artifacts: {string.Join("; ", deletedLegacyArtifacts)}");
+        }
+
+        if (failedLegacyArtifacts.Count > 0)
+        {
+            AppLogger.Warn(
+                "StartupDiagnostics",
+                $"Failed to delete legacy artifacts: {string.Join("; ", failedLegacyArtifacts)}");
+        }
+
+        var isLegacyExecutableLaunch = string.Equals(
+            executableName,
+            "LanMontainDesktop.exe",
+            StringComparison.OrdinalIgnoreCase);
+
+        if (isLegacyExecutableLaunch)
+        {
+            AppLogger.Warn(
+                "StartupDiagnostics",
+                $"Legacy executable launch detected. Current executable should be '{CurrentExecutableName}', but actual executable is '{executableName}'.");
+        }
+
+        return new StartupDiagnosticsResult
+        {
+            ExecutablePath = executablePath,
+            BaseDirectory = baseDirectory,
+            ExecutableName = executableName,
+            IsLegacyExecutableLaunch = isLegacyExecutableLaunch,
+            FoundLegacyArtifacts = foundLegacyArtifacts,
+            DeletedLegacyArtifacts = deletedLegacyArtifacts,
+            FailedLegacyArtifacts = failedLegacyArtifacts
+        };
+    }
+
+    public static void ShowLegacyExecutableWarningIfNeeded(StartupDiagnosticsResult diagnostics)
+    {
+        if (!diagnostics.IsLegacyExecutableLaunch)
+        {
+            return;
+        }
+
+        var message =
+            "检测到当前是从旧残留可执行文件启动的。\r\n\r\n" +
+            $"当前文件: {diagnostics.ExecutableName}\r\n" +
+            $"当前路径: {diagnostics.ExecutablePath}\r\n\r\n" +
+            $"请改用 {CurrentExecutableName} 启动，以免继续读取旧残留文件。\r\n" +
+            $"日志目录: {AppLogger.LogDirectory}";
+
+        WindowsNativeDialogService.ShowWarning("LanMountainDesktop 启动诊断", message);
+    }
+
+    private static string ResolveExecutablePath()
+    {
+        try
+        {
+            return Environment.ProcessPath ??
+                   Process.GetCurrentProcess().MainModule?.FileName ??
+                   string.Empty;
+        }
+        catch
+        {
+            return string.Empty;
+        }
+    }
+
+    private static bool TryDeleteLegacyArtifact(string path, out string? error)
+    {
+        try
+        {
+            if (File.Exists(path))
+            {
+                File.Delete(path);
+                error = null;
+                return true;
+            }
+
+            if (Directory.Exists(path))
+            {
+                Directory.Delete(path, recursive: true);
+                error = null;
+                return true;
+            }
+
+            error = null;
+            return false;
+        }
+        catch (Exception ex)
+        {
+            error = ex.Message;
+            return false;
+        }
+    }
+}

LanMountainDesktop/Services/WindowsNativeDialogService.cs

@@ -0,0 +1,30 @@
+using System;
+using System.Runtime.InteropServices;
+
+namespace LanMountainDesktop.Services;
+
+internal static class WindowsNativeDialogService
+{
+    private const uint Ok = 0x00000000;
+    private const uint IconWarning = 0x00000030;
+
+    public static void ShowWarning(string caption, string message)
+    {
+        if (!OperatingSystem.IsWindows())
+        {
+            return;
+        }
+
+        try
+        {
+            _ = MessageBoxW(IntPtr.Zero, message, caption, Ok | IconWarning);
+        }
+        catch (Exception ex)
+        {
+            AppLogger.Warn("StartupDiagnostics", "Failed to show legacy executable warning dialog.", ex);
+        }
+    }
+
+    [DllImport("user32.dll", EntryPoint = "MessageBoxW", CharSet = CharSet.Unicode, SetLastError = true)]
+    private static extern int MessageBoxW(IntPtr hWnd, string text, string caption, uint type);
+}

LanMountainDesktop/Services/WindowsStartupService.cs

@@ -30,8 +30,9 @@ public sealed class WindowsStartupService
             return runKey?.GetValue(ValueName) is string value &&
                    !string.IsNullOrWhiteSpace(value);
         }
-        catch
+        catch (Exception ex)
         {
+            AppLogger.Warn("WindowsStartup", "Failed to query startup registry state.", ex);
             return false;
         }
     }
@@ -67,8 +68,9 @@ public sealed class WindowsStartupService
 
             return IsEnabled() == enabled;
         }
-        catch
+        catch (Exception ex)
         {
+            AppLogger.Warn("WindowsStartup", $"Failed to set startup registry state. Enabled={enabled}", ex);
             return false;
         }
     }

LanMountainDesktop/Views/Components/AnalogClockWidget.axaml.cs

@@ -7,11 +7,12 @@ using Avalonia.Controls.Shapes;
 using Avalonia.Media;
 using Avalonia.Styling;
 using Avalonia.Threading;
+using LanMountainDesktop.ComponentSystem;
 using LanMountainDesktop.Services;
 
 namespace LanMountainDesktop.Views.Components;
 
-public partial class AnalogClockWidget : UserControl, IDesktopComponentWidget, ITimeZoneAwareComponentWidget
+public partial class AnalogClockWidget : UserControl, IDesktopComponentWidget, ITimeZoneAwareComponentWidget, IComponentPlacementContextAware, IComponentSettingsStoreAware
 {
     private static readonly IReadOnlyDictionary<string, string> ZhCityNames =
         new Dictionary<string, string>(StringComparer.OrdinalIgnoreCase)
@@ -54,9 +55,11 @@ public partial class AnalogClockWidget : UserControl, IDesktopComponentWidget, I
 
     private const double DialSize = 258;
     private const double Center = DialSize / 2;
+    private string _componentId = BuiltInComponentIds.DesktopClock;
+    private string _placementId = string.Empty;
 
     private readonly AppSettingsService _appSettingsService = new();
-    private readonly ComponentSettingsService _componentSettingsService = new();
+    private IComponentInstanceSettingsStore _componentSettingsStore = new ComponentSettingsService();
     private readonly LocalizationService _localizationService = new();
     private TimeZoneService? _timeZoneService;
     private double _currentCellSize = 48;
@@ -112,6 +115,21 @@ public partial class AnalogClockWidget : UserControl, IDesktopComponentWidget, I
         UpdateClock();
     }
 
+    public void SetComponentPlacementContext(string componentId, string? placementId)
+    {
+        _componentId = string.IsNullOrWhiteSpace(componentId)
+            ? BuiltInComponentIds.DesktopClock
+            : componentId.Trim();
+        _placementId = placementId?.Trim() ?? string.Empty;
+        RefreshFromSettings();
+    }
+
+    public void SetComponentSettingsStore(IComponentInstanceSettingsStore settingsStore)
+    {
+        _componentSettingsStore = settingsStore ?? new ComponentSettingsService();
+        RefreshFromSettings();
+    }
+
     private void OnAttachedToVisualTree(object? sender, VisualTreeAttachmentEventArgs e)
     {
         InitializeDialIfNeeded();
@@ -359,7 +377,7 @@ public partial class AnalogClockWidget : UserControl, IDesktopComponentWidget, I
     private void LoadClockSettings()
     {
         var appSnapshot = _appSettingsService.Load();
-        var componentSnapshot = _componentSettingsService.Load();
+        var componentSnapshot = _componentSettingsStore.LoadForComponent(_componentId, _placementId);
         _languageCode = _localizationService.NormalizeLanguageCode(appSnapshot.LanguageCode);
 
         var configuredTimeZoneId = string.IsNullOrWhiteSpace(componentSnapshot.DesktopClockTimeZoneId)

LanMountainDesktop/Views/Components/AnalogClockWidgetSettingsWindow.axaml.cs

@@ -4,11 +4,12 @@ using System.Linq;
 using Avalonia.Controls;
 using Avalonia.Controls.Primitives;
 using Avalonia.Interactivity;
+using LanMountainDesktop.ComponentSystem;
 using LanMountainDesktop.Services;
 
 namespace LanMountainDesktop.Views.Components;
 
-public partial class AnalogClockWidgetSettingsWindow : UserControl
+public partial class AnalogClockWidgetSettingsWindow : UserControl, IComponentPlacementContextAware, IComponentSettingsStoreAware
 {
     private static readonly IReadOnlyDictionary<string, string> ZhTimeZoneNames =
         new Dictionary<string, string>(StringComparer.OrdinalIgnoreCase)
@@ -28,11 +29,13 @@ public partial class AnalogClockWidgetSettingsWindow : UserControl
         };
 
     private readonly AppSettingsService _appSettingsService = new();
-    private readonly ComponentSettingsService _componentSettingsService = new();
+    private IComponentInstanceSettingsStore _componentSettingsStore = new ComponentSettingsService();
     private readonly LocalizationService _localizationService = new();
     private readonly TimeZoneService _timeZoneService = new();
     private bool _suppressEvents;
     private string _languageCode = "zh-CN";
+    private string _componentId = BuiltInComponentIds.DesktopClock;
+    private string _placementId = string.Empty;
     private IReadOnlyList<TimeZoneInfo> _allTimeZones = Array.Empty<TimeZoneInfo>();
     private string _selectedTimeZoneId = string.Empty;
     private string _secondHandMode = ClockSecondHandMode.Tick;
@@ -47,10 +50,29 @@ public partial class AnalogClockWidgetSettingsWindow : UserControl
         PopulateTimeZoneComboBox();
     }
 
+    public void SetComponentPlacementContext(string componentId, string? placementId)
+    {
+        _componentId = string.IsNullOrWhiteSpace(componentId)
+            ? BuiltInComponentIds.DesktopClock
+            : componentId.Trim();
+        _placementId = placementId?.Trim() ?? string.Empty;
+        LoadState();
+        ApplyLocalization();
+        PopulateTimeZoneComboBox();
+    }
+
+    public void SetComponentSettingsStore(IComponentInstanceSettingsStore settingsStore)
+    {
+        _componentSettingsStore = settingsStore ?? new ComponentSettingsService();
+        LoadState();
+        ApplyLocalization();
+        PopulateTimeZoneComboBox();
+    }
+
     private void LoadState()
     {
         var appSnapshot = _appSettingsService.Load();
-        var componentSnapshot = _componentSettingsService.Load();
+        var componentSnapshot = _componentSettingsStore.LoadForComponent(_componentId, _placementId);
         _languageCode = _localizationService.NormalizeLanguageCode(appSnapshot.LanguageCode);
         _selectedTimeZoneId = string.IsNullOrWhiteSpace(componentSnapshot.DesktopClockTimeZoneId)
             ? "China Standard Time"
@@ -149,10 +171,10 @@ public partial class AnalogClockWidgetSettingsWindow : UserControl
         _selectedTimeZoneId = normalizedId;
         _secondHandMode = GetSelectedSecondHandMode();
 
-        var snapshot = _componentSettingsService.Load();
+        var snapshot = _componentSettingsStore.LoadForComponent(_componentId, _placementId);
         snapshot.DesktopClockTimeZoneId = normalizedId;
         snapshot.DesktopClockSecondHandMode = _secondHandMode;
-        _componentSettingsService.Save(snapshot);
+        _componentSettingsStore.SaveForComponent(_componentId, _placementId, snapshot);
 
         SettingsChanged?.Invoke(this, EventArgs.Empty);
     }

LanMountainDesktop/Views/Components/ClassScheduleSettingsWindow.axaml.cs

@@ -10,19 +10,22 @@ using Avalonia.Interactivity;
 using Avalonia.Layout;
 using Avalonia.Media;
 using Avalonia.Platform.Storage;
+using LanMountainDesktop.ComponentSystem;
 using LanMountainDesktop.Models;
 using LanMountainDesktop.Services;
 
 namespace LanMountainDesktop.Views.Components;
 
-public partial class ClassScheduleSettingsWindow : UserControl
+public partial class ClassScheduleSettingsWindow : UserControl, IComponentPlacementContextAware, IComponentSettingsStoreAware
 {
     private readonly AppSettingsService _appSettingsService = new();
-    private readonly ComponentSettingsService _componentSettingsService = new();
+    private IComponentInstanceSettingsStore _componentSettingsStore = new ComponentSettingsService();
     private readonly LocalizationService _localizationService = new();
     private readonly List<ImportedClassScheduleSnapshot> _importedSchedules = [];
     private string _activeScheduleId = string.Empty;
     private string _languageCode = "zh-CN";
+    private string _componentId = BuiltInComponentIds.DesktopClassSchedule;
+    private string _placementId = string.Empty;
 
     public event EventHandler? SettingsChanged;
 
@@ -34,10 +37,29 @@ public partial class ClassScheduleSettingsWindow : UserControl
         RenderImportedSchedules();
     }
 
+    public void SetComponentPlacementContext(string componentId, string? placementId)
+    {
+        _componentId = string.IsNullOrWhiteSpace(componentId)
+            ? BuiltInComponentIds.DesktopClassSchedule
+            : componentId.Trim();
+        _placementId = placementId?.Trim() ?? string.Empty;
+        LoadState();
+        ApplyLocalization();
+        RenderImportedSchedules();
+    }
+
+    public void SetComponentSettingsStore(IComponentInstanceSettingsStore settingsStore)
+    {
+        _componentSettingsStore = settingsStore ?? new ComponentSettingsService();
+        LoadState();
+        ApplyLocalization();
+        RenderImportedSchedules();
+    }
+
     private void LoadState()
     {
         var appSnapshot = _appSettingsService.Load();
-        var componentSnapshot = _componentSettingsService.Load();
+        var componentSnapshot = _componentSettingsStore.LoadForComponent(_componentId, _placementId);
         _languageCode = _localizationService.NormalizeLanguageCode(appSnapshot.LanguageCode);
 
         _importedSchedules.Clear();
@@ -299,7 +321,7 @@ public partial class ClassScheduleSettingsWindow : UserControl
 
     private void SaveState()
     {
-        var snapshot = _componentSettingsService.Load();
+        var snapshot = _componentSettingsStore.LoadForComponent(_componentId, _placementId);
         snapshot.ImportedClassSchedules = _importedSchedules
             .Select(item => new ImportedClassScheduleSnapshot
             {
@@ -309,7 +331,7 @@ public partial class ClassScheduleSettingsWindow : UserControl
             })
             .ToList();
         snapshot.ActiveImportedClassScheduleId = _activeScheduleId ?? string.Empty;
-        _componentSettingsService.Save(snapshot);
+        _componentSettingsStore.SaveForComponent(_componentId, _placementId, snapshot);
         SettingsChanged?.Invoke(this, EventArgs.Empty);
     }
 

LanMountainDesktop/Views/Components/ClassScheduleWidget.axaml.cs

@@ -7,12 +7,13 @@ using Avalonia.Controls;
 using Avalonia.Media;
 using Avalonia.Styling;
 using Avalonia.Threading;
+using LanMountainDesktop.ComponentSystem;
 using LanMountainDesktop.Models;
 using LanMountainDesktop.Services;
 
 namespace LanMountainDesktop.Views.Components;
 
-public partial class ClassScheduleWidget : UserControl, IDesktopComponentWidget, ITimeZoneAwareComponentWidget
+public partial class ClassScheduleWidget : UserControl, IDesktopComponentWidget, ITimeZoneAwareComponentWidget, IComponentPlacementContextAware, IComponentSettingsStoreAware
 {
     private sealed record CourseItemViewModel(
         string Name,
@@ -26,7 +27,7 @@ public partial class ClassScheduleWidget : UserControl, IDesktopComponentWidget,
     };
 
     private readonly AppSettingsService _appSettingsService = new();
-    private readonly ComponentSettingsService _componentSettingsService = new();
+    private IComponentInstanceSettingsStore _componentSettingsStore = new ComponentSettingsService();
     private readonly LocalizationService _localizationService = new();
     private readonly IClassIslandScheduleDataService _scheduleService = new ClassIslandScheduleDataService();
 
@@ -35,6 +36,8 @@ public partial class ClassScheduleWidget : UserControl, IDesktopComponentWidget,
     private IReadOnlyList<CourseItemViewModel> _courseItems = Array.Empty<CourseItemViewModel>();
     private bool _isNightVisual = true;
     private string _languageCode = "zh-CN";
+    private string _componentId = BuiltInComponentIds.DesktopClassSchedule;
+    private string _placementId = string.Empty;
 
     public ClassScheduleWidget()
     {
@@ -113,10 +116,25 @@ public partial class ClassScheduleWidget : UserControl, IDesktopComponentWidget,
         RefreshSchedule();
     }
 
+    public void SetComponentPlacementContext(string componentId, string? placementId)
+    {
+        _componentId = string.IsNullOrWhiteSpace(componentId)
+            ? BuiltInComponentIds.DesktopClassSchedule
+            : componentId.Trim();
+        _placementId = placementId?.Trim() ?? string.Empty;
+        RefreshSchedule();
+    }
+
+    public void SetComponentSettingsStore(IComponentInstanceSettingsStore settingsStore)
+    {
+        _componentSettingsStore = settingsStore ?? new ComponentSettingsService();
+        RefreshSchedule();
+    }
+
     private void RefreshSchedule()
     {
         var appSettings = _appSettingsService.Load();
-        var componentSettings = _componentSettingsService.Load();
+        var componentSettings = _componentSettingsStore.LoadForComponent(_componentId, _placementId);
         _languageCode = _localizationService.NormalizeLanguageCode(appSettings.LanguageCode);
         var now = _timeZoneService?.GetCurrentTime() ?? DateTime.Now;
         UpdateHeader(now);

LanMountainDesktop/Views/Components/DailyArtworkSettingsWindow.axaml.cs

@@ -2,18 +2,21 @@ using System;
 using Avalonia.Controls;
 using Avalonia.Controls.Primitives;
 using Avalonia.Interactivity;
+using LanMountainDesktop.ComponentSystem;
 using LanMountainDesktop.Models;
 using LanMountainDesktop.Services;
 
 namespace LanMountainDesktop.Views.Components;
 
-public partial class DailyArtworkSettingsWindow : UserControl
+public partial class DailyArtworkSettingsWindow : UserControl, IComponentPlacementContextAware, IComponentSettingsStoreAware
 {
     private readonly AppSettingsService _appSettingsService = new();
-    private readonly ComponentSettingsService _componentSettingsService = new();
+    private IComponentInstanceSettingsStore _componentSettingsStore = new ComponentSettingsService();
     private readonly LocalizationService _localizationService = new();
     private string _languageCode = "zh-CN";
     private bool _suppressEvents;
+    private string _componentId = BuiltInComponentIds.DesktopDailyArtwork;
+    private string _placementId = string.Empty;
 
     public event EventHandler? SettingsChanged;
 
@@ -24,10 +27,27 @@ public partial class DailyArtworkSettingsWindow : UserControl
         ApplyLocalization();
     }
 
+    public void SetComponentPlacementContext(string componentId, string? placementId)
+    {
+        _componentId = string.IsNullOrWhiteSpace(componentId)
+            ? BuiltInComponentIds.DesktopDailyArtwork
+            : componentId.Trim();
+        _placementId = placementId?.Trim() ?? string.Empty;
+        LoadState();
+        ApplyLocalization();
+    }
+
+    public void SetComponentSettingsStore(IComponentInstanceSettingsStore settingsStore)
+    {
+        _componentSettingsStore = settingsStore ?? new ComponentSettingsService();
+        LoadState();
+        ApplyLocalization();
+    }
+
     private void LoadState()
     {
         var appSnapshot = _appSettingsService.Load();
-        var componentSnapshot = _componentSettingsService.Load();
+        var componentSnapshot = _componentSettingsStore.LoadForComponent(_componentId, _placementId);
         _languageCode = _localizationService.NormalizeLanguageCode(appSnapshot.LanguageCode);
 
         var source = DailyArtworkMirrorSources.Normalize(componentSnapshot.DailyArtworkMirrorSource);
@@ -59,9 +79,9 @@ public partial class DailyArtworkSettingsWindow : UserControl
         }
 
         var source = GetSelectedSource();
-        var snapshot = _componentSettingsService.Load();
+        var snapshot = _componentSettingsStore.LoadForComponent(_componentId, _placementId);
         snapshot.DailyArtworkMirrorSource = source;
-        _componentSettingsService.Save(snapshot);
+        _componentSettingsStore.SaveForComponent(_componentId, _placementId, snapshot);
 
         UpdateSourceStatus(source);
         SettingsChanged?.Invoke(this, EventArgs.Empty);

LanMountainDesktop/Views/Components/DailyArtworkWidget.axaml.cs

@@ -13,12 +13,13 @@ using Avalonia.Input;
 using Avalonia.Media;
 using Avalonia.Media.Imaging;
 using Avalonia.Threading;
+using LanMountainDesktop.ComponentSystem;
 using LanMountainDesktop.Models;
 using LanMountainDesktop.Services;
 
 namespace LanMountainDesktop.Views.Components;
 
