SUB: Add a button connected to the sorting function

[shgxshg]

linked to user story #5
Acceptance criteria: The task will be complete when a button is added to the user interface, connected to the sorting function, allowing users to sort discussions based on specified criteria (e.g., newest, oldest), and ensuring it functions properly and updates the displayed posts accordingly.

Dependencies:
Need to understand codebase and find the file where the frontend can be manipulated to add button. No other major dependencies.

Estimated Effort:
The estimated effort for this task is 5 hours, focusing on frontend development. The task involves designing the button, integrating it with the existing sorting logic, and ensuring it functions correctly with real-time post updates. This task is expected to take around 1 day to complete.