feat(web): use history routing and preserve scroll on filter changes

reaction_board/web/static/views/video.js

@@ -46,7 +46,7 @@ export async function renderVideo(root, { params, query }) {
 
   root.innerHTML = `<section class="page video-page">
     <header class="page-head">
-      <a class="back-link" href="#/rank?scope=video&sort=heat">← 返回榜单</a>
+      <a class="back-link" href="/rank?scope=video&sort=heat">← 返回榜单</a>
       <div class="head-actions">
         ${detail.url ? `<a class="button ghost" href="${escapeAttr(detail.url)}" target="_blank" rel="noreferrer">打开 B 站</a>` : ""}
       </div>
@@ -57,7 +57,7 @@ export async function renderVideo(root, { params, query }) {
       <div class="detail-hero-body">
         <h1>${escapeHtml(detail.title)}</h1>
         <div class="detail-meta">
-          ${detail.up_mid ? `<a class="inline-link" href="#/up/${detail.up_mid}">${escapeHtml(detail.up_name || "未知 UP")}</a>` : escapeHtml(detail.up_name || "未知 UP")}
+          ${detail.up_mid ? `<a class="inline-link" href="/up/${detail.up_mid}">${escapeHtml(detail.up_name || "未知 UP")}</a>` : escapeHtml(detail.up_name || "未知 UP")}
           <span>${escapeHtml(formatDate(detail.pubdate))}</span>
           <span>${escapeHtml(formatDuration(detail.duration))}</span>
           ${detail.folder_title ? badge(detail.folder_title) : ""}
@@ -98,7 +98,7 @@ export async function renderVideo(root, { params, query }) {
     ${up ? `<section class="panel">
       <div class="section-head">
         <h2>该 UP 的其他视频</h2>
-        <a class="text-link" href="#/up/${detail.up_mid}">查看 UP 页 →</a>
+        <a class="text-link" href="/up/${detail.up_mid}">查看 UP 页 →</a>
       </div>
       <div class="video-list">
         ${others.length ? others.map((item) => videoCard(item)).join("") : emptyState("没有其他视频")}