diff --git a/containers/marketplace/resources/site/index.html b/containers/marketplace/resources/site/index.html
index c012ea1..1b53c7b 100644
--- a/containers/marketplace/resources/site/index.html
+++ b/containers/marketplace/resources/site/index.html
@@ -6,110 +6,194 @@
 <title>LibrePortal Marketplace</title>
 <link rel="icon" type="image/svg+xml" href="marketplace.svg">
 <style>
-  /* Self-contained by design: no external fonts, scripts or images — the same
-     no-third-party rule as the LibrePortal WebUI. */
+  /* Standalone replica of the LibrePortal App Center — same nebula theme,
+     aurora background and app-card design, so the marketplace looks like the
+     App Center it feeds. Self-contained by design: no external assets. */
   :root {
-    --bg1:#0b1e3a; --bg2:#0e3a5c; --card:rgba(255,255,255,.06);
-    --border:rgba(255,255,255,.14); --text:#e8f0fb; --dim:#9db4cc;
-    --indigo:#6366f1; --indigo-soft:rgba(99,102,241,.28);
-    --teal:#22d3ee;  --teal-soft:rgba(34,211,238,.20);
+    --gradient-from: #1a1442; --gradient-mid: #1b2a5e; --gradient-to: #0f3b6e;
+    --surface-elevated: rgba(255,255,255,0.07);
+    --border: rgba(255,255,255,0.16); --border-color: rgba(255,255,255,0.16);
+    --border-subtle: rgba(255,255,255,0.08);
+    --text-primary: #ffffff; --text-secondary: rgba(255,255,255,0.82); --text-muted: rgba(255,255,255,0.65);
+    --accent: #00d4ff; --accent-hover: #0099cc; --accent-rgb: 0,212,255;
+    --status-success: #28a745; --status-success-hover: #218838; --status-success-rgb: 40,167,69;
+    --status-warning-rgb: 255,193,7;
+    --text-rgb: 255,255,255;
+    --card-bg: linear-gradient(155deg, rgba(255,255,255,0.09) 0%, rgba(0,212,255,0.05) 100%);
+    --card-border: rgba(255,255,255,0.16);
+    --card-shadow: 0 4px 18px rgba(0,0,0,0.30), inset 0 1px 0 rgba(255,255,255,0.06);
+    --card-shadow-hover: 0 10px 32px rgba(0,212,255,0.18), 0 4px 18px rgba(0,0,0,0.40), inset 0 1px 0 rgba(255,255,255,0.10);
+    --input-bg: rgba(255,255,255,0.06); --input-border: rgba(255,255,255,0.18);
+    --sidebar-bg: rgba(0,0,0,0.18);
+  }
+  * { box-sizing: border-box; margin: 0; }
+  html {
+    background:
+      radial-gradient(ellipse at 20% 30%, var(--gradient-mid) 0%, transparent 55%),
+      radial-gradient(ellipse at 80% 70%, var(--gradient-to) 0%, transparent 55%),
+      linear-gradient(135deg, var(--gradient-from) 0%, var(--gradient-from) 40%, var(--gradient-mid) 100%);
+    background-attachment: fixed;
+  }
+  html::before {
+    content: ''; position: fixed; inset: -10%; z-index: -2; pointer-events: none;
+    background:
+      radial-gradient(circle at 12% 88%, rgba(180,90,220,0.32) 0%, transparent 42%),
+      radial-gradient(circle at 88% 12%, rgba(255,120,180,0.22) 0%, transparent 38%),
+      radial-gradient(circle at 18% 22%, rgba(var(--accent-rgb),0.42) 0%, transparent 45%),
+      radial-gradient(circle at 78% 18%, rgba(var(--accent-rgb),0.34) 0%, transparent 42%),
+      radial-gradient(circle at 30% 78%, rgba(var(--accent-rgb),0.30) 0%, transparent 48%),
+      radial-gradient(circle at 82% 80%, rgba(var(--accent-rgb),0.40) 0%, transparent 46%);
+  }
+  html::after {
+    content: ''; position: fixed; inset: 0; z-index: -1; pointer-events: none;
+    background-image:
+      radial-gradient(1.5px 1.5px at 12px 18px, rgba(var(--text-rgb),0.9), transparent 60%),
+      radial-gradient(1px 1px at 47px 92px, rgba(var(--accent-rgb),0.85), transparent 60%),
