Study Header Improvements

The Study Header experience has been improved with a focus on better responsiveness, easier long-term maintenance, and overall usability across the different workflows researchers rely on it for. As part of this same update, key study management actions available through the header have been refined and streamlined, rather than being left scattered or inconsistent across different parts of the interface.

The result is a more stable and consistent experience specifically while navigating between different parts of a study, editing its contents, previewing how it will appear to participants, and publishing it once it's ready to go live. These are the core actions researchers depend on the Study Header for throughout the life of a project, and this update is focused on making all of them feel more dependable and predictable to use.