-public partial class DailyArtworkWidget : UserControl, IDesktopComponentWidget, IRecommendationInfoAwareComponentWidget
+public partial class DailyArtworkWidget : UserControl, IDesktopComponentWidget, IRecommendationInfoAwareComponentWidget, IComponentPlacementContextAware, IComponentSettingsStoreAware
 {
     private static readonly IReadOnlyDictionary<DayOfWeek, string> ZhWeekdays =
         new Dictionary<DayOfWeek, string>
@@ -58,6 +59,7 @@ public partial class DailyArtworkWidget : UserControl, IDesktopComponentWidget,
     };
 
     private readonly AppSettingsService _settingsService = new();
+    private IComponentInstanceSettingsStore _componentSettingsStore = new ComponentSettingsService();
     private readonly LocalizationService _localizationService = new();
 
     private IRecommendationInfoService _recommendationService = DefaultRecommendationService;
@@ -67,6 +69,8 @@ public partial class DailyArtworkWidget : UserControl, IDesktopComponentWidget,
     private double _currentCellSize = BaseCellSize;
     private bool _isAttached;
     private bool _isRefreshing;
+    private string _componentId = BuiltInComponentIds.DesktopDailyArtwork;
+    private string _placementId = string.Empty;
     private string? _currentArtworkSourceUrl;
     private string? _currentArtworkImageUrl;
 
@@ -136,6 +140,21 @@ public partial class DailyArtworkWidget : UserControl, IDesktopComponentWidget,
         }
     }
 
+    public void SetComponentPlacementContext(string componentId, string? placementId)
+    {
+        _componentId = string.IsNullOrWhiteSpace(componentId)
+            ? BuiltInComponentIds.DesktopDailyArtwork
+            : componentId.Trim();
+        _placementId = placementId?.Trim() ?? string.Empty;
+        RefreshFromSettings();
+    }
+
+    public void SetComponentSettingsStore(IComponentInstanceSettingsStore settingsStore)
+    {
+        _componentSettingsStore = settingsStore ?? new ComponentSettingsService();
+        RefreshFromSettings();
+    }
+
     private void OnAttachedToVisualTree(object? sender, VisualTreeAttachmentEventArgs e)
     {
         _isAttached = true;
@@ -203,6 +222,7 @@ public partial class DailyArtworkWidget : UserControl, IDesktopComponentWidget,
         {
             var query = new DailyArtworkQuery(
                 Locale: _languageCode,
+                MirrorSource: ResolveMirrorSource(),
                 ForceRefresh: forceRefresh);
             var result = await _recommendationService.GetDailyArtworkAsync(query, cts.Token);
             if (!_isAttached || cts.IsCancellationRequested)
@@ -640,6 +660,19 @@ public partial class DailyArtworkWidget : UserControl, IDesktopComponentWidget,
         }
     }
 
+    private string ResolveMirrorSource()
+    {
+        try
+        {
+            var snapshot = _componentSettingsStore.LoadForComponent(_componentId, _placementId);
+            return DailyArtworkMirrorSources.Normalize(snapshot.DailyArtworkMirrorSource);
+        }
+        catch
+        {
+            return DailyArtworkMirrorSources.Overseas;
+        }
+    }
+
     private void UpdateDateLabels()
     {
         var now = DateTime.Now;

LanMountainDesktop/Views/Components/DesktopComponentRuntimeRegistry.cs

@@ -7,24 +7,65 @@ using LanMountainDesktop.Services;
 
 namespace LanMountainDesktop.Views.Components;
 
-public sealed record DesktopComponentRuntimeRegistration(
-    string ComponentId,
-    string DisplayNameLocalizationKey,
-    Func<Control> ControlFactory,
-    Func<double, double>? CornerRadiusResolver = null);
+public sealed record DesktopComponentControlFactoryContext(
+    DesktopComponentDefinition Definition,
+    double CellSize,
+    TimeZoneService TimeZoneService,
+    IWeatherInfoService WeatherInfoService,
+    IRecommendationInfoService RecommendationInfoService,
+    ICalculatorDataService CalculatorDataService,
+    IComponentInstanceSettingsStore ComponentSettingsStore,
+    string? PlacementId = null);
+
+public sealed class DesktopComponentRuntimeRegistration
+{
+    public DesktopComponentRuntimeRegistration(
+        string componentId,
+        string? displayNameLocalizationKey,
+        Func<Control> controlFactory,
+        Func<double, double>? cornerRadiusResolver = null)
+        : this(componentId, displayNameLocalizationKey, _ => controlFactory(), cornerRadiusResolver)
+    {
+    }
+
+    public DesktopComponentRuntimeRegistration(
+        string componentId,
+        string? displayNameLocalizationKey,
+        Func<DesktopComponentControlFactoryContext, Control> controlFactory,
+        Func<double, double>? cornerRadiusResolver = null)
+    {
+        ArgumentException.ThrowIfNullOrWhiteSpace(componentId);
+        ArgumentNullException.ThrowIfNull(controlFactory);
+
+        ComponentId = componentId.Trim();
+        DisplayNameLocalizationKey = string.IsNullOrWhiteSpace(displayNameLocalizationKey)
+            ? null
+            : displayNameLocalizationKey.Trim();
+        ControlFactory = controlFactory;
+        CornerRadiusResolver = cornerRadiusResolver;
+    }
+
+    public string ComponentId { get; }
+
+    public string? DisplayNameLocalizationKey { get; }
+
+    public Func<DesktopComponentControlFactoryContext, Control> ControlFactory { get; }
+
+    public Func<double, double>? CornerRadiusResolver { get; }
+}
 
 public sealed class DesktopComponentRuntimeDescriptor
 {
     private static readonly Func<double, double> DefaultCornerRadiusResolver =
         cellSize => Math.Clamp(cellSize * 0.22, 8, 18);
 
-    private readonly Func<Control> _controlFactory;
+    private readonly Func<DesktopComponentControlFactoryContext, Control> _controlFactory;
     private readonly Func<double, double> _cornerRadiusResolver;
 
     internal DesktopComponentRuntimeDescriptor(
         DesktopComponentDefinition definition,
-        string displayNameLocalizationKey,
-        Func<Control> controlFactory,
+        string? displayNameLocalizationKey,
+        Func<DesktopComponentControlFactoryContext, Control> controlFactory,
         Func<double, double>? cornerRadiusResolver)
     {
         Definition = definition;
@@ -35,16 +76,48 @@ public sealed class DesktopComponentRuntimeDescriptor
 
     public DesktopComponentDefinition Definition { get; }
 
-    public string DisplayNameLocalizationKey { get; }
+    public string? DisplayNameLocalizationKey { get; }
 
     public Control CreateControl(
         double cellSize,
         TimeZoneService timeZoneService,
         IWeatherInfoService weatherInfoService,
         IRecommendationInfoService recommendationInfoService,
-        ICalculatorDataService calculatorDataService)
+        ICalculatorDataService calculatorDataService,
+        IComponentInstanceSettingsStore componentSettingsStore,
+        string? placementId = null)
     {
-        var control = _controlFactory();
+        var control = _controlFactory(new DesktopComponentControlFactoryContext(
+            Definition,
+            cellSize,
+            timeZoneService,
+            weatherInfoService,
+            recommendationInfoService,
+            calculatorDataService,
+            componentSettingsStore,
+            placementId));
+        var runtimeContext = new DesktopComponentRuntimeContext(
+            Definition.Id,
+            placementId,
+            componentSettingsStore);
+
+        if (control is IComponentRuntimeContextAware runtimeContextAwareComponent)
+        {
+            runtimeContextAwareComponent.SetComponentRuntimeContext(runtimeContext);
+        }
+
+        if (control is IComponentPlacementContextAware placementAwareComponent)
+        {
+            placementAwareComponent.SetComponentPlacementContext(Definition.Id, placementId);
+        }
+
+        if (control is IComponentSettingsStoreAware settingsStoreAwareComponent)
+        {
+            settingsStoreAwareComponent.SetComponentSettingsStore(componentSettingsStore);
+        }
+
+        ComponentSettingsService.ApplyScopedContextToTarget(control, Definition.Id, placementId);
+
         if (control is IDesktopComponentWidget sizedComponent)
         {
             sizedComponent.ApplyCellSize(cellSize);
@@ -109,12 +182,10 @@ public sealed class DesktopComponentRuntimeRegistry
                 StringComparer.OrdinalIgnoreCase);
     }
 
-    public static DesktopComponentRuntimeRegistry CreateDefault(ComponentRegistry componentRegistry)
+    public static IReadOnlyList<DesktopComponentRuntimeRegistration> GetDefaultRegistrations()
     {
-        return new DesktopComponentRuntimeRegistry(
-            componentRegistry,
-            new[]
-            {
+        return
+        [
                 new DesktopComponentRuntimeRegistration(
                     BuiltInComponentIds.Date,
                     "component.date",
@@ -295,7 +366,12 @@ public sealed class DesktopComponentRuntimeRegistry
                     "component.holiday_calendar",
                     () => new HolidayCalendarWidget(),
                     cellSize => Math.Clamp(cellSize * 0.32, 12, 28))
-            });
+        ];
+    }
+
+    public static DesktopComponentRuntimeRegistry CreateDefault(ComponentRegistry componentRegistry)
+    {
+        return new DesktopComponentRuntimeRegistry(componentRegistry, GetDefaultRegistrations());
     }
 
     public bool TryGetDescriptor(string componentId, out DesktopComponentRuntimeDescriptor descriptor)

LanMountainDesktop/Views/Components/ExtendedWeatherWidget.axaml.cs

@@ -9,13 +9,14 @@ using Avalonia;
 using Avalonia.Controls;
 using Avalonia.Media;
 using Avalonia.Threading;
+using LanMountainDesktop.ComponentSystem;
 using LanMountainDesktop.Models;
 using LanMountainDesktop.Services;
 using LanMountainDesktop.Theme;
 
 namespace LanMountainDesktop.Views.Components;
 
-public partial class ExtendedWeatherWidget : UserControl, IDesktopComponentWidget, IDesktopPageVisibilityAwareComponentWidget, ITimeZoneAwareComponentWidget, IWeatherInfoAwareComponentWidget
+public partial class ExtendedWeatherWidget : UserControl, IDesktopComponentWidget, IDesktopPageVisibilityAwareComponentWidget, ITimeZoneAwareComponentWidget, IWeatherInfoAwareComponentWidget, IComponentPlacementContextAware, IComponentSettingsStoreAware
 {
     private static readonly IWeatherInfoService DefaultWeatherInfoService = new XiaomiWeatherService();
     private static readonly IReadOnlyList<int> SupportedAutoRefreshIntervalsMinutes = RefreshIntervalCatalog.SupportedIntervalsMinutes;
@@ -25,7 +26,7 @@ public partial class ExtendedWeatherWidget : UserControl, IDesktopComponentWidge
     private readonly ScaleTransform _backgroundMotionScaleTransform = new(1, 1);
     private readonly TranslateTransform _backgroundMotionTranslateTransform = new();
     private readonly AppSettingsService _settingsService = new();
-    private readonly ComponentSettingsService _componentSettingsService = new();
+    private IComponentInstanceSettingsStore _componentSettingsStore = new ComponentSettingsService();
     private readonly LocalizationService _localizationService = new();
 
     private IWeatherInfoService _weatherInfoService = DefaultWeatherInfoService;
@@ -39,6 +40,8 @@ public partial class ExtendedWeatherWidget : UserControl, IDesktopComponentWidge
     private bool _autoRefreshEnabled = true;
     private string _languageCode = "zh-CN";
     private HyperOS3WeatherVisualKind _activeVisualKind = HyperOS3WeatherVisualKind.ClearDay;
+    private string _componentId = BuiltInComponentIds.DesktopExtendedWeather;
+    private string _placementId = string.Empty;
     private readonly TextBlock[] _hourlyTempBlocks;
     private readonly TextBlock[] _hourlyTimeBlocks;
     private readonly Image[] _hourlyIconBlocks;
@@ -173,6 +176,21 @@ public partial class ExtendedWeatherWidget : UserControl, IDesktopComponentWidge
         }
     }
 
+    public void SetComponentPlacementContext(string componentId, string? placementId)
+    {
+        _componentId = string.IsNullOrWhiteSpace(componentId)
+            ? BuiltInComponentIds.DesktopExtendedWeather
+            : componentId.Trim();
+        _placementId = placementId?.Trim() ?? string.Empty;
+        RefreshFromSettings();
+    }
+
+    public void SetComponentSettingsStore(IComponentInstanceSettingsStore settingsStore)
+    {
+        _componentSettingsStore = settingsStore ?? new ComponentSettingsService();
+        RefreshFromSettings();
+    }
+
     public void SetDesktopPageContext(bool isOnActivePage, bool isEditMode)
     {
         _ = isEditMode;
@@ -935,7 +953,7 @@ public partial class ExtendedWeatherWidget : UserControl, IDesktopComponentWidge
 
         try
         {
-            var snapshot = _componentSettingsService.Load();
+            var snapshot = _componentSettingsStore.LoadForComponent(_componentId, _placementId);
             enabled = snapshot.WeatherAutoRefreshEnabled;
             intervalMinutes = NormalizeAutoRefreshIntervalMinutes(snapshot.WeatherAutoRefreshIntervalMinutes);
         }

LanMountainDesktop/Views/Components/HourlyWeatherWidget.axaml.cs

@@ -11,13 +11,14 @@ using Avalonia.Media;
 using Avalonia.Media.Imaging;
 using Avalonia.Platform;
 using Avalonia.Threading;
+using LanMountainDesktop.ComponentSystem;
 using LanMountainDesktop.Models;
 using LanMountainDesktop.Services;
 using LanMountainDesktop.Theme;
 
 namespace LanMountainDesktop.Views.Components;
 
-public partial class HourlyWeatherWidget : UserControl, IDesktopComponentWidget, IDesktopPageVisibilityAwareComponentWidget, ITimeZoneAwareComponentWidget, IWeatherInfoAwareComponentWidget
+public partial class HourlyWeatherWidget : UserControl, IDesktopComponentWidget, IDesktopPageVisibilityAwareComponentWidget, ITimeZoneAwareComponentWidget, IWeatherInfoAwareComponentWidget, IComponentPlacementContextAware, IComponentSettingsStoreAware
 {
     private enum WeatherVisualKind
     {
@@ -95,7 +96,7 @@ public partial class HourlyWeatherWidget : UserControl, IDesktopComponentWidget,
     };
 
     private readonly AppSettingsService _settingsService = new();
-    private readonly ComponentSettingsService _componentSettingsService = new();
+    private IComponentInstanceSettingsStore _componentSettingsStore = new ComponentSettingsService();
     private readonly LocalizationService _localizationService = new();
     private readonly Dictionary<WeatherVisualKind, IBrush> _backgroundBrushCache = new();
     private readonly Dictionary<HyperOS3WeatherVisualKind, IBrush> _particleBrushCache = new();
@@ -118,6 +119,8 @@ public partial class HourlyWeatherWidget : UserControl, IDesktopComponentWidget,
     private bool _isOnActivePage = true;
     private bool _isRefreshing;
     private bool _autoRefreshEnabled = true;
+    private string _componentId = BuiltInComponentIds.DesktopHourlyWeather;
+    private string _placementId = string.Empty;
     private readonly TextBlock[] _hourlyTimeBlocks;
     private readonly Image[] _hourlyIconBlocks;
     private readonly TextBlock[] _hourlyTempBlocks;
@@ -224,6 +227,21 @@ public partial class HourlyWeatherWidget : UserControl, IDesktopComponentWidget,
         }
     }
 
+    public void SetComponentPlacementContext(string componentId, string? placementId)
+    {
+        _componentId = string.IsNullOrWhiteSpace(componentId)
+            ? BuiltInComponentIds.DesktopHourlyWeather
+            : componentId.Trim();
+        _placementId = placementId?.Trim() ?? string.Empty;
+        RefreshFromSettings();
+    }
+
+    public void SetComponentSettingsStore(IComponentInstanceSettingsStore settingsStore)
+    {
+        _componentSettingsStore = settingsStore ?? new ComponentSettingsService();
+        RefreshFromSettings();
+    }
+
     public void SetDesktopPageContext(bool isOnActivePage, bool isEditMode)
     {
         _ = isEditMode;
@@ -1424,7 +1442,7 @@ public partial class HourlyWeatherWidget : UserControl, IDesktopComponentWidget,
 
         try
         {
-            var snapshot = _componentSettingsService.Load();
+            var snapshot = _componentSettingsStore.LoadForComponent(_componentId, _placementId);
             enabled = snapshot.WeatherAutoRefreshEnabled;
             intervalMinutes = NormalizeAutoRefreshIntervalMinutes(snapshot.WeatherAutoRefreshIntervalMinutes);
         }

LanMountainDesktop/Views/Components/MultiDayWeatherWidget.axaml.cs

@@ -9,13 +9,14 @@ using Avalonia;
 using Avalonia.Controls;
 using Avalonia.Media;
 using Avalonia.Threading;
+using LanMountainDesktop.ComponentSystem;
 using LanMountainDesktop.Models;
 using LanMountainDesktop.Services;
 using LanMountainDesktop.Theme;
 
 namespace LanMountainDesktop.Views.Components;
 
-public partial class MultiDayWeatherWidget : UserControl, IDesktopComponentWidget, IDesktopPageVisibilityAwareComponentWidget, ITimeZoneAwareComponentWidget, IWeatherInfoAwareComponentWidget
+public partial class MultiDayWeatherWidget : UserControl, IDesktopComponentWidget, IDesktopPageVisibilityAwareComponentWidget, ITimeZoneAwareComponentWidget, IWeatherInfoAwareComponentWidget, IComponentPlacementContextAware, IComponentSettingsStoreAware
 {
     private enum WeatherVisualKind
     {
@@ -93,7 +94,7 @@ public partial class MultiDayWeatherWidget : UserControl, IDesktopComponentWidge
     };
 
     private readonly AppSettingsService _settingsService = new();
-    private readonly ComponentSettingsService _componentSettingsService = new();
+    private IComponentInstanceSettingsStore _componentSettingsStore = new ComponentSettingsService();
     private readonly LocalizationService _localizationService = new();
     private readonly Dictionary<WeatherVisualKind, IBrush> _backgroundBrushCache = new();
     private readonly Dictionary<HyperOS3WeatherVisualKind, IBrush> _particleBrushCache = new();
@@ -116,6 +117,8 @@ public partial class MultiDayWeatherWidget : UserControl, IDesktopComponentWidge
     private bool _isOnActivePage = true;
     private bool _isRefreshing;
     private bool _autoRefreshEnabled = true;
+    private string _componentId = BuiltInComponentIds.DesktopMultiDayWeather;
+    private string _placementId = string.Empty;
     private readonly TextBlock[] _hourlyTimeBlocks;
     private readonly Image[] _hourlyIconBlocks;
     private readonly TextBlock[] _hourlyTempBlocks;
@@ -222,6 +225,21 @@ public partial class MultiDayWeatherWidget : UserControl, IDesktopComponentWidge
         }
     }
 
+    public void SetComponentPlacementContext(string componentId, string? placementId)
+    {
+        _componentId = string.IsNullOrWhiteSpace(componentId)
+            ? BuiltInComponentIds.DesktopMultiDayWeather
+            : componentId.Trim();
+        _placementId = placementId?.Trim() ?? string.Empty;
+        RefreshFromSettings();
+    }
+
+    public void SetComponentSettingsStore(IComponentInstanceSettingsStore settingsStore)
+    {
+        _componentSettingsStore = settingsStore ?? new ComponentSettingsService();
+        RefreshFromSettings();
+    }
+
     public void SetDesktopPageContext(bool isOnActivePage, bool isEditMode)
     {
         _ = isEditMode;
@@ -1274,7 +1292,7 @@ public partial class MultiDayWeatherWidget : UserControl, IDesktopComponentWidge
 
         try
         {
-            var snapshot = _componentSettingsService.Load();
+            var snapshot = _componentSettingsStore.LoadForComponent(_componentId, _placementId);
             enabled = snapshot.WeatherAutoRefreshEnabled;
             intervalMinutes = NormalizeAutoRefreshIntervalMinutes(snapshot.WeatherAutoRefreshIntervalMinutes);
         }

LanMountainDesktop/Views/Components/StudyEnvironmentWidget.axaml.cs

@@ -64,8 +64,16 @@ public partial class StudyEnvironmentWidget : UserControl, IDesktopComponentWidg
     public void SetDesktopPageContext(bool isOnActivePage, bool isEditMode)
     {
         _ = isEditMode;
+        var wasOnActivePage = _isOnActivePage;
         _isOnActivePage = isOnActivePage;
+        
         UpdateMonitoringLeaseState();
+        
+        if (isOnActivePage && !wasOnActivePage)
+        {
+            RefreshVisual();
+        }
+        
         UpdateTimerState();
     }
 
@@ -116,8 +124,7 @@ public partial class StudyEnvironmentWidget : UserControl, IDesktopComponentWidg
 
     private void UpdateMonitoringLeaseState()
     {
-        var shouldMonitor = _isAttached && _isOnActivePage;
-        if (shouldMonitor)
+        if (_isAttached)
         {
             _monitoringLease ??= _monitoringLeaseCoordinator.AcquireLease();
             return;

LanMountainDesktop/Views/Components/StudyNoiseCurveWidget.axaml.cs

@@ -1,4 +1,4 @@
-using System;
+using System;
 using System.Collections.Generic;
 using System.Globalization;
 using Avalonia;
@@ -11,7 +11,7 @@ using LanMountainDesktop.Theme;
 
 namespace LanMountainDesktop.Views.Components;
 
