The renderer's session-state cache is memory-only and the backend's
inflight snapshot dies with the backend process, so nothing survived a
full app or machine death mid-turn: reopening the session showed the
transcript up to the last committed turn and silently dropped everything
the crashed turn had streamed.
While a turn runs, the visible tail (user prompt + streamed assistant
rows, tool calls included) is now journaled to localStorage — throttled
off the delta-flush hot path, bounded (24 entries / 7 days), cleared the
moment the turn settles. Session resume folds the journaled tail back
onto the restored transcript. When the backend also has a live text-only
inflight projection for the same turn, the journal overlays its richer
structure onto that row (longer text wins, base row id kept so live
deltas keep landing) instead of treating it as caught up — the ordering
defect that dropped locally recorded tool progress in the original PR.
Co-authored-by: Omar Baradei <omar@kostudios.io>
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