Extend useGuardrails to return the full guardrail objects plus derived
globalGuardrailNames / optionalGuardrailNames sets via React Query's
select option, instead of just an array of names. Update its existing
consumer (AddModelForm) to extract names from the new shape.
The previous shape was tailored to AddModelForm's single use case
(populate a Select with names). The team info per-guardrail opt-out
work needs default_on per guardrail to split globals from non-globals,
which the old shape couldn't provide. Consolidating into the existing
hook gives both consumers one source of truth and one React Query
cache entry instead of two parallel fetches.
- useGuardrails.ts: rewrite return type, derive global/optional sets
in select(); preserve the existing query key and auth-gate semantics
- AddModelForm.tsx: extract names from data?.guardrails.map(...)
- AddModelForm.test.tsx: update mock to return the new shape (also
fixes a pre-existing shape mismatch in the mock)
- useGuardrails.test.ts: update 3 assertions to read names via
data?.guardrails.map(...) instead of asserting against the flat array
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