fix(frontend): 移除易被误认为加载条的顶部阅读进度条

Co-authored-by: Cursor <cursoragent@cursor.com>

frontend/app/globals.css

@@ -2190,16 +2190,3 @@ html.dark .prose-content .shiki span {
   transform: translateY(0);
   outline: none;
 }
-
-/* 阅读进度条 */
-.reading-progress {
-  position: fixed;
-  top: 0;
-  left: 0;
-  right: 0;
-  height: 3px;
-  z-index: 60;
-  background: var(--accent);
-  transform-origin: 0 50%;
-  pointer-events: none;
-}

frontend/app/post/[id]/page.tsx

@@ -27,7 +27,6 @@ import { getMeCached } from "@/lib/serverData";
 import CommentSection from "@/components/CommentSection";
 import PostActions from "@/components/PostActions";
 import LikeButton from "@/components/LikeButton";
-import ReadingProgress from "@/components/ReadingProgress";
 import PostToc, { type TocItem } from "@/components/PostToc";
 import MobilePostBar from "@/components/MobilePostBar";
 import Avatar from "@/components/Avatar";
@@ -454,7 +453,6 @@ export default async function PostDetailPage({ params, searchParams }: PageProps
 
   return (
     <>
-      <ReadingProgress />
       <script type="application/ld+json" dangerouslySetInnerHTML={{ __html: JSON.stringify(jsonLd) }} />
       {/* 移动端浮动操作条：长文阅读中途可点赞 / 跳评论 / 回顶部 */}
       <MobilePostBar postId={id} liked={post.liked} likeCount={post.like_count} />

frontend/components/ReadingProgress.tsx

@@ -1,37 +0,0 @@
-"use client";
-
-import { useEffect, useState } from "react";
-
-export default function ReadingProgress() {
-  const [progress, setProgress] = useState(0);
-
-  useEffect(() => {
-    let raf = 0;
-    const update = () => {
-      raf = 0;
-      const doc = document.documentElement;
-      const max = doc.scrollHeight - doc.clientHeight;
-      setProgress(max > 0 ? Math.min(1, doc.scrollTop / max) : 0);
-    };
-    const onScroll = () => {
-      if (!raf) raf = requestAnimationFrame(update);
-    };
-    update();
-    window.addEventListener("scroll", onScroll, { passive: true });
-    window.addEventListener("resize", onScroll);
-    return () => {
-      window.removeEventListener("scroll", onScroll);
-      window.removeEventListener("resize", onScroll);
-      if (raf) cancelAnimationFrame(raf);
-    };
-  }, []);
-
-  if (progress <= 0) return null;
-  return (
-    <div
-      className="reading-progress"
-      style={{ transform: `scaleX(${progress})`, opacity: progress >= 1 ? 0 : 1 }}
-      aria-hidden="true"
-    />
-  );
-}