style(adminui): btn-groups + prose trim on top-level ops pages

Group related action buttons into btn-group/btn-group-sm on Alerts, Certificates,
ApiKeys and ScriptEdit; promote the RoleGrants Delete from btn-link to
btn-outline-danger. Replace the two inline style="border-color:var(--alert)"
no-ops with the .notice-alert class, and the undefined --surface-2 token in
Scripts with the theme's shipped --zebra-bg.

Delete unconditional documentation prose now covered by docs/ (Redundancy,
Telemetry, AlarmTracking, security, Reservations, AlarmHistorian, ScriptEditor),
keeping state banners and live captions. Correct the LDAP config key on
RoleGrants to Security:Ldap:GroupToRole (LdapOptions.SectionName) and drop the
same wrong key from Account with its deleted block; reword the stale
"Engine emit (F8/F9) is pending" script-log empty state.

src/Server/ZB.MOM.WW.OtOpcUa.AdminUI/Components/Pages/Scripts.razor

@@ -17,12 +17,6 @@
 }
 else
 {
-    <section class="panel notice rise" style="animation-delay:.02s">
-        Scripts are fleet-wide C# expression compilations referenced by virtual tags and scripted
-        alarms. The editor provides Roslyn-backed IntelliSense — completions, diagnostics, hover,
-        and tag-path suggestions for <code>ctx.GetTag</code> / <code>ctx.SetVirtualTag</code> literals.
-    </section>
-
     <section class="panel rise mt-3" style="animation-delay:.08s">
         <div class="panel-head">@_rows.Count script@(_rows.Count == 1 ? "" : "s")</div>
         @if (_rows.Count == 0)
@@ -44,7 +38,7 @@ else
                         <div class="d-flex mb-2">
                             <a href="/scripts/@s.ScriptId" class="btn btn-sm btn-outline-primary">Edit</a>
                         </div>
-                        <pre class="mono small" style="background:var(--surface-2);padding:1rem;border-radius:4px;overflow:auto">@s.SourceCode</pre>
+                        <pre class="mono small" style="background:var(--zebra-bg);padding:1rem;border-radius:4px;overflow:auto">@s.SourceCode</pre>
                     </div>
                 </details>
             }