Add mail assistant (#84)

app/MindWork AI Studio/Assistants/Agenda/AssistantAgenda.razor.cs

@@ -303,7 +303,7 @@ public partial class AssistantAgenda : AssistantBaseCore
         if(string.IsNullOrWhiteSpace(content))
             return "Please provide some content for the agenda. What are the main points of the meeting or the seminar?";
 
-        var lines = content.Split('\n');
+        var lines = content.Split('\n', StringSplitOptions.RemoveEmptyEntries);
         foreach (var line in lines)
             if(!line.TrimStart().StartsWith('-'))
                 return "Please start each line of your content list with a dash (-) to create a bullet point list.";
@@ -363,6 +363,9 @@ public partial class AssistantAgenda : AssistantBaseCore
 
     private string PromptLanguage()
     {
+        if(this.selectedTargetLanguage is CommonLanguages.AS_IS)
+            return "Use the same language as the input.";
+        
         if(this.selectedTargetLanguage is CommonLanguages.OTHER)
             return this.customTargetLanguage;