-public partial class StudyNoiseCurveWidget : UserControl, IDesktopComponentWidget, IDesktopPageVisibilityAwareComponentWidget
+public partial class StudyNoiseCurveWidget : UserControl, IDesktopComponentWidget, IDesktopPageVisibilityAwareComponentWidget, IDisposable
 {
     private const double NormalTextMinContrast = 4.5;
     private const double LargeTextMinContrast = 4.5;
@@ -69,6 +69,7 @@ public partial class StudyNoiseCurveWidget : UserControl, IDesktopComponentWidge
     private bool _isAttached;
     private bool _isOnActivePage = true;
     private bool _isSubscribed;
+    private bool _isDisposed;
     private int _framesSinceCompaction;
     private IDisposable? _monitoringLease;
 
@@ -131,8 +132,20 @@ public partial class StudyNoiseCurveWidget : UserControl, IDesktopComponentWidge
     public void SetDesktopPageContext(bool isOnActivePage, bool isEditMode)
     {
         _ = isEditMode;
+        var wasOnActivePage = _isOnActivePage;
         _isOnActivePage = isOnActivePage;
+        
         UpdateMonitoringLeaseState();
+        
+        if (isOnActivePage && !wasOnActivePage)
+        {
+            lock (_snapshotSync)
+            {
+                _pendingSnapshot = _studyAnalyticsService.GetSnapshot();
+                _hasPendingSnapshot = true;
+            }
+        }
+        
         UpdateRenderLoopState();
     }
 
@@ -231,8 +244,7 @@ public partial class StudyNoiseCurveWidget : UserControl, IDesktopComponentWidge
 
     private void UpdateMonitoringLeaseState()
     {
-        var shouldMonitor = _isAttached && _isOnActivePage;
-        if (shouldMonitor)
+        if (_isAttached)
         {
             _monitoringLease ??= _monitoringLeaseCoordinator.AcquireLease();
             return;
@@ -553,4 +565,29 @@ public partial class StudyNoiseCurveWidget : UserControl, IDesktopComponentWidge
     {
         return _localizationService.GetString(_languageCode, key, fallback);
     }
+
+    public void Dispose()
+    {
+        if (_isDisposed)
+        {
+            return;
+        }
+
+        _isDisposed = true;
+
+        _renderTimer.Stop();
+        _renderTimer.Tick -= OnRenderTimerTick;
+        AttachedToVisualTree -= OnAttachedToVisualTree;
+        DetachedFromVisualTree -= OnDetachedFromVisualTree;
+        SizeChanged -= OnSizeChanged;
+
+        if (_isSubscribed)
+        {
+            _studyAnalyticsService.SnapshotUpdated -= OnStudySnapshotUpdated;
+            _isSubscribed = false;
+        }
+
+        _monitoringLease?.Dispose();
+        _monitoringLease = null;
+    }
 }

LanMountainDesktop/Views/Components/StudyNoiseDistributionWidget.axaml.cs

@@ -93,8 +93,16 @@ public partial class StudyNoiseDistributionWidget : UserControl, IDesktopCompone
     public void SetDesktopPageContext(bool isOnActivePage, bool isEditMode)
     {
         _ = isEditMode;
+        var wasOnActivePage = _isOnActivePage;
         _isOnActivePage = isOnActivePage;
+        
         UpdateMonitoringLeaseState();
+        
+        if (isOnActivePage && !wasOnActivePage)
+        {
+            RefreshVisual();
+        }
+        
         UpdateTimerState();
     }
 
@@ -143,8 +151,7 @@ public partial class StudyNoiseDistributionWidget : UserControl, IDesktopCompone
 
     private void UpdateMonitoringLeaseState()
     {
-        var shouldMonitor = _isAttached && _isOnActivePage;
-        if (shouldMonitor)
+        if (_isAttached)
         {
             _monitoringLease ??= _monitoringLeaseCoordinator.AcquireLease();
             return;

LanMountainDesktop/Views/Components/StudySessionHistoryWidget.axaml.cs

@@ -1,4 +1,4 @@
-using System;
+using System;
 using System.Collections.Generic;
 using System.Globalization;
 using Avalonia;
@@ -15,7 +15,7 @@ using LanMountainDesktop.Theme;
 
 namespace LanMountainDesktop.Views.Components;
 
-public partial class StudySessionHistoryWidget : UserControl, IDesktopComponentWidget, IDesktopPageVisibilityAwareComponentWidget
+public partial class StudySessionHistoryWidget : UserControl, IDesktopComponentWidget, IDesktopPageVisibilityAwareComponentWidget, IDisposable
 {
     private const double MinTextContrast = 4.5;
     private enum HistoryDialogMode
@@ -55,6 +55,7 @@ public partial class StudySessionHistoryWidget : UserControl, IDesktopComponentW
     private bool _isAttached;
     private bool _isOnActivePage = true;
     private bool _isSubscribed;
+    private bool _isDisposed;
     private bool _isCompactMode;
     private bool _isUltraCompactMode;
     private string? _loadingSessionId;
@@ -733,6 +734,29 @@ public partial class StudySessionHistoryWidget : UserControl, IDesktopComponentW
 
         return min;
     }
+
+    public void Dispose()
+    {
+        if (_isDisposed)
+        {
+            return;
+        }
+
+        _isDisposed = true;
+
+        AttachedToVisualTree -= OnAttachedToVisualTree;
+        DetachedFromVisualTree -= OnDetachedFromVisualTree;
+        SizeChanged -= OnSizeChanged;
+        DialogCancelButton.Click -= (_, _) => CloseDialog();
+        DialogConfirmButton.Click -= (_, _) => ConfirmDialog();
+        DialogRenameTextBox.KeyDown -= OnDialogRenameTextBoxKeyDown;
+
+        if (_isSubscribed)
+        {
+            _studyAnalyticsService.SnapshotUpdated -= OnStudySnapshotUpdated;
+            _isSubscribed = false;
+        }
+    }
 }
 
 

LanMountainDesktop/Views/Components/WeatherClockWidget.axaml.cs

@@ -10,12 +10,13 @@ using Avalonia.Controls.Shapes;
 using Avalonia.Media;
 using Avalonia.Styling;
 using Avalonia.Threading;
+using LanMountainDesktop.ComponentSystem;
 using LanMountainDesktop.Models;
 using LanMountainDesktop.Services;
 
 namespace LanMountainDesktop.Views.Components;
 
-public partial class WeatherClockWidget : UserControl, IDesktopComponentWidget, ITimeZoneAwareComponentWidget, IWeatherInfoAwareComponentWidget
+public partial class WeatherClockWidget : UserControl, IDesktopComponentWidget, ITimeZoneAwareComponentWidget, IWeatherInfoAwareComponentWidget, IComponentPlacementContextAware, IComponentSettingsStoreAware
 {
     private sealed record WeatherClockConfig(
         string LanguageCode,
@@ -41,7 +42,7 @@ public partial class WeatherClockWidget : UserControl, IDesktopComponentWidget,
     };
 
     private readonly AppSettingsService _settingsService = new();
-    private readonly ComponentSettingsService _componentSettingsService = new();
+    private IComponentInstanceSettingsStore _componentSettingsStore = new ComponentSettingsService();
     private readonly LocalizationService _localizationService = new();
     private readonly Line _hourHandLine = CreateHandLine("#232938", 4.0);
     private readonly Line _minuteHandLine = CreateHandLine("#2F3749", 2.8);
@@ -59,6 +60,8 @@ public partial class WeatherClockWidget : UserControl, IDesktopComponentWidget,
     private bool? _isNightModeApplied;
     private string _languageCode = "zh-CN";
     private HyperOS3WeatherVisualKind _activeVisualKind = HyperOS3WeatherVisualKind.CloudyDay;
+    private string _componentId = BuiltInComponentIds.DesktopWeatherClock;
+    private string _placementId = string.Empty;
 
     public WeatherClockWidget()
     {
@@ -116,6 +119,21 @@ public partial class WeatherClockWidget : UserControl, IDesktopComponentWidget,
         }
     }
 
+    public void SetComponentPlacementContext(string componentId, string? placementId)
+    {
+        _componentId = string.IsNullOrWhiteSpace(componentId)
+            ? BuiltInComponentIds.DesktopWeatherClock
+            : componentId.Trim();
+        _placementId = placementId?.Trim() ?? string.Empty;
+        RefreshFromSettings();
+    }
+
+    public void SetComponentSettingsStore(IComponentInstanceSettingsStore settingsStore)
+    {
+        _componentSettingsStore = settingsStore ?? new ComponentSettingsService();
+        RefreshFromSettings();
+    }
+
     public void ApplyCellSize(double cellSize)
     {
         _currentCellSize = Math.Max(1, cellSize);
@@ -659,7 +677,7 @@ public partial class WeatherClockWidget : UserControl, IDesktopComponentWidget,
 
         try
         {
-            var snapshot = _componentSettingsService.Load();
+            var snapshot = _componentSettingsStore.LoadForComponent(_componentId, _placementId);
             enabled = snapshot.WeatherAutoRefreshEnabled;
             intervalMinutes = NormalizeAutoRefreshIntervalMinutes(snapshot.WeatherAutoRefreshIntervalMinutes);
         }

LanMountainDesktop/Views/Components/WeatherWidget.axaml.cs

@@ -11,13 +11,14 @@ using Avalonia.Media;
 using Avalonia.Media.Imaging;
 using Avalonia.Platform;
 using Avalonia.Threading;
+using LanMountainDesktop.ComponentSystem;
 using LanMountainDesktop.Models;
 using LanMountainDesktop.Services;
 using LanMountainDesktop.Theme;
 
 namespace LanMountainDesktop.Views.Components;
 
-public partial class WeatherWidget : UserControl, IDesktopComponentWidget, IDesktopPageVisibilityAwareComponentWidget, ITimeZoneAwareComponentWidget, IWeatherInfoAwareComponentWidget
+public partial class WeatherWidget : UserControl, IDesktopComponentWidget, IDesktopPageVisibilityAwareComponentWidget, ITimeZoneAwareComponentWidget, IWeatherInfoAwareComponentWidget, IComponentPlacementContextAware, IComponentSettingsStoreAware
 {
     private enum WeatherVisualKind
     {
@@ -89,7 +90,7 @@ public partial class WeatherWidget : UserControl, IDesktopComponentWidget, IDesk
     };
 
     private readonly AppSettingsService _settingsService = new();
-    private readonly ComponentSettingsService _componentSettingsService = new();
+    private IComponentInstanceSettingsStore _componentSettingsStore = new ComponentSettingsService();
     private readonly LocalizationService _localizationService = new();
     private readonly Dictionary<WeatherVisualKind, IBrush> _backgroundBrushCache = new();
     private readonly Dictionary<HyperOS3WeatherVisualKind, IBrush> _particleBrushCache = new();
@@ -112,6 +113,8 @@ public partial class WeatherWidget : UserControl, IDesktopComponentWidget, IDesk
     private bool _isOnActivePage = true;
     private bool _isRefreshing;
     private bool _autoRefreshEnabled = true;
+    private string _componentId = BuiltInComponentIds.DesktopWeather;
+    private string _placementId = string.Empty;
 
     public WeatherWidget()
     {
@@ -167,6 +170,21 @@ public partial class WeatherWidget : UserControl, IDesktopComponentWidget, IDesk
         }
     }
 
+    public void SetComponentPlacementContext(string componentId, string? placementId)
+    {
+        _componentId = string.IsNullOrWhiteSpace(componentId)
+            ? BuiltInComponentIds.DesktopWeather
+            : componentId.Trim();
+        _placementId = placementId?.Trim() ?? string.Empty;
+        RefreshFromSettings();
+    }
+
+    public void SetComponentSettingsStore(IComponentInstanceSettingsStore settingsStore)
+    {
+        _componentSettingsStore = settingsStore ?? new ComponentSettingsService();
+        RefreshFromSettings();
+    }
+
     public void SetDesktopPageContext(bool isOnActivePage, bool isEditMode)
     {
         _ = isEditMode;
@@ -1063,7 +1081,7 @@ public partial class WeatherWidget : UserControl, IDesktopComponentWidget, IDesk
 
         try
         {
-            var snapshot = _componentSettingsService.Load();
+            var snapshot = _componentSettingsStore.LoadForComponent(_componentId, _placementId);
             enabled = snapshot.WeatherAutoRefreshEnabled;
             intervalMinutes = NormalizeAutoRefreshIntervalMinutes(snapshot.WeatherAutoRefreshIntervalMinutes);
         }

LanMountainDesktop/Views/Components/WeatherWidgetSettingsWindow.axaml.cs

@@ -4,20 +4,23 @@ using System.Linq;
 using Avalonia.Controls;
 using Avalonia.Controls.Primitives;
 using Avalonia.Interactivity;
+using LanMountainDesktop.ComponentSystem;
 using LanMountainDesktop.Models;
 using LanMountainDesktop.Services;
 
 namespace LanMountainDesktop.Views.Components;
 
-public partial class WeatherWidgetSettingsWindow : UserControl
+public partial class WeatherWidgetSettingsWindow : UserControl, IComponentPlacementContextAware, IComponentSettingsStoreAware
 {
     private static readonly IReadOnlyList<int> SupportedIntervals = RefreshIntervalCatalog.SupportedIntervalsMinutes;
 
     private readonly AppSettingsService _appSettingsService = new();
-    private readonly ComponentSettingsService _componentSettingsService = new();
+    private IComponentInstanceSettingsStore _componentSettingsStore = new ComponentSettingsService();
     private readonly LocalizationService _localizationService = new();
     private bool _suppressEvents;
     private string _languageCode = "zh-CN";
+    private string _componentId = BuiltInComponentIds.DesktopWeather;
+    private string _placementId = string.Empty;
 
     public event EventHandler? SettingsChanged;
 
@@ -29,10 +32,27 @@ public partial class WeatherWidgetSettingsWindow : UserControl
         ApplyLocalization();
     }
 
+    public void SetComponentPlacementContext(string componentId, string? placementId)
+    {
+        _componentId = string.IsNullOrWhiteSpace(componentId)
+            ? BuiltInComponentIds.DesktopWeather
+            : componentId.Trim();
+        _placementId = placementId?.Trim() ?? string.Empty;
+        LoadState();
+        ApplyLocalization();
+    }
+
+    public void SetComponentSettingsStore(IComponentInstanceSettingsStore settingsStore)
+    {
+        _componentSettingsStore = settingsStore ?? new ComponentSettingsService();
+        LoadState();
+        ApplyLocalization();
+    }
+
     private void LoadState()
     {
         var appSnapshot = _appSettingsService.Load();
-        var componentSnapshot = _componentSettingsService.Load();
+        var componentSnapshot = _componentSettingsStore.LoadForComponent(_componentId, _placementId);
         _languageCode = _localizationService.NormalizeLanguageCode(appSnapshot.LanguageCode);
 
         var enabled = componentSnapshot.WeatherAutoRefreshEnabled;
@@ -83,10 +103,10 @@ public partial class WeatherWidgetSettingsWindow : UserControl
 
     private void SaveState()
     {
-        var snapshot = _componentSettingsService.Load();
+        var snapshot = _componentSettingsStore.LoadForComponent(_componentId, _placementId);
         snapshot.WeatherAutoRefreshEnabled = AutoRefreshCheckBox.IsChecked == true;
         snapshot.WeatherAutoRefreshIntervalMinutes = GetSelectedInterval();
-        _componentSettingsService.Save(snapshot);
+        _componentSettingsStore.SaveForComponent(_componentId, _placementId, snapshot);
         SettingsChanged?.Invoke(this, EventArgs.Empty);
     }
 

LanMountainDesktop/Views/Components/WorldClockWidget.axaml.cs

@@ -8,11 +8,12 @@ using Avalonia.Layout;
 using Avalonia.Media;
 using Avalonia.Styling;
 using Avalonia.Threading;
+using LanMountainDesktop.ComponentSystem;
 using LanMountainDesktop.Services;
 
 namespace LanMountainDesktop.Views.Components;
 
-public partial class WorldClockWidget : UserControl, IDesktopComponentWidget, ITimeZoneAwareComponentWidget
+public partial class WorldClockWidget : UserControl, IDesktopComponentWidget, ITimeZoneAwareComponentWidget, IComponentPlacementContextAware, IComponentSettingsStoreAware
 {
     private const int BaseWidthCells = 4;
     private const int BaseHeightCells = 2;
@@ -92,7 +93,7 @@ public partial class WorldClockWidget : UserControl, IDesktopComponentWidget, IT
     };
 
     private readonly AppSettingsService _appSettingsService = new();
-    private readonly ComponentSettingsService _componentSettingsService = new();
+    private IComponentInstanceSettingsStore _componentSettingsStore = new ComponentSettingsService();
     private readonly LocalizationService _localizationService = new();
     private readonly ClockEntryVisual[] _entryVisuals = new ClockEntryVisual[WorldClockTimeZoneCatalog.ClockCount];
     private readonly TimeZoneInfo[] _entryTimeZones = new TimeZoneInfo[WorldClockTimeZoneCatalog.ClockCount];
@@ -103,6 +104,8 @@ public partial class WorldClockWidget : UserControl, IDesktopComponentWidget, IT
     private DateTime _nextLanguageProbeUtc = DateTime.MinValue;
     private string _secondHandMode = ClockSecondHandMode.Tick;
     private bool _isNightVisual = true;
+    private string _componentId = BuiltInComponentIds.DesktopWorldClock;
+    private string _placementId = string.Empty;
 
     public WorldClockWidget()
     {
@@ -147,6 +150,21 @@ public partial class WorldClockWidget : UserControl, IDesktopComponentWidget, IT
         UpdateClockVisuals();
     }
 
+    public void SetComponentPlacementContext(string componentId, string? placementId)
+    {
+        _componentId = string.IsNullOrWhiteSpace(componentId)
+            ? BuiltInComponentIds.DesktopWorldClock
+            : componentId.Trim();
+        _placementId = placementId?.Trim() ?? string.Empty;
+        RefreshFromSettings();
+    }
+
+    public void SetComponentSettingsStore(IComponentInstanceSettingsStore settingsStore)
+    {
+        _componentSettingsStore = settingsStore ?? new ComponentSettingsService();
+        RefreshFromSettings();
+    }
+
     public void ApplyCellSize(double cellSize)
     {
         _currentCellSize = Math.Max(1, cellSize);
@@ -525,7 +543,7 @@ public partial class WorldClockWidget : UserControl, IDesktopComponentWidget, IT
     private void LoadFromSettings()
     {
         var appSnapshot = _appSettingsService.Load();
-        var componentSnapshot = _componentSettingsService.Load();
+        var componentSnapshot = _componentSettingsStore.LoadForComponent(_componentId, _placementId);
         _languageCode = _localizationService.NormalizeLanguageCode(appSnapshot.LanguageCode);
 
         var ids = WorldClockTimeZoneCatalog.NormalizeTimeZoneIds(componentSnapshot.WorldClockTimeZoneIds);

LanMountainDesktop/Views/Components/WorldClockWidgetSettingsWindow.axaml.cs

@@ -4,11 +4,12 @@ using System.Linq;
 using Avalonia.Controls;
 using Avalonia.Controls.Primitives;
 using Avalonia.Interactivity;
+using LanMountainDesktop.ComponentSystem;
 using LanMountainDesktop.Services;
 
 namespace LanMountainDesktop.Views.Components;
 
-public partial class WorldClockWidgetSettingsWindow : UserControl
+public partial class WorldClockWidgetSettingsWindow : UserControl, IComponentPlacementContextAware, IComponentSettingsStoreAware
 {
     private static readonly IReadOnlyDictionary<string, string> ZhTimeZoneNames =
         new Dictionary<string, string>(StringComparer.OrdinalIgnoreCase)
@@ -28,12 +29,14 @@ public partial class WorldClockWidgetSettingsWindow : UserControl
         };
 
     private readonly AppSettingsService _appSettingsService = new();
-    private readonly ComponentSettingsService _componentSettingsService = new();
+    private IComponentInstanceSettingsStore _componentSettingsStore = new ComponentSettingsService();
     private readonly LocalizationService _localizationService = new();
     private readonly TimeZoneService _timeZoneService = new();
     private readonly ComboBox[] _timeZoneComboBoxes;
     private bool _suppressEvents;
     private string _languageCode = "zh-CN";
+    private string _componentId = BuiltInComponentIds.DesktopWorldClock;
+    private string _placementId = string.Empty;
     private IReadOnlyList<TimeZoneInfo> _allTimeZones = Array.Empty<TimeZoneInfo>();
     private IReadOnlyList<string> _selectedTimeZoneIds = Array.Empty<string>();
     private string _secondHandMode = ClockSecondHandMode.Tick;
@@ -57,10 +60,29 @@ public partial class WorldClockWidgetSettingsWindow : UserControl
         PopulateTimeZoneComboBoxes();
     }
 
+    public void SetComponentPlacementContext(string componentId, string? placementId)
+    {
+        _componentId = string.IsNullOrWhiteSpace(componentId)
+            ? BuiltInComponentIds.DesktopWorldClock
+            : componentId.Trim();
+        _placementId = placementId?.Trim() ?? string.Empty;
+        LoadState();
+        ApplyLocalization();
+        PopulateTimeZoneComboBoxes();
+    }
+
+    public void SetComponentSettingsStore(IComponentInstanceSettingsStore settingsStore)
+    {
+        _componentSettingsStore = settingsStore ?? new ComponentSettingsService();
+        LoadState();
+        ApplyLocalization();
+        PopulateTimeZoneComboBoxes();
+    }
+
     private void LoadState()
     {
         var appSnapshot = _appSettingsService.Load();
-        var componentSnapshot = _componentSettingsService.Load();
+        var componentSnapshot = _componentSettingsStore.LoadForComponent(_componentId, _placementId);
         _languageCode = _localizationService.NormalizeLanguageCode(appSnapshot.LanguageCode);
 
