feat(admin): rebuild ban page to mirror the reference theme

- rename the users.php submenu to 举报&禁封申诉 and the page heading to
  用户禁封申诉及用户举报管理
- merge report tickets and ban appeals into one Zibll-style queue:
  type filter buttons (全部/禁封申诉/用户举报), status subsubsub
  (全部/待处理/已批准/已拒绝), search box, sortable widefat table with
  the same column set (状态/类型/提交用户/详情/提交时间/更新时间),
  inline process forms and 20-per-page pagination
- report process form shows the reported target, restriction status and
  an enforcement action select; appeal form offers approve/reject radios
  with a message to the user
- move restriction enforcement into ReportCenter::apply_action so REST
  and the native page share one implementation; add get_report_row()
- drop the old three-tab rendering (reports/appeals tabs) and fix all
  notice/mail/SPA links to the merged page

src/Admin/UserControllerReportOperations.php

@@ -354,61 +354,10 @@ trait UserControllerReportOperations {
     }
 
     private function apply_report_action(string $target_type, int $target_id, string $action_taken, string $reason = ''): string {
-        if ($target_id <= 0 || $action_taken === 'none') {
+        if (!class_exists('\AKSRT\Messages\ReportCenter')) {
             return '';
         }
-
-        if ($target_type === 'user') {
-            if (!class_exists('\AKSRT\User\Restriction')) {
-                return '';
-            }
-            $svc = \AKSRT\User\Restriction::get_instance();
-
-            if ($action_taken === 'clear') {
-                $removed = $svc->lift_user_restriction($target_id);
-                return $removed > 0
-                    ? sprintf(__('已解除 %d 条生效中的限制', 'aksrt'), $removed)
-                    : __('该用户没有生效中的限制', 'aksrt');
-            }
-
-            if (in_array($action_taken, \AKSRT\User\Restriction::TYPES, true)) {
-                $labels = [
-                    \AKSRT\User\Restriction::TYPE_WARN    => __('警告', 'aksrt'),
-                    \AKSRT\User\Restriction::TYPE_MUTE    => __('禁言', 'aksrt'),
-                    \AKSRT\User\Restriction::TYPE_SUSPEND => __('停权', 'aksrt'),
-                    \AKSRT\User\Restriction::TYPE_BAN     => __('封禁', 'aksrt'),
-                ];
-                $result = $svc->restrict(
-                    $target_id,
-                    $action_taken,
-                    $reason !== '' ? $reason : __('举报处理处罚', 'aksrt'),
-                    \AKSRT\User\Restriction::SCOPE_GLOBAL,
-                    '',
-                    get_current_user_id()
-                );
-                if (!empty($result['success'])) {
-                    return sprintf(__('已对用户执行限制：%s', 'aksrt'), $labels[$action_taken] ?? $action_taken);
-                }
-                return '';
-            }
-
-            return '';
-        }
-
-        if ($action_taken === 'content_removed' && $target_type === 'post' && get_post($target_id)) {
-            wp_update_post([
-                'ID'          => $target_id,
-                'post_status' => 'pending',
-            ]);
-            return __('已将内容改为待审状态', 'aksrt');
-        }
-
-        if ($action_taken === 'content_removed' && $target_type === 'comment' && get_comment($target_id)) {
-            wp_set_comment_status($target_id, 'hold', true);
-            return __('已将评论改为待审状态', 'aksrt');
-        }
-
-        return '';
+        return \AKSRT\Messages\ReportCenter::get_instance()->apply_action($target_type, $target_id, $action_taken, $reason);
     }
 
     private function get_report_status_options(): array {