0.5.10

多线程

LanAirApp/plugins/LanMountainDesktop.PluginMarketplace/AirAppMarketCacheService.cs

@@ -1,41 +0,0 @@
-namespace LanMountainDesktop.PluginMarketplace;
-
-internal sealed class AirAppMarketCacheService
-{
-    private readonly string _cacheDirectory;
-
-    public AirAppMarketCacheService(string dataDirectory)
-    {
-        ArgumentException.ThrowIfNullOrWhiteSpace(dataDirectory);
-        _cacheDirectory = Path.Combine(dataDirectory, "cache");
-    }
-
-    public string CacheFilePath => Path.Combine(_cacheDirectory, "index.json");
-
-    public void SaveIndexJson(string json)
-    {
-        ArgumentException.ThrowIfNullOrWhiteSpace(json);
-        Directory.CreateDirectory(_cacheDirectory);
-        File.WriteAllText(CacheFilePath, json);
-    }
-
-    public bool TryReadIndexJson(out string json)
-    {
-        try
-        {
-            if (!File.Exists(CacheFilePath))
-            {
-                json = string.Empty;
-                return false;
-            }
-
-            json = File.ReadAllText(CacheFilePath);
-            return !string.IsNullOrWhiteSpace(json);
-        }
-        catch
-        {
-            json = string.Empty;
-            return false;
-        }
-    }
-}

LanAirApp/plugins/LanMountainDesktop.PluginMarketplace/AirAppMarketIndexService.cs

@@ -1,77 +0,0 @@
-using System.Net.Http.Headers;
-
-namespace LanMountainDesktop.PluginMarketplace;
-
-internal sealed class AirAppMarketIndexService : IDisposable
-{
-    private readonly AirAppMarketCacheService _cacheService;
-    private readonly HttpClient _httpClient;
-
-    public AirAppMarketIndexService(AirAppMarketCacheService cacheService)
-    {
-        _cacheService = cacheService;
-        _httpClient = new HttpClient
-        {
-            Timeout = TimeSpan.FromSeconds(20)
-        };
-        _httpClient.DefaultRequestHeaders.UserAgent.ParseAdd("LanMountainDesktop-PluginMarketplace/1.0");
-        _httpClient.DefaultRequestHeaders.Accept.Add(
-            new MediaTypeWithQualityHeaderValue("application/json"));
-    }
-
-    public async Task<AirAppMarketLoadResult> LoadAsync(CancellationToken cancellationToken = default)
-    {
-        Exception? networkError = null;
-
-        try
-        {
-            using var response = await _httpClient.GetAsync(
-                AirAppMarketDefaults.DefaultIndexUrl,
-                cancellationToken);
-            var json = await response.Content.ReadAsStringAsync(cancellationToken);
-            response.EnsureSuccessStatusCode();
-
-            var document = AirAppMarketIndexDocument.Load(json, AirAppMarketDefaults.DefaultIndexUrl);
-            _cacheService.SaveIndexJson(json);
-            return new AirAppMarketLoadResult(true, document, AirAppMarketLoadSource.Network, null, null);
-        }
-        catch (OperationCanceledException)
-        {
-            throw;
-        }
-        catch (Exception ex)
-        {
-            networkError = ex;
-        }
-
-        if (_cacheService.TryReadIndexJson(out var cachedJson))
-        {
-            try
-            {
-                var cachedDocument = AirAppMarketIndexDocument.Load(cachedJson, _cacheService.CacheFilePath);
-                return new AirAppMarketLoadResult(
-                    true,
-                    cachedDocument,
-                    AirAppMarketLoadSource.Cache,
-                    networkError?.Message,
-                    null);
-            }
-            catch (Exception cacheEx)
-            {
-                return new AirAppMarketLoadResult(
-                    false,
-                    null,
-                    null,
-                    null,
-                    $"{networkError?.Message ?? "Unknown network error"} | Cached index invalid: {cacheEx.Message}");
-            }
-        }
-
-        return new AirAppMarketLoadResult(false, null, null, null, networkError?.Message ?? "Unknown network error");
-    }
-
-    public void Dispose()
-    {
-        _httpClient.Dispose();
-    }
-}

LanAirApp/plugins/LanMountainDesktop.PluginMarketplace/AirAppMarketInstallService.cs

@@ -1,83 +0,0 @@
-using System.Security.Cryptography;
-using LanMountainDesktop.PluginSdk;
-
-namespace LanMountainDesktop.PluginMarketplace;
-
-internal sealed class AirAppMarketInstallService : IDisposable
-{
-    private readonly IPluginPackageManager _packageManager;
-    private readonly HttpClient _httpClient;
-    private readonly string _downloadsDirectory;
-
-    public AirAppMarketInstallService(IPluginPackageManager packageManager, string dataDirectory)
-    {
-        _packageManager = packageManager;
-        _downloadsDirectory = Path.Combine(dataDirectory, "downloads");
-        _httpClient = new HttpClient
-        {
-            Timeout = TimeSpan.FromMinutes(2)
-        };
-        _httpClient.DefaultRequestHeaders.UserAgent.ParseAdd("LanMountainDesktop-PluginMarketplace/1.0");
-    }
-
-    public async Task<AirAppMarketInstallResult> InstallAsync(
-        AirAppMarketPluginEntry plugin,
-        CancellationToken cancellationToken = default)
-    {
-        ArgumentNullException.ThrowIfNull(plugin);
-
-        Directory.CreateDirectory(_downloadsDirectory);
-        var downloadPath = Path.Combine(
-            _downloadsDirectory,
-            $"{SanitizeFileName(plugin.Id)}-{SanitizeFileName(plugin.Version)}.laapp");
-
-        try
-        {
-            using var response = await _httpClient.GetAsync(
-                plugin.DownloadUrl,
-                HttpCompletionOption.ResponseHeadersRead,
-                cancellationToken);
-            response.EnsureSuccessStatusCode();
-
-            await using (var responseStream = await response.Content.ReadAsStreamAsync(cancellationToken))
-            await using (var destinationStream = File.Create(downloadPath))
-            {
-                await responseStream.CopyToAsync(destinationStream, cancellationToken);
-            }
-
-            await using var hashStream = File.OpenRead(downloadPath);
-            var hashBytes = await SHA256.HashDataAsync(hashStream, cancellationToken);
-            var actualHash = Convert.ToHexString(hashBytes).ToLowerInvariant();
-            if (!string.Equals(actualHash, plugin.Sha256, StringComparison.OrdinalIgnoreCase))
-            {
-                File.Delete(downloadPath);
-                return new AirAppMarketInstallResult(
-                    false,
-                    null,
-                    $"SHA-256 mismatch. Expected {plugin.Sha256}, actual {actualHash}.");
-            }
-
-            var installResult = _packageManager.InstallPackage(downloadPath);
-            return new AirAppMarketInstallResult(true, installResult, null);
-        }
-        catch (OperationCanceledException)
-        {
-            throw;
-        }
-        catch (Exception ex)
-        {
-            return new AirAppMarketInstallResult(false, null, ex.Message);
-        }
-    }
-
-    public void Dispose()
-    {
-        _httpClient.Dispose();
-    }
-
-    private static string SanitizeFileName(string value)
-    {
-        var invalidChars = Path.GetInvalidFileNameChars();
-        return new string(value.Select(ch => invalidChars.Contains(ch) ? '_' : ch).ToArray());
-    }
-}

