feat: add preview message to chats

src/shared/dto.ts

@@ -70,6 +70,8 @@ export interface ChatDTO {
   lastMessage?: MessageDTO | null;
   contact?: ContactDTO | null;
   groupMetadata?: GroupMetadataDTO | null;
+
+  previewMessage?: MessageDTO | null;
 }
 
 export interface GroupMetadataDTO {

src/userscript/serializer.ts

@@ -137,6 +137,8 @@ export function serializeId(id: any): SerializedId | string | null {
 }
 
 export function serializeChat(chat: any): ChatDTO {
+  const rawPreviewMessage = safeProperty<any>(chat, "previewMessage");
+
   return {
     id: serializeId(chat.id),
     accountLid: chat.accountLid,
@@ -148,6 +150,7 @@ export function serializeChat(chat: any): ChatDTO {
     isReadOnly: chat.isReadOnly,
     archived: chat.archived,
     unreadCount: chat.unreadCount,
+    previewMessage: rawPreviewMessage ? serialize(rawPreviewMessage) : null,
 
     timestamp: chat.t,
     lastMessage: chat.lastMessage ? serialize(chat.lastMessage) : null,