design: Help covers every section; boxes link to their topic

The owner's decision (2026-10-10): help is needed by almost every
section, not by Overview and Outbound alone. The Help mockup had six
topics while other screens already linked to topics it did not have
(#dmarc, #inbound).

  - src/help.html: seventeen topics in five boxes - Overview (checks,
    certificate, rdns), Outbound (dns, apps, limits, log, queue, dmarc),
    Inbound (inbound, upstream, recipients, filter), Server (backup,
    users, settings), Account (account) - one paragraph each, and the
    side menu lists them by group.
  - A box head gets the sp-help link where a topic now exists: health,
    out-domain-settings, out-app, out-log, out-message, out-queue, the
    three DMARC screens, in-domains, in-domain, backup, users, user,
    settings. No link on boxes that explain themselves (confirmations,
    the shown-once password, sign-in) and at most one per box.
  - outlines.json regenerated (check.py --write): only help changed -
    Outbound holds six topics, and Inbound, Server and Account are new
    boxes. 0 violations.

The dns, dmarc and account topics describe the report-address scheme the
owner decided the same day (no reports / the SelfPost address / a typed
address, no user default); the account and out-domain-settings mockups
are redrawn for it in the change that follows.

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

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

@@ -11,7 +11,7 @@
       <div class="columns">
         <div class="column is-6">
           <div class="box">
-            <div class="sp-box-head"><span class="sp-no">01</span><h2>Log retention</h2></div>
+            <div class="sp-box-head"><span class="sp-no">01</span><h2>Log retention</h2><a class="sp-help" href="help.html#settings" title="How long rows are kept"><i class="ti ti-help-circle"></i></a></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>
@@ -22,7 +22,7 @@
 
         <div class="column is-6">
           <div class="box" id="rate-limits">
-            <div class="sp-box-head"><span class="sp-no">02</span><h2>Sending rate limits</h2><div class="sp-end">Read-only</div></div>
+            <div class="sp-box-head"><span class="sp-no">02</span><h2>Sending rate limits</h2><div class="sp-end">Read-only</div><a class="sp-help" href="help.html#limits" title="Levels 1 and 2"><i class="ti ti-help-circle"></i></a></div>
             <div class="sp-box-body">
               <dl class="sp-facts">
                 <div><dt>Level 1 · per client IP</dt><dd class="sp-big">600 / h</dd><dd class="sp-muted">Set in <code>.env</code>; restart to change. Nothing below may exceed it.</dd></div>