Update app.py

app.py

@@ -346,7 +346,7 @@ def generate_response(message, history):
             error_msg = f"🔐 **Authentication Error**\n\n"
             error_msg += f"Your API key appears to be invalid or expired.\n\n"
             error_msg += f"**Troubleshooting:**\n"
-            error_msg += f"1. Check that your **{api_key_var}** secret is set correctly\n"
+            error_msg += f"1. Check that your **{OPENROUTER_API_KEY}** is set correctly\n"
             error_msg += f"2. Verify your API key at: https://openrouter.ai/keys\n"
             error_msg += f"3. Ensure your key starts with `sk-or-`\n"
             error_msg += f"4. Check that you have credits on your OpenRouter account"
@@ -492,7 +492,7 @@ def get_configuration_status():
     if API_KEY_VALID:
         status_parts.append("✅ **API Key:** Configured and valid")
     else:
-        status_parts.append("❌ **API Key:** Not configured - Set `{api_key_var}` in Space secrets")
+        status_parts.append("❌ **API Key:** Not configured - Set `{OPENROUTER_API_KEY}` in Space secrets")
     
     status_parts.append(f"🤖 **Model:** {MODEL}")
     status_parts.append(f"🌡️ **Temperature:** 0.7")