fix:검색 패널 select 너비 여유 확보 (pr-8 + 커스텀 화살표)

텍스트와 꺽음 마크 겹침 방지를 위해 오른쪽 패딩 확대 및
appearance-none + 커스텀 SVG 화살표 적용

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

resources/views/barobill/etax/index.blade.php

@@ -596,7 +596,7 @@
         const labelCell = "px-3 py-2.5 bg-stone-50 text-stone-600 text-xs font-semibold whitespace-nowrap border border-stone-200 text-right";
         const valueCell = "px-2 py-1.5 border border-stone-200";
         const inputSm = "w-full px-2 py-1.5 text-sm border-0 outline-none bg-transparent focus:ring-0";
-        const selectSm = "px-2 py-1.5 text-sm border border-stone-200 rounded outline-none bg-white focus:ring-2 focus:ring-blue-400";
+        const selectSm = "px-3 pr-8 py-1.5 text-sm border border-stone-200 rounded outline-none bg-white focus:ring-2 focus:ring-blue-400 appearance-none bg-[url('data:image/svg+xml;charset=UTF-8,%3Csvg%20xmlns%3D%22http%3A%2F%2Fwww.w3.org%2F2000%2Fsvg%22%20width%3D%2212%22%20height%3D%2212%22%20viewBox%3D%220%200%2024%2024%22%20fill%3D%22none%22%20stroke%3D%22%23666%22%20stroke-width%3D%222%22%3E%3Cpath%20d%3D%22M6%209l6%206%206-6%22%2F%3E%3C%2Fsvg%3E')] bg-no-repeat bg-[right_0.5rem_center]";
         const quickBtn = "px-2.5 py-1 text-xs font-medium border border-stone-300 rounded hover:bg-stone-100 transition-colors";
 
         return (