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>

pages/admin/settings/user-lifecycle().php

@@ -120,18 +120,6 @@ if ($lastRunAt !== null) {
     }
 }
 
-$lastRunSummary = '';
-if ($lastRunAt !== null) {
-    $lastRunSummary = sprintf(
-        '%s: %s%s',
-        t('Last run'),
-        $lastRunRelative,
-        $lastRunStatusLabel !== '' ? ' · ' . $lastRunStatusLabel : ''
-    );
-} else {
-    $lastRunSummary = t('No runs yet');
-}
-
 $lastRunTooltip = $lastRunStatusLabel !== '' ? $lastRunStatusLabel : t('No runs yet');
 $pendingDisabled = ($deactivateDays <= 0 || $deleteDays <= 0);