Update app.py

app.py

@@ -639,7 +639,6 @@ def build_demo():
         )
 
     return demo
-
 # --- API endpoint: /chat ---
 
 def http_api_infer(question: str, request: gr.Request):
@@ -680,14 +679,15 @@ def http_api_infer(question: str, request: gr.Request):
         return f"❌ Error: {str(e)}"
 
 
-        
-   api_interface = gr.Interface(
+# ✅ Define the API Interface after the function is declared
+api_interface = gr.Interface(
     fn=http_api_infer,
     inputs=[gr.Textbox(label="Question")],
     outputs="text",
     api_name="/chat"
 )
 
+
 if __name__ == "__main__":
     parser = argparse.ArgumentParser()
     parser.add_argument("--host", type=str, default="0.0.0.0")
@@ -698,19 +698,16 @@ if __name__ == "__main__":
     args = parser.parse_args()
     logger.info(f"args: {args}")
 
-    # Build main UI and API endpoint interface
+    # UI block
     ui_demo = build_demo()
 
- 
-
-
-    # Serve both under tabs — API tab will be invisible in browser but callable
+    # Combine UI + API endpoint
     demo = gr.TabbedInterface(
         interface_list=[ui_demo, api_interface],
         tab_names=["UI", "API"]
     )
 
-    # ✅ Important: expose API via `api_open=True`
+    # Launch with API access
     demo.queue(api_open=True).launch(
         server_name=args.host,
         server_port=args.port,