yii2 advanced admin panel on one domain

gistfile1.txt

//on backend
return [
    'homeUrl' => '/adminpanel',
    'components' => [
        'request' => [
            'baseUrl' => '/sm-admin',
        ],
        'urlManager' => [
            'enablePrettyUrl' => true,
            'showScriptName' => false,
            'rules' => [
                '' => 'site/index',
                '<controller:\w+>/<action:\w+>/' => '<controller>/<action>',
            ],
        ],
    ],
];

//on frontend
return [
    'homeUrl' => '/',
    'components' => [
        'request' => [
            'baseUrl' => '',
        ],
        'urlManager' => [
            'enablePrettyUrl' => true,
            'showScriptName' => false,
            'rules' => [
                '' => 'site/index',
                '<controller:\w+>/<action:\w+>/' => '<controller>/<action>',
            ],
        ],
    ],
];

//on app/.htaccess

Options +FollowSymLinks
IndexIgnore */*
RewriteEngine on
 
# Если запрос начинается с /sm-admin, то заменяем на /backend/web/
RewriteCond %{REQUEST_URI} ^/sm-admin
RewriteRule ^sm-admin\/?(.*) /backend/web/$1
 
# Добавляем другой запрос /frontend/web/$1
RewriteCond %{REQUEST_URI} !^/(frontend/web|backend/web|sm-admin)
RewriteRule (.*) /frontend/web/$1
 
# Если frontend запрос
RewriteCond %{REQUEST_URI} ^/frontend/web
RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
RewriteRule . /frontend/web/index.php
 
# Если backend запрос
RewriteCond %{REQUEST_URI} ^/backend/web
RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
RewriteRule . /backend/web/index.php