Imroved the ChatData

lib/4nk/models/ChatData.ts

@@ -1,14 +1,23 @@
 import type { RoleDefinition } from "./Roles";
 
+export interface ChatAttachment {
+  file_name: string;
+  ext: string;
+  base64: string;
+  type?: string;
+  title?: string;
+  category?: string;
+  note?: string;
+}
+
 export interface ChatData {
-  type: string;
-  content: string;
-  metadata: {
-    createdAt: string;
-    lastModified: string;
-    sender: string;
-    recipient: string;
-  };
+  timestamp: number;
+  receiver: string;
+  messages: [string];
+  data?: ChatAttachment[];
+  role?: string;
+  ia?: boolean;
+  title?: string;
 }
 
 export function isChatData(data: any): data is ChatData {