Fix layout jumping with fixed height container

app.py

@@ -1,5 +1,5 @@
 """
-Traffic Accident Reconstruction Syste
+Traffic Accident Reconstruction System
 ======================================
 Main Streamlit Application
 Huawei AI Innovation Challenge 2026

ui/map_viewer.py

@@ -431,5 +431,8 @@ def render_results_map(scenarios: list, selected_scenario: int = 0):
         icon=folium.Icon(color='purple', icon='info-sign')
     ).add_to(m)
     
+    # Add fixed height container to prevent layout shift
+    st.markdown('<div style="min-height: 500px;">', unsafe_allow_html=True)
     # Display map using static version to prevent jumping
     folium_static(m, width=700, height=500)
+    st.markdown('</div>', unsafe_allow_html=True)