design: health-setup-checks - the greeting a row of its own, as Postfix writes it

The owner, 2026-10-16, on the mockup: "Может Greeting на всю ширину
карточки?" The facts grid gets sp-wide, a fact over the whole row (shown
on the kit page), and the greeting uses it. The greeting itself is what
this image's Postfix writes: "220 mail.example.org ESMTP"
(build/postfix-config.sh sets smtpd_banner to "$myhostname ESMTP"),
not Debian's longer default. The Configuration card's address sits in a
block of its own above the text. check.py: 0 violations.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

docs/assets/panel-redesign/panel/theme.css

@@ -221,6 +221,8 @@ code { background: var(--sp-well); color: var(--sp-ink); border-radius: 3px; pad
 .sp-facts { display: grid; grid-template-columns: repeat(auto-fit, minmax(11rem, 1fr)); gap: 1rem 1.5rem; margin: 0; }
 .sp-facts dt { font-family: var(--sp-mono); font-size: var(--sp-fs-xs); letter-spacing: .08em; text-transform: uppercase; color: var(--sp-muted); }
 .sp-facts dd { margin: 0; overflow-wrap: anywhere; }
+/* A fact that takes the whole row: a line a server wrote, read as one. */
+.sp-facts .sp-wide { grid-column: 1 / -1; }
 .sp-facts dd.sp-big { font-size: 1.5rem; font-weight: 600; line-height: 1.2; }
 .sp-side { position: sticky; top: 1.5rem; }
 .menu-label { font-family: var(--sp-mono); letter-spacing: .1em; }