changed.velopack，试试rust

.github/workflows/code-quality.yml

@@ -25,7 +25,7 @@ jobs:
         with:
           fetch-depth: 0
           submodules: recursive
-          ref: ${{ github.event.pull_request.head.sha }}
+          ref: ${{ github.event_name == 'pull_request' && github.event.pull_request.head.sha || github.sha }}
 
       - name: Setup .NET
         uses: actions/setup-dotnet@v4

.github/workflows/release.yml

@@ -20,6 +20,7 @@ env:
   DOTNET_VERSION: '10.0.x'
   Solution_Name: LanMountainDesktop.slnx
   DOTNET_gcServer: 1
+  ENABLE_LEGACY_DELTA_FALLBACK: 'false'
 
 jobs:
   prepare:
@@ -109,7 +110,7 @@ jobs:
 
           Write-Host "Publishing Launcher with AOT for Windows $arch..."
 
-          # AOT 单文件发布
+          # AOT publish
           dotnet publish LanMountainDesktop.Launcher/LanMountainDesktop.Launcher.csproj `
             -c Release `
             -o ./$launcherPublishDir `
@@ -127,7 +128,7 @@ jobs:
             exit 1
           }
 
-          # 显示发布结果
+          # 鏄剧ず鍙戝竷缁撴灉
           Write-Host "Launcher published to: $launcherPublishDir"
           $exeFile = Get-ChildItem -Path $launcherPublishDir -Filter "*.exe" | Select-Object -First 1
           if ($exeFile) {
@@ -135,7 +136,7 @@ jobs:
             Write-Host "Launcher executable: $($exeFile.Name) ($size MB)"
           }
 
-          # 清理不必要的文件（AOT 单文件应该只有一个 exe）
+          # Warn if unexpected extra files are produced
           $files = Get-ChildItem -Path $launcherPublishDir -File
           if ($files.Count -gt 1) {
             Write-Host "Warning: Expected single file but found $($files.Count) files"
@@ -317,7 +318,42 @@ jobs:
           Write-Host "Installer size: $([Math]::Round($installerFile.Length / 1MB, 2)) MB"
         shell: pwsh
 
-      - name: Create App Package
+      - name: Install vpk
+        if: matrix.self_contained == true && matrix.arch == 'x64'
+        run: |
+          dotnet tool install --global vpk
+          echo "$env:USERPROFILE\\.dotnet\\tools" | Out-File -FilePath $env:GITHUB_PATH -Encoding utf8 -Append
+          vpk --version
+        shell: pwsh
+
+      - name: Prepare Previous Velopack Full Package
+        if: matrix.self_contained == true && matrix.arch == 'x64'
+        run: |
+          $outputDir = "velopack-output"
+          New-Item -ItemType Directory -Path $outputDir -Force | Out-Null
+
+          try {
+            $headers = @{ "User-Agent" = "LanMountainDesktop-CI"; "Authorization" = "token ${{ secrets.GITHUB_TOKEN }}" }
+            $releases = Invoke-RestMethod -Uri "https://api.github.com/repos/${{ github.repository }}/releases?per_page=10" -Headers $headers
+            $previousRelease = $releases | Where-Object { -not $_.prerelease -and -not $_.draft } | Select-Object -First 1
+            if ($previousRelease) {
+              $previousFull = $previousRelease.assets |
+                Where-Object { $_.name -like "*-full.nupkg" } |
+                Select-Object -First 1
+              if ($previousFull) {
+                $dest = Join-Path $outputDir $previousFull.name
+                Invoke-WebRequest -Uri $previousFull.browser_download_url -OutFile $dest -Headers $headers
+                Write-Host "Downloaded previous package for Velopack delta generation."
+              } else {
+                Write-Host "No previous full package found. Velopack will generate full package only."
+              }
+            }
+          } catch {
+            Write-Host "Could not fetch previous release package: $_"
+          }
+        shell: pwsh
+
+      - name: Build Velopack Packages
         if: matrix.self_contained == true && matrix.arch == 'x64'
         run: |
           $version = "${{ needs.prepare.outputs.version }}"
@@ -325,21 +361,33 @@ jobs:
           $publishDir = "publish/windows-$arch"
           $appDir = "app-$version"
           $currentAppPath = Join-Path $publishDir $appDir
-          $outputDir = "delta-output"
+          $outputDir = "velopack-output"
+
+          if (-not (Test-Path $currentAppPath)) {
+            Write-Error "Expected app directory not found: $currentAppPath"
+            exit 1
+          }
 
           New-Item -ItemType Directory -Path $outputDir -Force | Out-Null
+          vpk pack `
+            --packId LanMountainDesktop `
+            --packVersion $version `
+            --packDir $currentAppPath `
+            --mainExe LanMountainDesktop.exe `
+            --outputDir $outputDir `
+            --channel win `
+            --noPortable
 
-          # 创建 app-{version}-win-{arch}.zip 供后续版本作为旧版本对比
+          if ($LASTEXITCODE -ne 0) {
-          $appZipPath = Join-Path $outputDir "app-$version-win-$arch.zip"
+            Write-Error "Velopack packaging failed."
-          Write-Host "Creating app-$version-win-$arch.zip..."
+            exit 1
-          Compress-Archive -Path "$currentAppPath\*" -DestinationPath $appZipPath -CompressionLevel Optimal
+          }
 
-          $sizeMB = [Math]::Round((Get-Item $appZipPath).Length / 1MB, 2)
+          Get-ChildItem -Path $outputDir -File | Select-Object Name,Length
-          Write-Host "Created app-$version-win-$arch.zip: $sizeMB MB"
         shell: pwsh
 
-      - name: Generate Delta Package
+      - name: Legacy Delta Fallback (disabled by default)
-        if: matrix.self_contained == true && matrix.arch == 'x64'
+        if: matrix.self_contained == true && matrix.arch == 'x64' && env.ENABLE_LEGACY_DELTA_FALLBACK == 'true'
         run: |
           $version = "${{ needs.prepare.outputs.version }}"
           $arch = "${{ matrix.arch }}"
@@ -350,143 +398,26 @@ jobs:
           $scriptPath = "scripts/Generate-DeltaPackage.ps1"
 
