Wrap RT and SOC form cards in a responsive 2-column grid
(grid gap-xl lg:grid-cols-2 items-start) on the simulation edit view.
Drop the max-w-3xl constraint from the outer container so the grid
can use full page width (matching EngagementDetailPage). Header,
banners, submitError, and sticky action bar remain full-width above
the grid. The isNew create form keeps its current narrow layout.
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>