Merge branch 'main' of https://git.azuze.fr/kawa/Sharepoint-Toolbox

SharepointToolbox/App.xaml.cs

@@ -142,6 +142,11 @@ public partial class App : Application
         services.AddTransient<DuplicatesViewModel>();
         services.AddTransient<DuplicatesView>();
 
+        // Versions cleanup
+        services.AddTransient<IVersionCleanupService, VersionCleanupService>();
+        services.AddTransient<VersionCleanupViewModel>();
+        services.AddTransient<VersionCleanupView>();
+
         // Phase 2: Permissions
         services.AddTransient<IPermissionsService, PermissionsService>();
         services.AddTransient<ISiteListService, SiteListService>();

SharepointToolbox/Core/Models/VersionCleanupOptions.cs

@@ -0,0 +1,9 @@
+namespace SharepointToolbox.Core.Models;
+
+public record VersionCleanupOptions(
+    IReadOnlyList<string> LibraryTitles,
+    int KeepLast,
+    bool KeepFirst)
+{
+    public static VersionCleanupOptions Default => new(Array.Empty<string>(), 5, false);
+}

SharepointToolbox/Core/Models/VersionCleanupResult.cs

@@ -0,0 +1,14 @@
+namespace SharepointToolbox.Core.Models;
+
+public class VersionCleanupResult
+{
+    public string SiteUrl { get; init; } = string.Empty;
+    public string Library { get; init; } = string.Empty;
+    public string FileServerRelativeUrl { get; init; } = string.Empty;
+    public string FileName { get; init; } = string.Empty;
+    public int VersionsBefore { get; init; }
+    public int VersionsDeleted { get; init; }
+    public int VersionsRemaining { get; init; }
+    public long BytesFreed { get; init; }
+    public string? Error { get; init; }
+}

SharepointToolbox/Infrastructure/Auth/GraphClientFactory.cs

@@ -45,14 +45,13 @@ public class GraphClientFactory
     {
         var pca = await _msalFactory.GetOrCreateAsync(clientId);
 
-        // When a tenant is specified we must NOT reuse cached accounts from /common
+        // Always reuse a cached account when one exists — `WithTenantId` on the
-        // (or a different tenant) — they route tokens to the wrong authority.
+        // silent/interactive call redirects the authority, and MSAL stores
-        IAccount? account = null;
+        // refresh tokens per tenant. Skipping the cached account forces an
-        if (tenantId is null)
+        // interactive prompt on every Graph call (the bug that produced 4–5
-        {
+        // sign-in windows during app registration).
         var accounts = await pca.GetAccountsAsync();
-            account = accounts.FirstOrDefault();
+        var account = accounts.FirstOrDefault();
-        }
 
         var graphScopes = scopes ?? new[] { "https://graph.microsoft.com/.default" };
 
@@ -68,7 +67,7 @@ public class GraphClientFactory
 internal class MsalTokenProvider : IAccessTokenProvider
 {
     private readonly IPublicClientApplication _pca;
-    private readonly IAccount? _account;
+    private IAccount? _account;
     private readonly string[] _scopes;
     private readonly string? _tenantId;
 
@@ -86,6 +85,17 @@ internal class MsalTokenProvider : IAccessTokenProvider
         Uri uri,
         Dictionary<string, object>? additionalAuthenticationContext = null,
         CancellationToken cancellationToken = default)
+    {
+        // Refresh _account from PCA cache each call — interactive flows on a
+        // sibling token provider populate the cache, and we want the next
+        // request on this provider to use that account silently.
+        if (_account is null)
+        {
+            var accounts = await _pca.GetAccountsAsync();
+            _account = accounts.FirstOrDefault();
+        }
+
+        if (_account is not null)
         {
             try
             {
@@ -96,10 +106,15 @@ internal class MsalTokenProvider : IAccessTokenProvider
             }
             catch (MsalUiRequiredException)
             {
+                // fall through to interactive
+            }
+        }
+
         var interactive = _pca.AcquireTokenInteractive(_scopes);
         if (_tenantId is not null) interactive = interactive.WithTenantId(_tenantId);
-            var result = await interactive.ExecuteAsync(cancellationToken);
+        var interactiveResult = await interactive.ExecuteAsync(cancellationToken);
-            return result.AccessToken;
+        // Cache the account so subsequent calls on this provider go silent.
-        }
+        _account = interactiveResult.Account;
+        return interactiveResult.AccessToken;
     }
 }

SharepointToolbox/Localization/Strings.fr.resx

@@ -82,6 +82,103 @@
   <data name="tab.duplicates" xml:space="preserve">
     <value>Doublons</value>
   </data>
+  <data name="tab.versions" xml:space="preserve">
+    <value>Versions</value>
+  </data>
+  <data name="versions.tab" xml:space="preserve">
+    <value>Nettoyage des versions</value>
+  </data>
+  <data name="versions.grp.libs" xml:space="preserve">
+    <value>Bibliothèques</value>
+  </data>
+  <data name="versions.grp.policy" xml:space="preserve">
+    <value>Politique de conservation</value>
+  </data>
+  <data name="versions.btn.pickLibs" xml:space="preserve">
+    <value>Choisir des bibliothèques…</value>
+  </data>
+  <data name="versions.btn.clearLibs" xml:space="preserve">
+    <value>Réinitialiser (toutes les bibliothèques)</value>
+  </data>
+  <data name="versions.btn.run" xml:space="preserve">
+    <value>Supprimer les anciennes versions</value>
+  </data>
+  <data name="versions.lbl.keepLast" xml:space="preserve">
+    <value>Conserver les dernières&#160;:</value>
+  </data>
+  <data name="versions.chk.keepFirst" xml:space="preserve">
+    <value>Conserver aussi la toute première version</value>
+  </data>
+  <data name="versions.chk.confirm" xml:space="preserve">
+    <value>Demander confirmation avant l'exécution</value>
+  </data>
+  <data name="versions.note" xml:space="preserve">
+    <value>Seules les versions historiques sont supprimées. La version courante publiée est toujours conservée. L'action est irréversible.</value>
+  </data>
+  <data name="versions.libs.all" xml:space="preserve">
+    <value>Toutes les bibliothèques (aucun filtre)</value>
+  </data>
+  <data name="versions.libs.count" xml:space="preserve">
+    <value>{0} bibliothèque(s) sélectionnée(s)</value>
+  </data>
+  <data name="versions.confirm" xml:space="preserve">
+    <value>Supprimer les versions historiques en gardant les {0} dernières {1}&#160;?
+Cette action est irréversible.</value>
+  </data>
+  <data name="versions.confirm.keepFirst" xml:space="preserve">
+    <value>(plus la première version)</value>
+  </data>
+  <data name="versions.err.keepLast" xml:space="preserve">
+    <value>«&#160;Conserver les dernières&#160;» doit être supérieur ou égal à 0.</value>
+  </data>
+  <data name="versions.summary.files" xml:space="preserve">
+    <value>Fichiers nettoyés&#160;:</value>
+  </data>
+  <data name="versions.summary.deleted" xml:space="preserve">
+    <value>Versions supprimées&#160;:</value>
+  </data>
+  <data name="versions.summary.freed" xml:space="preserve">
+    <value>Octets libérés&#160;:</value>
+  </data>
+  <data name="versions.col.library" xml:space="preserve">
+    <value>Bibliothèque</value>
+  </data>
+  <data name="versions.col.file" xml:space="preserve">
+    <value>Fichier</value>
+  </data>
+  <data name="versions.col.before" xml:space="preserve">
+    <value>Avant</value>
+  </data>
+  <data name="versions.col.deleted" xml:space="preserve">
+    <value>Supprimées</value>
+  </data>
+  <data name="versions.col.remaining" xml:space="preserve">
+    <value>Restantes</value>
+  </data>
+  <data name="versions.col.freed" xml:space="preserve">
+    <value>Libérés</value>
+  </data>
+  <data name="versions.col.path" xml:space="preserve">
+    <value>Chemin</value>
+  </data>
+  <data name="versions.col.error" xml:space="preserve">
+    <value>Erreur</value>
+  </data>
+  <data name="librarypicker.title" xml:space="preserve">
+    <value>Sélectionner les bibliothèques</value>
+  </data>
+  <data name="librarypicker.loading" xml:space="preserve">
+    <value>Chargement des bibliothèques…</value>
+  </data>
+  <data name="librarypicker.loaded" xml:space="preserve">
+    <value>{0} bibliothèques chargées.</value>
+  </data>
+  <data name="librarypicker.selectAll" xml:space="preserve">
+    <value>Tout sélectionner</value>
+  </data>
+  <data name="librarypicker.selectNone" xml:space="preserve">
+    <value>Tout désélectionner</value>
+  </data>
   <data name="tab.templates" xml:space="preserve">
     <value>Modèles</value>
   </data>
@@ -148,6 +245,18 @@
   <data name="profile.delete" xml:space="preserve">
     <value>Supprimer</value>
   </data>
+  <data name="profile.add.tooltip" xml:space="preserve">
+    <value>Créer un nouveau profil à partir des valeurs ci-dessus.</value>
+  </data>
+  <data name="profile.save.tooltip" xml:space="preserve">
+    <value>Enregistrer les modifications du profil sélectionné.</value>
+  </data>
+  <data name="profile.delete.tooltip" xml:space="preserve">
+    <value>Supprimer le profil sélectionné.</value>
+  </data>
+  <data name="profile.register.warning" xml:space="preserve">
+    <value>L'enregistrement de l'application peut nécessiter jusqu'à {0} connexions. Continuer&#160;?</value>
+  </data>
   <data name="status.ready" xml:space="preserve">
     <value>Prêt</value>
   </data>

