Refactor player removal functionality in Handbuilder tab of Streamlit app to support multi-selection for improved user experience. Update feedback messages to reflect multiple players being removed and enhance state management during lineup updates.

src/streamlit_app.py

@@ -712,23 +712,6 @@ if selected_tab == 'Handbuilder':
             height=445,
             hide_index=True
         )
-        
-        # Remove Player button
-        if st.button("Remove Selected Player from Lineup", key="remove_player_button"):
-            # For removal, we can use a simple dropdown or text input
-            if not filled_lineup.empty:
-                player_to_remove = st.selectbox(
-                    "Select player to remove:",
-                    options=filled_lineup['Player'].tolist(),
-                    key="remove_player_selectbox"
-                )
-                if st.button("Confirm Remove", key="confirm_remove_button"):
-                    st.session_state['handbuilder_lineup'] = st.session_state['handbuilder_lineup'][
-                        st.session_state['handbuilder_lineup']['Player'] != player_to_remove
-                    ]
-                    st.success(f"Removed {player_to_remove} from lineup")
-            else:
-                st.warning("No players in lineup to remove")
 
         # --- SUMMARY ROW ---
         if not filled_lineup.empty:
@@ -789,7 +772,22 @@ if selected_tab == 'Handbuilder':
                         """,
                         unsafe_allow_html=True
                     )
-
+        # Remove Player button
+        if not filled_lineup.empty:
+            players_to_remove = st.multiselect(
+                "Select players to remove:",
+                options=filled_lineup['Player'].tolist(),
+                key="remove_player_multiselect"
+            )
+            if st.button("Confirm Remove", key="confirm_remove_button"):
+                st.session_state['handbuilder_lineup'] = st.session_state['handbuilder_lineup'][
+                    ~st.session_state['handbuilder_lineup']['Player'].isin(players_to_remove)
+                ]
+                if players_to_remove:
+                    st.success(f"Removed {', '.join(players_to_remove)} from lineup")
+                else:
+                    st.warning("No players selected for removal")
+                    
     # Optionally, add a button to clear the lineup
     clear_col, save_col, export_col, clear_saved_col, blank_col = st.columns([2, 2, 2, 2, 12])
     with clear_col: