fix(save-attachments): marshal folder-tree mutations to the Dispatcher

v1.2.15's tree picker built the whole tree inside an async method and
mutated the TreeView-bound ObservableCollections after an await. In this
VSTO host the WPF SynchronizationContext is not installed, so
ConfigureAwait(true) resumed on a thread-pool thread and FolderTree.Add
threw "changes to its SourceCollection from a thread different from the
Dispatcher thread" — the exception was swallowed and the tree showed
empty (no folders selectable at all).

Capture the UI Dispatcher in the view-model and marshal every bound
collection mutation (FolderTree + each node's Children) through it, so
the tree populates regardless of which thread the network await resumes
on.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

.gitea/workflows/build.yml

@@ -258,15 +258,21 @@ jobs:
               & msbuild @msbuildArgs
               if ($LASTEXITCODE -ne 0) { throw "msbuild /t:Publish failed with $LASTEXITCODE" }
 
-              # Sanity check: did the VSTO publish target produce a .vsto file?
-              $vsto = Get-ChildItem -Recurse -Filter '*.vsto' -Path publish | Select-Object -First 1
-              if (-not $vsto) { throw "msbuild /t:Publish completed but no .vsto file found under publish/" }
+              # Sanity check + rename to canonical OutlookAddin.vsto so the URL
+              # matches PROVIDER_URL (hardcoded to .../OutlookAddin.vsto). Restrict
+              # to publish/ root -- there's a second .vsto inside Application Files
+              # that must keep its versioned name. Verify the renamed file exists
+              # before continuing; v1.2.11 shipped broken because a silent failure
+              # here left no OutlookAddin.vsto in the tar and 404'd the CDN.
+              $vsto = Get-ChildItem -File -Filter '*.vsto' -Path publish | Select-Object -First 1
+              if (-not $vsto) { throw "msbuild /t:Publish completed but no .vsto file found at publish/ root" }
               Write-Host "  produced $($vsto.FullName)"
-
-              # Rename to canonical OutlookAddin.vsto so the ClickOnce manifest
-              # URL matches PROVIDER_URL (which is hardcoded to .../OutlookAddin.vsto).
               if ($vsto.Name -ne 'OutlookAddin.vsto') {
-                  Rename-Item -LiteralPath $vsto.FullName -NewName 'OutlookAddin.vsto'
+                  Rename-Item -LiteralPath $vsto.FullName -NewName 'OutlookAddin.vsto' -ErrorAction Stop
+                  Write-Host "  renamed -> OutlookAddin.vsto"
+              }
+              if (-not (Test-Path 'publish/OutlookAddin.vsto')) {
+                  throw "post-rename: publish/OutlookAddin.vsto does not exist"
               }
 
               Write-Host "=== STEP F: stage protocol handler ==="

docs/AUTO-UPDATE-SETUP.md

@@ -315,16 +315,11 @@ git push origin v1.0.1
 ה-CI ירוץ אוטומטית כמו בשחרור הראשון.
 
 **אצל הלקוחות:**
-- ClickOnce בודק עדכון אוטומטית **כל 7 ימים** (הגדרה ב-csproj: `UpdateInterval=7`).
-- כדי **להאיץ** עדכון אצל לקוח מסויים:
-  1. סגור את Outlook לגמרי.
-  2. פתח את Outlook שוב.
-  3. אם עברו לפחות 7 ימים מבדיקת ה-update הקודמת — יבדוק עכשיו ויעדכן.
-  4. אם לא — אפשר לנקות את ה-ClickOnce cache:
-     ```powershell
-     rundll32.exe dfshim.dll,CleanOnlineAppCache
-     ```
-     ואז לפתוח שוב את `https://platform.dev.marcus-law.co.il/outlook-addin/OutlookAddin.vsto`.
+- ה־VSTO runtime בודק את ה-`.vsto` manifest **בכל פתיחה של Outlook** (משוחזר מ-`<UpdatePeriodically>false</UpdatePeriodically>` ב-csproj החל מ-v1.2.9; קודם זה היה פעם ב-7 ימים). הבדיקה היא GET של ~6KB, ~100ms — בלתי מורגש בזמן הטעינה.
+- ה-CI מציב `/p:MinimumRequiredVersion=<tag>` בכל build, אז מיד כשהבדיקה מזהה גרסה חדשה — ההתקנה נכפית בלי דיאלוג.
+- **תרגום מעשי**: 30 שניות אחרי `git push --tags` ה-CI מסיים → תוך 2-3 דקות החבילה נדחפת ל-CDN → בכניסה הבאה של כל אחד מהלקוחות ל-Outlook הוא רץ על הגרסה החדשה. **בלי שום פעולה ידנית מצידם**.
+- **הכפתור "בדוק עדכונים" בהגדרות** רק מודיע ("זמינה גרסה X — סגור ופתח Outlook"). הוא לא יכול להתקין מתוך תהליך Outlook רץ — `VSTOInstaller.exe` לא יכול לדרוס DLLs נעולים, וה-ApplicationDeployment API נכשל ב-`TrustNotGrantedException` בהקשר VSTO. ההתקנה תמיד קורית רק דרך ה-runtime בעלייה של Outlook. [פירוט בזיכרון: feedback_vsto_updater_api.md]
+- **תקלה נדירה — לקוח שהותקן ידנית עם dev cert** (`HP-OFFICE1\<user>`, publicKeyToken `41d8d795775ea8cb`) לא יכול לעבור auto-update לגרסת prod cert (`Marcus-Law OutlookAddin`, publicKeyToken `c68d2b4c25051c5b`) — ClickOnce מתייחס אליהן כשתי אפליקציות שונות. **פעם אחת**: Apps & Features → uninstall של MarcusLaw.OutlookAddin → התקנה חדשה מ-`https://platform.dev.marcus-law.co.il/outlook-addin/OutlookAddin.vsto`. אחרי זה auto-update עובד.
 
 ---
 

docs/PROJECT-BRIEFING.md

@@ -284,7 +284,7 @@ If the session is on the Linux dev server (`/home/chaim/espocrm-extensions/Outlo
    - Uploads `publish.tar.gz` to Gitea generic registry (`outlook-addin-publish/<version>/publish.tar.gz`)
    - Linux job downloads the tar.gz, builds a Docker image `outlook-addin-cdn:latest`, pushes to Gitea registry, calls Coolify to redeploy the CDN container
    - Posts to Mattermost channel `git-verelasim` with the install URL on success / a failure link on failure
-5. Lawyers' installed Add-in checks the deployment manifest at the install URL every 7 days (configured in csproj `<UpdateInterval>7</UpdateInterval>`) or whenever they click "בדוק עדכונים" in Settings → אודות.
+5. Lawyers' installed Add-in checks the deployment manifest at the install URL **on every Outlook startup** (csproj has `<UpdatePeriodically>false</UpdatePeriodically>` since v1.2.9 — earlier versions waited up to 7 days). The check is a single ~6 KB HTTP GET, ~100 ms. Combined with the CI setting `/p:MinimumRequiredVersion=<tag>` per build, this means every tagged release lands on every lawyer's PC the next time they open Outlook, silently and without prompts.
 
