fix(shopping): requireOnline-Guards + 2-space indent

src/routes/shopping-list/+page.svelte

@@ -7,6 +7,7 @@
   import type { ShoppingListRow as Row } from '$lib/server/shopping/repository';
   import { shoppingCartStore } from '$lib/client/shopping-cart.svelte';
   import { confirmAction } from '$lib/client/confirm.svelte';
+  import { requireOnline } from '$lib/client/require-online';
 
   let snapshot = $state<ShoppingListSnapshot>({ recipes: [], rows: [], uncheckedCount: 0 });
   let loading = $state(true);
@@ -23,6 +24,7 @@
   }
 
   async function onToggleRow(row: Row, next: boolean) {
+    if (!requireOnline('Abhaken')) return;
     const method = next ? 'POST' : 'DELETE';
     await fetch('/api/shopping-list/check', {
       method,
@@ -34,6 +36,7 @@
   }
 
   async function onServingsChange(recipeId: number, servings: number) {
+    if (!requireOnline('Portionen-Aenderung')) return;
     await fetch(`/api/shopping-list/recipe/${recipeId}`, {
       method: 'PATCH',
       headers: { 'content-type': 'application/json' },
@@ -44,18 +47,21 @@
   }
 
   async function onRemoveRecipe(recipeId: number) {
+    if (!requireOnline('Rezept-Entfernung')) return;
     await fetch(`/api/shopping-list/recipe/${recipeId}`, { method: 'DELETE' });
     await load();
     void shoppingCartStore.refresh();
   }
 
   async function clearChecked() {
+    if (!requireOnline('Erledigte entfernen')) return;
     await fetch('/api/shopping-list/checked', { method: 'DELETE' });
     await load();
     void shoppingCartStore.refresh();
   }
 
   async function clearAll() {
+    if (!requireOnline('Liste leeren')) return;
     const ok = await confirmAction({
       title: 'Einkaufsliste leeren?',
       message: 'Alle Rezepte und abgehakten Zutaten werden entfernt. Das lässt sich nicht rückgängig machen.',