message edit/update functionality

backend/server.py

@@ -190,6 +190,16 @@ def start_server(app):
                     )
                     await send({'message': "message sent", 'messageId': message['id'], 'nonce': nonce})
 
+                elif action == "update-chat-message":
+                    message = app.update_chat_message(
+                        message_id=body['messageId'],
+                        content=body['content'],
+                        kind=body.get('kind'),
+                        subkind=body.get('subkind'),
+                        format=body.get('format'),
+                    )
+                    await send({'message': "message sent", 'messageId': body['messageId'], 'nonce': nonce})
+
                 elif action == "create-chat-thread":
                     thread_id = app.create_chat_thread(
                         chat_id=body['chatId'],