Update app.py

app.py

@@ -1242,7 +1242,7 @@ elif app_mode == "Model Training":
                 st.pyplot(fig)
 
         # ----- [3. Layer Configuration] -----
-    with st.subheader("🏗️ Network Architecture")
+    with st.subheader("🏗️ Network Architecture"):
         
         # Dynamic layer builder
         layer_types = [