fix(web): show artifact paths relative to the workspace

packages/util/workspace-path/src/index.ts

@@ -97,3 +97,16 @@ export function fileAddressFor(sessionId: string, cwd: string | undefined, path:
   if (root !== '' && normalized.startsWith(`${root}/`)) return sessionFileAddress(sessionId, normalized.slice(root.length + 1))
   return sessionFileAddress(sessionId, normalized)
 }
+
+/**
+ * Strip the workspace root from a workspace-rooted absolute path (display only).
+ * @param text - the path to shorten.
+ * @param cwd - session workspace root; absent or empty leaves the path unchanged.
+ * @returns the path relative to the workspace root, or unchanged when it is not rooted there.
+ */
+export function relativizeToCwd(text: string, cwd: string | undefined): string {
+  if (cwd === undefined || cwd === '') return text
+  const root = cwd.replace(/[/\\]+$/, '')
+  if (text.startsWith(`${root}/`) || text.startsWith(`${root}\\`)) return text.slice(root.length + 1)
+  return text
+}