kompass/includes/frontend-functions.php

<?php

add_action('admin_enqueue_scripts', 'bdp_update_dashboard_style');
add_action('login_enqueue_scripts', 'bdp_update_login_style');

function bdp_update_login_style() {
    $css = file_get_contents(BDP_LV_PLUGIN_DIR . 'assets/dashboard.style.css.tpl');
    echo str_replace('%%BDP_LV_PLUGIN_URL%%', BDP_LV_PLUGIN_URL, $css);
}

function bdp_update_dashboard_style() {
    wp_enqueue_style('custom-dashboard-styles', BDP_LV_PLUGIN_URL . '/assets/wordpress-bdp.css');
    wp_enqueue_style('custom-calendar-styles', BDP_LV_PLUGIN_URL . '/assets/calendar.css');
    wp_enqueue_style('custom-security-styles', BDP_LV_PLUGIN_URL . '/assets/security.css');
}


function bdp_add_menu_mein_lv() {
    $location = BDP_LV_PLUGIN_DIR . '/modules/';
    $mainSlug = $location . 'index.php';
    $moduleLoad = get_admin_url() . 'admin.php?page=' . BDP_LV_PLUGIN_SLUG . '/modules/index.php&loadmodule=';

    add_menu_page(
        'Mein BdP',
        'BdP',
        'show_bdp',
        $mainSlug,
        '',
        BDP_LV_PLUGIN_URL . '/icon.png',
        3
    );

    add_submenu_page($mainSlug,
        'Über',
        'Über',
        'show_bdp',
        $moduleLoad . 'about'
    );
}

function bdp_create_menu_structure()
{;
    bdp_add_menu_mein_lv();
}