relay: suppress poll re-renders during user actions

Inbox poll continues fetching but skips DOM updates when user is typing,
deleting, or confirming. Quiet mode diffs message IDs to avoid
unnecessary re-renders. Focus/blur tracking on all inputs auto-guards.

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', '1.3.1');
+define('APP_VERSION', '1.3.2');
 
 // Database path — writable directory, outside webroot
 // DB_PATH / UPLOAD_DIR can be pre-defined by the Electron router for app isolation