Fixed remote API client download URL characters bug

Author: beveradb

audio_separator/remote/api_client.py

@@ -3,6 +3,7 @@
 import logging
 import json
 from typing import Optional, List, Dict
+from urllib.parse import quote
 
 import requests
 
@@ -319,7 +320,9 @@ def download_file(self, task_id: str, filename: str, output_path: Optional[str]
             output_path = filename
 
         try:
-            response = self.session.get(f"{self.api_url}/download/{task_id}/{filename}", timeout=60)
+            # URL encode the filename to handle spaces and special characters
+            encoded_filename = quote(filename, safe='')
+            response = self.session.get(f"{self.api_url}/download/{task_id}/{encoded_filename}", timeout=60)
             response.raise_for_status()
 
             with open(output_path, "wb") as f: