Refactor exposure_player handling in app.py to use session state for consistent data access during exposure evaluations.

app.py

@@ -1330,7 +1330,7 @@ with tab2:
                         st.session_state['export_merge'] = st.session_state['export_base'].copy()
             with st.expander('Exposure Management'):
                 with st.form(key='Exposures'):
-                    exposure_player = st.selectbox("Player", options=sorted(list(player_names)))
+                    exposure_player = st.selectbox("Player", options=sorted(list(player_names)), key='exposure_player')
                     exposure_target = st.number_input("Target Exposure", value=.50, min_value=0.0, max_value=1.0, step=0.01)
                     if 'Stack' in st.session_state['working_frame'].columns:
                         exposure_stack_bool = st.selectbox("Maintain Stacks?", options=['Yes', 'No'], index=0)
@@ -1345,7 +1345,7 @@ with tab2:
                         exp_submitted = st.form_submit_button("Export")
                     if reg_submitted:
                         st.session_state['settings_base'] = False
-                        parsed_frame = exposure_spread(st.session_state['working_frame'], exposure_player, exposure_target, exposure_stack_bool, remove_teams_exposure, st.session_state['projections_df'], sport_var, type_var, salary_max)
+                        parsed_frame = exposure_spread(st.session_state['working_frame'], st.session_state['exposure_player'], exposure_target, exposure_stack_bool, remove_teams_exposure, st.session_state['projections_df'], sport_var, type_var, salary_max)
                         if type_var == 'Classic':
                             if sport_var == 'CS2' or sport_var == 'LOL':
                                 # Calculate salary (CPT uses cpt_salary_map, others use salary_map)
@@ -1407,7 +1407,7 @@ with tab2:
                         st.session_state['export_merge'] = st.session_state['working_frame'].copy()
                     elif exp_submitted:
                         st.session_state['settings_base'] = False
-                        parsed_frame = exposure_spread(st.session_state['export_base'], exposure_player, exposure_target, exposure_stack_bool, remove_teams_exposure, st.session_state['projections_df'], sport_var, type_var, salary_max)
+                        parsed_frame = exposure_spread(st.session_state['export_base'], st.session_state['exposure_player'], exposure_target, exposure_stack_bool, remove_teams_exposure, st.session_state['projections_df'], sport_var, type_var, salary_max)
                         
                         if type_var == 'Classic':
                             if sport_var == 'CS2' or sport_var == 'LOL':