fix: draggable nur auf Folder-Icon, Rechtsklick funktioniert wieder

frontend/src/components/ai/SessionList.tsx

@@ -86,13 +86,6 @@ function TreeItem({
       {/* Folder header - drop target */}
       {!isRoot && (
         <div
-          draggable
-          onDragStart={(e) => {
-            if (e.button !== 0) { e.preventDefault(); return; }
-            e.dataTransfer.setData('text/plain', `folder:${node.folder!.id}`);
-            e.dataTransfer.effectAllowed = 'move';
-            onDragFolder(node.folder!.id);
-          }}
           onDragOver={handleDragOver}
           onDragLeave={() => setIsDragOver(false)}
           onDrop={handleDrop}
@@ -107,9 +100,20 @@ function TreeItem({
           <svg className={clsx('w-4 h-4 transition-transform', expanded && 'rotate-90')} fill="none" viewBox="0 0 24 24" stroke="currentColor">
             <path strokeLinecap="round" strokeLinejoin="round" strokeWidth={2} d="M9 5l7 7-7 7" />
           </svg>
+          <span
+            draggable
+            onDragStart={(e) => {
+              e.dataTransfer.setData('text/plain', `folder:${node.folder!.id}`);
+              e.dataTransfer.effectAllowed = 'move';
+              onDragFolder(node.folder!.id);
+            }}
+            className="cursor-grab active:cursor-grabbing flex items-center"
+            title="Ordner verschieben"
+          >
             <svg className="w-4 h-4 text-secondary-400" fill="none" viewBox="0 0 24 24" stroke="currentColor">
               <path strokeLinecap="round" strokeLinejoin="round" strokeWidth={2} d="M3 7v10a2 2 0 002 2h14a2 2 0 002-2V9a2 2 0 00-2-2h-6l-2-2H5a2 2 0 00-2 2z" />
             </svg>
+          </span>
           <span className="flex-1 truncate">{node.folder!.name}</span>
               <button onClick={(e) => { e.stopPropagation(); onContextMenu(e, 'folder', node.folder!.id); }} className="opacity-0 group-hover:opacity-100 text-secondary-400 hover:text-primary-600 p-0.5" title="Umbenennen">
                 <svg className="w-3.5 h-3.5" fill="none" viewBox="0 0 24 24" stroke="currentColor"><path strokeLinecap="round" strokeLinejoin="round" strokeWidth={2} d="M11 5H6a2 2 0 00-2 2v11a2 2 0 002 2h11a2 2 0 002-2v-5m-1.414-9.414a2 2 0 112.828 2.828L11.828 15H9v-2.828l8.586-8.586z" /></svg>