+      radial-gradient(1.2px 1.2px at 110px 40px, rgba(var(--text-rgb),0.75), transparent 60%),
+      radial-gradient(1px 1px at 165px 130px, rgba(var(--accent-rgb),0.70), transparent 60%);
+    background-size: 200px 200px;
   }
-  * { box-sizing:border-box; margin:0; }
   body {
     font-family: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
-    color:var(--text); min-height:100vh;
-    background: radial-gradient(1200px 700px at 15% -10%, #1c4d7a 0%, transparent 60%),
-                linear-gradient(150deg, var(--bg1), var(--bg2));
+    color: var(--text-primary); min-height: 100vh; background: transparent;
   }
-  .wrap { max-width:1080px; margin:0 auto; padding:32px 20px 64px; }
-  header { display:flex; align-items:center; gap:14px; margin-bottom:6px; }
-  header img { width:44px; height:44px; }
-  h1 { font-size:1.7rem; letter-spacing:.3px; }
-  .tagline { color:var(--dim); margin:4px 0 26px; }
-  .bar { display:flex; gap:10px; flex-wrap:wrap; margin-bottom:18px; }
-  .bar input {
-    flex:1; min-width:220px; padding:10px 14px; border-radius:10px;
-    border:1px solid var(--border); background:var(--card); color:var(--text);
-    font-size:.95rem; outline:none;
+
+  /* Top bar — the App Center chrome. */
+  .topbar {
+    height: 60px; display: flex; align-items: center; gap: 14px; padding: 0 22px;
+    background: rgba(0,0,0,0.22); border-bottom: 1px solid var(--border-color); backdrop-filter: blur(6px);
+    position: sticky; top: 0; z-index: 5;
   }
-  .bar input:focus { border-color:var(--indigo); }
-  .chips { display:flex; gap:8px; flex-wrap:wrap; margin-bottom:22px; }
-  .chip {
-    padding:5px 12px; border-radius:999px; font-size:.8rem; cursor:pointer;
-    border:1px solid var(--border); background:var(--card); color:var(--dim);
+  .topbar img { width: 34px; height: 34px; }
+  .topbar .brand { font-weight: 700; font-size: 1.15rem; letter-spacing: 0.2px; }
+  .topbar .brand b { color: var(--accent); }
+  .topbar .spacer { flex: 1; }
+  .topbar .chip { font-size: 0.8rem; color: var(--text-muted); border: 1px solid var(--border-color); padding: 5px 11px; border-radius: 999px; }
+
+  /* Layout: sidebar + main. */
+  .apps-layout { display: flex; width: 100%; min-height: calc(100vh - 60px); }
+  .sidebar-container { flex-shrink: 0; width: 240px; background: var(--sidebar-bg); border-right: 1px solid var(--border-color); }
+  .sidebar { position: sticky; top: 60px; padding: 18px 12px; }
+  .apps-search { position: relative; margin-bottom: 14px; }
+  .apps-search input {
+    width: 100%; padding: 9px 12px; border-radius: 10px; border: 1px solid var(--input-border);
+    background: var(--input-bg); color: var(--text-primary); font-size: 0.9rem; outline: none;
   }
-  .chip.on { background:var(--indigo-soft); border-color:var(--indigo); color:#c7d2fe; }
-  .grid { display:grid; grid-template-columns:repeat(auto-fill,minmax(300px,1fr)); gap:16px; }
-  .card {
-    background:var(--card); border:1px solid var(--border); border-radius:14px;
-    padding:18px; display:flex; flex-direction:column; gap:10px;
+  .apps-search input:focus { border-color: var(--accent); }
+  .cat-list { display: flex; flex-direction: column; gap: 2px; }
+  .category {
+    display: flex; align-items: center; gap: 10px; padding: 9px 12px; border-radius: 10px;
+    cursor: pointer; color: var(--text-secondary); font-size: 0.92rem; text-transform: capitalize;
