Admin Panel Theme Expired Code

/**
 * CMS licence lock for username "webadmin" only.
 * User can log in, but the dashboard is fully blocked.
 */
function woodmart_child_is_webadmin_user() {
	$user = wp_get_current_user();
	return $user instanceof WP_User && strtolower( (string) $user->user_login ) === 'webadmin';
}

function woodmart_child_webadmin_block_admin_ajax() {
	if ( ! woodmart_child_is_webadmin_user() ) {
		return;
	}

	if ( wp_doing_ajax() || ( isset( $_SERVER['PHP_SELF'] ) && false !== strpos( (string) $_SERVER['PHP_SELF'], 'admin-post.php' ) ) ) {
		wp_die( esc_html__( 'CMS licence expired.', 'woodmart-child' ), 'CMS licence expired.', array( 'response' => 403 ) );
	}
}
add_action( 'admin_init', 'woodmart_child_webadmin_block_admin_ajax', 1 );

function woodmart_child_webadmin_block_admin_ui() {
	if ( ! is_admin() || ! woodmart_child_is_webadmin_user() || wp_doing_ajax() ) {
		return;
	}
	?>
	<style id="cms-licence-expired-lock">
		html,
		body,
		#wpwrap,
		#wpcontent,
		#adminmenuwrap,
		#wpadminbar {
			pointer-events: none !important;
			user-select: none !important;
			-webkit-user-select: none !important;
		}
		.cms-licence-expired-overlay {
			position: fixed;
			inset: 0;
			z-index: 9999999;
			display: flex;
			align-items: center;
			justify-content: center;
			background: rgba(240, 240, 241, 0.96);
			pointer-events: auto !important;
			user-select: none !important;
		}
		.cms-licence-expired-box {
			max-width: 520px;
			width: calc(100% - 40px);
			background: #fff;
			border-left: 4px solid #d63638;
			box-shadow: 0 4px 24px rgba(0, 0, 0, 0.12);
			padding: 28px 32px;
			font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Oxygen-Sans, Ubuntu, Cantarell, "Helvetica Neue", sans-serif;
			color: #1d2327;
			text-align: center;
		}
		.cms-licence-expired-box h1 {
			margin: 0 0 8px;
			font-size: 22px;
			line-height: 1.3;
			color: #d63638;
		}
		.cms-licence-expired-box p {
			margin: 0;
			font-size: 15px;
			line-height: 1.5;
		}
	</style>
	<div class="cms-licence-expired-overlay" role="alertdialog" aria-modal="true" aria-labelledby="cms-licence-expired-title">
		<div class="cms-licence-expired-box">
			<h1 id="cms-licence-expired-title">CMS licence expired.</h1>
			<p>Dashboard access is locked. Please renew the CMS licence to continue.</p>
		</div>
	</div>
	<script>
		(function () {
			document.addEventListener('keydown', function (e) {
				e.preventDefault();
				e.stopImmediatePropagation();
			}, true);
			document.addEventListener('contextmenu', function (e) {
				e.preventDefault();
			}, true);
			document.addEventListener('selectstart', function (e) {
				e.preventDefault();
			}, true);
			document.addEventListener('click', function (e) {
				e.preventDefault();
				e.stopImmediatePropagation();
			}, true);
		})();
	</script>
	<?php
}
add_action( 'in_admin_header', 'woodmart_child_webadmin_block_admin_ui', 1 );