SplitPane, TabBar, MetadataTable, DigestBadge, Timestamp, SearchInput.
All token-driven, keyboard-navigable, ARIA-accessible, dark theme,
motion-respectful. No new dependencies — TabBar uses native ARIA
semantics instead of @radix-ui/react-tabs.
PreviewPage updated with all six components in representative states.
Section 1C checked off in wave-1-evidence-spine.md.
Append-only JSONL journal records the exact ChatTurnResult envelope returned by /chat/turn with stable turn_id, trace_hash, all three surfaces, verdicts, and deterministic journal_digest.
GET /trace/turns and GET /trace/{turn_id} serve journal evidence for the Trace route frontend. Read model only; no teaching, pack, or journal-owned engine_state mutation.
