fix: 앱 타임존 Asia/Seoul 적용(시각 9시간 오차 수정) + 활동로그 IP 표시 제거

- appTimezone UTC → Asia/Seoul: date()가 KST로 기록되어 DB(KST)와 일치
- 활동 로그 목록/상세에서 IP 컬럼 제거

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

app/Views/admin/access/activity_log_detail.php

@@ -32,7 +32,6 @@ $fmt = static function ($v): string {
       <tr><th class="text-left bg-gray-50">사용자</th><td class="text-left pl-2"><?= $who !== '' ? esc($who) : '시스템' ?></td></tr>
       <tr><th class="text-left bg-gray-50">작업</th><td class="text-left pl-2"><?= esc($actionLabels[$act] ?? $act) ?></td></tr>
       <tr><th class="text-left bg-gray-50">대상</th><td class="text-left pl-2"><?= esc($tableLabels[$tbl] ?? $tbl) ?> (<?= esc($tbl) ?>) · 번호 <?= (int) ($row->al_record_id ?? 0) ?></td></tr>
-      <tr><th class="text-left bg-gray-50">IP</th><td class="text-left pl-2"><?= esc((string) ($row->al_ip ?? '')) ?></td></tr>
     </tbody>
   </table>