Added a warning when files are removed from the source material

app/MindWork AI Studio/Assistants/I18N/allTexts.lua

@@ -2356,6 +2356,9 @@ UI_TEXT_CONTENT["AISTUDIO::ASSISTANTS::VISUALBRIEFING::VISUALBRIEFINGASSISTANT::
 -- Documents, spreadsheets, images, audio, and video are considered as source context.
 UI_TEXT_CONTENT["AISTUDIO::ASSISTANTS::VISUALBRIEFING::VISUALBRIEFINGASSISTANT::T2228157968"] = "Documents, spreadsheets, images, audio, and video are considered as source context."
 
+-- These files are already attached as visual assets and were removed from the source material: {0}
+UI_TEXT_CONTENT["AISTUDIO::ASSISTANTS::VISUALBRIEFING::VISUALBRIEFINGASSISTANT::T2271225937"] = "These files are already attached as visual assets and were removed from the source material: {0}"
+
 -- Target language
 UI_TEXT_CONTENT["AISTUDIO::ASSISTANTS::VISUALBRIEFING::VISUALBRIEFINGASSISTANT::T237828418"] = "Target language"
 

app/MindWork AI Studio/Assistants/VisualBriefing/VisualBriefingAssistant.razor

@@ -122,7 +122,7 @@
                                     <AttachDocuments Name="Visual briefing source material"
                                                      Layer="@DropLayers.ASSISTANTS"
                                                      @bind-DocumentPaths="@this.editor.SourceMaterial"
-                                                     OnChange="@this.SourceMaterialChangedAsync"
+                                                     OnChange="@this.EnforceSourceExclusivityAsync"
                                                      CatchAllDocuments="true"
                                                      UseSmallForm="false"
                                                      Provider="@this.editor.Provider"
@@ -136,7 +136,7 @@
                                     <AttachDocuments Name="Visual briefing visual assets"
                                                      Layer="@DropLayers.ASSISTANTS"
                                                      @bind-DocumentPaths="@this.editor.VisualAssets"
-                                                     OnChange="@this.VisualAssetsChangedAsync"
+                                                     OnChange="@this.EnforceSourceExclusivityAsync"
                                                      CatchAllDocuments="false"
                                                      UseSmallForm="false"
                                                      AllowedFileTypes="@(new[] { FileTypes.VISUAL_BRIEFING_IMAGE })"

app/MindWork AI Studio/Assistants/VisualBriefing/VisualBriefingAssistant.razor.Sources.cs

@@ -16,22 +16,32 @@ public partial class VisualBriefingAssistant
         : MediaImportOwner.ForVisualBriefing(this.selectedBriefing.BriefingId);
 
     /// <summary>
-    /// Defines <c>SourceMaterialChangedAsync</c> for the visual briefing feature.
+    /// Keeps source material and visual assets mutually exclusive after either list changed.
     /// </summary>
-    private async Task SourceMaterialChangedAsync(HashSet<FileAttachment> _)
+    /// <remarks>
+    /// A file is either source material or a visual asset, never both: visual assets have to appear in
+    /// the briefing, while source material only feeds the analysis. Visual assets win, so the overlap is
+    /// always resolved on the source-material side. Both attachment controls route here because either
+    /// one can create the overlap — the source-material control catches all document kinds, including
+    /// the image types the visual-asset control is limited to. The warning matters because the file
+    /// would otherwise vanish from the source-material list without any explanation, possibly leaving
+    /// the briefing without the source material it requires.
+    /// </remarks>
+    /// <param name="_">The changed attachment set. It is ignored because both lists are inspected anyway.</param>
+    private async Task EnforceSourceExclusivityAsync(HashSet<FileAttachment> _)
     {
         var visualPaths = this.editor.VisualAssets.Select(attachment => attachment.FilePath).ToHashSet(PathComparer());
-        this.editor.SourceMaterial.RemoveWhere(attachment => visualPaths.Contains(attachment.FilePath));
+        var displaced = this.editor.SourceMaterial.Where(attachment => visualPaths.Contains(attachment.FilePath)).ToArray();
-        await this.SaveCurrentAsync(reload: true);
+        if (displaced.Length > 0)
-    }
+        {
+            this.editor.SourceMaterial.ExceptWith(displaced);
+            await this.MessageBus.SendWarning(new(
+                Icons.Material.Filled.Warning,
+                string.Format(
+                    T("These files are already attached as visual assets and were removed from the source material: {0}"),
+                    string.Join(", ", displaced.Select(attachment => Path.GetFileName(attachment.FilePath))))));
+        }
 
