test: cover UserProfileSection and AccountSection branches

UserProfileSection: four input fields render, prop hydration including
German date conversion, hidden ISO birthDate input, contact textarea
hydration, empty defaults.

AccountSection: heading, email input attributes, password input
attributes.

9 tests across two account-form helpers.

Refs #496.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

frontend/src/routes/admin/users/new/AccountSection.svelte.test.ts

@@ -0,0 +1,31 @@
+import { describe, it, expect, afterEach } from 'vitest';
+import { cleanup, render } from 'vitest-browser-svelte';
+import { page } from 'vitest/browser';
+import AccountSection from './AccountSection.svelte';
+
+afterEach(cleanup);
+
+describe('AccountSection', () => {
+	it('renders the section heading', async () => {
+		render(AccountSection, { props: {} });
+
+		await expect.element(page.getByRole('heading', { name: /benutzerverwaltung/i })).toBeVisible();
+	});
+
+	it('renders the email input as type=email and required', async () => {
+		render(AccountSection, { props: {} });
+
+		const email = document.querySelector('input[name="email"]') as HTMLInputElement;
+		expect(email.type).toBe('email');
+		expect(email.required).toBe(true);
+		expect(email.autocomplete).toBe('email');
+	});
+
+	it('renders the password input as type=password and required', async () => {
+		render(AccountSection, { props: {} });
+
+		const pwd = document.querySelector('input[name="password"]') as HTMLInputElement;
+		expect(pwd.type).toBe('password');
+		expect(pwd.required).toBe(true);
+	});
+});