feat: 完成社区首页功能迭代，新增首页聚合与工作台组件

本次提交实现了完整的社区首页功能：
1. 新增首页聚合接口与服务，包含社区统计、热门帖、活跃用户与板块数据
2. 实现帖子推荐排序、SSR缓存与点赞态同步逻辑
3. 重构导航与布局系统，新增工作台侧边栏与移动端适配
4. 优化主题色与UI样式，统一设计系统风格
5. 修复登录注册页自动跳转与组件状态同步问题

frontend/components/PostRow.tsx

@@ -18,18 +18,35 @@ function formatTime(dateStr: string) {
 export default function PostRow({
   post,
   boardHref,
+  index = 0,
+  compact = false,
+  showViews = true,
+  showLike = true,
 }: {
   post: PostListItem;
   index?: number;
   boardHref?: boolean;
+  compact?: boolean;
+  showViews?: boolean;
+  showLike?: boolean;
 }) {
   return (
     <div
-      className="group flex items-center gap-3 sm:gap-4 px-4 sm:px-5 py-4 border-t transition-colors hover:bg-[var(--panel-2)]"
-      style={{ borderColor: "var(--line)" }}
+      className="group relative flex items-center gap-3 sm:gap-4 px-4 sm:px-5 border-t transition-colors hover:bg-[var(--panel-2)] j13-fade-up"
+      style={{
+        borderColor: "var(--line)",
+        paddingTop: compact ? 13 : 16,
+        paddingBottom: compact ? 13 : 16,
+        animationDelay: `${Math.min(index, 9) * 35}ms`,
+      }}
     >
-      <Link href={`/u/${post.user.id}`} className="shrink-0" aria-label={post.user.nickname}>
-        <Avatar name={post.user.nickname || post.user.username} size={42} />
+      <Link
+        href={`/u/${post.user.id}`}
+        className="shrink-0 above-link"
+        aria-label={post.user.nickname}
+        tabIndex={-1}
+      >
+        <Avatar name={post.user.nickname || post.user.username} size={compact ? 38 : 42} />
       </Link>
 
       <div className="flex-1 min-w-0">
@@ -39,7 +56,7 @@ export default function PostRow({
             {post.recommended && <span className="badge-rec">推荐</span>}
           </div>
         )}
-        <Link href={`/post/${post.id}`}>
+        <Link href={`/post/${post.id}`} className="stretch-link" aria-label={post.title}>
           <h3
             className="font-semibold text-[15px] sm:text-[16px] leading-snug truncate transition-colors group-hover:text-[var(--accent)]"
             style={{ color: "var(--ink)" }}
@@ -47,7 +64,7 @@ export default function PostRow({
             {post.title}
           </h3>
         </Link>
-        <div className="meta flex items-center gap-2.5 mt-1.5 flex-wrap">
+        <div className="meta relative z-[2] flex items-center gap-2.5 mt-1.5 flex-wrap">
           <Link
             href={`/u/${post.user.id}`}
             className="hover:text-[var(--accent)] transition-colors"
@@ -70,21 +87,28 @@ export default function PostRow({
         </div>
       </div>
 
-      <div className="flex items-center gap-2.5 sm:gap-3.5 shrink-0">
-        <span className="hidden sm:inline-flex items-center gap-1.5 meta" aria-label={`${post.comment_count} 条评论`}>
+      <div className="above-link flex items-center gap-2.5 sm:gap-3.5 shrink-0">
+        <span
+          className={`${showViews ? "hidden sm:inline-flex" : "inline-flex"} items-center gap-1.5 meta`}
+          aria-label={`${post.comment_count} 条评论`}
+        >
           <IconComment size={15} />
           {post.comment_count}
         </span>
-        <span className="hidden md:inline-flex items-center gap-1.5 meta" aria-label={`${post.view_count} 次浏览`}>
-          <IconEye size={15} />
-          {post.view_count}
-        </span>
-        <LikeButton
-          postId={String(post.id)}
-          liked={post.liked}
-          likeCount={post.like_count}
-          variant="compact"
-        />
+        {showViews && (
+          <span className="hidden md:inline-flex items-center gap-1.5 meta" aria-label={`${post.view_count} 次浏览`}>
+            <IconEye size={15} />
+            {post.view_count}
+          </span>
+        )}
+        {showLike && (
+          <LikeButton
+            postId={String(post.id)}
+            liked={post.liked}
+            likeCount={post.like_count}
+            variant="compact"
+          />
+        )}
       </div>
     </div>
   );