import re
from typing import Any, Optional


def strip_html(value: Any) -> Optional[str]:
    """Remove HTML tags from a string, returning plain text for SEO fields."""
    if not value:
        return None
    val_str = str(value).strip()
    if not val_str:
        return None
    return re.sub(r"<[^>]+>", "", val_str).strip()