UI rework: per-row actions, drop sidebar

Replace the sidebar + hero + single big-button layout with a flat list of
per-version cards. Each card carries its own action button:
- Installed: ▶ Lancer (green, primary)
- Available on server only: ⬇ Installer (blue, accent) + lighter blue card
- Busy: inline mini progress bar with %, card tinted green

Each card also exposes a "..." menu (left-click opens it) with:
- Voir les release notes (works for installed and remote-only versions)
- Ouvrir le dossier (installed only)
- Supprimer cette version (installed only, with confirmation dialog)

VersionRowViewModel owns its state (InstalledIdle / AvailableIdle /
Downloading / Installing / Uninstalling) and its commands; MainViewModel
wires per-row handlers after instantiation so the row VM stays UI-only
and the services live one layer up.

ReleaseNotesViewerDialog: separate dialog reused by the menu — same
Markdown rendering as UpdateAvailableDialog but no download CTA.

Theme: AccentButton + IconButton + dark ContextMenu/MenuItem styles.

Behavior changes:
- The single global SelectedVersion + AvailableUpdate are gone; each row
  is independently actionable.
- The list now merges installed + remote: a version present on the
  server but not locally appears as a "remote-only" row, and vice-versa.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

src/PSLauncher.App/Resources/Theme.xaml

@@ -94,6 +94,77 @@
         <Setter Property="Padding" Value="14,8" />
     </Style>
 
+    <Style x:Key="AccentButton" TargetType="Button" BasedOn="{StaticResource PrimaryButton}">
+        <Setter Property="Background" Value="{StaticResource Brush.Accent}" />
+        <Setter Property="Template">
+            <Setter.Value>
+                <ControlTemplate TargetType="Button">
+                    <Border x:Name="Bd"
+                            Background="{TemplateBinding Background}"
+                            CornerRadius="4"
+                            Padding="{TemplateBinding Padding}">
+                        <ContentPresenter HorizontalAlignment="Center" VerticalAlignment="Center" />
+                    </Border>
+                    <ControlTemplate.Triggers>
+                        <Trigger Property="IsMouseOver" Value="True">
+                            <Setter TargetName="Bd" Property="Background" Value="{StaticResource Brush.AccentHover}" />
+                        </Trigger>
+                        <Trigger Property="IsEnabled" Value="False">
+                            <Setter TargetName="Bd" Property="Background" Value="#444" />
+                            <Setter Property="Foreground" Value="#888" />
+                        </Trigger>
+                    </ControlTemplate.Triggers>
+                </ControlTemplate>
+            </Setter.Value>
+        </Setter>
+    </Style>
+
+    <Style x:Key="IconButton" TargetType="Button">
+        <Setter Property="Background" Value="Transparent" />
+        <Setter Property="Foreground" Value="{StaticResource Brush.Text.Secondary}" />
+        <Setter Property="Cursor" Value="Hand" />
+        <Setter Property="Padding" Value="8,4" />
+        <Setter Property="BorderThickness" Value="0" />
+        <Setter Property="Template">
+            <Setter.Value>
+                <ControlTemplate TargetType="Button">
+                    <Border x:Name="Bd"
+                            Background="{TemplateBinding Background}"
+                            CornerRadius="4"
+                            Padding="{TemplateBinding Padding}">
+                        <ContentPresenter HorizontalAlignment="Center" VerticalAlignment="Center" />
+                    </Border>
+                    <ControlTemplate.Triggers>
+                        <Trigger Property="IsMouseOver" Value="True">
+                            <Setter TargetName="Bd" Property="Background" Value="#2C2C32" />
+                            <Setter Property="Foreground" Value="{StaticResource Brush.Text.Primary}" />
+                        </Trigger>
+                    </ControlTemplate.Triggers>
+                </ControlTemplate>
+            </Setter.Value>
+        </Setter>
+    </Style>
+
+    <!-- Style ContextMenu sombre, cohérent avec le thème -->
+    <Style TargetType="ContextMenu">
+        <Setter Property="Background" Value="{StaticResource Brush.Bg.Card}" />
+        <Setter Property="BorderBrush" Value="{StaticResource Brush.Border}" />
+        <Setter Property="BorderThickness" Value="1" />
+        <Setter Property="Foreground" Value="{StaticResource Brush.Text.Primary}" />
+        <Setter Property="Padding" Value="4" />
+    </Style>
+
+    <Style TargetType="MenuItem">
+        <Setter Property="Background" Value="Transparent" />
+        <Setter Property="Foreground" Value="{StaticResource Brush.Text.Primary}" />
+        <Setter Property="Padding" Value="10,6" />
+    </Style>
+
+    <Style TargetType="Separator">
+        <Setter Property="Background" Value="{StaticResource Brush.Border}" />
+        <Setter Property="Margin" Value="4,4" />
+    </Style>
+
     <Style x:Key="VersionPill" TargetType="Border">
         <Setter Property="Background" Value="#2C2C32" />
         <Setter Property="CornerRadius" Value="12" />

src/PSLauncher.App/ViewModels/MainViewModel.cs

@@ -28,23 +28,11 @@ public sealed partial class MainViewModel : ObservableObject
     private readonly IZipInstaller _zipInstaller;
     private readonly ILogger<MainViewModel> _logger;
 
-    private CancellationTokenSource? _downloadCts;
+    private RemoteManifest? _lastManifest;
+    private CancellationTokenSource? _activeDownloadCts;
+    private VersionRowViewModel? _activeRow;
 
-    public ObservableCollection<InstalledVersionViewModel> InstalledVersions { get; } = new();
+    public ObservableCollection<VersionRowViewModel> Versions { get; } = new();
-
-    [ObservableProperty]
-    [NotifyPropertyChangedFor(nameof(StatusBadge))]
-    [NotifyPropertyChangedFor(nameof(PrimaryActionLabel))]
-    [NotifyPropertyChangedFor(nameof(PrimaryActionEnabled))]
-    [NotifyPropertyChangedFor(nameof(HeroTitle))]
-    [NotifyCanExecuteChangedFor(nameof(PrimaryActionCommand))]
-    private InstalledVersionViewModel? _selectedVersion;
-
-    [ObservableProperty]
-    [NotifyPropertyChangedFor(nameof(StatusBadge))]
-    [NotifyPropertyChangedFor(nameof(PrimaryActionLabel))]
-    [NotifyPropertyChangedFor(nameof(PrimaryActionEnabled))]
-    private VersionManifest? _availableUpdate;
 
     [ObservableProperty]
     [NotifyPropertyChangedFor(nameof(FooterText))]
@@ -54,76 +42,29 @@ public sealed partial class MainViewModel : ObservableObject
     [ObservableProperty]
     [NotifyPropertyChangedFor(nameof(FooterText))]
     [NotifyPropertyChangedFor(nameof(FooterVisibility))]
-    [NotifyPropertyChangedFor(nameof(StatusBadge))]
-    [NotifyPropertyChangedFor(nameof(PrimaryActionLabel))]
-    [NotifyPropertyChangedFor(nameof(PrimaryActionEnabled))]
-    [NotifyCanExecuteChangedFor(nameof(PrimaryActionCommand))]
     [NotifyCanExecuteChangedFor(nameof(CheckForUpdatesCommand))]
     private bool _isBusy;
 
-    [ObservableProperty]
+    [ObservableProperty] private double _progressPercent;
-    [NotifyPropertyChangedFor(nameof(FooterText))]
+    [ObservableProperty] private string? _progressDetail;
-    [NotifyPropertyChangedFor(nameof(FooterVisibility))]
-    private double _progressPercent;
-
-    [ObservableProperty]
-    [NotifyPropertyChangedFor(nameof(FooterText))]
-    private string? _progressDetail;
-
-    public string StatusBadge
-    {
-        get
-        {
-            if (IsBusy) return "● En cours";
-            if (AvailableUpdate is not null) return "🔔 MAJ disponible";
-            if (SelectedVersion is null) return "Aucune version";
-            return "● Installée";
-        }
-    }
-
-    public string PrimaryActionLabel
-    {
-        get
-        {
-            if (IsBusy) return "Veuillez patienter…";
-            if (AvailableUpdate is not null && SelectedVersion is null)
-                return $"⬇  INSTALLER v{AvailableUpdate.Version}";
-            if (AvailableUpdate is not null)
-                return $"⬇  TÉLÉCHARGER v{AvailableUpdate.Version}";
-            return SelectedVersion is null ? "Aucune version disponible" : "▶  LANCER";
-        }
-    }
-
-    public bool PrimaryActionEnabled => !IsBusy && (SelectedVersion is not null || AvailableUpdate is not null);
-
-    public string HeroTitle
-    {
-        get
-        {
-            if (AvailableUpdate is not null) return $"PROSERVE — v{AvailableUpdate.Version}";
-            return SelectedVersion is null ? "PROSERVE" : $"PROSERVE — {SelectedVersion.Display}";
-        }
-    }
 
     public string LicenseSummary => "License : non configurée (v0.4)";
 
     public string EmptyHint =>
-        $"Aucune version trouvée dans :\n{_config.InstallRoot}\n\n" +
+        "Aucune version locale ni distante.\n" +
-        "Configure l'URL serveur dans config.json puis clique « Vérifier les mises à jour », " +
+        "Clique « Vérifier les mises à jour » pour récupérer le catalogue depuis le serveur, " +
-        "ou place un dossier « Proserve v{X.Y.Z} » contenant PROSERVE_UE_5_5.exe à cet emplacement.";
+        "ou place un dossier « Proserve v{X.Y.Z} » contenant PROSERVE_UE_5_5.exe dans :\n" +
+        _config.InstallRoot;
 
-    public Visibility EmptyHintVisibility => InstalledVersions.Count == 0 ? Visibility.Visible : Visibility.Collapsed;
+    public Visibility EmptyHintVisibility =>
+        Versions.Count == 0 ? Visibility.Visible : Visibility.Collapsed;
 
-    public Visibility FooterVisibility => IsBusy || !string.IsNullOrEmpty(StatusMessage) ? Visibility.Visible : Visibility.Collapsed;
+    public Visibility FooterVisibility =>
+        IsBusy || !string.IsNullOrEmpty(StatusMessage) ? Visibility.Visible : Visibility.Collapsed;
 
-    public string FooterText
+    public string FooterText =>
-    {
+        !string.IsNullOrEmpty(ProgressDetail) ? ProgressDetail :
-        get
+        StatusMessage ?? string.Empty;
-        {
-            if (!string.IsNullOrEmpty(ProgressDetail)) return ProgressDetail;
-            return StatusMessage ?? string.Empty;
-        }
-    }
 
     public MainViewModel(
         IInstallationRegistry registry,
@@ -145,25 +86,49 @@ public sealed partial class MainViewModel : ObservableObject
         _downloadManager = downloadManager;
         _zipInstaller = zipInstaller;
         _logger = logger;
-        Refresh();
+        RebuildList();
     }
 
-    [RelayCommand]
+    /// <summary>Recompose la liste affichée à partir du scan local + du dernier manifest distant.</summary>
-    private void Refresh()
+    private void RebuildList()
     {
-        InstalledVersions.Clear();
+        var installed = _registry.Scan().ToDictionary(v => v.Version);
-        foreach (var v in _registry.Scan())
+        var remote = _lastManifest?.Versions ?? new List<VersionManifest>();
-            InstalledVersions.Add(new InstalledVersionViewModel(v));
+        var remoteByVer = remote.ToDictionary(v => v.Version);
 
-        SelectedVersion = !string.IsNullOrEmpty(_config.LastLaunchedVersion)
+        var allVersions = installed.Keys.Union(remoteByVer.Keys)
-            ? InstalledVersions.FirstOrDefault(v => v.Model.Version == _config.LastLaunchedVersion)
+            .OrderByDescending(v => SemVer.Parse(v))
-              ?? InstalledVersions.FirstOrDefault()
+            .ToList();
-            : InstalledVersions.FirstOrDefault();
+
+        Versions.Clear();
+        foreach (var ver in allVersions)
+        {
+            VersionRowViewModel row;
+            if (installed.TryGetValue(ver, out var inst))
+            {
+                row = VersionRowViewModel.ForInstalled(inst, remoteByVer.GetValueOrDefault(ver));
+            }
+            else
+            {
+                row = VersionRowViewModel.ForRemote(remoteByVer[ver]);
+            }
+            WireRowHandlers(row);
+            Versions.Add(row);
+        }
 
         OnPropertyChanged(nameof(EmptyHint));
         OnPropertyChanged(nameof(EmptyHintVisibility));
     }
 
+    private void WireRowHandlers(VersionRowViewModel row)
+    {
+        row.LaunchHandler = LaunchVersion;
+        row.InstallHandler = r => _ = InstallVersionAsync(r);
+        row.UninstallHandler = r => _ = UninstallVersionAsync(r);
+        row.ShowReleaseNotesHandler = r => _ = ShowReleaseNotesAsync(r);
+        row.OpenFolderHandler = OpenVersionFolder;
+    }
+
     [RelayCommand(CanExecute = nameof(CanCheckUpdates))]
     private async Task CheckForUpdatesAsync()
     {
@@ -175,22 +140,18 @@ public sealed partial class MainViewModel : ObservableObject
             if (result.Error is not null)
             {
                 StatusMessage = $"Erreur : {result.Error}";
-                AvailableUpdate = null;
                 return;
             }
 
+            _lastManifest = result.Manifest;
+            RebuildList();
+
             if (result.IsLatestNewerThanInstalled && result.LatestRemote is not null)
-            {
-                AvailableUpdate = result.LatestRemote;
                 StatusMessage = $"Nouvelle version disponible : v{result.LatestRemote.Version}";
-            }
+            else if (result.LatestRemote is not null)
+                StatusMessage = $"À jour (v{result.LatestRemote.Version})";
             else
-            {
+                StatusMessage = "Aucune version distante trouvée";
-                AvailableUpdate = null;
-                StatusMessage = result.LatestRemote is not null
-                    ? $"À jour (v{result.LatestRemote.Version})"
-                    : "Aucune version distante trouvée";
-            }
         }
         catch (Exception ex)
         {
@@ -202,142 +163,217 @@ public sealed partial class MainViewModel : ObservableObject
             IsBusy = false;
         }
     }
-
     private bool CanCheckUpdates() => !IsBusy;
 
-    [RelayCommand(CanExecute = nameof(PrimaryActionEnabled))]
-    private async Task PrimaryActionAsync()
-    {
-        if (AvailableUpdate is not null)
-        {
-            await DownloadAndInstallAsync(AvailableUpdate);
-            return;
-        }
-
-        if (SelectedVersion is null) return;
-        try
-        {
-            _processLauncher.Launch(SelectedVersion.Model);
-            _config.LastLaunchedVersion = SelectedVersion.Model.Version;
-            _configStore.Save(_config);
-        }
-        catch (Exception ex)
-        {
-            _logger.LogError(ex, "Failed to launch");
-            MessageBox.Show(
-                $"Impossible de lancer la version :\n\n{ex.Message}",
-                "Erreur de lancement",
-                MessageBoxButton.OK, MessageBoxImage.Error);
-        }
-    }
-
-    private async Task DownloadAndInstallAsync(VersionManifest version)
-    {
-        // 1) Récupère release notes et propose dialog
-        string notes;
-        try
-        {
-            notes = !string.IsNullOrEmpty(version.ReleaseNotesUrl)
-                ? await _manifestService.FetchReleaseNotesAsync(version.ReleaseNotesUrl, CancellationToken.None)
-                : "_Aucune release note fournie._";
-        }
-        catch (Exception ex)
-        {
-            _logger.LogWarning(ex, "Failed to fetch release notes");
-            notes = "_Release notes indisponibles._";
-        }
-
-        var dialog = new UpdateAvailableDialog(version, notes)
-        {
-            Owner = Application.Current.MainWindow
-        };
-        dialog.ShowDialog();
-        if (!dialog.DownloadRequested) return;
-
-        IsBusy = true;
-        _downloadCts = new CancellationTokenSource();
-        try
-        {
-            var url = new Uri(version.Download.Url);
-            var job = new DownloadJob(version.Version, url, version.Download.SizeBytes, version.Download.Sha256);
-
-            var progress = new Progress<DownloadProgress>(p => UpdateDlProgress(version.Version, p));
-            StatusMessage = $"Téléchargement v{version.Version}…";
-            var zipPath = await _downloadManager.DownloadAsync(job, progress, _downloadCts.Token);
-
-            // 2) Extraction
-            StatusMessage = $"Installation v{version.Version}…";
-            var folderName = version.GetInstallFolderName();
-            var target = Path.Combine(_config.InstallRoot, folderName);
-            var installProgress = new Progress<InstallProgress>(ip =>
-            {
-                if (ip.BytesTotal <= 0) return;
-                ProgressPercent = (double)ip.BytesDone / ip.BytesTotal * 100.0;
-                ProgressDetail = $"Extraction : {ip.EntriesDone}/{ip.EntriesTotal} fichiers ({FormatSize(ip.BytesDone)} / {FormatSize(ip.BytesTotal)})";
-            });
-            await _zipInstaller.InstallAsync(zipPath, target, installProgress, _downloadCts.Token);
-
-            // 3) Nettoyage du ZIP téléchargé (le user peut le rétablir depuis le serveur s'il en a besoin)
-            try { File.Delete(zipPath); } catch { /* non critique */ }
-
-            StatusMessage = $"v{version.Version} installée avec succès";
-            ProgressDetail = null;
-            ProgressPercent = 0;
-            AvailableUpdate = null;
-            Refresh();
-        }
-        catch (OperationCanceledException)
-        {
-            StatusMessage = "Téléchargement annulé";
-        }
-        catch (Exception ex)
-        {
-            _logger.LogError(ex, "Download/install failed");
-            MessageBox.Show(
-                $"Le téléchargement ou l'installation a échoué :\n\n{ex.Message}",
-                "Erreur",
-                MessageBoxButton.OK, MessageBoxImage.Error);
-            StatusMessage = $"Erreur : {ex.Message}";
-        }
-        finally
-        {
-            _downloadCts?.Dispose();
-            _downloadCts = null;
-            IsBusy = false;
-        }
-    }
-
-    private void UpdateDlProgress(string version, DownloadProgress p)
-    {
-        if (p.TotalBytes > 0)
-            ProgressPercent = (double)p.BytesDownloaded / p.TotalBytes * 100.0;
-
-        var sb = new System.Text.StringBuilder();
-        sb.Append("⬇ v").Append(version).Append(" : ");
-        sb.Append(FormatSize(p.BytesDownloaded));
-        if (p.TotalBytes > 0) sb.Append(" / ").Append(FormatSize(p.TotalBytes));
-        if (p.BytesPerSecond > 0) sb.Append(" • ").Append(FormatSize((long)p.BytesPerSecond)).Append("/s");
-        if (p.Eta is { } eta && eta.TotalSeconds > 1) sb.Append(" • ETA ").Append(FormatEta(eta));
-        ProgressDetail = sb.ToString();
-    }
-
     [RelayCommand]
-    private void OpenFolder()
+    private void OpenInstallRoot()
     {
-        var path = SelectedVersion?.Model.FolderPath ?? _config.InstallRoot;
+        if (!Directory.Exists(_config.InstallRoot)) return;
-        if (string.IsNullOrEmpty(path) || !Directory.Exists(path)) return;
         Process.Start(new ProcessStartInfo
         {
-            FileName = path,
+            FileName = _config.InstallRoot,
             UseShellExecute = true,
             Verb = "open"
         });
     }
 
     [RelayCommand]
-    private void CancelDownload()
+    private void CancelDownload() => _activeDownloadCts?.Cancel();
+
+    // ------------ Per-row actions ------------
+
+    private void LaunchVersion(VersionRowViewModel row)
     {
-        _downloadCts?.Cancel();
+        if (row.Installed is null) return;
+        try
+        {
+            _processLauncher.Launch(row.Installed);
+            _config.LastLaunchedVersion = row.Version;
+            _configStore.Save(_config);
+        }
+        catch (Exception ex)
+        {
+            _logger.LogError(ex, "Launch failed");
+            MessageBox.Show($"Impossible de lancer la version :\n\n{ex.Message}",
+                "Erreur de lancement", MessageBoxButton.OK, MessageBoxImage.Error);
+        }
+    }
+
+    private async Task InstallVersionAsync(VersionRowViewModel row)
+    {
+        if (row.Remote is null) return;
+        if (IsBusy) { MessageBox.Show("Une autre opération est déjà en cours.", "Patience", MessageBoxButton.OK, MessageBoxImage.Information); return; }
+
+        IsBusy = true;
+        _activeRow = row;
+        _activeDownloadCts = new CancellationTokenSource();
+        var ct = _activeDownloadCts.Token;
+
+        try
+        {
+            // 1) Récupère release notes (best effort)
+            string notes = "_Aucune release note fournie._";
+            if (!string.IsNullOrEmpty(row.Remote.ReleaseNotesUrl))
+            {
+                try
+                {
+                    notes = await _manifestService.FetchReleaseNotesAsync(row.Remote.ReleaseNotesUrl, ct);
+                }
+                catch (Exception ex) { _logger.LogWarning(ex, "Release notes fetch failed"); notes = "_Release notes indisponibles._"; }
+            }
+
+            // 2) Dialog de confirmation avec release notes
+            var dialog = new UpdateAvailableDialog(row.Remote, notes) { Owner = Application.Current.MainWindow };
+            dialog.ShowDialog();
+            if (!dialog.DownloadRequested) return;
+
+            // 3) Download
+            row.State = VersionRowState.Downloading;
+            var url = new Uri(row.Remote.Download.Url);
+            var job = new DownloadJob(row.Version, url, row.Remote.Download.SizeBytes, row.Remote.Download.Sha256);
+            var dlProgress = new Progress<DownloadProgress>(p => UpdateDlProgress(row, p));
+            StatusMessage = $"Téléchargement v{row.Version}…";
+            var zipPath = await _downloadManager.DownloadAsync(job, dlProgress, ct);
+
+            // 4) Install
+            row.State = VersionRowState.Installing;
+            StatusMessage = $"Installation v{row.Version}…";
+            var folderName = row.Remote.GetInstallFolderName();
+            var target = Path.Combine(_config.InstallRoot, folderName);
+            var installProgress = new Progress<InstallProgress>(ip =>
+            {
+                if (ip.BytesTotal <= 0) return;
+                var pct = (double)ip.BytesDone / ip.BytesTotal * 100.0;
+                ProgressPercent = pct;
+                row.ProgressPercent = pct;
+                ProgressDetail = $"Extraction v{row.Version} : {ip.EntriesDone}/{ip.EntriesTotal} fichiers ({FormatSize(ip.BytesDone)} / {FormatSize(ip.BytesTotal)})";
+                row.ProgressDetail = ProgressDetail;
+            });
+            await _zipInstaller.InstallAsync(zipPath, target, installProgress, ct);
+
+            try { File.Delete(zipPath); } catch { /* non critique */ }
+
+            StatusMessage = $"v{row.Version} installée avec succès";
+            ProgressDetail = null;
+            ProgressPercent = 0;
+            RebuildList();
+        }
+        catch (OperationCanceledException)
+        {
+            StatusMessage = "Téléchargement annulé";
+            row.State = VersionRowState.AvailableIdle;
+            row.ProgressDetail = null;
+            row.ProgressPercent = 0;
+        }
+        catch (Exception ex)
+        {
+            _logger.LogError(ex, "Install failed for {Version}", row.Version);
+            row.State = VersionRowState.AvailableIdle;
+            row.ProgressDetail = null;
+            row.ProgressPercent = 0;
+            MessageBox.Show(
+                $"Le téléchargement ou l'installation a échoué :\n\n{ex.Message}",
+                "Erreur", MessageBoxButton.OK, MessageBoxImage.Error);
+            StatusMessage = $"Erreur : {ex.Message}";
+        }
+        finally
+        {
+            _activeDownloadCts?.Dispose();
+            _activeDownloadCts = null;
+            _activeRow = null;
+            IsBusy = false;
+        }
+    }
+
+    private async Task UninstallVersionAsync(VersionRowViewModel row)
+    {
+        if (row.Installed is null) return;
+
+        var sizeStr = FormatSize(row.SizeBytes);
+        var confirm = MessageBox.Show(
+            $"Supprimer la version v{row.Version} ?\n\nDossier : {row.FolderPath}\nLibérera {sizeStr}.\n\nCette action est irréversible.",
+            "Confirmer la suppression",
+            MessageBoxButton.YesNo, MessageBoxImage.Warning, MessageBoxResult.No);
+
+        if (confirm != MessageBoxResult.Yes) return;
+
+        if (IsBusy) { MessageBox.Show("Une autre opération est déjà en cours.", "Patience", MessageBoxButton.OK, MessageBoxImage.Information); return; }
+
+        IsBusy = true;
+        row.State = VersionRowState.Uninstalling;
+        StatusMessage = $"Suppression v{row.Version}…";
+        try
+        {
+            await _registry.DeleteAsync(row.Version, null, CancellationToken.None);
+            StatusMessage = $"v{row.Version} supprimée";
+            RebuildList();
+        }
+        catch (Exception ex)
+        {
+            _logger.LogError(ex, "Uninstall failed for {Version}", row.Version);
+            row.State = VersionRowState.InstalledIdle;
+            MessageBox.Show($"Suppression échouée : {ex.Message}", "Erreur",
+                MessageBoxButton.OK, MessageBoxImage.Error);
+            StatusMessage = $"Erreur : {ex.Message}";
+        }
+        finally
+        {
+            IsBusy = false;
+        }
+    }
+
+    private async Task ShowReleaseNotesAsync(VersionRowViewModel row)
+    {
+        var url = row.Remote?.ReleaseNotesUrl;
+        if (string.IsNullOrEmpty(url))
+        {
+            MessageBox.Show("Aucune release note disponible pour cette version.",
+                "Release notes", MessageBoxButton.OK, MessageBoxImage.Information);
+            return;
+        }
+        string notes;
+        try { notes = await _manifestService.FetchReleaseNotesAsync(url, CancellationToken.None); }
+        catch (Exception ex)
+        {
+            _logger.LogWarning(ex, "Failed to fetch release notes");
+            MessageBox.Show($"Impossible de récupérer les release notes :\n{ex.Message}",
+                "Erreur", MessageBoxButton.OK, MessageBoxImage.Warning);
+            return;
+        }
+
+        var dlg = new ReleaseNotesViewerDialog(row.Version, notes) { Owner = Application.Current.MainWindow };
+        dlg.ShowDialog();
+    }
+
+    private void OpenVersionFolder(VersionRowViewModel row)
+    {
+        if (string.IsNullOrEmpty(row.FolderPath) || !Directory.Exists(row.FolderPath)) return;
+        Process.Start(new ProcessStartInfo
+        {
+            FileName = row.FolderPath,
+            UseShellExecute = true,
+            Verb = "open"
+        });
+    }
+
+    private void UpdateDlProgress(VersionRowViewModel row, DownloadProgress p)
+    {
+        if (p.TotalBytes > 0)
+        {
+            var pct = (double)p.BytesDownloaded / p.TotalBytes * 100.0;
+            ProgressPercent = pct;
+            row.ProgressPercent = pct;
+        }
+
+        var sb = new System.Text.StringBuilder();
+        sb.Append("⬇ v").Append(row.Version).Append(" : ");
+        sb.Append(FormatSize(p.BytesDownloaded));
+        if (p.TotalBytes > 0) sb.Append(" / ").Append(FormatSize(p.TotalBytes));
+        if (p.BytesPerSecond > 0) sb.Append(" • ").Append(FormatSize((long)p.BytesPerSecond)).Append("/s");
+        if (p.Eta is { } eta && eta.TotalSeconds > 1) sb.Append(" • ETA ").Append(FormatEta(eta));
+        var s = sb.ToString();
+        ProgressDetail = s;
+        row.ProgressDetail = s;
     }
 
     private static string FormatSize(long bytes)

src/PSLauncher.App/ViewModels/VersionRowViewModel.cs

@@ -0,0 +1,139 @@
+using CommunityToolkit.Mvvm.ComponentModel;
+using CommunityToolkit.Mvvm.Input;
+using PSLauncher.Models;
+
+namespace PSLauncher.App.ViewModels;
+
+public enum VersionRowState
+{
+    InstalledIdle,        // Installée localement, pas d'action en cours
+    AvailableIdle,        // Disponible côté serveur, pas installée
+    Downloading,
+    Installing,
+    Uninstalling,
+}
+
+public sealed partial class VersionRowViewModel : ObservableObject
+{
+    public string Version { get; }
+    public DateTime ReleasedAt { get; }
+    public string ExecutablePath { get; }
+    public string FolderPath { get; }
+    public long SizeBytes { get; }
+    public InstalledVersion? Installed { get; }
+    public VersionManifest? Remote { get; }
+    public bool HasReleaseNotes => Remote?.ReleaseNotesUrl is not null;
+
+    [ObservableProperty]
+    [NotifyPropertyChangedFor(nameof(StateLabel))]
+    [NotifyPropertyChangedFor(nameof(IsBusy))]
+    [NotifyPropertyChangedFor(nameof(IsInstalled))]
+    [NotifyPropertyChangedFor(nameof(IsRemoteOnly))]
+    [NotifyCanExecuteChangedFor(nameof(LaunchCommand))]
+    [NotifyCanExecuteChangedFor(nameof(InstallCommand))]
+    [NotifyCanExecuteChangedFor(nameof(UninstallCommand))]
+    private VersionRowState _state;
+
+    [ObservableProperty] private double _progressPercent;
+    [ObservableProperty] private string? _progressDetail;
+
+    public bool IsInstalled => State is VersionRowState.InstalledIdle or VersionRowState.Uninstalling;
+    public bool IsRemoteOnly => State is VersionRowState.AvailableIdle;
+    public bool IsBusy => State is VersionRowState.Downloading or VersionRowState.Installing or VersionRowState.Uninstalling;
+
+    public string StateLabel => State switch
+    {
+        VersionRowState.InstalledIdle => "● Installée",
+        VersionRowState.AvailableIdle => "○ Disponible",
+        VersionRowState.Downloading   => "⬇ Téléchargement…",
+        VersionRowState.Installing    => "📦 Installation…",
+        VersionRowState.Uninstalling  => "🗑 Suppression…",
+        _ => string.Empty
+    };
+
+    public string PrimaryDate => ReleasedAt > DateTime.MinValue
+        ? ReleasedAt.ToLocalTime().ToString("dd/MM/yyyy")
+        : "—";
+
+    public string SizeDisplay => FormatSize(SizeBytes);
+
+    /// <summary>Constructeur ligne « installée localement » (peut aussi être présente en remote).</summary>
+    public static VersionRowViewModel ForInstalled(InstalledVersion installed, VersionManifest? remote)
+    {
+        return new VersionRowViewModel(
+            version: installed.Version,
+            releasedAt: remote?.ReleasedAt ?? installed.InstalledAt,
+            executablePath: installed.ExecutablePath,
+            folderPath: installed.FolderPath,
+            sizeBytes: installed.SizeBytes,
+            installed: installed,
+            remote: remote,
+            initialState: VersionRowState.InstalledIdle);
+    }
+
+    /// <summary>Constructeur ligne « disponible côté serveur uniquement ».</summary>
+    public static VersionRowViewModel ForRemote(VersionManifest remote)
+    {
+        return new VersionRowViewModel(
+            version: remote.Version,
+            releasedAt: remote.ReleasedAt,
+            executablePath: string.Empty,
+            folderPath: string.Empty,
+            sizeBytes: remote.Download.SizeBytes,
+            installed: null,
+            remote: remote,
+            initialState: VersionRowState.AvailableIdle);
+    }
+
+    private VersionRowViewModel(
+        string version, DateTime releasedAt, string executablePath, string folderPath,
+        long sizeBytes, InstalledVersion? installed, VersionManifest? remote,
+        VersionRowState initialState)
+    {
+        Version = version;
+        ReleasedAt = releasedAt;
+        ExecutablePath = executablePath;
+        FolderPath = folderPath;
+        SizeBytes = sizeBytes;
+        Installed = installed;
+        Remote = remote;
+        _state = initialState;
+    }
+
+    // Les commandes sont câblées par le MainViewModel après instanciation
+    // (les actions ont besoin de services).
+
+    public Action<VersionRowViewModel>? LaunchHandler { get; set; }
+    public Action<VersionRowViewModel>? InstallHandler { get; set; }
+    public Action<VersionRowViewModel>? UninstallHandler { get; set; }
+    public Action<VersionRowViewModel>? ShowReleaseNotesHandler { get; set; }
+    public Action<VersionRowViewModel>? OpenFolderHandler { get; set; }
+
+    [RelayCommand(CanExecute = nameof(CanLaunch))]
+    private void Launch() => LaunchHandler?.Invoke(this);
+    private bool CanLaunch() => State == VersionRowState.InstalledIdle;
+
+    [RelayCommand(CanExecute = nameof(CanInstall))]
+    private void Install() => InstallHandler?.Invoke(this);
+    private bool CanInstall() => State == VersionRowState.AvailableIdle;
+
+    [RelayCommand(CanExecute = nameof(CanUninstall))]
+    private void Uninstall() => UninstallHandler?.Invoke(this);
+    private bool CanUninstall() => State == VersionRowState.InstalledIdle;
+
+    [RelayCommand]
+    private void ShowReleaseNotes() => ShowReleaseNotesHandler?.Invoke(this);
+
+    [RelayCommand]
+    private void OpenFolder() => OpenFolderHandler?.Invoke(this);
+
+    private static string FormatSize(long bytes)
+    {
+        if (bytes <= 0) return "—";
+        string[] units = { "o", "Ko", "Mo", "Go", "To" };
+        double v = bytes;
+        int u = 0;
+        while (v >= 1024 && u < units.Length - 1) { v /= 1024; u++; }
+        return $"{v:0.#} {units[u]}";
+    }
+}

src/PSLauncher.App/Views/MainWindow.xaml

@@ -2,10 +2,9 @@
         xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
         xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
         xmlns:vm="clr-namespace:PSLauncher.App.ViewModels"
-        xmlns:views="clr-namespace:PSLauncher.App.Views"
         Title="PROSERVE Launcher"
-        Width="1280" Height="800"
+        Width="960" Height="720"
-        MinWidth="900" MinHeight="600"
+        MinWidth="780" MinHeight="500"
         WindowStartupLocation="CenterScreen"
         d:DataContext="{d:DesignInstance Type=vm:MainViewModel}"
         xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
@@ -16,7 +15,7 @@
         <Grid.RowDefinitions>
             <RowDefinition Height="Auto" />   <!-- Top bar -->
             <RowDefinition Height="*" />      <!-- Body -->
-            <RowDefinition Height="Auto" />   <!-- Footer (download) -->
+            <RowDefinition Height="Auto" />   <!-- Footer -->
         </Grid.RowDefinitions>
 
         <!-- Top bar -->
@@ -24,7 +23,8 @@
                 BorderBrush="{StaticResource Brush.Border}" BorderThickness="0,0,0,1"
                 Padding="20,12">
             <Grid>
-                <TextBlock Text="PROSERVE" FontSize="18" FontWeight="Bold"
+                <TextBlock Text="PROSERVE  Launcher"
+                           FontSize="18" FontWeight="Bold"
                            Foreground="{StaticResource Brush.Text.Primary}"
                            VerticalAlignment="Center" />
                 <StackPanel HorizontalAlignment="Right" Orientation="Horizontal" VerticalAlignment="Center">
@@ -35,116 +35,160 @@
             </Grid>
         </Border>
 
-        <!-- Body : sidebar + content -->
+        <!-- Body -->
-        <Grid Grid.Row="1">
+        <ScrollViewer Grid.Row="1" VerticalScrollBarVisibility="Auto">
-            <Grid.ColumnDefinitions>
+            <StackPanel Margin="32,24">
-                <ColumnDefinition Width="200" />
-                <ColumnDefinition Width="*" />
-            </Grid.ColumnDefinitions>
 
-            <!-- Sidebar -->
+                <!-- Header / actions -->
-            <Border Grid.Column="0" Background="{StaticResource Brush.Bg.Sidebar}"
+                <Grid Margin="0,0,0,16">
-                    BorderBrush="{StaticResource Brush.Border}" BorderThickness="0,0,1,0">
-                <StackPanel>
-                    <RadioButton Style="{StaticResource SidebarItem}" GroupName="Nav"
-                                 Content="📚  Bibliothèque" IsChecked="True" />
-                    <RadioButton Style="{StaticResource SidebarItem}" GroupName="Nav"
-                                 Content="📰  Nouveautés" IsEnabled="False" />
-                    <RadioButton Style="{StaticResource SidebarItem}" GroupName="Nav"
-                                 Content="⚙️  Paramètres" IsEnabled="False" />
-                </StackPanel>
-            </Border>
-
-            <!-- Library content -->
-            <ScrollViewer Grid.Column="1" VerticalScrollBarVisibility="Auto">
-                <StackPanel Margin="40,30">
-
-                    <!-- Hero -->
-                    <Border Background="#2A2A30" CornerRadius="8" Height="280"
-                            BorderBrush="{StaticResource Brush.Border}" BorderThickness="1">
-                        <Grid>
-                            <TextBlock Text="PROSERVE"
-                                       FontSize="64" FontWeight="Bold"
-                                       Foreground="#3D3D45"
-                                       HorizontalAlignment="Center" VerticalAlignment="Center" />
-                            <Border VerticalAlignment="Bottom" HorizontalAlignment="Left"
-                                    Margin="24" Background="#000000B0"
-                                    CornerRadius="4" Padding="12,6">
-                                <TextBlock Text="{Binding HeroTitle}"
-                                           FontSize="22" FontWeight="SemiBold"
-                                           Foreground="White" />
-                            </Border>
-                        </Grid>
-                    </Border>
-
-                    <!-- Action row -->
-                    <Grid Margin="0,24,0,0">
-                        <Grid.ColumnDefinitions>
-                            <ColumnDefinition Width="Auto" />
-                            <ColumnDefinition Width="*" />
-                            <ColumnDefinition Width="Auto" />
-                        </Grid.ColumnDefinitions>
-
-                        <!-- Version selector -->
-                        <StackPanel Grid.Column="0" Orientation="Horizontal" VerticalAlignment="Center">
-                            <TextBlock Text="Version :" Foreground="{StaticResource Brush.Text.Secondary}"
-                                       VerticalAlignment="Center" Margin="0,0,10,0" />
-                            <ComboBox Width="160"
-                                      ItemsSource="{Binding InstalledVersions}"
-                                      DisplayMemberPath="Display"
-                                      SelectedItem="{Binding SelectedVersion, Mode=TwoWay}" />
-                            <Border Style="{StaticResource VersionPill}" Margin="12,0,0,0">
-                                <TextBlock Text="{Binding StatusBadge}" FontSize="12"
-                                           Foreground="{StaticResource Brush.Text.Primary}" />
-                            </Border>
-                        </StackPanel>
-
-                        <!-- Primary action -->
-                        <Button Grid.Column="2"
-                                Style="{StaticResource PrimaryButton}"
-                                Content="{Binding PrimaryActionLabel}"
-                                Command="{Binding PrimaryActionCommand}"
-                                IsEnabled="{Binding PrimaryActionEnabled}" />
-                    </Grid>
-
-                    <!-- Secondary actions -->
-                    <StackPanel Orientation="Horizontal" Margin="0,16,0,0">
-                        <Button Style="{StaticResource SecondaryButton}"
-                                Content="🔄  Vérifier les mises à jour"
-                                Command="{Binding CheckForUpdatesCommand}"
-                                Margin="0,0,10,0" />
-                        <Button Style="{StaticResource SecondaryButton}"
-                                Content="📁  Ouvrir le dossier"
-                                Command="{Binding OpenFolderCommand}"
-                                Margin="0,0,10,0" />
-                        <Button Style="{StaticResource SecondaryButton}"
-                                Content="🔍  Rescanner local"
-                                Command="{Binding RefreshCommand}" />
-                    </StackPanel>
-
-                    <!-- Installed versions list -->
-                    <TextBlock Text="Versions installées" FontSize="16" FontWeight="SemiBold"
-                               Margin="0,30,0,12"
-                               Foreground="{StaticResource Brush.Text.Primary}" />
-                    <ItemsControl ItemsSource="{Binding InstalledVersions}">
-                        <ItemsControl.ItemTemplate>
-                            <DataTemplate>
-                                <Border Background="{StaticResource Brush.Bg.Card}"
-                                        CornerRadius="6" Margin="0,0,0,8" Padding="16,12"
-                                        BorderBrush="{StaticResource Brush.Border}" BorderThickness="1">
-                                    <Grid>
                     <Grid.ColumnDefinitions>
                         <ColumnDefinition Width="*" />
                         <ColumnDefinition Width="Auto" />
                     </Grid.ColumnDefinitions>
                     <StackPanel Grid.Column="0">
-                                            <TextBlock Text="{Binding Display}"
+                        <TextBlock Text="Versions"
-                                                       FontSize="15" FontWeight="SemiBold" />
+                                   FontSize="22" FontWeight="SemiBold"
-                                            <TextBlock Text="{Binding Subtitle}"
+                                   Foreground="{StaticResource Brush.Text.Primary}" />
+                        <TextBlock Text="Lance, installe ou supprime une version. Les versions installées et celles disponibles sur le serveur cohabitent."
                                    FontSize="12"
                                    Foreground="{StaticResource Brush.Text.Secondary}"
-                                                       Margin="0,2,0,0" />
+                                   Margin="0,4,0,0"
+                                   TextWrapping="Wrap" />
                     </StackPanel>
+                    <StackPanel Grid.Column="1" Orientation="Horizontal" VerticalAlignment="Center">
+                        <Button Style="{StaticResource SecondaryButton}"
+                                Content="🔄  Vérifier les MAJ"
+                                Command="{Binding CheckForUpdatesCommand}"
+                                Margin="0,0,8,0" />
+                        <Button Style="{StaticResource SecondaryButton}"
+                                Content="📁  Dossier"
+                                Command="{Binding OpenInstallRootCommand}" />
+                    </StackPanel>
+                </Grid>
+
+                <!-- Version list -->
+                <ItemsControl ItemsSource="{Binding Versions}">
+                    <ItemsControl.ItemTemplate>
+                        <DataTemplate DataType="{x:Type vm:VersionRowViewModel}">
+                            <Border Margin="0,0,0,8"
+                                    CornerRadius="6"
+                                    BorderThickness="1">
+                                <Border.Style>
+                                    <Style TargetType="Border">
+                                        <Setter Property="Background" Value="{StaticResource Brush.Bg.Card}" />
+                                        <Setter Property="BorderBrush" Value="{StaticResource Brush.Border}" />
+                                        <Style.Triggers>
+                                            <DataTrigger Binding="{Binding IsRemoteOnly}" Value="True">
+                                                <Setter Property="Background" Value="#1F2A3A" />
+                                                <Setter Property="BorderBrush" Value="#2C4D7A" />
+                                            </DataTrigger>
+                                            <DataTrigger Binding="{Binding IsBusy}" Value="True">
+                                                <Setter Property="Background" Value="#2A2F26" />
+                                                <Setter Property="BorderBrush" Value="#5C8C3F" />
+                                            </DataTrigger>
+                                        </Style.Triggers>
+                                    </Style>
+                                </Border.Style>
+
+                                <Grid Margin="16,12">
+                                    <Grid.ColumnDefinitions>
+                                        <ColumnDefinition Width="*" />
+                                        <ColumnDefinition Width="Auto" />
+                                        <ColumnDefinition Width="Auto" />
+                                    </Grid.ColumnDefinitions>
+                                    <Grid.RowDefinitions>
+                                        <RowDefinition Height="Auto" />
+                                        <RowDefinition Height="Auto" />
+                                    </Grid.RowDefinitions>
+
+                                    <!-- Left : version, state, meta -->
+                                    <StackPanel Grid.Row="0" Grid.Column="0" Orientation="Horizontal">
+                                        <TextBlock Text="{Binding Version, StringFormat='v{0}'}"
+                                                   FontSize="16" FontWeight="SemiBold"
+                                                   VerticalAlignment="Center"
+                                                   Foreground="{StaticResource Brush.Text.Primary}" />
+                                        <Border Background="#0F0F12" CornerRadius="10"
+                                                Padding="8,3" Margin="12,0,0,0"
+                                                VerticalAlignment="Center">
+                                            <TextBlock Text="{Binding StateLabel}"
+                                                       FontSize="11"
+                                                       Foreground="{StaticResource Brush.Text.Secondary}" />
+                                        </Border>
+                                    </StackPanel>
+
+                                    <TextBlock Grid.Row="1" Grid.Column="0"
+                                               FontSize="11"
+                                               Foreground="{StaticResource Brush.Text.Secondary}"
+                                               Margin="0,4,0,0">
+                                        <Run Text="{Binding SizeDisplay, Mode=OneWay}" />
+                                        <Run Text=" • " />
+                                        <Run Text="{Binding PrimaryDate, Mode=OneWay}" />
+                                    </TextBlock>
+
+                                    <!-- Center : action button (Lancer / Installer / Annuler) -->
+                                    <StackPanel Grid.Row="0" Grid.RowSpan="2" Grid.Column="1"
+                                                Orientation="Horizontal"
+                                                VerticalAlignment="Center"
+                                                Margin="12,0,0,0">
+
+                                        <!-- Bouton LANCER (installée) -->
+                                        <Button Style="{StaticResource PrimaryButton}"
+                                                Content="▶  Lancer"
+                                                Padding="22,8"
+                                                FontSize="14"
+                                                Command="{Binding LaunchCommand}"
+                                                Visibility="{Binding IsInstalled, Converter={StaticResource BoolToVisibility}}" />
+
+                                        <!-- Bouton INSTALLER (remote uniquement) -->
+                                        <Button Style="{StaticResource AccentButton}"
+                                                Content="⬇  Installer"
+                                                Padding="22,8"
+                                                FontSize="14"
+                                                Command="{Binding InstallCommand}"
+                                                Visibility="{Binding IsRemoteOnly, Converter={StaticResource BoolToVisibility}}" />
+
+                                        <!-- Pendant DL/install : barre de progression compacte -->
+                                        <StackPanel Orientation="Horizontal"
+                                                    Visibility="{Binding IsBusy, Converter={StaticResource BoolToVisibility}}">
+                                            <ProgressBar Width="160" Height="6"
+                                                         Value="{Binding ProgressPercent}"
+                                                         Maximum="100"
+                                                         Foreground="{StaticResource Brush.Play}"
+                                                         Background="#2A2A30"
+                                                         BorderThickness="0"
+                                                         VerticalAlignment="Center" />
+                                            <TextBlock Text="{Binding ProgressPercent, StringFormat={}{0:0}%}"
+                                                       FontSize="11"
+                                                       Margin="8,0,0,0"
+                                                       VerticalAlignment="Center"
+                                                       Foreground="{StaticResource Brush.Text.Secondary}" />
+                                        </StackPanel>
+                                    </StackPanel>
+
+                                    <!-- Right : ... menu -->
+                                    <Button Grid.Row="0" Grid.RowSpan="2" Grid.Column="2"
+                                            Style="{StaticResource IconButton}"
+                                            Content="⋯"
+                                            FontSize="18" FontWeight="Bold"
+                                            Margin="8,0,0,0"
+                                            VerticalAlignment="Center"
+                                            ToolTip="Plus d'actions"
+                                            Tag="{Binding}"
+                                            Click="OnMoreMenuClick">
+                                        <Button.ContextMenu>
+                                            <ContextMenu>
+                                                <MenuItem Header="📜  Voir les release notes"
+                                                          Command="{Binding PlacementTarget.Tag.ShowReleaseNotesCommand, RelativeSource={RelativeSource AncestorType=ContextMenu}}" />
+                                                <MenuItem Header="📁  Ouvrir le dossier"
+                                                          Command="{Binding PlacementTarget.Tag.OpenFolderCommand, RelativeSource={RelativeSource AncestorType=ContextMenu}}"
+                                                          Visibility="{Binding PlacementTarget.Tag.IsInstalled, RelativeSource={RelativeSource AncestorType=ContextMenu}, Converter={StaticResource BoolToVisibility}}" />
+                                                <Separator Visibility="{Binding PlacementTarget.Tag.IsInstalled, RelativeSource={RelativeSource AncestorType=ContextMenu}, Converter={StaticResource BoolToVisibility}}" />
+                                                <MenuItem Header="🗑  Supprimer cette version…"
+                                                          Command="{Binding PlacementTarget.Tag.UninstallCommand, RelativeSource={RelativeSource AncestorType=ContextMenu}}"
+                                                          Visibility="{Binding PlacementTarget.Tag.IsInstalled, RelativeSource={RelativeSource AncestorType=ContextMenu}, Converter={StaticResource BoolToVisibility}}" />
+                                            </ContextMenu>
+                                        </Button.ContextMenu>
+                                    </Button>
                                 </Grid>
                             </Border>
                         </DataTemplate>
@@ -152,16 +196,20 @@
                 </ItemsControl>
 
                 <!-- Empty state -->
+                <Border Background="{StaticResource Brush.Bg.Card}"
+                        BorderBrush="{StaticResource Brush.Border}" BorderThickness="1"
+                        CornerRadius="6"
+                        Padding="32"
+                        Visibility="{Binding EmptyHintVisibility}">
                     <TextBlock Text="{Binding EmptyHint}"
                                Foreground="{StaticResource Brush.Text.Secondary}"
-                               TextWrapping="Wrap" Margin="0,12,0,0"
+                               TextWrapping="Wrap" />
-                               Visibility="{Binding EmptyHintVisibility}" />
+                </Border>
 
             </StackPanel>
         </ScrollViewer>
-        </Grid>
 
-        <!-- Footer (download/install status) -->
+        <!-- Footer (busy / status) -->
         <Border Grid.Row="2" Background="{StaticResource Brush.Bg.Footer}"
                 BorderBrush="{StaticResource Brush.Border}" BorderThickness="0,1,0,0"
                 Padding="20,8"

src/PSLauncher.App/Views/MainWindow.xaml.cs

@@ -1,4 +1,6 @@
 using System.Windows;
+using System.Windows.Controls;
+using System.Windows.Controls.Primitives;
 
 namespace PSLauncher.App.Views;
 
@@ -8,4 +10,17 @@ public partial class MainWindow : Window
     {
         InitializeComponent();
     }
+
+    /// <summary>
+    /// Le bouton "..." ouvre son ContextMenu sur clic gauche (par défaut, ContextMenu ne s'ouvre qu'au clic droit).
+    /// </summary>
+    private void OnMoreMenuClick(object sender, RoutedEventArgs e)
+    {
+        if (sender is Button btn && btn.ContextMenu is { } menu)
+        {
+            menu.PlacementTarget = btn;
+            menu.Placement = PlacementMode.Bottom;
+            menu.IsOpen = true;
+        }
+    }
 }

src/PSLauncher.App/Views/ReleaseNotesViewerDialog.xaml

@@ -0,0 +1,42 @@
+<Window x:Class="PSLauncher.App.Views.ReleaseNotesViewerDialog"
+        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
+        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
+        Title="Notes de version"
+        Width="640" Height="540"
+        MinWidth="480" MinHeight="400"
+        WindowStartupLocation="CenterOwner"
+        Background="{StaticResource Brush.Bg.Window}">
+    <Grid Margin="24">
+        <Grid.RowDefinitions>
+            <RowDefinition Height="Auto" />
+            <RowDefinition Height="*" />
+            <RowDefinition Height="Auto" />
+        </Grid.RowDefinitions>
+
+        <TextBlock Grid.Row="0"
+                   Text="{Binding Title}"
+                   FontSize="22" FontWeight="SemiBold"
+                   Margin="0,0,0,18"
+                   Foreground="{StaticResource Brush.Text.Primary}" />
+
+        <Border Grid.Row="1"
+                Background="{StaticResource Brush.Bg.Card}"
+                BorderBrush="{StaticResource Brush.Border}" BorderThickness="1"
+                CornerRadius="6"
+                Padding="16">
+            <FlowDocumentScrollViewer
+                Document="{Binding ReleaseNotesDocument}"
+                Foreground="{StaticResource Brush.Text.Primary}"
+                Background="Transparent" />
+        </Border>
+
+        <Button Grid.Row="2"
+                Style="{StaticResource SecondaryButton}"
+                Content="Fermer"
+                IsCancel="True"
+                IsDefault="True"
+                HorizontalAlignment="Right"
+                Margin="0,18,0,0"
+                Click="OnClose" />
+    </Grid>
+</Window>

src/PSLauncher.App/Views/ReleaseNotesViewerDialog.xaml.cs

@@ -0,0 +1,37 @@
+using System.Windows;
+using System.Windows.Documents;
+using Markdig;
+using Markdig.Wpf;
+
+namespace PSLauncher.App.Views;
+
+public partial class ReleaseNotesViewerDialog : Window
+{
+    public ReleaseNotesViewerDialog(string version, string releaseNotesMarkdown)
+    {
+        InitializeComponent();
+
+        var pipeline = new MarkdownPipelineBuilder().UseSupportedExtensions().Build();
+        FlowDocument doc;
+        try
+        {
+            doc = Markdig.Wpf.Markdown.ToFlowDocument(releaseNotesMarkdown, pipeline);
+        }
+        catch
+        {
+            doc = new FlowDocument(new Paragraph(new Run(releaseNotesMarkdown)));
+        }
+
+        DataContext = new
+        {
+            Title = $"Notes de version — v{version}",
+            ReleaseNotesDocument = doc
+        };
+    }
+
+    private void OnClose(object sender, RoutedEventArgs e)
+    {
+        DialogResult = false;
+        Close();
+    }
+}