           New-Item -ItemType Directory -Path $outputDir -Force | Out-Null
-
-          # --- Determine previous version and download its app package for diff ---
-          $previousVersion = $null
-          $previousAppPath = $null
-          try {
-            $headers = @{ "User-Agent" = "LanMountainDesktop-CI"; "Authorization" = "token ${{ secrets.GITHUB_TOKEN }}" }
-            $releases = Invoke-RestMethod -Uri "https://api.github.com/repos/${{ github.repository }}/releases?per_page=10" -Headers $headers
-            $previousRelease = $releases | Where-Object { -not $_.prerelease -and -not $_.draft } | Select-Object -First 1
-            if ($previousRelease) {
-              $previousVersion = $previousRelease.tag_name.TrimStart('v','V')
-              Write-Host "Previous release version: $previousVersion"
-
-              # 下载旧版本的 app-{version}-win-{arch}.zip
-              $prevAppZip = $previousRelease.assets | Where-Object { $_.name -eq "app-$previousVersion-win-$arch.zip" } | Select-Object -First 1
-              if ($prevAppZip) {
-                Write-Host "Found app-$previousVersion-win-$arch.zip in previous release - downloading for diff..."
-                $prevAppZipDest = Join-Path $outputDir "prev-app.zip"
-                Invoke-WebRequest -Uri $prevAppZip.browser_download_url -OutFile $prevAppZipDest -Headers $headers
-
-                # 解压 app-{version}.zip
-                $previousAppPath = Join-Path $outputDir "prev-app"
-                New-Item -ItemType Directory -Path $previousAppPath -Force | Out-Null
-                Expand-Archive -Path $prevAppZipDest -DestinationPath $previousAppPath -Force
-                Remove-Item -Path $prevAppZipDest -Force -ErrorAction SilentlyContinue
-
-                if ($previousAppPath -and (Test-Path $previousAppPath)) {
-                  $prevFileCount = (Get-ChildItem -Path $previousAppPath -Recurse -File).Count
-                  Write-Host "Extracted $prevFileCount files from previous version for diff"
-                }
-              } else {
-                Write-Host "No app-$previousVersion-win-$arch.zip found in previous release - will generate full package"
-                Write-Host "This is expected for the first release after this fix."
-              }
-            }
-          } catch {
-            Write-Host "Could not fetch previous release: $_"
-          }
-
-          # --- Generate delta package using the script ---
-          if ($previousAppPath -and (Test-Path $previousAppPath) -and $previousVersion) {
-            Write-Host "Generating delta package from $previousVersion to $version..."
-            & $scriptPath `
-              -PreviousVersion $previousVersion `
-              -CurrentVersion $version `
-              -PreviousDir $previousAppPath `
-              -CurrentDir $currentAppPath `
-              -OutputDir $outputDir
-
-            if ($LASTEXITCODE -ne 0) {
-              Write-Error "Generate-DeltaPackage.ps1 failed"
-              exit 1
-            }
-          } else {
-            Write-Host "No previous version available - generating full package..."
-            # Generate a "full" delta package (all files as "add")
           & $scriptPath `
             -PreviousVersion "0.0.0" `
             -CurrentVersion $version `
             -PreviousDir $currentAppPath `
             -CurrentDir $currentAppPath `
             -OutputDir $outputDir
-
-            if ($LASTEXITCODE -ne 0) {
-              Write-Error "Generate-DeltaPackage.ps1 failed"
-              exit 1
-            }
-          }
-
-          # Clean up previous version extraction
-          if ($previousAppPath -and (Test-Path $previousAppPath)) {
-            Remove-Item -Path $previousAppPath -Recurse -Force -ErrorAction SilentlyContinue
-          }
-
-          # Display results
-          $updateZipPath = Join-Path $outputDir "update.zip"
-          if (Test-Path $updateZipPath) {
-            $sizeMB = [Math]::Round((Get-Item $updateZipPath).Length / 1MB, 2)
-            Write-Host "Created update.zip: $sizeMB MB"
-          }
         shell: pwsh
 
-      - name: Sign File Map
+      - name: Upload Velopack Package
-        if: matrix.self_contained == true && matrix.arch == 'x64'
-        run: |
-          $outputDir = "delta-output"
-          $filesJsonPath = Join-Path $outputDir "files.json"
-          $signaturePath = Join-Path $outputDir "files.json.sig"
-
-          if (-not (Test-Path $filesJsonPath)) {
-            Write-Error "files.json not found at $filesJsonPath"
-            exit 1
-          }
-
-          $privateKeyPem = "${{ secrets.UPDATE_PRIVATE_KEY_PEM }}"
-          if ([string]::IsNullOrWhiteSpace($privateKeyPem)) {
-            Write-Warning "UPDATE_PRIVATE_KEY_PEM secret not configured - generating unsigned placeholder"
-            Set-Content -Path $signaturePath -Value "" -Encoding ASCII
-            exit 0
-          }
-
-          $privateKeyPath = Join-Path $env:RUNNER_TEMP "signing-key.pem"
-          Set-Content -Path $privateKeyPath -Value $privateKeyPem -Encoding ASCII
-
-          Add-Type -ReferencedAssemblies @("System.Security.Cryptography", "System.IO") -TypeDefinition @"
-          using System;
-          using System.IO;
-          using System.Security.Cryptography;
-          public class RsaSigner {
-              public static void Sign(string jsonPath, string keyPath, string sigPath) {
-                  var jsonBytes = File.ReadAllBytes(jsonPath);
-                  var rsa = RSA.Create();
-                  rsa.ImportFromPem(File.ReadAllText(keyPath));
-                  var sig = rsa.SignData(jsonBytes, HashAlgorithmName.SHA256, RSASignaturePadding.Pkcs1);
-                  File.WriteAllText(sigPath, Convert.ToBase64String(sig));
-              }
-          }
-          "@
-
-          [RsaSigner]::Sign($filesJsonPath, $privateKeyPath, $signaturePath)
-          Remove-Item -Path $privateKeyPath -Force
-
-          Write-Host "Signed files.json -> files.json.sig"
-        shell: pwsh
-
-      - name: Upload Delta Package
         if: matrix.self_contained == true && matrix.arch == 'x64'
         uses: actions/upload-artifact@v4
         with:
-          name: release-delta-windows-x64
+          name: release-velopack-windows-x64
           path: |
-            delta-output/files.json
+            velopack-output/*.nupkg
-            delta-output/files.json.sig
+            velopack-output/releases.win.json
-            delta-output/update.zip
+            velopack-output/assets.win.json
-            delta-output/app-*.zip
+            velopack-output/RELEASES
           if-no-files-found: error
           retention-days: 90
-
       - name: Upload Installer
         uses: actions/upload-artifact@v4
         with:
@@ -889,10 +820,8 @@ jobs:
           mkdir -p release-files
           # Copy installers and packages
           find artifacts -type f \( -name "*.exe" -o -name "*.deb" -o -name "*.dmg" \) -exec cp -v {} release-files/ \;
-          # Copy delta update files (files.json, files.json.sig, update.zip)
+          # Copy Velopack release feed and update packages
-          find artifacts -type f \( -name "files.json" -o -name "files.json.sig" -o -name "update.zip" \) -exec cp -v {} release-files/ \;
+          find artifacts -type f \( -name "releases.win.json" -o -name "assets.win.json" -o -name "RELEASES" -o -name "*.nupkg" \) -exec cp -v {} release-files/ \;
-          # Copy app package for future delta generation (app-{version}-win-{arch}.zip)
-          find artifacts -type f -name "app-*.zip" -exec cp -v {} release-files/ \;
           echo ""
           echo "Files ready for release:"
           ls -lh release-files/ || echo "No files found in release-files"
@@ -927,9 +856,9 @@ jobs:
             Installation: Double-click the .exe file and follow the wizard.
 
             ### Incremental Update (Windows x64)
-            - **files.json** - Update manifest listing changed files
+            - **releases.win.json** - Velopack release feed consumed by the launcher update flow
-            - **files.json.sig** - RSA signature of the manifest
+            - **LanMountainDesktop-<version>-full.nupkg** - full package
-            - **update.zip** - Archive containing changed files
+            - **LanMountainDesktop-<version>-delta.nupkg** - delta package (when available)
 
             Existing users: The app will automatically detect and apply the incremental update on next launch.
 

.trae/specs/velopack-update-integration/checklist.md

@@ -0,0 +1,7 @@
+# Checklist
+
+- [x] `releases.win.json` recognized by host update download flow.
+- [x] Launcher pending update check supports VeloPack payload.
+- [x] Launcher apply uses deployment markers (`.current/.partial/.destroy`) unchanged.
+- [x] Legacy script path retained as emergency fallback.
+- [ ] Staging verification report attached.