 **Semver policy:** PATCH for bug fixes (unilateral), MINOR for visible features (unilateral when warranted), MAJOR only with Chaim's explicit approval.
 

src/OutlookAddin.Core/Services/EspoCrmClient.cs

@@ -213,13 +213,29 @@ namespace MarcusLaw.OutlookAddin.Core.Services
             // is sent in the "file" field as a data-URI. The previous extra
             // "contents" alias was an undocumented legacy that strict tenants
             // reject with 400.
+            //
+            // We bind the upload to Note.attachments (parentType=Note,
+            // field=attachments). EspoCRM's attachment access checker now
+            // REJECTS a role=Attachment upload that carries neither `field`
+            // nor `parentType` ("No `field` and `parentType`." → 400) — the
+            // earlier "unbound blob" shape no longer passes. Note.attachments
+            // is the documented Attachment-Multiple example and a built-in
+            // field that carries NO "allowed file types" restriction, so every
+            // file type (PDF, JPEG, PNG, …) passes — unlike Document.file,
+            // which Marcus-Law limits to PDF/Word and which rejected images
+            // with 403 "Not allowed file type".
+            //
+            // We never set parentId / create a Note: the attachment stays a
+            // standalone blob whose id we immediately push to the network
+            // share. The (parentType, field) pair only satisfies the access
+            // checker and selects an unrestricted file-type policy.
             var payload = new Dictionary<string, object?>
             {
                 ["name"] = fileName,
                 ["type"] = mime,
                 ["role"] = "Attachment",
-                ["relatedType"] = "Document",
-                ["field"] = "file",
+                ["parentType"] = "Note",
+                ["field"] = "attachments",
                 ["file"] = dataUri
             };
 

src/OutlookAddin.UI/Dialogs/ComposeFromCaseDialog.xaml

@@ -1,9 +1,10 @@
 <Window x:Class="MarcusLaw.OutlookAddin.UI.Dialogs.ComposeFromCaseDialog"
         xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
         xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
+        xmlns:conv="clr-namespace:MarcusLaw.OutlookAddin.UI.Converters"
         Title="כתוב מייל מתיק"
-        Height="480" Width="600"
-        MinHeight="320" MinWidth="500"
+        Height="520" Width="680"
+        MinHeight="360" MinWidth="540"
         FlowDirection="RightToLeft"
         WindowStartupLocation="CenterOwner"
         ShowInTaskbar="False"
@@ -11,6 +12,7 @@
         Background="#F8FAFC"
         FontFamily="Segoe UI, David, Frank Ruehl, Arial">
     <Window.Resources>
+        <conv:CaseStatusToHebrewConverter x:Key="CaseStatusHe" />
         <SolidColorBrush x:Key="Primary"      Color="#2563EB" />
         <SolidColorBrush x:Key="PrimaryHover" Color="#1D4ED8" />
         <SolidColorBrush x:Key="Border"       Color="#E2E8F0" />
@@ -134,24 +136,30 @@
         </Border>
 
         <Border Grid.Row="1" Style="{StaticResource Card}">
-            <ListBox ItemsSource="{Binding Cases}"
-                     SelectedItem="{Binding SelectedCase}"
-                     BorderThickness="0"
-                     Background="Transparent"
-                     ItemContainerStyle="{StaticResource ResultItem}"
-                     Padding="4">
-                <ListBox.ItemTemplate>
-                    <DataTemplate>
-                        <StackPanel>
-                            <TextBlock FontSize="13">
-                                <Run Text="[" /><Run Text="{Binding Number, Mode=OneWay}" /><Run Text="] " />
-                                <Run Text="{Binding Name, Mode=OneWay}" FontWeight="SemiBold" />
-                            </TextBlock>
-                            <TextBlock Text="{Binding Status}" Foreground="{StaticResource Muted}" FontSize="11" />
-                        </StackPanel>
-                    </DataTemplate>
-                </ListBox.ItemTemplate>
-            </ListBox>
+            <DataGrid ItemsSource="{Binding Cases}"
+                      SelectedItem="{Binding SelectedCase}"
+                      AutoGenerateColumns="False"
+                      HeadersVisibility="Column"
+                      GridLinesVisibility="Horizontal"
+                      HorizontalGridLinesBrush="#E2E8F0"
+                      RowBackground="White"
+                      AlternatingRowBackground="#F8FAFC"
+                      BorderThickness="0"
+                      CanUserAddRows="False"
+                      CanUserDeleteRows="False"
+                      CanUserResizeRows="False"
+                      CanUserReorderColumns="False"
+                      SelectionMode="Single"
+                      SelectionUnit="FullRow"
+                      IsReadOnly="True"
+                      RowHeight="30">
+                <DataGrid.Columns>
+                    <DataGridTextColumn Header="מס׳ תיק" Binding="{Binding Number}" Width="80" />
+                    <DataGridTextColumn Header="שם" Binding="{Binding Name}" Width="*" />
+                    <DataGridTextColumn Header="מס׳ בבית משפט" Binding="{Binding CourtCaseNumber}" Width="140" />
+                    <DataGridTextColumn Header="סטטוס" Binding="{Binding Status, Converter={StaticResource CaseStatusHe}}" Width="110" />
+                </DataGrid.Columns>
+            </DataGrid>
         </Border>
 
         <TextBlock Grid.Row="2" Text="{Binding StatusMessage}"

src/OutlookAddin.UI/Dialogs/SaveAttachmentsDialog.xaml

@@ -3,8 +3,8 @@
         xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
         xmlns:conv="clr-namespace:MarcusLaw.OutlookAddin.UI.Converters"
         Title="שמור קבצים מצורפים ל-Klear"
-        Height="560" Width="620"
-        MinHeight="420" MinWidth="500"
+        Height="640" Width="620"
+        MinHeight="480" MinWidth="500"
         FlowDirection="RightToLeft"
         WindowStartupLocation="CenterOwner"
         ShowInTaskbar="False"
@@ -144,24 +144,38 @@
 
