Enhance projections loading logic in Data Load tab

Updated the session state management for projections loading. Introduced a check to initialize the 'projections_loaded' state and modified the condition for loading projections to ensure it only occurs when projections have been successfully uploaded or loaded from the database. This improves the reliability of the loading process and enhances user feedback.

app.py

@@ -660,12 +660,16 @@ if selected_tab == 'Data Load':
         upload_col, template_col = st.columns([3, 1])
         
         with upload_col:
+            if 'portfolio' not in st.session_state:
+                st.session_state['projections_loaded'] = False
             if proj_options == 'User Upload':
                 projections_file = st.file_uploader("Upload Projections File (CSV or Excel)", type=['csv', 'xlsx', 'xls'])
+                st.session_state['projections_loaded'] = True
             elif proj_options == 'Paydirt DB':
                 if st.button("Load from Database"):
                     projections_file = init_nfl_baselines(type_var, site_var, 'Main Slate')[0]
                     st.session_state['db_projections_file'] = projections_file
+                    st.session_state['projections_loaded'] = True
             if 'projections_df' in st.session_state:
                 del st.session_state['projections_df']
         
@@ -680,7 +684,7 @@ if selected_tab == 'Data Load':
                 mime="text/csv"
             )
             
-        if projections_file:
+        if st.session_state['projections_loaded']:
             export_projections, projections = load_file(projections_file, site_var, type_var, sport_var, 'projections')
             if projections is not None:
                 st.success('Projections file loaded successfully!')