design: health-setup-checks - name, greeting and the trusted proxy on Health

Decided by the owner on 2026-10-13 (in place of preflight), taken up on
2026-10-16 ("Делай все согласованные"). Three lines in Health's cards,
no new card: TLS certificate - "Matches the hostname"; Hostname and
reverse DNS - "Greeting", Postfix's 220 line; Configuration - "Your
address", the address the panel sees the browser at and where it took it
from. The help says when each fails and what to do. check.py: 0
violations; outlines unchanged.

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

docs/assets/panel-redesign/panel/health.html

@@ -108,6 +108,7 @@
             <dl class="sp-facts">
               <div><dt>Hostname</dt><dd class="sp-mono">mail.example.org</dd></div>
               <div><dt>Lookup</dt><dd class="sp-mono">→ 203.0.113.25<br>← mail.example.org</dd></div>
+              <div><dt>Greeting</dt><dd class="sp-mono">220 mail.example.org ESMTP Postfix (Debian/GNU)</dd></div>
             </dl>
           </div>
         </div>
@@ -143,6 +144,7 @@
             <dl class="sp-facts">
               <div><dt>Expires</dt><dd class="sp-mono">2026-11-02 09:14 UTC</dd></div>
               <div><dt>Names</dt><dd class="sp-mono">mail.example.org</dd></div>
+              <div><dt>Matches the hostname</dt><dd>yes</dd></div>
               <div><dt>Renewal expires</dt><dd class="sp-mono">2027-01-31 08:02 UTC</dd></div>
               <div><dt>Renewal mounted</dt><dd class="sp-mono">2026-10-15 03:12 UTC</dd></div>
             </dl>
@@ -165,6 +167,9 @@
         <div class="box" id="configuration" data-order="8">
           <div class="sp-box-head"><span class="sp-no">08</span><h2>Configuration</h2><div class="sp-end">Safe to run at any time</div></div>
           <div class="sp-box-body">
+            <dl class="sp-facts mb-3">
+              <div><dt>Your address</dt><dd class="sp-mono">198.51.100.7</dd><dd class="sp-muted">From X-Forwarded-For, which the trusted proxy 172.18.0.1 set</dd></div>
+            </dl>
             <p class="mb-3">Regenerates the Postfix configuration and the spam filter's lists from the database, removes the keys of deleted domains, and reloads Postfix. Use it after editing the files by hand, after restoring a backup, or when the running configuration looks out of step with the domain and application lists. It does not touch the queue or the TLS certificate.</p>
             <form method="post" action="#"><button type="submit" class="button"><i class="ti ti-reload"></i>Reload configuration</button></form>
           </div>