LanAirApp/plugins/LanMountainDesktop.PluginMarketplace/AirAppMarketModels.cs

@@ -1,299 +0,0 @@
-using System.Globalization;
-using System.Text.Json;
-using LanMountainDesktop.PluginSdk;
-
-namespace LanMountainDesktop.PluginMarketplace;
-
-internal static class AirAppMarketDefaults
-{
-    public const string DefaultIndexUrl =
-        "https://raw.githubusercontent.com/wwiinnddyy/LanMountainDesktop/main/airappmarket/index.json";
-}
-
-internal enum AirAppMarketLoadSource
-{
-    Network = 0,
-    Cache = 1
-}
-
-internal enum AirAppMarketInstallState
-{
-    NotInstalled = 0,
-    UpdateAvailable = 1,
-    Installed = 2
-}
-
-internal sealed record AirAppMarketLoadResult(
-    bool Success,
-    AirAppMarketIndexDocument? Document,
-    AirAppMarketLoadSource? Source,
-    string? WarningMessage,
-    string? ErrorMessage);
-
-internal sealed record AirAppMarketInstallResult(
-    bool Success,
-    PluginPackageInstallResult? InstallResult,
-    string? ErrorMessage);
-
-internal sealed class AirAppMarketIndexDocument
-{
-    private static readonly JsonSerializerOptions SerializerOptions = new()
-    {
-        PropertyNameCaseInsensitive = true,
-        ReadCommentHandling = JsonCommentHandling.Skip,
-        AllowTrailingCommas = true
-    };
-
-    public string SchemaVersion { get; init; } = string.Empty;
-
-    public string SourceId { get; init; } = string.Empty;
-
-    public string SourceName { get; init; } = string.Empty;
-
-    public DateTimeOffset GeneratedAt { get; init; }
-
-    public List<AirAppMarketPluginEntry> Plugins { get; init; } = [];
-
-    public static AirAppMarketIndexDocument Load(string json, string sourceName)
-    {
-        ArgumentException.ThrowIfNullOrWhiteSpace(json);
-        ArgumentException.ThrowIfNullOrWhiteSpace(sourceName);
-
-        var document = JsonSerializer.Deserialize<AirAppMarketIndexDocument>(
-            json.TrimStart('\uFEFF'),
-            SerializerOptions);
-
-        if (document is null)
-        {
-            throw new InvalidOperationException($"Failed to parse market index '{sourceName}'.");
-        }
-
-        return document.ValidateAndNormalize(sourceName);
-    }
-
-    private AirAppMarketIndexDocument ValidateAndNormalize(string sourceName)
-    {
-        var plugins = Plugins ?? [];
-        var normalizedPlugins = new List<AirAppMarketPluginEntry>(plugins.Count);
-        var seenIds = new HashSet<string>(StringComparer.OrdinalIgnoreCase);
-
-        foreach (var plugin in plugins)
-        {
-            var normalizedPlugin = plugin.ValidateAndNormalize(sourceName);
-            if (!seenIds.Add(normalizedPlugin.Id))
-            {
-                throw new InvalidOperationException(
-                    $"Market index '{sourceName}' contains duplicate plugin id '{normalizedPlugin.Id}'.");
-            }
-
-            normalizedPlugins.Add(normalizedPlugin);
-        }
-
-        return new AirAppMarketIndexDocument
-        {
-            SchemaVersion = RequireValue(SchemaVersion, nameof(SchemaVersion), sourceName),
-            SourceId = RequireValue(SourceId, nameof(SourceId), sourceName),
-            SourceName = RequireValue(SourceName, nameof(SourceName), sourceName),
-            GeneratedAt = GeneratedAt == default
-                ? throw new InvalidOperationException($"Market index '{sourceName}' is missing a valid generatedAt timestamp.")
-                : GeneratedAt,
-            Plugins = normalizedPlugins
-                .OrderBy(plugin => plugin.Name, StringComparer.OrdinalIgnoreCase)
-                .ToList()
-        };
-    }
-
-    private static string RequireValue(string? value, string propertyName, string sourceName)
-    {
-        var normalized = NormalizeValue(value);
-        if (string.IsNullOrWhiteSpace(normalized))
-        {
-            throw new InvalidOperationException($"Market index '{sourceName}' is missing required property '{propertyName}'.");
-        }
-
-        return normalized;
-    }
-
-    internal static string? NormalizeValue(string? value)
-    {
-        return string.IsNullOrWhiteSpace(value) ? null : value.Trim();
-    }
-
-    internal static string NormalizeVersion(string? value, string propertyName, string sourceName)
-    {
-        var normalized = RequireValue(value, propertyName, sourceName);
-        if (!TryParseVersion(normalized, out _))
-        {
-            throw new InvalidOperationException(
-                $"Market index '{sourceName}' declares invalid version '{normalized}' for '{propertyName}'.");
-        }
-
-        return normalized;
-    }
-
-    internal static void EnsureUrl(string url, string propertyName, string sourceName)
-    {
-        if (!Uri.TryCreate(url, UriKind.Absolute, out var uri) ||
-            (uri.Scheme != Uri.UriSchemeHttp && uri.Scheme != Uri.UriSchemeHttps))
-        {
-            throw new InvalidOperationException(
-                $"Market index '{sourceName}' declares invalid URL '{url}' for '{propertyName}'.");
-        }
-    }
-
-    internal static bool TryParseVersion(string? value, out Version? version)
-    {
-        version = null;
-        var normalized = NormalizeValue(value);
-        if (string.IsNullOrWhiteSpace(normalized))
-        {
-            return false;
-        }
-
-        if (normalized.StartsWith("v", StringComparison.OrdinalIgnoreCase))
-        {
-            normalized = normalized[1..];
-        }
-
-        var separatorIndex = normalized.IndexOfAny(['-', '+', ' ']);
-        if (separatorIndex > 0)
-        {
-            normalized = normalized[..separatorIndex];
-        }
-
-        if (!Version.TryParse(normalized, out var parsed))
-        {
-            return false;
-        }
-
-        version = new Version(
-            Math.Max(0, parsed.Major),
-            Math.Max(0, parsed.Minor),
-            Math.Max(0, parsed.Build));
-        return true;
-    }
-}
-
-internal sealed class AirAppMarketPluginEntry
-{
-    public string Id { get; init; } = string.Empty;
-
-    public string Name { get; init; } = string.Empty;
-
-    public string Description { get; init; } = string.Empty;
-
-    public string Author { get; init; } = string.Empty;
-
-    public string Version { get; init; } = string.Empty;
-
-    public string ApiVersion { get; init; } = string.Empty;
-
-    public string MinHostVersion { get; init; } = string.Empty;
-
-    public string DownloadUrl { get; init; } = string.Empty;
-
-    public string Sha256 { get; init; } = string.Empty;
-
-    public long PackageSizeBytes { get; init; }
-
-    public string IconUrl { get; init; } = string.Empty;
-
-    public string HomepageUrl { get; init; } = string.Empty;
-
-    public string RepositoryUrl { get; init; } = string.Empty;
-
-    public List<string> Tags { get; init; } = [];
-
-    public DateTimeOffset PublishedAt { get; init; }
-
-    public DateTimeOffset UpdatedAt { get; init; }
-
-    public string ReleaseNotes { get; init; } = string.Empty;
-
-    public AirAppMarketPluginEntry ValidateAndNormalize(string sourceName)
-    {
-        var normalizedTags = (Tags ?? [])
-            .Select(tag => AirAppMarketIndexDocument.NormalizeValue(tag))
-            .Where(tag => !string.IsNullOrWhiteSpace(tag))
-            .Select(tag => tag!)
-            .Distinct(StringComparer.OrdinalIgnoreCase)
-            .OrderBy(tag => tag, StringComparer.OrdinalIgnoreCase)
-            .ToList();
-
-        var normalizedSha = AirAppMarketIndexDocument.NormalizeValue(Sha256)?.ToLowerInvariant()
-            ?? throw new InvalidOperationException(
-                $"Market index '{sourceName}' is missing required property '{nameof(Sha256)}'.");
-
-        if (normalizedSha.Length != 64 || normalizedSha.Any(ch => !Uri.IsHexDigit(ch)))
-        {
-            throw new InvalidOperationException(
-                $"Market index '{sourceName}' declares invalid SHA-256 '{normalizedSha}' for plugin '{Id}'.");
-        }
-
-        var normalizedDownloadUrl = AirAppMarketIndexDocument.NormalizeValue(DownloadUrl)
-            ?? throw new InvalidOperationException(
-                $"Market index '{sourceName}' is missing required property '{nameof(DownloadUrl)}'.");
-        var normalizedIconUrl = AirAppMarketIndexDocument.NormalizeValue(IconUrl)
-            ?? throw new InvalidOperationException(
-                $"Market index '{sourceName}' is missing required property '{nameof(IconUrl)}'.");
-        var normalizedHomepageUrl = AirAppMarketIndexDocument.NormalizeValue(HomepageUrl)
-            ?? throw new InvalidOperationException(
-                $"Market index '{sourceName}' is missing required property '{nameof(HomepageUrl)}'.");
-        var normalizedRepositoryUrl = AirAppMarketIndexDocument.NormalizeValue(RepositoryUrl)
-            ?? throw new InvalidOperationException(
-                $"Market index '{sourceName}' is missing required property '{nameof(RepositoryUrl)}'.");
-
-        AirAppMarketIndexDocument.EnsureUrl(normalizedDownloadUrl, nameof(DownloadUrl), sourceName);
-        AirAppMarketIndexDocument.EnsureUrl(normalizedIconUrl, nameof(IconUrl), sourceName);
-        AirAppMarketIndexDocument.EnsureUrl(normalizedHomepageUrl, nameof(HomepageUrl), sourceName);
-        AirAppMarketIndexDocument.EnsureUrl(normalizedRepositoryUrl, nameof(RepositoryUrl), sourceName);
-
-        if (PackageSizeBytes <= 0)
-        {
-            throw new InvalidOperationException(
-                $"Market index '{sourceName}' declares invalid packageSizeBytes '{PackageSizeBytes}' for plugin '{Id}'.");
-        }
-
-        if (PublishedAt == default || UpdatedAt == default)
-        {
-            throw new InvalidOperationException(
-                $"Market index '{sourceName}' is missing valid publish timestamps for plugin '{Id}'.");
-        }
-
-        return new AirAppMarketPluginEntry
-        {
-            Id = AirAppMarketIndexDocument.NormalizeValue(Id)
-                ?? throw new InvalidOperationException($"Market index '{sourceName}' is missing plugin id."),
-            Name = AirAppMarketIndexDocument.NormalizeValue(Name)
-                ?? throw new InvalidOperationException($"Market index '{sourceName}' is missing plugin name."),
-            Description = AirAppMarketIndexDocument.NormalizeValue(Description)
-                ?? throw new InvalidOperationException($"Market index '{sourceName}' is missing plugin description."),
-            Author = AirAppMarketIndexDocument.NormalizeValue(Author)
-                ?? throw new InvalidOperationException($"Market index '{sourceName}' is missing plugin author."),
-            Version = AirAppMarketIndexDocument.NormalizeVersion(Version, nameof(Version), sourceName),
-            ApiVersion = AirAppMarketIndexDocument.NormalizeVersion(ApiVersion, nameof(ApiVersion), sourceName),
-            MinHostVersion = AirAppMarketIndexDocument.NormalizeVersion(MinHostVersion, nameof(MinHostVersion), sourceName),
-            DownloadUrl = normalizedDownloadUrl,
-            Sha256 = normalizedSha,
-            PackageSizeBytes = PackageSizeBytes,
-            IconUrl = normalizedIconUrl,
-            HomepageUrl = normalizedHomepageUrl,
-            RepositoryUrl = normalizedRepositoryUrl,
-            Tags = normalizedTags,
-            PublishedAt = PublishedAt,
-            UpdatedAt = UpdatedAt,
-            ReleaseNotes = AirAppMarketIndexDocument.NormalizeValue(ReleaseNotes)
-                ?? throw new InvalidOperationException($"Market index '{sourceName}' is missing release notes for plugin '{Id}'.")
-        };
-    }
-
-    public string GetVersionSummary()
-    {
-        return string.Format(
-            CultureInfo.InvariantCulture,
-            "v{0} | API {1} | Host >= {2}",
-            Version,
-            ApiVersion,
-            MinHostVersion);
-    }
-}

LanAirApp/plugins/LanMountainDesktop.PluginMarketplace/LanMountainDesktop.PluginMarketplace.csproj

@@ -1,35 +0,0 @@
-<Project Sdk="Microsoft.NET.Sdk">
-
-  <PropertyGroup>
-    <TargetFramework>net10.0</TargetFramework>
-    <ImplicitUsings>enable</ImplicitUsings>
-    <Nullable>enable</Nullable>
-    <Version>1.0.0</Version>
-    <EnableDynamicLoading>true</EnableDynamicLoading>
-    <OutputPath>bin\$(Configuration)\$(TargetFramework)\content\</OutputPath>
-    <AppendTargetFrameworkToOutputPath>false</AppendTargetFrameworkToOutputPath>
-    <AppendRuntimeIdentifierToOutputPath>false</AppendRuntimeIdentifierToOutputPath>
-    <PluginPackageOutputDirectory>..\..\..\LanMountainDesktop\bin\$(Configuration)\$(TargetFramework)\Extensions\Plugins\</PluginPackageOutputDirectory>
-    <PluginPackagePath>$(PluginPackageOutputDirectory)$(AssemblyName).laapp</PluginPackagePath>
-    <PluginReleaseOutputDirectory>..\..\releases\</PluginReleaseOutputDirectory>
-    <PluginReleasePackagePath>$(PluginReleaseOutputDirectory)$(AssemblyName).$(Version).laapp</PluginReleasePackagePath>
-    <LegacyLoosePluginOutputDirectory>..\..\..\LanMountainDesktop\bin\$(Configuration)\$(TargetFramework)\Extensions\Plugins\PluginMarketplace\</LegacyLoosePluginOutputDirectory>
-  </PropertyGroup>
-
-  <ItemGroup>
-    <ProjectReference Include="..\..\..\LanMountainDesktop.PluginSdk\LanMountainDesktop.PluginSdk.csproj" Private="false" />
-    <None Include="plugin.json" CopyToOutputDirectory="PreserveNewest" />
-    <None Include="Localization\*.json" CopyToOutputDirectory="PreserveNewest" />
-  </ItemGroup>
-
-  <Target Name="CreateLaappPackage" AfterTargets="Build">
-    <MakeDir Directories="$(PluginPackageOutputDirectory)" />
-    <MakeDir Directories="$(PluginReleaseOutputDirectory)" />
-    <RemoveDir Directories="$(LegacyLoosePluginOutputDirectory)" />
-    <Delete Files="$(PluginPackagePath)" TreatErrorsAsWarnings="true" />
-    <Delete Files="$(PluginReleasePackagePath)" TreatErrorsAsWarnings="true" />
-    <ZipDirectory SourceDirectory="$(OutputPath)" DestinationFile="$(PluginPackagePath)" />
-    <Copy SourceFiles="$(PluginPackagePath)" DestinationFiles="$(PluginReleasePackagePath)" />
-  </Target>
-
-</Project>

LanAirApp/plugins/LanMountainDesktop.PluginMarketplace/Localization/en-US.json

@@ -1,37 +0,0 @@
-{
-  "market.page_title": "Plugin Marketplace",
-  "market.toolbar.search_placeholder": "Search plugins",
-  "market.toolbar.refresh": "Refresh",
-  "market.status.loading": "Loading the official plugin marketplace...",
-  "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 plugin marketplace: {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 marketplace 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 from 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.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..."
-}

LanAirApp/plugins/LanMountainDesktop.PluginMarketplace/Localization/zh-CN.json

@@ -1,37 +0,0 @@
-{
-  "market.page_title": "插件市场",
-  "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": "没有匹配的插件。",
-  "market.card.subtitle_format": "{0} · v{1}",
-  "market.card.loaded": "已加载",
-  "market.card.pending_restart": "需重启",
-  "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": "当前已安装版本",
-  "market.detail.not_installed": "未安装",
-  "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…"
-}

LanAirApp/plugins/LanMountainDesktop.PluginMarketplace/PluginMarketplacePlugin.cs

@@ -1,47 +0,0 @@
-using LanMountainDesktop.PluginSdk;
-
-namespace LanMountainDesktop.PluginMarketplace;
-
-[PluginEntrance]
-public sealed class PluginMarketplacePlugin : PluginBase, IDisposable
-{
-    private AirAppMarketIndexService? _indexService;
-    private AirAppMarketInstallService? _installService;
-
-    public override void Initialize(IPluginContext context)
-    {
-        Directory.CreateDirectory(context.DataDirectory);
-
-        var localizer = PluginLocalizer.Create(context);
-        var packageManager = context.GetService<IPluginPackageManager>()
-            ?? throw new InvalidOperationException(
-                "The host does not expose IPluginPackageManager. LanMountainDesktop.PluginMarketplace requires a newer host build.");
-
-        var cacheService = new AirAppMarketCacheService(context.DataDirectory);
-        _indexService = new AirAppMarketIndexService(cacheService);
-        _installService = new AirAppMarketInstallService(packageManager, context.DataDirectory);
-
-        context.RegisterService(cacheService);
-        context.RegisterService(_indexService);
-        context.RegisterService(_installService);
-
-        context.RegisterSettingsPage(new PluginSettingsPageRegistration(
-            "marketplace",
-            localizer.GetString("market.page_title", "插件市场"),
-            () => new PluginMarketplaceSettingsView(
-                context,
-                localizer,
-                packageManager,
-                _indexService,
-                _installService),
-            sortOrder: -100));
-    }
-
-    public void Dispose()
-    {
-        _installService?.Dispose();
-        _indexService?.Dispose();
-        _installService = null;
-        _indexService = null;
-    }
-}

