feat: remove header and buttons, move actions to toolbar, drag&drop to any folder level

frontend/src/components/ai/SessionList.tsx

@@ -36,13 +36,12 @@ function buildTree(folders: ChatFolder[], sessions: ChatSession[]): TreeNode[] {
 }
 
 function TreeItem({
-  node, activeSessionId, onSelectSession, depth, onMoveSession, onDeleteFolder, onAddFolder, onDragSession, onDropToFolder,
+  node, activeSessionId, onSelectSession, depth, onDeleteFolder, onAddFolder, onDragSession, onDropToFolder,
 }: {
   node: TreeNode;
   activeSessionId: string | null;
   onSelectSession: (id: string) => void;
   depth: number;
-  onMoveSession: (sessionId: string, folderId: string | null) => void;
   onDeleteFolder: (folderId: string) => void;
   onAddFolder: (parentId: string | null) => void;
   onDragSession: (sessionId: string) => void;
@@ -109,7 +108,6 @@ function TreeItem({
           activeSessionId={activeSessionId}
           onSelectSession={onSelectSession}
           depth={depth + 1}
-          onMoveSession={onMoveSession}
           onDeleteFolder={onDeleteFolder}
           onAddFolder={onAddFolder}
           onDragSession={onDragSession}
@@ -138,15 +136,8 @@ export function SessionList({ activeSessionId, onSelectSession, isSidebar, class
 
   useEffect(() => { loadData(); }, [isSidebar]);
 
-  const handleNewChat = async () => {
-    try {
-      const session = await createSession({ is_sidebar: isSidebar || false });
-      setSessions((prev) => [session, ...prev]); onSelectSession(session.id);
-    } catch (e) { setError(e instanceof Error ? e.message : 'Failed'); }
-  };
-
   const handleAddFolder = (parentId: string | null) => {
-    const name = prompt('Ordnername:');;
+    const name = prompt('Ordnername:');
     if (!name) return;
     createFolder({ name, parent_id: parentId || undefined }).then(() => loadData()).catch((e) => setError(e?.message));
   };
@@ -171,10 +162,6 @@ export function SessionList({ activeSessionId, onSelectSession, isSidebar, class
 
   return (
     <div className={clsx('flex flex-col h-full', className)}>
-      <div className="p-3 border-b border-secondary-200 flex gap-2">
-        <button onClick={handleNewChat} className="flex-1 rounded-lg bg-primary-600 text-white px-3 py-2 text-sm font-medium hover:bg-primary-700">+ Neuer Chat</button>
-        <button onClick={() => handleAddFolder(null)} className="rounded-lg border border-secondary-300 px-3 py-2 text-sm hover:bg-secondary-100" title="Neuer Ordner">📁+</button>
-      </div>
       {error && <div className="p-2 text-xs text-red-600">{error}</div>}
       <div className="flex-1 overflow-y-auto p-2">
         {tree.map((node) => (
@@ -184,7 +171,6 @@ export function SessionList({ activeSessionId, onSelectSession, isSidebar, class
             activeSessionId={activeSessionId}
             onSelectSession={onSelectSession}
             depth={0}
-            onMoveSession={() => {}}
             onDeleteFolder={handleDeleteFolder}
             onAddFolder={handleAddFolder}
             onDragSession={setDragSessionId}