feat(staples): add staples page with onboarding and settings layouts

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

frontend/src/routes/household/staples/+page.svelte

@@ -2,6 +2,44 @@
 	<title>Vorräte einrichten — Mealplan</title>
 </svelte:head>
 
-<div class="flex min-h-screen items-center justify-center bg-[var(--color-page)]">
-	<p class="text-[var(--color-text-muted)]">A3 — Vorräte einrichten (coming soon)</p>
-</div>
+<script lang="ts">
+	import ProgressSidebar from '$lib/components/ProgressSidebar.svelte';
+	import StaplesManager from '$lib/onboarding/StaplesManager.svelte';
+
+	type Category = { id: string; name: string; ingredients: { id: string; name: string; isStaple: boolean }[] };
+
+	let { data, ctx }: { data: { categories: Category[] }; ctx?: string } = $props();
+
+	const isOnboarding = $derived(ctx === 'onboarding');
+</script>
+
+{#if isOnboarding}
+	<div class="flex min-h-screen bg-[var(--color-page)]">
+		<!-- Desktop sidebar -->
+		<aside class="hidden md:flex w-[300px] flex-shrink-0 flex-col bg-[var(--color-surface)] border-r border-[var(--color-border)] p-[40px_28px]">
+			<ProgressSidebar currentStep={2} />
+		</aside>
+
+		<!-- Main area -->
+		<main class="flex flex-1 flex-col">
+			<!-- Mobile step indicator -->
+			<p class="md:hidden px-6 pt-6 text-sm text-[var(--color-text-muted)]">Schritt 2 von 3</p>
+
+			<!-- Content -->
+			<div class="flex-1 p-6">
+				<StaplesManager categories={data.categories} context="onboarding" />
+			</div>
+
+			<!-- Footer navigation -->
+			<div class="flex justify-between p-6">
+				<a href="/planner">Überspringen</a>
+				<a href="/household/invite">Weiter</a>
+			</div>
+		</main>
+	</div>
+{:else}
+	<div class="flex min-h-screen flex-col bg-[var(--color-page)]">
+		<h1>Vorräte</h1>
+		<StaplesManager categories={data.categories} context="settings" />
+	</div>
+{/if}

frontend/src/routes/household/staples/page.test.ts

@@ -0,0 +1,86 @@
+import { describe, it, expect, vi, beforeEach, afterEach } from 'vitest';
+import { render, screen } from '@testing-library/svelte';
+import Page from './+page.svelte';
+
+vi.mock('$app/state', () => ({
+	page: { url: { searchParams: { get: vi.fn() } } }
+}));
+
+const mockCategories = [
+	{
+		id: 'cat-1',
+		name: 'Öle & Fette',
+		ingredients: [
+			{ id: 'ing-1', name: 'Olivenöl', isStaple: true },
+			{ id: 'ing-2', name: 'Butter', isStaple: false }
+		]
+	}
+];
+
+describe('staples page — onboarding context (?ctx=onboarding)', () => {
+	beforeEach(() => {
+		vi.stubGlobal('fetch', vi.fn().mockResolvedValue({ ok: true }));
+	});
+
+	afterEach(() => {
+		vi.unstubAllGlobals();
+	});
+
+	it('renders ProgressSidebar with step 2 active', () => {
+		render(Page, { props: { data: { categories: mockCategories }, ctx: 'onboarding' } });
+		expect(screen.getByTestId('step-2')).toHaveAttribute('aria-current', 'step');
+	});
+
+	it('renders Continue button linking to /household/invite', () => {
+		render(Page, { props: { data: { categories: mockCategories }, ctx: 'onboarding' } });
+		const continueLink = screen.getByRole('link', { name: /weiter/i });
+		expect(continueLink).toHaveAttribute('href', '/household/invite');
+	});
+
+	it('renders Skip button linking to /planner', () => {
+		render(Page, { props: { data: { categories: mockCategories }, ctx: 'onboarding' } });
+		const skipLink = screen.getByRole('link', { name: /überspringen/i });
+		expect(skipLink).toHaveAttribute('href', '/planner');
+	});
+
+	it('renders the StaplesManager with categories', () => {
+		render(Page, { props: { data: { categories: mockCategories }, ctx: 'onboarding' } });
+		expect(screen.getByText('Öle & Fette')).toBeInTheDocument();
+	});
+
+	it('sets the page title', () => {
+		render(Page, { props: { data: { categories: mockCategories }, ctx: 'onboarding' } });
+		expect(document.title).toBe('Vorräte einrichten — Mealplan');
+	});
+
+	it('renders mobile step indicator Schritt 2 von 3', () => {
+		render(Page, { props: { data: { categories: mockCategories }, ctx: 'onboarding' } });
+		expect(screen.getByText(/schritt 2 von 3/i)).toBeInTheDocument();
+	});
+});
+
+describe('staples page — settings context (no ctx)', () => {
+	beforeEach(() => {
+		vi.stubGlobal('fetch', vi.fn().mockResolvedValue({ ok: true }));
+	});
+
+	afterEach(() => {
+		vi.unstubAllGlobals();
+	});
+
+	it('does not render ProgressSidebar', () => {
+		render(Page, { props: { data: { categories: mockCategories } } });
+		expect(screen.queryByTestId('step-1')).not.toBeInTheDocument();
+	});
+
+	it('does not render Continue or Skip buttons', () => {
+		render(Page, { props: { data: { categories: mockCategories } } });
+		expect(screen.queryByRole('link', { name: /weiter/i })).not.toBeInTheDocument();
+		expect(screen.queryByRole('link', { name: /überspringen/i })).not.toBeInTheDocument();
+	});
+
+	it('renders a settings heading', () => {
+		render(Page, { props: { data: { categories: mockCategories } } });
+		expect(screen.getByRole('heading', { name: /vorräte/i })).toBeInTheDocument();
+	});
+});