Merged the two validation systems of the visual briefing editor into one

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

@@ -79,7 +79,6 @@
                 else
                 {
                     <MudForm @ref="@(this.visualBriefingForm)"
-                             @bind-IsValid="@(this.formIsValid)"
                              @bind-Errors="@(this.formIssues)">
                         <MudStack Row="true" Justify="Justify.SpaceBetween" AlignItems="AlignItems.Center" Wrap="Wrap.Wrap" Class="mb-3">
                             <MudText Typo="Typo.h3">@this.editor.Name</MudText>

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

@@ -23,20 +23,23 @@ public partial class VisualBriefingAssistant
     private bool CannotRecompile => this.IsCurrentBusy || this.selectedBriefing is null || this.selectedRevisionId == Guid.Empty || !this.SelectedVersionSupportsEdits;
 
     /// <summary>
-    /// Defines <c>CannotGenerate</c> for the visual briefing feature.
+    /// Gets whether one edit mode is currently blocked.
     /// </summary>
+    /// <remarks>
+    /// A mode is blocked by the very issues listed below the buttons, minus the ones that do not apply
+    /// to it. Changing only the design rebuilds the presentation from the validated content of a stored
+    /// version, so it neither needs source material nor cares whether a source file moved away in the
+    /// meantime. The two modes that edit a stored version instead require that version to still carry
+    /// its semantic artifacts.
+    /// </remarks>
+    /// <param name="mode">The edit mode the user asked for.</param>
+    /// <returns><c>true</c> when the mode must stay disabled.</returns>
     private bool CannotGenerate(VisualBriefingEditMode mode) =>
         this.IsCurrentBusy ||
-        this.editor.Provider == ProviderSettings.NONE ||
+        this.selectedBriefing is null ||
-        string.IsNullOrWhiteSpace(this.editor.Name) ||
+        this.FieldIssues.Count > 0 ||
-        this.editor.TargetLanguage is CommonLanguages.OTHER && string.IsNullOrWhiteSpace(this.editor.CustomTargetLanguage) ||
+        mode is not VisualBriefingEditMode.CHANGE_DESIGN && this.SourceIssues.Count > 0 ||
-        this.editor.ProtectionLevel is VisualBriefingProtectionLevel.OTHER && string.IsNullOrWhiteSpace(this.editor.CustomProtectionLevel) ||
+        mode is VisualBriefingEditMode.CHANGE_DESIGN or VisualBriefingEditMode.UPDATE_CONTENT && !this.SelectedVersionSupportsEdits;
-        mode is not VisualBriefingEditMode.CHANGE_DESIGN && !this.HasSourceMaterial ||
-        mode is VisualBriefingEditMode.CHANGE_DESIGN or VisualBriefingEditMode.UPDATE_CONTENT &&
-        !this.SelectedVersionSupportsEdits ||
-        mode is not VisualBriefingEditMode.CHANGE_DESIGN &&
-        this.selectedBriefing?.Sources.Any(source =>
-            source.Status is VisualBriefingSourceStatus.UNREACHABLE or VisualBriefingSourceStatus.TRANSCRIPT_OUTDATED) == true;
 
     /// <summary>
     /// Runs one long-running briefing operation inside the shared session, progress, and error envelope.

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

@@ -269,7 +269,6 @@ public partial class VisualBriefingAssistant
 
         this.lastPersistedState = this.BuildPersistenceFingerprint();
         this.formIssues = [];
-        this.formIsValid = false;
         this.formValidationPending = true;
     }
 
@@ -304,7 +303,6 @@ public partial class VisualBriefingAssistant
         this.reusableContentBuildId = null;
         this.lastPersistedState = string.Empty;
         this.formIssues = [];
-        this.formIsValid = false;
         this.formValidationPending = false;
         this.visualBriefingForm?.ResetValidation();
     }

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

@@ -16,19 +16,51 @@ public partial class VisualBriefingAssistant
     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>
+    /// <remarks>
+    /// This is the complete list for the user. The generate buttons disable themselves from the same
+    /// two building blocks, so a listed issue and a blocked button can no longer contradict each other.
+    /// Only the MudBlazor field messages stay out of that gate: they arrive one validation pass late,
+    /// which would make the buttons flicker, and the validators behind them are evaluated directly by
+    /// FieldIssues anyway.
+    /// </remarks>
     private IReadOnlyList<string> ValidationIssues
     {
         get
         {
-            List<string> issues = [.. this.formIssues];
+            List<string> issues = [.. this.formIssues, .. this.FieldIssues, .. this.SourceIssues];
+
+            if (this.selectedBriefing is { Versions.Count: > 0 } && !this.SelectedVersionSupportsEdits)
+                issues.Add(T("This version has no compatible semantic artifacts. Rebuild the briefing instead."));
+
+            return [.. issues.Where(issue => !string.IsNullOrWhiteSpace(issue)).Distinct(StringComparer.Ordinal)];
+        }
+    }
+
+    /// <summary>Gets the field issues that block generation regardless of the edit mode.</summary>
+    private IReadOnlyList<string> FieldIssues
+    {
+        get
+        {
+            List<string> issues = [];
 
             AddIssue(issues, this.ValidateProjectName(this.editor.Name));
             AddIssue(issues, this.ValidateProvider(this.editor.Provider));
             AddIssue(issues, this.ValidateCustomTargetLanguage(this.editor.CustomTargetLanguage));
             AddIssue(issues, this.ValidateCustomProtectionLevel(this.editor.CustomProtectionLevel));
 
-            if (this.selectedBriefing is not null)
+            return issues;
+        }
+    }
+
+    /// <summary>Gets the issues with the stored sources, which block only the modes that read them.</summary>
+    private IReadOnlyList<string> SourceIssues
     {
+        get
+        {
+            if (this.selectedBriefing is null)
+                return [];
+
+            List<string> issues = [];
             if (!this.HasSourceMaterial)
                 issues.Add(T("Please add at least one source material file."));
 
@@ -47,11 +79,7 @@ public partial class VisualBriefingAssistant
                 }
             }
 
-                if (this.selectedBriefing.Versions.Count > 0 && !this.SelectedVersionSupportsEdits)
+            return issues;
-                    issues.Add(T("This version has no compatible semantic artifacts. Rebuild the briefing instead."));
-            }
-
-            return [.. issues.Where(issue => !string.IsNullOrWhiteSpace(issue)).Distinct(StringComparer.Ordinal)];
         }
     }
 

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

@@ -123,9 +123,6 @@ public partial class VisualBriefingAssistant : MSGComponentBase
     /// <summary>Owns MudBlazor validation for the selected briefing editor.</summary>
     private MudForm? visualBriefingForm;
 
-    /// <summary>Stores whether all MudBlazor fields in the editor are currently valid.</summary>
-    private bool formIsValid;
-
     /// <summary>Stores the current MudBlazor validation messages.</summary>
     private string[] formIssues = [];