Editor-package side of the hosted editor UI pass:
- Add `workspaceMode` ('edit' | 'studio') to `useEditor`. Studio forces a
3D-only view, clears selection, and the canvas hides the bottom action bar,
inspector, selection manager, handles and tools (kept level selector, view
toggles and camera toolbars).
- Inspector panel (`PanelWrapper`): collapses to its header by default with a
single-click toggle, is draggable from the header via a centered grip, and is
clamped to the viewer column (`data-viewer-bounds`) so it can't slide under
the sidebar or top bar.
- Lower the floating action menu / building menu / arrow-handle `zIndexRange`
below the chrome overlay so the inspector sits above scene HTML helpers.
- Merge the bottom bar's separate Scans + Guides toggles into a single
References split-button + popover with per-type sections.
- Export `WorkspaceMode`.
Co-authored-by: Claude Opus 4.8 <noreply@anthropic.com>
