T-718: unify state, completion, close and reopen with explicit CAS and operation receipts; keep MR integration proofs independent. Queue only the explicitly selected Ticket and fence target edits against active Worker grants. Align REST, Worker/WIP, evidence projection and generated contracts.
Validation: root cargo check; full ticket, merge-request, client, worker, yoi-workspace-server and server-api tests; server-api typescript feature; OpenAPI and six generated API checkers; Svelte check and 36 narrow Web tests; fmt and diff checks.
Hare