Handle null referrer in pixel tracking route

Name

lúc 07:39 13 tháng 2, 2026 UTC

Tác giả

juanisidoro

Cam kết

3d8d5a7

request.headers.get("referer") returns null when the header is absent (e.g. email clients). The Zod schema uses .optional() which accepts undefined but rejects null, causing silent validation failure and pixel events not being recorded. Fixes #4028