MM-64155: Fix searchbox clear button to reset search type (#31006)

Co-authored-by: Claude <noreply@anthropic.com>

webapp/channels/src/components/new_search/new_search.tsx

@@ -266,7 +266,7 @@ const NewSearch = (): JSX.Element => {
         >
             <i className='icon icon-magnify'/>
             {(searchType === 'messages' || searchType === 'files') && (
-                <SearchTypeBadge>
+                <SearchTypeBadge data-testid='searchTypeBadge'>
                     {searchType === 'messages' && (
                         <FormattedMessage
                             id='search_bar.search_types.messages'

webapp/channels/src/components/new_search/search_box_input.tsx

@@ -95,7 +95,7 @@ const SearchInput = forwardRef<HTMLInputElement, Props>(({searchTerms, searchTyp
     const clearSearch = useCallback(() => {
         setSearchTerms('');
         dispatch(updateSearchTerms(''));
-        dispatch(updateSearchType('messages'));
+        dispatch(updateSearchType(''));
         focus(0);
     }, [focus, setSearchTerms]);