Update app.py

app.py

@@ -191,7 +191,7 @@ md_submodels_outline = r'''
 2. **📊 Analytics, Forecasting and Visualization - BI, dashboards and forecasting**  
 3. **📝 Data Governance and Quality - Modeling, warehousing and stakeholder comms**
 
-## 4. 📢 Community OpenSource Communication CoOS
+## 4. �    **📢 Community OpenSource Communication CoOS
 1. **📚 Technical Documentation and Demos - Code examples, demos and notebooks**  
 2. **💬 Community Engagement and Collaboration - Public speaking, social media and collabs**
 
@@ -360,8 +360,7 @@ def main():
     st.set_page_config(page_title="Densified Skill Tree", layout="wide")
     
     # Get query parameters
-    query_params = st.get_query_params()
-    selected_area = query_params.get("area", [None])[0]
+    selected_area = st.query_params.get("area", None)  # Get the 'area' parameter, default to None
     
     # Display combined outline
     st.markdown(md_combined_outline, unsafe_allow_html=True)
@@ -374,6 +373,9 @@ def main():
                 st.markdown(markdown_areas[key], unsafe_allow_html=True)
                 if key in mermaid_areas:
                     render_mermaid(mermaid_areas[key], height=350)
+                # Add a "Back to Overview" button
+                if st.button("Back to Overview"):
+                    st.query_params.clear()  # Clear query parameters to show all areas
                 break
     else:
         # Show all areas if no specific area is selected
@@ -382,7 +384,7 @@ def main():
             if key in mermaid_areas:
                 render_mermaid(mermaid_areas[key], height=350)
     
-    # Render the Failure Analysis combined mermaid diagram
+    # Render the combined mermaid diagram
     render_mermaid(combined_mermaid, height=850)
     
     # Display additional markdown sections