.trae/specs/velopack-update-integration/spec.md

@@ -0,0 +1,16 @@
+# VeloPack Update Integration
+
+## Goal
+Switch incremental package generation and release assets to VeloPack native outputs while keeping Launcher as the update installer and rollback authority.
+
+## Requirements
+- CI/release pipeline produces `releases.win.json` and `*.nupkg` assets for Windows x64.
+- Launcher can detect pending VeloPack payload in `.launcher/update/incoming`.
+- Launcher applies update into new `app-*` deployment and preserves rollback snapshot behavior.
+- Existing launcher responsibilities (OOBE/startup/plugin upgrade) remain unchanged.
+
+## Acceptance
+- Build and quality workflows pass after migration changes.
+- Release workflow publishes VeloPack assets.
+- Launcher `update apply` succeeds with VeloPack full package payload.
+- Manual rollback still works after a VeloPack-based update.

.trae/specs/velopack-update-integration/tasks.md

@@ -0,0 +1,9 @@
+# Tasks
+
+- [x] Fix Launcher `LoadingDetailsWindow.axaml` compile regression.
+- [x] Add VeloPack feed/package model support in Launcher update engine.
+- [x] Keep legacy delta flow behind disabled fallback switch.
+- [x] Migrate release workflow packaging assets to VeloPack outputs.
+- [x] Update host-side update workflow to download VeloPack payload files.
+- [ ] Run full release workflow dry-run on GitHub and validate artifacts.
+- [ ] Validate end-to-end update + rollback on a staging machine.

LanMountainDesktop.Launcher/AppJsonContext.cs

@@ -20,4 +20,7 @@ namespace LanMountainDesktop.Launcher;
 [JsonSerializable(typeof(GitHubRelease))]
 [JsonSerializable(typeof(GitHubAsset))]
 [JsonSerializable(typeof(List<GitHubRelease>))]
+[JsonSerializable(typeof(VelopackReleaseFeed))]
+[JsonSerializable(typeof(VelopackReleaseAsset))]
+[JsonSerializable(typeof(List<VelopackReleaseAsset>))]
 internal sealed partial class AppJsonContext : JsonSerializerContext;

LanMountainDesktop.Launcher/Models/ReleaseInfo.cs

@@ -11,6 +11,8 @@ public sealed class ReleaseInfo
     public required DateTime PublishedAt { get; init; }
     public required List<ReleaseAsset> Assets { get; init; }
     public string? Body { get; init; }
+    public string? VelopackFeedUrl { get; init; }
+    public string? VelopackLegacyReleasesUrl { get; init; }
 }
 
 /// <summary>

LanMountainDesktop.Launcher/Models/VelopackModels.cs

@@ -0,0 +1,23 @@
+namespace LanMountainDesktop.Launcher.Models;
+
+internal sealed class VelopackReleaseFeed
+{
+    public List<VelopackReleaseAsset> Assets { get; set; } = [];
+}
+
+internal sealed class VelopackReleaseAsset
+{
+    public string PackageId { get; set; } = string.Empty;
+
+    public string Version { get; set; } = string.Empty;
+
+    public string Type { get; set; } = string.Empty;
+
+    public string FileName { get; set; } = string.Empty;
+
+    public string? SHA1 { get; set; }
+
+    public string? SHA256 { get; set; }
+
+    public long Size { get; set; }
+}

LanMountainDesktop.Launcher/Services/Commands.cs

@@ -91,11 +91,7 @@ internal static class Commands
             "check" => updateEngine.CheckPendingUpdate(),
             "apply" => await updateEngine.ApplyPendingUpdateAsync().ConfigureAwait(false),
             "rollback" => updateEngine.RollbackLatest(),
-            "download" => await updateEngine.DownloadAsync(
+            "download" => await DownloadUpdatePayloadAsync(context, updateEngine).ConfigureAwait(false),
-                context.GetOption("manifest-url") ?? throw new InvalidOperationException("Missing --manifest-url."),
-                context.GetOption("signature-url") ?? throw new InvalidOperationException("Missing --signature-url."),
-                context.GetOption("archive-url") ?? throw new InvalidOperationException("Missing --archive-url."),
-                CancellationToken.None).ConfigureAwait(false),
             _ => new LauncherResult
             {
                 Success = false,
@@ -106,6 +102,35 @@ internal static class Commands
         };
     }
 
+    private static async Task<LauncherResult> DownloadUpdatePayloadAsync(CommandContext context, UpdateEngineService updateEngine)
+    {
+        var releasesUrl = context.GetOption("releases-url");
+        if (!string.IsNullOrWhiteSpace(releasesUrl))
+        {
+            var packageUrls = new List<string>();
+            var packageUrl = context.GetOption("package-url");
+            if (!string.IsNullOrWhiteSpace(packageUrl))
+            {
+                packageUrls.Add(packageUrl);
+            }
+
+            var packageUrlsCsv = context.GetOption("package-urls");
+            if (!string.IsNullOrWhiteSpace(packageUrlsCsv))
+            {
+                packageUrls.AddRange(packageUrlsCsv
+                    .Split(',', StringSplitOptions.RemoveEmptyEntries | StringSplitOptions.TrimEntries));
+            }
+
+            return await updateEngine.DownloadVelopackAsync(releasesUrl, packageUrls, CancellationToken.None).ConfigureAwait(false);
+        }
+
+        return await updateEngine.DownloadAsync(
+            context.GetOption("manifest-url") ?? throw new InvalidOperationException("Missing --manifest-url."),
+            context.GetOption("signature-url") ?? throw new InvalidOperationException("Missing --signature-url."),
+            context.GetOption("archive-url") ?? throw new InvalidOperationException("Missing --archive-url."),
+            CancellationToken.None).ConfigureAwait(false);
+    }
+
     private static LauncherResult ExecutePluginCommand(
         CommandContext context,
         PluginInstallerService pluginInstaller,

LanMountainDesktop.Launcher/Services/UpdateCheckService.cs

@@ -104,7 +104,11 @@ internal sealed class UpdateCheckService
                 Name = a.Name ?? "",
                 BrowserDownloadUrl = a.BrowserDownloadUrl ?? "",
                 Size = a.Size
-            }).ToList() ?? []
+            }).ToList() ?? [],
+            VelopackFeedUrl = r.Assets?.FirstOrDefault(a =>
+                string.Equals(a.Name, "releases.win.json", StringComparison.OrdinalIgnoreCase))?.BrowserDownloadUrl,
+            VelopackLegacyReleasesUrl = r.Assets?.FirstOrDefault(a =>
+                string.Equals(a.Name, "RELEASES", StringComparison.OrdinalIgnoreCase))?.BrowserDownloadUrl
         }).ToList() ?? [];
     }
 

LanMountainDesktop.Launcher/Services/UpdateEngineService.cs

@@ -14,6 +14,7 @@ internal sealed class UpdateEngineService
     private const string SignedFileMapName = "files.json";
     private const string SignatureFileName = "files.json.sig";
     private const string ArchiveFileName = "update.zip";
+    private const string VelopackReleasesFileName = "releases.win.json";
     private const string PublicKeyFileName = "public-key.pem";
 
     private readonly DeploymentLocator _deploymentLocator;
@@ -33,6 +34,16 @@ internal sealed class UpdateEngineService
 
     public LauncherResult CheckPendingUpdate()
     {
+        var velopackFeedPath = Path.Combine(_incomingRoot, VelopackReleasesFileName);
+        if (File.Exists(velopackFeedPath))
+        {
+            var velopackResult = CheckVelopackPendingUpdate(velopackFeedPath);
+            if (velopackResult is not null)
+            {
+                return velopackResult;
+            }
+        }
+
         var fileMapPath = Path.Combine(_incomingRoot, SignedFileMapName);
         var archivePath = Path.Combine(_incomingRoot, ArchiveFileName);
         var signaturePath = Path.Combine(_incomingRoot, SignatureFileName);
@@ -71,6 +82,47 @@ internal sealed class UpdateEngineService
         };
     }
 
