diff --git a/memento-note/components/agents/agent-detail-view.tsx b/memento-note/components/agents/agent-detail-view.tsx
index 9976ebb..570df9c 100644
--- a/memento-note/components/agents/agent-detail-view.tsx
+++ b/memento-note/components/agents/agent-detail-view.tsx
@@ -495,12 +495,12 @@ export function AgentDetailView({
                         >
                           <option value="">{t('agents.form.selectNotebook')}</option>
                           {notebooks.filter(nb => !nb.parentId).map(nb => (
-                            <optgroup key={nb.id} label={nb.name}>
-                              <option value={nb.id}>{nb.name}</option>
+                            <>
+                              <option key={nb.id} value={nb.id}>{nb.name}</option>
                               {notebooks.filter(c => c.parentId === nb.id).map(child => (
                                 <option key={child.id} value={child.id}>  └ {child.name}</option>
                               ))}
-                            </optgroup>
+                            </>
                           ))}
                         </select>
                       </div>
@@ -651,12 +651,12 @@ export function AgentDetailView({
                         <select value={targetNotebookId} onChange={e => setTargetNotebookId(e.target.value)} className={selectCls}>
                           <option value="">{t('agents.form.inbox')}</option>
                           {notebooks.filter(nb => !nb.parentId).map(nb => (
-                            <optgroup key={nb.id} label={nb.name}>
-                              <option value={nb.id}>{nb.name}</option>
+                            <>
+                              <option key={nb.id} value={nb.id}>{nb.name}</option>
                               {notebooks.filter(c => c.parentId === nb.id).map(child => (
                                 <option key={child.id} value={child.id}>  └ {child.name}</option>
                               ))}
-                            </optgroup>
+                            </>
                           ))}
                         </select>
                       </div>