         _allTimeZones = _timeZoneService
@@ -167,10 +189,10 @@ public partial class WorldClockWidgetSettingsWindow : UserControl
         var normalizedIds = WorldClockTimeZoneCatalog.NormalizeTimeZoneIds(selectedIds, _allTimeZones);
         _secondHandMode = GetSelectedSecondHandMode();
 
-        var snapshot = _componentSettingsService.Load();
+        var snapshot = _componentSettingsStore.LoadForComponent(_componentId, _placementId);
         snapshot.WorldClockTimeZoneIds = normalizedIds.ToList();
         snapshot.WorldClockSecondHandMode = _secondHandMode;
-        _componentSettingsService.Save(snapshot);
+        _componentSettingsStore.SaveForComponent(_componentId, _placementId, snapshot);
 
         _selectedTimeZoneIds = normalizedIds;
         SettingsChanged?.Invoke(this, EventArgs.Empty);

LanMountainDesktop/Views/MainWindow.ComponentSystem.cs

@@ -1,4 +1,4 @@
-using System;
+using System;
 using System.Collections.Generic;
 using System.Linq;
 using Avalonia;
@@ -14,6 +14,7 @@ using FluentIcons.Avalonia;
 using FluentIcons.Common;
 using LanMountainDesktop.ComponentSystem;
 using LanMountainDesktop.Models;
+using LanMountainDesktop.Services;
 using LanMountainDesktop.Theme;
 using LanMountainDesktop.Views.Components;
 
@@ -255,14 +256,15 @@ public partial class MainWindow
             return TaskbarContext.Desktop;
         }
 
-        return SettingsNavListBox?.SelectedIndex switch
+        var selectedItem = SettingsNavView?.SelectedItem as FluentAvalonia.UI.Controls.NavigationViewItem;
+        return selectedItem?.Tag?.ToString() switch
         {
-            0 => TaskbarContext.SettingsWallpaper,
-            1 => TaskbarContext.SettingsGrid,
-            2 => TaskbarContext.SettingsColor,
-            3 => TaskbarContext.SettingsStatusBar,
-            4 => TaskbarContext.SettingsWeather,
-            5 => TaskbarContext.SettingsRegion,
+            "Wallpaper" => TaskbarContext.SettingsWallpaper,
+            "Grid" => TaskbarContext.SettingsGrid,
+            "Color" => TaskbarContext.SettingsColor,
+            "StatusBar" => TaskbarContext.SettingsStatusBar,
+            "Weather" => TaskbarContext.SettingsWeather,
+            "Region" => TaskbarContext.SettingsRegion,
             _ => TaskbarContext.Desktop
         };
     }
@@ -681,23 +683,34 @@ public partial class MainWindow
         }
 
         ClearTimeZoneServiceBindings(_selectedDesktopComponentHost);
+        DisposeComponentIfNeeded(_selectedDesktopComponentHost);
 
         if (_desktopPageComponentGrids.TryGetValue(placement.PageIndex, out var pageGrid))
         {
             pageGrid.Children.Remove(_selectedDesktopComponentHost);
         }
 
-        // Remove from persisted placement list as well.
         _desktopComponentPlacements.Remove(placement);
+        _componentSettingsService.DeleteForComponent(placement.ComponentId, placement.PlacementId);
 
         ClearDesktopComponentSelection();
 
         ApplyTaskbarActionVisibility(GetCurrentTaskbarContext());
 
-        // 娣囨繂鐡ㄧ拋鍓х枂
         PersistSettings();
     }
 
+    private static void DisposeComponentIfNeeded(Border host)
+    {
+        if (TryGetContentHost(host) is Border contentHost && contentHost.Child is Control componentControl)
+        {
+            if (componentControl is IDisposable disposableComponent)
+            {
+                disposableComponent.Dispose();
+            }
+        }
+    }
+
     private void OpenComponentSettings()
     {
         if (_selectedDesktopComponentHost is null || _selectedDesktopComponentHost.Tag is not string placementId)
@@ -714,80 +727,80 @@ public partial class MainWindow
 
         if (placement.ComponentId == BuiltInComponentIds.Date)
         {
-            OpenDateComponentSettings();
+            OpenDateComponentSettings(placement);
             return;
         }
 
         if (placement.ComponentId == BuiltInComponentIds.DesktopClock)
         {
-            OpenDesktopClockComponentSettings();
+            OpenDesktopClockComponentSettings(placement);
             return;
         }
 
         if (placement.ComponentId == BuiltInComponentIds.DesktopClassSchedule)
         {
-            OpenClassScheduleComponentSettings();
+            OpenClassScheduleComponentSettings(placement);
             return;
         }
 
         if (placement.ComponentId == BuiltInComponentIds.DesktopWorldClock)
         {
-            OpenWorldClockComponentSettings();
+            OpenWorldClockComponentSettings(placement);
             return;
         }
 
         if (IsWeatherComponentId(placement.ComponentId))
         {
-            OpenWeatherComponentSettings();
+            OpenWeatherComponentSettings(placement);
             return;
         }
 
         if (placement.ComponentId == BuiltInComponentIds.DesktopDailyArtwork)
         {
-            OpenDailyArtworkComponentSettings();
+            OpenDailyArtworkComponentSettings(placement);
             return;
         }
 
         if (placement.ComponentId == BuiltInComponentIds.DesktopCnrDailyNews)
         {
-            OpenCnrDailyNewsComponentSettings();
+            OpenCnrDailyNewsComponentSettings(placement);
             return;
         }
 
         if (placement.ComponentId == BuiltInComponentIds.DesktopIfengNews)
         {
-            OpenIfengNewsComponentSettings();
+            OpenIfengNewsComponentSettings(placement);
             return;
         }
 
         if (placement.ComponentId == BuiltInComponentIds.DesktopDailyWord ||
             placement.ComponentId == BuiltInComponentIds.DesktopDailyWord2x2)
         {
-            OpenDailyWordComponentSettings();
+            OpenDailyWordComponentSettings(placement);
             return;
         }
 
         if (placement.ComponentId == BuiltInComponentIds.DesktopBilibiliHotSearch)
         {
-            OpenBilibiliHotSearchComponentSettings();
+            OpenBilibiliHotSearchComponentSettings(placement);
             return;
         }
 
         if (placement.ComponentId == BuiltInComponentIds.DesktopBaiduHotSearch)
         {
-            OpenBaiduHotSearchComponentSettings();
+            OpenBaiduHotSearchComponentSettings(placement);
             return;
         }
 
         if (placement.ComponentId == BuiltInComponentIds.DesktopStcn24Forum)
         {
-            OpenStcn24ForumComponentSettings();
+            OpenStcn24ForumComponentSettings(placement);
             return;
         }
 
         if (placement.ComponentId == BuiltInComponentIds.DesktopStudyEnvironment)
         {
-            OpenStudyEnvironmentComponentSettings();
+            OpenStudyEnvironmentComponentSettings(placement);
             return;
         }
     }
@@ -801,212 +814,129 @@ public partial class MainWindow
                string.Equals(componentId, BuiltInComponentIds.DesktopExtendedWeather, StringComparison.OrdinalIgnoreCase);
     }
 
-    private void OpenDateComponentSettings()
+    private void ShowComponentSettings(Control settingsContent, DesktopComponentPlacementSnapshot placement)
     {
         if (ComponentSettingsWindow is null || ComponentSettingsContentHost is null)
         {
             return;
         }
 
-        var settingsContent = new DateWidgetSettingsWindow();
+        var runtimeContext = new DesktopComponentRuntimeContext(
+            placement.ComponentId,
+            placement.PlacementId,
+            _componentSettingsService);
+
+        if (settingsContent is IComponentRuntimeContextAware runtimeContextAwareComponent)
+        {
+            runtimeContextAwareComponent.SetComponentRuntimeContext(runtimeContext);
+        }
+
+        if (settingsContent is IComponentPlacementContextAware placementAwareComponent)
+        {
+            placementAwareComponent.SetComponentPlacementContext(placement.ComponentId, placement.PlacementId);
+        }
+
+        if (settingsContent is IComponentSettingsStoreAware settingsStoreAwareComponent)
+        {
+            settingsStoreAwareComponent.SetComponentSettingsStore(_componentSettingsService);
+        }
+
+        ComponentSettingsService.ApplyScopedContextToTarget(settingsContent, placement.ComponentId, placement.PlacementId);
+
         ComponentSettingsContentHost.Content = settingsContent;
-        
         ComponentSettingsWindow.IsVisible = true;
         ComponentSettingsWindow.Opacity = 0;
-        
         ComponentSettingsWindow.Opacity = 1;
     }
 
-    private void OpenClassScheduleComponentSettings()
+    private void OpenDateComponentSettings(DesktopComponentPlacementSnapshot placement)
     {
-        if (ComponentSettingsWindow is null || ComponentSettingsContentHost is null)
-        {
-            return;
-        }
+        var settingsContent = new DateWidgetSettingsWindow();
+        ShowComponentSettings(settingsContent, placement);
+    }
 
+    private void OpenClassScheduleComponentSettings(DesktopComponentPlacementSnapshot placement)
+    {
         var settingsContent = new ClassScheduleSettingsWindow();
         settingsContent.SettingsChanged += OnClassScheduleSettingsChanged;
-        ComponentSettingsContentHost.Content = settingsContent;
-
-        ComponentSettingsWindow.IsVisible = true;
-        ComponentSettingsWindow.Opacity = 0;
-        ComponentSettingsWindow.Opacity = 1;
+        ShowComponentSettings(settingsContent, placement);
     }
 
-    private void OpenDesktopClockComponentSettings()
+    private void OpenDesktopClockComponentSettings(DesktopComponentPlacementSnapshot placement)
     {
-        if (ComponentSettingsWindow is null || ComponentSettingsContentHost is null)
-        {
-            return;
-        }
-
         var settingsContent = new AnalogClockWidgetSettingsWindow();
         settingsContent.SettingsChanged += OnDesktopClockSettingsChanged;
-        ComponentSettingsContentHost.Content = settingsContent;
-
-        ComponentSettingsWindow.IsVisible = true;
-        ComponentSettingsWindow.Opacity = 0;
-        ComponentSettingsWindow.Opacity = 1;
+        ShowComponentSettings(settingsContent, placement);
     }
 
-    private void OpenWorldClockComponentSettings()
+    private void OpenWorldClockComponentSettings(DesktopComponentPlacementSnapshot placement)
     {
-        if (ComponentSettingsWindow is null || ComponentSettingsContentHost is null)
-        {
-            return;
-        }
-
         var settingsContent = new WorldClockWidgetSettingsWindow();
         settingsContent.SettingsChanged += OnWorldClockSettingsChanged;
-        ComponentSettingsContentHost.Content = settingsContent;
-
-        ComponentSettingsWindow.IsVisible = true;
-        ComponentSettingsWindow.Opacity = 0;
-        ComponentSettingsWindow.Opacity = 1;
+        ShowComponentSettings(settingsContent, placement);
     }
 
-    private void OpenWeatherComponentSettings()
+    private void OpenWeatherComponentSettings(DesktopComponentPlacementSnapshot placement)
     {
-        if (ComponentSettingsWindow is null || ComponentSettingsContentHost is null)
-        {
-            return;
-        }
-
         var settingsContent = new WeatherWidgetSettingsWindow();
         settingsContent.SettingsChanged += OnWeatherSettingsChanged;
-        ComponentSettingsContentHost.Content = settingsContent;
-
-        ComponentSettingsWindow.IsVisible = true;
-        ComponentSettingsWindow.Opacity = 0;
-        ComponentSettingsWindow.Opacity = 1;
+        ShowComponentSettings(settingsContent, placement);
     }
 
-    private void OpenStudyEnvironmentComponentSettings()
+    private void OpenStudyEnvironmentComponentSettings(DesktopComponentPlacementSnapshot placement)
     {
-        if (ComponentSettingsWindow is null || ComponentSettingsContentHost is null)
-        {
-            return;
-        }
-
         var settingsContent = new StudyEnvironmentWidgetSettingsWindow();
         settingsContent.SettingsChanged += OnStudyEnvironmentSettingsChanged;
-        ComponentSettingsContentHost.Content = settingsContent;
-
-        ComponentSettingsWindow.IsVisible = true;
-        ComponentSettingsWindow.Opacity = 0;
-        ComponentSettingsWindow.Opacity = 1;
+        ShowComponentSettings(settingsContent, placement);
     }
 
-    private void OpenDailyArtworkComponentSettings()
+    private void OpenDailyArtworkComponentSettings(DesktopComponentPlacementSnapshot placement)
     {
-        if (ComponentSettingsWindow is null || ComponentSettingsContentHost is null)
-        {
-            return;
-        }
-
         var settingsContent = new DailyArtworkSettingsWindow();
         settingsContent.SettingsChanged += OnDailyArtworkSettingsChanged;
-        ComponentSettingsContentHost.Content = settingsContent;
-
-        ComponentSettingsWindow.IsVisible = true;
-        ComponentSettingsWindow.Opacity = 0;
-        ComponentSettingsWindow.Opacity = 1;
+        ShowComponentSettings(settingsContent, placement);
     }
 
-    private void OpenCnrDailyNewsComponentSettings()
+    private void OpenCnrDailyNewsComponentSettings(DesktopComponentPlacementSnapshot placement)
     {
-        if (ComponentSettingsWindow is null || ComponentSettingsContentHost is null)
-        {
-            return;
-        }
-
         var settingsContent = new CnrDailyNewsSettingsWindow();
         settingsContent.SettingsChanged += OnCnrDailyNewsSettingsChanged;
-        ComponentSettingsContentHost.Content = settingsContent;
-
-        ComponentSettingsWindow.IsVisible = true;
-        ComponentSettingsWindow.Opacity = 0;
-        ComponentSettingsWindow.Opacity = 1;
+        ShowComponentSettings(settingsContent, placement);
     }
 
-    private void OpenIfengNewsComponentSettings()
+    private void OpenIfengNewsComponentSettings(DesktopComponentPlacementSnapshot placement)
     {
-        if (ComponentSettingsWindow is null || ComponentSettingsContentHost is null)
-        {
-            return;
-        }
-
         var settingsContent = new IfengNewsSettingsWindow();
         settingsContent.SettingsChanged += OnIfengNewsSettingsChanged;
-        ComponentSettingsContentHost.Content = settingsContent;
-
-        ComponentSettingsWindow.IsVisible = true;
-        ComponentSettingsWindow.Opacity = 0;
-        ComponentSettingsWindow.Opacity = 1;
+        ShowComponentSettings(settingsContent, placement);
     }
 
-    private void OpenDailyWordComponentSettings()
+    private void OpenDailyWordComponentSettings(DesktopComponentPlacementSnapshot placement)
     {
-        if (ComponentSettingsWindow is null || ComponentSettingsContentHost is null)
-        {
-            return;
-        }
-
         var settingsContent = new DailyWordSettingsWindow();
         settingsContent.SettingsChanged += OnDailyWordSettingsChanged;
-        ComponentSettingsContentHost.Content = settingsContent;
-
-        ComponentSettingsWindow.IsVisible = true;
-        ComponentSettingsWindow.Opacity = 0;
-        ComponentSettingsWindow.Opacity = 1;
+        ShowComponentSettings(settingsContent, placement);
     }
 
-    private void OpenBilibiliHotSearchComponentSettings()
+    private void OpenBilibiliHotSearchComponentSettings(DesktopComponentPlacementSnapshot placement)
     {
-        if (ComponentSettingsWindow is null || ComponentSettingsContentHost is null)
-        {
-            return;
-        }
-
         var settingsContent = new BilibiliHotSearchSettingsWindow();
         settingsContent.SettingsChanged += OnBilibiliHotSearchSettingsChanged;
-        ComponentSettingsContentHost.Content = settingsContent;
-
-        ComponentSettingsWindow.IsVisible = true;
-        ComponentSettingsWindow.Opacity = 0;
-        ComponentSettingsWindow.Opacity = 1;
+        ShowComponentSettings(settingsContent, placement);
     }
 
-    private void OpenBaiduHotSearchComponentSettings()
+    private void OpenBaiduHotSearchComponentSettings(DesktopComponentPlacementSnapshot placement)
     {
-        if (ComponentSettingsWindow is null || ComponentSettingsContentHost is null)
-        {
-            return;
-        }
-
         var settingsContent = new BaiduHotSearchSettingsWindow();
         settingsContent.SettingsChanged += OnBaiduHotSearchSettingsChanged;
-        ComponentSettingsContentHost.Content = settingsContent;
-
-        ComponentSettingsWindow.IsVisible = true;
-        ComponentSettingsWindow.Opacity = 0;
-        ComponentSettingsWindow.Opacity = 1;
+        ShowComponentSettings(settingsContent, placement);
     }
 
-    private void OpenStcn24ForumComponentSettings()
+    private void OpenStcn24ForumComponentSettings(DesktopComponentPlacementSnapshot placement)
     {
-        if (ComponentSettingsWindow is null || ComponentSettingsContentHost is null)
-        {
-            return;
-        }
-
         var settingsContent = new Stcn24ForumSettingsWindow();
         settingsContent.SettingsChanged += OnStcn24ForumSettingsChanged;
-        ComponentSettingsContentHost.Content = settingsContent;
-
-        ComponentSettingsWindow.IsVisible = true;
-        ComponentSettingsWindow.Opacity = 0;
-        ComponentSettingsWindow.Opacity = 1;
+        ShowComponentSettings(settingsContent, placement);
     }
 
     private void OnClassScheduleSettingsChanged(object? sender, EventArgs e)
@@ -1389,11 +1319,16 @@ public partial class MainWindow
         if (_desktopPageComponentGrids.TryGetValue(_currentDesktopSurfaceIndex, out var pageGrid))
         {
             ClearTimeZoneServiceBindings(pageGrid.Children.OfType<Control>().ToList());
+            foreach (var child in pageGrid.Children.OfType<Border>())
+            {
+                DisposeComponentIfNeeded(child);
+            }
         }
         
         foreach (var placement in placementsToRemove)
         {
             _desktopComponentPlacements.Remove(placement);
+            _componentSettingsService.DeleteForComponent(placement.ComponentId, placement.PlacementId);
         }
 
         _desktopPageCount = Math.Clamp(_desktopPageCount - 1, MinDesktopPageCount, MaxDesktopPageCount);
@@ -1417,7 +1352,7 @@ public partial class MainWindow
         ApplyTaskbarActionVisibility(GetCurrentTaskbarContext());
     }
 
-    private void InitializeDesktopComponentPlacements(AppSettingsSnapshot snapshot)
+    private void InitializeDesktopComponentPlacements(DesktopLayoutSettingsSnapshot snapshot)
     {
         _desktopComponentPlacements.Clear();
 
@@ -1587,7 +1522,7 @@ public partial class MainWindow
             placement.PlacementId = Guid.NewGuid().ToString("N");
         }
 
-        var component = CreateDesktopComponentControl(placement.ComponentId);
+        var component = CreateDesktopComponentControl(placement.ComponentId, placement.PlacementId);
         if (component is null)
         {
             return null;
@@ -2021,7 +1956,7 @@ public partial class MainWindow
         return onLeft || onRight || onTop || onBottom;
     }
 
-    private Control? CreateDesktopComponentControl(string componentId)
+    private Control? CreateDesktopComponentControl(string componentId, string? placementId = null)
     {
         if (!_componentRuntimeRegistry.TryGetDescriptor(componentId, out var runtimeDescriptor))
         {
@@ -2033,7 +1968,9 @@ public partial class MainWindow
             _timeZoneService,
             _weatherDataService,
             _recommendationInfoService,
-            _calculatorDataService);
+            _calculatorDataService,
+            _componentSettingsService,
+            placementId);
         component.Classes.Add(DesktopComponentClass);
         return component;
     }
@@ -3181,7 +3118,8 @@ public partial class MainWindow
                 _timeZoneService,
                 _weatherDataService,
                 _recommendationInfoService,
-                _calculatorDataService);
+                _calculatorDataService,
+                _componentSettingsService);
             // Component library previews must stay non-interactive so drag gesture is reliable.
             previewControl.IsHitTestVisible = false;
             previewControl.Focusable = false;
@@ -3278,7 +3216,9 @@ public partial class MainWindow
 
     private string GetLocalizedComponentDisplayName(DesktopComponentRuntimeDescriptor descriptor)
     {
-        return L(descriptor.DisplayNameLocalizationKey, descriptor.Definition.DisplayName);
+        return string.IsNullOrWhiteSpace(descriptor.DisplayNameLocalizationKey)
+            ? descriptor.Definition.DisplayName
+            : L(descriptor.DisplayNameLocalizationKey, descriptor.Definition.DisplayName);
     }
 
     private void OnComponentLibraryComponentPreviewPointerPressed(object? sender, PointerPressedEventArgs e)
@@ -3584,4 +3524,3 @@ public partial class MainWindow
         ApplyComponentLibraryComponentOffset();
     }
 }
-

LanMountainDesktop/Views/MainWindow.DesktopPaging.cs

@@ -13,6 +13,7 @@ using Avalonia.Media;
 using Avalonia.Media.Imaging;
 using Avalonia.Threading;
 using Avalonia.VisualTree;
+using FluentAvalonia.UI.Controls;
 using LanMountainDesktop.Models;
 using LanMountainDesktop.Services;
 
