feat: select text across bullets and delete it like a text editor; Ctrl+Z in tasks; notes and lists without emoji; custom done columns complete tasks

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

frontend/src/features/lists/SharedListsView.tsx

@@ -1171,7 +1171,7 @@ export const SharedListsView: React.FC<SharedListsViewProps> = ({ onRefreshGloba
       <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}` : '🛒 Einkaufsliste'}
+            {activeList ? [activeList.icon, activeList.title].filter(Boolean).join(' ') : '🛒 Einkaufsliste'}
           </span>
           {openItems.length > 0 && (
             <span className="badge-neutral text-[11px] flex-shrink-0">
@@ -1204,7 +1204,7 @@ export const SharedListsView: React.FC<SharedListsViewProps> = ({ onRefreshGloba
             <div>
               <label className="block text-xs text-muted mb-1">Titel der Liste</label>
               <div className="flex items-center gap-1.5">
-                <EmojiIconButton value={newListIcon} onChange={setNewListIcon} fallback="🛒" />
+                <EmojiIconButton value={newListIcon} onChange={setNewListIcon} />
                 <input
                   type="text"
                   value={newListTitle}
@@ -1540,7 +1540,7 @@ export const SharedListsView: React.FC<SharedListsViewProps> = ({ onRefreshGloba
           onClose={() => setShowShareModal(false)}
           title={`Liste teilen: ${activeList.title}`}
           resourceName={activeList.title}
-          resourceIcon={activeList.icon || '🛒'}
+          resourceIcon={activeList.icon || undefined}
           isOwner={activeList.isOwner !== false && (activeList.userId === currentUser?.id || !activeList.userId || currentUser?.role === 'admin')}
           currentUserId={currentUser?.id}
           shares={(activeList.shares || []).map((s) => ({