successMessage was collected in props (and FormStylePanel already had a
live "Success Message" input for it) but toHtml never emitted it anywhere.
The form-sender relay delivers success via a full-page 303 redirect to
thankYouUrl or a hosted thanks.php page -- there is no in-page JS today
that could reveal an inline success element. Emit it as
data-whp-success-message (escaped) on the <form>: forward-compatible for a
future AJAX submission mode, without implying a live mechanism that
doesn't exist yet.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
Fix non-relay form output to match pre-change byte-for-byte by conditionally omitting the honeypot and fields lines when empty. Add backward-compat regex assertion to catch extra blank lines.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>