Blog: Meet Horizon UI 6/16 — The Trace Explorer (#865)

Part 6 of the Meet Horizon UI series: the per-layer Traces tab — a triage-first, run-on-demand trace explorer with structured conditions (no TraceQL), a duration-Distribution chart you box-select, three lenses (Default waterfall / Tree / Statistics), the span detail panel, and a Zipkin tab beside the native one. 5 WebP figures (explorer, waterfall, tree, Zipkin tab, Zipkin span). Render-verified against apps/ui/src/layer/traces + docs/operate/traces.md. Tags: Tracing, Cloud Native.