fix:수당정산 필터 6열 반응형 그리드로 변경

모바일 2열 → 태블릿 3열 → 데스크톱 6열 반응형 레이아웃

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

resources/views/finance/settlement/partials/commission/filters.blade.php

@@ -2,7 +2,7 @@
 <div class="bg-white rounded-lg shadow-sm p-4 mb-6">
     <form id="filter-form" method="GET" action="{{ route('finance.settlement') }}">
         <input type="hidden" name="tab" value="commission">
-        <div class="grid grid-cols-2 md:grid-cols-3 gap-3">
+        <div class="grid grid-cols-2 sm:grid-cols-3 lg:grid-cols-6 gap-3">
             {{-- 년도 --}}
             <div>
                 <label class="block text-xs font-medium text-gray-500 mb-1">년도</label>