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/Messages/ReportCenter.php

@@ -159,6 +159,87 @@ class ReportCenter {
         return $result !== false;
     }
 
+    /**
+     * 获取单条举报原始行（ARRAY_A），不存在返回 null。
+     */
+    public function get_report_row(int $report_id): ?array {
+        $table = $this->table();
+        if ($table === '' || $report_id <= 0) {
+            return null;
+        }
+
+        global $wpdb;
+        $row = $wpdb->get_row($wpdb->prepare("SELECT * FROM {$table} WHERE id = %d", $report_id), ARRAY_A);
+        return $row ?: null;
+    }
+
+    /**
+     * 对举报目标执行处罚动作（REST 与原生后台共用入口）。
+     *
+     * @param string $target_type  目标类型 post/comment/user
+     * @param int    $target_id    目标 ID
+     * @param string $action_taken none/warn/mute/suspend/ban/clear/content_removed
+     * @param string $reason       处罚原因（写入限制记录）
+     * @return string 执行结果描述，未执行返回空串
+     */
+    public function apply_action(string $target_type, int $target_id, string $action_taken, string $reason = ''): string {
+        if ($target_id <= 0 || $action_taken === 'none') {
+            return '';
+        }
+
+        if ($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 '';
+    }
+
     /**
      * Get status counts for the admin dashboard.
      *