Index: src/routes/prutter.js
===================================================================
--- src/routes/prutter.js	(revision 8aa85d06c34d1b16a4f9440e4c87fac432d0cf6e)
+++ src/routes/prutter.js	(revision 903f10bb52d81b6011b7c71d31a4a4f454be0449)
@@ -112,5 +112,7 @@
   renderPage(req, res, 'pages/prutter-conversation', {
     pageTitle: 'Prutter — ' + (other?.username || ''),
-    bodyClass: 'on-special',
+    // on-chat → full-height chat-view (geen artiest-profielkop, alleen de thread
+    // scrollt). Zie chrome.ejs (_headerless) + de page-CSS hieronder.
+    bodyClass: 'on-special on-chat',
     conversation: conv,
     other,