         <!-- Folder -->
         <DockPanel Grid.Row="2" Margin="0,10,0,0" LastChildFill="True">
-            <TextBlock DockPanel.Dock="Left" Text="תיקייה:" VerticalAlignment="Center"
-                       Margin="0,0,8,0" Foreground="{StaticResource Muted}" FontSize="12" />
-            <TextBlock DockPanel.Dock="Right" Text="טוען…" VerticalAlignment="Center"
-                       Margin="8,0,0,0" Foreground="{StaticResource Muted}" FontSize="12"
-                       Visibility="{Binding IsLoadingSubfolders, Converter={StaticResource BoolToVis}}" />
-            <ComboBox ItemsSource="{Binding Subfolders}"
-                      SelectedItem="{Binding SelectedSubfolder}"
-                      Padding="6,4">
-                <ComboBox.Style>
-                    <Style TargetType="ComboBox">
-                        <Style.Triggers>
-                            <DataTrigger Binding="{Binding IsLoadingSubfolders}" Value="True">
-                                <Setter Property="IsEnabled" Value="False" />
-                            </DataTrigger>
-                        </Style.Triggers>
-                    </Style>
-                </ComboBox.Style>
-            </ComboBox>
+            <DockPanel DockPanel.Dock="Top" LastChildFill="True" Margin="0,0,0,4">
+                <TextBlock DockPanel.Dock="Left" Text="תיקיית יעד:" VerticalAlignment="Center"
+                           Margin="0,0,8,0" Foreground="{StaticResource Muted}" FontSize="12" />
+                <TextBlock DockPanel.Dock="Right" Text="טוען…" VerticalAlignment="Center"
+                           Margin="8,0,0,0" Foreground="{StaticResource Muted}" FontSize="12"
+                           Visibility="{Binding IsLoadingSubfolders, Converter={StaticResource BoolToVis}}" />
+                <TextBlock Text="בחר/י תיקייה או תת-תיקייה לשמירה (ניתן להרחיב רמות)"
+                           VerticalAlignment="Center" Foreground="{StaticResource Muted}" FontSize="11"
+                           TextTrimming="CharacterEllipsis" />
+            </DockPanel>
+            <Border Style="{StaticResource Card}" MaxHeight="150">
+                <TreeView x:Name="FolderTreeView"
+                          ItemsSource="{Binding FolderTree}"
+                          BorderThickness="0"
+                          Background="Transparent"
+                          SelectedItemChanged="FolderTreeView_SelectedItemChanged">
+                    <TreeView.ItemContainerStyle>
+                        <Style TargetType="TreeViewItem">
+                            <Setter Property="IsExpanded" Value="{Binding IsExpanded, Mode=TwoWay}" />
+                            <Setter Property="IsSelected" Value="{Binding IsSelected, Mode=TwoWay}" />
+                        </Style>
+                    </TreeView.ItemContainerStyle>
+                    <TreeView.ItemTemplate>
+                        <HierarchicalDataTemplate ItemsSource="{Binding Children}">
+                            <StackPanel Orientation="Horizontal" Margin="0,1">
+                                <TextBlock Text="📁" Margin="0,0,4,0" FontSize="13" VerticalAlignment="Center" />
+                                <TextBlock Text="{Binding Name}" VerticalAlignment="Center" FontSize="13" />
+                            </StackPanel>
+                        </HierarchicalDataTemplate>
+                    </TreeView.ItemTemplate>
+                </TreeView>
+            </Border>
         </DockPanel>
 
         <!-- Attachments header -->

src/OutlookAddin.UI/Dialogs/SaveAttachmentsDialog.xaml.cs

@@ -32,5 +32,15 @@ namespace MarcusLaw.OutlookAddin.UI.Dialogs
             DialogResult = _viewModel?.DialogResult;
             Close();
         }
+
+        // WPF's TreeView.SelectedItem is read-only, so we mirror the selection
+        // into the view-model here (the chosen node drives the save target).
+        private void FolderTreeView_SelectedItemChanged(object sender, RoutedPropertyChangedEventArgs<object> e)
+        {
+            if (_viewModel != null)
+            {
+                _viewModel.SelectedFolder = e.NewValue as FolderNodeViewModel;
+            }
+        }
     }
 }

src/OutlookAddin.UI/ViewModels/ComposeFromCaseViewModel.cs

@@ -1,4 +1,5 @@
 using System;
+using System.Collections.Generic;
 using System.Collections.ObjectModel;
 using System.Threading;
 using System.Threading.Tasks;
@@ -74,20 +75,36 @@ namespace MarcusLaw.OutlookAddin.UI.ViewModels
                 ct.ThrowIfCancellationRequested();
 
                 Cases.Clear();
-                int kept = 0;
+                var caseHits = new List<EspoEntityRef>();
                 foreach (var hit in search.List)
                 {
-                    if (!string.Equals(hit.EntityType, "Case", StringComparison.OrdinalIgnoreCase)) continue;
-                    Cases.Add(new CaseEntity
-                    {
-                        Id = hit.Id,
-                        Name = hit.Name,
-                    });
-                    kept++;
+                    if (string.Equals(hit.EntityType, "Case", StringComparison.OrdinalIgnoreCase))
+                        caseHits.Add(hit);
                 }
-                StatusMessage = kept == 0
-                    ? "אין תוצאות מסוג תיק (Case)"
-                    : $"נמצאו {kept} תיקים";
+
+                if (caseHits.Count == 0)
+                {
+                    StatusMessage = "אין תוצאות מסוג תיק (Case)";
+                    return;
+                }
+
+                // GlobalSearch only returns id+name. Hydrate each hit with
+                // number+status (and the Hebrew case name when present) so the
+                // picker shows the same columns the file-attachments picker
+                // does.
+                var detailTasks = new List<Task<CaseEntity?>>(caseHits.Count);
+                foreach (var hit in caseHits)
+                {
+                    detailTasks.Add(LoadCaseRowAsync(hit, ct));
+                }
+                var details = await Task.WhenAll(detailTasks).ConfigureAwait(true);
+                ct.ThrowIfCancellationRequested();
+
+                foreach (var row in details)
+                {
+                    if (row != null) Cases.Add(row);
+                }
+                StatusMessage = $"נמצאו {Cases.Count} תיקים";
             }
             catch (OperationCanceledException) { /* superseded */ }
             catch (EspoCrmAuthorizationException)
@@ -101,6 +118,27 @@ namespace MarcusLaw.OutlookAddin.UI.ViewModels
             }
         }
 
+        private async Task<CaseEntity?> LoadCaseRowAsync(EspoEntityRef hit, CancellationToken ct)
+        {
+            var row = new CaseEntity { Id = hit.Id, Name = hit.Name };
+            if (string.IsNullOrEmpty(hit.Id)) return row;
+            try
+            {
+                var detail = await _client.GetCaseAsync(
+                    hit.Id, "id,name,number,status,cCourtCaseNumber", ct).ConfigureAwait(false);
+                row.Number = detail.Number;
+                row.Status = detail.Status;
+                row.CourtCaseNumber = detail.CourtCaseNumber;
+                if (!string.IsNullOrEmpty(detail.Name)) row.Name = detail.Name;
+            }
+            catch (OperationCanceledException) { throw; }
+            catch (Exception ex)
+            {
+                _logger.Warning(ex, "ComposeFromCase: hydrating case {CaseId} failed", hit.Id);
+            }
+            return row;
+        }
+
         [RelayCommand(CanExecute = nameof(CanSubmit))]
         private void Submit()
         {

