Fix last message timestamp in history_sync_conversation table

database/historysync.go

@@ -80,8 +80,8 @@ func (hsq *HistorySyncQuery) NewConversationWithValues(
 		UserID:                   userID,
 		ConversationID:           conversationID,
 		PortalKey:                portalKey,
-		LastMessageTimestamp:     time.Unix(int64(lastMessageTimestamp), 0),
-		MuteEndTime:              time.Unix(int64(muteEndTime), 0),
+		LastMessageTimestamp:     time.Unix(int64(lastMessageTimestamp), 0).UTC(),
+		MuteEndTime:              time.Unix(int64(muteEndTime), 0).UTC(),
 		Archived:                 archived,
 		Pinned:                   pinned,
 		DisappearingMode:         disappearingMode,