LanAirApp/plugins/LanMountainDesktop.PluginMarketplace/PluginMarketplaceSettingsView.cs

@@ -1,727 +0,0 @@
-using System.Globalization;
-using Avalonia;
-using Avalonia.Controls;
-using Avalonia.Interactivity;
-using Avalonia.Layout;
-using Avalonia.Media;
-using LanMountainDesktop.PluginSdk;
-
-namespace LanMountainDesktop.PluginMarketplace;
-
-internal sealed class PluginMarketplaceSettingsView : UserControl
-{
-    private static readonly IBrush SurfaceBrush = new SolidColorBrush(Color.Parse("#14000000"));
-    private static readonly IBrush SelectedSurfaceBrush = new SolidColorBrush(Color.Parse("#1F0EA5E9"));
-    private static readonly IBrush SuccessBrush = new SolidColorBrush(Color.Parse("#FF0F766E"));
-    private static readonly IBrush WarningBrush = new SolidColorBrush(Color.Parse("#FF9A6700"));
-    private static readonly IBrush ErrorBrush = new SolidColorBrush(Color.Parse("#FFC42B1C"));
-
-    private readonly PluginLocalizer _localizer;
-    private readonly IPluginPackageManager _packageManager;
-    private readonly AirAppMarketIndexService _indexService;
-    private readonly AirAppMarketInstallService _installService;
-    private readonly Version? _hostVersion;
-
-    private readonly TextBox _searchTextBox;
-    private readonly Button _refreshButton;
-    private readonly TextBlock _statusTextBlock;
-    private readonly StackPanel _pluginListHost;
-    private readonly Border _detailBorder;
-
-    private AirAppMarketIndexDocument? _document;
-    private AirAppMarketPluginEntry? _selectedPlugin;
-    private Dictionary<string, InstalledPluginInfo> _installedPlugins = new(StringComparer.OrdinalIgnoreCase);
-    private bool _isRefreshing;
-    private bool _isInstalling;
-    private bool _hasLoadedOnce;
-
-    public PluginMarketplaceSettingsView(
-        IPluginContext context,
-        PluginLocalizer localizer,
-        IPluginPackageManager packageManager,
-        AirAppMarketIndexService indexService,
-        AirAppMarketInstallService installService)
-    {
-        _localizer = localizer;
-        _packageManager = packageManager;
-        _indexService = indexService;
-        _installService = installService;
-        _hostVersion = context.TryGetProperty<string>(PluginHostPropertyKeys.HostVersion, out var hostVersionText) &&
-                       AirAppMarketIndexDocument.TryParseVersion(hostVersionText, out var parsedHostVersion)
-            ? parsedHostVersion
-            : null;
-
-        _searchTextBox = new TextBox
-        {
-            MinWidth = 240,
-            Watermark = T("market.toolbar.search_placeholder", "搜索插件")
-        };
-        _searchTextBox.PropertyChanged += (_, e) =>
-        {
-            if (e.Property == TextBox.TextProperty)
-            {
-                RebuildSurface();
-            }
-        };
-
-        _refreshButton = new Button
-        {
-            Content = T("market.toolbar.refresh", "刷新"),
-            HorizontalAlignment = HorizontalAlignment.Left
-        };
-        _refreshButton.Click += OnRefreshClick;
-
-        _statusTextBlock = new TextBlock
-        {
-            Text = T("market.status.loading", "正在加载官方插件市场…"),
-            TextWrapping = TextWrapping.Wrap,
-            Foreground = WarningBrush
-        };
-
-        _pluginListHost = new StackPanel
-        {
-            Spacing = 10
-        };
-
-        _detailBorder = CreatePanelShell();
-
-        Content = BuildLayout();
-        AttachedToVisualTree += async (_, _) =>
-        {
-            if (_hasLoadedOnce)
-            {
-                return;
-            }
-
-            _hasLoadedOnce = true;
-            await RefreshAsync();
-        };
-    }
-
-    private Control BuildLayout()
-    {
-        var root = new Grid
-        {
-            RowDefinitions = new RowDefinitions("Auto,*"),
-            RowSpacing = 16
-        };
-
-        var toolbar = new Grid
-        {
-            ColumnDefinitions = new ColumnDefinitions("*,Auto"),
-            ColumnSpacing = 12
-        };
-
-        toolbar.Children.Add(new StackPanel
-        {
-            Spacing = 8,
-            Children =
-            {
-                new StackPanel
-                {
-                    Orientation = Orientation.Horizontal,
-                    Spacing = 10,
-                    Children =
-                    {
-                        _searchTextBox,
-                        _refreshButton
-                    }
-                },
-                _statusTextBlock
-            }
-        });
-
-        var contentGrid = new Grid
-        {
-            ColumnDefinitions = new ColumnDefinitions("360,*"),
-            ColumnSpacing = 16
-        };
-
-        var listShell = CreatePanelShell();
-        listShell.Child = new ScrollViewer
-        {
-            Content = _pluginListHost
-        };
-
-        contentGrid.Children.Add(listShell);
-        contentGrid.Children.Add(_detailBorder);
-        Grid.SetColumn(_detailBorder, 1);
-
-        root.Children.Add(toolbar);
-        root.Children.Add(contentGrid);
-        Grid.SetRow(contentGrid, 1);
-
-        return root;
-    }
-
-    private async void OnRefreshClick(object? sender, RoutedEventArgs e)
-    {
-        await RefreshAsync();
-    }
-
-    private async Task RefreshAsync()
-    {
-        if (_isRefreshing)
-        {
-            return;
-        }
-
-        _isRefreshing = true;
-        _refreshButton.IsEnabled = false;
-        SetStatus(T("market.status.loading", "正在加载官方插件市场…"), WarningBrush);
-
-        try
-        {
-            _installedPlugins = _packageManager
-                .GetInstalledPlugins()
-                .ToDictionary(plugin => plugin.Manifest.Id, StringComparer.OrdinalIgnoreCase);
-
-            var result = await _indexService.LoadAsync();
-            if (!result.Success || result.Document is null)
-            {
-                _document = null;
-                _selectedPlugin = null;
-                SetStatus(
-                    F("market.status.load_failed_format", "加载插件市场失败：{0}", result.ErrorMessage ?? T("market.detail.unknown", "未知错误")),
-                    ErrorBrush);
-                RebuildSurface();
-                return;
-            }
-
-            _document = result.Document;
-            _selectedPlugin = ResolveSelectedPlugin(_selectedPlugin?.Id, result.Document.Plugins);
-
-            var statusMessage = result.Source == AirAppMarketLoadSource.Cache
-                ? F(
-                    "market.status.loaded_cache_format",
-                    "官方源不可用，已从缓存加载 {0} 个插件。原因：{1}",
-                    result.Document.Plugins.Count,
-                    result.WarningMessage ?? T("market.detail.unknown", "未知错误"))
-                : F(
-                    "market.status.loaded_network_format",
-                    "已从官方源加载 {0} 个插件。",
-                    result.Document.Plugins.Count);
-
-            SetStatus(statusMessage, result.Source == AirAppMarketLoadSource.Cache ? WarningBrush : SuccessBrush);
-            RebuildSurface();
-        }
-        finally
-        {
-            _isRefreshing = false;
-            _refreshButton.IsEnabled = true;
-        }
-    }
-
-    private void RebuildSurface()
-    {
-        var filteredPlugins = GetFilteredPlugins();
-        if (filteredPlugins.Count > 0)
-        {
-            _selectedPlugin = ResolveSelectedPlugin(_selectedPlugin?.Id, filteredPlugins);
-        }
-        else
-        {
-            _selectedPlugin = null;
-        }
-
-        BuildPluginList(filteredPlugins);
-        BuildDetailPanel();
-    }
-
-    private List<AirAppMarketPluginEntry> GetFilteredPlugins()
-    {
-        if (_document is null)
-        {
-            return [];
-        }
-
-        var query = (_searchTextBox.Text ?? string.Empty).Trim();
-        var source = _document.Plugins;
-        if (string.IsNullOrWhiteSpace(query))
-        {
-            return source.ToList();
-        }
-
-        return source
-            .Where(plugin =>
-                plugin.Name.Contains(query, StringComparison.OrdinalIgnoreCase) ||
-                plugin.Description.Contains(query, StringComparison.OrdinalIgnoreCase) ||
-                plugin.Author.Contains(query, StringComparison.OrdinalIgnoreCase) ||
-                plugin.Id.Contains(query, StringComparison.OrdinalIgnoreCase) ||
-                plugin.Tags.Any(tag => tag.Contains(query, StringComparison.OrdinalIgnoreCase)))
-            .ToList();
-    }
-
-    private void BuildPluginList(IReadOnlyList<AirAppMarketPluginEntry> plugins)
-    {
-        _pluginListHost.Children.Clear();
-
-        if (_document is null)
-        {
-            _pluginListHost.Children.Add(CreateEmptyState(T("market.list.empty", "插件市场尚未加载。")));
-            return;
-        }
-
-        if (plugins.Count == 0)
-        {
-            _pluginListHost.Children.Add(CreateEmptyState(T("market.list.no_results", "没有匹配的插件。")));
-            return;
-        }
-
-        foreach (var plugin in plugins)
-        {
-            _pluginListHost.Children.Add(CreatePluginCard(plugin));
-        }
-    }
-
-    private Control CreatePluginCard(AirAppMarketPluginEntry plugin)
-    {
-        var installState = ResolveInstallState(plugin, out var installedPlugin);
-        var isSelected = string.Equals(_selectedPlugin?.Id, plugin.Id, StringComparison.OrdinalIgnoreCase);
-
-        var button = new Button
-        {
-            HorizontalContentAlignment = HorizontalAlignment.Stretch,
-            Padding = new Thickness(0),
-            Background = Brushes.Transparent,
-            BorderThickness = new Thickness(0),
-            Content = new Border
-            {
-                Background = isSelected ? SelectedSurfaceBrush : SurfaceBrush,
-                CornerRadius = new CornerRadius(16),
-                Padding = new Thickness(14),
-                Child = new StackPanel
-                {
-                    Spacing = 10,
-                    Children =
-                    {
-                        new Grid
-                        {
-                            ColumnDefinitions = new ColumnDefinitions("Auto,*"),
-                            ColumnSpacing = 12,
-                            Children =
-                            {
-                                CreateMonogramIcon(plugin.Name, 42),
-                                new StackPanel
-                                {
-                                    Spacing = 4,
-                                    Children =
-                                    {
-                                        new TextBlock
-                                        {
-                                            Text = plugin.Name,
-                                            FontSize = 16,
-                                            FontWeight = FontWeight.SemiBold,
-                                            TextWrapping = TextWrapping.Wrap
-                                        },
-                                        new TextBlock
-                                        {
-                                            Text = F("market.card.subtitle_format", "{0} · v{1}", plugin.Author, plugin.Version),
-                                            Foreground = Brushes.Gray,
-                                            TextWrapping = TextWrapping.Wrap
-                                        }
-                                    }
-                                }
-                            }
-                        },
-                        new TextBlock
-                        {
-                            Text = plugin.Description,
-                            TextWrapping = TextWrapping.Wrap,
-                            MaxHeight = 56
-                        },
-                        new StackPanel
-                        {
-                            Orientation = Orientation.Horizontal,
-                            Spacing = 8,
-                            Children =
-                            {
-                                CreateStateChip(T(StateKey(installState), StateFallback(installState))),
-                                CreateStateChip(installedPlugin?.IsLoaded == true
-                                    ? T("market.card.loaded", "已加载")
-                                    : T("market.card.pending_restart", "需重启")),
-                                new TextBlock
-                                {
-                                    Text = string.Join("  ", plugin.Tags.Take(3)),
-                                    VerticalAlignment = VerticalAlignment.Center,
-                                    Foreground = Brushes.Gray
-                                }
-                            }
-                        }
-                    }
-                }
-            }
-        };
-
-        button.Click += (_, _) =>
-        {
-            _selectedPlugin = plugin;
-            RebuildSurface();
-        };
-
-        return button;
-    }
-
-    private void BuildDetailPanel()
-    {
-        if (_selectedPlugin is null)
-        {
-            _detailBorder.Child = CreateEmptyState(T("market.detail.placeholder", "从左侧选择一个插件以查看详情。"));
-            return;
-        }
-
-        var plugin = _selectedPlugin;
-        var installState = ResolveInstallState(plugin, out var installedPlugin);
-        var isCompatible = IsCompatibleWithHost(plugin);
-        var installButton = new Button
-        {
-            Content = _isInstalling
-                ? T("market.button.installing", "安装中…")
-                : T(ButtonKey(installState), ButtonFallback(installState)),
-            IsEnabled = !_isInstalling && isCompatible && installState != AirAppMarketInstallState.Installed,
-            HorizontalAlignment = HorizontalAlignment.Left,
-            MinWidth = 120
-        };
-        installButton.Click += async (_, _) => await InstallSelectedPluginAsync(plugin);
-
-        var detailPanel = new StackPanel
-        {
-            Spacing = 14,
-            Children =
-            {
-                new Grid
-                {
-                    ColumnDefinitions = new ColumnDefinitions("Auto,*"),
-                    ColumnSpacing = 14,
-                    Children =
-                    {
-                        CreateMonogramIcon(plugin.Name, 64),
-                        new StackPanel
-                        {
-                            Spacing = 4,
-                            Children =
-                            {
-                                new TextBlock
-                                {
-                                    Text = plugin.Name,
-                                    FontSize = 24,
-                                    FontWeight = FontWeight.SemiBold,
-                                    TextWrapping = TextWrapping.Wrap
-                                },
-                                new TextBlock
-                                {
-                                    Text = plugin.Description,
-                                    TextWrapping = TextWrapping.Wrap
-                                }
-                            }
-                        }
-                    }
-                },
-                new StackPanel
-                {
-                    Orientation = Orientation.Horizontal,
-                    Spacing = 8,
-                    Children =
-                    {
-                        CreateStateChip(T(StateKey(installState), StateFallback(installState))),
-                        CreateStateChip(plugin.GetVersionSummary()),
-                        CreateStateChip(string.Join(", ", plugin.Tags))
-                    }
-                },
-                installButton,
-                CreateInfoRow(T("market.detail.author", "作者"), plugin.Author),
-                CreateInfoRow(T("market.detail.version", "版本"), plugin.Version),
-                CreateInfoRow(T("market.detail.api_version", "API 版本"), plugin.ApiVersion),
-                CreateInfoRow(T("market.detail.min_host_version", "最低宿主版本"), plugin.MinHostVersion),
-                CreateInfoRow(T("market.detail.installed_version", "当前已安装版本"), installedPlugin?.Manifest.Version ?? T("market.detail.not_installed", "未安装")),
-                CreateInfoRow(T("market.detail.market_source", "市场源"), AirAppMarketDefaults.DefaultIndexUrl),
-                CreateInfoRow(T("market.detail.homepage", "主页"), plugin.HomepageUrl),
-                CreateInfoRow(T("market.detail.repository", "仓库"), plugin.RepositoryUrl),
-                new TextBlock
-                {
-                    Text = T("market.detail.release_notes", "发布说明"),
-                    FontSize = 18,
-                    FontWeight = FontWeight.SemiBold
-                },
-                new Border
-                {
-                    Background = SurfaceBrush,
-                    CornerRadius = new CornerRadius(16),
-                    Padding = new Thickness(14),
-                    Child = new TextBlock
-                    {
-                        Text = plugin.ReleaseNotes,
-                        TextWrapping = TextWrapping.Wrap
-                    }
-                }
-            }
-        };
-
-        if (!isCompatible)
-        {
-            detailPanel.Children.Insert(
-                3,
-                new TextBlock
-                {
-                    Text = F(
-                        "market.status.host_incompatible_format",
-                        "当前宿主版本过低，至少需要 {0}。",
-                        plugin.MinHostVersion),
-                    Foreground = ErrorBrush,
-                    TextWrapping = TextWrapping.Wrap
-                });
-        }
-
-        _detailBorder.Child = new ScrollViewer
-        {
-            Content = detailPanel
-        };
-    }
-
-    private async Task InstallSelectedPluginAsync(AirAppMarketPluginEntry plugin)
-    {
-        if (_isInstalling)
-        {
-            return;
-        }
-
-        _isInstalling = true;
-        BuildDetailPanel();
-        SetStatus(
-            F("market.status.installing_format", "正在下载并暂存插件“{0}”…", plugin.Name),
-            WarningBrush);
-
-        try
-        {
-            var result = await _installService.InstallAsync(plugin);
-            if (!result.Success || result.InstallResult is null)
-            {
-                SetStatus(
-                    F(
-                        "market.status.install_failed_format",
-                        "安装插件失败：{0}",
-                        result.ErrorMessage ?? T("market.detail.unknown", "未知错误")),
-                    ErrorBrush);
-                return;
-            }
-
-            _installedPlugins = _packageManager
-                .GetInstalledPlugins()
-                .ToDictionary(item => item.Manifest.Id, StringComparer.OrdinalIgnoreCase);
-            SetStatus(
-                F(
-                    "market.status.install_success_format",
-                    "插件“{0}”已暂存完成，重启应用后生效。",
-                    result.InstallResult.Manifest.Name),
-                SuccessBrush);
-            RebuildSurface();
-        }
-        finally
-        {
-            _isInstalling = false;
-            BuildDetailPanel();
-        }
-    }
-
-    private AirAppMarketPluginEntry? ResolveSelectedPlugin(
-        string? selectedPluginId,
-        IReadOnlyList<AirAppMarketPluginEntry> plugins)
-    {
-        if (plugins.Count == 0)
-        {
-            return null;
-        }
-
-        if (!string.IsNullOrWhiteSpace(selectedPluginId))
-        {
-            var existing = plugins.FirstOrDefault(plugin =>
-                string.Equals(plugin.Id, selectedPluginId, StringComparison.OrdinalIgnoreCase));
-            if (existing is not null)
-            {
-                return existing;
-            }
-        }
-
-        return plugins[0];
-    }
-
-    private AirAppMarketInstallState ResolveInstallState(
-        AirAppMarketPluginEntry plugin,
-        out InstalledPluginInfo? installedPlugin)
-    {
-        if (!_installedPlugins.TryGetValue(plugin.Id, out installedPlugin))
-        {
-            return AirAppMarketInstallState.NotInstalled;
-        }
-
-        return CompareVersions(plugin.Version, installedPlugin.Manifest.Version) > 0
-            ? AirAppMarketInstallState.UpdateAvailable
-            : AirAppMarketInstallState.Installed;
-    }
-
-    private bool IsCompatibleWithHost(AirAppMarketPluginEntry plugin)
-    {
-        if (_hostVersion is null ||
-            !AirAppMarketIndexDocument.TryParseVersion(plugin.MinHostVersion, out var minHostVersion) ||
-            minHostVersion is null)
-        {
-            return true;
-        }
-
-        return _hostVersion >= minHostVersion;
-    }
-
-    private void SetStatus(string message, IBrush foreground)
-    {
-        _statusTextBlock.Text = message;
-        _statusTextBlock.Foreground = foreground;
-    }
-
-    private static int CompareVersions(string? left, string? right)
-    {
-        if (!AirAppMarketIndexDocument.TryParseVersion(left, out var leftVersion))
-        {
-            leftVersion = new Version(0, 0, 0);
-        }
-
-        if (!AirAppMarketIndexDocument.TryParseVersion(right, out var rightVersion))
-        {
-            rightVersion = new Version(0, 0, 0);
-        }
-
-        return (leftVersion ?? new Version(0, 0, 0)).CompareTo(rightVersion ?? new Version(0, 0, 0));
-    }
-
-    private Border CreatePanelShell()
-    {
-        return new Border
-        {
-            Background = SurfaceBrush,
-            CornerRadius = new CornerRadius(18),
-            Padding = new Thickness(16)
-        };
-    }
-
-    private Control CreateEmptyState(string text)
-    {
-        return new Border
-        {
-            Background = SurfaceBrush,
-            CornerRadius = new CornerRadius(16),
-            Padding = new Thickness(18),
-            Child = new TextBlock
-            {
-                Text = text,
-                TextWrapping = TextWrapping.Wrap
-            }
-        };
-    }
-
-    private Border CreateMonogramIcon(string text, double size)
-    {
-        var glyph = string.IsNullOrWhiteSpace(text) ? "?" : text.Trim()[0].ToString().ToUpperInvariant();
-        return new Border
-        {
-            Width = size,
-            Height = size,
-            CornerRadius = new CornerRadius(size / 2),
-            Background = new SolidColorBrush(Color.Parse("#FF0EA5E9")),
-            Child = new TextBlock
-            {
-                Text = glyph,
-                FontSize = Math.Max(16, size * 0.36),
-                FontWeight = FontWeight.Bold,
-                HorizontalAlignment = HorizontalAlignment.Center,
-                VerticalAlignment = VerticalAlignment.Center,
-                TextAlignment = TextAlignment.Center
-            }
-        };
-    }
-
-    private Border CreateStateChip(string text)
-    {
-        return new Border
-        {
-            Background = new SolidColorBrush(Color.Parse("#22000000")),
-            CornerRadius = new CornerRadius(999),
-            Padding = new Thickness(10, 4),
-            Child = new TextBlock
-            {
-                Text = text,
-                FontSize = 12
-            }
-        };
-    }
-
-    private Control CreateInfoRow(string label, string value)
-    {
-        return new StackPanel
-        {
-            Spacing = 4,
-            Children =
-            {
-                new TextBlock
-                {
-                    Text = label,
-                    FontSize = 12,
-                    Foreground = Brushes.Gray
-                },
-                new TextBlock
-                {
-                    Text = string.IsNullOrWhiteSpace(value) ? T("market.detail.unknown", "未知") : value,
-                    TextWrapping = TextWrapping.Wrap
-                }
-            }
-        };
-    }
-
-    private string T(string key, string fallback)
-    {
-        return _localizer.GetString(key, fallback);
-    }
-
-    private string F(string key, string fallback, params object[] args)
-    {
-        return string.Format(CultureInfo.CurrentCulture, T(key, fallback), args);
-    }
-
-    private static string StateKey(AirAppMarketInstallState state)
-    {
-        return state switch
-        {
-            AirAppMarketInstallState.UpdateAvailable => "market.detail.state.update_available",
-            AirAppMarketInstallState.Installed => "market.detail.state.installed",
-            _ => "market.detail.state.not_installed"
-        };
-    }
-
-    private static string StateFallback(AirAppMarketInstallState state)
-    {
-        return state switch
-        {
-            AirAppMarketInstallState.UpdateAvailable => "可更新",
-            AirAppMarketInstallState.Installed => "已安装",
-            _ => "未安装"
-        };
-    }
-
-    private static string ButtonKey(AirAppMarketInstallState state)
-    {
-        return state switch
-        {
-            AirAppMarketInstallState.UpdateAvailable => "market.button.update",
-            AirAppMarketInstallState.Installed => "market.button.installed",
-            _ => "market.button.install"
-        };
-    }
-
-    private static string ButtonFallback(AirAppMarketInstallState state)
-    {
-        return state switch
-        {
-            AirAppMarketInstallState.UpdateAvailable => "更新",
-            AirAppMarketInstallState.Installed => "已安装",
-            _ => "安装"
-        };
-    }
-}