src/OutlookAddin.UI/ViewModels/FolderNodeViewModel.cs

@@ -0,0 +1,168 @@
+using System;
+using System.Collections.Generic;
+using System.Collections.ObjectModel;
+using System.Threading.Tasks;
+using System.Windows.Threading;
+using CommunityToolkit.Mvvm.ComponentModel;
+using MarcusLaw.OutlookAddin.Core.Services;
+using Serilog;
+
+namespace MarcusLaw.OutlookAddin.UI.ViewModels
+{
+    /// <summary>
+    /// One node in the network-storage folder tree shown by the
+    /// save-attachments dialog. Children are listed lazily the first time the
+    /// node is expanded, so the user can drill into nested subfolders to any
+    /// depth without us listing the whole tree up front.
+    /// </summary>
+    public sealed partial class FolderNodeViewModel : ObservableObject
+    {
+        private readonly IEspoCrmClient? _client;
+        private readonly ILogger? _logger;
+        private readonly Dispatcher? _dispatcher;
+        private bool _childrenLoaded;
+        private bool _loadingStarted;
+
+        /// <summary>Label shown in the tree.</summary>
+        public string Name { get; }
+
+        /// <summary>
+        /// Path relative to the share root (e.g. "56-ליאור זייני/מסמכים").
+        /// Used to list this folder's children. Empty for placeholders.
+        /// </summary>
+        public string FullPath { get; }
+
+        /// <summary>
+        /// Path relative to the case-root folder (e.g. "מסמכים/רפואי"), or
+        /// null for the case-root node itself. This is what the save target
+        /// appends to the resolved case folder.
+        /// </summary>
+        public string? RelativePath { get; }
+
+        /// <summary>True for the transient "loading…" child placeholder.</summary>
+        public bool IsPlaceholder { get; }
+
+        public bool IsRoot => !IsPlaceholder && RelativePath == null;
+
+        public ObservableCollection<FolderNodeViewModel> Children { get; } =
+            new ObservableCollection<FolderNodeViewModel>();
+
+        [ObservableProperty]
+        private bool isExpanded;
+
+        [ObservableProperty]
+        private bool isSelected;
+
+        [ObservableProperty]
+        private bool isLoading;
+
+        /// <summary>Real folder node.</summary>
+        public FolderNodeViewModel(
+            IEspoCrmClient client,
+            ILogger logger,
+            Dispatcher dispatcher,
+            string name,
+            string fullPath,
+            string? relativePath)
+        {
+            _client = client ?? throw new ArgumentNullException(nameof(client));
+            _logger = logger ?? throw new ArgumentNullException(nameof(logger));
+            _dispatcher = dispatcher ?? throw new ArgumentNullException(nameof(dispatcher));
+            Name = name;
+            FullPath = fullPath;
+            RelativePath = relativePath;
+            // A placeholder child makes the expand chevron appear before we've
+            // listed; expanding swaps it for the real children (or, if there
+            // are none, the node becomes a leaf).
+            Children.Add(new FolderNodeViewModel());
+        }
+
+        /// <summary>Placeholder ("loading…") node constructor.</summary>
+        private FolderNodeViewModel()
+        {
+            Name = "טוען…";
+            FullPath = string.Empty;
+            RelativePath = string.Empty;
+            IsPlaceholder = true;
+            _childrenLoaded = true;
+        }
+
+        partial void OnIsExpandedChanged(bool value)
+        {
+            if (value && !_childrenLoaded && !_loadingStarted)
+            {
+                _loadingStarted = true;
+                _ = LoadChildrenAsync();
+            }
+        }
+
+        /// <summary>
+        /// Lists this folder's subfolders and replaces the placeholder with
+        /// real child nodes. <paramref name="seedNames"/> (used for the root)
+        /// guarantees the default case subfolders show even if the share
+        /// listing lags or omits a not-yet-created folder.
+        /// </summary>
+        public async Task LoadChildrenAsync(IEnumerable<string>? seedNames = null)
+        {
+            if (_client == null) return;
+            IsLoading = true;
+
+            // Build into a local list and swap once at the end. The seeds are
+            // added first so that even if the share listing fails the default
+            // subfolders still show; on failure for a non-seeded node the list
+            // is empty and the node reads as a leaf rather than "loading…".
+            var seen = new HashSet<string>(StringComparer.Ordinal);
+            var loaded = new List<FolderNodeViewModel>();
+            if (seedNames != null)
+            {
+                foreach (var n in seedNames)
+                {
+                    if (seen.Add(n)) loaded.Add(MakeChild(n));
+                }
+            }
+
+            try
+            {
+                var items = await _client.ListNetworkStorageFolderAsync(FullPath).ConfigureAwait(true);
+                foreach (var item in items)
+                {
+                    if (!item.IsFolder) continue;
+                    if (!seen.Add(item.Name)) continue;
+                    loaded.Add(MakeChild(item.Name));
+                }
+            }
+            catch (Exception ex)
+            {
+                _logger?.Warning(ex, "Listing subfolders under '{Path}' failed", FullPath);
+            }
+            finally
+            {
+                // Marshal onto the Dispatcher: once this node's TreeViewItem
+                // exists, Children is bound and must only be mutated on the UI
+                // thread (the network await above can resume on a thread-pool
+                // thread in this VSTO host).
+                OnUi(() =>
+                {
+                    Children.Clear();
+                    foreach (var child in loaded) Children.Add(child);
+                });
+                _childrenLoaded = true;
+                IsLoading = false;
+            }
+        }
+
+        private FolderNodeViewModel MakeChild(string name)
+        {
+            var fullPath = string.IsNullOrEmpty(FullPath) ? name : FullPath + "/" + name;
+            var relativePath = IsRoot ? name : RelativePath + "/" + name;
+            return new FolderNodeViewModel(_client!, _logger!, _dispatcher!, name, fullPath, relativePath);
+        }
+
+        private void OnUi(Action action)
+        {
+            var d = _dispatcher;
+            if (d == null || d.CheckAccess()) action();
+            else d.Invoke(action);
+        }
+    }
+}

src/OutlookAddin.UI/ViewModels/SaveAttachmentsViewModel.cs

@@ -3,6 +3,7 @@ using System.Collections.Generic;
 using System.Collections.ObjectModel;
 using System.Threading;
 using System.Threading.Tasks;
+using System.Windows.Threading;
 using CommunityToolkit.Mvvm.ComponentModel;
 using CommunityToolkit.Mvvm.Input;
 using MarcusLaw.OutlookAddin.Core.Models;
@@ -31,6 +32,7 @@ namespace MarcusLaw.OutlookAddin.UI.ViewModels
 
         private readonly IEspoCrmClient _client;
         private readonly ILogger _logger;
+        private readonly Dispatcher _dispatcher;
         private CancellationTokenSource? _searchCts;
 
         [ObservableProperty]
@@ -40,7 +42,7 @@ namespace MarcusLaw.OutlookAddin.UI.ViewModels
         private CaseEntity? selectedCase;
 
         [ObservableProperty]
-        private string? selectedSubfolder;
+        private FolderNodeViewModel? selectedFolder;
 
         [ObservableProperty]
         private string? statusMessage;
@@ -58,7 +60,12 @@ namespace MarcusLaw.OutlookAddin.UI.ViewModels
 
         public ObservableCollection<CaseEntity> Cases { get; } = new ObservableCollection<CaseEntity>();
 
-        public ObservableCollection<string> Subfolders { get; } = new ObservableCollection<string>();
+        /// <summary>
+        /// Folder tree for the selected case. Holds a single root node (the
+        /// case folder); its children are the subfolders, loaded lazily so the
+        /// user can drill into any nesting depth.
+        /// </summary>
+        public ObservableCollection<FolderNodeViewModel> FolderTree { get; } = new ObservableCollection<FolderNodeViewModel>();
 
         public ObservableCollection<AttachmentRowViewModel> Attachments { get; } = new ObservableCollection<AttachmentRowViewModel>();
 
@@ -78,14 +85,20 @@ namespace MarcusLaw.OutlookAddin.UI.ViewModels
         }
 
         /// <summary>
-        /// Subfolder string the user picked, or null to save to the case
-        /// folder root.
+        /// Folder the user picked, as a path relative to the case folder
+        /// (e.g. "מסמכים/רפואי"), or null to save to the case folder root.
+        /// Multi-segment paths are honoured by the save target, which appends
+        /// this to <see cref="ResolvedCaseFolderPath"/>.
         /// </summary>
-        public string? ChosenSubfolderName =>
-            string.IsNullOrEmpty(SelectedSubfolder) ||
-            string.Equals(SelectedSubfolder, RootSentinel, StringComparison.Ordinal)
-                ? null
-                : SelectedSubfolder;
+        public string? ChosenSubfolderName
+        {
+            get
+            {
+                var f = SelectedFolder;
+                if (f == null || f.IsPlaceholder || f.IsRoot) return null;
+                return string.IsNullOrEmpty(f.RelativePath) ? null : f.RelativePath;
+            }
+        }
 
         public CaseEntity? PickedCase => SelectedCase;
 
