design: panel-words - two choices of the panel kept

Following c5edbd8, two lines where the panel had already decided on
purpose, with tests that hold it (server_test.go,
TestUserDeleteSaysNothingOfReportAddresses; the user form's e-mail help):
deleting a user names no domain - "The domains" read as if one could lose
something - and the e-mail field of the user form is "the user's own
address", not "for notifications". The mockups take the panel's words.

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

docs/assets/panel-redesign/panel/user-delete.html

@@ -82,7 +82,7 @@
               <li><i class="ti ti-x"></i>end any signed-in session of this user at once;</li>
               <li><i class="ti ti-x"></i>remove the assignments to <strong>all outbound domains</strong> (outbound) and to <strong>acme.io</strong> (inbound).</li>
             </ul>
-            <p class="sp-muted mb-4">The domains, their applications and passwords, upstreams and recipients are not affected.</p>
+            <p class="sp-muted mb-4">Applications and their passwords, upstreams and recipients are not affected.</p>
             <form method="post" action="users.html">
               <div class="buttons">
                 <button type="submit" class="button is-danger"><i class="ti ti-trash"></i>Delete acme-ops</button>