Update pagination button labels for clarity in app.py

- Changed button labels to "Previous Page" and "Next Page" for improved user understanding during navigation.
- Maintained session state management by ensuring relevant data is cleared upon page transitions, consistent with previous enhancements.

app.py

@@ -195,7 +195,7 @@ with tab2:
         # Create pagination controls in a single row
         pagination_cols = st.columns([4, 1, 1, 1, 4])
         with pagination_cols[1]:
-            if st.button(f"Page {st.session_state.current_page - 1}"):
+            if st.button(f"Previous Page"):
                 if st.session_state['current_page'] > 1:
                     st.session_state.current_page -= 1
                 else:
@@ -205,7 +205,7 @@ with tab2:
                         del st.session_state['stack_frame']
 
         with pagination_cols[3]:
-            if st.button(f"Page {st.session_state.current_page + 1}"):
+            if st.button(f"Next Page"):
                 st.session_state.current_page += 1
                 if 'player_frame' in st.session_state:
                     del st.session_state['player_frame']