Splits discovery eligibility from submission eligibility so blocked and quota-exhausted viewers still see the requestable section with disabled per-row CTAs, matching the documented behavior. Documents the required extensions to useRequestSearch — signal forwarding, viewer-identity-keyed cache, and invalidation on auth/profile/ settings/limit changes — so the planned 5-minute staleTime is safe and cancellation works as described. Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>