Refactor: Replace inline onclick with addEventListener for better event handling

[pyob-bot]

Summary of Changes

This PR updates the dashboard_html.py file by refactoring the method of binding event handlers to the 'move up' button in the HTML document. Specifically, the inline onclick attribute is replaced with the addEventListener method for better adherence to best practices in JavaScript event handling.

Technical Impact

Improved Event Handling

• Consistency: Using addEventListener aligns with modern JavaScript practices for handling events. This method allows for multiple event listeners on the same element, which can be beneficial for extending functionality in the future.
• Flexibility: Event listeners added with addEventListener can be removed or altered without directly modifying the HTML structure, thus promoting cleaner code separation.

Compatibility

• The change affects only the manner in which events are handled within JavaScript code, ensuring compatibility as long as modern JavaScript environments are supported.

Code Maintainability

• Future enhancements can easily add more listeners as needed, without altering existing ones. This improves maintainability by allowing the addition of new handlers without affecting already established ones.

No Side Effects

There are no expected performance impacts or side effects to existing functionality due to this change as the same handler is invoked with the same event target.