refactor: filter页面使用图片懒加载组件

src/pages/filter.astro

@@ -6,6 +6,7 @@ import Folder from "@/assets/icon/folder.png?url";
 import { formatDatetime } from "@/lib/format.ts";
 import { createHttp } from "@/lib/request";
 import type { CategoriesStats, Post, Tag } from "@/types";
+import LazyImage from "@/components/LazyImage.astro";
 
 const http = createHttp(Astro.request.headers);
 
@@ -144,7 +145,7 @@ const isActive = (targetType: string, targetCode: string) =>
                 <li class="post-card">
                   <a class="post-cover" href={`/post/${post.slug}`} aria-label={post.title}>
                     {post.cover ? (
-                      <img src={post.cover} alt={post.title} loading="lazy" />
+                      <LazyImage src={post.cover} alt={post.title} />
                     ) : (
                       <span class="cover-placeholder">{post.title[0]}</span>
                     )}
@@ -343,7 +344,6 @@ const isActive = (targetType: string, targetCode: string) =>
     font-size: 40px;
     color: #fff;
     overflow: hidden;
-    background: linear-gradient(135deg, #4f6df5, #7b5cf0);
   }
 
   .post-cover img {