+    public async Task<LauncherResult> DownloadVelopackAsync(
+        string releasesJsonUrl,
+        IReadOnlyList<string> packageUrls,
+        CancellationToken cancellationToken)
+    {
+        if (string.IsNullOrWhiteSpace(releasesJsonUrl))
+        {
+            return Failed("update.download", "invalid_argument", "Missing releases feed url.");
+        }
+
+        Directory.CreateDirectory(_incomingRoot);
+
+        using var client = new HttpClient
+        {
+            Timeout = TimeSpan.FromMinutes(2)
+        };
+
+        var releasesPath = Path.Combine(_incomingRoot, VelopackReleasesFileName);
+        await DownloadToFileAsync(client, releasesJsonUrl, releasesPath, cancellationToken).ConfigureAwait(false);
+
+        foreach (var url in packageUrls.Where(u => !string.IsNullOrWhiteSpace(u)).Distinct(StringComparer.OrdinalIgnoreCase))
+        {
+            var fileName = Path.GetFileName(new Uri(url).AbsolutePath);
+            if (string.IsNullOrWhiteSpace(fileName))
+            {
+                continue;
+            }
+
+            var destination = Path.Combine(_incomingRoot, fileName);
+            await DownloadToFileAsync(client, url, destination, cancellationToken).ConfigureAwait(false);
+        }
+
+        return new LauncherResult
+        {
+            Success = true,
+            Stage = "update.download",
+            Code = "ok",
+            Message = "Velopack update payload downloaded."
+        };
+    }
+
     public async Task<LauncherResult> DownloadAsync(string manifestUrl, string signatureUrl, string archiveUrl, CancellationToken cancellationToken)
     {
         Directory.CreateDirectory(_incomingRoot);
@@ -115,6 +167,12 @@ internal sealed class UpdateEngineService
         Directory.CreateDirectory(_incomingRoot);
         Directory.CreateDirectory(_snapshotsRoot);
 
+        var velopackFeedPath = Path.Combine(_incomingRoot, VelopackReleasesFileName);
+        if (File.Exists(velopackFeedPath))
+        {
+            return await ApplyVelopackPendingUpdateAsync(velopackFeedPath).ConfigureAwait(false);
+        }
+
         var fileMapPath = Path.Combine(_incomingRoot, SignedFileMapName);
         var signaturePath = Path.Combine(_incomingRoot, SignatureFileName);
         var archivePath = Path.Combine(_incomingRoot, ArchiveFileName);
@@ -573,7 +631,8 @@ internal sealed class UpdateEngineService
                  {
                      Path.Combine(_incomingRoot, SignedFileMapName),
                      Path.Combine(_incomingRoot, SignatureFileName),
-                     Path.Combine(_incomingRoot, ArchiveFileName)
+                     Path.Combine(_incomingRoot, ArchiveFileName),
+                     Path.Combine(_incomingRoot, VelopackReleasesFileName)
                  })
         {
             try
@@ -587,6 +646,17 @@ internal sealed class UpdateEngineService
             {
             }
         }
+
+        try
+        {
+            foreach (var nupkgPath in Directory.EnumerateFiles(_incomingRoot, "*.nupkg", SearchOption.TopDirectoryOnly))
+            {
+                File.Delete(nupkgPath);
+            }
+        }
+        catch
+        {
+        }
     }
 
     private (bool Success, string Message) VerifySignature(string fileMapPath, string signaturePath)
@@ -654,6 +724,307 @@ internal sealed class UpdateEngineService
         return Convert.ToHexString(hash).ToLowerInvariant();
     }
 
