def format_target_display(raw: str) -> str:
    if raw.startswith("chat_guid:"):
        guid = raw[len("chat_guid:") :]
        parts = guid.split(";")
        if len(parts) >= 3:
            return parts[2]
        return guid[:12] + "..."
    return raw


def format_chat_display(chat_data: dict) -> str:
    name = chat_data.get("displayName") or chat_data.get("chat_identifier") or chat_data.get("guid", "")
    return name


def format_participant_display(participant: dict) -> str:
    name = participant.get("displayName") or participant.get("name") or ""
    if not name:
        handle = participant.get("handle") or participant.get("id", "")
        name = handle
    return name