+    border: 1px solid transparent;
   }
-  .card .top { display:flex; gap:12px; align-items:center; }
-  .card .icon {
-    width:44px; height:44px; border-radius:10px; background:rgba(255,255,255,.09);
-    display:flex; align-items:center; justify-content:center; overflow:hidden;
-    font-weight:700; font-size:1.2rem; color:#c7d2fe; flex-shrink:0;
+  .category:hover { background: rgba(var(--text-rgb),0.06); color: var(--text-primary); }
+  .category.active { background: rgba(var(--accent-rgb),0.14); border-color: rgba(var(--accent-rgb),0.35); color: #fff; }
+  .category .cat-ic { width: 16px; height: 16px; opacity: 0.9; flex-shrink: 0; }
+  .category .cat-n { margin-left: auto; font-size: 0.75rem; opacity: 0.6; }
+
+  .main-content { flex: 1; min-width: 0; }
+  .status-strip {
+    display: flex; flex-wrap: wrap; gap: 8px 14px; align-items: center; margin: 22px 22px 0; padding: 10px 16px;
+    background: rgba(var(--text-rgb),0.025); border: 1px solid var(--border-subtle); border-radius: 12px; font-size: 0.85rem; color: var(--text-muted);
   }
-  .card .icon img { width:100%; height:100%; object-fit:contain; }
-  .card h2 { font-size:1.05rem; }
-  .tags { display:flex; gap:6px; flex-wrap:wrap; }
-  .tag { font-size:.72rem; padding:2px 9px; border-radius:999px; border:1px solid var(--border); color:var(--dim); }
-  .tag.official { background:var(--teal-soft); border-color:rgba(34,211,238,.5); color:#a5f3fc; }
-  .tag.official::before { content:"✓ "; }
-  .tag.community { background:rgba(245,158,11,.2); border-color:rgba(245,158,11,.5); color:#fcd34d; }
-  .desc { color:var(--dim); font-size:.88rem; line-height:1.45; flex:1; }
-  .addline { display:flex; gap:8px; align-items:center; }
-  .addline code {
-    flex:1; font-size:.78rem; padding:8px 10px; border-radius:8px; overflow-x:auto;
-    background:rgba(0,0,0,.30); border:1px solid var(--border); white-space:nowrap;
-    scrollbar-width:none;
+  .status-strip .ok { color: #67e8f9; font-weight: 600; }
+  .status-strip .warn { color: #fcd34d; font-weight: 600; }
+
+  /* The grid + cards — replicated from the App Center (apps.css). */
+  .apps-section {
+    display: grid; grid-template-columns: repeat(auto-fit, minmax(328px, 1fr)); gap: 20px;
+    margin: 22px; padding: 22px; background: rgba(var(--text-rgb),0.025);
+    border: 1px solid var(--border-subtle); border-radius: 16px;
   }
-  .addline code::-webkit-scrollbar { display:none; }
-  .addline button {
-    padding:8px 14px; border-radius:8px; border:none; cursor:pointer;
-    background:var(--indigo); color:#fff; font-weight:600; font-size:.82rem;
+  .app-card {
+    background: var(--card-bg); border: 1px solid var(--card-border); border-radius: 12px; padding: 20px;
+    display: flex; flex-direction: column; gap: 16px; box-shadow: var(--card-shadow);
+    transition: transform 0.2s, box-shadow 0.2s, border-color 0.2s; min-height: 120px;
   }
-  .addline button:hover { background:#4f46e5; }
-  .empty, .meta { color:var(--dim); font-size:.9rem; }
-  .meta { margin:14px 2px 0; }
-  footer { margin-top:44px; padding-top:18px; border-top:1px solid var(--border); color:var(--dim); font-size:.85rem; line-height:1.6; }
-  footer code { background:rgba(0,0,0,.3); padding:1px 6px; border-radius:6px; }
-  a { color:#93c5fd; }
+  .app-card:hover { transform: translateY(-2px); box-shadow: var(--card-shadow-hover); border-color: rgba(var(--accent-rgb),0.4); }