SharepointToolbox/Localization/Strings.resx

@@ -82,6 +82,103 @@
   <data name="tab.duplicates" xml:space="preserve">
     <value>Duplicates</value>
   </data>
+  <data name="tab.versions" xml:space="preserve">
+    <value>Versions</value>
+  </data>
+  <data name="versions.tab" xml:space="preserve">
+    <value>Version cleanup</value>
+  </data>
+  <data name="versions.grp.libs" xml:space="preserve">
+    <value>Libraries</value>
+  </data>
+  <data name="versions.grp.policy" xml:space="preserve">
+    <value>Retention policy</value>
+  </data>
+  <data name="versions.btn.pickLibs" xml:space="preserve">
+    <value>Select libraries...</value>
+  </data>
+  <data name="versions.btn.clearLibs" xml:space="preserve">
+    <value>Reset (all libraries)</value>
+  </data>
+  <data name="versions.btn.run" xml:space="preserve">
+    <value>Delete old versions</value>
+  </data>
+  <data name="versions.lbl.keepLast" xml:space="preserve">
+    <value>Keep last:</value>
+  </data>
+  <data name="versions.chk.keepFirst" xml:space="preserve">
+    <value>Also keep the very first version</value>
+  </data>
+  <data name="versions.chk.confirm" xml:space="preserve">
+    <value>Ask for confirmation before running</value>
+  </data>
+  <data name="versions.note" xml:space="preserve">
+    <value>Only historical versions are removed. The current published version is always kept. The action cannot be undone.</value>
+  </data>
+  <data name="versions.libs.all" xml:space="preserve">
+    <value>All libraries (no filter)</value>
+  </data>
+  <data name="versions.libs.count" xml:space="preserve">
+    <value>{0} library/libraries selected</value>
+  </data>
+  <data name="versions.confirm" xml:space="preserve">
+    <value>Delete historical file versions, keeping the last {0} {1}?
+This cannot be undone.</value>
+  </data>
+  <data name="versions.confirm.keepFirst" xml:space="preserve">
+    <value>(plus the first version)</value>
+  </data>
+  <data name="versions.err.keepLast" xml:space="preserve">
+    <value>"Keep last" must be 0 or greater.</value>
+  </data>
+  <data name="versions.summary.files" xml:space="preserve">
+    <value>Files trimmed:</value>
+  </data>
+  <data name="versions.summary.deleted" xml:space="preserve">
+    <value>Versions deleted:</value>
+  </data>
+  <data name="versions.summary.freed" xml:space="preserve">
+    <value>Bytes freed:</value>
+  </data>
+  <data name="versions.col.library" xml:space="preserve">
+    <value>Library</value>
+  </data>
+  <data name="versions.col.file" xml:space="preserve">
+    <value>File</value>
+  </data>
+  <data name="versions.col.before" xml:space="preserve">
+    <value>Before</value>
+  </data>
+  <data name="versions.col.deleted" xml:space="preserve">
+    <value>Deleted</value>
+  </data>
+  <data name="versions.col.remaining" xml:space="preserve">
+    <value>Remaining</value>
+  </data>
+  <data name="versions.col.freed" xml:space="preserve">
+    <value>Freed</value>
+  </data>
+  <data name="versions.col.path" xml:space="preserve">
+    <value>Path</value>
+  </data>
+  <data name="versions.col.error" xml:space="preserve">
+    <value>Error</value>
+  </data>
+  <data name="librarypicker.title" xml:space="preserve">
+    <value>Select libraries</value>
+  </data>
+  <data name="librarypicker.loading" xml:space="preserve">
+    <value>Loading libraries...</value>
+  </data>
+  <data name="librarypicker.loaded" xml:space="preserve">
+    <value>{0} libraries loaded.</value>
+  </data>
+  <data name="librarypicker.selectAll" xml:space="preserve">
+    <value>Select all</value>
+  </data>
+  <data name="librarypicker.selectNone" xml:space="preserve">
+    <value>Select none</value>
+  </data>
   <data name="tab.templates" xml:space="preserve">
     <value>Templates</value>
   </data>
@@ -148,6 +245,18 @@
   <data name="profile.delete" xml:space="preserve">
     <value>Delete</value>
   </data>
+  <data name="profile.add.tooltip" xml:space="preserve">
+    <value>Create a new profile from the values entered above.</value>
+  </data>
+  <data name="profile.save.tooltip" xml:space="preserve">
+    <value>Save changes to the selected profile.</value>
+  </data>
+  <data name="profile.delete.tooltip" xml:space="preserve">
+    <value>Delete the selected profile.</value>
+  </data>
+  <data name="profile.register.warning" xml:space="preserve">
+    <value>Registering an app may prompt you to sign in up to {0} times. Continue?</value>
+  </data>
   <data name="status.ready" xml:space="preserve">
     <value>Ready</value>
   </data>

SharepointToolbox/MainWindow.xaml

@@ -18,8 +18,6 @@
       <ComboBox Width="220" ItemsSource="{Binding TenantProfiles}"
                 SelectedItem="{Binding SelectedProfile}"
                 DisplayMemberPath="Name" />
-      <Button Content="{Binding Source={x:Static loc:TranslationSource.Instance}, Path=[toolbar.connect]}"
-              Command="{Binding ConnectCommand}" />
       <Button Content="{Binding Source={x:Static loc:TranslationSource.Instance}, Path=[toolbar.manage]}"
               Command="{Binding ManageProfilesCommand}" />
       <Separator />
@@ -63,6 +61,9 @@
       <TabItem x:Name="DuplicatesTabItem"
                Header="{Binding Source={x:Static loc:TranslationSource.Instance}, Path=[tab.duplicates]}">
       </TabItem>
+      <TabItem x:Name="VersionsTabItem"
+               Header="{Binding Source={x:Static loc:TranslationSource.Instance}, Path=[tab.versions]}">
+      </TabItem>
       <TabItem x:Name="TransferTabItem"
                Header="{Binding Source={x:Static loc:TranslationSource.Instance}, Path=[tab.transfer]}">
       </TabItem>

SharepointToolbox/MainWindow.xaml.cs

@@ -40,6 +40,9 @@ public partial class MainWindow : Window
         // Replace Duplicates tab placeholder with the DI-resolved DuplicatesView
         DuplicatesTabItem.Content = serviceProvider.GetRequiredService<DuplicatesView>();
 
+        // Versions cleanup tab
+        VersionsTabItem.Content = serviceProvider.GetRequiredService<VersionCleanupView>();
+
         // Phase 4: Replace stub tabs with DI-resolved Views
         TransferTabItem.Content = serviceProvider.GetRequiredService<TransferView>();
         BulkMembersTabItem.Content = serviceProvider.GetRequiredService<BulkMembersView>();

SharepointToolbox/Services/IVersionCleanupService.cs

@@ -0,0 +1,28 @@
+using Microsoft.SharePoint.Client;
+using SharepointToolbox.Core.Models;
+
+namespace SharepointToolbox.Services;
+
+public interface IVersionCleanupService
+{
+    /// <summary>
+    /// Enumerates document libraries (filtered by <see cref="VersionCleanupOptions.LibraryTitles"/>
+    /// when non-empty) and deletes historical file versions per file according to
+    /// <see cref="VersionCleanupOptions.KeepLast"/> and <see cref="VersionCleanupOptions.KeepFirst"/>.
+    /// The current published version is never touched. Returns one result row per file
+    /// where at least one version was inspected.
+    /// </summary>
+    Task<IReadOnlyList<VersionCleanupResult>> DeleteOldVersionsAsync(
+        ClientContext ctx,
+        VersionCleanupOptions options,
+        IProgress<OperationProgress> progress,
+        CancellationToken ct);
+
+    /// <summary>
+    /// Lists non-hidden document libraries on the site. Used by the library picker
+    /// so callers can present a checkbox UI.
+    /// </summary>
+    Task<IReadOnlyList<string>> ListLibraryTitlesAsync(
+        ClientContext ctx,
+        CancellationToken ct);
+}

SharepointToolbox/Services/VersionCleanupService.cs

@@ -0,0 +1,189 @@
+using Microsoft.Extensions.Logging;
+using Microsoft.SharePoint.Client;
+using SharepointToolbox.Core.Helpers;
+using SharepointToolbox.Core.Models;
+
+namespace SharepointToolbox.Services;
+
+public class VersionCleanupService : IVersionCleanupService
+{
+    private readonly ILogger<VersionCleanupService> _logger;
+
+    public VersionCleanupService(ILogger<VersionCleanupService> logger)
+    {
+        _logger = logger;
+    }
+
+    public async Task<IReadOnlyList<string>> ListLibraryTitlesAsync(
+        ClientContext ctx,
+        CancellationToken ct)
+    {
+        ct.ThrowIfCancellationRequested();
+        ctx.Load(ctx.Web,
+            w => w.Lists.Include(
+                l => l.Title,
+                l => l.Hidden,
+                l => l.BaseType));
+        await ExecuteQueryRetryHelper.ExecuteQueryRetryAsync(ctx, null, ct);
+        return ctx.Web.Lists
+            .Where(l => !l.Hidden && l.BaseType == BaseType.DocumentLibrary)
+            .Select(l => l.Title)
+            .OrderBy(t => t, StringComparer.OrdinalIgnoreCase)
+            .ToList();
+    }
+
+    public async Task<IReadOnlyList<VersionCleanupResult>> DeleteOldVersionsAsync(
+        ClientContext ctx,
+        VersionCleanupOptions options,
+        IProgress<OperationProgress> progress,
+        CancellationToken ct)
+    {
+        ct.ThrowIfCancellationRequested();
+
+        if (options.KeepLast < 0)
+            throw new ArgumentOutOfRangeException(nameof(options), "KeepLast must be >= 0.");
+
+        ctx.Load(ctx.Web, w => w.Url, w => w.ServerRelativeUrl,
+            w => w.Lists.Include(
+                l => l.Title,
+                l => l.Hidden,
+                l => l.BaseType,
+                l => l.RootFolder.ServerRelativeUrl));
+        await ExecuteQueryRetryHelper.ExecuteQueryRetryAsync(ctx, progress, ct);
+
+        var allLibs = ctx.Web.Lists
+            .Where(l => !l.Hidden && l.BaseType == BaseType.DocumentLibrary)
+            .ToList();
+
+        var titleFilter = options.LibraryTitles?.Count > 0
+            ? new HashSet<string>(options.LibraryTitles, StringComparer.OrdinalIgnoreCase)
+            : null;
+
+        var libs = titleFilter is null
+            ? allLibs
+            : allLibs.Where(l => titleFilter.Contains(l.Title)).ToList();
+
+        var results = new List<VersionCleanupResult>();
+        var siteUrl = ctx.Web.Url;
+
+        int libIdx = 0;
+        foreach (var lib in libs)
+        {
+            ct.ThrowIfCancellationRequested();
+            libIdx++;
+            progress.Report(new OperationProgress(libIdx, libs.Count,
+                $"Scanning versions: {lib.Title} ({libIdx}/{libs.Count})"));
+
+            // Enumerate files via paginated CAML so libs > 5,000 items work.
+            var files = new List<string>();
+            await foreach (var item in SharePointPaginationHelper.GetItemsInFolderAsync(
+                ctx, lib, lib.RootFolder.ServerRelativeUrl, recursive: true,
+                viewFields: new[] { "FSObjType", "FileRef" },
+                ct: ct))
+            {
+                if (item["FSObjType"]?.ToString() != "0") continue;
+                var fileRef = item["FileRef"]?.ToString();
+                if (!string.IsNullOrEmpty(fileRef))
+                    files.Add(fileRef);
+            }
+
+            int fileIdx = 0;
+            foreach (var fileRef in files)
+            {
+                ct.ThrowIfCancellationRequested();
+                fileIdx++;
+                if (fileIdx % 25 == 0 || fileIdx == files.Count)
+                {
+                    progress.Report(new OperationProgress(fileIdx, files.Count,
+                        $"{lib.Title}: {fileIdx}/{files.Count} files"));
+                }
+
+                var result = await TrimFileVersionsAsync(
+                    ctx, siteUrl, lib.Title, fileRef, options, progress, ct);
+                if (result is not null)
+                    results.Add(result);
+            }
+        }
+
+        return results;
+    }
+
+    private async Task<VersionCleanupResult?> TrimFileVersionsAsync(
+        ClientContext ctx,
+        string siteUrl,
+        string libraryTitle,
+        string fileServerRelativeUrl,
+        VersionCleanupOptions options,
+        IProgress<OperationProgress> progress,
+        CancellationToken ct)
+    {
+        try
+        {
+            var file = ctx.Web.GetFileByServerRelativeUrl(fileServerRelativeUrl);
+            ctx.Load(file, f => f.Name);
+            ctx.Load(file.Versions,
+                vs => vs.Include(
+                    v => v.VersionLabel,
+                    v => v.Created,
+                    v => v.Size));
+            await ExecuteQueryRetryHelper.ExecuteQueryRetryAsync(ctx, progress, ct);
+
+            // file.Versions contains only HISTORICAL versions; the current published
+            // version lives on `file` itself and is never deletable here.
+            var versions = file.Versions.ToList();
+            int before = versions.Count;
+            if (before == 0) return null;
+
+            // Sort by Created ascending so [0] is the oldest historical version.
+            var ordered = versions
+                .OrderBy(v => v.Created)
+                .ToList();
+
+            // Preserve set: the last N most recent + optionally the very first.
+            var keep = new HashSet<int>();
+            int keepLast = Math.Min(options.KeepLast, ordered.Count);
+            for (int i = ordered.Count - keepLast; i < ordered.Count; i++)
+                keep.Add(i);
+            if (options.KeepFirst && ordered.Count > 0)
+                keep.Add(0);
+
+            long bytesFreed = 0;
+            int deleted = 0;
+            for (int i = 0; i < ordered.Count; i++)
+            {
+                if (keep.Contains(i)) continue;
+                var v = ordered[i];
+                bytesFreed += v.Size;
+                v.DeleteObject();
+                deleted++;
+            }
+
+            if (deleted == 0) return null;
+            await ExecuteQueryRetryHelper.ExecuteQueryRetryAsync(ctx, progress, ct);
+
+            return new VersionCleanupResult
+            {
+                SiteUrl = siteUrl,
+                Library = libraryTitle,
+                FileServerRelativeUrl = fileServerRelativeUrl,
+                FileName = System.IO.Path.GetFileName(fileServerRelativeUrl),
+                VersionsBefore = before,
+                VersionsDeleted = deleted,
+                VersionsRemaining = before - deleted,
+                BytesFreed = bytesFreed,
+            };
+        }
+        catch (Exception ex)
+        {
+            _logger.LogWarning(ex, "Failed to trim versions for {File}", fileServerRelativeUrl);
+            return new VersionCleanupResult
+            {
+                SiteUrl = siteUrl,
+                Library = libraryTitle,
+                FileServerRelativeUrl = fileServerRelativeUrl,
+                FileName = System.IO.Path.GetFileName(fileServerRelativeUrl),
+                Error = ex.Message,
+            };
+        }
+    }
+}

SharepointToolbox/ViewModels/MainWindowViewModel.cs

@@ -50,7 +50,6 @@ public partial class MainWindowViewModel : ObservableRecipient
             ? string.Format(Localization.TranslationSource.Instance["toolbar.globalSites.count"], GlobalSelectedSites.Count)
             : Localization.TranslationSource.Instance["toolbar.globalSites.none"];
 
-    public IAsyncRelayCommand ConnectCommand { get; }
     public IAsyncRelayCommand ClearSessionCommand { get; }
     public RelayCommand ManageProfilesCommand { get; }
     public RelayCommand OpenGlobalSitePickerCommand { get; }
@@ -64,7 +63,6 @@ public partial class MainWindowViewModel : ObservableRecipient
         _sessionManager = sessionManager;
         _logger = logger;
 
-        ConnectCommand = new AsyncRelayCommand(ConnectAsync, () => SelectedProfile != null);
         ClearSessionCommand = new AsyncRelayCommand(ClearSessionAsync, () => SelectedProfile != null);
         ManageProfilesCommand = new RelayCommand(OpenProfileManagement);
         OpenGlobalSitePickerCommand = new RelayCommand(ExecuteOpenGlobalSitePicker, () => SelectedProfile != null);
@@ -96,7 +94,6 @@ public partial class MainWindowViewModel : ObservableRecipient
         {
             WeakReferenceMessenger.Default.Send(new TenantSwitchedMessage(value));
         }
-        ConnectCommand.NotifyCanExecuteChanged();
         ClearSessionCommand.NotifyCanExecuteChanged();
         // Clear global site selection on tenant switch (sites belong to a tenant)
         GlobalSelectedSites.Clear();
@@ -121,22 +118,6 @@ public partial class MainWindowViewModel : ObservableRecipient
         }
     }
 
-    private async Task ConnectAsync()
-    {
-        if (SelectedProfile == null) return;
-        try
-        {
-            ConnectionStatus = "Connecting...";
-            await _sessionManager.GetOrCreateContextAsync(SelectedProfile, CancellationToken.None);
-            ConnectionStatus = SelectedProfile.Name;
-        }
-        catch (Exception ex)
-        {
-            ConnectionStatus = "Connection failed";
-            _logger.LogError(ex, "Failed to connect to tenant {TenantUrl}.", SelectedProfile.TenantUrl);
-        }
-    }
-
     private async Task ClearSessionAsync()
     {
         if (SelectedProfile == null) return;

SharepointToolbox/ViewModels/ProfileManagementViewModel.cs

@@ -346,9 +346,25 @@ public partial class ProfileManagementViewModel : ObservableObject
     private bool CanRemoveApp()
         => SelectedProfile != null && SelectedProfile.AppId != null && !IsRegistering;
 
+    /// <summary>
+    /// Set by the view to display the pre-registration warning. Returns true if the
+    /// user accepts and registration should proceed.
+    /// </summary>
+    public Func<string, bool>? ConfirmRegisterApp { get; set; }
+
     private async Task RegisterAppAsync(CancellationToken ct)
     {
         if (SelectedProfile == null) return;
+
+        // Auth caching reduces this to one prompt in the common case, but a fresh
+        // tenant or different admin account may still trigger up to two — warn so
+        // the user knows another window is expected after they sign in.
+        if (ConfirmRegisterApp != null)
+        {
+            var msg = string.Format(TranslationSource.Instance["profile.register.warning"], 2);
+            if (!ConfirmRegisterApp(msg)) return;
+        }
+
         IsRegistering = true;
         ShowFallbackInstructions = false;
         RegistrationStatus = TranslationSource.Instance["profile.register.checking"];

SharepointToolbox/ViewModels/Tabs/VersionCleanupViewModel.cs

@@ -0,0 +1,237 @@
+using System.Collections.ObjectModel;
+using System.Diagnostics;
+using System.Windows;
+using CommunityToolkit.Mvvm.ComponentModel;
+using CommunityToolkit.Mvvm.Input;
+using Microsoft.Extensions.Logging;
+using Microsoft.Win32;
+using SharepointToolbox.Core.Models;
+using SharepointToolbox.Localization;
+using SharepointToolbox.Services;
+
+namespace SharepointToolbox.ViewModels.Tabs;
+
+public partial class VersionCleanupViewModel : FeatureViewModelBase
+{
+    private readonly IVersionCleanupService _versionService;
+    private readonly ISessionManager _sessionManager;
+    private readonly ILogger<FeatureViewModelBase> _logger;
+    private TenantProfile? _currentProfile;
+
+    [ObservableProperty]
+    private int _keepLast = 5;
+
+    [ObservableProperty]
+    private bool _keepFirstVersion;
+
+    [ObservableProperty]
+    private bool _confirmDelete = true;
+
+    [ObservableProperty]
+    private string _selectedLibrariesLabel = string.Empty;
+
+    public ObservableCollection<string> SelectedLibraries { get; } = new();
+
+    public ObservableCollection<VersionCleanupResult> Results { get; } = new();
+
+    public long TotalBytesFreed => Results.Sum(r => r.BytesFreed);
+    public int TotalVersionsDeleted => Results.Sum(r => r.VersionsDeleted);
+    public int TotalFilesAffected => Results.Count(r => r.VersionsDeleted > 0);
+    public bool HasResults => Results.Count > 0;
+
+    public TenantProfile? CurrentProfile => _currentProfile;
+
+    /// <summary>Set by the view to invoke <see cref="LibraryPickerDialog"/> against the current site.</summary>
+    public Func<string, IReadOnlyCollection<string>, Task<IReadOnlyList<string>?>>? PickLibrariesAsync { get; set; }
+
+    /// <summary>Set by the view to display a confirm dialog before destructive run.</summary>
+    public Func<string, bool>? ConfirmAction { get; set; }
+
+    public IAsyncRelayCommand SelectLibrariesCommand { get; }
+    public IRelayCommand ClearLibrariesCommand { get; }
+    public IAsyncRelayCommand ExportCsvCommand { get; }
+
+    public VersionCleanupViewModel(
+        IVersionCleanupService versionService,
+        ISessionManager sessionManager,
+        ILogger<FeatureViewModelBase> logger)
+        : base(logger)
+    {
+        _versionService = versionService;
+        _sessionManager = sessionManager;
+        _logger = logger;
+
+        SelectLibrariesCommand = new AsyncRelayCommand(SelectLibrariesAsync, CanPickLibraries);
+        ClearLibrariesCommand = new RelayCommand(ClearLibraries);
+        ExportCsvCommand = new AsyncRelayCommand(ExportCsvAsync, () => Results.Count > 0);
+
+        SelectedLibraries.CollectionChanged += (_, _) => UpdateSelectedLibrariesLabel();
+        Results.CollectionChanged += (_, _) =>
+        {
+            OnPropertyChanged(nameof(HasResults));
+            OnPropertyChanged(nameof(TotalBytesFreed));
+            OnPropertyChanged(nameof(TotalVersionsDeleted));
+            OnPropertyChanged(nameof(TotalFilesAffected));
+            ExportCsvCommand.NotifyCanExecuteChanged();
+        };
+        UpdateSelectedLibrariesLabel();
+    }
+
+    protected override void OnTenantSwitched(TenantProfile profile)
+    {
+        _currentProfile = profile;
+        SelectedLibraries.Clear();
+        Results.Clear();
+        OnPropertyChanged(nameof(CurrentProfile));
+        SelectLibrariesCommand.NotifyCanExecuteChanged();
+    }
+
+    protected override void OnGlobalSitesChanged(IReadOnlyList<SiteInfo> sites)
+    {
+        // Site changes invalidate library list — clear so user re-picks.
+        SelectedLibraries.Clear();
+        SelectLibrariesCommand.NotifyCanExecuteChanged();
+    }
+
+    private bool CanPickLibraries() => _currentProfile != null && GlobalSites.Count > 0;
+
+    private async Task SelectLibrariesAsync()
+    {
+        if (PickLibrariesAsync == null || _currentProfile == null) return;
+        var first = GlobalSites.FirstOrDefault();
+        if (first == null)
+        {
+            StatusMessage = TranslationSource.Instance["err.no_sites_selected"];
+            return;
+        }
+
+        var picked = await PickLibrariesAsync(first.Url, SelectedLibraries.ToArray());
+        if (picked == null) return;
+        SelectedLibraries.Clear();
+        foreach (var t in picked) SelectedLibraries.Add(t);
+    }
+
+    private void ClearLibraries() => SelectedLibraries.Clear();
+
+    private void UpdateSelectedLibrariesLabel()
+    {
+        SelectedLibrariesLabel = SelectedLibraries.Count == 0
+            ? TranslationSource.Instance["versions.libs.all"]
+            : string.Format(TranslationSource.Instance["versions.libs.count"], SelectedLibraries.Count);
+    }
+
+    protected override async Task RunOperationAsync(CancellationToken ct, IProgress<OperationProgress> progress)
+    {
+        if (_currentProfile == null)
+        {
+            StatusMessage = TranslationSource.Instance["err.no_tenant_connected"];
+            return;
+        }
+
+        var urls = GlobalSites.Select(s => s.Url).Where(u => !string.IsNullOrWhiteSpace(u)).ToList();
+        if (urls.Count == 0)
+        {
+            StatusMessage = TranslationSource.Instance["err.no_sites_selected"];
+            return;
+        }
+
+        if (KeepLast < 0)
+        {
+            StatusMessage = TranslationSource.Instance["versions.err.keepLast"];
+            return;
+        }
+
+        if (ConfirmDelete && ConfirmAction != null)
+        {
+            var msg = string.Format(
+                TranslationSource.Instance["versions.confirm"],
+                KeepLast,
+                KeepFirstVersion ? TranslationSource.Instance["versions.confirm.keepFirst"] : string.Empty);
+            if (!ConfirmAction(msg)) return;
+        }
+
+        var options = new VersionCleanupOptions(
+            SelectedLibraries.ToList(), KeepLast, KeepFirstVersion);
+
+        Results.Clear();
+        int siteIdx = 0;
+        foreach (var url in urls)
+        {
+            ct.ThrowIfCancellationRequested();
+            siteIdx++;
+            progress.Report(new OperationProgress(siteIdx, urls.Count, $"Cleaning {url}..."));
+
+            var siteProfile = new TenantProfile
+            {
+                TenantUrl = url.TrimEnd('/'),
+                ClientId = _currentProfile.ClientId,
+                Name = _currentProfile.Name,
+            };
+
+            var ctx = await _sessionManager.GetOrCreateContextAsync(siteProfile, ct);
+            var siteResults = await _versionService.DeleteOldVersionsAsync(ctx, options, progress, ct);
+
+            if (Application.Current?.Dispatcher is { } dispatcher)
+            {
+                await dispatcher.InvokeAsync(() =>
+                {
+                    foreach (var r in siteResults) Results.Add(r);
+                });
+            }
+            else
+            {
+                foreach (var r in siteResults) Results.Add(r);
+            }
+        }
+    }
+
+    private async Task ExportCsvAsync()
+    {
+        if (Results.Count == 0) return;
+        var dialog = new SaveFileDialog
+        {
+            Title = "Export version cleanup results",
+            Filter = "CSV files (*.csv)|*.csv",
+            DefaultExt = "csv",
+            FileName = "version_cleanup",
+        };
+        if (dialog.ShowDialog() != true) return;
+        try
+        {
+            using var w = new System.IO.StreamWriter(dialog.FileName);
+            await w.WriteLineAsync("Site,Library,File,Versions Before,Versions Deleted,Versions Remaining,Bytes Freed,Error");
+            foreach (var r in Results)
+            {
+                await w.WriteLineAsync(string.Join(",",
+                    Csv(r.SiteUrl),
+                    Csv(r.Library),
+                    Csv(r.FileServerRelativeUrl),
+                    r.VersionsBefore,
+                    r.VersionsDeleted,
+                    r.VersionsRemaining,
+                    r.BytesFreed,
+                    Csv(r.Error ?? string.Empty)));
+            }
+            try { Process.Start(new ProcessStartInfo(dialog.FileName) { UseShellExecute = true }); }
+            catch { }
+        }
+        catch (Exception ex)
+        {
+            StatusMessage = $"Export failed: {ex.Message}";
+            _logger.LogError(ex, "Version cleanup CSV export failed.");
+        }
+    }
+
+    private static string Csv(string value)
+    {
+        if (string.IsNullOrEmpty(value)) return string.Empty;
+        if (value.Contains(',') || value.Contains('"') || value.Contains('\n'))
+            return "\"" + value.Replace("\"", "\"\"") + "\"";
+        return value;
+    }
+
+    partial void OnKeepLastChanged(int value)
+    {
+        if (value < 0) KeepLast = 0;
+    }
+}

