fix: Livechat message fetching method in LivechatBridge (#30000)

.changeset/good-elephants-live.md

+---
+'@rocket.chat/meteor': patch
+---
+
+Fixed message fetching method in LivechatBridge for Apps

apps/meteor/app/apps/server/bridges/livechat.ts

@@ -6,7 +6,7 @@ import type {
 	ILivechatTransferData,
 	IDepartment,
 } from '@rocket.chat/apps-engine/definition/livechat';
-import type { IMessage } from '@rocket.chat/apps-engine/definition/messages';
+import type { IMessage as IAppsEngineMesage } from '@rocket.chat/apps-engine/definition/messages';
 import type { IUser } from '@rocket.chat/apps-engine/definition/users';
 import { LivechatBridge } from '@rocket.chat/apps-engine/server/bridges/LivechatBridge';
 import type { SelectedAgent } from '@rocket.chat/core-typings';
@@ -280,7 +280,7 @@ export class AppLivechatBridge extends LivechatBridge {
 		return Promise.all((await LivechatDepartment.findEnabledWithAgents().toArray()).map(boundConverter));
 	}
 
-	protected async _fetchLivechatRoomMessages(appId: string, roomId: string): Promise<Array<IMessage>> {
+	protected async _fetchLivechatRoomMessages(appId: string, roomId: string): Promise<Array<IAppsEngineMesage>> {
 		this.orch.debugLog(`The App ${appId} is getting the transcript for livechat room ${roomId}.`);
 		const messageConverter = this.orch.getConverters()?.get('messages');
 
@@ -288,9 +288,9 @@ export class AppLivechatBridge extends LivechatBridge {
 			throw new Error('Could not get the message converter to process livechat room messages');
 		}
 
-		const boundMessageConverter = messageConverter.convertMessage.bind(messageConverter);
+		const livechatMessages = await Livechat.getRoomMessages({ rid: roomId });
 
-		return (await Livechat.getRoomMessages({ rid: roomId })).map(boundMessageConverter);
+		return Promise.all(livechatMessages.map((message) => messageConverter.convertMessage(message) as Promise<IAppsEngineMesage>));
 	}
 
 	protected async setCustomFields(