Changes made as recommended by Claude:

1. Added a request timeout to prevent server resources from being tied up (route.ts)
2. Implemented runtime validation for the API response shape (url-utils.ts)
3. Removed hardcoded English error messages and replaced them with localized strings (url-input-dialog.tsx)
4. Fixed the incorrect i18n namespace (changed from pdf.* to url.*) (url-input-dialog.tsx and en/ja/zh.json)

lib/i18n/dictionaries/en.json

@@ -187,7 +187,7 @@
         "chars": "chars",
         "removeFile": "Remove file"
     },
-    "pdf": {
+    "url": {
         "title": "Extract Content from URL",
         "description": "Paste a URL to extract and analyze its content",
         "Extracting": "Extracting...",

lib/i18n/dictionaries/ja.json

@@ -187,7 +187,7 @@
         "chars": "文字",
         "removeFile": "ファイルを削除"
     },
-    "pdf": {
+    "url": {
         "title": "URLからコンテンツを抽出",
         "description": "URLを貼り付けてそのコンテンツを抽出および分析します",
         "Extracting": "抽出中...",

lib/i18n/dictionaries/zh.json

@@ -187,7 +187,7 @@
         "chars": "字符",
         "removeFile": "移除文件"
     },
-    "pdf": {
+    "url": {
         "title": "从 URL 提取内容",
         "description": "粘贴 URL 以提取和分析其内容",
         "Extracting": "提取中...",