SharepointToolbox/Views/Dialogs/LibraryPickerDialog.xaml

@@ -0,0 +1,42 @@
+<Window x:Class="SharepointToolbox.Views.Dialogs.LibraryPickerDialog"
+        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
+        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
+        xmlns:loc="clr-namespace:SharepointToolbox.Localization"
+        Title="{Binding Source={x:Static loc:TranslationSource.Instance}, Path=[librarypicker.title]}"
+        Width="420" Height="520" WindowStartupLocation="CenterOwner"
+        Background="{DynamicResource AppBgBrush}"
+        Foreground="{DynamicResource TextBrush}"
+        TextOptions.TextFormattingMode="Ideal"
+        ResizeMode="CanResizeWithGrip">
+  <DockPanel Margin="10">
+    <TextBlock x:Name="StatusText" DockPanel.Dock="Top" Margin="0,0,0,8"
+               Text="{Binding Source={x:Static loc:TranslationSource.Instance}, Path=[librarypicker.loading]}" />
+
+    <StackPanel DockPanel.Dock="Top" Orientation="Horizontal" Margin="0,0,0,6">
+      <Button Content="{Binding Source={x:Static loc:TranslationSource.Instance}, Path=[librarypicker.selectAll]}"
+              Click="SelectAll_Click" Margin="0,0,6,0" Padding="6,2" />
+      <Button Content="{Binding Source={x:Static loc:TranslationSource.Instance}, Path=[librarypicker.selectNone]}"
+              Click="SelectNone_Click" Padding="6,2" />
+    </StackPanel>
+
+    <StackPanel DockPanel.Dock="Bottom" Orientation="Horizontal"
+                HorizontalAlignment="Right" Margin="0,8,0,0">
+      <Button Content="{Binding Source={x:Static loc:TranslationSource.Instance}, Path=[folderbrowser.cancel]}"
+              Width="80" Margin="0,0,8,0" IsCancel="True" Click="Cancel_Click" />
+      <Button x:Name="OkButton"
+              Content="{Binding Source={x:Static loc:TranslationSource.Instance}, Path=[folderbrowser.select]}"
+              Width="80" IsDefault="True" IsEnabled="False" Click="Ok_Click" />
+    </StackPanel>
+
+    <ScrollViewer VerticalScrollBarVisibility="Auto">
+      <ItemsControl x:Name="LibrariesList">
+        <ItemsControl.ItemTemplate>
+          <DataTemplate>
+            <CheckBox Content="{Binding Title}" IsChecked="{Binding IsSelected, Mode=TwoWay}"
+                      Margin="2,4" />
+          </DataTemplate>
+        </ItemsControl.ItemTemplate>
+      </ItemsControl>
+    </ScrollViewer>
+  </DockPanel>
+</Window>

SharepointToolbox/Views/Dialogs/LibraryPickerDialog.xaml.cs

@@ -0,0 +1,105 @@
+using System.Collections.ObjectModel;
+using System.ComponentModel;
+using System.Windows;
+using Microsoft.SharePoint.Client;
+using SharepointToolbox.Services;
+
+namespace SharepointToolbox.Views.Dialogs;
+
+public partial class LibraryPickerDialog : Window
+{
+    private readonly ClientContext _ctx;
+    private readonly IVersionCleanupService _libraryLister;
+    private readonly ObservableCollection<LibraryItem> _items = new();
+
+    public IReadOnlyList<string> SelectedLibraryTitles { get; private set; } = Array.Empty<string>();
+
+    public LibraryPickerDialog(
+        ClientContext ctx,
+        IVersionCleanupService libraryLister,
+        IReadOnlyCollection<string>? preselected = null)
+    {
+        InitializeComponent();
+        _ctx = ctx;
+        _libraryLister = libraryLister;
+        LibrariesList.ItemsSource = _items;
+        Loaded += async (_, _) => await LoadAsync(preselected ?? Array.Empty<string>());
+    }
+
+    private async Task LoadAsync(IReadOnlyCollection<string> preselected)
+    {
+        try
+        {
+            var titles = await _libraryLister.ListLibraryTitlesAsync(_ctx, CancellationToken.None);
+            var preset = new HashSet<string>(preselected, StringComparer.OrdinalIgnoreCase);
+            foreach (var t in titles)
+            {
+                var item = new LibraryItem { Title = t, IsSelected = preset.Contains(t) };
+                item.PropertyChanged += OnItemChanged;
+                _items.Add(item);
+            }
+            StatusText.Text = string.Format(
+                Localization.TranslationSource.Instance["librarypicker.loaded"],
+                _items.Count);
+            UpdateOkEnabled();
+        }
+        catch (Exception ex)
+        {
+            StatusText.Text = $"Error: {ex.Message}";
+        }
+    }
+
+    private void OnItemChanged(object? sender, PropertyChangedEventArgs e)
+    {
+        if (e.PropertyName == nameof(LibraryItem.IsSelected)) UpdateOkEnabled();
+    }
+
+    private void UpdateOkEnabled()
+        => OkButton.IsEnabled = _items.Any(i => i.IsSelected);
+
+    private void SelectAll_Click(object sender, RoutedEventArgs e)
+    {
+        foreach (var i in _items) i.IsSelected = true;
+    }
+
+    private void SelectNone_Click(object sender, RoutedEventArgs e)
+    {
+        foreach (var i in _items) i.IsSelected = false;
+    }
+
+    private void Ok_Click(object sender, RoutedEventArgs e)
+    {
+        SelectedLibraryTitles = _items.Where(i => i.IsSelected).Select(i => i.Title).ToList();
+        DialogResult = true;
+        Close();
+    }
+
+    private void Cancel_Click(object sender, RoutedEventArgs e)
+    {
+        DialogResult = false;
+        Close();
+    }
+
+    protected override void OnClosed(EventArgs e)
+    {
+        foreach (var i in _items) i.PropertyChanged -= OnItemChanged;
+        base.OnClosed(e);
+    }
+
+    public class LibraryItem : INotifyPropertyChanged
+    {
+        private bool _isSelected;
+        public string Title { get; init; } = string.Empty;
+        public bool IsSelected
+        {
+            get => _isSelected;
+            set
+            {
+                if (_isSelected == value) return;
+                _isSelected = value;
+                PropertyChanged?.Invoke(this, new PropertyChangedEventArgs(nameof(IsSelected)));
+            }
+        }
+        public event PropertyChangedEventHandler? PropertyChanged;
+    }
+}

SharepointToolbox/Views/Dialogs/ProfileManagementDialog.xaml

@@ -20,6 +20,7 @@
       <RowDefinition Height="Auto" />
       <RowDefinition Height="Auto" />
       <RowDefinition Height="Auto" />
+      <RowDefinition Height="Auto" />
     </Grid.RowDefinitions>
 
     <!-- Profile list -->
@@ -58,8 +59,31 @@
                  Text="{Binding Source={x:Static loc:TranslationSource.Instance}, Path=[profile.clientid.hint]}" />
     </Grid>
 
