Fix: Allow space character in Select input

Fixed issue where pressing the space key in Select input would not add a space character to the input field.

The root cause was that preventDefault() was always called when mode was not 'combobox', which prevented typing spaces even when the input was editable in showSearch mode.

Changes:
- Modified space key handling to only call preventDefault() when the input is not editable
- Input is considered editable when mode is 'combobox' or showSearch is true
- This allows users to type spaces in editable Select inputs while preventing default behavior (scroll/submit) in non-editable Selects

This fix allows users to type spaces in search terms within Select components with showSearch enabled.

Author: zombieJ

src/BaseSelect/index.tsx

@@ -470,8 +470,8 @@ const BaseSelect = React.forwardRef<BaseSelectRef, BaseSelectProps>((props, ref)
 
     // Enter or Space opens dropdown (ARIA combobox: spacebar should open)
     if (isEnterKey || isSpaceKey) {
-      // Do not submit form when type in the input; prevent Space from scrolling page
-      if (mode !== 'combobox') {
+      const isEditable = mode === 'combobox' || showSearch;
+      if (!isEditable) {
         event.preventDefault();
       }