axiom-tui

Create a fully-functional mini-application called 'NoteMaster' using the 'axiom-tui' package. NoteMaster should be a simple yet powerful note-taking tool designed specifically for command-line users who prefer a text-based interface over graphical ones. It should allow users to create, edit, delete, and organize notes within a structured directory system.

The application must include the following core functionalities:
1. User Authentication: Implement a basic login system where users can sign up, log in, and log out of their accounts.
2. Note Management: Users should be able to create new notes, edit existing ones, and delete unwanted notes.
3. Directory Structure: Notes should be organized into directories, allowing users to categorize their notes under different topics or projects.
4. Search Functionality: Implement a search function that allows users to find notes based on keywords or tags.
5. Backup and Restore: Users should have the option to back up their entire note collection to a specified location and restore it later.
6. Export Notes: Allow users to export their notes as plain text files or markdown files.

Suggested Features:
- Tagging System: Enable users to tag their notes for better organization and easy searching.
- Version Control: Keep track of changes made to each note and allow users to revert to previous versions.
- Collaborative Editing: Implement a feature that allows multiple users to edit the same note simultaneously.

Utilize the 'axiom-tui' package to build the user interface for NoteMaster. This includes designing the layout, handling user inputs, and displaying output in a clean and intuitive manner. Leverage the power of Textual to ensure that the UI is responsive, interactive, and visually appealing. Additionally, explore how you can integrate advanced Textual components such as dropdown menus, file dialogs, and more sophisticated input/output controls to enhance the user experience.