feat(web): home media grid 2-up mobile / 3-up PC, 6 items, drop folder panel

reaction_board/web/static/views/home.js

@@ -43,29 +43,12 @@ function growthCard(item, index) {
   });
 }
 
-function capacity(folders) {
-  if (!folders.length) return "";
-  return `<section class="panel capacity-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。</p>
-    ${folders.map((folder) => `
-      <div class="capacity-row">
-        <div class="capacity-label">
-          <span>${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>
-      </div>`).join("")}
-  </section>`;
-}
-
 export async function renderHome(root) {
   const [overview, published, heat, growth] = await Promise.all([
     api("/api/overview"),
-    api("/api/videos", { sort: "published", within_days: 14, limit: 5 }),
-    api("/api/videos", { sort: "heat", limit: 5 }),
-    api("/api/videos", { sort: "growth", growth_days: 7, limit: 5 }),
+    api("/api/videos", { sort: "published", within_days: 14, limit: 6 }),
+    api("/api/videos", { sort: "heat", limit: 6 }),
+    api("/api/videos", { sort: "growth", growth_days: 7, limit: 6 }),
   ]);
 
   const pending = overview.counts.candidates_pending || 0;
@@ -136,8 +119,6 @@ export async function renderHome(root) {
       ${heatGrid(heat.items)}
     </section>
 
-    ${capacity(overview.folders || [])}
-
     <section class="panel status-panel">
       ${sectionHeader("采集状态")}
       <div class="status-grid">