@@ -66,14 +67,14 @@ public partial class MainWindow
 
     private int TotalSurfaceCount => LauncherSurfaceIndex + 1;
 
-    private void InitializeDesktopSurfaceState(AppSettingsSnapshot snapshot)
+    private void InitializeDesktopSurfaceState(DesktopLayoutSettingsSnapshot snapshot)
     {
         var loadedPageCount = snapshot.DesktopPageCount <= 0 ? MinDesktopPageCount : snapshot.DesktopPageCount;
         _desktopPageCount = Math.Clamp(loadedPageCount, MinDesktopPageCount, MaxDesktopPageCount);
         _currentDesktopSurfaceIndex = Math.Clamp(snapshot.CurrentDesktopSurfaceIndex, 0, LauncherSurfaceIndex);
     }
 
-    private void InitializeLauncherVisibilitySettings(AppSettingsSnapshot snapshot)
+    private void InitializeLauncherVisibilitySettings(LauncherSettingsSnapshot snapshot)
     {
         _hiddenLauncherFolderPaths.Clear();
         if (snapshot.HiddenLauncherFolderPaths is not null)
@@ -1069,12 +1070,12 @@ public partial class MainWindow
 
     private void RenderLauncherHiddenItemsList()
     {
-        if (LauncherHiddenItemsListPanel is null || LauncherHiddenItemsEmptyTextBlock is null)
+        if (LauncherHiddenItemsSettingsExpander is null || LauncherHiddenItemsEmptyTextBlock is null)
         {
             return;
         }
 
-        LauncherHiddenItemsListPanel.Children.Clear();
+        LauncherHiddenItemsSettingsExpander.Items.Clear();
         var hiddenItems = BuildLauncherHiddenItems();
         LauncherHiddenItemsEmptyTextBlock.IsVisible = hiddenItems.Count == 0;
         if (hiddenItems.Count == 0)
@@ -1084,7 +1085,7 @@ public partial class MainWindow
 
         foreach (var hiddenItem in hiddenItems)
         {
-            LauncherHiddenItemsListPanel.Children.Add(CreateLauncherHiddenItemRow(hiddenItem));
+            LauncherHiddenItemsSettingsExpander.Items.Add(CreateLauncherHiddenItemRow(hiddenItem));
         }
     }
 
@@ -1186,92 +1187,47 @@ public partial class MainWindow
             : fileName;
     }
 
-    private Control CreateLauncherHiddenItemRow(LauncherHiddenItemView hiddenItem)
+    private SettingsExpanderItem CreateLauncherHiddenItemRow(LauncherHiddenItemView hiddenItem)
     {
-        Control icon = hiddenItem.IconBitmap is not null
-            ? new Image
-            {
-                Source = hiddenItem.IconBitmap,
-                Width = 24,
-                Height = 24,
-                Stretch = Stretch.Uniform
-            }
-            : new Border
-            {
-                Width = 24,
-                Height = 24,
-                CornerRadius = new CornerRadius(999),
-                Background = GetThemeBrush("AdaptiveButtonBackgroundBrush"),
-                Child = new TextBlock
-                {
-                    Text = hiddenItem.Monogram,
-                    FontSize = 10,
-                    FontWeight = FontWeight.Bold,
-                    HorizontalAlignment = HorizontalAlignment.Center,
-                    VerticalAlignment = VerticalAlignment.Center
-                }
-            };
-
         var typeText = hiddenItem.Kind == LauncherEntryKind.Folder
             ? L("settings.launcher.hidden_type_folder", "Folder")
             : L("settings.launcher.hidden_type_shortcut", "Shortcut");
 
-        var infoPanel = new StackPanel
-        {
-            Orientation = Orientation.Horizontal,
-            Spacing = 10,
-            VerticalAlignment = VerticalAlignment.Center,
-            HorizontalAlignment = HorizontalAlignment.Stretch
-        };
-        infoPanel.Children.Add(icon);
-        infoPanel.Children.Add(new StackPanel
-        {
-            Spacing = 2,
-            VerticalAlignment = VerticalAlignment.Center,
-            HorizontalAlignment = HorizontalAlignment.Left,
-            Children =
-            {
-                new TextBlock
-                {
-                    Text = hiddenItem.DisplayName,
-                    TextTrimming = TextTrimming.CharacterEllipsis,
-                    MaxLines = 1
-                },
-                new TextBlock
-                {
-                    Text = typeText,
-                    FontSize = 11,
-                    Opacity = 0.7
-                }
-            }
-        });
-
         var restoreButton = new Button
         {
-            Content = L("settings.launcher.restore_button", "Show Again"),
+            Content = L("settings.launcher.restore_button", "Unhide"),
             MinWidth = 110,
             Padding = new Thickness(12, 6),
             Tag = new LauncherHiddenItemToken(hiddenItem.Kind, hiddenItem.Key)
         };
         restoreButton.Click += OnRestoreLauncherHiddenItemClick;
 
-        var row = new Grid
+        return new SettingsExpanderItem
         {
-            ColumnDefinitions = new ColumnDefinitions("*,Auto"),
-            ColumnSpacing = 10
+            Content = hiddenItem.DisplayName,
+            Description = typeText,
+            IconSource = CreateLauncherHiddenItemIconSource(hiddenItem),
+            IsClickEnabled = false,
+            Footer = restoreButton
         };
-        row.Children.Add(infoPanel);
-        Grid.SetColumn(infoPanel, 0);
-        row.Children.Add(restoreButton);
-        Grid.SetColumn(restoreButton, 1);
+    }
 
-        return new Border
+    private IconSource CreateLauncherHiddenItemIconSource(LauncherHiddenItemView hiddenItem)
+    {
+        if (hiddenItem.IconBitmap is not null)
         {
-            Classes = { "glass-panel" },
-            BorderThickness = new Thickness(0),
-            CornerRadius = new CornerRadius(14),
-            Padding = new Thickness(10, 8),
-            Child = row
+            return new ImageIconSource
+            {
+                Source = hiddenItem.IconBitmap
+            };
+        }
+
+        return new FluentIcons.Avalonia.Fluent.SymbolIconSource
+        {
+            Symbol = hiddenItem.Kind == LauncherEntryKind.Folder
+                ? FluentIcons.Common.Symbol.Folder
+                : FluentIcons.Common.Symbol.Apps,
+            IconVariant = FluentIcons.Common.IconVariant.Regular
         };
     }
 

LanMountainDesktop/Views/MainWindow.Localization.cs

@@ -1,10 +1,12 @@
 using System;
 using System.Collections.Generic;
+using System.Linq;
 using Avalonia.Controls;
 using Avalonia.Interactivity;
 using Avalonia.Layout;
 using FluentIcons.Avalonia;
 using FluentIcons.Common;
+using LanMountainDesktop.Services;
 
 namespace LanMountainDesktop.Views;
 
@@ -107,16 +109,17 @@ public partial class MainWindow
         ToolTip.SetTip(LauncherFolderBackButton, L("common.back", "Back"));
         ToolTip.SetTip(LauncherFolderCloseButton, L("common.close", "Close"));
 
-        SettingsNavHeaderTextBlock.Text = L("settings.nav_header", "Settings");
-        SettingsNavWallpaperTextBlock.Text = L("settings.nav.wallpaper", "Wallpaper");
-        SettingsNavGridTextBlock.Text = L("settings.nav.grid", "Grid");
-        SettingsNavColorTextBlock.Text = L("settings.nav.color", "Color");
-        SettingsNavStatusBarTextBlock.Text = L("settings.nav.status_bar", "Status Bar");
-        SettingsNavWeatherTextBlock.Text = L("settings.nav.weather", "Weather");
-        SettingsNavRegionTextBlock.Text = L("settings.nav.region", "Region");
-        SettingsNavUpdateTextBlock.Text = L("settings.nav.update", "Update");
-        SettingsNavLauncherTextBlock.Text = L("settings.nav.launcher", "App Launcher");
-        SettingsNavPluginsTextBlock.Text = L("settings.nav.plugins", "Plugins");
+        // SettingsNavHeaderTextBlock no longer exists
+        SettingsNavWallpaperItem.Content = L("settings.nav.wallpaper", "Wallpaper");
+        SettingsNavGridItem.Content = L("settings.nav.grid", "Grid");
+        SettingsNavColorItem.Content = L("settings.nav.color", "Color");
+        SettingsNavStatusBarItem.Content = L("settings.nav.status_bar", "Status Bar");
+        SettingsNavWeatherItem.Content = L("settings.nav.weather", "Weather");
+        SettingsNavRegionItem.Content = L("settings.nav.region", "Region");
+        SettingsNavUpdateItem.Content = L("settings.nav.update", "Update");
+        SettingsNavLauncherItem.Content = L("settings.nav.launcher", "App Launcher");
+        SettingsNavPluginsItem.Content = L("settings.nav.plugins", "Plugins");
+        SettingsNavPluginMarketItem.Content = L("settings.nav.plugin_market", "Plugin Market");
 
         WallpaperPanelTitleTextBlock.Text = L("settings.wallpaper.title", "Personalize your wallpaper");
         WallpaperPlacementSettingsExpander.Header = L("settings.wallpaper.placement_label", "Placement");
@@ -127,10 +130,10 @@ public partial class MainWindow
         ClearWallpaperButton.Content = L("settings.wallpaper.clear_button", "Reset");
 
         GridPanelTitleTextBlock.Text = L("settings.grid.title", "Grid Layout");
-        GridSpacingPresetLabelTextBlock.Text = L("settings.grid.spacing_label", "Grid Spacing");
+        GridSpacingSettingsExpander.Header = L("settings.grid.spacing_label", "Grid Spacing");
         GridSpacingRelaxedComboBoxItem.Content = L("settings.grid.spacing_relaxed", "Relaxed");
         GridSpacingCompactComboBoxItem.Content = L("settings.grid.spacing_compact", "Compact");
-        GridEdgeInsetLabelTextBlock.Text = L("settings.grid.edge_inset_label", "Screen Inset");
+        GridEdgeInsetSettingsExpander.Header = L("settings.grid.edge_inset_label", "Screen Inset");
         ApplyGridButton.Content = L("settings.grid.apply_button", "Apply");
         UpdateGridEdgeInsetComputedPxText(_currentDesktopCellSize);
 
@@ -175,9 +178,17 @@ public partial class MainWindow
         StatusBarSpacingModeCompactItem.Content = L("settings.status_bar.spacing_mode_compact", "Compact");
         StatusBarSpacingModeRelaxedItem.Content = L("settings.status_bar.spacing_mode_relaxed", "Relaxed");
         StatusBarSpacingModeCustomItem.Content = L("settings.status_bar.spacing_mode_custom", "Custom");
-        StatusBarSpacingCustomLabelTextBlock.Text = L("settings.status_bar.spacing_custom_label", "Custom spacing (%)");
+        StatusBarSpacingCustomPanel.Content = L("settings.status_bar.spacing_custom_label", "Custom spacing (%)");
 
         WeatherPanelTitleTextBlock.Text = L("settings.weather.title", "Weather");
+        WeatherPreviewSectionTextBlock.Text = L("settings.weather.preview_section", "Weather Preview");
+        WeatherSettingsSectionTextBlock.Text = L("settings.weather.settings_section", "Settings");
+        WeatherPreviewSettingsExpander.Header = L("settings.weather.preview_panel_header", "Weather Preview");
+        WeatherPreviewSettingsExpander.Description = L(
+            "settings.weather.preview_panel_desc",
+            "Refresh and verify current weather service status.");
+        WeatherPreviewButton.Content = L("settings.weather.refresh_button", "Refresh");
+
         WeatherLocationSettingsExpander.Header = L("settings.weather.location_source_header", "Location Source");
         WeatherLocationSettingsExpander.Description = L(
             "settings.weather.location_source_desc",
@@ -187,6 +198,10 @@ public partial class MainWindow
         WeatherLocationModeCityChipItem.Content = L("settings.weather.mode_city_search", "City Search");
         WeatherLocationModeCoordinatesChipItem.Content = L("settings.weather.mode_coordinates", "Coordinates");
         WeatherAutoRefreshToggleSwitch.Content = L("settings.weather.auto_refresh", "Auto refresh location on startup");
+        WeatherLocationSelectionTitleTextBlock.Text = L("settings.weather.city_selection_label", "City Selection");
+        WeatherLocationSelectionDescriptionTextBlock.Text = L(
+            "settings.weather.location_city_summary_desc",
+            "Select the current city used for weather queries.");
 
         WeatherCitySearchSettingsExpander.Header = L("settings.weather.city_search_header", "City Search");
         WeatherCitySearchSettingsExpander.Description = L(
@@ -206,16 +221,12 @@ public partial class MainWindow
         WeatherLocationNameTextBox.Watermark = L("settings.weather.location_name_placeholder", "Display name (optional)");
         WeatherApplyCoordinatesButton.Content = L("settings.weather.apply_coordinates_button", "Apply Coordinates");
 
-        WeatherPreviewSettingsExpander.Header = L("settings.weather.preview_panel_header", "Weather Preview");
-        WeatherPreviewSettingsExpander.Description = L(
-            "settings.weather.preview_panel_desc",
-            "Refresh and verify current weather service status.");
-        WeatherPreviewButton.Content = L("settings.weather.refresh_button", "Refresh");
-
         WeatherAlertFilterSettingsExpander.Header = L("settings.weather.alert_filter_header", "Excluded Alerts");
         WeatherAlertFilterSettingsExpander.Description = L(
             "settings.weather.alert_filter_desc",
             "Alerts containing these words will not be shown. One rule per line.");
+        WeatherAlertListTitleTextBlock.Text = L("settings.weather.alert_list_label", "Exclude List");
+        WeatherAlertListDescriptionTextBlock.Text = L("settings.weather.alert_list_desc", "One exclusion rule per line.");
         WeatherExcludedAlertsTextBox.Watermark = L("settings.weather.alert_filter_placeholder", "One keyword per line");
 
         WeatherIconPackSettingsExpander.Header = L("settings.weather.icon_style_header", "Weather Icon Style");
@@ -229,6 +240,10 @@ public partial class MainWindow
         WeatherNoTlsSettingsExpander.Description = L(
             "settings.weather.no_tls_desc",
             "Not recommended. Enable only for incompatible network environments.");
+        WeatherNoTlsToggleSwitch.Content = L("settings.weather.no_tls_toggle", "Allow non-TLS request fallback");
+        WeatherFooterHintTextBlock.Text = L(
+            "settings.weather.footer_hint",
+            "Desktop weather widgets will reuse the location and alert exclusion settings configured here.");
 
         if (string.IsNullOrWhiteSpace(_weatherSearchKeyword))
         {
@@ -248,6 +263,7 @@ public partial class MainWindow
 
         RegionPanelTitleTextBlock.Text = L("settings.region.title", "Region");
         LanguageSettingsExpander.Header = L("settings.region.language_header", "Language");
+        LanguageSettingsExpander.Description = L("settings.region.language_desc", "Select application language. Changes apply immediately.");
         LanguageChineseItem.Content = L("settings.region.language_zh", "Chinese");
         LanguageEnglishItem.Content = L("settings.region.language_en", "English");
         TimeZoneSettingsExpander.Header = L("settings.region.timezone_header", "Time Zone");
@@ -267,19 +283,10 @@ public partial class MainWindow
             "Right-click an icon in launcher to hide it. Hidden entries appear here.");
         LauncherHiddenItemsEmptyTextBlock.Text = L("settings.launcher.hidden_empty", "No hidden items.");
 
-        PluginSettingsPanelTitleTextBlock.Text = L("settings.plugins.title", "Plugins");
-        PluginSystemSettingsExpander.Header = L("settings.plugins.runtime_header", "Plugin Runtime");
-        PluginSystemSettingsExpander.Description = L(
-            "settings.plugins.runtime_desc",
-            "Manage plugin loading and backend isolation.");
-        PluginSystemDescriptionTextBlock.Text = L(
-            "settings.plugins.runtime_hint",
-            "This page will host installed plugin management, permission review, and sandboxed backend runtime controls.");
-        PluginSystemStatusTextBlock.Text = L(
-            "settings.plugins.runtime_status",
-            "Plugin management UI is not connected yet. Next step is wiring the loader, permissions, and worker isolation state into this panel.");
+        ApplyPluginSettingsLocalization();
+        ApplyPluginMarketSettingsLocalization();
 
-        SettingsNavAboutTextBlock.Text = L("settings.nav.about", "About");
+        SettingsNavAboutItem.Content = L("settings.nav.about", "About");
         AboutPanelTitleTextBlock.Text = L("settings.about.title", "About");
         VersionTextBlock.Text = Lf(
             "settings.about.version_format",
@@ -297,6 +304,17 @@ public partial class MainWindow
         AboutStartupSettingsExpander.Description = L(
             "settings.about.startup_desc",
             "Launch the app automatically when signing in to Windows.");
+        AboutRenderModeSettingsExpander.Header = L("settings.about.render_mode_header", "Rendering Mode");
+        AboutRenderModeSettingsExpander.Description = L(
+            "settings.about.render_mode_desc",
+            "Choose the rendering backend. Restart the app after changing this option. Unsupported modes fall back to software.");
+        SetAppRenderModeComboItemContent(AppRenderingModeHelper.Default, L("settings.about.render_mode.default", "Default"));
+        SetAppRenderModeComboItemContent(AppRenderingModeHelper.Software, L("settings.about.render_mode.software", "Software"));
+        SetAppRenderModeComboItemContent(AppRenderingModeHelper.AngleEgl, L("settings.about.render_mode.angle_egl", "angleEgl"));
+        SetAppRenderModeComboItemContent(AppRenderingModeHelper.Wgl, L("settings.about.render_mode.wgl", "WGL"));
+        SetAppRenderModeComboItemContent(AppRenderingModeHelper.Vulkan, L("settings.about.render_mode.vulkan", "Vulkan"));
+        UpdateCurrentRenderBackendStatus();
+        UpdatePendingRestartDock();
 
         if (WallpaperPlacementComboBox?.ItemCount >= 5)
         {
@@ -323,6 +341,19 @@ public partial class MainWindow
         UpdateWallpaperDisplay();
     }
 
+    private void SetAppRenderModeComboItemContent(string tag, string content)
+    {
+        var item = AppRenderModeComboBox.Items
+            .OfType<ComboBoxItem>()
+            .FirstOrDefault(candidate =>
+                string.Equals(candidate.Tag?.ToString(), tag, StringComparison.OrdinalIgnoreCase));
+
+        if (item is not null)
+        {
+            item.Content = content;
+        }
+    }
+
     private string GetLocalizedTimeZoneDisplayName(TimeZoneInfo timeZone)
     {
         var offset = timeZone.GetUtcOffset(DateTime.UtcNow);
@@ -393,6 +424,7 @@ public partial class MainWindow
                 WeatherLocationStatusTextBlock.Text = L(
                     "settings.weather.status_city_empty",
                     "No city location is configured.");
+                UpdateWeatherLocationSummaryCard();
                 return;
             }
 
@@ -405,6 +437,7 @@ public partial class MainWindow
                 modeText,
                 locationName,
                 _weatherLocationKey);
+            UpdateWeatherLocationSummaryCard();
             return;
         }
 
@@ -417,5 +450,7 @@ public partial class MainWindow
             string.IsNullOrWhiteSpace(_weatherLocationKey)
                 ? BuildCoordinateLocationKey(_weatherLatitude, _weatherLongitude)
                 : _weatherLocationKey);
+        UpdateWeatherLocationSummaryCard();
     }
 }
+

LanMountainDesktop/Views/MainWindow.RenderBackend.cs

@@ -0,0 +1,42 @@
+using System;
+using LanMountainDesktop.Services;
+
+namespace LanMountainDesktop.Views;
+
+public partial class MainWindow
+{
+    private void UpdateCurrentRenderBackendStatus()
+    {
+        var backendInfo = AppRenderBackendDiagnostics.Detect();
+        var localizedBackend = GetLocalizedRenderBackendName(backendInfo.ActualBackend);
+
+        CurrentRenderBackendLabelTextBlock.Text = L(
+            "settings.about.render_mode.current_label",
+            "Current actual backend");
+        CurrentRenderBackendValueTextBlock.Text = Lf(
+            "settings.about.render_mode.current_format",
+            "Current backend: {0}",
+            localizedBackend);
+        CurrentRenderBackendImplementationTextBlock.Text = string.IsNullOrWhiteSpace(backendInfo.ImplementationTypeName)
+            ? L(
+                "settings.about.render_mode.impl_unavailable",
+                "Runtime implementation is unavailable.")
+            : Lf(
+                "settings.about.render_mode.impl_format",
+                "Runtime implementation: {0}",
+                backendInfo.ImplementationTypeName);
+    }
+
+    private string GetLocalizedRenderBackendName(string renderBackend)
+    {
+        return renderBackend switch
+        {
+            AppRenderingModeHelper.Default => L("settings.about.render_mode.default", "Default"),
+            AppRenderingModeHelper.Software => L("settings.about.render_mode.software", "Software"),
+            AppRenderingModeHelper.AngleEgl => L("settings.about.render_mode.angle_egl", "angleEgl"),
+            AppRenderingModeHelper.Wgl => L("settings.about.render_mode.wgl", "WGL"),
+            AppRenderingModeHelper.Vulkan => L("settings.about.render_mode.vulkan", "Vulkan"),
+            _ => L("settings.about.render_mode.unknown", "Unknown")
+        };
+    }
+}

