Full Screen, Reload & Device Preview Disabled in AI Studio – Request to Restore

I recently noticed that the Full Screen, Reload, and Device Preview options in Google AI Studio (Build / Preview view) are disabled or missing. These controls were previously available and working, but now they appear greyed out or removed, which significantly impacts usability while testing layouts and previews. This change feels like a regression in functionality rather than an improvement. These options are essential for efficient development workflows and should be restored as soon as possible, as browser-level workarounds are not a real substitute for native functionality. Multiple users seem to be affected, and bringing these features back would greatly improve the developer experience.