Textual Event and Message Handling Purpose Implement robust event handling and inter-widget communication in Textual using messages, keyboard bindings, and action dispatch. Messages enable loose coupling between components. Quick Start Instructions Step 1: Define Custom Messages Create message classes to communicate between widgets: Message Conventions: - Subclass - Define immutable data in - Use descriptive PascalCase names - Document the message purpose in docstring - Use for dataclasses to ensure immutability Step 2: Post and Handle Messages Post messages from widgets and handle in parents…