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

frontend/src/components/UnifiedShareModal.tsx

@@ -6,7 +6,6 @@ import {
   Plus,
   Trash2,
   Lock,
-  Share2,
   Check,
 } from 'lucide-react';
 import { User, Team, UnifiedShare } from '../lib/types';
@@ -114,7 +113,7 @@ export const UnifiedShareModal: React.FC<UnifiedShareModalProps> = ({
                   resourceIcon
                 )
               ) : (
-                <Share2 className="w-4 h-4" />
+                <Users className="w-4 h-4" />
               )}
             </div>
             <div className="min-w-0">