feat: phase 5 contact form — hCaptcha, honeypot, rate limit, notify

Working /contact POST flow: honeypot → hCaptcha server-verify →
field validation → SlowAPI 3/hr IP rate limit → contact_submissions
row → best-effort Resend notification (Reply-To = submitter) →
generic success page. Spam paths don't persist and render the same
success page (anti-enumeration). Send failures don't break the
request path — the row is already durable.

New services: HCaptchaService (async httpx + dev fallback),
ContactService. EmailService gains send_contact_notification.
Production config validator now requires ADMIN_CONTACT_EMAIL,
HCAPTCHA_SECRET, HCAPTCHA_SITE_KEY. 23 new tests, all green.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
This commit is contained in:
2026-04-22 06:47:06 -05:00
parent 67c848f329
commit d9090f5055
16 changed files with 1671 additions and 39 deletions

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{#
HTML body for the admin contact-form notification email.
Deliberately plain — email clients are hostile to CSS. ``message`` is
rendered inside a <pre> so newlines submitted by the visitor are
preserved without us having to manually convert them to <br>s (which
bleach would strip anyway).
Jinja2 autoescape is on for .html templates; every field below is
rendered via ``{{ ... }}`` without ``| safe``, so user input cannot
escape into the DOM.
Context:
- submission_name : str
- submission_email : str
- message : str
- submitted_at : ISO-8601 str
- ip : str
#}<!doctype html>
<html lang="en">
<head>
<meta charset="utf-8">
<title>New contact submission &mdash; Chicken Babies R Us</title>
</head>
<body style="font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif; color: #2B3A42; max-width: 560px; margin: 0 auto; padding: 24px;">
<h1 style="font-size: 20px; margin: 0 0 16px;">New contact submission</h1>
<p style="margin: 0 0 8px;"><strong>Name:</strong> {{ submission_name }}</p>
<p style="margin: 0 0 8px;">
<strong>Email:</strong>
<a href="mailto:{{ submission_email }}" style="color: #5D8AA8;">{{ submission_email }}</a>
</p>
<p style="margin: 0 0 8px;"><strong>Submitted at:</strong> {{ submitted_at }}</p>
<p style="margin: 0 0 16px;"><strong>IP:</strong> {{ ip }}</p>
<h2 style="font-size: 16px; margin: 16px 0 8px;">Message</h2>
<pre style="white-space: pre-wrap; word-break: break-word; font-family: inherit; font-size: 14px; background: #FAF3E7; padding: 12px 16px; border-radius: 6px; margin: 0;">{{ message }}</pre>
<p style="color: #6b7a80; font-size: 13px; margin-top: 24px;">
Replying to this email will respond directly to the sender
({{ submission_email }}).
</p>
</body>
</html>