Update app.py

app.py

@@ -83,7 +83,7 @@ class LLMManager:
 
         downloaded = 0
         with open(temp_path, 'wb') as f:
-            for chunk in response.iter_content(chunk_size=8192):
+            for chunk in response.iter_content(chunk_size=32768):
                 if chunk:
                     f.write(chunk)
                     downloaded += len(chunk)