Two fixes via one workspace command:
1. Gates 5 standard command menu items behind `pageType == "INDEX_PAGE"`
--
`importRecords`, `exportView`, `seeDeletedRecords`, `createNewView`,
`hideDeletedRecords`. They currently appear (and crash or do nothing) on
RECORD_PAGE.
2. Fixes Edit Layout missing from older workspaces -- root cause is
`conditionalAvailabilityExpression` drift between source-of-truth
constants
and the workspace DB (e.g. #20556 removed a feature flag from the
expression
without syncing existing workspaces).
The 2-6 workspace command iterates all `STANDARD_COMMAND_MENU_ITEMS` and
reconciles any `conditionalAvailabilityExpression` that differs from the
constant. Idempotent -- already-correct rows are skipped.
Deferred: `deleteRecords` doesn't refetch the current record after
deletion
on RECORD_PAGE (mutation fires but UI shows stale state until refresh)
--
different fix shape (frontend handler), separate PR.
