Enhance player selection functionality in Handbuilder tab of Streamlit app by introducing a dynamic dataframe key for improved state management and ensuring selections are cleared effectively upon lineup reset.

src/streamlit_app.py

@@ -616,11 +616,13 @@ if selected_tab == 'Handbuilder':
     handbuilder_lineup_build_column, handbuilder_player_select_column = st.columns([1, 2])
     with handbuilder_player_select_column:
         st.subheader("Player Select")
+        dataframe_key = f"player_select_dataframe_{st.session_state.get('dataframe_key_counter', 0)}"
+        
         event = st.dataframe(
             st.session_state['player_select_df'].style.background_gradient(axis=0).background_gradient(cmap='RdYlGn').background_gradient(cmap='RdYlGn_r', subset=['Salary', 'Own']).format(precision=2),
             on_select="rerun",
-            selection_mode="multi-row",  # Changed to multiple selection
-            key="player_select_dataframe",
+            selection_mode="multi-row",
+            key=dataframe_key,
             height=500,
             hide_index=True
         )
@@ -787,8 +789,11 @@ if selected_tab == 'Handbuilder':
     clear_col, save_col, export_col, clear_saved_col, blank_col = st.columns([2, 2, 2, 2, 12])
     with clear_col:
         if st.button("Clear Lineup", key='clear_lineup_button'):
-            st.session_state['previous_player_selection'] = []
             st.session_state['handbuilder_lineup'] = pd.DataFrame(columns=['Player', 'Position', 'Team', 'Salary', 'Median', '2x%', 'Own', 'Slot'])
+            # Clear the dataframe selections by resetting the previous selection state
+            st.session_state['previous_player_selection'] = []
+            # Force dataframe to re-render with new key to clear selections
+            st.session_state['dataframe_key_counter'] = st.session_state.get('dataframe_key_counter', 0) + 1
             st.rerun()
     with save_col:
         if st.button("Save Lineup", key='save_lineup_button'):