LanAirApp/plugins/LanMountainDesktop.PluginMarketplace/plugin.json

@@ -1,9 +0,0 @@
-{
-  "id": "LanMountainDesktop.PluginMarketplace",
-  "name": "LanMountain Plugin Marketplace",
-  "description": "Official plugin marketplace for browsing and installing LanMountainDesktop plugins.",
-  "author": "LanMountainDesktop",
-  "version": "1.0.0",
-  "apiVersion": "1.0.0",
-  "entranceAssembly": "LanMountainDesktop.PluginMarketplace.dll"
-}

LanMountainDesktop/Localization/en-US.json

@@ -338,10 +338,10 @@
     "settings.plugins.source_manifest":  "Loose manifest",
     "settings.plugins.subtitle_format":  "{0} | {1} | {2}",
     "settings.plugins.detail_format":  "Settings pages: {0} | Widgets: {1}",
-    "settings.plugins.market_header":  "Official Market",
+    "settings.nav.plugin_market":  "Plugin Market",
-    "settings.plugins.market_desc":  "Browse plugins from the official LanAirApp source and stage installs.",
+    "settings.plugin_market.title":  "Plugin Market",
-    "settings.plugins.market_hint":  "Use the official market source hosted in LanAirApp to discover and stage plugin installs.",
+    "settings.plugin_market.subtitle":  "Browse plugins from the official LanAirApp source and stage installs.",
-    "settings.plugins.market_unavailable":  "Plugin runtime is not available, so the official market cannot be opened right now.",
+    "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...",

