Small possible edge case with empty username

validation.py

@@ -31,6 +31,8 @@ def validate_username(username: str) -> bool:
     gr.Error: If username is invalid or profile doesn't exist
     """
     username = username.strip()
+    if username == "":
+        raise gr.Error("❌ Please provide a username.")
 
     # Check if the Hugging Face profile exists
     profile_url = f"https://huggingface.co/{username}"