优化Gallery页面滚动加载和布局，调整菜单项命名，添加Apps页面，更新依赖声明

src/lib/components/LazyImg.vue

@@ -1,8 +1,8 @@
 <template>
-  <div class="image-container">
+  <div class="image-container flex justify-center items-center">
     <n-image ref="lazyRef" class="lazy__img" :src="url"  @load="handleLoad" @error="handleError">
       <template #placeholder>
-        <img :src="loading" alt="loading" />
+        <img width="400" :src="loading" alt="loading" />
       </template>
       <template #error>
         <img :src="errorImg" alt="error" />
@@ -62,7 +62,7 @@ onMounted(() => {
 
 .lazy__img img[alt="loading"],
 .lazy__img img[alt="error"] {
-  width: 48px;
+  width: 80px;
   height: 80px;
   padding: 1em;
   margin: 0 auto;