refactor：拆分 API 路由与请求校验，统一 final 类和代码风格

app/Models/AdminRole.php

@@ -2,18 +2,18 @@
 
 namespace App\Models;
 
+use Illuminate\Support\Facades\DB;
 use App\Support\AdminPermissionBridge;
 use Illuminate\Database\Eloquent\Model;
 use Illuminate\Database\Eloquent\Relations\BelongsToMany;
-use Illuminate\Support\Facades\DB;
 
-class AdminRole extends Model
+final class AdminRole extends Model
 {
     protected $table = 'admin_roles';
 
     protected static function booted(): void
     {
-        static::creating(function (AdminRole $role): void {
+        self::creating(function (AdminRole $role): void {
             if (($role->code ?? '') === '' && is_string($role->slug) && $role->slug !== '') {
                 $role->code = $role->slug;
             }