+    <!-- Profile CRUD buttons (placed under fields for natural flow) -->
+    <Grid Grid.Row="3" Margin="0,4,0,8">
+      <Grid.ColumnDefinitions>
+        <ColumnDefinition Width="*" />
+        <ColumnDefinition Width="Auto" />
+      </Grid.ColumnDefinitions>
+      <StackPanel Grid.Column="0" Orientation="Horizontal">
+        <Button Content="{Binding Source={x:Static loc:TranslationSource.Instance}, Path=[profile.add]}"
+                Command="{Binding AddCommand}"
+                MinWidth="90" Padding="10,4" Margin="0,0,6,0"
+                ToolTip="{Binding Source={x:Static loc:TranslationSource.Instance}, Path=[profile.add.tooltip]}" />
+        <Button Content="{Binding Source={x:Static loc:TranslationSource.Instance}, Path=[profile.save]}"
+                Command="{Binding SaveCommand}"
+                MinWidth="90" Padding="10,4"
+                ToolTip="{Binding Source={x:Static loc:TranslationSource.Instance}, Path=[profile.save.tooltip]}" />
+      </StackPanel>
+      <Button Grid.Column="1" Content="{Binding Source={x:Static loc:TranslationSource.Instance}, Path=[profile.delete]}"
+              Command="{Binding DeleteCommand}"
+              MinWidth="90" Padding="10,4"
+              Foreground="{DynamicResource DangerBrush}"
+              ToolTip="{Binding Source={x:Static loc:TranslationSource.Instance}, Path=[profile.delete.tooltip]}" />
+    </Grid>
+
     <!-- Client Logo -->
-    <StackPanel Grid.Row="3" Margin="0,8,0,8">
+    <StackPanel Grid.Row="4" Margin="0,8,0,8">
       <Label Content="{Binding Source={x:Static loc:TranslationSource.Instance}, Path=[profile.logo.title]}" Padding="0,0,0,4" />
       <Border BorderBrush="{DynamicResource BorderSoftBrush}" BorderThickness="1" Padding="8" CornerRadius="4"
               HorizontalAlignment="Left" MinWidth="200" MinHeight="50">
@@ -96,7 +120,7 @@
     </StackPanel>
 
     <!-- App Registration -->
-    <StackPanel Grid.Row="4" Margin="0,8,0,8">
+    <StackPanel Grid.Row="5" Margin="0,8,0,8">
       <Label Content="{Binding Source={x:Static loc:TranslationSource.Instance}, Path=[profile.fallback.title]}"
              FontWeight="SemiBold" Padding="0,0,0,4"
              Visibility="{Binding ShowFallbackInstructions, Converter={StaticResource BooleanToVisibilityConverter}}" />
@@ -134,16 +158,10 @@
       </Border>
     </StackPanel>
 
-    <!-- Buttons -->
+    <!-- Close button -->
-    <StackPanel Grid.Row="5" Orientation="Horizontal" HorizontalAlignment="Right">
+    <StackPanel Grid.Row="6" Orientation="Horizontal" HorizontalAlignment="Right" Margin="0,8,0,0">
-      <Button Content="{Binding Source={x:Static loc:TranslationSource.Instance}, Path=[profile.add]}"
-              Command="{Binding AddCommand}" Width="60" Margin="4,0" />
-      <Button Content="{Binding Source={x:Static loc:TranslationSource.Instance}, Path=[profile.save]}"
-              Command="{Binding SaveCommand}" MinWidth="80" Padding="6,0" Margin="4,0" />
-      <Button Content="{Binding Source={x:Static loc:TranslationSource.Instance}, Path=[profile.delete]}"
-              Command="{Binding DeleteCommand}" Width="60" Margin="4,0" />
       <Button Content="{Binding Source={x:Static loc:TranslationSource.Instance}, Path=[common.close]}"
-              Width="60" Margin="4,0"
+              MinWidth="80" Padding="10,4"
               Click="CloseButton_Click" IsCancel="True" />
     </StackPanel>
   </Grid>

SharepointToolbox/Views/Dialogs/ProfileManagementDialog.xaml.cs

@@ -9,6 +9,15 @@ public partial class ProfileManagementDialog : Window
     {
         InitializeComponent();
         DataContext = viewModel;
+        viewModel.ConfirmRegisterApp = msg =>
+        {
+            var result = MessageBox.Show(
+                this, msg,
+                Localization.TranslationSource.Instance["profile.register"],
+                MessageBoxButton.OKCancel,
+                MessageBoxImage.Information);
+            return result == MessageBoxResult.OK;
+        };
         Loaded += async (_, _) => await viewModel.LoadAsync();
     }
 

