Movies & TV: arrows and drag to slide rows (no scrollbar needed), Trailer button (Plex extras, else a YouTube search)

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

public/index.html

@@ -82,6 +82,7 @@
 <script src="/mail.js"></script>
 <script src="/share.js"></script>
 <script src="/cast.js"></script>
+<script src="/rows.js"></script>
 <script src="/keys.js"></script>
 <script src="/boot.js"></script>
 <script src="/shell.js"></script>