fix(app): show the full user tag beside display names instead of a bare discriminator (#1696)

fluxer_app/src/features/messaging/hooks/use_textarea_autocomplete/builders.ts

@@ -42,7 +42,7 @@ export function getMemberDisplayName(member: GuildMember): string {
 }
 
 export function getUserDisplayName(user: User): string {
-	return firstDisplayText(user.displayName, user.username, user.id);
+	return DisplayNameUtils.getUntruncatedNickname(user, null);
 }
 
 export interface ParsedMentionQuery {