@@ -98,8 +111,15 @@ namespace MarcusLaw.OutlookAddin.UI.ViewModels
         {
             _client = client ?? throw new ArgumentNullException(nameof(client));
             _logger = logger ?? throw new ArgumentNullException(nameof(logger));
+            // Captured on the UI thread (the VM is constructed on the thread
+            // that shows the dialog). Used to marshal ObservableCollection
+            // mutations back onto the Dispatcher — in this VSTO host the WPF
+            // SynchronizationContext is not installed, so ConfigureAwait(true)
+            // resumes on a thread-pool thread and a bound-collection Add throws
+            // "changes ... from a thread different from the Dispatcher thread".
+            _dispatcher = Dispatcher.CurrentDispatcher;
 
-            ResetSubfolders();
+            ResetFolderTree();
 
             foreach (var att in attachments)
             {
@@ -107,12 +127,52 @@ namespace MarcusLaw.OutlookAddin.UI.ViewModels
             }
         }
 
-        private void ResetSubfolders()
+        /// <summary>
+        /// Seeds the case list with the cases already resolved for the mail's
+        /// sender (from the sidebar match) so the user doesn't have to search
+        /// for a client we've already identified. When exactly one case is
+        /// known we auto-select it (which kicks the subfolder/folder-path
+        /// resolve); with several we just show them and let the user pick.
+        /// The user can still type in the search box to override — that
+        /// repopulates <see cref="Cases"/> from a fresh server search.
+        /// </summary>
+        public void PreselectCases(IReadOnlyList<CaseEntity> cases)
         {
-            Subfolders.Clear();
-            Subfolders.Add(RootSentinel);
-            foreach (var f in DefaultCaseSubfolders) Subfolders.Add(f);
-            SelectedSubfolder = Subfolders[0];
+            if (cases == null || cases.Count == 0) return;
+
+            Cases.Clear();
+            foreach (var c in cases)
+            {
+                if (c == null || string.IsNullOrEmpty(c.Id)) continue;
+                Cases.Add(c);
+            }
+            if (Cases.Count == 0) return;
+
+            if (Cases.Count == 1)
+            {
+                SelectedCase = Cases[0];
+                StatusMessage = "התיק זוהה אוטומטית מהשולח";
+            }
+            else
+            {
+                StatusMessage = $"{Cases.Count} תיקים מקושרים לשולח — בחר/י תיק";
+            }
+        }
+
+        /// <summary>Runs <paramref name="action"/> on the UI/Dispatcher thread.</summary>
+        private void OnUi(Action action)
+        {
+            if (_dispatcher.CheckAccess()) action();
+            else _dispatcher.Invoke(action);
+        }
+
+        private void ResetFolderTree()
+        {
+            OnUi(() =>
+            {
+                FolderTree.Clear();
+                SelectedFolder = null;
+            });
         }
 
         partial void OnSearchTextChanged(string value)
@@ -137,7 +197,7 @@ namespace MarcusLaw.OutlookAddin.UI.ViewModels
         /// </summary>
         public async Task RefreshSubfoldersForSelectedCaseAsync()
         {
-            ResetSubfolders();
+            ResetFolderTree();
             ResolvedCaseFolderPath = null;
 
             var c = SelectedCase;
@@ -188,21 +248,28 @@ namespace MarcusLaw.OutlookAddin.UI.ViewModels
                 c.Id, c.Number ?? "(none)", primaryContactName ?? "(none)", c.NetworkStorageFolderPath ?? "(none)", folderPath);
             if (string.IsNullOrEmpty(folderPath)) return;
 
+            // Build the tree rooted at the case folder. The root node is
+            // selected by default (→ save to case root, matching the previous
+            // default), expanded, and seeded with the default subfolders so
+            // they appear even before the share listing returns. Deeper levels
+            // load lazily as the user expands them.
+            var root = new FolderNodeViewModel(_client, _logger, _dispatcher, RootSentinel, folderPath, relativePath: null);
+            OnUi(() =>
+            {
+                FolderTree.Add(root);
+                SelectedFolder = root;
+                root.IsSelected = true;
+            });
+
             try
             {
-                var items = await _client.ListNetworkStorageFolderAsync(folderPath).ConfigureAwait(true);
-                foreach (var item in items)
-                {
-                    if (!item.IsFolder) continue;
-                    if (Subfolders.Contains(item.Name)) continue;
-                    if (string.Equals(item.Name, RootSentinel, StringComparison.Ordinal)) continue;
-                    Subfolders.Add(item.Name);
-                }
+                await root.LoadChildrenAsync(DefaultCaseSubfolders).ConfigureAwait(true);
             }
             catch (Exception ex)
             {
                 _logger.Warning(ex, "Listing subfolders for case {CaseId} failed", c.Id);
             }
+            OnUi(() => root.IsExpanded = true);
         }
 
         /// <summary>

src/OutlookAddin.UI/ViewModels/SettingsViewModel.cs

@@ -214,25 +214,25 @@ namespace MarcusLaw.OutlookAddin.UI.ViewModels
                     return;
                 }
 
-                // VSTO add-ins cannot be updated programmatically from inside
-                // a running Outlook — ApplicationDeployment.Update() throws.
-                // Open the .vsto URL via the shell; Windows hands it to
-                // VSTOInstaller.exe which installs the update correctly.
-                try
-                {
-                    System.Diagnostics.Process.Start(new System.Diagnostics.ProcessStartInfo(manifestUri.ToString())
-                    {
-                        UseShellExecute = true
-                    });
-                    UpdateStatusBrush = SuccessBrush;
-                    UpdateStatus = $"זמינה גרסה {availableVersion} — אשר את ההתקנה בחלון שנפתח, ואז סגור ופתח את Outlook.";
-                }
-                catch (Exception launchEx)
-                {
-                    _logger.Warning(launchEx, "CheckForUpdate: shell launch of installer URL failed");
-                    UpdateStatusBrush = ErrorBrush;
-                    UpdateStatus = $"זמינה גרסה {availableVersion} אבל לא הצלחנו לפתוח את חלון ההתקנה. גש ידנית ל-{manifestUri}";
-                }
+                // A running Outlook holds file locks on the loaded add-in
+                // DLLs. Neither ApplicationDeployment.Update (TrustNotGranted)
+                // nor a direct VSTOInstaller.exe /I call (0x8007007E
+                // ERROR_MOD_NOT_FOUND) nor Process.Start(.vsto URL) (Chrome
+                // downloads to local-machine zone — InvalidDeploymentException)
+                // can install over those locks. The only path that actually
+                // works is the one VSTO runtime takes automatically on Outlook
+                // startup: it checks the manifest URL before loading the
+                // add-in, downloads + installs if there's a newer version,
+                // then loads it.
+                //
+                // So the button's job is just to tell the user: "close and
+                // reopen Outlook." That's the same flow the user has been
+                // doing manually all along; we're just confirming the new
+                // version is there waiting.
+                UpdateStatusBrush = SuccessBrush;
+                UpdateStatus =
+                    $"זמינה גרסה {availableVersion}. סגור ופתח את Outlook — " +
+                    "הגרסה החדשה תותקן אוטומטית בעלייה.";
                 return;
             }
             catch (System.Deployment.Application.DeploymentDownloadException ex)

