feat(recipes): filter ingredients with quantity <= 0 before API submission

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

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

@@ -3,30 +3,44 @@ import { render, screen } from '@testing-library/svelte';
 import VarietyWarningCards from './VarietyWarningCards.svelte';
 
 const warnings = [
-	{ title: 'Chicken zweimal diese Woche', explanation: 'Mo, Mi — erwäge einen Tausch.' },
-	{ title: 'Tomaten in 3 Gerichten', explanation: 'Mo, Di, Mi — sorge für Abwechslung.' }
+	{
+		title: 'Chicken zweimal diese Woche',
+		items: [
+			{ dayShort: 'Mo', recipeName: 'Chicken Tikka', slotId: 1 },
+			{ dayShort: 'Mi', recipeName: 'Chicken Curry', slotId: 3 }
+		]
+	},
+	{
+		title: 'Tomaten in 3 Gerichten',
+		items: [
+			{ dayShort: 'Mo', recipeName: 'Pasta Pomodoro', slotId: 1 },
+			{ dayShort: 'Di', recipeName: 'Tomatensuppe', slotId: 2 },
+			{ dayShort: 'Mi', recipeName: 'Pizza Margherita', slotId: 3 }
+		]
+	}
 ];
 
 describe('VarietyWarningCards', () => {
 	it('renders one card per warning', () => {
-		render(VarietyWarningCards, { props: { warnings } });
+		render(VarietyWarningCards, { props: { warnings, weekStart: '2026-04-07' } });
 		const cards = screen.getAllByTestId('warning-card');
 		expect(cards.length).toBe(2);
 	});
 
 	it('renders warning titles', () => {
-		render(VarietyWarningCards, { props: { warnings } });
+		render(VarietyWarningCards, { props: { warnings, weekStart: '2026-04-07' } });
 		expect(screen.getByText(/Chicken zweimal/)).toBeTruthy();
 		expect(screen.getByText(/Tomaten in 3/)).toBeTruthy();
 	});
 
 	it('renders warning explanations', () => {
-		render(VarietyWarningCards, { props: { warnings } });
-		expect(screen.getByText(/erwäge einen Tausch/)).toBeTruthy();
+		render(VarietyWarningCards, { props: { warnings, weekStart: '2026-04-07' } });
+		expect(screen.getByText('Chicken Tikka')).toBeTruthy();
+		expect(screen.getByText('Chicken Curry')).toBeTruthy();
 	});
 
 	it('renders nothing when warnings is empty', () => {
-		render(VarietyWarningCards, { props: { warnings: [] } });
+		render(VarietyWarningCards, { props: { warnings: [], weekStart: '2026-04-07' } });
 		expect(screen.queryAllByTestId('warning-card').length).toBe(0);
 	});
 });

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

@@ -29,7 +29,7 @@ const editProps = {
 		name: 'Spaghetti Bolognese',
 		serves: 4,
 		cookTimeMin: 30,
-		effort: 'Medium',
+		effort: 'medium',
 		heroImageUrl: undefined as string | undefined,
 		ingredients: [
 			{ name: 'Spaghetti', quantity: 200, unit: 'g' }