LanMountainDesktop/Views/MainWindow.RestartPrompt.cs

@@ -0,0 +1,112 @@
+using System.Threading.Tasks;
+using Avalonia.Interactivity;
+using Avalonia.Threading;
+using FluentAvalonia.UI.Controls;
+using LanMountainDesktop.Services;
+
+namespace LanMountainDesktop.Views;
+
+public partial class MainWindow
+{
+    private bool _isRestartPromptVisible;
+
+    private void OnPendingRestartStateChanged()
+    {
+        if (Dispatcher.UIThread.CheckAccess())
+        {
+            UpdatePendingRestartDock();
+            return;
+        }
+
+        Dispatcher.UIThread.Post(UpdatePendingRestartDock);
+    }
+
+    private void UpdatePendingRestartDock()
+    {
+        PendingRestartDock.IsVisible = PendingRestartStateService.HasPendingRestart;
+        PendingRestartDockTitleTextBlock.Text = L("settings.restart_dock.title", "Restart required");
+        PendingRestartDockDescriptionTextBlock.Text = L(
+            "settings.restart_dock.description",
+            "Some changes will take effect after restarting the app.");
+        PendingRestartDockButtonTextBlock.Text = L("settings.restart_dock.button", "Restart app");
+    }
+
+    private async void OnPendingRestartDockButtonClick(object? sender, RoutedEventArgs e)
+    {
+        await ShowGenericRestartPromptAsync();
+    }
+
+    private Task ShowRenderModeRestartPromptAsync(string selectedMode)
+    {
+        var message = Lf(
+            "settings.restart_dialog.render_mode_message",
+            "Restart the app to switch the rendering mode from \"{0}\" to \"{1}\". Restart now?",
+            GetLocalizedAppRenderModeDisplayName(_runningAppRenderMode),
+            GetLocalizedAppRenderModeDisplayName(selectedMode));
+
+        return ShowRestartPromptCoreAsync(message);
+    }
+
+    private Task ShowGenericRestartPromptAsync()
+    {
+        return ShowRestartPromptCoreAsync(L(
+            "settings.restart_dock.description",
+            "Some changes will take effect after restarting the app."));
+    }
+
+    private async Task ShowRestartPromptCoreAsync(string message)
+    {
+        if (_isRestartPromptVisible)
+        {
+            return;
+        }
+
+        _isRestartPromptVisible = true;
+
+        try
+        {
+            var dialog = new ContentDialog
+            {
+                Title = L("settings.restart_dialog.title", "Restart required"),
+                Content = message,
+                PrimaryButtonText = L("settings.restart_dialog.restart", "Restart now"),
+                CloseButtonText = L("settings.restart_dialog.cancel", "Cancel"),
+                DefaultButton = ContentDialogButton.Primary
+            };
+
+            var result = await dialog.ShowAsync(this);
+            if (result == ContentDialogResult.Primary)
+            {
+                if (!AppRestartService.TryRestartApplication())
+                {
+                    UpdatePendingRestartDock();
+                }
+
+                return;
+            }
+
+            UpdatePendingRestartDock();
+        }
+        finally
+        {
+            _isRestartPromptVisible = false;
+        }
+    }
+
+    private string GetLocalizedAppRenderModeDisplayName(string renderMode)
+    {
+        if (renderMode == AppRenderBackendDiagnostics.Unknown)
+        {
+            return L("settings.about.render_mode.unknown", "Unknown");
+        }
+
+        return AppRenderingModeHelper.Normalize(renderMode) switch
+        {
+            AppRenderingModeHelper.Software => L("settings.about.render_mode.software", "Software"),
+            AppRenderingModeHelper.AngleEgl => L("settings.about.render_mode.angle_egl", "angleEgl"),
+            AppRenderingModeHelper.Wgl => L("settings.about.render_mode.wgl", "WGL"),
+            AppRenderingModeHelper.Vulkan => L("settings.about.render_mode.vulkan", "Vulkan"),
+            _ => L("settings.about.render_mode.default", "Default")
+        };
+    }
+}

LanMountainDesktop/Views/MainWindow.Settings.cs

@@ -1,5 +1,6 @@
 using System;
 using FluentIcons.Avalonia;
+using FluentIcons.Avalonia.Fluent;
 using FluentIcons.Common;
 using LanMountainDesktop.Views.Components;
 
@@ -19,6 +20,7 @@ using Avalonia.Platform;
 using Avalonia.Platform.Storage;
 using Avalonia.Styling;
 using Avalonia.Threading;
+using LanMountainDesktop.ComponentSystem;
 using LanMountainDesktop.Models;
 using LanMountainDesktop.Services;
 using LanMountainDesktop.Theme;
@@ -28,6 +30,47 @@ namespace LanMountainDesktop.Views;
 
 public partial class MainWindow
 {
+    private void OnExternalAppSettingsSaved(string sourceInstanceId)
+    {
+        if (string.Equals(sourceInstanceId, _appSettingsService.InstanceId, StringComparison.Ordinal))
+        {
+            return;
+        }
+
+        ScheduleReloadFromExternalSettings();
+    }
+
+    private void OnExternalLauncherSettingsSaved(string sourceInstanceId)
+    {
+        if (string.Equals(sourceInstanceId, _launcherSettingsService.InstanceId, StringComparison.Ordinal))
+        {
+            return;
+        }
+
+        ScheduleReloadFromExternalSettings();
+    }
+
+    private void ScheduleReloadFromExternalSettings()
+    {
+        if (_externalSettingsReloadPending)
+        {
+            return;
+        }
+
+        _externalSettingsReloadPending = true;
+        Dispatcher.UIThread.Post(() =>
+        {
+            _externalSettingsReloadPending = false;
+
+            if (!IsVisible)
+            {
+                return;
+            }
+
+            ReloadFromPersistedSettings();
+        }, DispatcherPriority.Background);
+    }
+
     private void OnOpenSettingsClick(object? sender, RoutedEventArgs e)
     {
         if (_isComponentLibraryOpen)
@@ -49,16 +92,20 @@ public partial class MainWindow
         CloseSettingsPage();
     }
 
-    private void OnSettingsNavSelectionChanged(object? sender, SelectionChangedEventArgs e)
+    private void OnSettingsNavSelectionChanged(object? sender, FluentAvalonia.UI.Controls.NavigationViewSelectionChangedEventArgs e)
     {
         UpdateSettingsTabContent();
         PersistSettings();
     }
 
+    private int GetSettingsTabIndex()
+    {
+        return ResolveSelectedSettingsTabIndex();
+    }
+
     private void UpdateSettingsTabContent()
     {
-        // SelectionChanged can fire during XAML initialization before all named controls are assigned.
-        if (SettingsNavListBox is null ||
+        if (SettingsNavView is null ||
             GridSettingsPanel is null ||
             WallpaperSettingsPanel is null ||
             ColorSettingsPanel is null ||
@@ -68,29 +115,44 @@ public partial class MainWindow
             UpdateSettingsPanel is null ||
             LauncherSettingsPanel is null ||
             AboutSettingsPanel is null ||
-            PluginSettingsPanel is null)
+            PluginSettingsPanel is null ||
+            PluginMarketSettingsPanel is null)
         {
             return;
         }
 
-        var selectedIndex = SettingsNavListBox.SelectedIndex;
-        WallpaperSettingsPanel.IsVisible = selectedIndex == 0;
-        GridSettingsPanel.IsVisible = selectedIndex == 1;
-        ColorSettingsPanel.IsVisible = selectedIndex == 2;
-        StatusBarSettingsPanel.IsVisible = selectedIndex == 3;
-        WeatherSettingsPanel.IsVisible = selectedIndex == 4;
-        RegionSettingsPanel.IsVisible = selectedIndex == 5;
-        UpdateSettingsPanel.IsVisible = selectedIndex == 6;
-        AboutSettingsPanel.IsVisible = selectedIndex == 7;
-        LauncherSettingsPanel.IsVisible = selectedIndex == 8;
-        PluginSettingsPanel.IsVisible = selectedIndex == 9;
+        var selectedItem = SettingsNavView.SelectedItem as FluentAvalonia.UI.Controls.NavigationViewItem;
+        var tag = selectedItem?.Tag?.ToString();
 
-        if (selectedIndex == 8)
+        WallpaperSettingsPanel.IsVisible = tag == "Wallpaper";
+        GridSettingsPanel.IsVisible = tag == "Grid";
+        ColorSettingsPanel.IsVisible = tag == "Color";
+        StatusBarSettingsPanel.IsVisible = tag == "StatusBar";
+        WeatherSettingsPanel.IsVisible = tag == "Weather";
+        RegionSettingsPanel.IsVisible = tag == "Region";
+        UpdateSettingsPanel.IsVisible = tag == "Update";
+        AboutSettingsPanel.IsVisible = tag == "About";
+        LauncherSettingsPanel.IsVisible = tag == "Launcher";
+        PluginSettingsPanel.IsVisible = tag == "Plugins";
+        PluginMarketSettingsPanel.IsVisible = tag == "PluginMarket";
+        UpdatePluginSettingsPageVisibility(tag);
+
+        if (tag == "Launcher")
         {
             RenderLauncherHiddenItemsList();
         }
 
-        if (selectedIndex == 1)
+        if (tag == "Plugins")
+        {
+            PluginSettingsPanel.RefreshFromRuntime();
+        }
+
+        if (tag == "PluginMarket")
+        {
+            PluginMarketSettingsPanel.RefreshFromRuntime();
+        }
+
+        if (tag == "Grid")
         {
             UpdateGridPreviewLayout();
         }
@@ -864,47 +926,162 @@ public partial class MainWindow
             return;
         }
 
-        var snapshot = new AppSettingsSnapshot
+        _appSettingsService.Save(BuildAppSettingsSnapshot());
+        _desktopLayoutSettingsService.Save(BuildDesktopLayoutSettingsSnapshot());
+        _launcherSettingsService.Save(BuildLauncherSettingsSnapshot());
+
+    }
+
+    internal void ReloadFromPersistedSettings()
+    {
+        _suppressSettingsPersistence = true;
+        try
+        {
+            var snapshot = _appSettingsService.Load();
+            var desktopLayoutSnapshot = _desktopLayoutSettingsService.Load();
+            var launcherSnapshot = _launcherSettingsService.Load();
+
+            if (!string.IsNullOrWhiteSpace(snapshot.TimeZoneId))
+            {
+                _timeZoneService.SetTimeZoneById(snapshot.TimeZoneId);
+            }
+
+            _targetShortSideCells = Math.Clamp(
+                snapshot.GridShortSideCells > 0 ? snapshot.GridShortSideCells : CalculateDefaultShortSideCellCountFromDpi(),
+                MinShortSideCells,
+                MaxShortSideCells);
+
+            _gridSpacingPreset = NormalizeGridSpacingPreset(snapshot.GridSpacingPreset);
+            _suppressGridSpacingEvents = true;
+            GridSpacingPresetComboBox.SelectedIndex =
+                string.Equals(_gridSpacingPreset, "Compact", StringComparison.OrdinalIgnoreCase) ? 1 : 0;
+            _suppressGridSpacingEvents = false;
+
+            _desktopEdgeInsetPercent = Math.Clamp(snapshot.DesktopEdgeInsetPercent, MinEdgeInsetPercent, MaxEdgeInsetPercent);
+            _suppressGridInsetEvents = true;
+            GridEdgeInsetSlider.Value = _desktopEdgeInsetPercent;
+            GridEdgeInsetNumberBox.Value = _desktopEdgeInsetPercent;
+            _suppressGridInsetEvents = false;
+
+            _statusBarSpacingMode = NormalizeStatusBarSpacingMode(snapshot.StatusBarSpacingMode);
+            _statusBarCustomSpacingPercent = Math.Clamp(snapshot.StatusBarCustomSpacingPercent, 0, 30);
+            _suppressStatusBarSpacingEvents = true;
+            StatusBarSpacingModeComboBox.SelectedIndex = _statusBarSpacingMode switch
+            {
+                "Compact" => 0,
+                "Custom" => 2,
+                _ => 1
+            };
+            StatusBarSpacingSlider.Value = _statusBarCustomSpacingPercent;
+            StatusBarSpacingNumberBox.Value = _statusBarCustomSpacingPercent;
+            StatusBarSpacingCustomPanel.IsVisible = string.Equals(_statusBarSpacingMode, "Custom", StringComparison.OrdinalIgnoreCase);
+            _suppressStatusBarSpacingEvents = false;
+
+            GridSizeNumberBox.Value = _targetShortSideCells;
+            GridSizeSlider.Value = _targetShortSideCells;
+
+            RestoreSettingsTabSelection(snapshot);
+
+            UpdateSettingsTabContent();
+            WallpaperPlacementComboBox.SelectedIndex = GetPlacementIndexFromSetting(snapshot.WallpaperPlacement);
+            _defaultDesktopBackground = DesktopWallpaperLayer.Background;
+            ApplyTaskbarSettings(snapshot);
+            InitializeLocalization(snapshot.LanguageCode);
+            InitializeWeatherSettings(snapshot);
+            _ = _componentSettingsService.Load();
+            InitializeAutoStartWithWindowsSetting(snapshot);
+            InitializeAppRenderModeSetting(snapshot);
+            InitializeUpdateSettings(snapshot);
+            InitializeDesktopSurfaceState(desktopLayoutSnapshot);
+            InitializeLauncherVisibilitySettings(launcherSnapshot);
+            InitializeDesktopComponentPlacements(desktopLayoutSnapshot);
+            InitializeSettingsIcons();
+
+            TryRestoreWallpaper(snapshot.WallpaperPath);
+            ApplyWallpaperBrush();
+            UpdateWallpaperDisplay();
+
+            if (TryParseColor(snapshot.ThemeColor, out var savedThemeColor))
+            {
+                _selectedThemeColor = savedThemeColor;
+            }
+
+            _isNightMode = snapshot.IsNightMode ?? (CalculateCurrentBackgroundLuminance() < LightBackgroundLuminanceThreshold);
+            ApplyNightModeState(_isNightMode, refreshPalettes: true);
+            _suppressStatusBarToggleEvents = true;
+            StatusBarClockToggleSwitch.IsChecked = _topStatusComponentIds.Contains(BuiltInComponentIds.Clock);
+            _suppressStatusBarToggleEvents = false;
+            ApplyLocalization();
+            ThemeColorStatusTextBlock.Text = Lf("settings.color.theme_ready_format", "Theme color ready: {0}.", _selectedThemeColor);
+            RebuildDesktopGrid();
+            LoadLauncherEntriesAsync();
+            InitializeTimeZoneSettings();
+            ClockWidget.SetTimeZoneService(_timeZoneService);
+            UpdateWallpaperPreviewLayout();
+            UpdateGridPreviewLayout();
+            UpdateAdaptiveTextSystem();
+            ApplyTaskbarActionVisibility(GetCurrentTaskbarContext());
+        }
+        finally
+        {
+            _suppressSettingsPersistence = false;
+        }
+    }
+
+    private AppSettingsSnapshot BuildAppSettingsSnapshot()
+    {
+        var snapshot = _appSettingsService.Load();
+        snapshot.GridShortSideCells = _targetShortSideCells;
+        snapshot.GridSpacingPreset = _gridSpacingPreset;
+        snapshot.DesktopEdgeInsetPercent = _desktopEdgeInsetPercent;
+        snapshot.IsNightMode = _isNightMode;
+        snapshot.ThemeColor = _selectedThemeColor.ToString();
+        snapshot.WallpaperPath = _wallpaperPath;
+        snapshot.WallpaperPlacement = GetPlacementDisplayName(GetSelectedWallpaperPlacement());
+        snapshot.SettingsTabIndex = Math.Max(0, GetSettingsTabIndex());
+        snapshot.SettingsTabTag = GetSelectedSettingsTabTag();
+        snapshot.LanguageCode = _languageCode;
+        snapshot.TimeZoneId = _timeZoneService.CurrentTimeZone.Id;
+        snapshot.WeatherLocationMode = ToWeatherLocationModeTag(_weatherLocationMode);
+        snapshot.WeatherLocationKey = _weatherLocationKey;
+        snapshot.WeatherLocationName = _weatherLocationName;
+        snapshot.WeatherLatitude = _weatherLatitude;
+        snapshot.WeatherLongitude = _weatherLongitude;
+        snapshot.WeatherAutoRefreshLocation = _weatherAutoRefreshLocation;
+        snapshot.WeatherLocationQuery = BuildLegacyWeatherLocationQuery();
+        snapshot.WeatherExcludedAlerts = _weatherExcludedAlertsRaw;
+        snapshot.WeatherIconPackId = _weatherIconPackId;
+        snapshot.WeatherNoTlsRequests = _weatherNoTlsRequests;
+        snapshot.AutoStartWithWindows = _autoStartWithWindows;
+        snapshot.AppRenderMode = _selectedAppRenderMode;
+        snapshot.AutoCheckUpdates = _autoCheckUpdates;
+        snapshot.IncludePrereleaseUpdates = IncludePrereleaseUpdates;
+        snapshot.UpdateChannel = IncludePrereleaseUpdates ? UpdateChannelPreview : UpdateChannelStable;
+        snapshot.TopStatusComponentIds = _topStatusComponentIds.ToList();
+        snapshot.PinnedTaskbarActions = _pinnedTaskbarActions.Select(action => action.ToString()).ToList();
+        snapshot.EnableDynamicTaskbarActions = _enableDynamicTaskbarActions;
+        snapshot.TaskbarLayoutMode = _taskbarLayoutMode;
+        snapshot.ClockDisplayFormat = _clockDisplayFormat == ClockDisplayFormat.HourMinute ? "HourMinute" : "HourMinuteSecond";
+        snapshot.StatusBarSpacingMode = _statusBarSpacingMode;
+        snapshot.StatusBarCustomSpacingPercent = _statusBarCustomSpacingPercent;
+        return snapshot;
+    }
+    private DesktopLayoutSettingsSnapshot BuildDesktopLayoutSettingsSnapshot()
+    {
+        return new DesktopLayoutSettingsSnapshot
         {
-            GridShortSideCells = _targetShortSideCells,
-            GridSpacingPreset = _gridSpacingPreset,
-            DesktopEdgeInsetPercent = _desktopEdgeInsetPercent,
-            IsNightMode = _isNightMode,
-            ThemeColor = _selectedThemeColor.ToString(),
-            WallpaperPath = _wallpaperPath,
-            WallpaperPlacement = GetPlacementDisplayName(GetSelectedWallpaperPlacement()),
-            SettingsTabIndex = Math.Max(0, SettingsNavListBox?.SelectedIndex ?? 0),
-            LanguageCode = _languageCode,
-            TimeZoneId = _timeZoneService.CurrentTimeZone.Id,
-            WeatherLocationMode = ToWeatherLocationModeTag(_weatherLocationMode),
-            WeatherLocationKey = _weatherLocationKey,
-            WeatherLocationName = _weatherLocationName,
-            WeatherLatitude = _weatherLatitude,
-            WeatherLongitude = _weatherLongitude,
-            WeatherAutoRefreshLocation = _weatherAutoRefreshLocation,
-            WeatherLocationQuery = BuildLegacyWeatherLocationQuery(),
-            WeatherExcludedAlerts = _weatherExcludedAlertsRaw,
-            WeatherIconPackId = _weatherIconPackId,
-            WeatherNoTlsRequests = _weatherNoTlsRequests,
-            AutoStartWithWindows = _autoStartWithWindows,
-            AutoCheckUpdates = _autoCheckUpdates,
-            IncludePrereleaseUpdates = IncludePrereleaseUpdates,
-            UpdateChannel = IncludePrereleaseUpdates ? "Preview" : "Stable",
-            TopStatusComponentIds = _topStatusComponentIds.ToList(),
-            PinnedTaskbarActions = _pinnedTaskbarActions.Select(action => action.ToString()).ToList(),
-            EnableDynamicTaskbarActions = _enableDynamicTaskbarActions,
-            TaskbarLayoutMode = _taskbarLayoutMode,
-            ClockDisplayFormat = _clockDisplayFormat == ClockDisplayFormat.HourMinute ? "HourMinute" : "HourMinuteSecond",
-            StatusBarSpacingMode = _statusBarSpacingMode,
-            StatusBarCustomSpacingPercent = _statusBarCustomSpacingPercent,
             DesktopPageCount = _desktopPageCount,
             CurrentDesktopSurfaceIndex = _currentDesktopSurfaceIndex,
-            DesktopComponentPlacements = _desktopComponentPlacements.ToList(),
+            DesktopComponentPlacements = _desktopComponentPlacements.ToList()
+        };
+    }
+    private LauncherSettingsSnapshot BuildLauncherSettingsSnapshot()
+    {
+        return new LauncherSettingsSnapshot
+        {
             HiddenLauncherFolderPaths = _hiddenLauncherFolderPaths.OrderBy(path => path, StringComparer.OrdinalIgnoreCase).ToList(),
             HiddenLauncherAppPaths = _hiddenLauncherAppPaths.OrderBy(path => path, StringComparer.OrdinalIgnoreCase).ToList()
         };
-
-        _appSettingsService.Save(snapshot);
     }
 
     private IDisposable? _persistSettingsDebounceTimer;
@@ -1057,6 +1234,61 @@ public partial class MainWindow
         }
     }
 
