function serializeCell(value, delimiter) {
    const raw = String(value ?? '');
    const formulaLike = /^[\u0000-\u0020\uFEFF]*[=+\-@]/.test(raw);
    const numeric = /^-?\d+(?:\.\d+)?$/.test(raw);
    const text = formulaLike && !numeric ? `'${raw}` : raw;

    return /[",\r\n]/.test(text) || text.includes(delimiter)
        ? `"${text.replaceAll('"', '""')}"`
        : text;
}

/** Serializes a comma-separated cell and neutralizes spreadsheet formulas. */
export function csvCell(value) {
    return serializeCell(value, ',');
}

/** Serializes a cell for a locale-specific delimited export. */
export function csvCellWithDelimiter(value, delimiter) {
    return serializeCell(value, delimiter);
}