Module de Chat et Marketing de l'API Cloud Officielle WhatsApp pour Perfex CRM

**Version 1.6.0 **
✨ New Features
Campaigns Isolation
Each WhatsApp number can now run its own Campaigns, enabling truly isolated automation per number.

🛠 Improvements
Dashboard Refresh
Redesigned home screen with quick-action cards for common tasks.

Performance Boost
Optimized database queries and background jobs for up to 40% faster response times.

Security Hardened
Updated OAuth token handling and tightened CSRF protections.

🐞 Bug Fixes
Addressed a rare crash when uploading very large media templates.

Fixed incorrect timezone handling in scheduled campaigns on non-UTC servers.

Resolved sporadic “Permission Denied” errors during file cleanup routines.