+  .app-card-top { display: flex; align-items: flex-start; gap: 16px; }
+  .app-card-icon {
+    width: 70px; height: 70px; background: rgba(var(--text-rgb),0.1); border-radius: 12px;
+    display: flex; align-items: center; justify-content: center; padding: 12px;
+    border: 1px solid rgba(var(--text-rgb),0.2); flex-shrink: 0;
+  }
+  .app-card-icon img { width: 100%; height: 100%; object-fit: contain; }
+  .app-card-content { flex: 1; display: flex; flex-direction: column; gap: 8px; min-width: 0; }
+  .app-card-title { font-size: 16px; font-weight: 600; line-height: 1.2; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
+  .app-card-tags { display: flex; flex-wrap: wrap; gap: 8px; }
+  .app-tag {
+    display: inline-flex; align-items: center; gap: 4px; padding: 4px 8px; border-radius: 12px;
+    font-size: 12px; font-weight: 500; border: 1px solid;
+  }
+  .app-tag.description-tag { background: rgba(var(--text-rgb),0.1); color: var(--text-primary); border-color: rgba(var(--text-rgb),0.2); font-style: italic; }
+  .app-tag.category-tag { background: rgba(var(--accent-rgb),0.1); color: var(--accent); border-color: rgba(var(--accent-rgb),0.2); text-transform: capitalize; }
+  .app-tag.available-tag { background: rgba(99,102,241,0.30); color: #a5b4fc; border-color: rgba(99,102,241,0.65); }
+  .app-tag.available-tag::before { content: '↓'; margin-right: 5px; font-weight: 700; line-height: 1; }
+  .app-tag.installed-tag { background: rgba(var(--status-success-rgb),0.35); color: #86efac; border-color: rgba(var(--status-success-rgb),0.70); }
+  .app-tag.installed-tag::before { content: '✓'; margin-right: 5px; font-weight: 700; line-height: 1; }
+  .app-tag.trust-badge { background: rgba(34,211,238,0.22); color: #67e8f9; border-color: rgba(34,211,238,0.55); }
+  .app-tag.trust-badge::before { content: '✓'; margin-right: 5px; font-weight: 700; line-height: 1; }
+  .app-tag.community-badge { background: rgba(var(--status-warning-rgb),0.2); color: #fcd34d; border-color: rgba(var(--status-warning-rgb),0.5); }
+  .app-card-long-description {
+    font-size: 11px; color: var(--text-secondary); line-height: 1.3; font-style: italic;
+    display: -webkit-box; -webkit-line-clamp: 3; -webkit-box-orient: vertical; overflow: hidden;
+  }
+  .app-card-actions { display: flex; gap: 8px; margin-top: auto; }
+  .app-card-actions button {
+    flex: 1; padding: 10px 14px; border-radius: 8px; font-weight: 600; font-size: 0.9rem; cursor: pointer;
+    background: #6366f1; color: #fff; border: 1px solid #6366f1; transition: background 0.15s ease;
+  }
+  .app-card-actions button:hover { background: #4f46e5; border-color: #4f46e5; }
+  .app-card-actions button.copied { background: var(--status-success); border-color: var(--status-success); }
+  .app-card-actions button.installed-btn { background: transparent; border-color: var(--border-color); color: var(--text-secondary); cursor: default; }
+
+  .empty, .footnote { color: var(--text-muted); }
+  .empty { text-align: center; padding: 48px 20px; margin: 22px; border: 1px dashed var(--border-color); border-radius: 12px; }
+  .footnote { margin: 4px 22px 40px; font-size: 0.85rem; line-height: 1.6; }
+  .footnote code { background: rgba(0,0,0,0.3); padding: 1px 6px; border-radius: 6px; }
+  a { color: #93c5fd; }
 </style>
 </head>
 <body>
-<div class="wrap">
-  <header>
+  <div class="topbar">
     <img src="marketplace.svg" alt="">
