docs: add DMARC report mockups and fold add-domain into lists

Domains and Inbound keep the add field in the list card. The DMARC candidate hub drills into a domain roll-up and a parsed aggregate report, including a third-party fail. The running panel is unchanged.

Co-Authored-By: Cursor <cursoragent@cursor.com>

docs/assets/panel-ui/index.html

@@ -80,7 +80,7 @@
     <div>
       <h3>Domain-admin</h3>
       <ul>
-        <li>Domains (только назначенные) → domain</li>
+        <li>Domains (только назначенные) → domain → DMARC reports этого домена</li>
         <li>Deliveries → message, включая пояснение retry</li>
         <li>Settings — только учётные данные панели</li>
         <li>Help drawer</li>
@@ -162,7 +162,10 @@
     <a href="inbound-backup.html">Inbound domain — DNS error</a>
     <a href="inbound-delete.html">Delete inbound domain</a>
     <a href="status.html?inbound=0">Inbound выключен (пункта нет)</a>
-    <a href="dmarc.html">DMARC reports <span class="tag future">candidate</span></a>
+    <a href="dmarc.html">DMARC reports hub <span class="tag future">candidate</span></a>
+    <a href="dmarc-domain.html">DMARC — domain roll-up</a>
+    <a href="dmarc-report.html">DMARC report — aligned</a>
+    <a href="dmarc-report-fail.html">DMARC report — third-party fail</a>
     <a href="help.html">Help <span class="tag future">candidate</span></a>
   </div>
   <h3>Аварийный телефон</h3>