Let a dashboard be read against runs instead of the live engine

frontend/src/components/Runs/MetricChart.tsx

@@ -9,17 +9,12 @@ import {
   SelectTrigger,
   SelectValue,
 } from "@/components/ui/select"
-import { compareQueryOptions, runMetricsQueryOptions, shortId } from "./queries"
-
-/**
- * Why a finished run can have nothing to draw.
- *
- * A cache hit restores what a node returned, not the values it emitted along
- * the way, so a run whose training node was reused has a result and no curve.
- * Said here rather than left as an empty chart, which reads as a fault.
- */
-export const NO_CURVE =
-  "No curve was recorded. A node restored from the cache replays no emissions, so a run that reused an earlier one draws nothing here — its outputs are still on the result."
+import {
+  compareQueryOptions,
+  NO_CURVE,
+  runMetricsQueryOptions,
+  shortId,
+} from "./queries"
 
 /** The metrics one run recorded, in the order they are worth offering. */
 export function useMetricNames(runId: string | undefined) {