LanMountainDesktop/Localization/zh-CN.json

@@ -338,10 +338,10 @@
     "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.plugins.market_header":  "官方市场",
+    "settings.nav.plugin_market":  "插件市场",
-    "settings.plugins.market_desc":  "浏览来自 LanAirApp 官方源的插件，并将安装暂存到本地。",
+    "settings.plugin_market.title":  "插件市场",
-    "settings.plugins.market_hint":  "这里使用托管在 LanAirApp 仓库中的官方市场索引来发现插件并暂存安装。",
+    "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.plugins.market_unavailable":  "插件运行时不可用，暂时无法打开官方市场。",
+    "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...",

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 +190,20 @@ public sealed class GitHubReleaseUpdateService : IDisposable
             return new UpdateDownloadResult(false, null, "Destination file path is empty.");
         }
 
-        try
+        var progressAdapter = progress is null
-        {
+            ? null
-            var directory = Path.GetDirectoryName(destinationFilePath);
+            : new Progress<DownloadProgressInfo>(info => progress.Report(info.Progress));
-            if (!string.IsNullOrWhiteSpace(directory))
-            {
-                Directory.CreateDirectory(directory);
-            }
 
-            using var response = await _httpClient.GetAsync(
+        var result = await _downloadService.DownloadAsync(
-                asset.BrowserDownloadUrl,
+            asset.BrowserDownloadUrl,
-                HttpCompletionOption.ResponseHeadersRead,
+            destinationFilePath,
-                cancellationToken);
+            new DownloadOptions(ExpectedSizeBytes: asset.SizeBytes > 0 ? asset.SizeBytes : null),
+            progressAdapter,
+            cancellationToken);
 
-            if (!response.IsSuccessStatusCode)
+        return result.Success
-            {
+            ? new UpdateDownloadResult(true, result.FilePath ?? destinationFilePath, null)
-                return new UpdateDownloadResult(
+            : new UpdateDownloadResult(false, null, result.ErrorMessage);
-                    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);
-        }
     }
 
