Upgraded to MudBlazor 9 (#1137)

app/MindWork AI Studio/Assistants/SlideBuilder/SlideAssistant.razor.Presentation.cs

@@ -245,7 +245,7 @@ public partial class SlideAssistant
         this.LoadTemplate();
         this.ApplyPreselectedTemplateSlideUses();
         if (this.Form is not null)
-            await this.Form.Validate();
+            await this.Form.ValidateAsync();
     }
 
     /// <summary>
@@ -299,9 +299,9 @@ public partial class SlideAssistant
     /// <returns>The name, or empty when the LLM decides, which it also does when the template has no layout of this name.</returns>
     private string LayoutNameOf(LayoutPurpose purpose) => this.template is not null && this.layoutNames.TryGetValue(purpose, out var name) && this.template.FindFamilyByName(name) is not null ? name : string.Empty;
 
-    private void SetLayoutName(LayoutPurpose purpose, string name)
+    private void SetLayoutName(LayoutPurpose purpose, string? name)
     {
-        if (name.Length == 0)
+        if (string.IsNullOrEmpty(name))
             this.layoutNames.Remove(purpose);
         else
             this.layoutNames[purpose] = name;