feat(planner): add remove meal with undo; fix RecipePicker badge for neutral delta

- MealActionSheet: new onremove prop + Entfernen button (guarded by #if)
- +page.svelte: handleRemoveMeal submits delete form, shows undo bar;
  undo re-adds via addSlot form; refactored handleUndo to undoCallback
  pattern; desktop day-detail panel also gets Entfernen button
- RecipePicker: only show green +delta badge when scoreDelta > 0;
  neutral (scoreDelta = 0) shows no badge instead of ⚠ Variationskonflikt
- Tests: page.test.ts remove-meal describe, RecipePicker neutral badge test

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

frontend/src/lib/planner/RecipePicker.svelte

@@ -104,7 +104,7 @@
 							{meta}
 						</p>
 					{/if}
-					{#if !suggestion.hasConflict}
+					{#if (suggestion.scoreDelta ?? 0) > 0}
 						<span
 							data-testid="badge-{suggestion.recipe.id}"
 							data-type="good"
@@ -112,7 +112,7 @@
 						>
 							↑ +{(suggestion.scoreDelta ?? 0).toFixed(1)} Punkte
 						</span>
-					{:else}
+					{:else if suggestion.hasConflict}
 						<span
 							data-testid="badge-{suggestion.recipe.id}"
 							data-type="warning"

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

@@ -98,6 +98,14 @@ describe('RecipePicker', () => {
 		expect(screen.getByText(/Keine Treffer/i)).toBeTruthy();
 	});
 
+	it('shows no badge when scoreDelta is zero (neutral, no improvement)', () => {
+		const neutralSuggestions = [
+			{ recipe: { id: 'sn', name: 'Neutrales Rezept', effort: 'easy', cookTimeMin: 20 }, scoreDelta: 0.0, hasConflict: false }
+		];
+		render(RecipePicker, { props: { ...baseProps, suggestions: neutralSuggestions } });
+		expect(screen.queryByTestId('badge-sn')).toBeNull();
+	});
+
 	it('shows loading skeleton instead of Empfohlen section when isLoading is true', () => {
 		render(RecipePicker, { props: { ...baseProps, isLoading: true } });
 		expect(screen.getByTestId('suggestions-loading')).toBeTruthy();

frontend/src/routes/(app)/planner/+page.svelte

@@ -100,6 +100,7 @@
 	// UndoBar
 	let undoVisible = $state(false);
 	let undoMessage = $state('');
+	let undoCallback = $state<(() => void) | null>(null);
 
 	$effect(() => {
 		if (!activePickerDate || !weekPlan?.id) {
@@ -162,7 +163,33 @@
 
 	function handleUndo() {
 		undoVisible = false;
+		undoCallback?.();
+	}
+
+	async function handleRemoveMeal(slot: { id: string; slotDate: string; recipe: { id: string; name: string } | null }) {
+		// Capture primitive values immediately — slot may be a reactive proxy that
+		// becomes stale after the first await (tick flushes state + re-render).
+		const slotId = slot.id;
+		const slotDate = slot.slotDate;
+		const recipeName = slot.recipe?.name ?? '';
+		const recipeId = slot.recipe?.id ?? '';
+		if (!slotId || !recipeId) return;
+
+		actionSheetOpen = false;
+		undoCallback = async () => {
+			addPlanId = weekPlan!.id;
+			addSlotDate = slotDate;
+			addRecipeId = recipeId;
+			addRecipeName = recipeName;
+			await tick();
+			addSlotFormEl.requestSubmit();
+		};
+		delPlanId = weekPlan!.id;
+		delSlotId = slotId;
+		await tick();
 		deleteSlotFormEl.requestSubmit();
+		undoMessage = `${recipeName} entfernt`;
+		undoVisible = true;
 	}
 
 	async function handleSwapPick(recipeId: string, recipeName: string) {
@@ -315,12 +342,13 @@
 		/>
 	</BottomSheet>
 
-	<!-- Mobile: meal exists → action sheet (Swap / Cook / View / Cancel) -->
+	<!-- Mobile: meal exists → action sheet (Swap / Cook / View / Remove / Cancel) -->
 	<MealActionSheet
 		open={actionSheetOpen}
 		slot={selectedSlot}
 		onswap={() => { actionSheetOpen = false; swapSheetOpen = true; }}
 		oncancel={() => (actionSheetOpen = false)}
+		onremove={isPlanner && selectedSlot.id ? () => handleRemoveMeal(selectedSlot as any) : undefined}
 	/>
 