src/OutlookAddin/OutlookAddin.csproj

@@ -36,11 +36,10 @@
     <PublishUrl>C:\Users\Chaim\source\repos\OutlookAddin\Publish\</PublishUrl>
     <InstallUrl>https://gitea.dev.marcus-law.co.il/espocrm-extensions/OutlookAddin/raw/branch/main/Publish/</InstallUrl>
     <TargetCulture>en</TargetCulture>
-    <ApplicationVersion>1.2.4.0</ApplicationVersion>
+    <ApplicationVersion>1.2.10.0</ApplicationVersion>
     <AutoIncrementApplicationRevision>false</AutoIncrementApplicationRevision>
     <UpdateEnabled>true</UpdateEnabled>
-    <UpdateInterval>7</UpdateInterval>
-    <UpdateIntervalUnits>days</UpdateIntervalUnits>
+    <UpdatePeriodically>false</UpdatePeriodically>
     <ProductName>MarcusLaw.OutlookAddin</ProductName>
     <PublisherName />
     <SupportUrl />
@@ -258,6 +257,9 @@
     <EmbeddedResource Include="Ribbon\InspectorRibbon.xml">
       <LogicalName>OutlookAddin.Ribbon.InspectorRibbon.xml</LogicalName>
     </EmbeddedResource>
+    <EmbeddedResource Include="Ribbon\ReadMailRibbon.xml">
+      <LogicalName>OutlookAddin.Ribbon.ReadMailRibbon.xml</LogicalName>
+    </EmbeddedResource>
     <EmbeddedResource Include="Images\klear-file.png">
       <LogicalName>OutlookAddin.Images.klear-file.png</LogicalName>
     </EmbeddedResource>

src/OutlookAddin/Properties/AssemblyInfo.cs

@@ -33,6 +33,6 @@ using System.Security;
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("1.2.4.0")]
-[assembly: AssemblyFileVersion("1.2.4.0")]
+[assembly: AssemblyVersion("1.2.16.0")]
+[assembly: AssemblyFileVersion("1.2.16.0")]
 

src/OutlookAddin/Ribbon/ExplorerRibbon.cs

@@ -19,6 +19,7 @@ namespace OutlookAddin.Ribbon
     {
         private const string ExplorerResource = "OutlookAddin.Ribbon.ExplorerRibbon.xml";
         private const string InspectorResource = "OutlookAddin.Ribbon.InspectorRibbon.xml";
+        private const string ReadMailResource = "OutlookAddin.Ribbon.ReadMailRibbon.xml";
 
         // Every button whose `getEnabled` depends on the current Explorer
         // selection must be re-evaluated on every SelectionChange — Office
@@ -40,6 +41,8 @@ namespace OutlookAddin.Ribbon
                     return LoadResource(ExplorerResource);
                 case "Microsoft.Outlook.Mail.Compose":
                     return LoadResource(InspectorResource);
+                case "Microsoft.Outlook.Mail.Read":
+                    return LoadResource(ReadMailResource);
                 default:
                     return string.Empty;
             }
@@ -77,6 +80,51 @@ namespace OutlookAddin.Ribbon
             _inspectorRibbon = ribbon;
         }
 
+        // The read-mail inspector ribbon loads fresh for each opened message,
+        // so its getEnabled callback re-runs per window — no cached IRibbonUI
+        // or invalidation is needed here.
+        public void OnReadMailRibbonLoad(IRibbonUI ribbon)
+        {
+        }
+
+        /// <summary>
+        /// Enabled when the message open in this read inspector has at least
+        /// one attachment. Mirrors <see cref="OnGetSaveAttachmentsEnabled"/>
+        /// but reads the item from the Inspector context rather than the
+        /// Explorer selection.
+        /// </summary>
+        public bool OnGetSaveAttachmentsInspectorEnabled(IRibbonControl control)
+        {
+            try
+            {
+                var inspector = control?.Context as Outlook.Inspector;
+                if (inspector?.CurrentItem is not Outlook.MailItem mail) return false;
+                var attachments = mail.Attachments;
+                if (attachments == null) return false;
+                return attachments.Count > 0;
+            }
+            catch
+            {
+                return false;
+            }
+        }
+
+        public void OnSaveAttachmentsFromInspector(IRibbonControl control)
+        {
+            try
+            {
+                var inspector = control?.Context as Outlook.Inspector;
+                if (inspector?.CurrentItem is Outlook.MailItem mail)
+                {
+                    _ = Globals.ThisAddIn.AddInHost.LaunchSaveAttachmentsAsync(mail);
+                }
+            }
+            catch (Exception ex)
+            {
+                Globals.ThisAddIn.AddInHost.Logger.Warning(ex, "OnSaveAttachmentsFromInspector failed");
+            }
+        }
+
         public bool OnGetFileToEspoCrmEnabled(IRibbonControl control)
         {
             try
@@ -206,6 +254,7 @@ namespace OutlookAddin.Ribbon
                 {
                     case "FileToEspoCrm":        fileName = "klear-file.png";     break;
                     case "SaveAttachments":      fileName = "klear-attach.png";   break;
+                    case "SaveAttachmentsRead":  fileName = "klear-attach.png";   break;
                     case "ShowSidebar":          fileName = "klear-sidebar.png";  break;
                     case "OpenEspoCrmSettings":  fileName = "klear-settings.png"; break;
                     case "ComposeFromCase":      fileName = "klear-compose.png";  break;

src/OutlookAddin/Ribbon/ReadMailRibbon.xml

@@ -0,0 +1,19 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<customUI xmlns="http://schemas.microsoft.com/office/2009/07/customui" onLoad="OnReadMailRibbonLoad">
+  <ribbon>
+    <tabs>
+      <tab idMso="TabReadMessage">
+        <group id="MarcusLawReadGroup" label="Klear">
+          <button id="SaveAttachmentsRead"
+                  label="שמור קבצים"
+                  screentip="שמור את הקבצים המצורפים בלבד"
+                  supertip="מעלה את הקבצים המצורפים של המייל הזה ל-Klear כ-Documents מקושרים לתיק שתבחר, בלי לתייק את המייל עצמו."
+                  size="large"
+                  getImage="OnGetImage"
+                  onAction="OnSaveAttachmentsFromInspector"
+                  getEnabled="OnGetSaveAttachmentsInspectorEnabled" />
+        </group>
+      </tab>
+    </tabs>
+  </ribbon>
+</customUI>

