[FIX] Fixing regression for remote storage file view (#1063)

Fixing regression for remote storage file view

Co-authored-by: Gayathri <[email protected]>

Author: harini-venkataraman

backend/utils/file_storage/helpers/prompt_studio_file_helper.py

@@ -2,7 +2,7 @@
 import logging
 import os
 from pathlib import Path
-from typing import Any, Union
+from typing import Any
 
 from file_management.file_management_helper import FileManagerHelper
 from unstract.sdk.file_storage import FileStorage
@@ -77,7 +77,7 @@ def upload_for_ide(
     @staticmethod
     def fetch_file_contents(
         org_id: str, user_id: str, tool_id: str, file_name: str
-    ) -> Union[bytes, str]:
+    ) -> dict[str, Any]:
         """Method to fetch file contents from the remote location.
         The path is constructed in runtime based on the args"""
         fs_instance = EnvHelper.get_storage(
@@ -125,7 +125,7 @@ def fetch_file_contents(
                 encoding="utf-8",
             )
             encoded_string = base64.b64encode(bytes(text_content_bytes))
-            return encoded_string
+            return {"data": encoded_string, "mime_type": file_content_type}
 
         elif file_content_type == "text/plain":
             text_content_string: str = fs_instance.read(
@@ -134,7 +134,7 @@ def fetch_file_contents(
                 legacy_storage_path=legacy_file_path,
                 encoding="utf-8",
             )
-            return text_content_string
+            return {"data": text_content_string, "mime_type": file_content_type}
         else:
             raise ValueError(f"Unsupported file type: {file_content_type}")