 	<!-- Mobile: swap suggestions sheet -->
@@ -530,6 +558,15 @@
 							>
 								Gericht tauschen
 							</button>
+							{#if detailSlot.id}
+								<button
+									type="button"
+									onclick={() => { handleRemoveMeal(detailSlot as any); panelState = { kind: 'idle' }; }}
+									class="block w-full rounded-[var(--radius-md)] border border-[var(--color-error,#d9534f)] px-3 py-2 text-center text-[13px] font-medium tracking-[0.04em] font-[var(--font-sans)] text-[var(--color-error,#d9534f)] hover:bg-[var(--color-surface)]"
+								>
+									Entfernen
+								</button>
+							{/if}
 						{/if}
 					</div>
 				{:else}
@@ -611,8 +648,10 @@
 			formData.set('recipeId', addRecipeId);
 			return async ({ result, update }) => {
 				if (result.type === 'success' && result.data?.success) {
+					const slotId = (result.data as any)?.slot?.id ?? '';
 					delPlanId = addPlanId;
-					delSlotId = (result.data as any)?.slot?.id ?? '';
+					delSlotId = slotId;
+					undoCallback = () => deleteSlotFormEl.requestSubmit();
 					undoMessage = `${addRecipeName} hinzugefügt`;
 					undoVisible = true;
 				}
@@ -639,6 +678,7 @@
 				if (result.type === 'success' && result.data?.success) {
 					delPlanId = updPlanId;
 					delSlotId = (result.data as any)?.slot?.id ?? '';
+					undoCallback = () => deleteSlotFormEl.requestSubmit();
 					undoMessage = `${updRecipeName} eingetragen`;
 					undoVisible = true;
 				}

frontend/src/routes/(app)/planner/page.test.ts

@@ -1,5 +1,5 @@
 import { describe, it, expect, vi, afterEach } from 'vitest';
-import { render, screen, waitFor } from '@testing-library/svelte';
+import { render, screen, waitFor, within } from '@testing-library/svelte';
 import userEvent from '@testing-library/user-event';
 import Page from './+page.svelte';
 
@@ -13,13 +13,23 @@ const PLAN_ID = 'plan-00000000-0000-0000-0000-000000000001';
 const DATE = '2025-01-06'; // Monday, January 6 2025
 
 const mockData = {
-	weekPlan: { id: PLAN_ID, weekStart: DATE, status: 'draft', slots: [] },
+	weekPlan: { id: PLAN_ID, weekStart: DATE, status: 'draft', slots: [] as any[] },
 	varietyScore: null,
 	weekStart: DATE,
 	recipes: [{ id: 'r1', name: 'Beef Bourguignon', effort: 'hard', cookTimeMin: 150 }],
 	benutzer: { rolle: 'planer' }
 };
 
+const mockDataWithSlot = {
+	...mockData,
+	weekPlan: {
+		id: PLAN_ID,
+		weekStart: DATE,
+		status: 'draft',
+		slots: [{ id: 'slot-1', slotDate: DATE, recipe: { id: 'r1', name: 'Beef Bourguignon', effort: 'hard', cookTimeMin: 150 } }]
+	}
+};
+
 const mockSuggestions = [
 	{
 		recipe: { id: 's1', name: 'Lachsfilet', effort: 'easy', cookTimeMin: 20 },
@@ -82,3 +92,35 @@ describe('+page.svelte — $effect suggestion fetch', () => {
 		expect(fetchOptions?.signal).toBeInstanceOf(AbortSignal);
 	});
 });
+
+describe('+page.svelte — remove meal', () => {
+	afterEach(() => {
+		vi.restoreAllMocks();
+	});
+
+	it('clicking Entfernen in MealActionSheet shows undo bar with recipe name', async () => {
+		vi.stubGlobal('fetch', vi.fn().mockResolvedValue({ json: () => Promise.resolve({ suggestions: [] }) }));
+
+		render(Page, { props: { data: mockDataWithSlot } });
+
+		await userEvent.click(screen.getByTestId('day-meal-card'));
+		await userEvent.click(await screen.findByRole('button', { name: /Entfernen/i }));
+
+		const undoBar = screen.getByTestId('undo-bar');
+		expect(undoBar).toBeTruthy();
+		expect(within(undoBar).getByText(/Beef Bourguignon/)).toBeTruthy();
+	});
+
+	it('clicking Rückgängig after remove hides the undo bar', async () => {
+		vi.stubGlobal('fetch', vi.fn().mockResolvedValue({ json: () => Promise.resolve({ suggestions: [] }) }));
+
+		render(Page, { props: { data: mockDataWithSlot } });
+
+		await userEvent.click(screen.getByTestId('day-meal-card'));
+		await userEvent.click(await screen.findByRole('button', { name: /Entfernen/i }));
+
+		await userEvent.click(screen.getByRole('button', { name: /Rückgängig/i }));
+
+		expect(screen.queryByTestId('undo-bar')).toBeNull();
+	});
+});