     public async Task<GitHubReleaseInfo?> GetReleaseByTagAsync(

LanMountainDesktop/Services/ResumableDownloadService.cs

@@ -0,0 +1,940 @@
+using System;
+using System.Buffers;
+using System.Collections.Generic;
+using System.IO;
+using System.Linq;
+using System.Net;
+using System.Net.Http;
+using System.Net.Http.Headers;
+using System.Text.Json;
+using System.Threading;
+using System.Threading.Tasks;
+
+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 JsonSerializerOptions MetadataSerializerOptions = new()
+    {
+        WriteIndented = false
+    };
+
+    private readonly HttpClient _httpClient;
+
+    public ResumableDownloadService(HttpClient httpClient)
+    {
+        _httpClient = httpClient ?? throw new ArgumentNullException(nameof(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);
+        try
+        {
+            if (File.Exists(source))
+            {
+                return await CopyLocalFileAsync(
+                    source,
+                    destinationFilePath,
+                    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,
+                destinationFilePath,
+                normalizedOptions,
+                progress,
+                cancellationToken);
+        }
+        catch (OperationCanceledException)
+        {
+            throw;
+        }
+        catch (Exception ex)
+        {
+            return new DownloadResult(false, null, ex.Message, false, false);
+        }
+    }
+
+    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);
+        var metadataFilePath = BuildMetadataFilePath(fullDestinationPath);
+        PrepareDestination(fullDestinationPath);
+
+        if (CanReuseCompletedDestination(fullDestinationPath, totalBytes))
+        {
+            progress?.Report(new DownloadProgressInfo(totalBytes, totalBytes, 1d, false, false));
+            CleanupPartialArtifacts(tempFilePath, metadataFilePath);
+            return new DownloadResult(true, fullDestinationPath, null, false, false);
+        }
+
+        long existingBytes = 0;
+        if (File.Exists(tempFilePath))
+        {
+            existingBytes = new FileInfo(tempFilePath).Length;
+            if (existingBytes > totalBytes)
+            {
+                ResetPartialArtifacts(tempFilePath, metadataFilePath);
+                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)
+        {
+            CompleteDownload(tempFilePath, fullDestinationPath, metadataFilePath);
+            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,
+            isResuming: existingBytes > 0,
+            isParallel: false,
+            options.BufferSize,
+            progress,
+            cancellationToken);
+
+        CompleteDownload(tempFilePath, fullDestinationPath, metadataFilePath);
+        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)
+    {
+        var fullDestinationPath = Path.GetFullPath(destinationFilePath);
+        var tempFilePath = BuildTempFilePath(fullDestinationPath);
+        var metadataFilePath = BuildMetadataFilePath(fullDestinationPath);
+        PrepareDestination(fullDestinationPath);
+
+        var probe = await ProbeRemoteFileAsync(sourceUri, cancellationToken);
+        var totalBytes = probe.TotalBytes ?? options.ExpectedSizeBytes;
+        if (CanReuseCompletedDestination(fullDestinationPath, totalBytes))
+        {
+            progress?.Report(new DownloadProgressInfo(
+                totalBytes ?? new FileInfo(fullDestinationPath).Length,
+                totalBytes,
+                1d,
+                false,
+                false));
+            CleanupPartialArtifacts(tempFilePath, metadataFilePath);
+            return new DownloadResult(true, fullDestinationPath, null, false, false);
+        }
+
+        var canUseParallel = probe.SupportsRanges &&
+                             totalBytes is > 0 &&
+                             totalBytes.Value >= options.ParallelThresholdBytes &&
+                             options.MaxParallelSegments > 1;
+
+        try
+        {
+            var result = canUseParallel
+                ? await DownloadRemoteInParallelAsync(
+                    sourceUri,
+                    fullDestinationPath,
+                    tempFilePath,
+                    metadataFilePath,
+                    totalBytes!.Value,
+                    options,
+                    progress,
+                    cancellationToken)
+                : await DownloadRemoteSequentiallyAsync(
+                    sourceUri,
+                    fullDestinationPath,
+                    tempFilePath,
+                    metadataFilePath,
+                    totalBytes,
+                    probe.SupportsRanges,
+                    options,
+                    progress,
+                    cancellationToken);
+
+            return result;
+        }
+        catch (RangeRequestNotSupportedException)
+        {
+            ResetPartialArtifacts(tempFilePath, metadataFilePath);
+            return await DownloadRemoteSequentiallyAsync(
+                sourceUri,
+                fullDestinationPath,
+                tempFilePath,
+                metadataFilePath,
+                totalBytes,
+                allowResume: false,
+                options,
+                progress,
+                cancellationToken);
+        }
+    }
+
+    private async Task<DownloadResult> DownloadRemoteSequentiallyAsync(
+        Uri sourceUri,
+        string destinationFilePath,
+        string tempFilePath,
+        string metadataFilePath,
+        long? totalBytes,
+        bool allowResume,
+        DownloadOptions options,
+        IProgress<DownloadProgressInfo>? progress,
+        CancellationToken cancellationToken)
+    {
+        long existingBytes = 0;
+        if (File.Exists(tempFilePath))
+        {
+            existingBytes = new FileInfo(tempFilePath).Length;
+            if (totalBytes is > 0 && existingBytes > totalBytes.Value)
+            {
+                ResetPartialArtifacts(tempFilePath, metadataFilePath);
+                existingBytes = 0;
+            }
+        }
+
+        if (!allowResume && existingBytes > 0)
+        {
+            ResetPartialArtifacts(tempFilePath, metadataFilePath);
+            existingBytes = 0;
+        }
+
+        if (totalBytes is > 0 && existingBytes >= totalBytes.Value)
+        {
+            CompleteDownload(tempFilePath, destinationFilePath, metadataFilePath);
+            progress?.Report(new DownloadProgressInfo(totalBytes.Value, totalBytes, 1d, existingBytes > 0, false));
+            return new DownloadResult(true, destinationFilePath, null, existingBytes > 0, false);
+        }
+
+        using var request = new HttpRequestMessage(HttpMethod.Get, sourceUri);
+        if (allowResume && existingBytes > 0)
+        {
+            request.Headers.Range = new RangeHeaderValue(existingBytes, null);
+        }
+
+        using var response = await _httpClient.SendAsync(
+            request,
+            HttpCompletionOption.ResponseHeadersRead,
+            cancellationToken);
+
+        if (allowResume && existingBytes > 0)
+        {
+            if (response.StatusCode == HttpStatusCode.RequestedRangeNotSatisfiable && totalBytes is > 0 && existingBytes == totalBytes)
+            {
+                CompleteDownload(tempFilePath, destinationFilePath, metadataFilePath);
+                progress?.Report(new DownloadProgressInfo(totalBytes.Value, totalBytes, 1d, true, false));
+                return new DownloadResult(true, destinationFilePath, null, true, false);
+            }
+
+            if (response.StatusCode != HttpStatusCode.PartialContent)
+            {
+                throw new RangeRequestNotSupportedException("The server did not honor the resume range request.");
+            }
+        }
+
+        response.EnsureSuccessStatusCode();
+
+        await using var sourceStream = await response.Content.ReadAsStreamAsync(cancellationToken);
+        await using var destinationStream = new FileStream(
+            tempFilePath,
+            existingBytes > 0 ? FileMode.Open : FileMode.Create,
+            FileAccess.Write,
+            FileShare.Read,
+            options.BufferSize,
+            FileOptions.Asynchronous | FileOptions.SequentialScan);
+
+        if (existingBytes > 0)
+        {
+            destinationStream.Seek(existingBytes, SeekOrigin.Begin);
+        }
+
+        var effectiveTotalBytes = totalBytes;
+        if (effectiveTotalBytes is null && response.Content.Headers.ContentLength is > 0)
+        {
+            effectiveTotalBytes = existingBytes + response.Content.Headers.ContentLength.Value;
+        }
+
+        await CopyStreamAsync(
+            sourceStream,
+            destinationStream,
+            existingBytes,
+            effectiveTotalBytes,
+            isResuming: existingBytes > 0,
+            isParallel: false,
+            options.BufferSize,
+            progress,
+            cancellationToken);
+
+        CompleteDownload(tempFilePath, destinationFilePath, metadataFilePath);
+        return new DownloadResult(true, destinationFilePath, null, existingBytes > 0, false);
+    }
+
+    private async Task<DownloadResult> DownloadRemoteInParallelAsync(
+        Uri sourceUri,
+        string destinationFilePath,
+        string tempFilePath,
+        string metadataFilePath,
+        long totalBytes,
+        DownloadOptions options,
+        IProgress<DownloadProgressInfo>? progress,
+        CancellationToken cancellationToken)
+    {
+        var requestedSegments = Math.Min(options.MaxParallelSegments, CalculateRecommendedSegments(totalBytes));
+        var metadata = await LoadOrCreateMetadataAsync(
+            sourceUri,
+            tempFilePath,
+            metadataFilePath,
+            totalBytes,
+            requestedSegments,
+            cancellationToken);
+
+        await using (var tempStream = new FileStream(
+                         tempFilePath,
+                         FileMode.OpenOrCreate,
+                         FileAccess.Write,
+                         FileShare.ReadWrite,
+                         options.BufferSize,
+                         FileOptions.Asynchronous | FileOptions.RandomAccess))
+        {
+            if (tempStream.Length != totalBytes)
+            {
+                tempStream.SetLength(totalBytes);
+            }
+        }
+
+        var initialDownloadedBytes = metadata.Segments.Sum(segment => segment.CompletedBytes);
+        ReportProgress(progress, initialDownloadedBytes, totalBytes, initialDownloadedBytes > 0, true);
+
+        if (initialDownloadedBytes >= totalBytes)
+        {
+            CompleteDownload(tempFilePath, destinationFilePath, metadataFilePath);
+            return new DownloadResult(true, destinationFilePath, null, initialDownloadedBytes > 0, true);
+        }
+
+        long downloadedBytes = initialDownloadedBytes;
+        var metadataWriter = new MetadataWriter(metadataFilePath, metadata);
+
+        try
+        {
+            var tasks = metadata.Segments
+                .Where(segment => segment.CompletedBytes < segment.Length)
+                .Select(segment => DownloadSegmentAsync(
+                    sourceUri,
+                    tempFilePath,
+                    segment,
+                    options.BufferSize,
+                    delta =>
+                    {
+                        var currentDownloaded = Interlocked.Add(ref downloadedBytes, delta);
+                        ReportProgress(progress, currentDownloaded, totalBytes, initialDownloadedBytes > 0, true);
+                    },
+                    metadataWriter,
+                    cancellationToken))
+                .ToArray();
+
+            await Task.WhenAll(tasks);
+            await metadataWriter.FlushAsync(cancellationToken);
+        }
+        catch
+        {
+            await metadataWriter.FlushAsync(cancellationToken);
+            throw;
+        }
+
+        CompleteDownload(tempFilePath, destinationFilePath, metadataFilePath);
+        ReportProgress(progress, totalBytes, totalBytes, initialDownloadedBytes > 0, true);
+        return new DownloadResult(true, destinationFilePath, null, initialDownloadedBytes > 0, true);
+    }
+
+    private async Task DownloadSegmentAsync(
+        Uri sourceUri,
+        string tempFilePath,
+        DownloadSegmentState segment,
+        int bufferSize,
+        Action<int> reportDownloadedBytes,
+        MetadataWriter metadataWriter,
+        CancellationToken cancellationToken)
+    {
+        var rangeStart = segment.Start + segment.CompletedBytes;
+        if (rangeStart > segment.EndInclusive)
+        {
+            return;
+        }
+
+        using var request = new HttpRequestMessage(HttpMethod.Get, sourceUri);
+        request.Headers.Range = new RangeHeaderValue(rangeStart, segment.EndInclusive);
+
+        using var response = await _httpClient.SendAsync(
+            request,
+            HttpCompletionOption.ResponseHeadersRead,
+            cancellationToken);
+
+        if (response.StatusCode != HttpStatusCode.PartialContent)
+        {
+            throw new RangeRequestNotSupportedException(
+                $"The server returned HTTP {(int)response.StatusCode} for range {rangeStart}-{segment.EndInclusive}.");
+        }
+
+        response.EnsureSuccessStatusCode();
+
+        var contentRange = response.Content.Headers.ContentRange;
+        if (contentRange?.From != rangeStart || contentRange.To != segment.EndInclusive)
+        {
+            throw new RangeRequestNotSupportedException("The server returned an unexpected content range.");
+        }
+
+        await using var sourceStream = await response.Content.ReadAsStreamAsync(cancellationToken);
+        await using var destinationStream = new FileStream(
+            tempFilePath,
+            FileMode.Open,
+            FileAccess.Write,
+            FileShare.ReadWrite,
+            bufferSize,
+            FileOptions.Asynchronous | FileOptions.RandomAccess);
+        destinationStream.Seek(rangeStart, SeekOrigin.Begin);
+
+        var buffer = ArrayPool<byte>.Shared.Rent(bufferSize);
+        try
+        {
+            while (segment.CompletedBytes < segment.Length)
+            {
+                var remainingBytes = segment.Length - segment.CompletedBytes;
+                var readSize = (int)Math.Min(buffer.Length, remainingBytes);
+                var read = await sourceStream.ReadAsync(buffer.AsMemory(0, readSize), cancellationToken);
+                if (read <= 0)
+                {
+                    throw new EndOfStreamException(
+                        $"Unexpected end of stream while downloading range {segment.Start}-{segment.EndInclusive}.");
+                }
+
+                await destinationStream.WriteAsync(buffer.AsMemory(0, read), cancellationToken);
+                segment.CompletedBytes += read;
+                reportDownloadedBytes(read);
+                metadataWriter.MarkDirty();
+            }
+        }
+        finally
+        {
+            ArrayPool<byte>.Shared.Return(buffer);
+        }
+    }
+
+    private async Task<RemoteProbeResult> ProbeRemoteFileAsync(Uri sourceUri, CancellationToken cancellationToken)
+    {
+        long? totalBytes = null;
+        var supportsRanges = false;
+
+        try
+        {
+            using var headRequest = new HttpRequestMessage(HttpMethod.Head, sourceUri);
+            using var headResponse = await _httpClient.SendAsync(
+                headRequest,
+                HttpCompletionOption.ResponseHeadersRead,
+                cancellationToken);
+
+            if (headResponse.IsSuccessStatusCode)
+            {
+                totalBytes = headResponse.Content.Headers.ContentLength;
+                supportsRanges = headResponse.Headers.AcceptRanges.Any(
+                    value => string.Equals(value, "bytes", StringComparison.OrdinalIgnoreCase));
+            }
+        }
+        catch
+        {
+            // Fall back to a small range probe when HEAD is unsupported or blocked.
+        }
+
+        if (supportsRanges && totalBytes is > 0)
+        {
+            return new RemoteProbeResult(totalBytes, true);
+        }
+
+        using var rangeRequest = new HttpRequestMessage(HttpMethod.Get, sourceUri);
+        rangeRequest.Headers.Range = new RangeHeaderValue(0, 0);
+
+        using var rangeResponse = await _httpClient.SendAsync(
+            rangeRequest,
+            HttpCompletionOption.ResponseHeadersRead,
+            cancellationToken);
+
+        if (rangeResponse.StatusCode == HttpStatusCode.PartialContent)
+        {
+            totalBytes = rangeResponse.Content.Headers.ContentRange?.Length ?? totalBytes;
+            return new RemoteProbeResult(totalBytes, true);
+        }
+
+        rangeResponse.EnsureSuccessStatusCode();
+        totalBytes ??= rangeResponse.Content.Headers.ContentLength;
+        return new RemoteProbeResult(totalBytes, false);
+    }
+
+    private static async Task CopyStreamAsync(
+        Stream sourceStream,
+        Stream destinationStream,
+        long initialDownloadedBytes,
+        long? totalBytes,
+        bool isResuming,
+        bool isParallel,
+        int bufferSize,
+        IProgress<DownloadProgressInfo>? progress,
+        CancellationToken cancellationToken)
+    {
+        var buffer = ArrayPool<byte>.Shared.Rent(bufferSize);
+        var downloadedBytes = initialDownloadedBytes;
+        try
+        {
+            ReportProgress(progress, downloadedBytes, totalBytes, isResuming, isParallel);
+            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;
+                ReportProgress(progress, downloadedBytes, totalBytes, isResuming, isParallel);
+            }
+
+            await destinationStream.FlushAsync(cancellationToken);
+            ReportProgress(progress, downloadedBytes, totalBytes, isResuming, isParallel);
+        }
+        finally
+        {
+            ArrayPool<byte>.Shared.Return(buffer);
+        }
+    }
+
+    private static void ReportProgress(
+        IProgress<DownloadProgressInfo>? progress,
+        long downloadedBytes,
+        long? totalBytes,
+        bool isResuming,
+        bool isParallel)
+    {
+        if (progress is null)
+        {
+            return;
+        }
+
+        double normalizedProgress;
+        if (totalBytes is > 0)
+        {
+            normalizedProgress = Math.Clamp(downloadedBytes / (double)totalBytes.Value, 0d, 1d);
+        }
+        else
+        {
+            normalizedProgress = 0d;
+        }
+
+        progress.Report(new DownloadProgressInfo(
+            downloadedBytes,
+            totalBytes,
+            normalizedProgress,
+            isResuming,
+            isParallel));
+    }
+
+    private static async Task<DownloadMetadata> LoadOrCreateMetadataAsync(
+        Uri sourceUri,
+        string tempFilePath,
+        string metadataFilePath,
+        long totalBytes,
+        int segmentCount,
+        CancellationToken cancellationToken)
+    {
+        if (File.Exists(metadataFilePath))
+        {
+            try
+            {
+                var json = await File.ReadAllTextAsync(metadataFilePath, cancellationToken);
+                var metadata = JsonSerializer.Deserialize<SerializableDownloadMetadata>(json);
+                if (metadata is not null)
+                {
+                    var normalizedMetadata = metadata.ToRuntime();
+                    if (string.Equals(normalizedMetadata.Source, sourceUri.ToString(), StringComparison.OrdinalIgnoreCase) &&
+                        normalizedMetadata.TotalBytes == totalBytes &&
+                        normalizedMetadata.Segments.Count > 0)
+                    {
+                        return normalizedMetadata.Normalize();
+                    }
+                }
+            }
+            catch
+            {
+                // Reset invalid metadata below.
+            }
+        }
+
+        ResetPartialArtifacts(tempFilePath, metadataFilePath);
+        var createdMetadata = DownloadMetadata.Create(sourceUri.ToString(), totalBytes, segmentCount);
+        var serialized = JsonSerializer.Serialize(createdMetadata.ToSerializable(), MetadataSerializerOptions);
+        await File.WriteAllTextAsync(metadataFilePath, serialized, cancellationToken);
+        return createdMetadata;
+    }
+
+    private static DownloadOptions NormalizeOptions(DownloadOptions? options)
+    {
+        var normalized = options ?? new DownloadOptions();
+        var maxParallelSegments = Math.Clamp(normalized.MaxParallelSegments, 1, 8);
+        var parallelThresholdBytes = Math.Max(1_048_576, normalized.ParallelThresholdBytes);
+        var bufferSize = Math.Max(16 * 1024, normalized.BufferSize);
+        return normalized with
+        {
+            MaxParallelSegments = maxParallelSegments,
+            ParallelThresholdBytes = parallelThresholdBytes,
+            BufferSize = bufferSize
+        };
+    }
+
+    private static int CalculateRecommendedSegments(long totalBytes)
+    {
+        if (totalBytes < 16 * 1024 * 1024)
+        {
+            return 2;
+        }
+
+        if (totalBytes < 64 * 1024 * 1024)
+        {
+            return 4;
+        }
+
+        return 6;
+    }
+
+    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 CompleteDownload(string tempFilePath, string destinationFilePath, string metadataFilePath)
+    {
+        if (!File.Exists(tempFilePath))
+        {
+            return;
+        }
+
+        File.Move(tempFilePath, destinationFilePath, overwrite: true);
+        if (File.Exists(metadataFilePath))
+        {
+            File.Delete(metadataFilePath);
+        }
+    }
+
+    private static void CleanupPartialArtifacts(string tempFilePath, string metadataFilePath)
+    {
+        if (File.Exists(tempFilePath))
+        {
+            File.Delete(tempFilePath);
+        }
+
+        if (File.Exists(metadataFilePath))
+        {
+            File.Delete(metadataFilePath);
+        }
+    }
+
+    private static void ResetPartialArtifacts(string tempFilePath, string metadataFilePath)
+    {
+        CleanupPartialArtifacts(tempFilePath, metadataFilePath);
+    }
+
+    private static string BuildTempFilePath(string destinationFilePath) => destinationFilePath + ".part";
+
+    private static string BuildMetadataFilePath(string destinationFilePath) => destinationFilePath + ".part.json";
+
+    private sealed record RemoteProbeResult(long? TotalBytes, bool SupportsRanges);
+
+    private sealed class RangeRequestNotSupportedException : InvalidOperationException
+    {
+        public RangeRequestNotSupportedException(string message)
+            : base(message)
+        {
+        }
+    }
+
+    private sealed class MetadataWriter
+    {
+        private readonly string _metadataFilePath;
+        private readonly DownloadMetadata _metadata;
+        private readonly SemaphoreSlim _writeGate = new(1, 1);
+        private long _lastPersistedTickCount;
+        private int _dirty;
+
+        public MetadataWriter(string metadataFilePath, DownloadMetadata metadata)
+        {
+            _metadataFilePath = metadataFilePath;
+            _metadata = metadata;
+            _lastPersistedTickCount = Environment.TickCount64;
+        }
+
+        public void MarkDirty()
+        {
+            Interlocked.Exchange(ref _dirty, 1);
+            var now = Environment.TickCount64;
+            if (now - Interlocked.Read(ref _lastPersistedTickCount) < 750)
+            {
+                return;
+            }
+
+            _ = Task.Run(async () =>
+            {
+                try
+                {
+                    await FlushAsync(CancellationToken.None);
+                }
+                catch
+                {
+                    // The final flush still runs on completion/cancellation.
+                }
+            });
+        }
+
+        public async Task FlushAsync(CancellationToken cancellationToken)
+        {
+            if (Interlocked.Exchange(ref _dirty, 0) == 0 && File.Exists(_metadataFilePath))
+            {
+                return;
+            }
+
+            await _writeGate.WaitAsync(cancellationToken);
+            try
+            {
+                var json = JsonSerializer.Serialize(_metadata.ToSerializable(), MetadataSerializerOptions);
+                await File.WriteAllTextAsync(_metadataFilePath, json, cancellationToken);
+                Interlocked.Exchange(ref _lastPersistedTickCount, Environment.TickCount64);
+            }
+            finally
+            {
+                _writeGate.Release();
+            }
+        }
+    }
+
+    private sealed class DownloadMetadata
+    {
+        public string Source { get; init; } = string.Empty;
+
+        public long TotalBytes { get; init; }
+
+        public List<DownloadSegmentState> Segments { get; init; } = [];
+
+        public static DownloadMetadata Create(string source, long totalBytes, int segmentCount)
+        {
+            var segments = SplitIntoSegments(totalBytes, segmentCount)
+                .Select(range => new DownloadSegmentState(range.Start, range.EndInclusive, 0))
+                .ToList();
+
+            return new DownloadMetadata
+            {
+                Source = source,
+                TotalBytes = totalBytes,
+                Segments = segments
+            };
+        }
+
+        public DownloadMetadata Normalize()
+        {
+            foreach (var segment in Segments)
+            {
+                segment.CompletedBytes = Math.Clamp(segment.CompletedBytes, 0, segment.Length);
+            }
+
+            return this;
+        }
+
+        public SerializableDownloadMetadata ToSerializable()
+        {
+            return new SerializableDownloadMetadata
+            {
+                Source = Source,
+                TotalBytes = TotalBytes,
+                Segments = Segments
+                    .Select(segment => new SerializableDownloadSegment
+                    {
+                        Start = segment.Start,
+                        EndInclusive = segment.EndInclusive,
+                        CompletedBytes = segment.CompletedBytes
+                    })
+                    .ToList()
+            };
+        }
+    }
+
+    private sealed class DownloadSegmentState
+    {
+        public DownloadSegmentState(long start, long endInclusive, long completedBytes)
+        {
+            Start = start;
+            EndInclusive = endInclusive;
+            CompletedBytes = completedBytes;
+        }
+
+        public long Start { get; }
+
+        public long EndInclusive { get; }
+
+        public long Length => EndInclusive - Start + 1;
+
+        public long CompletedBytes { get; set; }
+    }
+
+    private sealed class SerializableDownloadMetadata
+    {
+        public string Source { get; init; } = string.Empty;
+
+        public long TotalBytes { get; init; }
+
+        public List<SerializableDownloadSegment> Segments { get; init; } = [];
+
+        public DownloadMetadata ToRuntime()
+        {
+            return new DownloadMetadata
+            {
+                Source = Source,
+                TotalBytes = TotalBytes,
+                Segments = Segments
+                    .Select(segment => new DownloadSegmentState(
+                        segment.Start,
+                        segment.EndInclusive,
+                        segment.CompletedBytes))
+                    .ToList()
+            };
+        }
+    }
+
+    private sealed class SerializableDownloadSegment
+    {
+        public long Start { get; init; }
+
+        public long EndInclusive { get; init; }
+
+        public long CompletedBytes { get; init; }
+    }
+
+    private static IEnumerable<(long Start, long EndInclusive)> SplitIntoSegments(long totalBytes, int segmentCount)
+    {
+        if (totalBytes <= 0)
+        {
+            yield break;
+        }
+
+        var normalizedSegmentCount = Math.Max(1, segmentCount);
+        var segmentSize = totalBytes / normalizedSegmentCount;
+        var remainder = totalBytes % normalizedSegmentCount;
+        long start = 0;
+
+        for (var index = 0; index < normalizedSegmentCount; index++)
+        {
+            var currentSegmentSize = segmentSize + (index < remainder ? 1 : 0);
+            if (currentSegmentSize <= 0)
+            {
+                continue;
+            }
+
+            var endInclusive = start + currentSegmentSize - 1;
+            yield return (start, endInclusive);
+            start = endInclusive + 1;
+        }
+    }
+}