-    <h1>LibrePortal Marketplace</h1>
-  </header>
-  <p class="tagline">A signed, self-hostable app catalog — browse here, install from your own LibrePortal.</p>
+    <span class="brand">Libre<b>Portal</b> Marketplace</span>
+    <span class="spacer"></span>
+    <span class="chip" id="topchip">loading…</span>
+  </div>
 
-  <div class="bar"><input id="q" type="search" placeholder="Search apps…" autocomplete="off"></div>
-  <div class="chips" id="chips"></div>
-  <div class="grid" id="grid"></div>
-  <p class="empty" id="empty" hidden>Nothing published on this channel yet.</p>
-  <p class="meta" id="meta"></p>
+  <div class="apps-layout">
+    <div class="sidebar-container">
+      <div class="sidebar">
+        <div class="apps-search"><input id="q" type="search" placeholder="Search apps…" autocomplete="off" spellcheck="false"></div>
+        <div class="cat-list" id="cats"></div>
+      </div>
+    </div>
+
+    <div class="main-content">
+      <div class="status-strip" id="status"></div>
+      <div class="apps-section" id="grid"></div>
+      <div class="empty" id="empty" hidden>Nothing published on this channel yet.</div>
+      <p class="footnote">
+        <strong>Add an app:</strong> click a card's <em>Add</em> to copy its command, then run it on your box —
+        or it shows up in your App Center grid as an “Available” card once your box scans this catalog.
+        <strong>Use this marketplace:</strong> point your box's <code>CFG_RELEASE_BASE_URL</code> at this site.
+        <strong>Run your own:</strong> this whole site is the open-source <code>marketplace</code> app (Developer Mode);
+        publish with <code>make_app.sh</code>. Boxes trust only the catalog's signature, never this website.
+      </p>
+    </div>
+  </div>
 
-  <footer>
-    <p><strong>Add an app:</strong> copy its command into your LibrePortal box's terminal, or find it
-    on your App Center's grid as an “Available” card once your box scans this catalog.</p>
-    <p><strong>Use this marketplace from your box:</strong> set <code>CFG_RELEASE_BASE_URL</code> to this
-    site's address. <strong>Run your own:</strong> this whole site is the open-source
-    <code>marketplace</code> app that ships with LibrePortal (Developer&nbsp;Mode) — publish with
-    <code>make_app.sh</code> and serve the same signed files. Boxes only ever trust the minisign
-    signature on the catalog, never this website.</p>
-  </footer>
-</div>
 <script>
 (function () {
   'use strict';
   var CHANNELS = ['stable', 'edge'];
   var state = { apps: [], cat: 'all', q: '' };
   var grid = document.getElementById('grid');
-  var chips = document.getElementById('chips');
+  var cats = document.getElementById('cats');
   var empty = document.getElementById('empty');
-  var meta = document.getElementById('meta');
+  var status = document.getElementById('status');
+  var topchip = document.getElementById('topchip');
 
   function esc(s) {
     return String(s == null ? '' : s).replace(/[&<>"']/g, function (c) {
@@ -117,6 +201,57 @@
     });
   }
 
+  function counts() {
+    var by = {};
+    state.apps.forEach(function (a) { if (a.category) by[a.category] = (by[a.category] || 0) + 1; });
+    return by;
+  }
+
+  function renderCats() {
+    var by = counts();
+    var list = Object.keys(by).sort();
+    var rows = ['<div class="category' + (state.cat === 'all' ? ' active' : '') + '" data-cat="all">' +
