Bug: Previous/Next buttons do not change the description and the dropdown/image in sync

Bug description and expected behavior

A clear and concise description of what the bug is, and what you expected to happen.

The Previous and Next buttons below the bone viewing interface do not function as expected. They have an immediate effect on the description being displayed, but do not switch the dropdown or the image to the correct options to match.

https://github.com/user-attachments/assets/19ef902f-70ff-49eb-9db6-7babfffda45b

Steps to reproduce

A list of steps it takes to see this bug.

1. Select a boneset from the dropdown.
2. Select a bone from the dropdown.
3. (Optional) Select a sub-bone from the dropdown.
4. Click the Next and Previous buttons. Observe which of the description, image, and dropdown options change and observe that they do not match each other.

Acceptance Criteria

A checklist of conditions that must be met for this task to be considered complete. How will we verify that it's done correctly?

• The buggy behavior no longer occurs.
• All related code passes the repository's workflow checks (linting, tests).
• The application runs without new errors after the changes are made.
• (If applicable) New automated tests have been added to cover the changes.

Additional context

Add any other context or screenshots about the bug here.

Start by running the application and reproducing the issue in the bone viewing interface using the listed dropdown and Previous/Next steps. Trace how those controls update the description, image, and dropdown state; the bug is resolved when all three remain synchronized and the repository workflow checks pass.