feat(ui): add floating menu for video selection

Implement floating button that toggles a menu with video options
Add styling for floating elements and handle click interactions
Update video switching logic to prevent unintended transitions

index.html

@@ -43,6 +43,18 @@
             <p id="transcript"></p>
         </div>
 
+        <!-- 悬浮球 -->
+        <div id="floating-button">
+            <i class="fas fa-bars"></i>
+        </div>
+
+        <!-- 悬浮菜单 -->
+        <div id="menu-container" class="hidden">
+            <button class="menu-item" data-video="视频资源/jimeng-2025-07-16-4437-比耶，然后微笑着优雅的左右摇晃.mp4">Pose</button>
+            <button class="menu-item" data-video="视频资源/生成加油视频.mp4">Cheer</button>
+            <button class="menu-item" data-video="视频资源/生成跳舞视频.mp4">Dance</button>
+        </div>
+
         <!-- 底部麦克风和链接 -->
         <footer class="bottom-bar">
             <button class="mic-button" id="mic-button" aria-label="Start Listening">

script.js

@@ -15,6 +15,9 @@ document.addEventListener('DOMContentLoaded', function() {
     let video2 = document.getElementById('video2');
     const micButton = document.getElementById('mic-button');
     const favorabilityBar = document.getElementById('favorability-bar');
+    const floatingButton = document.getElementById('floating-button');
+    const menuContainer = document.getElementById('menu-container');
+    const menuItems = document.querySelectorAll('.menu-item');
 
     let activeVideo = video1;
     let inactiveVideo = video2;
@@ -134,6 +137,51 @@ document.addEventListener('DOMContentLoaded', function() {
     });
 
 
+    // --- 悬浮按钮交互 ---
+    floatingButton.addEventListener('click', (event) => {
+        event.stopPropagation(); // 防止事件冒泡到 document
+        menuContainer.classList.toggle('hidden');
+    });
+
+    menuItems.forEach(item => {
+        item.addEventListener('click', function() {
+            const videoSrc = this.getAttribute('data-video');
+            playSpecificVideo(videoSrc);
+            menuContainer.classList.add('hidden');
+        });
+    });
+
+    // 点击菜单外部区域关闭菜单
+    document.addEventListener('click', () => {
+        if (!menuContainer.classList.contains('hidden')) {
+            menuContainer.classList.add('hidden');
+        }
+    });
+
+    // 阻止菜单自身的点击事件冒泡
+    menuContainer.addEventListener('click', (event) => {
+        event.stopPropagation();
+    });
+
+
+    function playSpecificVideo(videoSrc) {
+        const currentVideoSrc = activeVideo.querySelector('source').getAttribute('src');
+        if (videoSrc === currentVideoSrc) return;
+
+        inactiveVideo.querySelector('source').setAttribute('src', videoSrc);
+        inactiveVideo.load();
+
+        inactiveVideo.addEventListener('canplaythrough', function onCanPlayThrough() {
+            inactiveVideo.removeEventListener('canplaythrough', onCanPlayThrough);
+            activeVideo.pause(); // 暂停当前视频，防止其 'ended' 事件触发切换
+            inactiveVideo.play().catch(error => console.error("Video play failed:", error));
+            activeVideo.classList.remove('active');
+            inactiveVideo.classList.add('active');
+            [activeVideo, inactiveVideo] = [inactiveVideo, activeVideo];
+            activeVideo.addEventListener('ended', switchVideo, { once: true });
+        }, { once: true });
+    }
+
     // --- 情感分析与反应 ---
     const positiveWords = ['开心', '高兴', '喜欢', '太棒了', '你好', '漂亮'];
     const negativeWords = ['难过', '生气', '讨厌', '伤心'];
@@ -179,6 +227,7 @@ document.addEventListener('DOMContentLoaded', function() {
 
         inactiveVideo.addEventListener('canplaythrough', function onCanPlayThrough() {
             inactiveVideo.removeEventListener('canplaythrough', onCanPlayThrough);
+            activeVideo.pause(); // 暂停当前视频，防止其 'ended' 事件触发切换
             inactiveVideo.play().catch(error => console.error("Video play failed:", error));
             activeVideo.classList.remove('active');
             inactiveVideo.classList.add('active');

style.css

@@ -152,6 +152,78 @@ html, body {
     text-shadow: 1px 1px 2px rgba(0,0,0,0.7);
 }
 
+/* --- 悬浮按钮和菜单 --- */
+#floating-button {
+    position: fixed;
+    bottom: 120px; /* 调整位置，使其在麦克风按钮上方 */
+    right: 30px;
+    width: 60px;
+    height: 60px;
+    background: rgba(255, 255, 255, 0.15);
+    backdrop-filter: blur(10px);
+    -webkit-backdrop-filter: blur(10px);
+    border: 1px solid rgba(255, 255, 255, 0.2);
+    border-radius: 50%;
+    display: flex;
+    justify-content: center;
+    align-items: center;
+    cursor: pointer;
+    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
+    transition: transform 0.2s ease, box-shadow 0.2s ease;
+    z-index: 10;
+}
+
+#floating-button:hover {
+    transform: scale(1.1);
+    box-shadow: 0 6px 20px rgba(0, 0, 0, 0.3);
+}
+
+#floating-button i {
+    font-size: 24px;
+    color: white;
+}
+
+#menu-container {
+    position: fixed;
+    bottom: 200px; /* 调整位置，使其在悬浮按钮上方 */
+    right: 30px;
+    width: 150px;
+    background: rgba(0, 0, 0, 0.7);
+    backdrop-filter: blur(10px);
+    -webkit-backdrop-filter: blur(10px);
+    border-radius: 10px;
+    padding: 10px;
+    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
+    z-index: 9;
+    transition: opacity 0.3s ease, transform 0.3s ease;
+    transform-origin: bottom right;
+}
+
+#menu-container.hidden {
+    opacity: 0;
+    transform: scale(0.95);
+    pointer-events: none;
+}
+
+.menu-item {
+    display: block;
+    width: 100%;
+    padding: 12px;
+    background: none;
+    border: none;
+    color: white;
+    font-size: 1rem;
+    text-align: left;
+    cursor: pointer;
+    border-radius: 5px;
+    transition: background-color 0.2s ease;
+}
+
+.menu-item:hover {
+    background-color: rgba(255, 255, 255, 0.1);
+}
+
+
 /* --- 底部内容 --- */
 .bottom-bar {
     width: 100%;