+    private void InitializeAppRenderModeSetting(AppSettingsSnapshot snapshot)
+    {
+        _selectedAppRenderMode = AppRenderingModeHelper.Normalize(snapshot.AppRenderMode);
+        _runningAppRenderMode = ResolveActiveAppRenderModeForUi(_selectedAppRenderMode);
+        var renderModeForUi = PendingRestartStateService.HasPendingReason(PendingRestartStateService.RenderModeReason)
+            ? _selectedAppRenderMode
+            : _runningAppRenderMode;
+
+        if (AppRenderModeComboBox is null)
+        {
+            return;
+        }
+
+        _suppressAppRenderModeSelectionEvents = true;
+        try
+        {
+            AppRenderModeComboBox.IsEnabled = OperatingSystem.IsWindows();
+            SelectAppRenderModeInUi(renderModeForUi);
+        }
+        finally
+        {
+            _suppressAppRenderModeSelectionEvents = false;
+        }
+    }
+
+    private void SelectAppRenderModeInUi(string renderMode)
+    {
+        if (AppRenderModeComboBox is null)
+        {
+            return;
+        }
+
+        AppRenderModeComboBox.SelectedIndex = GetAppRenderModeComboBoxIndex(renderMode);
+    }
+
+    private static int GetAppRenderModeComboBoxIndex(string renderMode)
+    {
+        return AppRenderingModeHelper.Normalize(renderMode) switch
+        {
+            AppRenderingModeHelper.Software => 1,
+            AppRenderingModeHelper.AngleEgl => 2,
+            AppRenderingModeHelper.Wgl => 3,
+            AppRenderingModeHelper.Vulkan => 4,
+            _ => 0
+        };
+    }
+
+    private static string ResolveActiveAppRenderModeForUi(string configuredRenderMode)
+    {
+        var detectedRenderMode = AppRenderBackendDiagnostics.Detect().ActualBackend;
+        return string.Equals(detectedRenderMode, AppRenderBackendDiagnostics.Unknown, StringComparison.Ordinal)
+            ? configuredRenderMode
+            : AppRenderingModeHelper.Normalize(detectedRenderMode);
+    }
+
     private static WeatherLocationMode ParseWeatherLocationMode(string? value)
     {
         return string.Equals(value, "Coordinates", StringComparison.OrdinalIgnoreCase)
@@ -1176,6 +1408,8 @@ public partial class MainWindow
         {
             WeatherCoordinateSettingsExpander.IsVisible = _weatherLocationMode == WeatherLocationMode.Coordinates;
         }
+
+        UpdateWeatherLocationSummaryCard();
     }
 
     private void OnWeatherLocationModeSelectionChanged(object? sender, SelectionChangedEventArgs e)
@@ -1324,6 +1558,33 @@ public partial class MainWindow
         PersistSettings();
     }
 
+    private void OnAppRenderModeSelectionChanged(object? sender, SelectionChangedEventArgs e)
+    {
+        if (_suppressAppRenderModeSelectionEvents || AppRenderModeComboBox is null)
+        {
+            return;
+        }
+
+        var selectedMode = AppRenderingModeHelper.Normalize(
+            TryGetSelectedComboBoxTag(AppRenderModeComboBox));
+
+        if (string.Equals(_selectedAppRenderMode, selectedMode, StringComparison.Ordinal))
+        {
+            return;
+        }
+
+        _selectedAppRenderMode = selectedMode;
+        PersistSettings();
+        var requiresRestart = !string.Equals(_runningAppRenderMode, selectedMode, StringComparison.Ordinal);
+        PendingRestartStateService.SetPending(PendingRestartStateService.RenderModeReason, requiresRestart);
+        UpdatePendingRestartDock();
+
+        if (requiresRestart)
+        {
+            _ = ShowRenderModeRestartPromptAsync(selectedMode);
+        }
+    }
+
     private async void OnSearchWeatherCityClick(object? sender, RoutedEventArgs e)
     {
         if (_isWeatherSearchInProgress || WeatherCitySearchTextBox is null || WeatherCityResultsComboBox is null)
@@ -1632,7 +1893,7 @@ public partial class MainWindow
             var weather = snapshot.Current.WeatherText ??
                           L("settings.weather.preview_unknown", "Unknown");
             var temperature = snapshot.Current.TemperatureC.HasValue
-                ? string.Create(CultureInfo.InvariantCulture, $"{snapshot.Current.TemperatureC.Value:F1} C")
+                ? FormatWeatherPreviewTemperature(snapshot.Current.TemperatureC.Value)
                 : "--";
             var updatedAt = snapshot.ObservationTime ?? snapshot.FetchedAt;
 
@@ -1675,6 +1936,14 @@ public partial class MainWindow
 
     private void UpdateWeatherPreviewSummary(int? weatherCode, string temperatureText, DateTimeOffset? updatedAt)
     {
+        if (WeatherPreviewIconImage is not null)
+        {
+            var kind = HyperOS3WeatherTheme.ResolveVisualKind(weatherCode, _isNightMode);
+            WeatherPreviewIconImage.Source = HyperOS3WeatherAssetLoader.LoadImage(
+                HyperOS3WeatherTheme.ResolveIconAsset(kind)) ??
+                HyperOS3WeatherAssetLoader.LoadImage(HyperOS3WeatherTheme.ResolveHeroIconAsset(kind));
+        }
+
         if (WeatherPreviewIconSymbol is not null)
         {
             WeatherPreviewIconSymbol.Symbol = ResolveWeatherPreviewSymbol(weatherCode, _isNightMode);
@@ -1694,10 +1963,15 @@ public partial class MainWindow
         }
 
         WeatherPreviewUpdatedTextBlock.Text = updatedAt.HasValue
-            ? Lf("weather.widget.updated_format", "Updated {0:HH:mm}", updatedAt.Value.LocalDateTime)
+            ? updatedAt.Value.LocalDateTime.ToString("yyyy/M/d HH:mm:ss", CultureInfo.InvariantCulture)
             : "-";
     }
 
+    private static string FormatWeatherPreviewTemperature(double temperatureC)
+    {
+        return string.Create(CultureInfo.InvariantCulture, $"{temperatureC:0.#}°C");
+    }
+
     private static Symbol ResolveWeatherPreviewSymbol(int? weatherCode, bool isNight)
     {
         return weatherCode switch
@@ -1713,6 +1987,38 @@ public partial class MainWindow
         };
     }
 
