diff --git a/frontend/src/components/DateConstraintManager.tsx b/frontend/src/components/DateConstraintManager.tsx
index 46618fd..ba60a1d 100644
--- a/frontend/src/components/DateConstraintManager.tsx
+++ b/frontend/src/components/DateConstraintManager.tsx
@@ -1,5 +1,5 @@
 import React, { useState } from 'react'
-import { ChecklistItem } from '../types'
+import type { ChecklistItem } from '../types'
 
 interface DateConstraintManagerProps {
   item: ChecklistItem
diff --git a/frontend/src/pages/Checklist.tsx b/frontend/src/pages/Checklist.tsx
index 7877bbe..876fdf8 100644
--- a/frontend/src/pages/Checklist.tsx
+++ b/frontend/src/pages/Checklist.tsx
@@ -215,19 +215,7 @@ export default function Checklist() {
     }
   }
 
-  const renderItems = (treeItems: ChecklistItemType[], allItems: ChecklistItemType[]) => {
-    return treeItems.map(item => (
-      <ChecklistItem
-        key={item.id}
-        item={item}
-        onUpdate={updateItem}
-        onDelete={deleteItem}
-        onLock={lockItem}
-        children={item.children || []}
-        allItems={allItems}
-      />
-    ))
-  }
+
 
   const renderGroupedItems = (allItems: ChecklistItemType[]) => {
     const itemTree = buildItemTree(allItems)
@@ -348,7 +336,7 @@ export default function Checklist() {
     )
   }
 
-  const itemTree = buildItemTree(items)
+
 
   return (
     <div className="min-h-screen bg-gray-50 dark:bg-gray-900">