feat(recipes): add IngredientList component (read-only)

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

frontend/src/lib/recipes/IngredientList.svelte

@@ -0,0 +1,32 @@
+<script lang="ts">
+	type Ingredient = {
+		ingredientId?: string;
+		name?: string;
+		quantity?: number;
+		unit?: string;
+		sortOrder?: number;
+	};
+
+	let { ingredients }: { ingredients: Ingredient[] } = $props();
+</script>
+
+<section>
+	<h2
+		class="text-[12px] font-medium font-sans tracking-[0.08em] uppercase text-[var(--color-text-muted)] mb-[16px]"
+	>
+		Zutaten
+	</h2>
+
+	<ul>
+		{#each ingredients as ingredient (ingredient.ingredientId ?? ingredient.name)}
+			<li class="flex items-baseline gap-[12px] py-[8px] border-b border-[var(--color-border)] last:border-b-0">
+				{#if ingredient.quantity != null}
+					<span class="text-[13px] font-medium text-[var(--color-text)] w-[80px] shrink-0">
+						{ingredient.quantity}{ingredient.unit != null ? ` ${ingredient.unit}` : ''}
+					</span>
+				{/if}
+				<span class="text-[14px] text-[var(--color-text)]">{ingredient.name}</span>
+			</li>
+		{/each}
+	</ul>
+</section>

frontend/src/lib/recipes/IngredientList.test.ts

@@ -0,0 +1,44 @@
+import { describe, it, expect } from 'vitest';
+import { render, screen } from '@testing-library/svelte';
+import IngredientList from './IngredientList.svelte';
+
+const mockIngredients = [
+	{ ingredientId: 'i1', name: 'Spaghetti', quantity: 200, unit: 'g' },
+	{ ingredientId: 'i2', name: 'Hackfleisch', quantity: 400, unit: 'g' },
+	{ ingredientId: 'i3', name: 'Salz', quantity: undefined, unit: undefined }
+];
+
+describe('IngredientList', () => {
+	it('renders the section heading', () => {
+		render(IngredientList, { props: { ingredients: mockIngredients } });
+		expect(screen.getByText(/zutaten/i)).toBeInTheDocument();
+	});
+
+	it('renders a row for each ingredient', () => {
+		render(IngredientList, { props: { ingredients: mockIngredients } });
+		expect(screen.getByText('Spaghetti')).toBeInTheDocument();
+		expect(screen.getByText('Hackfleisch')).toBeInTheDocument();
+		expect(screen.getByText('Salz')).toBeInTheDocument();
+	});
+
+	it('renders quantity and unit when present', () => {
+		render(IngredientList, { props: { ingredients: mockIngredients } });
+		expect(screen.getByText('200 g')).toBeInTheDocument();
+		expect(screen.getByText('400 g')).toBeInTheDocument();
+	});
+
+	it('renders no quantity when not present', () => {
+		render(IngredientList, { props: { ingredients: mockIngredients } });
+		expect(screen.queryByText('undefined')).not.toBeInTheDocument();
+	});
+
+	it('has no remove buttons (read-only)', () => {
+		render(IngredientList, { props: { ingredients: mockIngredients } });
+		expect(screen.queryByRole('button')).not.toBeInTheDocument();
+	});
+
+	it('renders empty state when ingredients array is empty', () => {
+		render(IngredientList, { props: { ingredients: [] } });
+		expect(screen.getByText(/zutaten/i)).toBeInTheDocument();
+	});
+});