-    /// <summary>
-    /// Defines <c>VisualAssetsChangedAsync</c> for the visual briefing feature.
-    /// </summary>
-    private async Task VisualAssetsChangedAsync(HashSet<FileAttachment> _)
-    {
-        var visualPaths = this.editor.VisualAssets.Select(attachment => attachment.FilePath).ToHashSet(PathComparer());
-        this.editor.SourceMaterial.RemoveWhere(attachment => visualPaths.Contains(attachment.FilePath));
         await this.SaveCurrentAsync(reload: true);
     }
 

app/MindWork AI Studio/Assistants/VisualBriefing/VisualBriefingAssistant.razor.Validation.cs

@@ -7,6 +7,12 @@ namespace AIStudio.Assistants.VisualBriefing;
 public partial class VisualBriefingAssistant
 {
     /// <summary>Gets whether the briefing contains at least one actual source-material file.</summary>
+    /// <remarks>
+    /// This deliberately reads the stored manifest instead of the editor state: a build always runs
+    /// against what the store accepted, and the store drops attachments whose file disappeared before
+    /// the save. Every path that changes sources therefore has to save with a reload, otherwise this
+    /// check keeps reporting the state from before the change.
+    /// </remarks>
     private bool HasSourceMaterial => this.selectedBriefing?.Sources.Any(source => source.Kind is VisualBriefingSourceKind.SOURCE_MATERIAL) == true;
 
     /// <summary>Gets all current field, source, and revision issues shown below the actions.</summary>

app/MindWork AI Studio/Plugins/languages/de-de-43065dbc-78d0-45b7-92be-f14c2926e2dc/plugin.lua

@@ -2358,6 +2358,9 @@ UI_TEXT_CONTENT["AISTUDIO::ASSISTANTS::VISUALBRIEFING::VISUALBRIEFINGASSISTANT::
 -- Documents, spreadsheets, images, audio, and video are considered as source context.
 UI_TEXT_CONTENT["AISTUDIO::ASSISTANTS::VISUALBRIEFING::VISUALBRIEFINGASSISTANT::T2228157968"] = "Dokumente, Tabellenkalkulationen, Bilder, Audio- und Videodateien werden als Ausgangsmaterial berücksichtigt."
 
+-- These files are already attached as visual assets and were removed from the source material: {0}
+UI_TEXT_CONTENT["AISTUDIO::ASSISTANTS::VISUALBRIEFING::VISUALBRIEFINGASSISTANT::T2271225937"] = "Diese Dateien sind bereits als visuelle Elemente angehängt und wurden aus dem Ausgangsmaterial entfernt: {0}"
+
 -- Target language
 UI_TEXT_CONTENT["AISTUDIO::ASSISTANTS::VISUALBRIEFING::VISUALBRIEFINGASSISTANT::T237828418"] = "Zielsprache"
 

app/MindWork AI Studio/Plugins/languages/en-us-97dfb1ba-50c4-4440-8dfa-6575daf543c8/plugin.lua

@@ -2358,6 +2358,9 @@ UI_TEXT_CONTENT["AISTUDIO::ASSISTANTS::VISUALBRIEFING::VISUALBRIEFINGASSISTANT::
 -- Documents, spreadsheets, images, audio, and video are considered as source context.
 UI_TEXT_CONTENT["AISTUDIO::ASSISTANTS::VISUALBRIEFING::VISUALBRIEFINGASSISTANT::T2228157968"] = "Documents, spreadsheets, images, audio, and video are considered as source context."
 
+-- These files are already attached as visual assets and were removed from the source material: {0}
+UI_TEXT_CONTENT["AISTUDIO::ASSISTANTS::VISUALBRIEFING::VISUALBRIEFINGASSISTANT::T2271225937"] = "These files are already attached as visual assets and were removed from the source material: {0}"
+
 -- Target language
 UI_TEXT_CONTENT["AISTUDIO::ASSISTANTS::VISUALBRIEFING::VISUALBRIEFINGASSISTANT::T237828418"] = "Target language"