feat(lists): switch lists from the title in the phone header

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

frontend/src/features/lists/SharedListsView.tsx

@@ -16,6 +16,7 @@ import { OFFLINE_ITEM_PREFIX, pendingListItems } from '../../lib/offline';
 import { UnifiedShareModal } from '../../components/UnifiedShareModal';
 import { AvatarStack, AvatarPerson } from '../../components/AvatarStack';
 import { CountBadge } from '../../components/CountBadge';
+import { ListSwitcher } from '../../components/ListSwitcher';
 import { OriginBadge } from '../../components/OriginBadge';
 import { VoiceInputButton } from '../../components/VoiceInputButton';
 import { FormSheet } from '../../components/FormSheet';
@@ -1170,9 +1171,21 @@ export const SharedListsView: React.FC<SharedListsViewProps> = ({ onRefreshGloba
       {/* Same height with or without the 36 px share button (Tasks, Shopping lists) */}
       <div className="flex sm:hidden items-center justify-between gap-2 px-3 py-2 min-h-[54px] rounded-btn bg-panel border border-border !mt-0">
         <div className="flex items-center gap-2 min-w-0">
-          <span className="text-sm font-semibold text-main truncate">
-            {activeList ? [activeList.icon, activeList.title].filter(Boolean).join(' ') : '🛒 Einkaufsliste'}
-          </span>
+          {activeList ? (
+            <ListSwitcher
+              label={[activeList.icon, activeList.title].filter(Boolean).join(' ')}
+              items={lists.map((lst) => ({
+                id: lst.id,
+                title: lst.title,
+                icon: lst.icon,
+                count: deduplicateItems(lst.items || []).filter((i) => !i.isCompleted).length,
+              }))}
+              activeId={activeList.id}
+              onSelect={setActiveListId}
+            />
+          ) : (
+            <span className="text-sm font-semibold text-main truncate">🛒 Einkaufsliste</span>
+          )}
           {openItems.length > 0 && (
             <span className="badge-neutral text-[11px] flex-shrink-0">
               {openItems.length} offen