In the transparent stream, terminal output and patch diffs intermittently
vanished after a cold/paginated reload. A settled tool row renders its body from
`snippet`, but the raw-assistant-envelope 'derived' rebuild only joined the
result by tool id via resultsByTid (role:tool messages); when that join missed
(id mismatch, recovery-rebuilt turn) the snippet was empty, and #4622's live
enrichment only helps when S.toolCalls still matches (empty on cold load).
Build a persistedSnippetByTid lookup from the durable session.tool_calls compact
summary (which carries a bounded result snippet per tid) and use it as a
fallback in all three derived-push sites, so the persisted record is the
reliable source and the live join becomes a fast-path, not the only path that
shows the body. Part of #4925.
nesquena-hermes
dad0a3554d
