Adjust pagination logic to start from page 1 in app.py

- Updated the initialization of 'current_page' in session state to start from 1 instead of 0, ensuring accurate page navigation.
- Modified start and end index calculations for pagination to align with the new page numbering, enhancing user experience and clarity in data display.

app.py

@@ -185,7 +185,7 @@ with tab2:
         
         # Initialize pagination in session state if not exists
         if 'current_page' not in st.session_state:
-            st.session_state.current_page = 0
+            st.session_state.current_page = 1
 
         # Calculate total pages
         rows_per_page = 500
@@ -196,10 +196,10 @@ with tab2:
         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.session_state['current_page'] > 0:
+                if st.session_state['current_page'] > 1:
                     st.session_state.current_page -= 1
                 else:
-                    st.session_state.current_page = 0
+                    st.session_state.current_page = 1
                     if 'player_frame' in st.session_state:
                         del st.session_state['player_frame']
                         del st.session_state['stack_frame']
@@ -212,8 +212,8 @@ with tab2:
                     del st.session_state['stack_frame']
 
         # Calculate start and end indices for current page
-        start_idx = st.session_state.current_page * rows_per_page
-        end_idx = min((st.session_state.current_page + 1) * rows_per_page, total_rows)
+        start_idx = (st.session_state.current_page - 1) * rows_per_page
+        end_idx = min((st.session_state.current_page) * rows_per_page, total_rows)
         st.dataframe(
             working_df.iloc[start_idx:end_idx].style
             .background_gradient(axis=0)