Fold the review feedback from the documents page work into the shared
components and helpers:
- Toaster: give the close control the kit's focus-visible ring, and wrap
the title/description in Toast.Content so stacked toasts get Base UI's
height measurement and overflow handling.
- TabsSkeleton: spread rest before the fixed aria-hidden so the
decorative subtree can't be exposed to assistive tech.
- DocumentsPage: reconcile the active tab against the tab the preloaded
query actually loaded with, so a tab change during the initial preload
no longer shows the wrong slice.
- Grouping: drop the duplicated bucketing helpers and reuse the shared
groupBy from @probo/helpers, keeping field-specific sorting/labeling in
the callers.
- Documents list items: extract a shared DocumentEntry row and a
useExportAndOpen hook so the three item components stop repeating the
export/access behavior while keeping their own fragments.
- Subprocessors skeleton: reuse SelectSkeleton/TextFieldSkeleton instead
of hand-rolled placeholders.
- useDocumentTab: derive DocumentTab and URL validation from a single
DOCUMENT_TABS source of truth.
Signed-off-by: Émile Ré <emile@probo.com>
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