Application Frontend 8.23.1

Save, Publish & Preview Workflow
The preview button is now gated until the creative has been published at least once. Unpublished changes show a warning dot, and tooltips display the last publish time. Toast messages guide through the save → publish → preview steps.

Preview Zoom & Pan Persistence
Zoom level and pan position in the creative preview are now preserved across block edits and preview rebuilds. They reset on explicit refresh, format change, or tab switch - meaning designers can now zoom in on a detail without preview resetting on every design change.

Standalone Mobile Preview
The standalone mobile preview now has a unified top bar with refresh button, branding logo, and a mobile/desktop toggle in developer mode. The preview should also re-fit automatically when moving the browser window between screens with different resolutions.

Preview Scrollbar & Layout
Scrollbars no longer appear on the format label list or when creative animations cause overflow. This was most visible on Windows and browsers using classic (non-overlay) scrollbars. A 1px white strip at the bottom of standalone preview is also gone.

Master Creative Device Sizes
Child creative sizes (e.g. 325×647) now appear correctly in the device dropdown when a fullscreen child exists. This was a regression from a recent preview update.