LanMountainDesktop/Views/MainWindow.Localization.cs

@@ -119,6 +119,7 @@ public partial class MainWindow
         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");
@@ -283,6 +284,7 @@ public partial class MainWindow
         LauncherHiddenItemsEmptyTextBlock.Text = L("settings.launcher.hidden_empty", "No hidden items.");
 
         ApplyPluginSettingsLocalization();
+        ApplyPluginMarketSettingsLocalization();
 
         SettingsNavAboutItem.Content = L("settings.nav.about", "About");
         AboutPanelTitleTextBlock.Text = L("settings.about.title", "About");

LanMountainDesktop/Views/MainWindow.Settings.cs

@@ -115,7 +115,8 @@ public partial class MainWindow
             UpdateSettingsPanel is null ||
             LauncherSettingsPanel is null ||
             AboutSettingsPanel is null ||
-            PluginSettingsPanel is null)
+            PluginSettingsPanel is null ||
+            PluginMarketSettingsPanel is null)
         {
             return;
         }
@@ -133,6 +134,7 @@ public partial class MainWindow
         AboutSettingsPanel.IsVisible = tag == "About";
         LauncherSettingsPanel.IsVisible = tag == "Launcher";
         PluginSettingsPanel.IsVisible = tag == "Plugins";
+        PluginMarketSettingsPanel.IsVisible = tag == "PluginMarket";
         UpdatePluginSettingsPageVisibility(tag);
 
         if (tag == "Launcher")
@@ -140,6 +142,16 @@ public partial class MainWindow
             RenderLauncherHiddenItemsList();
         }
 
+        if (tag == "Plugins")
+        {
+            PluginSettingsPanel.RefreshFromRuntime();
+        }
+
+        if (tag == "PluginMarket")
+        {
+            PluginMarketSettingsPanel.RefreshFromRuntime();
+        }
+
         if (tag == "Grid")
         {
             UpdateGridPreviewLayout();

LanMountainDesktop/Views/MainWindow.axaml

@@ -436,6 +436,11 @@
                                         <ic:SymbolIconSource Symbol="PuzzlePiece" IconVariant="Regular" />
                                     </ui:NavigationViewItem.IconSource>
                                 </ui:NavigationViewItem>
+                                <ui:NavigationViewItem x:Name="SettingsNavPluginMarketItem" Content="插件市场" Tag="PluginMarket" ToolTip.Tip="插件市场">
+                                    <ui:NavigationViewItem.IconSource>
+                                        <ic:SymbolIconSource Symbol="PuzzlePiece" IconVariant="Regular" />
+                                    </ui:NavigationViewItem.IconSource>
+                                </ui:NavigationViewItem>
                             </ui:NavigationView.MenuItems>
 
                             <ScrollViewer x:Name="SettingsContentScrollViewer"
@@ -459,6 +464,7 @@
                                     <pages:LauncherSettingsPage x:Name="LauncherSettingsPanel" IsVisible="False" />
                                     <pages:AboutSettingsPage x:Name="AboutSettingsPanel" IsVisible="False" />
                                     <pages:PluginSettingsPage x:Name="PluginSettingsPanel" IsVisible="False" />
+                                    <pages:PluginMarketSettingsPage x:Name="PluginMarketSettingsPanel" IsVisible="False" />
                                 </Grid>
                             </ScrollViewer>
                         </ui:NavigationView>

LanMountainDesktop/Views/SettingsWindow.Core.cs

@@ -69,6 +69,7 @@ public partial class SettingsWindow
         AddSettingsNavItem(SettingsSecondaryNavHost, "Update", Symbol.ArrowSync, "Update");
         AddSettingsNavItem(SettingsSecondaryNavHost, "About", Symbol.Info, "About");
         AddSettingsNavItem(SettingsSecondaryNavHost, "Plugins", Symbol.PuzzlePiece, "Plugins");
+        AddSettingsNavItem(SettingsSecondaryNavHost, "PluginMarket", Symbol.PuzzlePiece, "Plugin Market");
     }
 
     private void OnSettingsNavItemClick(object? sender, RoutedEventArgs e)
@@ -229,6 +230,7 @@ public partial class SettingsWindow
         AboutSettingsPanel.IsVisible = tag == "About";
         LauncherSettingsPanel.IsVisible = tag == "Launcher";
         PluginSettingsPanel.IsVisible = tag == "Plugins";
+        PluginMarketSettingsPanel.IsVisible = tag == "PluginMarket";
         UpdatePluginSettingsPageVisibility(tag);
 
         if (tag == "Launcher")
@@ -236,6 +238,16 @@ public partial class SettingsWindow
             RenderLauncherHiddenItemsList();
         }
 
+        if (tag == "Plugins")
+        {
+            PluginSettingsPanel.RefreshFromRuntime();
+        }
+
+        if (tag == "PluginMarket")
+        {
+            PluginMarketSettingsPanel.RefreshFromRuntime();
+        }
+
         if (tag == "Grid")
         {
             UpdateGridPreviewLayout();

LanMountainDesktop/Views/SettingsWindow.Localization.cs

@@ -74,6 +74,7 @@ public partial class SettingsWindow
         SetSettingsNavItemLabel(GetSettingsNavItem("About"), L("settings.nav.about", "About"));
         SetSettingsNavItemLabel(GetSettingsNavItem("Launcher"), L("settings.nav.launcher", "App Launcher"));
         SetSettingsNavItemLabel(GetSettingsNavItem("Plugins"), L("settings.nav.plugins", "Plugins"));
+        SetSettingsNavItemLabel(GetSettingsNavItem("PluginMarket"), L("settings.nav.plugin_market", "Plugin Market"));
 
         WallpaperPanelTitleTextBlock.Text = L("settings.wallpaper.title", "Personalize your wallpaper");
         WallpaperPlacementSettingsExpander.Header = L("settings.wallpaper.placement_label", "Placement");
@@ -177,6 +178,7 @@ public partial class SettingsWindow
         LauncherHiddenItemsEmptyTextBlock.Text = L("settings.launcher.hidden_empty", "No hidden items.");
 
         ApplyPluginSettingsLocalization();
+        ApplyPluginMarketSettingsLocalization();
 
         AboutPanelTitleTextBlock.Text = L("settings.about.title", "About");
         VersionTextBlock.Text = Lf("settings.about.version_format", "Version: {0}", GetAppVersionText());

LanMountainDesktop/Views/SettingsWindow.axaml

@@ -253,6 +253,7 @@
                                     <pages:LauncherSettingsPage x:Name="LauncherSettingsPanel" IsVisible="False" />
                                     <pages:AboutSettingsPage x:Name="AboutSettingsPanel" IsVisible="False" />
                                     <pages:PluginSettingsPage x:Name="PluginSettingsPanel" IsVisible="False" />
+                                    <pages:PluginMarketSettingsPage x:Name="PluginMarketSettingsPanel" IsVisible="False" />
                                 </Grid>
                             </ScrollViewer>
                         </Border>

LanMountainDesktop/plugins/MainWindow.PluginMarketSettingsLocalization.cs

@@ -0,0 +1,9 @@
+namespace LanMountainDesktop.Views;
+
+public partial class MainWindow
+{
+    private void ApplyPluginMarketSettingsLocalization()
+    {
+        PluginMarketSettingsPanel.RefreshFromRuntime();
+    }
+}

LanMountainDesktop/plugins/MainWindow.PluginSettingsHost.cs

@@ -39,7 +39,7 @@ public partial class MainWindow
             .GroupBy(contribution => contribution.Plugin.Manifest.Id, StringComparer.OrdinalIgnoreCase)
             .ToDictionary(group => group.Key, group => group.Count(), StringComparer.OrdinalIgnoreCase);
 
-        var insertIndex = SettingsNavView.MenuItems.IndexOf(SettingsNavPluginsItem) + 1;
+        var insertIndex = SettingsNavView.MenuItems.IndexOf(SettingsNavPluginMarketItem) + 1;
         foreach (var contribution in contributions)
         {
             var tag = BuildPluginSettingsTag(contribution);

LanMountainDesktop/plugins/PluginMarketInstallService.cs

@@ -14,6 +14,7 @@ internal sealed class AirAppMarketInstallService : IDisposable
 {
     private readonly PluginRuntimeService _runtime;
     private readonly HttpClient _httpClient;
+    private readonly ResumableDownloadService _downloadService;
     private readonly AirAppMarketReleaseResolverService _releaseResolverService;
     private readonly string _downloadsDirectory;
 
@@ -26,6 +27,7 @@ internal sealed class AirAppMarketInstallService : IDisposable
             Timeout = TimeSpan.FromMinutes(2)
         };
         _httpClient.DefaultRequestHeaders.UserAgent.ParseAdd("LanMountainDesktop-PluginMarketplace/1.0");
+        _downloadService = new ResumableDownloadService(_httpClient);
         _releaseResolverService = new AirAppMarketReleaseResolverService(_httpClient);
     }
 
