The live suite previously called appendMidTurnUserMessage directly, leaving
redirectPrompt's appendAfterActiveReply guard — the production decision of
WHERE a correction lands — outside the harness. Both hooks now mount together
sharing one state map, exactly as the desktop wires them, so a regression in
the caller (not just the insert) goes red. Verified by mutation: disabling the
guard fails 2/4.
Also covers the rejected-redirect path: a not_running response discards the
optimistic bubble instead of stranding a correction the model never saw.
The hydration fixture now carries the durable row shape the client actually
receives (row_id, reasoning, provider call_id/response_item_id on tool_calls)
instead of a hand-simplified echo, so the 'mirrors real state.db rows' claim
is honest. The fake-timer steer id counter is gone with the local insert —
ids come from redirectPrompt itself.
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