Fix UTF-8 BOM causing garbled output above <nav> in admin pages
admin_dashboard.php, config.php, and edit_application.php were saved with a
UTF-8 BOM (EF BB BF). PHP outputs those 3 bytes before any HTML, which the
browser interprets as body content — pushing <head> empty and everything else
into <body>. Stripped BOM from all three files.
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>