feat: Add HTTP utility functions for trusted origin checks
feat: Implement typing status broadcasting for live chat clients and agents.
feat: Add support for signed URLs in media manager
fix: Update database migration to handle duplicate visitors with same email address.
feat: Add conversation subscription and typing message models for WebSocket communication
feat: Implement conversation subscription management in WebSocket hub this is used for broadcasting typing indicator.
feat: Revamp widget JavaScript to improve mobile responsiveness and show unread messages if any.