feat(web): visit 204 response, up page header/sort, trim system page

reaction_board/web/static/views/system.js

@@ -92,7 +92,7 @@ export async function renderSystem(root) {
 
     <section class="panel">
       ${sectionHeader("预计下次运行")}
-      <div class="status-grid">
+      <div class="status-grid status-row-3">
         <div><span>搜索发现</span><strong>${escapeHtml(formatDateTime(next.discover))}</strong></div>
         <div><span>每日快照</span><strong>${escapeHtml(formatDateTime(next.snapshot))}</strong></div>
         <div><span>发现周期</span><strong>${system.schedule.discover_minutes} 分钟</strong></div>
@@ -100,21 +100,6 @@ export async function renderSystem(root) {
       <p class="section-note">预计时间按配置和最近任务完成时间推算；实际以常驻进程为准。</p>
     </section>
 
-    <section class="panel">
-      ${sectionHeader("历史收藏夹")}
-      <p class="section-note">系统已不再同步收藏夹；下列统计仅保留历史来源。收藏夹由人工维护，重排序使用 favsort.py。</p>
-      ${(system.folders || []).map((folder) => `
-        <div class="capacity-row">
-          <div class="capacity-label">
-            <span>${escapeHtml(folder.title || String(folder.year))}</span>
-            <strong>${formatCount(folder.media_count)} / ${formatCount(folder.capacity)}</strong>
-          </div>
-          <div class="capacity-track"><span style="width:${Math.min(100, folder.ratio * 100)}%"
-            class="${folder.warning ? "warning" : ""}"></span></div>
-          <p class="section-note">历史快照 ${escapeHtml(formatDateTime(folder.last_ids_at))}</p>
-        </div>`).join("") || emptyState("无历史收藏夹记录")}
-    </section>
-
     <section class="panel">
       ${sectionHeader("授权与备份")}
       <div class="status-grid">