Add a Release notes item to the updates context menu

src/UniGetUI.Avalonia/Views/SoftwarePages/SoftwareUpdatesPage.cs

@@ -28,6 +28,8 @@ public class SoftwareUpdatesPage : AbstractPackagesPage
     private MenuItem? _menuSkipHash;
     private MenuItem? _menuDownloadInstaller;
     private MenuItem? _menuOpenInstallLocation;
+    private MenuItem? _menuReleaseNotes;
+    private IPackage? _releaseNotesPackage;
 
     public SoftwareUpdatesPage() : base(new PackagesPageData
     {
@@ -249,6 +251,13 @@ protected override void GenerateToolBar(PackagesPageViewModel vm)
         };
         menuDetails.Click += (_, _) => _ = ShowDetailsForPackage(SelectedItem);
 
+        _menuReleaseNotes = new MenuItem
+        {
+            Header = CoreTools.Translate("Release notes"),
+            Icon = LoadMenuIcon("megaphone"),
+        };
+        _menuReleaseNotes.Click += (_, _) => _ = ShowReleaseNotesForPackage(SelectedItem);
+
         var menu = new ContextMenu();
         menu.Items.Add(menuUpdate);
         menu.Items.Add(new Separator());
@@ -268,6 +277,7 @@ protected override void GenerateToolBar(PackagesPageViewModel vm)
         menu.Items.Add(menuSkipVersion);
         menu.Items.Add(menuPause);
         menu.Items.Add(new Separator());
+        menu.Items.Add(_menuReleaseNotes);
         menu.Items.Add(menuDetails);
 
         return menu;
@@ -276,7 +286,8 @@ protected override void GenerateToolBar(PackagesPageViewModel vm)
     protected override void WhenShowingContextMenu(IPackage package)
     {
         if (_menuAsAdmin is null || _menuInteractive is null || _menuSkipHash is null
-            || _menuDownloadInstaller is null || _menuOpenInstallLocation is null)
+            || _menuDownloadInstaller is null || _menuOpenInstallLocation is null
+            || _menuReleaseNotes is null)
         {
             Logger.Warn("Context menu items are null on SoftwareUpdatesPage");
             return;
@@ -289,8 +300,35 @@ protected override void WhenShowingContextMenu(IPackage package)
         _menuDownloadInstaller.IsEnabled = caps.CanDownloadInstaller;
         _menuOpenInstallLocation.IsEnabled =
             package.Manager.DetailsHelper.GetInstallLocation(package) is not null;
+
+        _releaseNotesPackage = package;
+        if (!caps.SupportsReleaseNotes)
+            _menuReleaseNotes.IsEnabled = false;
+        else if (package.Details.IsPopulated)
+            _menuReleaseNotes.IsEnabled = HasReleaseNotes(package.Details);
+        else
+        {
+            _menuReleaseNotes.IsEnabled = false;
+            _ = UpdateReleaseNotesAvailabilityAsync(package);
+        }
+    }
+
+    private async Task UpdateReleaseNotesAvailabilityAsync(IPackage package)
+    {
+        await package.Details.Load();
+        if (_menuReleaseNotes is not null && ReferenceEquals(_releaseNotesPackage, package))
+            _menuReleaseNotes.IsEnabled = HasReleaseNotes(package.Details);
     }
 
+    private static bool HasReleaseNotes(IPackageDetails details) =>
+        GetReleaseNotesUrl(details) is not null || !string.IsNullOrWhiteSpace(details.ReleaseNotes);
+
+    private static Uri? GetReleaseNotesUrl(IPackageDetails details) =>
+        details.ReleaseNotesUrl is { IsAbsoluteUri: true } url
+        && (url.Scheme == Uri.UriSchemeHttps || url.Scheme == Uri.UriSchemeHttp)
+            ? url
+            : null;
+
     // ─── Abstract action overrides ────────────────────────────────────────────
     protected override void PerformMainPackageAction(IPackage? package)
     {
@@ -335,6 +373,19 @@ private static void OpenInstallLocation(IPackage? package)
             Process.Start(new ProcessStartInfo(path) { UseShellExecute = true });
     }
 
+    private async Task ShowReleaseNotesForPackage(IPackage? package)
+    {
+        if (package is null) return;
+
+        if (!package.Details.IsPopulated)
+            await package.Details.Load();
+
+        if (GetReleaseNotesUrl(package.Details) is { } url)
+            CoreTools.Launch(url.AbsoluteUri);
+        else if (!string.IsNullOrWhiteSpace(package.Details.ReleaseNotes))
+            await ShowDetailsForPackage(package);
+    }
+
     // ─── Operation launchers ──────────────────────────────────────────────────
     private static async Task LaunchUpdate(
         IEnumerable<IPackage> packages,

src/UniGetUI.PackageEngine.Enums/ManagerCapabilities.cs

@@ -33,6 +33,7 @@ public struct ManagerCapabilities
         public bool CanDownloadInstaller = false;
         public bool CanUninstallPreviousVersionsAfterUpdate = false;
         public bool CanListDependencies = false;
+        public bool SupportsReleaseNotes = false;
         public bool SupportsCustomVersions = false;
         public bool SupportsCustomArchitectures = false;
         public string[] SupportedCustomArchitectures = [];

src/UniGetUI.PackageEngine.Managers.Chocolatey/Chocolatey.cs

@@ -94,6 +94,7 @@ public Chocolatey()
             {
                 CanRunAsAdmin = true,
                 CanDownloadInstaller = true,
+                SupportsReleaseNotes = true,
                 CanSkipIntegrityChecks = true,
                 CanRunInteractively = true,
                 SupportsCustomVersions = true,

src/UniGetUI.PackageEngine.Managers.Dotnet/DotNet.cs

@@ -27,6 +27,7 @@ public DotNet()
             {
                 CanRunAsAdmin = true,
                 CanDownloadInstaller = true,
+                SupportsReleaseNotes = true,
                 SupportsCustomScopes = true,
                 SupportsCustomArchitectures = true,
                 SupportedCustomArchitectures =

src/UniGetUI.PackageEngine.Managers.PowerShell/PowerShell.cs

@@ -26,6 +26,7 @@ public PowerShell()
                 CanSkipIntegrityChecks = true,
                 SupportsCustomVersions = true,
                 CanDownloadInstaller = true,
+                SupportsReleaseNotes = true,
                 SupportsCustomScopes = true,
                 // Update-Module/Uninstall-Module (PowerShellGet) take no -Scope; only Install-Module does
                 SupportsCustomScopesOnUpdate = false,

src/UniGetUI.PackageEngine.Managers.PowerShell7/PowerShell7.cs

@@ -32,6 +32,7 @@ public PowerShell7()
                 SupportsCustomSources = true,
                 SupportsPreRelease = true,
                 CanDownloadInstaller = true,
+                SupportsReleaseNotes = true,
                 CanListDependencies = true,
                 SupportsCustomPackageIcons = true,
                 CanUninstallPreviousVersionsAfterUpdate = true,

src/UniGetUI.PackageEngine.Managers.WinGet/WinGet.cs

@@ -114,6 +114,7 @@ public WinGet()
                 CanRunInteractively = true,
                 SupportsCustomVersions = true,
                 CanDownloadInstaller = true,
+                SupportsReleaseNotes = true,
                 CanListDependencies = true,
                 SupportsCustomArchitectures = true,
                 SupportedCustomArchitectures =