refactor(admin): consolidate duplicate configuration

Remove duplicate comment, captcha, filing, and website-security configuration paths.

Move front submission verification to the captcha scene matrix and retire obsolete admin routes and components.

src/Settings/AuthReader.php

@@ -9,18 +9,8 @@ defined('ABSPATH') || exit;
 
 trait AuthReader {
 
-    /** 评论是否启用 */
-    public static function comment_enabled(): bool {
-        $s = self::get_all();
-        return !isset($s['comment_enabled']) || !empty($s['comment_enabled']);
-    }
-
     /** 是否要求注册用户才能评论 */
     public static function comment_requires_registration(): bool {
-        if (!self::comment_enabled()) {
-            return true;
-        }
-
         $user_id = get_current_user_id();
         return !class_exists(Capabilities::class) || !Capabilities::user_can('comment_add', $user_id);
     }