Replace blanket no-mutation language with the admitted-corridor rule: ADR-governed path, visible preconditions, auditable telemetry, and replay evidence before action.
Math ratification is documented as the first admitted proposal corridor. Corpus, pack, workflow, arbitrary file, and unadmitted proposal mutation remain forbidden.
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.