@@ -46,21 +48,27 @@ internal sealed class AirAppMarketInstallService : IDisposable
 
             if (AirAppMarketDefaults.TryResolveWorkspaceFile(resolvedDownloadUrl, out var localPackagePath))
             {
-                await using var sourceStream = File.OpenRead(localPackagePath);
+                var localCopyResult = await _downloadService.DownloadAsync(
-                await using var destinationStream = File.Create(downloadPath);
+                    localPackagePath,
-                await sourceStream.CopyToAsync(destinationStream, cancellationToken);
+                    downloadPath,
+                    new DownloadOptions(ExpectedSizeBytes: plugin.PackageSizeBytes),
+                    cancellationToken: cancellationToken);
+                if (!localCopyResult.Success)
+                {
+                    return new AirAppMarketInstallResult(false, null, localCopyResult.ErrorMessage);
+                }
             }
             else
             {
-                using var response = await _httpClient.GetAsync(
+                var downloadResult = await _downloadService.DownloadAsync(
                     resolvedDownloadUrl,
-                    HttpCompletionOption.ResponseHeadersRead,
+                    downloadPath,
-                    cancellationToken);
+                    new DownloadOptions(ExpectedSizeBytes: plugin.PackageSizeBytes),
-                response.EnsureSuccessStatusCode();
+                    cancellationToken: cancellationToken);
-
+                if (!downloadResult.Success)
-                await using var responseStream = await response.Content.ReadAsStreamAsync(cancellationToken);
+                {
-                await using var destinationStream = File.Create(downloadPath);
+                    return new AirAppMarketInstallResult(false, null, downloadResult.ErrorMessage);
-                await responseStream.CopyToAsync(destinationStream, cancellationToken);
+                }
             }
 
             await using var hashStream = File.OpenRead(downloadPath);

LanMountainDesktop/plugins/PluginMarketSettingsPage.axaml

@@ -0,0 +1,25 @@
+<UserControl xmlns="https://github.com/avaloniaui"
+             xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
+             xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
+             xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
+             mc:Ignorable="d"
+             d:DesignWidth="960"
+             d:DesignHeight="1000"
+             x:Class="LanMountainDesktop.Views.SettingsPages.PluginMarketSettingsPage">
+
+    <StackPanel x:Name="PluginMarketPanel"
+                Spacing="16">
+        <TextBlock x:Name="PluginMarketPanelTitleTextBlock"
+                   FontSize="24"
+                   FontWeight="SemiBold"
+                   Foreground="{DynamicResource AdaptiveTextPrimaryBrush}"
+                   Text="Plugin Market" />
+
+        <TextBlock x:Name="PluginMarketPanelSubtitleTextBlock"
+                   Foreground="{DynamicResource AdaptiveTextSecondaryBrush}"
+                   TextWrapping="Wrap"
+                   Text="Browse plugins from the official LanAirApp source and stage installs." />
+
+        <ContentControl x:Name="PluginMarketContentHost" />
+    </StackPanel>
+</UserControl>

LanMountainDesktop/plugins/PluginMarketSettingsPage.axaml.cs

@@ -0,0 +1,71 @@
+using Avalonia;
+using Avalonia.Controls;
+using Avalonia.Media;
+using LanMountainDesktop.Services;
+
+namespace LanMountainDesktop.Views.SettingsPages;
+
+public partial class PluginMarketSettingsPage : UserControl
+{
+    private readonly AppSettingsService _appSettingsService = new();
+    private readonly LocalizationService _localizationService = new();
+    private PluginMarketEmbeddedView? _pluginMarketView;
+
+    public PluginMarketSettingsPage()
+    {
+        InitializeComponent();
+        AttachedToVisualTree += (_, _) => RefreshFromRuntime();
+    }
+
+    public void RefreshFromRuntime()
+    {
+        PluginMarketPanelTitleTextBlock.Text = L("settings.plugin_market.title", "Plugin Market");
+        PluginMarketPanelSubtitleTextBlock.Text = L(
+            "settings.plugin_market.subtitle",
+            "Browse plugins from the official LanAirApp source and stage installs.");
+
+        var runtime = (Application.Current as App)?.PluginRuntimeService;
+        if (runtime is null)
+        {
+            PluginMarketContentHost.Content = CreateUnavailableState();
+            return;
+        }
+
+        if (_pluginMarketView is null)
+        {
+            _pluginMarketView = new PluginMarketEmbeddedView(runtime);
+        }
+
+        _pluginMarketView.RefreshLocalization();
+        _pluginMarketView.RefreshInstalledSnapshot();
+
+        if (!ReferenceEquals(PluginMarketContentHost.Content, _pluginMarketView))
+        {
+            PluginMarketContentHost.Content = _pluginMarketView;
+        }
+    }
+
+    private Control CreateUnavailableState()
+    {
+        return new Border
+        {
+            Background = new SolidColorBrush(Color.Parse("#14000000")),
+            CornerRadius = new CornerRadius(16),
+            Padding = new Thickness(16),
+            Child = new TextBlock
+            {
+                Text = L(
+                    "settings.plugin_market.unavailable",
+                    "Plugin runtime is not available, so the official market cannot be opened right now."),
+                TextWrapping = TextWrapping.Wrap,
+                Foreground = PluginMarketPanelSubtitleTextBlock.Foreground
+            }
+        };
+    }
+
+    private string L(string key, string fallback)
+    {
+        var snapshot = _appSettingsService.Load();
+        return _localizationService.GetString(snapshot.LanguageCode, key, fallback);
+    }
+}

LanMountainDesktop/plugins/PluginSettingsPage.Host.cs

@@ -21,7 +21,6 @@ public partial class PluginSettingsPage : UserControl
 
     private readonly AppSettingsService _appSettingsService = new();
     private readonly LocalizationService _localizationService = new();
-    private PluginMarketEmbeddedView? _pluginMarketView;
     private string? _packageImportStatusMessage;
     private bool _packageImportStatusIsError;
 
@@ -34,13 +33,6 @@ public partial class PluginSettingsPage : UserControl
     public void RefreshFromRuntime()
     {
         var runtime = (Application.Current as App)?.PluginRuntimeService;
-        PluginMarketSettingsExpander.Header = L("settings.plugins.market_header", "Official Market");
-        PluginMarketSettingsExpander.Description = L(
-            "settings.plugins.market_desc",
-            "Browse plugins from the official LanAirApp source and stage installs.");
-        PluginMarketDescriptionTextBlock.Text = L(
-            "settings.plugins.market_hint",
-            "Use the official market source hosted in LanAirApp to discover and stage plugin installs.");
         UpdateInstallerUi(runtime);
         if (runtime is null)
         {
@@ -48,33 +40,13 @@ public partial class PluginSettingsPage : UserControl
             PluginRuntimeSummaryPanel.Children.Clear();
             PluginCatalogItemsHost.Children.Clear();
             PluginRestartHintTextBlock.IsVisible = false;
-            PluginMarketContentHost.Content = CreateSummaryLine(
-                L("settings.plugins.market_unavailable", "Plugin runtime is not available, so the official market cannot be opened right now."));
             return;
         }
 
-        EnsurePluginMarketView(runtime);
-        _pluginMarketView?.RefreshLocalization();
-        _pluginMarketView?.RefreshInstalledSnapshot();
         BuildRuntimeSummary(runtime);
         BuildPluginCatalog(runtime);
     }
 
-    private void EnsurePluginMarketView(PluginRuntimeService runtime)
-    {
-        if (_pluginMarketView is null)
-        {
-            _pluginMarketView = new PluginMarketEmbeddedView(runtime);
-            PluginMarketContentHost.Content = _pluginMarketView;
-            return;
-        }
-
-        if (!ReferenceEquals(PluginMarketContentHost.Content, _pluginMarketView))
-        {
-            PluginMarketContentHost.Content = _pluginMarketView;
-        }
-    }
-
     private void UpdateInstallerUi(PluginRuntimeService? runtime)
     {
         InstallPluginPackageButton.Content = L("settings.plugins.install_button", "Open .laapp package");

LanMountainDesktop/plugins/PluginSettingsPage.axaml

@@ -83,24 +83,5 @@
             </ui:SettingsExpander>
         </Border>
 
-        <Border Classes="settings-expander-shell">
-            <ui:SettingsExpander x:Name="PluginMarketSettingsExpander"
-                                 Header="Official Market"
-                                 Description="Browse plugins from the official LanAirApp source and stage installs."
-                                 IsExpanded="True">
-                <ui:SettingsExpander.IconSource>
-                    <ui:FontIconSource Glyph="&#xe719;" FontFamily="{StaticResource SymbolThemeFontFamily}" />
-                </ui:SettingsExpander.IconSource>
-                <ui:SettingsExpander.Footer>
-                    <StackPanel Spacing="10">
-                        <TextBlock x:Name="PluginMarketDescriptionTextBlock"
-                                   Foreground="{DynamicResource AdaptiveTextSecondaryBrush}"
-                                   TextWrapping="Wrap"
-                                   Text="Use the official market source hosted in LanAirApp to discover and stage plugin installs." />
-                        <ContentControl x:Name="PluginMarketContentHost" />
-                    </StackPanel>
-                </ui:SettingsExpander.Footer>
-            </ui:SettingsExpander>
-        </Border>
     </StackPanel>
 </UserControl>

LanMountainDesktop/plugins/SettingsWindow.PluginMarketSettingsLocalization.cs

@@ -0,0 +1,9 @@
+namespace LanMountainDesktop.Views;
+
+public partial class SettingsWindow
+{
+    private void ApplyPluginMarketSettingsLocalization()
+    {
+        PluginMarketSettingsPanel.RefreshFromRuntime();
+    }
+}

airappmarket/assets/plugin-marketplace.svg

@@ -1,13 +0,0 @@
-<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 128 128" role="img" aria-label="Plugin Marketplace">
-  <defs>
-    <linearGradient id="marketBg" x1="0" x2="1" y1="0" y2="1">
-      <stop offset="0%" stop-color="#0EA5E9"/>
-      <stop offset="100%" stop-color="#22C55E"/>
-    </linearGradient>
-  </defs>
-  <rect x="8" y="8" width="112" height="112" rx="28" fill="url(#marketBg)"/>
-  <path d="M43 36h42c3.866 0 7 3.134 7 7v42c0 3.866-3.134 7-7 7H43c-3.866 0-7-3.134-7-7V43c0-3.866 3.134-7 7-7Z" fill="#FFFFFF" fill-opacity="0.16"/>
-  <path d="M52 52h24a12 12 0 0 1 0 24H52a8 8 0 0 1 0-16h4" fill="none" stroke="#FFFFFF" stroke-linecap="round" stroke-linejoin="round" stroke-width="10"/>
-  <circle cx="84" cy="84" r="14" fill="#FFFFFF"/>
-  <path d="M84 76v16M76 84h16" stroke="#0EA5E9" stroke-linecap="round" stroke-width="8"/>
-</svg>

airappmarket/index.json

@@ -2,31 +2,8 @@
   "schemaVersion": "1.0.0",
   "sourceId": "official.lanmountaindesktop",
   "sourceName": "LanMountainDesktop Official Market",
-  "generatedAt": "2026-03-10T01:30:00Z",
+  "generatedAt": "2026-03-10T11:10:00Z",
   "plugins": [
-    {
-      "id": "LanMountainDesktop.PluginMarketplace",
-      "name": "LanMountain Plugin Marketplace",
-      "description": "Official plugin marketplace for browsing and installing LanMountainDesktop plugins.",
-      "author": "LanMountainDesktop",
-      "version": "1.0.0",
-      "apiVersion": "1.0.0",
-      "minHostVersion": "1.0.0",
-      "downloadUrl": "https://raw.githubusercontent.com/wwiinnddyy/LanMountainDesktop/main/LanAirApp/releases/LanMountainDesktop.PluginMarketplace.1.0.0.laapp",
-      "sha256": "51e73bf834c4c3f8a32bc711e9db62b954e24a3577e580d6faa4c3986ce70e0b",
-      "packageSizeBytes": 1704353,
-      "iconUrl": "https://raw.githubusercontent.com/wwiinnddyy/LanMountainDesktop/main/airappmarket/assets/plugin-marketplace.svg",
-      "homepageUrl": "https://github.com/wwiinnddyy/LanMountainDesktop/tree/main/LanAirApp/plugins/LanMountainDesktop.PluginMarketplace",
-      "repositoryUrl": "https://github.com/wwiinnddyy/LanMountainDesktop/tree/main/LanAirApp/plugins/LanMountainDesktop.PluginMarketplace",
-      "tags": [
-        "official",
-        "market",
-        "settings"
-      ],
-      "publishedAt": "2026-03-10T01:30:00Z",
-      "updatedAt": "2026-03-10T01:30:00Z",
-      "releaseNotes": "Bootstrap plugin for the official LanMountainDesktop marketplace. Install it once from a local .laapp package, then use it to discover and stage future plugin installs and updates."
-    },
     {
       "id": "LanMountainDesktop.SamplePlugin",
       "name": "LanMountain Sample Plugin",