Fixed and improved the system prompt of chats started from assistants (#1172)

app/MindWork AI Studio/Assistants/LegalCheck/AssistantLegalCheck.razor.cs

@@ -12,6 +12,9 @@ public partial class AssistantLegalCheck : AssistantBaseCore<SettingsDialogLegal
     
     protected override string Description => T("Provide a legal document and ask a question about it. This assistant does not replace legal advice. Consult a lawyer to get professional advice. Remember that LLMs can invent answers and facts. Please do not rely on this answers.");
     
+    // This prompt answers questions about the legal document, which is what the chat continues:
+    protected override ChatSystemPromptChoice ChatSystemPrompt => ChatSystemPromptChoice.ASSISTANT;
+
     protected override string SystemPrompt => 
         """
         You are an expert in legal matters. You have studied international law and are familiar with the law in