사이드바 width 조정, 버튼 아이콘 제거

src/renderer/index.html

@@ -16,8 +16,8 @@
 
   <aside>
     <nav class="sidebar-nav">
-      <button class="btn btn-warning" id="btn-open">📁 폴더 열기 (O)</button>
-      <button class="btn btn-success" id="btn-rename" disabled>✅ 이름 변경 실행 (S)</button>
+      <button class="btn btn-warning" id="btn-open">폴더 열기 (O)</button>
+      <button class="btn btn-success" id="btn-rename" disabled>이름 변경 실행 (S)</button>
     </nav>
     <section class="file-explorer">
       <!-- 추후 구현 -->
@@ -31,7 +31,7 @@
         <button class="sort-btn" id="btn-sort-date">날짜순</button>
       </div>
       <div class="separator"></div>
-      <button class="btn btn-info active" id="btn-preview-toggle">🔍 미리보기</button>
+      <button class="btn btn-info active" id="btn-preview-toggle">미리보기</button>
     </nav>
 
     <form id="format-bar">

src/renderer/style.css

@@ -74,7 +74,7 @@ header h1 {
 
 /* ── 사이드바 ── */
 aside {
-  width: 400px;
+  width: 300px;
   flex-shrink: 0;
   display: flex;
   flex-direction: column;