Update app.py

app.py

@@ -136,10 +136,13 @@ Order from most to least impactful.
 
 
 def analyze_repo(repo_url: str, github_token: str, groq_api_key: str, progress=gr.Progress()):
+    repo_url = repo_url or ""
+    github_token = github_token or ""
+    groq_api_key = groq_api_key or ""
+
     if not repo_url.strip():
         return "❌ **Error:** Please enter a GitHub repository URL."
 
-    # Env var takes priority (HF Secret), then UI input
     api_key = os.environ.get("GROQ_API_KEY") or groq_api_key.strip()
     if not api_key:
         return "❌ **Error:** Please enter your Groq API key (free at [console.groq.com](https://console.groq.com))."