docs: draw every panel screen in the accepted redesign direction

Stage 2 of the panel redesign. Direction C (Bulma) is the base — the
important things in view, details one or two clicks away — with A's
postal signature (postmark verdict, numbered mono section heads, the
stamp's perforated edge) and B's icons. 29 screens under
docs/assets/panel-redesign/panel/, linked into a click-through.

Overview keeps verdicts only; the process, socket and interface tables
move to a new Server > Health page. The own password becomes Account,
queues are drawn as tables (needs postqueue -j), and Inbound gets its
own Log and Queue. Every page is one of three layouts, so none picks
its own width.

Pages are built from panel/src fragments by panel/build.py so the navbar
lives in one place; the built HTML is committed. The cover sheet now
leads with the screen map and keeps the three stage-1 directions below.

Mockups only; internal/web is untouched.

Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com>

docs/assets/panel-redesign/panel/src/settings.html

@@ -0,0 +1,55 @@
+<!-- title: Settings | section: server | page: settings -->
+    <div class="sp-head">
+      <div class="sp-grow">
+        <p class="sp-kicker">Server</p>
+        <h1 class="title is-3">Settings</h1>
+        <p class="sp-lead">Defaults for the whole instance. Your own username and password are under <a href="account.html">Account</a>.</p>
+      </div>
+    </div>
+
+    <form class="sp-form" method="post" action="#">
+      <div class="columns">
+        <div class="column is-7">
+          <div class="box">
+            <div class="sp-box-head"><span class="sp-no">01</span><h2>DMARC aggregate reports</h2><div class="sp-end"><span class="tag is-success is-light">authorized</span></div></div>
+            <div class="sp-record">
+              <div class="field"><label class="label" for="rua">Default report address</label>
+                <div class="control has-icons-left"><input class="input" id="rua" name="dmarc_report_email" type="email" value="dmarc@mail.example.org"><span class="icon is-left"><i class="ti ti-mail"></i></span></div>
+                <p class="help">The default <code>rua=</code> for every outbound domain; a domain may override it. An address on <code>mail.example.org</code> is received and parsed by SelfPost itself.</p></div>
+            </div>
+            <div class="sp-record">
+              <div class="sp-record-head"><h3>Report authorization</h3><span class="tag is-success is-light">published</span><small>Needed when <code>rua=</code> points at another domain</small></div>
+              <div class="sp-row">
+                <div class="field"><label class="label">Host / name</label>
+                  <div class="field has-addons"><div class="control is-expanded"><input class="input" readonly value="*._report._dmarc.mail.example.org"></div><div class="control"><button type="button" class="button"><i class="ti ti-copy"></i>Copy</button></div></div></div>
+                <div class="field"><label class="label">Type</label><div class="control"><input class="input" readonly value="TXT"></div></div>
+              </div>
+              <div class="field"><label class="label">Value to publish</label>
+                <div class="field has-addons"><div class="control is-expanded"><input class="input" readonly value="v=DMARC1"></div><div class="control"><button type="button" class="button"><i class="ti ti-copy"></i>Copy</button></div></div></div>
+            </div>
+          </div>
+        </div>
+
+        <div class="column is-5">
+          <div class="box">
+            <div class="sp-box-head"><span class="sp-no">02</span><h2>Log retention</h2></div>
+            <div class="sp-box-body">
+              <div class="field"><label class="label" for="ret">Keep outbound log rows, days</label>
+                <div class="control"><input class="input" id="ret" name="send_log_retention_days" type="number" min="7" max="365" value="30" required></div>
+                <p class="help">The main driver of <code>/data</code> growth. Does not affect <code>mail.log</code> rotation (fourteen daily files).</p></div>
+            </div>
+          </div>
+
+          <div class="box" id="rate-limits">
+            <div class="sp-box-head"><span class="sp-no">03</span><h2>Sending rate limits</h2><div class="sp-end">Read-only</div></div>
+            <div class="sp-box-body">
+              <dl class="sp-facts">
+                <div><dt>Level 1 · per client IP</dt><dd class="is-big">600 / h</dd><dd class="sp-muted">Set in <code>.env</code>; restart to change. Nothing below may exceed it.</dd></div>
+                <div><dt>Level 2 · domain, application</dt><dd>Set on each <a href="out-domain-settings.html#limit">domain</a> and <a href="out-app.html">application</a>.</dd></div>
+              </dl>
+            </div>
+          </div>
+        </div>
+      </div>
+      <div class="buttons"><button type="submit" class="button is-primary">Save settings</button></div>
+    </form>