chore: catch up Storybook preview, coverage, and story hygiene

Stories were throwing without AuthModal/CreateFlow providers, autodocs was a no-op, and several DS/create-flow screens had no stories.

stories/pages/CoreValuesPage.stories.js

@@ -0,0 +1,9 @@
+import { CoreValuesSelectScreen } from "../../app/(app)/create/screens/select/CoreValuesSelectScreen";
+
+export default {
+  title: "Pages/Create Flow/Core values",
+  component: CoreValuesSelectScreen,
+  parameters: { layout: "fullscreen" },
+};
+
+export const Default = {};