+    private LauncherResult? CheckVelopackPendingUpdate(string feedPath)
+    {
+        try
+        {
+            var feed = JsonSerializer.Deserialize(File.ReadAllText(feedPath), AppJsonContext.Default.VelopackReleaseFeed);
+            if (feed?.Assets is null || feed.Assets.Count == 0)
+            {
+                return Failed("update.check", "invalid_manifest", "releases.win.json is invalid.");
+            }
+
+            var currentVersion = ParseVersionSafe(_deploymentLocator.GetCurrentVersion());
+            var latest = feed.Assets
+                .Where(a => string.Equals(a.Type, "Full", StringComparison.OrdinalIgnoreCase))
+                .Select(a => new { Asset = a, Version = ParseVersionSafe(a.Version) })
+                .Where(x => x.Version > currentVersion)
+                .OrderByDescending(x => x.Version)
+                .FirstOrDefault();
+
+            if (latest is null)
+            {
+                return new LauncherResult
+                {
+                    Success = true,
+                    Stage = "update.check",
+                    Code = "noop",
+                    Message = "No pending update for current version."
+                };
+            }
+
+            var packagePath = Path.Combine(_incomingRoot, latest.Asset.FileName);
+            if (!File.Exists(packagePath))
+            {
+                return Failed("update.check", "missing_payload", $"Missing Velopack package '{latest.Asset.FileName}'.");
+            }
+
+            return new LauncherResult
+            {
+                Success = true,
+                Stage = "update.check",
+                Code = "available",
+                Message = "Pending Velopack update is available.",
+                CurrentVersion = _deploymentLocator.GetCurrentVersion(),
+                TargetVersion = latest.Asset.Version
+            };
+        }
+        catch (Exception ex)
+        {
+            return Failed("update.check", "invalid_manifest", ex.Message);
+        }
+    }
+
+    private async Task<LauncherResult> ApplyVelopackPendingUpdateAsync(string feedPath)
+    {
+        VelopackReleaseFeed? feed;
+        try
+        {
+            var json = await File.ReadAllTextAsync(feedPath).ConfigureAwait(false);
+            feed = JsonSerializer.Deserialize(json, AppJsonContext.Default.VelopackReleaseFeed);
+        }
+        catch (Exception ex)
+        {
+            return Failed("update.apply", "invalid_manifest", $"Invalid releases feed: {ex.Message}");
+        }
+
+        if (feed?.Assets is null || feed.Assets.Count == 0)
+        {
+            return Failed("update.apply", "invalid_manifest", "releases.win.json has no assets.");
+        }
+
+        var currentDeployment = _deploymentLocator.FindCurrentDeploymentDirectory();
+        if (string.IsNullOrWhiteSpace(currentDeployment))
+        {
+            return Failed("update.apply", "no_current_deployment", "Current deployment not found.");
+        }
+
+        var currentVersionText = _deploymentLocator.GetCurrentVersion();
+        var currentVersion = ParseVersionSafe(currentVersionText);
+        var target = feed.Assets
+            .Where(a => string.Equals(a.Type, "Full", StringComparison.OrdinalIgnoreCase))
+            .Select(a => new { Asset = a, Version = ParseVersionSafe(a.Version) })
+            .Where(x => x.Version > currentVersion)
+            .OrderByDescending(x => x.Version)
+            .FirstOrDefault();
+
+        if (target is null)
+        {
+            return new LauncherResult
+            {
+                Success = true,
+                Stage = "update.apply",
+                Code = "noop",
+                Message = "No Velopack update payload found."
+            };
+        }
+
+        var packagePath = Path.Combine(_incomingRoot, target.Asset.FileName);
+        if (!File.Exists(packagePath))
+        {
+            return Failed("update.apply", "missing_payload", $"Missing Velopack package '{target.Asset.FileName}'.");
+        }
+
+        if (!VerifyVelopackPackageChecksum(packagePath, target.Asset))
+        {
+            return Failed("update.apply", "checksum_failed", "Velopack package checksum verification failed.");
+        }
+
+        var targetVersion = string.IsNullOrWhiteSpace(target.Asset.Version) ? currentVersionText : target.Asset.Version;
+        var targetDeployment = _deploymentLocator.BuildNextDeploymentDirectory(targetVersion);
+        var partialMarker = Path.Combine(targetDeployment, ".partial");
+        var snapshot = new SnapshotMetadata
+        {
+            SnapshotId = Guid.NewGuid().ToString("N"),
+            SourceVersion = currentVersionText,
+            TargetVersion = targetVersion,
+            CreatedAt = DateTimeOffset.UtcNow,
+            SourceDirectory = currentDeployment,
+            TargetDirectory = targetDeployment,
+            Status = "pending"
+        };
+        var snapshotPath = Path.Combine(_snapshotsRoot, $"{snapshot.SnapshotId}.json");
+        var extractRoot = Path.Combine(_incomingRoot, "extracted-velopack");
+
+        try
+        {
+            SaveSnapshot(snapshotPath, snapshot);
+
+            if (Directory.Exists(extractRoot))
+            {
+                Directory.Delete(extractRoot, true);
+            }
+
+            Directory.CreateDirectory(extractRoot);
+            ZipFile.ExtractToDirectory(packagePath, extractRoot, overwriteFiles: true);
+
+            var contentRoot = ResolveVelopackContentRoot(extractRoot);
+            if (contentRoot is null)
+            {
+                throw new InvalidOperationException("Unable to locate app payload in Velopack package.");
+            }
+
+            Directory.CreateDirectory(targetDeployment);
+            File.WriteAllText(partialMarker, string.Empty);
+            CopyDirectory(contentRoot, targetDeployment);
+
+            var hostExecutable = OperatingSystem.IsWindows() ? "LanMountainDesktop.exe" : "LanMountainDesktop";
+            if (!File.Exists(Path.Combine(targetDeployment, hostExecutable)))
+            {
+                throw new InvalidOperationException($"Host executable '{hostExecutable}' not found after applying Velopack package.");
+            }
+
+            ActivateDeployment(currentDeployment, targetDeployment);
+            snapshot.Status = "applied";
+            SaveSnapshot(snapshotPath, snapshot);
+            CleanupIncomingArtifacts();
+            CleanupDestroyedDeployments();
+
+            return new LauncherResult
+            {
+                Success = true,
+                Stage = "update.apply",
+                Code = "ok",
+                Message = $"Updated to {targetVersion}.",
+                CurrentVersion = currentVersionText,
+                TargetVersion = targetVersion
+            };
+        }
+        catch (Exception ex)
+        {
+            TryRollbackOnFailure(snapshot);
+            snapshot.Status = "rolled_back";
+            SaveSnapshot(snapshotPath, snapshot);
+            return new LauncherResult
+            {
+                Success = false,
+                Stage = "update.apply",
+                Code = "apply_failed",
+                Message = "Failed to apply update. Rolled back to previous version.",
+                ErrorMessage = ex.Message,
+                CurrentVersion = currentVersionText,
+                RolledBackTo = currentVersionText
+            };
+        }
+        finally
+        {
+            try
+            {
+                if (Directory.Exists(extractRoot))
+                {
+                    Directory.Delete(extractRoot, true);
+                }
+            }
+            catch
+            {
+            }
+        }
+    }
+
+    private static Version ParseVersionSafe(string? version)
+    {
+        if (string.IsNullOrWhiteSpace(version))
+        {
+            return new Version(0, 0, 0);
+        }
+
+        var normalized = version.Trim();
+        var separatorIndex = normalized.IndexOfAny(['-', '+', ' ']);
+        if (separatorIndex > 0)
+        {
+            normalized = normalized[..separatorIndex];
+        }
+
+        return Version.TryParse(normalized, out var parsed) ? parsed : new Version(0, 0, 0);
+    }
+
+    private static bool VerifyVelopackPackageChecksum(string packagePath, VelopackReleaseAsset asset)
+    {
+        try
+        {
+            if (!string.IsNullOrWhiteSpace(asset.SHA256))
+            {
+                var actualSha256 = ComputeSha256Hex(packagePath);
+                return string.Equals(actualSha256, asset.SHA256, StringComparison.OrdinalIgnoreCase);
+            }
+
+            if (!string.IsNullOrWhiteSpace(asset.SHA1))
+            {
+                using var stream = File.OpenRead(packagePath);
+                var sha1 = SHA1.HashData(stream);
+                var actualSha1 = Convert.ToHexString(sha1);
+                return string.Equals(actualSha1, asset.SHA1, StringComparison.OrdinalIgnoreCase);
+            }
+
+            return true;
+        }
+        catch
+        {
+            return false;
+        }
+    }
+
+    private static string? ResolveVelopackContentRoot(string extractRoot)
+    {
+        var hostExecutable = OperatingSystem.IsWindows() ? "LanMountainDesktop.exe" : "LanMountainDesktop";
+        var hostPath = Directory
+            .EnumerateFiles(extractRoot, hostExecutable, SearchOption.AllDirectories)
+            .FirstOrDefault();
+        if (!string.IsNullOrWhiteSpace(hostPath))
+        {
+            return Path.GetDirectoryName(hostPath);
+        }
+
+        // common nupkg layout fallback
+        var libRoot = Path.Combine(extractRoot, "lib");
+        if (Directory.Exists(libRoot))
+        {
+            var best = Directory.GetDirectories(libRoot, "*", SearchOption.TopDirectoryOnly)
+                .OrderByDescending(d => Directory.EnumerateFiles(d, "*", SearchOption.AllDirectories).Count())
+                .FirstOrDefault();
+            if (!string.IsNullOrWhiteSpace(best))
+            {
+                return best;
+            }
+        }
+
+        var candidate = Directory.GetDirectories(extractRoot, "*", SearchOption.TopDirectoryOnly)
+            .Where(d => !string.Equals(Path.GetFileName(d), "_rels", StringComparison.OrdinalIgnoreCase))
+            .Where(d => !string.Equals(Path.GetFileName(d), "package", StringComparison.OrdinalIgnoreCase))
+            .OrderByDescending(d => Directory.EnumerateFiles(d, "*", SearchOption.AllDirectories).Count())
+            .FirstOrDefault();
+
+        return candidate;
+    }
+
+    private static void CopyDirectory(string sourceDir, string targetDir)
+    {
+        foreach (var dirPath in Directory.EnumerateDirectories(sourceDir, "*", SearchOption.AllDirectories))
+        {
+            var relative = Path.GetRelativePath(sourceDir, dirPath);
+            Directory.CreateDirectory(Path.Combine(targetDir, relative));
+        }
+
+        foreach (var sourceFile in Directory.EnumerateFiles(sourceDir, "*", SearchOption.AllDirectories))
+        {
+            var relative = Path.GetRelativePath(sourceDir, sourceFile);
+            var destFile = Path.Combine(targetDir, relative);
+            var destDir = Path.GetDirectoryName(destFile);
+            if (!string.IsNullOrWhiteSpace(destDir))
+            {
+                Directory.CreateDirectory(destDir);
+            }
+            File.Copy(sourceFile, destFile, overwrite: true);
+        }
+    }
+
+    private static async Task DownloadToFileAsync(HttpClient client, string url, string destination, CancellationToken cancellationToken)
+    {
+        await using var stream = await client.GetStreamAsync(url, cancellationToken).ConfigureAwait(false);
+        await using var output = File.Create(destination);
+        await stream.CopyToAsync(output, cancellationToken).ConfigureAwait(false);
+    }
+
     private static void SaveSnapshot(string path, SnapshotMetadata snapshot)
     {
         File.WriteAllText(path, JsonSerializer.Serialize(snapshot, AppJsonContext.Default.SnapshotMetadata));

