Update app.py

app.py

@@ -249,12 +249,14 @@ def check_connection(user_tz=None):
 with gr.Blocks(theme=gr.themes.Default()) as demo:
     # Capture browser timezone via JS and store in state
     user_tz_state = gr.State("")
-    demo.load(
-        fn=lambda: None,
-        inputs=None,
-        outputs=user_tz_state,
-        js="() => Intl.DateTimeFormat().resolvedOptions().timeZone"
-    )
+    # On load, capture browser timezone via JS and store in user_tz_state
+demo.load(
+    fn=lambda tz: tz,                    # echo the JS value back to Gradio
+    inputs=None,
+    outputs=[user_tz_state],             # outputs must be a LIST
+    js="() => Intl.DateTimeFormat().resolvedOptions().timeZone"
+)
+
 
     gr.Markdown(f"# Medical Decision Support AI\n{header(user_tz=None)}")