diff --git a/frontend/app/generate/page.tsx b/frontend/app/generate/page.tsx
index 06438bd..361cf39 100644
--- a/frontend/app/generate/page.tsx
+++ b/frontend/app/generate/page.tsx
@@ -97,10 +97,14 @@ function GenerateContent() {
     setIsAnalyzing(true)
 
     try {
+      // 獲取認證 token
+      const token = typeof window !== 'undefined' ? localStorage.getItem('auth_token') : null
+
       const response = await fetch(`${API_CONFIG.BASE_URL}/api/ai/analyze-sentence`, {
         method: 'POST',
         headers: {
-          'Content-Type': 'application/json'
+          'Content-Type': 'application/json',
+          ...(token && { 'Authorization': `Bearer ${token}` })
         },
         body: JSON.stringify({
           inputText: textInput,
@@ -116,6 +120,9 @@ function GenerateContent() {
       })
 
       if (!response.ok) {
+        if (response.status === 401) {
+          throw new Error('請先登入後再使用 AI 分析功能')
+        }
         throw new Error(`API請求失敗: ${response.status}`)
       }