update_log_5.0.1.md

# WorkersPanel 5.0.1

- Cleaned duplicate shipped code by removing the stale `header.php.bak` backup file and replacing the old `management/vehicals.php` duplicate with a single redirect shim.
- Improved rota matching so linked shifts are found more reliably from user IDs, usernames, display names, and normalised text matches.
- Tightened rota entry saving so choosing a staff member from the list auto-links the entry back to the real account.
- Improved dashboard tile and modal responsiveness for desktop, tablet, and mobile layouts.
- Expanded the integrations screen with clearer setup guidance and status messaging.