feat: enhance push notification management and error handling

- Implemented error handling for unhandled promise rejections related to message channels, improving stability during push notification operations.
- Updated the PushNotificationManager component to manage push subscription registration with timeouts, preventing application hangs.
- Enhanced the sidebar and chat components to display user avatars, improving user experience and visual consistency.
- Refactored email processing logic to support scheduled email sending, integrating new backend functionalities for better email management.
- Improved overall error handling and logging across components to reduce console spam and enhance debugging capabilities.

packages/backend/convex/actions/utils/nodeCrypto.ts

@@ -1,4 +1,5 @@
 "use node";
+
 /**
  * Utilitários de criptografia compatíveis com Node.js
  * Para uso em actions que rodam em ambiente Node.js