Covers: notify_parent() on AdminNotifier, multipart HTML email with inline Swiss QR-bill (qrbill library), CHF 80 fixed payment data, German default language, best-effort error handling. https://claude.ai/code/session_01LjjK7RjKVnC8bETtccfgna
Covers: notify_parent() on AdminNotifier, multipart HTML email with inline Swiss QR-bill (qrbill library), CHF 80 fixed payment data, German default language, best-effort error handling. https://claude.ai/code/session_01LjjK7RjKVnC8bETtccfgna