SharepointToolbox/Views/Tabs/VersionCleanupView.xaml

@@ -0,0 +1,118 @@
+<UserControl x:Class="SharepointToolbox.Views.Tabs.VersionCleanupView"
+             xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
+             xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
+             xmlns:loc="clr-namespace:SharepointToolbox.Localization">
+  <DockPanel LastChildFill="True">
+    <ScrollViewer DockPanel.Dock="Left" Width="280" VerticalScrollBarVisibility="Auto" Margin="8,8,4,8">
+      <StackPanel>
+        <GroupBox Header="{Binding Source={x:Static loc:TranslationSource.Instance}, Path=[versions.grp.libs]}"
+                  Margin="0,0,0,8">
+          <StackPanel Margin="4">
+            <TextBlock Text="{Binding SelectedLibrariesLabel}" Margin="0,0,0,6"
+                       Foreground="{DynamicResource TextMutedBrush}" />
+            <Button Content="{Binding Source={x:Static loc:TranslationSource.Instance}, Path=[versions.btn.pickLibs]}"
+                    Command="{Binding SelectLibrariesCommand}" Height="26" Margin="0,0,0,4" />
+            <Button Content="{Binding Source={x:Static loc:TranslationSource.Instance}, Path=[versions.btn.clearLibs]}"
+                    Command="{Binding ClearLibrariesCommand}" Height="26" />
+          </StackPanel>
+        </GroupBox>
+
+        <GroupBox Header="{Binding Source={x:Static loc:TranslationSource.Instance}, Path=[versions.grp.policy]}"
+                  Margin="0,0,0,8">
+          <StackPanel Margin="4">
+            <StackPanel Orientation="Horizontal" Margin="0,2">
+              <Label Content="{Binding Source={x:Static loc:TranslationSource.Instance}, Path=[versions.lbl.keepLast]}"
+                     VerticalAlignment="Center" Padding="0,0,4,0" />
+              <TextBox Text="{Binding KeepLast, UpdateSourceTrigger=PropertyChanged}"
+                       Width="50" Height="22" VerticalAlignment="Center" />
+            </StackPanel>
+            <CheckBox Content="{Binding Source={x:Static loc:TranslationSource.Instance}, Path=[versions.chk.keepFirst]}"
+                      IsChecked="{Binding KeepFirstVersion}" Margin="0,4,0,2" />
+            <CheckBox Content="{Binding Source={x:Static loc:TranslationSource.Instance}, Path=[versions.chk.confirm]}"
+                      IsChecked="{Binding ConfirmDelete}" Margin="0,4,0,2" />
+            <TextBlock Text="{Binding Source={x:Static loc:TranslationSource.Instance}, Path=[versions.note]}"
+                       TextWrapping="Wrap" FontSize="11" Foreground="{DynamicResource TextMutedBrush}"
+                       Margin="0,6,0,0" />
+          </StackPanel>
+        </GroupBox>
+
+        <Button Content="{Binding Source={x:Static loc:TranslationSource.Instance}, Path=[versions.btn.run]}"
+                Command="{Binding RunCommand}" Height="28" Margin="0,0,0,4" />
+        <Button Content="{Binding Source={x:Static loc:TranslationSource.Instance}, Path=[btn.cancel]}"
+                Command="{Binding CancelCommand}" Height="28" Margin="0,0,0,8" />
+
+        <Button Content="{Binding Source={x:Static loc:TranslationSource.Instance}, Path=[audit.btn.exportCsv]}"
+                Command="{Binding ExportCsvCommand}" Height="28" Margin="0,0,0,4" />
+
+        <TextBlock Text="{Binding StatusMessage}" TextWrapping="Wrap" FontSize="11"
+                   Foreground="{DynamicResource TextMutedBrush}" Margin="0,6" />
+      </StackPanel>
+    </ScrollViewer>
+
+    <Grid Margin="4,8,8,8">
+      <Grid.RowDefinitions>
+        <RowDefinition Height="Auto" />
+        <RowDefinition Height="*" />
+      </Grid.RowDefinitions>
+
+      <Border Grid.Row="0" Background="{DynamicResource AccentSoftBrush}" CornerRadius="4"
+              Padding="12,8" Margin="0,0,0,6">
+        <Border.Style>
+          <Style TargetType="Border">
+            <Setter Property="Visibility" Value="Collapsed" />
+            <Style.Triggers>
+              <DataTrigger Binding="{Binding HasResults}" Value="True">
+                <Setter Property="Visibility" Value="Visible" />
+              </DataTrigger>
+            </Style.Triggers>
+          </Style>
+        </Border.Style>
+        <StackPanel Orientation="Horizontal">
+          <StackPanel Orientation="Horizontal" Margin="0,0,24,0">
+            <TextBlock Text="{Binding Source={x:Static loc:TranslationSource.Instance}, Path=[versions.summary.files]}"
+                       FontWeight="SemiBold" />
+            <TextBlock Text="{Binding TotalFilesAffected, StringFormat=N0, Mode=OneWay}" Margin="4,0,0,0" />
+          </StackPanel>
+          <StackPanel Orientation="Horizontal" Margin="0,0,24,0">
+            <TextBlock Text="{Binding Source={x:Static loc:TranslationSource.Instance}, Path=[versions.summary.deleted]}"
+                       FontWeight="SemiBold" />
+            <TextBlock Text="{Binding TotalVersionsDeleted, StringFormat=N0, Mode=OneWay}" Margin="4,0,0,0" />
+          </StackPanel>
+          <StackPanel Orientation="Horizontal">
+            <TextBlock Text="{Binding Source={x:Static loc:TranslationSource.Instance}, Path=[versions.summary.freed]}"
+                       FontWeight="SemiBold" />
+            <TextBlock Text="{Binding TotalBytesFreed, Converter={StaticResource BytesConverter}, Mode=OneWay}"
+                       Margin="4,0,0,0" />
+          </StackPanel>
+        </StackPanel>
+      </Border>
+
+      <DataGrid Grid.Row="1" ItemsSource="{Binding Results}" IsReadOnly="True" AutoGenerateColumns="False"
+                VirtualizingPanel.IsVirtualizing="True"
+                ScrollViewer.HorizontalScrollBarVisibility="Auto">
+        <DataGrid.Columns>
+          <DataGridTextColumn Header="{Binding Source={x:Static loc:TranslationSource.Instance}, Path=[versions.col.library]}"
+                              Binding="{Binding Library}" Width="140" />
+          <DataGridTextColumn Header="{Binding Source={x:Static loc:TranslationSource.Instance}, Path=[versions.col.file]}"
+                              Binding="{Binding FileName}" Width="200" />
+          <DataGridTextColumn Header="{Binding Source={x:Static loc:TranslationSource.Instance}, Path=[versions.col.before]}"
+                              Binding="{Binding VersionsBefore, StringFormat=N0}" Width="80"
+                              ElementStyle="{StaticResource RightAlignStyle}" />
+          <DataGridTextColumn Header="{Binding Source={x:Static loc:TranslationSource.Instance}, Path=[versions.col.deleted]}"
+                              Binding="{Binding VersionsDeleted, StringFormat=N0}" Width="80"
+                              ElementStyle="{StaticResource RightAlignStyle}" />
+          <DataGridTextColumn Header="{Binding Source={x:Static loc:TranslationSource.Instance}, Path=[versions.col.remaining]}"
+                              Binding="{Binding VersionsRemaining, StringFormat=N0}" Width="90"
+                              ElementStyle="{StaticResource RightAlignStyle}" />
+          <DataGridTextColumn Header="{Binding Source={x:Static loc:TranslationSource.Instance}, Path=[versions.col.freed]}"
+                              Binding="{Binding BytesFreed, Converter={StaticResource BytesConverter}}" Width="100"
+                              ElementStyle="{StaticResource RightAlignStyle}" />
+          <DataGridTextColumn Header="{Binding Source={x:Static loc:TranslationSource.Instance}, Path=[versions.col.path]}"
+                              Binding="{Binding FileServerRelativeUrl}" Width="*" />
+          <DataGridTextColumn Header="{Binding Source={x:Static loc:TranslationSource.Instance}, Path=[versions.col.error]}"
+                              Binding="{Binding Error}" Width="160" />
+        </DataGrid.Columns>
+      </DataGrid>
+    </Grid>
+  </DockPanel>
+</UserControl>

SharepointToolbox/Views/Tabs/VersionCleanupView.xaml.cs

@@ -0,0 +1,54 @@
+using System.Windows;
+using System.Windows.Controls;
+using SharepointToolbox.Core.Models;
+using SharepointToolbox.Services;
+using SharepointToolbox.Views.Dialogs;
+
+namespace SharepointToolbox.Views.Tabs;
+
+public partial class VersionCleanupView : UserControl
+{
+    private readonly ViewModels.Tabs.VersionCleanupViewModel _viewModel;
+    private readonly ISessionManager _sessionManager;
+    private readonly IVersionCleanupService _versionService;
+
+    public VersionCleanupView(
+        ViewModels.Tabs.VersionCleanupViewModel viewModel,
+        ISessionManager sessionManager,
+        IVersionCleanupService versionService)
+    {
+        InitializeComponent();
+        _viewModel = viewModel;
+        _sessionManager = sessionManager;
+        _versionService = versionService;
+        DataContext = viewModel;
+
+        viewModel.PickLibrariesAsync = async (siteUrl, preselected) =>
+        {
+            if (viewModel.CurrentProfile == null) return null;
+            var profile = new TenantProfile
+            {
+                TenantUrl = siteUrl,
+                ClientId = viewModel.CurrentProfile.ClientId,
+                Name = viewModel.CurrentProfile.Name,
+            };
+            var ctx = await _sessionManager.GetOrCreateContextAsync(profile, CancellationToken.None);
+            var dlg = new LibraryPickerDialog(ctx, _versionService, preselected)
+            {
+                Owner = Window.GetWindow(this)
+            };
+            if (dlg.ShowDialog() != true) return null;
+            return dlg.SelectedLibraryTitles;
+        };
+
+        viewModel.ConfirmAction = msg =>
+        {
+            var result = MessageBox.Show(
+                Window.GetWindow(this), msg,
+                Localization.TranslationSource.Instance["versions.tab"],
+                MessageBoxButton.OKCancel,
+                MessageBoxImage.Warning);
+            return result == MessageBoxResult.OK;
+        };
+    }
+}