Update app.py

app.py

@@ -158,15 +158,15 @@ with st.sidebar:
     # Navigation buttons (only relevant if we have papers in session)
     if 'papers' in st.session_state and st.session_state.papers:
         st.header("🔀 Navigation")
-        if st.button("Show Articles"):
+        if st.button("📑 Show Articles"):
             st.session_state.active_section = "articles"
-        if st.button("Literature Review & Summary"):
+        if st.button("📚 Literature Review & Summary"):
             st.session_state.active_section = "review"
-        if st.button("Concept & Visual Graph"):
+        if st.button("🔍 Concept & Visual Graph"):
             st.session_state.active_section = "graph"
-        if st.button("Formatted Citations"):
+        if st.button("📝 Formatted Citations"):
             st.session_state.active_section = "citations"
-        if st.button("Research Proposal"):
+        if st.button("💡 Research Proposal"):
             st.session_state.active_section = "proposal"
 
 # ---------------------------------