refactor(components): 优化卡片组件并更新运行时配置

- 移除多个卡片组件的懒加载属性以提升首屏性能
- 使用ImagePlaceholder组件统一骨架屏实现
- 修复DemoCard组件中的拼写错误
- 标准化runtime.ts中的JSON格式
- 更新package.json中的包管理器配置

src/components/VideoCard.tsx

@@ -158,7 +158,7 @@ export default function VideoCard({
       )}${year ? `&year=${year}` : ''}${from ? `&from=${from}` : ''}`}
     >
       <div
-        className={`group relative w-full rounded-lg bg-transparent flex flex-col cursor-pointer transition-all duration-300 ease-in-out ${
+        className={`group relative w-full rounded-lg bg-transparent/0 flex flex-col cursor-pointer transition-all duration-300 ease-in-out ${
           isDeleting ? 'opacity-0 scale-90' : ''
         }`}
       >
@@ -171,7 +171,6 @@ export default function VideoCard({
             src={poster}
             alt={title}
             fill
-            loading='lazy'
             className={`object-cover transition-transform duration-500 cubic-bezier(0.4,0,0.2,1) group-hover:scale-110
                       ${
                         isLoaded