feat(planner): add RecipePickerDrawer slide-in drawer

Wraps RecipePicker in a fixed right-side drawer with backdrop.
Slide-in/out transition, backdrop click closes, purely presentational
(open + onclose props from parent).

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

frontend/src/lib/planner/RecipePickerDrawer.svelte

@@ -0,0 +1,77 @@
+<script lang="ts">
+	import type { Recipe, Suggestion } from '$lib/planner/types';
+	import RecipePicker from './RecipePicker.svelte';
+
+	let {
+		open,
+		slotDate,
+		planId,
+		suggestions,
+		allRecipes,
+		isLoading,
+		onpick,
+		onclose,
+		excludeRecipeId,
+		replacingRecipe
+	}: {
+		open: boolean;
+		slotDate: string;
+		planId: string;
+		suggestions: Suggestion[];
+		allRecipes: Recipe[];
+		isLoading: boolean;
+		onpick: (recipeId: string, recipeName: string) => void;
+		onclose: () => void;
+		excludeRecipeId?: string;
+		replacingRecipe?: { name: string; meta?: string };
+	} = $props();
+
+	let drawerTransform = $derived(open ? 'translateX(0)' : 'translateX(100%)');
+	let backdropVisibility = $derived(open ? 'visible' : 'hidden');
+	let backdropOpacity = $derived(open ? '1' : '0');
+</script>
+
+<!-- Backdrop -->
+<div
+	data-testid="drawer-backdrop"
+	aria-hidden="true"
+	onclick={onclose}
+	style="position: fixed; inset: 0; background: rgba(0,0,0,0.3); z-index: 40; visibility: {backdropVisibility}; opacity: {backdropOpacity}; transition: opacity 0.2s, visibility 0.2s;"
+></div>
+
+<!-- Drawer panel -->
+<div
+	data-testid="recipe-picker-drawer"
+	aria-hidden={!open}
+	style="position: fixed; right: 0; top: 0; height: 100%; width: min(480px, 90vw); background: var(--color-page); border-left: 1px solid var(--color-border); z-index: 50; transform: {drawerTransform}; transition: transform 0.25s ease; display: flex; flex-direction: column;"
+>
+	<!-- Header -->
+	<div style="display: flex; align-items: center; justify-content: space-between; padding: 12px 16px; border-bottom: 1px solid var(--color-border); flex-shrink: 0;">
+		<p style="margin: 0; font-family: var(--font-display); font-size: 15px; font-weight: 500; color: var(--color-text);">
+			Rezept wählen
+		</p>
+		<button
+			type="button"
+			aria-label="Schließen"
+			onclick={onclose}
+			style="background: none; border: none; cursor: pointer; font-size: 20px; line-height: 1; color: var(--color-text-muted); padding: 4px 8px;"
+		>
+			&times;
+		</button>
+	</div>
+
+	<!-- RecipePicker content -->
+	<div style="overflow-y: auto; flex: 1;">
+		<RecipePicker
+			{planId}
+			date={slotDate}
+			dateLabel={slotDate}
+			{suggestions}
+			{allRecipes}
+			{isLoading}
+			{onpick}
+			{excludeRecipeId}
+			{replacingRecipe}
+		/>
+	</div>
+</div>

frontend/src/lib/planner/RecipePickerDrawer.test.ts

@@ -0,0 +1,80 @@
+import { describe, it, expect, vi } from 'vitest';
+import { render, screen } from '@testing-library/svelte';
+import { userEvent } from '@testing-library/user-event';
+import RecipePickerDrawer from './RecipePickerDrawer.svelte';
+
+const baseProps = {
+	open: true,
+	slotDate: '2026-04-14',
+	planId: 'plan-1',
+	suggestions: [],
+	allRecipes: [
+		{ id: 'r1', name: 'Pasta Bolognese', cookTimeMin: 45, effort: 'mittel' },
+		{ id: 'r2', name: 'Lachs', cookTimeMin: 20, effort: 'einfach' }
+	],
+	isLoading: false,
+	onpick: vi.fn(),
+	onclose: vi.fn()
+};
+
+describe('RecipePickerDrawer', () => {
+	describe('visibility', () => {
+		it('renders drawer content when open=true', () => {
+			render(RecipePickerDrawer, { props: baseProps });
+			expect(screen.getByTestId('recipe-picker-drawer')).toBeTruthy();
+		});
+
+		it('drawer is not visible when open=false', () => {
+			render(RecipePickerDrawer, { props: { ...baseProps, open: false } });
+			const drawer = screen.getByTestId('recipe-picker-drawer');
+			// Drawer exists in DOM but should be off-screen / aria-hidden
+			expect(drawer.getAttribute('aria-hidden')).toBe('true');
+		});
+
+		it('renders recipe list inside drawer', () => {
+			render(RecipePickerDrawer, { props: baseProps });
+			expect(screen.getByText('Pasta Bolognese')).toBeTruthy();
+		});
+	});
+
+	describe('backdrop', () => {
+		it('renders backdrop when open', () => {
+			render(RecipePickerDrawer, { props: baseProps });
+			expect(screen.getByTestId('drawer-backdrop')).toBeTruthy();
+		});
+
+		it('calls onclose when backdrop is clicked', async () => {
+			const onclose = vi.fn();
+			const user = userEvent.setup();
+			render(RecipePickerDrawer, { props: { ...baseProps, onclose } });
+			await user.click(screen.getByTestId('drawer-backdrop'));
+			expect(onclose).toHaveBeenCalledOnce();
+		});
+	});
+
+	describe('close button', () => {
+		it('renders a close button inside the drawer', () => {
+			render(RecipePickerDrawer, { props: baseProps });
+			expect(screen.getByRole('button', { name: /schließen|close/i })).toBeTruthy();
+		});
+
+		it('calls onclose when close button clicked', async () => {
+			const onclose = vi.fn();
+			const user = userEvent.setup();
+			render(RecipePickerDrawer, { props: { ...baseProps, onclose } });
+			await user.click(screen.getByRole('button', { name: /schließen|close/i }));
+			expect(onclose).toHaveBeenCalledOnce();
+		});
+	});
+
+	describe('recipe picking', () => {
+		it('calls onpick when a recipe is selected', async () => {
+			const onpick = vi.fn();
+			const user = userEvent.setup();
+			render(RecipePickerDrawer, { props: { ...baseProps, onpick } });
+			const pickButtons = screen.getAllByRole('button', { name: /Wählen/i });
+			await user.click(pickButtons[0]);
+			expect(onpick).toHaveBeenCalledOnce();
+		});
+	});
+});