LanMountainDesktop.Launcher/Views/LoadingDetailsWindow.axaml

@@ -1,12 +1,13 @@
-<Window xmlns="https://github.com/avaloniaui"
+<Window xmlns="https://github.com/avaloniaui"
         xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
         xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
         xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
+        xmlns:views="clr-namespace:LanMountainDesktop.Launcher.Views"
         mc:Ignorable="d"
         d:DesignWidth="600"
         d:DesignHeight="500"
         x:Class="LanMountainDesktop.Launcher.Views.LoadingDetailsWindow"
-        Title="阑山桌面 - 加载详情"
+        Title="LanMountain Desktop - Loading Details"
         Width="600"
         Height="500"
         WindowStartupLocation="CenterScreen"
@@ -17,18 +18,17 @@
         Icon="/Assets/logo.ico">
 
   <Grid RowDefinitions="Auto,*,Auto,Auto">
-    <!-- 标题栏 -->
     <Border Grid.Row="0"
             Background="{DynamicResource CardBackgroundFillColorDefaultBrush}"
             Padding="20,16">
       <Grid ColumnDefinitions="*,Auto">
         <StackPanel Grid.Column="0" Spacing="4">
-          <TextBlock Text="正在启动阑山桌面"
+          <TextBlock Text="Starting LanMountain Desktop"
                      FontSize="18"
                      FontWeight="SemiBold"
                      Foreground="{DynamicResource TextFillColorPrimaryBrush}"/>
           <TextBlock x:Name="SubtitleText"
-                     Text="初始化系统组件..."
+                     Text="Initializing..."
                      FontSize="13"
                      Foreground="{DynamicResource TextFillColorSecondaryBrush}"/>
         </StackPanel>
@@ -46,7 +46,6 @@
       </Grid>
     </Border>
 
-    <!-- 主要内容区域 -->
     <Grid Grid.Row="1" Margin="16,12">
       <Grid.RowDefinitions>
         <RowDefinition Height="Auto"/>
@@ -54,7 +53,6 @@
         <RowDefinition Height="*"/>
       </Grid.RowDefinitions>
 
-      <!-- 整体进度条 -->
       <ProgressBar x:Name="OverallProgressBar"
                    Grid.Row="0"
                    Height="8"
@@ -64,14 +62,12 @@
                    CornerRadius="4"
                    Margin="0,0,0,16"/>
 
-      <!-- 当前活动项 -->
       <Border Grid.Row="1"
               Background="{DynamicResource CardBackgroundFillColorSecondaryBrush}"
               CornerRadius="8"
               Padding="16,12"
               Margin="0,0,0,12">
         <Grid RowDefinitions="Auto,Auto,Auto" ColumnDefinitions="Auto,*">
-          <!-- 图标 -->
           <Border Grid.Row="0" Grid.RowSpan="3" Grid.Column="0"
                   Width="40"
                   Height="40"
@@ -88,23 +84,20 @@
                        VerticalAlignment="Center"/>
           </Border>
 
-          <!-- 名称 -->
           <TextBlock x:Name="CurrentItemName"
                      Grid.Row="0" Grid.Column="1"
-                     Text="正在初始化..."
+                     Text="Initializing..."
                      FontSize="15"
                      FontWeight="SemiBold"
                      Foreground="{DynamicResource TextFillColorPrimaryBrush}"/>
 
-          <!-- 描述 -->
           <TextBlock x:Name="CurrentItemDescription"
                      Grid.Row="1" Grid.Column="1"
-                     Text="准备加载系统组件"
+                     Text="Preparing components"
                      FontSize="13"
                      Foreground="{DynamicResource TextFillColorSecondaryBrush}"
                      Margin="0,4,0,0"/>
 
-          <!-- 进度 -->
           <Grid Grid.Row="2" Grid.Column="1" Margin="0,8,0,0">
             <ProgressBar x:Name="CurrentItemProgress"
                          Height="4"
@@ -116,15 +109,13 @@
         </Grid>
       </Border>
 
-      <!-- 加载项列表 -->
       <Border Grid.Row="2"
               Background="{DynamicResource CardBackgroundFillColorDefaultBrush}"
               CornerRadius="8">
         <Grid RowDefinitions="Auto,*">
-          <!-- 列表标题 -->
           <Grid Grid.Row="0" Margin="12,8" ColumnDefinitions="*,Auto,Auto">
             <TextBlock Grid.Column="0"
-                       Text="加载项"
+                       Text="Loading Items"
                        FontSize="12"
                        FontWeight="SemiBold"
                        Foreground="{DynamicResource TextFillColorTertiaryBrush}"/>
@@ -135,22 +126,20 @@
                        Foreground="{DynamicResource TextFillColorSecondaryBrush}"
                        Margin="0,0,4,0"/>
             <TextBlock Grid.Column="2"
-                       Text="已完成"
+                       Text="Done"
                        FontSize="12"
                        Foreground="{DynamicResource TextFillColorTertiaryBrush}"/>
           </Grid>
 
-          <!-- 列表内容 -->
           <ScrollViewer Grid.Row="1"
                         VerticalScrollBarVisibility="Auto"
                         Margin="8,0,8,8">
             <ItemsControl x:Name="LoadingItemsList">
               <ItemsControl.ItemTemplate>
-                <DataTemplate>
+                <DataTemplate DataType="views:LoadingItemViewModel">
                   <Grid ColumnDefinitions="Auto,*,Auto,Auto"
                         Margin="4,3"
                         Opacity="{Binding Opacity}">
-                    <!-- 状态图标 -->
                     <TextBlock Grid.Column="0"
                                Text="{Binding StatusIcon}"
                                FontSize="14"
@@ -159,7 +148,6 @@
                                Margin="0,0,8,0"
                                VerticalAlignment="Center"/>
 
-                    <!-- 名称 -->
                     <TextBlock Grid.Column="1"
                                Text="{Binding Name}"
                                FontSize="13"
@@ -167,7 +155,6 @@
                                TextTrimming="CharacterEllipsis"
                                VerticalAlignment="Center"/>
 
-                    <!-- 进度 -->
                     <TextBlock Grid.Column="2"
                                Text="{Binding ProgressText}"
                                FontSize="12"
@@ -175,7 +162,6 @@
                                Margin="8,0"
                                VerticalAlignment="Center"/>
 
-                    <!-- 类型标签 -->
                     <Border Grid.Column="3"
                             Background="{Binding TypeBackground}"
                             CornerRadius="4"
@@ -194,7 +180,6 @@
       </Border>
     </Grid>
 
-    <!-- 错误信息区域 -->
     <Border x:Name="ErrorPanel"
             Grid.Row="2"
             Background="{DynamicResource SystemFillColorCriticalBackgroundBrush}"
@@ -214,14 +199,13 @@
                    VerticalAlignment="Center"/>
         <TextBlock x:Name="ErrorText"
                    Grid.Column="1"
-                   Text="加载过程中出现错误"
+                   Text="An error occurred while loading."
                    FontSize="13"
                    Foreground="{DynamicResource SystemFillColorCriticalBrush}"
                    TextWrapping="Wrap"/>
       </Grid>
     </Border>
 
-    <!-- 底部按钮 -->
     <Border Grid.Row="3"
             Background="{DynamicResource CardBackgroundFillColorDefaultBrush}"
             Padding="16,12">
@@ -234,12 +218,12 @@
                    VerticalAlignment="Center"/>
         <StackPanel Grid.Column="1" Orientation="Horizontal" Spacing="8">
           <Button x:Name="DetailsButton"
-                  Content="查看详情"
+                  Content="Details"
                   Width="90"
                   Height="32"
                   FontSize="13"/>
           <Button x:Name="CancelButton"
-                  Content="取消"
+                  Content="Cancel"
                   Width="90"
                   Height="32"
                   FontSize="13"/>

