replace background with ascii sakura side art

inc/header.php

@@ -1,30 +1,14 @@
 <?php
 require_once __DIR__ . '/../config.php';
-require_once __DIR__ . '/backgrounds.php';
-$bgs = bg_styles();
-$bgPick = bg_pick();
-// the page picks a style per request, so don't let a cached copy pin one
-header('Cache-Control: no-store');
 ?>
 <!doctype html>
-<html lang="en"<?= $bgPick !== '' ? ' data-bg="' . htmlspecialchars($bgPick) . '"' : '' ?>>
+<html lang="en">
 <head>
   <meta charset="utf-8">
   <meta name="viewport" content="width=device-width, initial-scale=1">
   <title><?= htmlspecialchars($page_title ?? SITE_TITLE) ?></title>
   <link rel="icon" href="/img/favicon.ico" sizes="any">
   <link rel="stylesheet" href="/css/style.css">
-<?php if ($bgs): ?>
-  <style>
-    /* One custom property per style; data-bg on <html> selects which.
-       Only the matching rule's url() is ever fetched, so the styles that
-       are not showing cost nothing but a line of CSS. */
-    :root { --bg-img: url("/img/bg/<?= rawurlencode(bg_default()) ?>.png"); }
-<?php foreach ($bgs as $b): ?>
-    html[data-bg="<?= htmlspecialchars($b) ?>"] { --bg-img: url("/img/bg/<?= rawurlencode($b) ?>.png"); }
-<?php endforeach; ?>
-  </style>
-<?php endif; ?>
   <script src="/js/htmx.min.js" defer></script>
   <script src="/js/idiomorph-ext.min.js" defer></script>
 </head>