chore(report): remove unused getReportDownloadUrl helper

frontend/src/api/report.js

@@ -50,13 +50,3 @@ export const chatWithReport = (data) => {
   return requestWithRetry(() => service.post('/api/report/chat', data), 3, 1000)
 }
 
-/**
- * Build the direct download URL for a report.
- * @param {string} reportId
- * @param {'md'|'pdf'} format
- * @returns {string} URL for direct download
- */
-export const getReportDownloadUrl = (reportId, format = 'md') => {
-  const base = import.meta.env.VITE_API_BASE_URL || ''
-  return `${base}/api/report/${reportId}/download?format=${format}`
-}