// What a nav count shows. An incomplete count (some reads failed) is a floor, never an exact number,
// and an incomplete zero is unknown rather than nothing.
export const navCount = (count: number, incomplete: boolean): { text: string; label: string } | null => {
    if (incomplete) {
        return count > 0
            ? { text: `${count}+`, label: `At least ${count} unread; some messages could not be checked` }
            : { text: '?', label: 'Some messages could not be checked' };
    }
    return count > 0 ? { text: String(count), label: `${count} unread` } : null;
};