$includesDir = __DIR__ . '/pages';
function include_if_exists(string $file): void
        <?php include_if_exists($includesDir . '/navbar.php'); ?>
        <?php include_if_exists($includesDir . '/sidebar.php'); ?>
                <?php include_if_exists($includesDir . '/content.php'); ?>
        <?php include_if_exists($includesDir . '/footer.php'); ?>
    <!-- Modal framework only (content in includes/modal.php) -->
        <?php include_if_exists($includesDir . '/modal.php'); ?>
        <?php include_if_exists($includesDir . '/debugwin.php'); ?>