chore(Home): remove redundant play button icon and wrapper

删除了首页卡片中多余的播放按钮SVG图标及其容器元素，简化页面结构

src/pages/Home.tsx

@@ -127,15 +127,6 @@ export default function Home() {
                 <div className="glass-card rounded-3xl overflow-hidden transform rotate-2 hover:rotate-0 transition-transform duration-500">
                   <div className="aspect-video bg-gradient-to-br from-purple-900/50 to-blue-900/50 flex items-center justify-center">
                     <div className="text-center">
-                      <div className="w-20 h-20 mx-auto mb-4 rounded-full gradient-bg-animated flex items-center justify-center animate-pulse-glow">
-                        <svg
-                          className="w-10 h-10 text-white ml-1"
-                          fill="currentColor"
-                          viewBox="0 0 24 24"
-                        >
-                          <path d="M8 5v14l11-7z" />
-                        </svg>
-                      </div>
                       <p className="text-gray-400">AI生成的品牌宣傳片</p>
                     </div>
                   </div>