Matt b2588ecdd8 fix(audit-wave-1): route all email-template URLs through safeUrl
Closes Wave 1.4 (CRITICAL). Three templates still inlined URLs
directly into `href` without the existing safeUrl() helper:

- inquiry-client-confirmation: `mailto:${contactEmail}` href —
  user-supplied email straight to an HTML attribute.
- inquiry-sales-notification: `${crmUrl}` from inquiry form input.
- residential-inquiry: same `mailto:${contactEmail}` pattern.

Each call now passes through `safeUrl()` from `@/lib/email/shell`,
which (a) scheme-allow-lists to http(s)/mailto/tel/root-relative and
(b) HTML-attribute-escapes the result. A stray `"` in any URL would
have escaped the attribute; a `javascript:` scheme would have
triggered XSS in webmail clients that run scripts.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
2026-05-13 00:08:51 +02:00
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