Remove backwards compatibility

app/components/controls/MultiSelect/MultiSelect.container.tsx

@@ -14,8 +14,7 @@ const MultiSelectContainer = memo<MultiSelectProps>(
     options,
     onChipClick,
     onAddClick,
-    showAddButton: showAddButtonProp,
-    addButton: addButtonProp,
+    addButton: addButtonProp = true,
     addButtonText = "Add organization type",
     formHeader = true,
     onCustomChipConfirm,
@@ -24,8 +23,6 @@ const MultiSelectContainer = memo<MultiSelectProps>(
   }) => {
     const size = normalizeMultiSelectSize(sizeProp);
     const palette = normalizeChipPalette(paletteProp);
-    // Backward compatibility: if addButton is provided, use it; otherwise use showAddButton
-    const showAddButton = addButtonProp !== undefined ? addButtonProp : (showAddButtonProp !== undefined ? showAddButtonProp : true);
 
     return (
       <MultiSelectView
@@ -36,7 +33,7 @@ const MultiSelectContainer = memo<MultiSelectProps>(
         options={options}
         onChipClick={onChipClick}
         onAddClick={onAddClick}
-        showAddButton={showAddButton}
+        addButton={addButtonProp}
         addButtonText={addButtonText}
         formHeader={formHeader}
         onCustomChipConfirm={onCustomChipConfirm}

app/components/controls/MultiSelect/MultiSelect.types.ts

@@ -39,10 +39,6 @@ export interface MultiSelectProps {
    * Callback when add button is clicked
    */
   onAddClick?: () => void;
-  /**
-   * Show the add button (backward compatibility - use addButton instead)
-   */
-  showAddButton?: boolean;
   /**
    * Whether to show add button (Figma prop).
    * @default true
@@ -76,7 +72,7 @@ export interface MultiSelectViewProps {
   options: ChipOption[];
   onChipClick?: (chipId: string) => void;
   onAddClick?: () => void;
-  showAddButton: boolean;
+  addButton: boolean;
   addButtonText: string;
   formHeader: boolean;
   onCustomChipConfirm?: (chipId: string, value: string) => void;

app/components/controls/MultiSelect/MultiSelect.view.tsx

@@ -13,7 +13,7 @@ function MultiSelectView({
   options,
   onChipClick,
   onAddClick,
-  showAddButton,
+  addButton,
   addButtonText,
   formHeader = true,
   onCustomChipConfirm,
@@ -75,7 +75,7 @@ function MultiSelectView({
         ))}
 
         {/* Add button - Circular button with border (not ghost) when no text, ghost style when text provided */}
-        {showAddButton && (
+        {addButton && (
           <button
             type="button"
             aria-label={addButtonText || "Add option"}