Add optional episode titles to queued and live broadcasts

Store an episode_title on each broadcast, settable from the dashboard
or with set_show.php --title=, and show it under the show name on
index.php and under the heading on live.php.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

live.php

@@ -70,6 +70,11 @@ if ($show && $show['background_image'] && is_file(__DIR__ . '/images/backgrounds
 		            box-sizing: border-box;
 		            width: 100%;
 		        }
+		        .episode-title {
+		            font-size: 1.25em;
+		            font-style: italic;
+		            margin-top: -0.75em;
+		        }
 		        #recently-played td {
 		            vertical-align: middle;
 		        }
@@ -159,6 +164,9 @@ if ($show && $show['background_image'] && is_file(__DIR__ . '/images/backgrounds
 					<section id="one">
 						<header class="major">
 							<h2>Recently Played<?php if ($show): ?> on <?= htmlspecialchars($show['name'], ENT_QUOTES, 'UTF-8') ?><?php endif; ?></h2>
+<?php if ($show && $show['episode_title']): ?>
+							<p class="episode-title"><?= htmlspecialchars($show['episode_title'], ENT_QUOTES, 'UTF-8') ?></p>
+<?php endif; ?>
 						</header>
 						<div class="table-wrapper">
 							<table>