refactor: align frontend ownership boundaries

Close audit gaps across API drift, query policy, UI, and tests.

src/features/auth/ui/AuthForm.test.tsx

@@ -1,18 +1,10 @@
 import { MantineProvider } from "@mantine/core";
-import {
-	cleanup,
-	fireEvent,
-	render,
-	screen,
-	waitFor,
-} from "@testing-library/react";
+import { fireEvent, render, screen, waitFor } from "@testing-library/react";
 import { MemoryRouter } from "react-router";
-import { afterEach, describe, expect, it, vi } from "vitest";
+import { describe, expect, it, vi } from "vitest";
 import { AuthForm } from "./AuthForm";
 
 describe("AuthForm", () => {
-	afterEach(cleanup);
-
 	it("does not submit registration when password confirmation differs", async () => {
 		const onSubmit = vi.fn();
 		render(