style: replace upload-style share icon with two-person users icon across all views

frontend/src/features/triage/TasksView.tsx

@@ -13,8 +13,6 @@ import {
   Edit3,
   X,
   Layers,
-  Share,
-  Share2,
   Users,
   CheckSquare,
   User as UserIcon,
@@ -1165,7 +1163,7 @@ export const TasksView: React.FC<TasksViewProps> = ({
                   className="btn-icon"
                   title="Aufgabenliste teilen und Berechtigungen"
                 >
-                  <Share className="w-3.5 h-3.5" />
+                  <Users className="w-3.5 h-3.5" />
                 </button>
               </div>
             );