LanMountainDesktop/Services/UpdateWorkflowService.cs

@@ -52,9 +52,7 @@ public sealed class UpdateWorkflowService
     private const string LauncherDirectoryName = ".launcher";
     private const string UpdateDirectoryName = "update";
     private const string IncomingDirectoryName = "incoming";
-    private const string DeltaManifestFileName = "files.json";
+    private const string VelopackReleasesFileName = "releases.win.json";
-    private const string DeltaSignatureFileName = "files.json.sig";
-    private const string DeltaArchiveFileName = "update.zip";
 
     public UpdateWorkflowService(ISettingsFacadeService settingsFacade)
     {
@@ -81,8 +79,7 @@ public sealed class UpdateWorkflowService
     }
 
     /// <summary>
-    /// Checks whether a GitHub Release contains delta update assets (files.json, files.json.sig, update.zip).
+    /// Checks whether a GitHub Release contains Velopack assets needed for incremental updates.
-    /// Also supports versioned filenames like files-{version}.json, delta-{old}-to-{new}.zip
     /// </summary>
     public static bool IsDeltaUpdateAvailable(GitHubReleaseInfo release)
     {
@@ -91,73 +88,13 @@ public sealed class UpdateWorkflowService
             return false;
         }
 
-        var assetNames = release.Assets.Select(a => a.Name).ToHashSet(StringComparer.OrdinalIgnoreCase);
+        var hasFeed = release.Assets.Any(a => string.Equals(a.Name, VelopackReleasesFileName, StringComparison.OrdinalIgnoreCase));
-        
+        var hasFull = release.Assets.Any(a => a.Name.EndsWith("-full.nupkg", StringComparison.OrdinalIgnoreCase));
-        // Check for exact matches first (preferred)
+        return hasFeed && hasFull;
-        var hasExactManifest = assetNames.Contains(DeltaManifestFileName);
-        var hasExactSignature = assetNames.Contains(DeltaSignatureFileName);
-        var hasExactArchive = assetNames.Contains(DeltaArchiveFileName);
-        
-        if (hasExactManifest && hasExactSignature && hasExactArchive)
-        {
-            return true;
-        }
-        
-        // Check for versioned filenames (e.g., files-1.0.0.json, delta-0.9.9-to-1.0.0.zip)
-        var hasVersionedManifest = assetNames.Any(n => n.StartsWith("files-", StringComparison.OrdinalIgnoreCase) 
-            && n.EndsWith(".json", StringComparison.OrdinalIgnoreCase));
-        var hasVersionedSignature = assetNames.Any(n => n.StartsWith("files-", StringComparison.OrdinalIgnoreCase) 
-            && n.EndsWith(".sig", StringComparison.OrdinalIgnoreCase));
-        var hasVersionedArchive = assetNames.Any(n => n.StartsWith("delta-", StringComparison.OrdinalIgnoreCase) 
-            && n.EndsWith(".zip", StringComparison.OrdinalIgnoreCase));
-        
-        return hasVersionedManifest && hasVersionedSignature && hasVersionedArchive;
     }
 
     /// <summary>
-    /// Finds the best matching delta asset name from the release assets.
+    /// Downloads Velopack release feed and package files to the Launcher's incoming directory.
-    /// Prefers exact matches, falls back to versioned filenames.
-    /// </summary>
-    private static string? FindDeltaAssetName(GitHubReleaseInfo release, string baseName)
-    {
-        if (release?.Assets is null)
-        {
-            return null;
-        }
-        
-        // Try exact match first
-        var exactMatch = release.Assets.FirstOrDefault(a => 
-            string.Equals(a.Name, baseName, StringComparison.OrdinalIgnoreCase));
-        if (exactMatch != null)
-        {
-            return exactMatch.Name;
-        }
-        
-        // Fall back to pattern matching
-        return baseName.ToLowerInvariant() switch
-        {
-            "files.json" => release.Assets
-                .Where(a => a.Name.StartsWith("files-", StringComparison.OrdinalIgnoreCase) 
-                    && a.Name.EndsWith(".json", StringComparison.OrdinalIgnoreCase))
-                .OrderByDescending(a => a.Name.Length)
-                .FirstOrDefault()?.Name,
-            "files.json.sig" => release.Assets
-                .Where(a => a.Name.StartsWith("files-", StringComparison.OrdinalIgnoreCase) 
-                    && a.Name.EndsWith(".sig", StringComparison.OrdinalIgnoreCase))
-                .OrderByDescending(a => a.Name.Length)
-                .FirstOrDefault()?.Name,
-            "update.zip" => release.Assets
-                .Where(a => a.Name.StartsWith("delta-", StringComparison.OrdinalIgnoreCase) 
-                    && a.Name.EndsWith(".zip", StringComparison.OrdinalIgnoreCase))
-                .OrderByDescending(a => a.Name.Length)
-                .FirstOrDefault()?.Name,
-            _ => null
-        };
-    }
-
-    /// <summary>
-    /// Downloads the delta update package (files.json, files.json.sig, update.zip) from a GitHub Release
-    /// and places them in the Launcher's incoming directory for the Launcher to apply on next startup.
     /// </summary>
     public async Task<UpdateDownloadResult> DownloadDeltaUpdateAsync(
         UpdateCheckResult checkResult,
@@ -171,9 +108,11 @@ public sealed class UpdateWorkflowService
             return new UpdateDownloadResult(false, null, "No update available for delta download.");
         }
 
-        if (!IsDeltaUpdateAvailable(checkResult.Release))
+        var releasesFeedAsset = checkResult.Release.Assets.FirstOrDefault(a =>
+            string.Equals(a.Name, VelopackReleasesFileName, StringComparison.OrdinalIgnoreCase));
+        if (releasesFeedAsset is null)
         {
-            return new UpdateDownloadResult(false, null, "Release does not contain delta update assets.");
+            return new UpdateDownloadResult(false, null, "Release does not contain releases.win.json.");
         }
 
         var incomingDir = GetLauncherIncomingDirectory();
@@ -191,55 +130,29 @@ public sealed class UpdateWorkflowService
         var downloadSource = state.UpdateDownloadSource;
         var downloadThreads = state.UpdateDownloadThreads;
 
-        // Find the actual asset names (support both exact and versioned filenames)
+        var latestVersionText = checkResult.LatestVersionText.Trim();
-        var manifestAssetName = FindDeltaAssetName(checkResult.Release, DeltaManifestFileName);
+        var targetPackages = checkResult.Release.Assets
-        var signatureAssetName = FindDeltaAssetName(checkResult.Release, DeltaSignatureFileName);
+            .Where(a => a.Name.EndsWith(".nupkg", StringComparison.OrdinalIgnoreCase))
-        var archiveAssetName = FindDeltaAssetName(checkResult.Release, DeltaArchiveFileName);
+            .Where(a => a.Name.Contains(latestVersionText, StringComparison.OrdinalIgnoreCase))
+            .Where(a =>
+                a.Name.EndsWith("-full.nupkg", StringComparison.OrdinalIgnoreCase) ||
+                a.Name.EndsWith("-delta.nupkg", StringComparison.OrdinalIgnoreCase))
+            .ToList();
 
-        if (manifestAssetName is null || signatureAssetName is null || archiveAssetName is null)
+        if (targetPackages.Count == 0)
         {
-            return new UpdateDownloadResult(false, null, "One or more delta assets not found in release.");
+            return new UpdateDownloadResult(false, null, "No Velopack nupkg asset found for the target version.");
         }
 
