优化用户名显示方式

public/index.html

@@ -51,7 +51,6 @@
                     <button id="clear-transcode-cache-btn" class="action-btn" title="清空转码缓存">清空转码缓存</button>
                 </div>
                 <div class="user-info">
-                    <span id="current-username"></span>
                     <button id="logout-btn" class="action-btn danger">退出登录</button>
                 </div>
             </div>
@@ -60,7 +59,7 @@
         <main class="dashboard">
             <section class="video-list-section glass-panel">
                 <div class="section-header">
-                    <h2>Available Videos</h2>
+                    <h2 id="video-list-header">Available Videos</h2>
                 </div>
                 <div class="bucket-panel">
                     <label for="bucket-select">Select Bucket</label>

public/js/main.js

@@ -21,7 +21,7 @@ document.addEventListener('DOMContentLoaded', () => {
     const transcodeBtn = document.getElementById('transcode-btn');
     const stopTranscodeBtn = document.getElementById('stop-transcode-btn');
     const themeSelector = document.getElementById('theme-selector');
-    const currentUsername = document.getElementById('current-username');
+    const videoListHeader = document.getElementById('video-list-header');
     const logoutBtn = document.getElementById('logout-btn');
     const topBannerTitle = document.getElementById('top-banner-title');
     const playBtn = document.getElementById('play-btn');
@@ -587,7 +587,7 @@ document.addEventListener('DOMContentLoaded', () => {
         localStorage.setItem('sessionId', sessionId);
         if (username) {
             localStorage.setItem('username', username);
-            if (currentUsername) currentUsername.textContent = username;
+            if (videoListHeader) videoListHeader.textContent = `${username} Available Videos`;
         }
     };