Feature/v2/filehistory (#4370)

File History

---------

Co-authored-by: Connor Yoh <[email protected]>

frontend/src/utils/toolResponseProcessor.ts

@@ -8,11 +8,12 @@ export type ResponseHandler = (blob: Blob, originalFiles: File[]) => Promise<Fil
  * - If a tool-specific responseHandler is provided, it is used.
  * - If responseHeaders provided and contains Content-Disposition, uses that filename.
  * - Otherwise, create a single file using the filePrefix + original name.
+ * - If filePrefix is empty, preserves the original filename.
  */
 export async function processResponse(
   blob: Blob,
   originalFiles: File[],
-  filePrefix: string,
+  filePrefix?: string,
   responseHandler?: ResponseHandler,
   responseHeaders?: Record<string, any>
 ): Promise<File[]> {
@@ -36,7 +37,13 @@ export async function processResponse(
 
   // Default behavior: use filePrefix + original name
   const original = originalFiles[0]?.name ?? 'result.pdf';
-  const name = `${filePrefix}${original}`;
+  // Only add prefix if it's not empty - this preserves original filenames for file history
+  const name = filePrefix ? `${filePrefix}${original}` : original;
   const type = blob.type || 'application/octet-stream';
-  return [new File([blob], name, { type })];
+
+  // File was modified by tool processing - set lastModified to current time
+  return [new File([blob], name, {
+    type,
+    lastModified: Date.now()
+  })];
 }