fixed button issues

gradio_app.py

@@ -15,13 +15,15 @@ def upload_file(filepath, source_lang, target_lang):
     aligner = Aligner(config_folder, source_lang, target_lang, temp_folder)
     translated_file_name = translate_document(filepath, source_lang, target_lang, translator, aligner)
     return [gr.UploadButton(visible=False),
-            gr.DownloadButton(label=f"Download {translated_file_name}", value=translated_file_name, visible=True)]
+            gr.DownloadButton(label=f"Download {translated_file_name}", value=translated_file_name, visible=True,
+                              interactive=True)]
 
 
 def before_processing():
     return [
-        gr.UploadButton("Processing...", interactive=False),
-        gr.DownloadButton(visible=False)  # Keep download hidden until processing finishes
+        gr.UploadButton(visible=False),
+        gr.DownloadButton("Processing...", visible=True, interactive=False)
+        # Keep download hidden until processing finishes
     ]