+    private void UpdateWeatherLocationSummaryCard()
+    {
+        if (WeatherLocationSelectionTitleTextBlock is null ||
+            WeatherLocationSelectionDescriptionTextBlock is null ||
+            WeatherLocationValueTextBlock is null)
+        {
+            return;
+        }
+
+        if (_weatherLocationMode == WeatherLocationMode.Coordinates)
+        {
+            WeatherLocationSelectionTitleTextBlock.Text = L("settings.weather.coordinates_selection_label", "Coordinate Location");
+            WeatherLocationSelectionDescriptionTextBlock.Text = L(
+                "settings.weather.location_coordinates_summary_desc",
+                "Set latitude/longitude and optional location name used for weather queries.");
+            WeatherLocationValueTextBlock.Text = string.IsNullOrWhiteSpace(_weatherLocationName)
+                ? string.Create(CultureInfo.InvariantCulture, $"{_weatherLatitude:F4}, {_weatherLongitude:F4}")
+                : _weatherLocationName;
+            return;
+        }
+
+        WeatherLocationSelectionTitleTextBlock.Text = L("settings.weather.city_selection_label", "City Selection");
+        WeatherLocationSelectionDescriptionTextBlock.Text = L(
+            "settings.weather.location_city_summary_desc",
+            "Select the current city used for weather queries.");
+        WeatherLocationValueTextBlock.Text = !string.IsNullOrWhiteSpace(_weatherLocationName)
+            ? _weatherLocationName
+            : !string.IsNullOrWhiteSpace(_weatherLocationKey)
+                ? _weatherLocationKey
+                : L("settings.weather.location_not_selected", "No location selected");
+    }
+
     private void SetWeatherSearchBusy(bool isBusy)
     {
         if (WeatherSearchButton is not null)
@@ -1753,7 +2059,7 @@ public partial class MainWindow
             : CalculateCurrentBackgroundLuminance() >= LightBackgroundLuminanceThreshold;
         var isLightNavBackground = _isSettingsOpen
             ? !_isNightMode
-            : CalculateBrushLuminance(SettingsNavPanelBorder?.Background) >= LightBackgroundLuminanceThreshold;
+            : CalculateBrushLuminance(SettingsNavView?.Background) >= LightBackgroundLuminanceThreshold;
         var context = new ThemeColorContext(
             _selectedThemeColor,
             isLightBackground,
@@ -2287,5 +2593,222 @@ public partial class MainWindow
             IconVariant = IconVariant.Regular
         };
     }
+
+    // ========================================================================
+    // --- UserControl Forwarding Properties (Definitive Catch-All List) ---
+    // These properties allow legacy code in MainWindow.axaml.cs and other partials
+    // to access controls that have been moved into independent UserControls.
+    // ========================================================================
+
+    // --- WallpaperSettingsPage ---
+    internal TextBlock WallpaperPanelTitleTextBlock => WallpaperSettingsPanel.FindControl<TextBlock>("WallpaperPanelTitleTextBlock")!;
+    internal TextBlock WallpaperPathTextBlock => WallpaperSettingsPanel.FindControl<TextBlock>("WallpaperPathTextBlock")!;
+    internal TextBlock WallpaperStatusTextBlock => WallpaperSettingsPanel.FindControl<TextBlock>("WallpaperStatusTextBlock")!;
+    internal ComboBox WallpaperPlacementComboBox => WallpaperSettingsPanel.FindControl<ComboBox>("WallpaperPlacementComboBox")!;
+    internal Border WallpaperPreviewHost => WallpaperSettingsPanel.FindControl<Border>("WallpaperPreviewHost")!;
+    internal Border WallpaperPreviewFrame => WallpaperSettingsPanel.FindControl<Border>("WallpaperPreviewFrame")!;
+    internal Border WallpaperPreviewViewport => WallpaperSettingsPanel.FindControl<Border>("WallpaperPreviewViewport")!;
+    internal LibVLCSharp.Avalonia.VideoView? WallpaperPreviewVideoView => WallpaperSettingsPanel.FindControl<LibVLCSharp.Avalonia.VideoView>("WallpaperPreviewVideoView");
+    internal Grid WallpaperPreviewGrid => WallpaperSettingsPanel.FindControl<Grid>("WallpaperPreviewGrid")!;
+    internal Border WallpaperPreviewTopStatusBarHost => WallpaperSettingsPanel.FindControl<Border>("WallpaperPreviewTopStatusBarHost")!;
+    internal StackPanel WallpaperPreviewTopStatusComponentsPanel => WallpaperSettingsPanel.FindControl<StackPanel>("WallpaperPreviewTopStatusComponentsPanel")!;
+    internal LanMountainDesktop.Views.Components.ClockWidget WallpaperPreviewClockWidget => WallpaperSettingsPanel.FindControl<LanMountainDesktop.Views.Components.ClockWidget>("WallpaperPreviewClockWidget")!;
+    internal Border WallpaperPreviewBottomTaskbarContainer => WallpaperSettingsPanel.FindControl<Border>("WallpaperPreviewBottomTaskbarContainer")!;
+    internal Border WallpaperPreviewTaskbarFixedActionsHost => WallpaperSettingsPanel.FindControl<Border>("WallpaperPreviewTaskbarFixedActionsHost")!;
+    internal StackPanel WallpaperPreviewBackButtonVisual => WallpaperSettingsPanel.FindControl<StackPanel>("WallpaperPreviewBackButtonVisual")!;
+    internal TextBlock WallpaperPreviewBackButtonTextBlock => WallpaperSettingsPanel.FindControl<TextBlock>("WallpaperPreviewBackButtonTextBlock")!;
+    internal StackPanel WallpaperPreviewTaskbarDynamicActionsHost => WallpaperSettingsPanel.FindControl<StackPanel>("WallpaperPreviewTaskbarDynamicActionsHost")!;
+    internal Border WallpaperPreviewTaskbarSettingsActionHost => WallpaperSettingsPanel.FindControl<Border>("WallpaperPreviewTaskbarSettingsActionHost")!;
+    internal StackPanel WallpaperPreviewComponentLibraryVisual => WallpaperSettingsPanel.FindControl<StackPanel>("WallpaperPreviewComponentLibraryVisual")!;
+    internal TextBlock WallpaperPreviewComponentLibraryTextBlock => WallpaperSettingsPanel.FindControl<TextBlock>("WallpaperPreviewComponentLibraryTextBlock")!;
+    internal FluentIcons.Avalonia.SymbolIcon WallpaperPreviewSettingsButtonIcon => WallpaperSettingsPanel.FindControl<FluentIcons.Avalonia.SymbolIcon>("WallpaperPreviewSettingsButtonIcon")!;
+    internal Button PickWallpaperButton => WallpaperSettingsPanel.FindControl<Button>("PickWallpaperButton")!;
+    internal Button ClearWallpaperButton => WallpaperSettingsPanel.FindControl<Button>("ClearWallpaperButton")!;
+    internal FluentAvalonia.UI.Controls.SettingsExpander WallpaperPlacementSettingsExpander => WallpaperSettingsPanel.FindControl<FluentAvalonia.UI.Controls.SettingsExpander>("WallpaperPlacementSettingsExpander")!;
+
+    // --- GridSettingsPage ---
+    internal TextBlock GridPanelTitleTextBlock => GridSettingsPanel.FindControl<TextBlock>("GridPanelTitleTextBlock")!;
+    internal Border GridPreviewHost => GridSettingsPanel.FindControl<Border>("GridPreviewHost")!;
+    internal Border GridPreviewFrame => GridSettingsPanel.FindControl<Border>("GridPreviewFrame")!;
+    internal Border GridPreviewViewport => GridSettingsPanel.FindControl<Border>("GridPreviewViewport")!;
+    internal Canvas GridPreviewLinesCanvas => GridSettingsPanel.FindControl<Canvas>("GridPreviewLinesCanvas")!;
+    internal Grid GridPreviewGrid => GridSettingsPanel.FindControl<Grid>("GridPreviewGrid")!;
+    internal Border GridPreviewTopStatusBarHost => GridSettingsPanel.FindControl<Border>("GridPreviewTopStatusBarHost")!;
+    internal StackPanel GridPreviewTopStatusComponentsPanel => GridSettingsPanel.FindControl<StackPanel>("GridPreviewTopStatusComponentsPanel")!;
+    internal Border GridPreviewBottomTaskbarContainer => GridSettingsPanel.FindControl<Border>("GridPreviewBottomTaskbarContainer")!;
+    internal Border GridPreviewTaskbarFixedActionsHost => GridSettingsPanel.FindControl<Border>("GridPreviewTaskbarFixedActionsHost")!;
+    internal StackPanel GridPreviewBackButtonVisual => GridSettingsPanel.FindControl<StackPanel>("GridPreviewBackButtonVisual")!;
+    internal TextBlock GridPreviewBackButtonTextBlock => GridSettingsPanel.FindControl<TextBlock>("GridPreviewBackButtonTextBlock")!;
+    internal StackPanel GridPreviewTaskbarDynamicActionsHost => GridSettingsPanel.FindControl<StackPanel>("GridPreviewTaskbarDynamicActionsHost")!;
+    internal Border GridPreviewTaskbarSettingsActionHost => GridSettingsPanel.FindControl<Border>("GridPreviewTaskbarSettingsActionHost")!;
+    internal StackPanel GridPreviewComponentLibraryVisual => GridSettingsPanel.FindControl<StackPanel>("GridPreviewComponentLibraryVisual")!;
+    internal FluentIcons.Avalonia.FluentIcon GridPreviewComponentLibraryIcon => GridSettingsPanel.FindControl<FluentIcons.Avalonia.FluentIcon>("GridPreviewComponentLibraryIcon")!;
+    internal TextBlock GridPreviewComponentLibraryTextBlock => GridSettingsPanel.FindControl<TextBlock>("GridPreviewComponentLibraryTextBlock")!;
+    internal FluentIcons.Avalonia.SymbolIcon GridPreviewSettingsButtonIcon => GridSettingsPanel.FindControl<FluentIcons.Avalonia.SymbolIcon>("GridPreviewSettingsButtonIcon")!;
+    internal FluentAvalonia.UI.Controls.SettingsExpander GridRowsSettingsExpander => GridSettingsPanel.FindControl<FluentAvalonia.UI.Controls.SettingsExpander>("GridRowsSettingsExpander")!;
+    internal FluentAvalonia.UI.Controls.SettingsExpander GridSpacingSettingsExpander => GridSettingsPanel.FindControl<FluentAvalonia.UI.Controls.SettingsExpander>("GridSpacingSettingsExpander")!;
+    internal FluentAvalonia.UI.Controls.SettingsExpander GridEdgeInsetSettingsExpander => GridSettingsPanel.FindControl<FluentAvalonia.UI.Controls.SettingsExpander>("GridEdgeInsetSettingsExpander")!;
+    internal Slider GridSizeSlider => GridSettingsPanel.FindControl<Slider>("GridSizeSlider")!;
+    internal FluentAvalonia.UI.Controls.NumberBox GridSizeNumberBox => GridSettingsPanel.FindControl<FluentAvalonia.UI.Controls.NumberBox>("GridSizeNumberBox")!;
+    internal ComboBox GridSpacingPresetComboBox => GridSettingsPanel.FindControl<ComboBox>("GridSpacingPresetComboBox")!;
+    internal ComboBoxItem GridSpacingRelaxedComboBoxItem => GridSettingsPanel.FindControl<ComboBoxItem>("GridSpacingRelaxedComboBoxItem")!;
+    internal ComboBoxItem GridSpacingCompactComboBoxItem => GridSettingsPanel.FindControl<ComboBoxItem>("GridSpacingCompactComboBoxItem")!;
+    internal Slider GridEdgeInsetSlider => GridSettingsPanel.FindControl<Slider>("GridEdgeInsetSlider")!;
+    internal FluentAvalonia.UI.Controls.NumberBox GridEdgeInsetNumberBox => GridSettingsPanel.FindControl<FluentAvalonia.UI.Controls.NumberBox>("GridEdgeInsetNumberBox")!;
+    internal TextBlock GridEdgeInsetComputedPxTextBlock => GridSettingsPanel.FindControl<TextBlock>("GridEdgeInsetComputedPxTextBlock")!;
+    internal Button ApplyGridButton => GridSettingsPanel.FindControl<Button>("ApplyGridButton")!;
+    internal TextBlock GridInfoTextBlock => GridSettingsPanel.FindControl<TextBlock>("GridInfoTextBlock")!;
+
+    // --- ColorSettingsPage ---
+    internal TextBlock ColorPanelTitleTextBlock => ColorSettingsPanel.FindControl<TextBlock>("ColorPanelTitleTextBlock")!;
+    internal FluentAvalonia.UI.Controls.SettingsExpander ThemeModeSettingsExpander => ColorSettingsPanel.FindControl<FluentAvalonia.UI.Controls.SettingsExpander>("ThemeModeSettingsExpander")!;
+    internal FluentAvalonia.UI.Controls.SettingsExpander ThemeColorSettingsExpander => ColorSettingsPanel.FindControl<FluentAvalonia.UI.Controls.SettingsExpander>("ThemeColorSettingsExpander")!;
+    internal ToggleSwitch NightModeToggleSwitch => ColorSettingsPanel.FindControl<ToggleSwitch>("NightModeToggleSwitch")!;
+    internal TextBlock ThemeColorStatusTextBlock => ColorSettingsPanel.FindControl<TextBlock>("ThemeColorStatusTextBlock")!;
+    internal TextBlock RecommendedColorsLabelTextBlock => ColorSettingsPanel.FindControl<TextBlock>("RecommendedColorsLabelTextBlock")!;
+    internal TextBlock SystemMonetColorsLabelTextBlock => ColorSettingsPanel.FindControl<TextBlock>("SystemMonetColorsLabelTextBlock")!;
+    internal Button RecommendedColorButton1 => ColorSettingsPanel.FindControl<Button>("RecommendedColorButton1")!;
+    internal Button RecommendedColorButton2 => ColorSettingsPanel.FindControl<Button>("RecommendedColorButton2")!;
+    internal Button RecommendedColorButton3 => ColorSettingsPanel.FindControl<Button>("RecommendedColorButton3")!;
+    internal Button RecommendedColorButton4 => ColorSettingsPanel.FindControl<Button>("RecommendedColorButton4")!;
+    internal Button RecommendedColorButton5 => ColorSettingsPanel.FindControl<Button>("RecommendedColorButton5")!;
+    internal Button RecommendedColorButton6 => ColorSettingsPanel.FindControl<Button>("RecommendedColorButton6")!;
+    internal Border RecommendedColorSwatch1 => ColorSettingsPanel.FindControl<Border>("RecommendedColorSwatch1")!;
+    internal Border RecommendedColorSwatch2 => ColorSettingsPanel.FindControl<Border>("RecommendedColorSwatch2")!;
+    internal Border RecommendedColorSwatch3 => ColorSettingsPanel.FindControl<Border>("RecommendedColorSwatch3")!;
+    internal Border RecommendedColorSwatch4 => ColorSettingsPanel.FindControl<Border>("RecommendedColorSwatch4")!;
+    internal Border RecommendedColorSwatch5 => ColorSettingsPanel.FindControl<Border>("RecommendedColorSwatch5")!;
+    internal Border RecommendedColorSwatch6 => ColorSettingsPanel.FindControl<Border>("RecommendedColorSwatch6")!;
+    internal Button RefreshMonetColorsButton => ColorSettingsPanel.FindControl<Button>("RefreshMonetColorsButton")!;
+    internal Button MonetColorButton1 => ColorSettingsPanel.FindControl<Button>("MonetColorButton1")!;
+    internal Button MonetColorButton2 => ColorSettingsPanel.FindControl<Button>("MonetColorButton2")!;
+    internal Button MonetColorButton3 => ColorSettingsPanel.FindControl<Button>("MonetColorButton3")!;
+    internal Button MonetColorButton4 => ColorSettingsPanel.FindControl<Button>("MonetColorButton4")!;
+    internal Button MonetColorButton5 => ColorSettingsPanel.FindControl<Button>("MonetColorButton5")!;
+    internal Button MonetColorButton6 => ColorSettingsPanel.FindControl<Button>("MonetColorButton6")!;
+    internal Border MonetColorSwatch1 => ColorSettingsPanel.FindControl<Border>("MonetColorSwatch1")!;
+    internal Border MonetColorSwatch2 => ColorSettingsPanel.FindControl<Border>("MonetColorSwatch2")!;
+    internal Border MonetColorSwatch3 => ColorSettingsPanel.FindControl<Border>("MonetColorSwatch3")!;
+    internal Border MonetColorSwatch4 => ColorSettingsPanel.FindControl<Border>("MonetColorSwatch4")!;
+    internal Border MonetColorSwatch5 => ColorSettingsPanel.FindControl<Border>("MonetColorSwatch5")!;
+    internal Border MonetColorSwatch6 => ColorSettingsPanel.FindControl<Border>("MonetColorSwatch6")!;
+
+    // --- StatusBarSettingsPage ---
+    internal TextBlock StatusBarPanelTitleTextBlock => StatusBarSettingsPanel.FindControl<TextBlock>("StatusBarPanelTitleTextBlock")!;
+    internal FluentAvalonia.UI.Controls.SettingsExpander StatusBarClockSettingsExpander => StatusBarSettingsPanel.FindControl<FluentAvalonia.UI.Controls.SettingsExpander>("StatusBarClockSettingsExpander")!;
+    internal FluentAvalonia.UI.Controls.SettingsExpander StatusBarSpacingSettingsExpander => StatusBarSettingsPanel.FindControl<FluentAvalonia.UI.Controls.SettingsExpander>("StatusBarSpacingSettingsExpander")!;
+    internal ToggleSwitch StatusBarClockToggleSwitch => StatusBarSettingsPanel.FindControl<ToggleSwitch>("StatusBarClockToggleSwitch")!;
+    internal RadioButton ClockFormatHMSSRadio => StatusBarSettingsPanel.FindControl<RadioButton>("ClockFormatHMSSRadio")!;
+    internal RadioButton ClockFormatHMRadio => StatusBarSettingsPanel.FindControl<RadioButton>("ClockFormatHMRadio")!;
+    internal ComboBox StatusBarSpacingModeComboBox => StatusBarSettingsPanel.FindControl<ComboBox>("StatusBarSpacingModeComboBox")!;
+    internal ComboBoxItem StatusBarSpacingModeCompactItem => StatusBarSettingsPanel.FindControl<ComboBoxItem>("StatusBarSpacingModeCompactItem")!;
+    internal ComboBoxItem StatusBarSpacingModeRelaxedItem => StatusBarSettingsPanel.FindControl<ComboBoxItem>("StatusBarSpacingModeRelaxedItem")!;
+    internal ComboBoxItem StatusBarSpacingModeCustomItem => StatusBarSettingsPanel.FindControl<ComboBoxItem>("StatusBarSpacingModeCustomItem")!;
+    internal FluentAvalonia.UI.Controls.SettingsExpanderItem StatusBarSpacingCustomPanel => StatusBarSettingsPanel.FindControl<FluentAvalonia.UI.Controls.SettingsExpanderItem>("StatusBarSpacingCustomPanel")!;
+    internal Slider StatusBarSpacingSlider => StatusBarSettingsPanel.FindControl<Slider>("StatusBarSpacingSlider")!;
+    internal FluentAvalonia.UI.Controls.NumberBox StatusBarSpacingNumberBox => StatusBarSettingsPanel.FindControl<FluentAvalonia.UI.Controls.NumberBox>("StatusBarSpacingNumberBox")!;
+    internal TextBlock StatusBarSpacingComputedPxTextBlock => StatusBarSettingsPanel.FindControl<TextBlock>("StatusBarSpacingComputedPxTextBlock")!;
+
+    // --- RegionSettingsPage ---
+    internal TextBlock RegionPanelTitleTextBlock => RegionSettingsPanel.FindControl<TextBlock>("RegionPanelTitleTextBlock")!;
+    internal FluentAvalonia.UI.Controls.SettingsExpander LanguageSettingsExpander => RegionSettingsPanel.FindControl<FluentAvalonia.UI.Controls.SettingsExpander>("LanguageSettingsExpander")!;
+    internal FluentAvalonia.UI.Controls.SettingsExpander TimeZoneSettingsExpander => RegionSettingsPanel.FindControl<FluentAvalonia.UI.Controls.SettingsExpander>("TimeZoneSettingsExpander")!;
+    internal ComboBox LanguageComboBox => RegionSettingsPanel.FindControl<ComboBox>("LanguageComboBox")!;
+    internal ComboBoxItem LanguageChineseItem => RegionSettingsPanel.FindControl<ComboBoxItem>("LanguageChineseItem")!;
+    internal ComboBoxItem LanguageEnglishItem => RegionSettingsPanel.FindControl<ComboBoxItem>("LanguageEnglishItem")!;
+    internal ComboBox TimeZoneComboBox => RegionSettingsPanel.FindControl<ComboBox>("TimeZoneComboBox")!;
+
+    // --- WeatherSettingsPage ---
+    internal TextBlock WeatherPanelTitleTextBlock => WeatherSettingsPanel.FindControl<TextBlock>("WeatherPanelTitleTextBlock")!;
+    internal TextBlock WeatherPreviewSectionTextBlock => WeatherSettingsPanel.FindControl<TextBlock>("WeatherPreviewSectionTextBlock")!;
+    internal TextBlock WeatherSettingsSectionTextBlock => WeatherSettingsPanel.FindControl<TextBlock>("WeatherSettingsSectionTextBlock")!;
+    internal FluentAvalonia.UI.Controls.SettingsExpander WeatherPreviewSettingsExpander => WeatherSettingsPanel.FindControl<FluentAvalonia.UI.Controls.SettingsExpander>("WeatherPreviewSettingsExpander")!;
+    internal FluentAvalonia.UI.Controls.SettingsExpander WeatherLocationSettingsExpander => WeatherSettingsPanel.FindControl<FluentAvalonia.UI.Controls.SettingsExpander>("WeatherLocationSettingsExpander")!;
+    internal FluentAvalonia.UI.Controls.SettingsExpander WeatherCitySearchSettingsExpander => WeatherSettingsPanel.FindControl<FluentAvalonia.UI.Controls.SettingsExpander>("WeatherCitySearchSettingsExpander")!;
+    internal FluentAvalonia.UI.Controls.SettingsExpander WeatherCoordinateSettingsExpander => WeatherSettingsPanel.FindControl<FluentAvalonia.UI.Controls.SettingsExpander>("WeatherCoordinateSettingsExpander")!;
+    internal FluentAvalonia.UI.Controls.SettingsExpander WeatherAlertFilterSettingsExpander => WeatherSettingsPanel.FindControl<FluentAvalonia.UI.Controls.SettingsExpander>("WeatherAlertFilterSettingsExpander")!;
+    internal FluentAvalonia.UI.Controls.SettingsExpander WeatherIconPackSettingsExpander => WeatherSettingsPanel.FindControl<FluentAvalonia.UI.Controls.SettingsExpander>("WeatherIconPackSettingsExpander")!;
+    internal FluentAvalonia.UI.Controls.SettingsExpander WeatherNoTlsSettingsExpander => WeatherSettingsPanel.FindControl<FluentAvalonia.UI.Controls.SettingsExpander>("WeatherNoTlsSettingsExpander")!;
+    internal Button WeatherPreviewButton => WeatherSettingsPanel.FindControl<Button>("WeatherPreviewButton")!;
+    internal ComboBox WeatherLocationModeComboBox => WeatherSettingsPanel.FindControl<ComboBox>("WeatherLocationModeComboBox")!;
+    internal ComboBoxItem WeatherLocationModeCityItem => WeatherSettingsPanel.FindControl<ComboBoxItem>("WeatherLocationModeCityItem")!;
+    internal ComboBoxItem WeatherLocationModeCoordinatesItem => WeatherSettingsPanel.FindControl<ComboBoxItem>("WeatherLocationModeCoordinatesItem")!;
+    internal ListBoxItem WeatherLocationModeCityChipItem => WeatherSettingsPanel.FindControl<ListBoxItem>("WeatherLocationModeCityChipItem")!;
+    internal ListBoxItem WeatherLocationModeCoordinatesChipItem => WeatherSettingsPanel.FindControl<ListBoxItem>("WeatherLocationModeCoordinatesChipItem")!;
+    internal ListBox WeatherLocationModeChipListBox => WeatherSettingsPanel.FindControl<ListBox>("WeatherLocationModeChipListBox")!;
+    internal ToggleSwitch WeatherAutoRefreshToggleSwitch => WeatherSettingsPanel.FindControl<ToggleSwitch>("WeatherAutoRefreshToggleSwitch")!;
+    internal Button WeatherSearchButton => WeatherSettingsPanel.FindControl<Button>("WeatherSearchButton")!;
+    internal Button WeatherApplyCityButton => WeatherSettingsPanel.FindControl<Button>("WeatherApplyCityButton")!;
+    internal Button WeatherApplyCoordinatesButton => WeatherSettingsPanel.FindControl<Button>("WeatherApplyCoordinatesButton")!;
+    internal TextBox WeatherExcludedAlertsTextBox => WeatherSettingsPanel.FindControl<TextBox>("WeatherExcludedAlertsTextBox")!;
+    internal ComboBox WeatherIconPackComboBox => WeatherSettingsPanel.FindControl<ComboBox>("WeatherIconPackComboBox")!;
+    internal ToggleSwitch WeatherNoTlsToggleSwitch => WeatherSettingsPanel.FindControl<ToggleSwitch>("WeatherNoTlsToggleSwitch")!;
+    internal TextBox WeatherCitySearchTextBox => WeatherSettingsPanel.FindControl<TextBox>("WeatherCitySearchTextBox")!;
+    internal ComboBox WeatherCityResultsComboBox => WeatherSettingsPanel.FindControl<ComboBox>("WeatherCityResultsComboBox")!;
+    internal TextBlock WeatherSearchStatusTextBlock => WeatherSettingsPanel.FindControl<TextBlock>("WeatherSearchStatusTextBlock")!;
+    internal TextBox WeatherLocationKeyTextBox => WeatherSettingsPanel.FindControl<TextBox>("WeatherLocationKeyTextBox")!;
+    internal TextBox WeatherLocationNameTextBox => WeatherSettingsPanel.FindControl<TextBox>("WeatherLocationNameTextBox")!;
+    internal FluentAvalonia.UI.Controls.NumberBox WeatherLatitudeNumberBox => WeatherSettingsPanel.FindControl<FluentAvalonia.UI.Controls.NumberBox>("WeatherLatitudeNumberBox")!;
+    internal FluentAvalonia.UI.Controls.NumberBox WeatherLongitudeNumberBox => WeatherSettingsPanel.FindControl<FluentAvalonia.UI.Controls.NumberBox>("WeatherLongitudeNumberBox")!;
+    internal TextBlock WeatherCoordinateStatusTextBlock => WeatherSettingsPanel.FindControl<TextBlock>("WeatherCoordinateStatusTextBlock")!;
+    internal TextBlock WeatherPreviewResultTextBlock => WeatherSettingsPanel.FindControl<TextBlock>("WeatherPreviewResultTextBlock")!;
+    internal Image WeatherPreviewIconImage => WeatherSettingsPanel.FindControl<Image>("WeatherPreviewIconImage")!;
+    internal FluentIcons.Avalonia.Fluent.SymbolIcon WeatherPreviewIconSymbol => WeatherSettingsPanel.FindControl<FluentIcons.Avalonia.Fluent.SymbolIcon>("WeatherPreviewIconSymbol")!;
+    internal TextBlock WeatherPreviewTemperatureTextBlock => WeatherSettingsPanel.FindControl<TextBlock>("WeatherPreviewTemperatureTextBlock")!;
+    internal TextBlock WeatherPreviewUpdatedTextBlock => WeatherSettingsPanel.FindControl<TextBlock>("WeatherPreviewUpdatedTextBlock")!;
+    internal FluentAvalonia.UI.Controls.ProgressRing WeatherSearchProgressRing => WeatherSettingsPanel.FindControl<FluentAvalonia.UI.Controls.ProgressRing>("WeatherSearchProgressRing")!;
+    internal FluentAvalonia.UI.Controls.ProgressRing WeatherPreviewProgressRing => WeatherSettingsPanel.FindControl<FluentAvalonia.UI.Controls.ProgressRing>("WeatherPreviewProgressRing")!;
+    internal ComboBoxItem WeatherIconPackFluentRegularItem => WeatherSettingsPanel.FindControl<ComboBoxItem>("WeatherIconPackFluentRegularItem")!;
+    internal ComboBoxItem WeatherIconPackFluentFilledItem => WeatherSettingsPanel.FindControl<ComboBoxItem>("WeatherIconPackFluentFilledItem")!;
+    internal TextBlock WeatherLocationSelectionTitleTextBlock => WeatherSettingsPanel.FindControl<TextBlock>("WeatherLocationSelectionTitleTextBlock")!;
+    internal TextBlock WeatherLocationSelectionDescriptionTextBlock => WeatherSettingsPanel.FindControl<TextBlock>("WeatherLocationSelectionDescriptionTextBlock")!;
+    internal TextBlock WeatherLocationValueTextBlock => WeatherSettingsPanel.FindControl<TextBlock>("WeatherLocationValueTextBlock")!;
+    internal TextBlock WeatherLocationStatusTextBlock => WeatherSettingsPanel.FindControl<TextBlock>("WeatherLocationStatusTextBlock")!;
+    internal TextBlock WeatherAlertListTitleTextBlock => WeatherSettingsPanel.FindControl<TextBlock>("WeatherAlertListTitleTextBlock")!;
+    internal TextBlock WeatherAlertListDescriptionTextBlock => WeatherSettingsPanel.FindControl<TextBlock>("WeatherAlertListDescriptionTextBlock")!;
+    internal TextBlock WeatherFooterHintTextBlock => WeatherSettingsPanel.FindControl<TextBlock>("WeatherFooterHintTextBlock")!;
+
+    // --- UpdateSettingsPage ---
+    internal TextBlock UpdatePanelTitleTextBlock => UpdateSettingsPanel.FindControl<TextBlock>("UpdatePanelTitleTextBlock")!;
+    internal FluentAvalonia.UI.Controls.SettingsExpander UpdateOptionsSettingsExpander => UpdateSettingsPanel.FindControl<FluentAvalonia.UI.Controls.SettingsExpander>("UpdateOptionsSettingsExpander")!;
+    internal FluentAvalonia.UI.Controls.SettingsExpander UpdateActionsSettingsExpander => UpdateSettingsPanel.FindControl<FluentAvalonia.UI.Controls.SettingsExpander>("UpdateActionsSettingsExpander")!;
+    internal TextBlock UpdateCurrentVersionLabelTextBlock => UpdateSettingsPanel.FindControl<TextBlock>("UpdateCurrentVersionLabelTextBlock")!;
+    internal TextBlock UpdateCurrentVersionValueTextBlock => UpdateSettingsPanel.FindControl<TextBlock>("UpdateCurrentVersionValueTextBlock")!;
+    internal TextBlock UpdateLatestVersionLabelTextBlock => UpdateSettingsPanel.FindControl<TextBlock>("UpdateLatestVersionLabelTextBlock")!;
+    internal TextBlock UpdateLatestVersionValueTextBlock => UpdateSettingsPanel.FindControl<TextBlock>("UpdateLatestVersionValueTextBlock")!;
+    internal TextBlock UpdatePublishedAtLabelTextBlock => UpdateSettingsPanel.FindControl<TextBlock>("UpdatePublishedAtLabelTextBlock")!;
+    internal TextBlock UpdatePublishedAtValueTextBlock => UpdateSettingsPanel.FindControl<TextBlock>("UpdatePublishedAtValueTextBlock")!;
+    internal TextBlock UpdateChannelLabelTextBlock => UpdateSettingsPanel.FindControl<TextBlock>("UpdateChannelLabelTextBlock")!;
+    internal ListBoxItem UpdateChannelStableChipItem => UpdateSettingsPanel.FindControl<ListBoxItem>("UpdateChannelStableChipItem")!;
+    internal ListBoxItem UpdateChannelPreviewChipItem => UpdateSettingsPanel.FindControl<ListBoxItem>("UpdateChannelPreviewChipItem")!;
+    internal ToggleSwitch AutoCheckUpdatesToggleSwitch => UpdateSettingsPanel.FindControl<ToggleSwitch>("AutoCheckUpdatesToggleSwitch")! ;
+    internal ListBox UpdateChannelChipListBox => UpdateSettingsPanel.FindControl<ListBox>("UpdateChannelChipListBox")!;
+    internal Button CheckForUpdatesButton => UpdateSettingsPanel.FindControl<Button>("CheckForUpdatesButton")!;
+    internal Button DownloadAndInstallUpdateButton => UpdateSettingsPanel.FindControl<Button>("DownloadAndInstallUpdateButton")!;
+    internal ProgressBar UpdateDownloadProgressBar => UpdateSettingsPanel.FindControl<ProgressBar>("UpdateDownloadProgressBar")!;
+    internal TextBlock UpdateDownloadProgressTextBlock => UpdateSettingsPanel.FindControl<TextBlock>("UpdateDownloadProgressTextBlock")!;
+    internal TextBlock UpdateStatusTextBlock => UpdateSettingsPanel.FindControl<TextBlock>("UpdateStatusTextBlock")!;
+
+    // --- AboutSettingsPage ---
+    internal TextBlock AboutPanelTitleTextBlock => AboutSettingsPanel.FindControl<TextBlock>("AboutPanelTitleTextBlock")!;
+    internal FluentAvalonia.UI.Controls.SettingsExpander AboutStartupSettingsExpander => AboutSettingsPanel.FindControl<FluentAvalonia.UI.Controls.SettingsExpander>("AboutStartupSettingsExpander")!;
+    internal FluentAvalonia.UI.Controls.SettingsExpander AboutRenderModeSettingsExpander => AboutSettingsPanel.FindControl<FluentAvalonia.UI.Controls.SettingsExpander>("AboutRenderModeSettingsExpander")!;
+    internal ToggleSwitch AutoStartWithWindowsToggleSwitch => AboutSettingsPanel.FindControl<ToggleSwitch>("AutoStartWithWindowsToggleSwitch")!;
+    internal ComboBox AppRenderModeComboBox => AboutSettingsPanel.FindControl<ComboBox>("AppRenderModeComboBox")!;
+    internal TextBlock CurrentRenderBackendLabelTextBlock => AboutSettingsPanel.FindControl<TextBlock>("CurrentRenderBackendLabelTextBlock")!;
+    internal TextBlock CurrentRenderBackendValueTextBlock => AboutSettingsPanel.FindControl<TextBlock>("CurrentRenderBackendValueTextBlock")!;
+    internal TextBlock CurrentRenderBackendImplementationTextBlock => AboutSettingsPanel.FindControl<TextBlock>("CurrentRenderBackendImplementationTextBlock")!;
+    internal TextBlock VersionTextBlock => AboutSettingsPanel.FindControl<TextBlock>("VersionTextBlock")!;
+    internal TextBlock CodeNameTextBlock => AboutSettingsPanel.FindControl<TextBlock>("CodeNameTextBlock")!;
+    internal TextBlock FontInfoTextBlock => AboutSettingsPanel.FindControl<TextBlock>("FontInfoTextBlock")!;
+
+    // --- LauncherSettingsPage ---
+    internal TextBlock LauncherSettingsPanelTitleTextBlock => LauncherSettingsPanel.FindControl<TextBlock>("LauncherSettingsPanelTitleTextBlock")!;
+    internal FluentAvalonia.UI.Controls.SettingsExpander LauncherHiddenItemsSettingsExpander => LauncherSettingsPanel.FindControl<FluentAvalonia.UI.Controls.SettingsExpander>("LauncherHiddenItemsSettingsExpander")!;
+    internal TextBlock LauncherHiddenItemsEmptyTextBlock => LauncherSettingsPanel.FindControl<TextBlock>("LauncherHiddenItemsEmptyTextBlock")!;
+    internal TextBlock LauncherHiddenItemsDescriptionTextBlock => LauncherSettingsPanel.FindControl<TextBlock>("LauncherHiddenItemsDescriptionTextBlock")!;
+
 }
 
+
+

LanMountainDesktop/Views/MainWindow.Update.cs

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