src/OutlookAddin/Services/AddInHost.cs

@@ -127,6 +127,62 @@ namespace OutlookAddin.Services
             }
         }
 
+        /// <summary>
+        /// Shows a message box that is guaranteed to render above Outlook and
+        /// any other window. A bare <see cref="MessageBox.Show(string)"/> has
+        /// no owner — once our WPF dialog closes there is no active window on
+        /// the add-in thread, so the box sinks behind Outlook and the user
+        /// never sees the success/error result. We anchor it to a transient,
+        /// invisible top-most owner window parented to the foreground Outlook
+        /// window so it always surfaces on top. Caption is always "Klear".
+        /// </summary>
+        private MessageBoxResult ShowMessage(
+            string text,
+            MessageBoxButton button = MessageBoxButton.OK,
+            MessageBoxImage icon = MessageBoxImage.None)
+        {
+            Window? owner = null;
+            try
+            {
+                // A 1×1 borderless window at screen centre: imperceptible, but
+                // gives the MessageBox a top-most owner to z-order above. The
+                // box centres on this point → effectively centred on screen.
+                owner = new Window
+                {
+                    Width = 1,
+                    Height = 1,
+                    WindowStyle = WindowStyle.None,
+                    ResizeMode = ResizeMode.NoResize,
+                    ShowInTaskbar = false,
+                    Topmost = true,
+                    WindowStartupLocation = WindowStartupLocation.CenterScreen,
+                };
+
+                var hwnd = GetForegroundWindow();
+                if (hwnd == IntPtr.Zero)
+                {
+                    hwnd = System.Diagnostics.Process.GetCurrentProcess().MainWindowHandle;
+                }
+                if (hwnd != IntPtr.Zero)
+                {
+                    new WindowInteropHelper(owner).Owner = hwnd;
+                }
+
+                owner.Show();
+                owner.Activate();
+                return MessageBox.Show(owner, text, "Klear", button, icon);
+            }
+            catch (Exception ex)
+            {
+                Logger.Warning(ex, "ShowMessage top-most owner failed; falling back to ownerless box");
+                return MessageBox.Show(text, "Klear", button, icon);
+            }
+            finally
+            {
+                try { owner?.Close(); } catch { /* ignore */ }
+            }
+        }
+
         private static void EnableModernTls()
         {
             try
@@ -402,9 +458,8 @@ namespace OutlookAddin.Services
             if (mail == null) return;
             if (!IsConfigured)
             {
-                MessageBox.Show(
+                ShowMessage(
                     "התוסף עדיין לא מוגדר. פתח את ההגדרות תחילה.",
-                    "Klear",
                     MessageBoxButton.OK,
                     MessageBoxImage.Information);
                 return;
@@ -423,9 +478,8 @@ namespace OutlookAddin.Services
             catch (Exception ex)
             {
                 Logger.Error(ex, "LaunchComposeFromCaseAsync failed");
-                MessageBox.Show(
+                ShowMessage(
                     "טעינת התיק נכשלה: " + ex.Message,
-                    "Klear",
                     MessageBoxButton.OK,
                     MessageBoxImage.Error);
             }
@@ -444,9 +498,8 @@ namespace OutlookAddin.Services
             if (mail == null) return;
             if (!IsConfigured)
             {
-                var result = MessageBox.Show(
+                var result = ShowMessage(
                     "התוסף עדיין לא מוגדר. לפתוח את חלון ההגדרות עכשיו?",
-                    "Klear",
                     MessageBoxButton.YesNo,
                     MessageBoxImage.Information);
                 if (result == MessageBoxResult.Yes) LaunchSettings();
@@ -463,9 +516,8 @@ namespace OutlookAddin.Services
             catch (Exception ex)
             {
                 Logger.Error(ex, "LaunchSaveAttachmentsAsync: extract failed");
-                MessageBox.Show(
+                ShowMessage(
                     "קריאת הקבצים המצורפים נכשלה: " + ex.Message,
-                    "Klear",
                     MessageBoxButton.OK,
                     MessageBoxImage.Error);
                 return;
@@ -473,9 +525,8 @@ namespace OutlookAddin.Services
 
             if (envelope.Attachments.Count == 0)
             {
-                MessageBox.Show(
+                ShowMessage(
                     "אין במייל הזה קבצים מצורפים לשמירה.",
-                    "Klear",
                     MessageBoxButton.OK,
                     MessageBoxImage.Information);
                 return;
@@ -485,6 +536,13 @@ namespace OutlookAddin.Services
             // Subfolders are populated lazily once the user picks a case;
             // the default static set is already pre-loaded.
 
+            // If the sender already maps to a known client, seed the case
+            // list so the user sees the identified case pre-selected instead
+            // of having to search. Uses the same matching lookup the sidebar
+            // does (cached for 10 min), so this is normally instant. Any
+            // failure here is non-fatal — the dialog still opens empty.
+            await TryPreselectSenderCaseAsync(vm, envelope.From).ConfigureAwait(true);
+
             var dialog = new SaveAttachmentsDialog(vm);
             AttachOwnerToOutlook(dialog);
             var ok = dialog.ShowDialog();
@@ -503,9 +561,8 @@ namespace OutlookAddin.Services
                 : SaveAttachmentsViewModel.ResolveCaseFolderPath(picked);
             if (string.IsNullOrEmpty(caseFolder))
             {
-                MessageBox.Show(
+                ShowMessage(
                     "לא ניתן לחשב את נתיב התיקייה של התיק. ייתכן שהתיק עוד לא הוגדר ב-Klear.",
-                    "Klear",
                     MessageBoxButton.OK,
                     MessageBoxImage.Warning);
                 return;
@@ -533,15 +590,38 @@ namespace OutlookAddin.Services
             catch (Exception ex)
             {
                 Logger.Error(ex, "LaunchSaveAttachmentsAsync failed");
-                MessageBox.Show(
+                ShowMessage(
                     "שמירת הקבצים נכשלה: " + ex.Message,
-                    "Klear",
                     MessageBoxButton.OK,
                     MessageBoxImage.Error);
             }
         }
 
-        private static void ShowAttachmentSummary(AttachmentSaveSummary summary, string caseLabel, string targetPath)
+        /// <summary>
+        /// Looks up the mail sender against the CRM (reusing the sidebar's
+        /// cached match) and, when it resolves to one or more linked cases,
+        /// seeds the save-attachments dialog so the already-identified client
+        /// case shows up pre-selected. Best-effort: swallows any error.
+        /// </summary>
+        private async Task TryPreselectSenderCaseAsync(SaveAttachmentsViewModel vm, string? senderEmail)
+        {
+            if (MatchingService == null || string.IsNullOrWhiteSpace(senderEmail)) return;
+            try
+            {
+                var match = await MatchingService.LookupAsync(senderEmail!).ConfigureAwait(true);
+                // Ambiguous (same email on several contacts) → don't guess; let
+                // the user search. A clean match with linked cases → seed them.
+                if (match == null || match.IsAmbiguous) return;
+                if (match.RecentCases == null || match.RecentCases.Count == 0) return;
+                vm.PreselectCases(match.RecentCases);
+            }
+            catch (Exception ex)
+            {
+                Logger.Warning(ex, "Sender-case preselect for save-attachments failed (non-fatal)");
+            }
+        }
+
+        private void ShowAttachmentSummary(AttachmentSaveSummary summary, string caseLabel, string targetPath)
         {
             string message;
             MessageBoxImage icon;
@@ -558,7 +638,7 @@ namespace OutlookAddin.Services
                 message = parts.Count == 0 ? "לא נשמרו פריטים." : string.Join(" · ", parts);
                 icon = summary.FailedCount > 0 ? MessageBoxImage.Warning : MessageBoxImage.Information;
             }
-            MessageBox.Show(message, "Klear", MessageBoxButton.OK, icon);
+            ShowMessage(message, MessageBoxButton.OK, icon);
         }
 
