clean code

Author: Jicheng Lu

src/lib/helpers/types/conversationTypes.js

@@ -168,7 +168,6 @@ IRichContent.prototype.language;
  * @property {boolean} has_message_files
  * @property {boolean} is_chat_message
  * @property {boolean} is_streaming
- * @property {boolean} is_append
  * @property {string} [indication]
  */
 

src/routes/chat/[agentId]/[conversationId]/chat-box.svelte

@@ -522,7 +522,6 @@
 		if (!message.is_streaming) {
 			if (dialogs[dialogs.length - 1]?.message_id === message.message_id
 				&& dialogs[dialogs.length - 1]?.sender?.role === UserRole.Assistant
-				&& !message.is_append
 			) {
 				dialogs[dialogs.length - 1] = {
 					...message,