feat: 添加 Laravel Sanctum 支持，增强管理员 API 鉴权，更新相关中间件与路由配置

app/Models/AdminUser.php

@@ -4,14 +4,17 @@ namespace App\Models;
 
 use Illuminate\Foundation\Auth\User as Authenticatable;
 use Illuminate\Notifications\Notifiable;
+use Laravel\Sanctum\HasApiTokens;
 
 class AdminUser extends Authenticatable
 {
+    use HasApiTokens;
     use Notifiable;
 
     protected $table = 'admin_users';
 
     protected $fillable = [
+        'username',
         'name',
         'email',
         'password',