         /// <summary>
@@ -570,9 +650,8 @@ namespace OutlookAddin.Services
         {
             if (!IsConfigured)
             {
-                MessageBox.Show(
+                ShowMessage(
                     "התוסף עדיין לא מוגדר. פתח את ההגדרות תחילה.",
-                    "Klear",
                     MessageBoxButton.OK,
                     MessageBoxImage.Information);
                 return;
@@ -589,9 +668,8 @@ namespace OutlookAddin.Services
             {
                 Logger.Error(ex, "LaunchComposeFromCaseByIdAsync failed for caseId={CaseId}", caseId);
                 if (mail != null) try { Marshal.ReleaseComObject(mail); } catch { }
-                MessageBox.Show(
+                ShowMessage(
                     "פתיחת המייל מתיק נכשלה: " + ex.Message,
-                    "Klear",
                     MessageBoxButton.OK,
                     MessageBoxImage.Error);
             }
@@ -654,9 +732,8 @@ namespace OutlookAddin.Services
         {
             if (!IsConfigured)
             {
-                var result = MessageBox.Show(
+                var result = ShowMessage(
                     "התוסף עדיין לא מוגדר. לפתוח את חלון ההגדרות עכשיו?",
-                    "Klear",
                     MessageBoxButton.YesNo,
                     MessageBoxImage.Information);
                 if (result == MessageBoxResult.Yes)
@@ -669,9 +746,8 @@ namespace OutlookAddin.Services
             var mailItems = ReadCurrentSelection();
             if (mailItems.Count == 0)
             {
-                MessageBox.Show(
+                ShowMessage(
                     "לא נבחר מייל לתיוק. סמן מייל אחד או יותר ונסה שוב.",
-                    "Klear",
                     MessageBoxButton.OK,
                     MessageBoxImage.Information);
                 return;
@@ -712,9 +788,8 @@ namespace OutlookAddin.Services
                         Logger.Warning(
                             "Filing skipped — selected EspoEntityRef has no usable Id/EntityType (id={Id}, name={Name}, type={Type})",
                             vm.SelectedTarget?.Id, vm.SelectedTarget?.Name, vm.SelectedTarget?.EntityType);
-                        MessageBox.Show(
+                        ShowMessage(
                             "התיק שנבחר לא הוחזר עם סוג ישות (entityType) תקין. ייתכן ש-Klear שלך מחזיר שדה אחר; הלוג מכיל את הפרטים. שלח לאדמין.",
-                            "Klear",
                             MessageBoxButton.OK,
                             MessageBoxImage.Warning);
                         return;
@@ -886,7 +961,7 @@ namespace OutlookAddin.Services
             }
         }
 
-        private static void ShowSummary(FilingBatchSummary summary, FilingTarget target)
+        private void ShowSummary(FilingBatchSummary summary, FilingTarget target)
         {
             string message;
             MessageBoxImage icon;
@@ -907,7 +982,7 @@ namespace OutlookAddin.Services
                 icon = summary.FailedCount > 0 ? MessageBoxImage.Warning : MessageBoxImage.Information;
             }
 
-            MessageBox.Show(message, "Klear", MessageBoxButton.OK, icon);
+            ShowMessage(message, MessageBoxButton.OK, icon);
         }
 
         private static string? TryGetSenderName(Outlook.MailItem item)

src/OutlookAddin/Services/ComposeService.cs

@@ -42,21 +42,7 @@ namespace OutlookAddin.Services
             if (string.IsNullOrWhiteSpace(caseId)) throw new ArgumentException("caseId required", nameof(caseId));
 
             var caseEntity = await _client.GetCaseAsync(caseId, "id,name,number,status,contactsIds,accountId").ConfigureAwait(true);
-            ContactEntity? primaryContact = null;
-            if (caseEntity.ContactsIds != null && caseEntity.ContactsIds.Count > 0)
-            {
-                try
-                {
-                    primaryContact = await _client.GetContactAsync(
-                        caseEntity.ContactsIds[0],
-                        "id,name,emailAddress",
-                        default).ConfigureAwait(true);
-                }
-                catch (Exception ex)
-                {
-                    _logger.Warning(ex, "ComposeService: failed to load primary contact for case {CaseId}", caseId);
-                }
-            }
+            var recipientEmail = await ResolveRecipientEmailAsync(caseEntity, caseId).ConfigureAwait(true);
 
             var guid = Guid.NewGuid().ToString("N");
             StampUserProperty(mail, EspoCaseIdProperty, caseEntity.Id);
@@ -65,14 +51,14 @@ namespace OutlookAddin.Services
 
             try
             {
-                if (!string.IsNullOrWhiteSpace(primaryContact?.EmailAddress))
+                if (!string.IsNullOrWhiteSpace(recipientEmail))
                 {
                     var existingTo = mail.To ?? string.Empty;
-                    if (!existingTo.Contains(primaryContact!.EmailAddress!))
+                    if (!existingTo.Contains(recipientEmail!))
                     {
                         mail.To = string.IsNullOrEmpty(existingTo)
-                            ? primaryContact.EmailAddress
-                            : existingTo + "; " + primaryContact.EmailAddress;
+                            ? recipientEmail
+                            : existingTo + "; " + recipientEmail;
                     }
                 }
 
@@ -107,6 +93,61 @@ namespace OutlookAddin.Services
                 new FilingTarget("Case", caseEntity.Id, caseEntity.Name ?? caseEntity.Id));
         }
 
+        /// <summary>
+        /// Find a usable recipient email for the case. EspoCRM's Case.contactsIds
+        /// is a many-to-many bag (primary + co-counsel + witnesses + …) and the
+        /// first entry isn't guaranteed to be the actual client — and even when
+        /// it is, the contact may have no emailAddress stored. So walk the list
+        /// and return the first non-empty address, then fall back to the
+        /// linked Account's email.
+        /// </summary>
+        private async Task<string?> ResolveRecipientEmailAsync(CaseEntity caseEntity, string caseId)
+        {
+            if (caseEntity.ContactsIds != null)
+            {
+                foreach (var contactId in caseEntity.ContactsIds)
+                {
+                    if (string.IsNullOrWhiteSpace(contactId)) continue;
+                    try
+                    {
+                        var contact = await _client.GetContactAsync(
+                            contactId,
+                            "id,name,emailAddress,emailAddressData",
+                            default).ConfigureAwait(true);
+                        if (!string.IsNullOrWhiteSpace(contact?.EmailAddress))
+                        {
+                            return contact!.EmailAddress;
+                        }
+                    }
+                    catch (Exception ex)
+                    {
+                        _logger.Warning(ex, "ComposeService: failed to load contact {ContactId} for case {CaseId}", contactId, caseId);
+                    }
+                }
+            }
+
+            if (!string.IsNullOrWhiteSpace(caseEntity.AccountId))
+            {
+                try
+                {
+                    var account = await _client.GetAccountAsync(
+                        caseEntity.AccountId!,
+                        "id,name,emailAddress",
+                        default).ConfigureAwait(true);
+                    if (!string.IsNullOrWhiteSpace(account?.EmailAddress))
+                    {
+                        return account!.EmailAddress;
+                    }
+                }
+                catch (Exception ex)
+                {
+                    _logger.Warning(ex, "ComposeService: failed to load account {AccountId} for case {CaseId}", caseEntity.AccountId, caseId);
+                }
+            }
+
+            return null;
+        }
+
         public static string? ReadEspoCaseId(Outlook.MailItem mail) => TryReadUserProperty(mail, EspoCaseIdProperty);
         public static string? ReadEspoCaseName(Outlook.MailItem mail) => TryReadUserProperty(mail, EspoCaseNameProperty);
         public static string? ReadAddInGuid(Outlook.MailItem mail) => TryReadUserProperty(mail, AddInGuidProperty);