Reflect completion status by checking/unchecking the checkboxes.

[Chukuli12]

Description: Implementing the functionality to reflect completion status involves handling user interactions and updating the visual representation of checkboxes accordingly. While not overly complex, it adds an additional layer of interaction and dynamic behavior.

USER STORY: "As a user, I want the system to visually show me when a task is done. So, when I check a box, I expect the system to update and display that the task is completed."