The /health endpoint was the only W-026 API route with no UI consumer.
Surface it as a liveness indicator (colored dot + label) in the status
footer, isolated from /runtime/status so a live server still reads
"Healthy" even when runtime status is degraded.
- types: HealthStatus matching the server's {"status":"ok"} payload
- client: fetchHealth() with a short 3s timeout for fast failure
- queries: useHealth() polling every 15s, retry disabled
- footer: HealthIndicator rendered in both normal and degraded branches;
any non-ok status fails safe to "Unhealthy"
- tests: healthy / errored / non-ok / checking / survives-runtime-failure
Two UX wrinkles surfaced while exercising the CORE-Logos Studio:
- DAG viewport: tall, few-layer graphs (e.g. the 408x1890, 2-layer/55-node
alignment fan) were squished by viewBox-meet into an unreadable sliver. Render
at natural height (scale ~1) inside a bounded, scrollable box; small graphs are
unaffected (>= the caller height). Golden layout unchanged (layoutDag untouched).
- Click-to-copy: new shared useCopyToClipboard hook gives every copy affordance a
tooltip + transient confirmation. StatusFooter SHA now confirms 'Copied' (was a
silent copy that read as 'does nothing'); 'Read Only' is labeled a non-interactive
status (not a toggle); checkpoint-revision gains an explanatory tooltip.
DigestBadge + MetadataTable copy buttons route through the hook + gain titles.
Full workbench-ui vitest: 520 passed (+4), clean exit; tsc + build clean.
