refactor(tasks): simplify create task list modal by removing share dropdown

frontend/src/features/triage/TasksView.tsx

@@ -78,7 +78,6 @@ export const TasksView: React.FC<TasksViewProps> = ({
   const [showNewListModal, setShowNewListModal] = useState(false);
   const [newListTitle, setNewListTitle] = useState('');
   const [newListIcon, setNewListIcon] = useState('📋');
-  const [newListShareTarget, setNewListShareTarget] = useState('');
 
   // Share TaskList modal state
   const [showShareListModal, setShowShareListModal] = useState(false);
@@ -699,27 +698,16 @@ export const TasksView: React.FC<TasksViewProps> = ({
     const title = newListTitle.trim();
     if (!title) return;
     try {
-      let teamId: string | undefined = undefined;
-      let userId: string | undefined = undefined;
-      if (newListShareTarget.startsWith('team:')) {
-        teamId = newListShareTarget.replace('team:', '');
-      } else if (newListShareTarget.startsWith('user:')) {
-        userId = newListShareTarget.replace('user:', '');
-      }
       const created = await api.createTaskList({
         title,
         icon: newListIcon,
-        teamId: teamId,
       });
-      if (userId && created?.id) {
-        await api.addTaskListShare(created.id, { targetType: 'user', targetId: userId });
-      }
       const freshLists = await api.getTaskLists();
       setTaskLists(freshLists);
       setSelectedListId(created.id);
       setShowNewListModal(false);
       setNewListTitle('');
-      setNewListShareTarget('');
+      setNewListIcon('📋');
     } catch (err: any) {
       alert(err.message || 'Fehler beim Erstellen der Aufgabenliste');
     }
@@ -1374,37 +1362,6 @@ export const TasksView: React.FC<TasksViewProps> = ({
                 </div>
               </div>
 
-              <div>
-                <label className="block text-xs text-muted mb-1">
-                  Freigabe (optional)
-                </label>
-                <select
-                  value={newListShareTarget}
-                  onChange={(e) => setNewListShareTarget(e.target.value)}
-                  className="w-full h-8 input-field px-2 text-xs"
-                >
-                  <option value="">🔒 Privat (nur für mich)</option>
-                  {safeTeams.length > 0 && (
-                    <optgroup label="Teams & Gruppen">
-                      {safeTeams.map((tm) => (
-                        <option key={tm.id} value={`team:${tm.id}`}>
-                          👥 {tm.name}
-                        </option>
-                      ))}
-                    </optgroup>
-                  )}
-                  {safeCollaborators.length > 0 && (
-                    <optgroup label="Einzelne Benutzer">
-                      {safeCollaborators.map((u) => (
-                        <option key={u.id} value={`user:${u.id}`}>
-                          👤 {u.displayName || u.email}
-                        </option>
-                      ))}
-                    </optgroup>
-                  )}
-                </select>
-              </div>
-
               <div className="flex items-center justify-end gap-2 pt-2 border-t border-border">
                 <button
                   type="button"