## Rationale
When a turn fails after emitting output, the partial assistant message
**is persisted** — but only the success path publishes the event
(`message-persisted`) that makes other tabs refetch. On failure, tabs
that weren't watching the live stream keep a stale transcript until
manual reload. (Error *visibility* itself already works — `stream-error`
reaches every subscribed tab — the gap is purely the
persisted-transcript sync. The original gap-analysis framing of this as
an error-visibility problem was wrong; this is the corrected scope.)
## Why this is the root cause, not a symptom patch
Turn settlement should converge subscribers regardless of *how* the turn
settled — success and failure both persist state that tabs need. The
failure path now publishes the same refetch-trigger event the rest of
the lifecycle uses, right after the terminal `stream-error`. No new
event type, no client changes: the existing guarded replay
(`firstLiveSeq === null`) already ensures tabs with a live view keep
their in-place error rendering while background tabs pick up the
persisted partial message and error state.
## User impact
Open the same thread in two tabs, have the turn die mid-answer in one:
the other tab currently shows the conversation frozen pre-turn until
reload. Now both converge to the persisted partial output plus the
failed-turn state within one refetch.
## Test plan
- [ ] CI green
- [ ] Manual: two tabs, kill the provider mid-stream in tab A → tab B
shows the partial message + error without reload
https://claude.ai/code/session_01Lyi6zTema2FMVVh8MD6c38
---
_Generated by [Claude
Code](https://claude.ai/code/session_01Lyi6zTema2FMVVh8MD6c38)_
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Félix Malfait
d1a4e250cf
