refactor(user-lifecycle): drop redundant titles and duplicate run-now button

Cleans up two leftover redundancies after the Phase-1 cockpit
foundation landed in cc2cf3a:

* The audit-list panel embedded inside the settings page rendered
  its own "User lifecycle logs" titlebar — a redundant heading
  below the page-level titlebar that already says exactly that.
  The embedded panel now renders the filter toolbar + grid
  directly. Page-level title carries the context.
* The Run-Now action existed twice — inline in a <details>-card
  inside the form and again in the aside Quick-Actions list. The
  inline version is gone; aside is the single discoverable home
  for policy-level danger actions, consistent with how Phase 1
  introduced Purge logs there too.
* The orphan $lastRunSummary string in the action and view stays
  removed accordingly. KPI tile "Last run" still carries the
  relative-time + status hint, so no information is lost — just
  surfaced once instead of twice.

Three architecture-test lists updated to match the panel's new
shape, each with an inline comment so future readers see why the
panel is intentionally absent:
* DetailActionPolicyContractFiles.migratedConfirmFiles drops the
  user-lifecycle settings view (its danger action delegates to the
  aside-actions partial, already in this list).
* ListUiSharedPartialsContractTest.purgeTitlebarTemplateFiles drops
  the panel (no titlebar of its own anymore).
* ListTitlebarContractFiles.titlebarTemplateFiles drops the panel
  for the same reason.

All six quality gates green; behaviour-identical to a user with the
required permission (purge + run-now both still available, just
sourced from the aside).

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

modules/audit/templates/settings-user-lifecycle-panel.phtml

@@ -147,16 +147,6 @@ $filterChipMeta = [
     ],
 ];
 
-$listTitle = t('User lifecycle logs');
-ob_start();
-$listPurgeEnabled = $canPurge;
-$listPurgeFormId = 'settings-user-lifecycle-audit-purge-form';
-$listPurgeAction = endpointUrl('admin/settings/user-lifecycle/audit-purge');
-$listPurgeConfirmMessage = t('Purge entries older than 365 days?');
-$listPurgeButtonLabel = t('Purge user lifecycle logs');
-require templatePath('partials/app-list-purge-action.phtml');
-$listTitleActionsHtml = ob_get_clean();
-
 $filterUiNamespace = 'settings-user-lifecycle';
 $filterToolbarId = 'settings-user-lifecycle-audit-toolbar';
 $filterDrawerToolbarId = 'settings-user-lifecycle-audit-drawer-toolbar';
@@ -182,7 +172,6 @@ $pageConfig = [
 ?>
 
 <section class="app-settings-user-lifecycle-audit" data-app-component="settings-user-lifecycle-audit">
-  <?php require templatePath('partials/app-list-titlebar.phtml'); ?>
   <?php require templatePath('partials/app-list-filters.phtml'); ?>
 
   <div class="app-list-table">