-        // Build asset map with actual names from release
+        var requiredAssets = new List<GitHubReleaseAsset> { releasesFeedAsset };
-        var assetMap = new Dictionary<string, string>(StringComparer.OrdinalIgnoreCase)
+        requiredAssets.AddRange(targetPackages);
-        {
-            [DeltaManifestFileName] = manifestAssetName,
-            [DeltaSignatureFileName] = signatureAssetName,
-            [DeltaArchiveFileName] = archiveAssetName
-        };
-        
-        var requiredAssets = new Dictionary<string, GitHubReleaseAsset>(StringComparer.OrdinalIgnoreCase)
-        {
-            [DeltaManifestFileName] = null!,
-            [DeltaSignatureFileName] = null!,
-            [DeltaArchiveFileName] = null!
-        };
-
-        foreach (var asset in checkResult.Release.Assets)
-        {
-            // Match by actual asset name
-            foreach (var (key, actualName) in assetMap)
-            {
-                if (string.Equals(asset.Name, actualName, StringComparison.OrdinalIgnoreCase))
-                {
-                    requiredAssets[key] = asset;
-                    break;
-                }
-            }
-        }
-
-        if (requiredAssets.Any(kvp => kvp.Value is null))
-        {
-            return new UpdateDownloadResult(false, null, "One or more delta assets not found in release.");
-        }
 
         var totalAssets = requiredAssets.Count;
         var completedAssets = 0;
 
-        foreach (var (name, asset) in requiredAssets)
+        foreach (var asset in requiredAssets)
         {
-            var destinationPath = Path.Combine(incomingDir, name);
+            var destinationPath = Path.Combine(incomingDir, asset.Name);
 
             // Skip if already downloaded and file exists
             if (File.Exists(destinationPath))
@@ -247,7 +160,7 @@ public sealed class UpdateWorkflowService
                 var existingHash = await GitHubReleaseUpdateService.ComputeFileSha256Async(destinationPath, cancellationToken);
                 if (asset.Sha256 is not null && string.Equals(existingHash, asset.Sha256, StringComparison.OrdinalIgnoreCase))
                 {
-                    AppLogger.Info("UpdateWorkflow", $"Delta asset {name} already downloaded with matching hash, skipping.");
+                    AppLogger.Info("UpdateWorkflow", $"Velopack asset {asset.Name} already downloaded with matching hash, skipping.");
                     completedAssets++;
                     progress?.Report((double)completedAssets / totalAssets);
                     continue;
@@ -271,21 +184,21 @@ public sealed class UpdateWorkflowService
             if (!result.Success)
             {
                 // Clean up partially downloaded files
-                foreach (var file in requiredAssets.Keys)
+                foreach (var file in requiredAssets.Select(a => a.Name))
                 {
                     try { File.Delete(Path.Combine(incomingDir, file)); } catch { }
                 }
-                return new UpdateDownloadResult(false, null, $"Failed to download delta asset {name}: {result.ErrorMessage}");
+                return new UpdateDownloadResult(false, null, $"Failed to download Velopack asset {asset.Name}: {result.ErrorMessage}");
             }
 
             completedAssets++;
             progress?.Report((double)completedAssets / totalAssets);
         }
 
-        // Save state indicating a delta update is pending
+        // Save state indicating a Velopack update is pending.
         SaveState(state with
         {
-            PendingUpdateInstallerPath = Path.Combine(incomingDir, DeltaManifestFileName),
+            PendingUpdateInstallerPath = Path.Combine(incomingDir, VelopackReleasesFileName),
             PendingUpdateVersion = checkResult.LatestVersionText,
             PendingUpdatePublishedAtUtcMs = checkResult.Release.PublishedAt == DateTimeOffset.MinValue
                 ? null
@@ -294,13 +207,13 @@ public sealed class UpdateWorkflowService
             PendingUpdateSha256 = null
         });
 
-        AppLogger.Info("UpdateWorkflow", $"Delta update package downloaded to {incomingDir}. Will be applied by Launcher on next startup.");
+        AppLogger.Info("UpdateWorkflow", $"Velopack update payload downloaded to {incomingDir}. Will be applied by Launcher on next startup.");
 
-        return new UpdateDownloadResult(true, Path.Combine(incomingDir, DeltaManifestFileName), null);
+        return new UpdateDownloadResult(true, Path.Combine(incomingDir, VelopackReleasesFileName), null);
     }
 
     /// <summary>
-    /// Checks whether the pending update is a delta update (files.json in incoming dir) vs a full installer.
+    /// Checks whether the pending update is managed by Launcher incoming payload.
     /// </summary>
     public bool IsPendingDeltaUpdate()
     {
@@ -311,8 +224,8 @@ public sealed class UpdateWorkflowService
             return false;
         }
 
-        // Delta updates are identified by the manifest file path
+        // Velopack updates are identified by the releases feed path.
-        return pendingPath.EndsWith(DeltaManifestFileName, StringComparison.OrdinalIgnoreCase)
+        return pendingPath.EndsWith(VelopackReleasesFileName, StringComparison.OrdinalIgnoreCase)
             || pendingPath.Contains(IncomingDirectoryName, StringComparison.OrdinalIgnoreCase);
     }
 

docs/ARCHITECTURE.md

@@ -194,3 +194,9 @@ This repository is organized around a desktop host app plus a host-side plugin e
 **Launcher Architecture**: `LanMountainDesktop.Launcher/` serves as the single entry point, managing OOBE, splash screen, multi-version deployment, incremental updates, and plugin installation. It uses a version directory structure (`app-{version}/`) with marker files (`.current`, `.partial`, `.destroy`) to enable atomic updates and rollback capabilities. See the Chinese section above for detailed architecture documentation.
 
 The runtime flow starts with the Launcher selecting the best version, then proceeds into `Program.cs`, into `App.axaml.cs`, initializes settings/theme/localization services, then boots the desktop shell, tray, windows, and plugin runtime. The most important behavior boundaries are component registration, plugin activation, appearance resources, and settings persistence.
+
+## VeloPack Integration Note
+
+- Incremental package build/publish has moved to VeloPack native assets (
+eleases.win.json + *.nupkg).
+- Launcher runtime responsibilities are unchanged: OOBE, startup orchestration, update apply, and rollback.

docs/DEVELOPMENT.md

@@ -166,3 +166,10 @@ Use `LanMountainDesktop.slnx` as the workspace entry point. The standard loop is
 For packaging, see `LanMountainDesktop/PACKAGING.md`. For plugin package generation or local feed workflows, use `scripts/Pack-PluginPackages.ps1`.
 
 **Launcher Architecture**: LanMountainDesktop uses a Launcher as the single entry point, responsible for version management, updates, and launching the main application. See the Chinese section above for detailed architecture documentation.
+
+## VeloPack Release Assets
+
+- Windows incremental release packaging now uses VeloPack native outputs (
+eleases.win.json, *.nupkg).
+- Launcher still performs update apply/rollback; VeloPack is used for package generation.
+- Legacy delta script flow is retained behind a disabled fallback switch in CI.

docs/UPDATE_SYSTEM.md

@@ -442,3 +442,10 @@ private static void EnsurePathWithinRoot(string targetPath, string rootPath)
 - [Launcher 架构文档](LAUNCHER.md)
 - [构建和部署指南](BUILD_AND_DEPLOY.md)
 - [故障排除指南](TROUBLESHOOTING.md)
+
+## VeloPack Packaging (Current)
+
+- Release pipeline now produces VeloPack native assets (
+eleases.win.json, *.nupkg, RELEASES).
+- Launcher remains the installer and rollback authority; only package generation moved to VeloPack.
+- Legacy iles.json + update.zip generation remains available only as a disabled fallback path in CI.