- utils/breakpoints.ts: single source for 767/768/991/992; head
VISIBILITY/RESPONSIVE CSS built from it (flex-stacking rule moved from
768 to the 767 mobile boundary).
- utils/responsive-style.ts: styleTablet/styleMobile partial overrides,
cascade resolution, pure setters, scoped @media CSS per node.
- state/DeviceContext.tsx: real DeviceProvider (owns the one-time mobile
forcing from EditorShell); TopBar, overflow menu, ReportIssueModal and
Canvas read useDevice() instead of props.
- editor/RenderNode.tsx: resolves the effective style for the current
device in one place and marks overridden nodes with data-wsb-overridden.
Craft passes an opaque <DefaultRender/> to onRender, so the component
element is rebuilt with the resolved style (cloneElement cannot work).
- utils/html-export.ts: hidden nodes skipped; overrides emitted as one
body-level <style data-wsb-responsive> block + data-wsb-r scope attr;
injectAttrs skips leading <style> elements.
- test-utils/editorHarness.tsx: optional onRender/wrap options.
Refs #45
Refs #37
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>