feat: onboarding UX for the TUI (#8513)

ui/text/src/utils.tsx

@@ -0,0 +1,20 @@
+export function isErrorStatus(status: string): boolean {
+  return status.startsWith("error") || status.startsWith("failed");
+}
+
+export function formatError(e: unknown): string {
+  if (e instanceof Error) {
+    return e.message || e.toString();
+  }
+  if (typeof e === "string") {
+    return e;
+  }
+  if (e && typeof e === "object") {
+    try {
+      return JSON.stringify(e, null, 2);
+    } catch {
+      return String(e);
+    }
+  }
+  return String(e);
+}