chat: clicking the title goes back to the conversation list

Same path as the back-caret — a bigger, easier target than the
icon. No-op when already on the list.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

config.php

@@ -1,7 +1,7 @@
 <?php
 
 define('APP_NAME', 'hyprcrd');
-define('APP_VERSION', '1.9.10');
+define('APP_VERSION', '1.9.11');
 
 // Database path — writable directory, outside webroot
 // DB_PATH / UPLOAD_DIR can be pre-defined by the Electron router for app isolation