Refactor contest file handling in app.py to improve session state management

- Updated the handling of the contest file upload to store the file in session state, ensuring consistent access across different conditions.
- Adjusted the logic for loading contest data to check session state for 'Contest_file', enhancing data integrity and user experience during manual and database search processes.

app.py

@@ -68,12 +68,12 @@ with tab1:
         if parse_type == 'DB Search':
             contest_name_var = st.selectbox("Select Contest to load", contest_names)
         elif parse_type == 'Manual':
-            Contest_file = st.file_uploader("Upload Contest File (CSV or Excel)", type=['csv', 'xlsx', 'xls'])
+            st.session_state['Contest_file'] = st.file_uploader("Upload Contest File (CSV or Excel)", type=['csv', 'xlsx', 'xls'])
         if 'Contest' in st.session_state:
             del st.session_state['Contest']
         if parse_type == 'Manual':
-            if Contest_file and 'Adj_Contest' not in st.session_state:
-                st.session_state['Contest'], st.session_state['ownership_df'], st.session_state['actual_df'], st.session_state['entry_list'] = load_contest_file(Contest_file, sport_select)
+            if 'Contest_file' not in st.session_state and 'Adj_Contest' not in st.session_state:
+                st.session_state['Contest'], st.session_state['ownership_df'], st.session_state['actual_df'], st.session_state['entry_list'] = load_contest_file(st.session_state['Contest_file'], sport_select)
                 st.session_state['Contest'] = st.session_state['Contest'].dropna(how='all')
                 st.session_state['Contest'] = st.session_state['Contest'].reset_index(drop=True)
                 if st.session_state['Contest'] is not None:
@@ -81,9 +81,9 @@ with tab1:
                     st.dataframe(st.session_state['Contest'].head(10))
         elif parse_type == 'DB Search':
             if st.button('Load Contest Data', key='load_contest_data'):
-                Contest_file = grab_contest_data('MLB', contest_name_var, contest_id_map, contest_date_map)
+                st.session_state['Contest_file'] = grab_contest_data('MLB', contest_name_var, contest_id_map, contest_date_map)
                 if 'Adj_Contest' not in st.session_state:
-                    st.session_state['Contest'], st.session_state['ownership_df'], st.session_state['actual_df'], st.session_state['entry_list'] = load_contest_file(Contest_file, sport_select)
+                    st.session_state['Contest'], st.session_state['ownership_df'], st.session_state['actual_df'], st.session_state['entry_list'] = load_contest_file(st.session_state['Contest_file'], sport_select)
                     st.session_state['Contest'] = st.session_state['Contest'].dropna(how='all')
                     st.session_state['Contest'] = st.session_state['Contest'].reset_index(drop=True)
                     if st.session_state['Contest'] is not None: