Complete Promptkit batch execution cutover

internal/app/test_helpers_test.go

@@ -0,0 +1,21 @@
+package app
+
+import (
+	"testing"
+	"time"
+)
+
+func mustParse(value string) time.Time {
+	parsed, err := time.Parse(time.RFC3339, value)
+	if err != nil {
+		panic(err)
+	}
+	return parsed
+}
+
+func requireNoError(t *testing.T, err error) {
+	t.Helper()
+	if err != nil {
+		t.Fatal(err)
+	}
+}