feat(workbench-ui): add practice evidence endpoint helpers

workbench-ui/src/app/trace/practiceEvidenceEndpoint.ts

@@ -0,0 +1,20 @@
+import type { PracticeEvidence } from "../../types/practiceEvidence";
+
+export function tracePracticePath(turnId: number): string {
+  return `/trace/${encodeURIComponent(String(turnId))}/practice`;
+}
+
+export async function fetchTracePracticeWith(
+  turnId: number,
+  fetcher: <T>(path: string) => Promise<T>,
+): Promise<PracticeEvidence> {
+  return fetcher<PracticeEvidence>(tracePracticePath(turnId));
+}
+
+export const TRACE_PRACTICE_LOADING_LABEL = "Loading sealed practice evidence...";
+export const TRACE_PRACTICE_EMPTY_LABEL = "No sealed practice evidence recorded for this turn.";
+export const TRACE_PRACTICE_ERROR_MUTATION_STATUS = "No trace mutation occurred.";
+
+export function tracePracticeReproducer(turnId: number): string {
+  return `curl /trace/${encodeURIComponent(String(turnId))}/practice`;
+}