test(admin/users): cover the user-edit page branches

Heading with email, three card sections (profile/groups/password),
success vs error form banners, group preselection from editUser.groups,
cancel link, delete button. Mocks the confirm service.

7 tests, ~25 branches.

Refs #496.

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

frontend/src/routes/admin/users/[id]/page.svelte.test.ts

@@ -0,0 +1,87 @@
+import { describe, it, expect, vi, afterEach } from 'vitest';
+import { cleanup, render } from 'vitest-browser-svelte';
+import { page } from 'vitest/browser';
+
+vi.mock('$lib/shared/services/confirm.svelte', () => ({
+	getConfirmService: () => ({ confirm: async () => false })
+}));
+vi.mock('$lib/shared/services/confirm.svelte.js', () => ({
+	getConfirmService: () => ({ confirm: async () => false })
+}));
+
+const { default: AdminUserEditPage } = await import('./+page.svelte');
+
+afterEach(cleanup);
+
+const baseEditUser = {
+	id: 'u1',
+	firstName: 'Anna',
+	lastName: 'Schmidt',
+	email: 'anna@example.com',
+	birthDate: '',
+	contact: '',
+	groups: [{ id: 'g1' }, { id: 'g2' }]
+};
+
+const baseData = (overrides: Record<string, unknown> = {}) => ({
+	editUser: baseEditUser,
+	groups: [
+		{ id: 'g1', name: 'Familie' },
+		{ id: 'g2', name: 'Admins' },
+		{ id: 'g3', name: 'Gäste' }
+	],
+	...overrides
+});
+
+describe('admin/users/[id] page', () => {
+	it('renders the edit heading with the user email', async () => {
+		render(AdminUserEditPage, { props: { data: baseData(), form: undefined } });
+
+		await expect.element(page.getByRole('heading', { name: /anna@example/i })).toBeVisible();
+	});
+
+	it('renders all three card sections', async () => {
+		render(AdminUserEditPage, { props: { data: baseData(), form: undefined } });
+
+		await expect.element(page.getByRole('heading', { name: /persönliche daten/i })).toBeVisible();
+		await expect.element(page.getByRole('heading', { name: /^gruppen$/i })).toBeVisible();
+		await expect.element(page.getByRole('heading', { name: /neues passwort/i })).toBeVisible();
+	});
+
+	it('shows the update success banner when form.success is true', async () => {
+		render(AdminUserEditPage, { props: { data: baseData(), form: { success: true } } });
+
+		await expect.element(page.getByText('Änderungen gespeichert.')).toBeVisible();
+	});
+
+	it('shows the update error banner when form.error is set', async () => {
+		render(AdminUserEditPage, {
+			props: { data: baseData(), form: { error: 'E-Mail bereits vergeben' } }
+		});
+
+		await expect.element(page.getByText('E-Mail bereits vergeben')).toBeVisible();
+	});
+
+	it('preselects the user groups in UserGroupsSection', async () => {
+		render(AdminUserEditPage, { props: { data: baseData(), form: undefined } });
+
+		const checkboxes = Array.from(
+			document.querySelectorAll('input[name="groupIds"]')
+		) as HTMLInputElement[];
+		const checked = checkboxes.filter((c) => c.checked).map((c) => c.value);
+		expect(checked.sort()).toEqual(['g1', 'g2']);
+	});
+
+	it('renders cancel link to /admin/users', async () => {
+		render(AdminUserEditPage, { props: { data: baseData(), form: undefined } });
+
+		const cancel = document.querySelector('a[href="/admin/users"]');
+		expect(cancel).not.toBeNull();
+	});
+
+	it('renders the delete button', async () => {
+		render(AdminUserEditPage, { props: { data: baseData(), form: undefined } });
+
+		await expect.element(page.getByRole('button', { name: /löschen/i })).toBeVisible();
+	});
+});