fix(planner): exclude current recipe from swap suggestions

Adds excludeRecipeId prop to SwapSuggestionList so the meal being
replaced is not offered as a swap candidate.

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

frontend/src/lib/planner/SwapSuggestionList.svelte

@@ -11,6 +11,7 @@
 		replacingMeta,
 		recipes,
 		currentWeekRecipeIds,
+		excludeRecipeId,
 		isLoading = false,
 		onpick,
 		oncancel
@@ -19,11 +20,16 @@
 		replacingMeta?: string;
 		recipes: Recipe[];
 		currentWeekRecipeIds: Set<string>;
+		excludeRecipeId?: string;
 		isLoading?: boolean;
 		onpick: (recipeId: string, recipeName: string) => void;
 		oncancel?: () => void;
 	} = $props();
 
+	let visibleRecipes = $derived(
+		excludeRecipeId ? recipes.filter((r) => r.id !== excludeRecipeId) : recipes
+	);
+
 	function recipeMeta(recipe: Recipe): string {
 		return [
 			recipe.cookTimeMin != null ? `${recipe.cookTimeMin} min` : null,
@@ -60,7 +66,7 @@
 </p>
 
 <!-- Recipe list -->
-{#if recipes.length === 0}
+{#if visibleRecipes.length === 0}
 	<p
 		data-testid="swap-empty-state"
 		style="text-align: center; color: var(--color-text-muted); font-family: var(--font-sans); margin: 0;"
@@ -68,7 +74,7 @@
 		Keine Rezepte verfügbar.
 	</p>
 {:else}
-	{#each recipes as recipe (recipe.id)}
+	{#each visibleRecipes as recipe (recipe.id)}
 		{@const meta = recipeMeta(recipe)}
 		{@const alreadyPlanned = currentWeekRecipeIds.has(recipe.id)}
 		<div

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

@@ -74,6 +74,20 @@ describe('SwapSuggestionList', () => {
 		expect(screen.getByTestId('swap-empty-state')).toBeTruthy();
 	});
 
+	it('excludes the recipe being replaced when excludeRecipeId is provided', () => {
+		render(SwapSuggestionList, { props: { ...baseProps, excludeRecipeId: 'r2' } });
+		expect(screen.queryByText('Chicken stir-fry')).toBeNull();
+		expect(screen.getByText('Quick carbonara')).toBeTruthy();
+		expect(screen.getByText('Mushroom risotto')).toBeTruthy();
+	});
+
+	it('shows all recipes when excludeRecipeId is not provided', () => {
+		render(SwapSuggestionList, { props: baseProps });
+		expect(screen.getByText('Quick carbonara')).toBeTruthy();
+		expect(screen.getByText('Chicken stir-fry')).toBeTruthy();
+		expect(screen.getByText('Mushroom risotto')).toBeTruthy();
+	});
+
 	it('disables all Wählen buttons when isLoading is true', () => {
 		render(SwapSuggestionList, { props: { ...baseProps, isLoading: true } });
 		const buttons = screen.getAllByRole('button', { name: /Wählen/i });

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

@@ -309,6 +309,7 @@
 				replacingMeta={replacingMeta || undefined}
 				recipes={sortedRecipes}
 				{currentWeekRecipeIds}
+				excludeRecipeId={selectedSlot.recipe?.id}
 				isLoading={swapLoading}
 				onpick={handleSwapPick}
 				oncancel={() => (swapSheetOpen = false)}
@@ -549,6 +550,7 @@
 							replacingMeta={replacingMeta || undefined}
 							recipes={sortedRecipes}
 							{currentWeekRecipeIds}
+							excludeRecipeId={pickerSlot.recipe.id}
 							onpick={handleRecipePick}
 						/>
 					</div>