fix: remove trailing spaces in use-file-upload.ts

Co-authored-by: U8F69 <41963680+U8F69@users.noreply.github.com>

Author: Copilot

frontend/hooks/use-file-upload.ts

@@ -12,7 +12,7 @@ import {handleBulkImportContentWithFilter} from '@/components/common/project';
  */
 const parseJsonlContent = (content: string): string => {
   const trimmedContent = content.trim();
-  
+
   // 尝试解析为 JSON 数组格式
   if (trimmedContent.startsWith('[') && trimmedContent.endsWith(']')) {
     try {