+      '<svg class="cat-ic" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2"><rect x="3" y="3" width="7" height="7"/><rect x="14" y="3" width="7" height="7"/><rect x="14" y="14" width="7" height="7"/><rect x="3" y="14" width="7" height="7"/></svg>' +
+      '<span>All</span><span class="cat-n">' + state.apps.length + '</span></div>'];
+    list.forEach(function (c) {
+      rows.push('<div class="category' + (state.cat === c ? ' active' : '') + '" data-cat="' + esc(c) + '">' +
+        '<svg class="cat-ic" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2"><circle cx="12" cy="12" r="9"/></svg>' +
+        '<span>' + esc(c) + '</span><span class="cat-n">' + by[c] + '</span></div>');
+    });
+    cats.innerHTML = rows.join('');
+  }
+
+  function card(a) {
+    var iconInner = a.icon
+      ? '<img src="' + esc(a.icon) + '" alt="" onerror="this.style.display=\'none\'">'
+      : '<img src="marketplace.svg" alt="">';
+    var trust = a.trust === 'official'
+      ? '<span class="app-tag trust-badge">Official</span>'
+      : '<span class="app-tag community-badge">' + esc(a.trust) + '</span>';
+    var stateTag = a.installed
+      ? '<span class="app-tag installed-tag">Installed</span>'
+      : '<span class="app-tag available-tag">Available</span>';
+    var descTag = a.description
+      ? '<span class="app-tag description-tag">' + esc(a.description) + '</span>' : '';
+    var btn = a.installed
+      ? '<button class="installed-btn" disabled>Installed</button>'
+      : '<button data-slug="' + esc(a.slug) + '">Add</button>';
+    return '<div class="app-card">' +
+      '<div class="app-card-top">' +
+        '<div class="app-card-icon">' + iconInner + '</div>' +
+        '<div class="app-card-content">' +
+          '<div class="app-card-title">' + esc(a.title) + '</div>' +
+          '<div class="app-card-tags">' + descTag +
+            '<span class="app-tag category-tag">' + esc(a.category || 'app') + '</span>' +
+            stateTag + trust +
+          '</div>' +
+        '</div>' +
+      '</div>' +
+      (a.long_description ? '<div class="app-card-long-description">' + esc(a.long_description) + '</div>' : '') +
+      '<div class="app-card-actions">' + btn + '</div>' +
+    '</div>';
+  }
+
   function render() {
     var q = state.q.toLowerCase();
     var shown = state.apps.filter(function (a) {
@@ -124,88 +259,65 @@
       if (q && (a.title + ' ' + a.description + ' ' + a.long_description + ' ' + a.slug).toLowerCase().indexOf(q) < 0) return false;
       return true;
     });
-    grid.innerHTML = shown.map(function (a) {
-      var iconInner = a.icon
-        ? '<img src="' + esc(a.icon) + '" alt="" onerror="this.parentNode.textContent=' + "'" + esc((a.title || '?')[0].toUpperCase()) + "'" + '">'
-        : esc((a.title || '?')[0].toUpperCase());
-      var trust = a.trust === 'official'
-        ? '<span class="tag official">Official</span>'
-        : '<span class="tag community">' + esc(a.trust) + '</span>';
-      return '<div class="card">' +
-        '<div class="top"><div class="icon">' + iconInner + '</div><div>' +
-          '<h2>' + esc(a.title) + '</h2>' +
-          '<div class="tags"><span class="tag">' + esc(a.category || 'app') + '</span>' + trust +
-          '<span class="tag">v' + esc(a.version) + '</span></div>' +
-        '</div></div>' +
-        '<p class="desc">' + esc(a.long_description || a.description) + '</p>' +
-        '<div class="addline"><code>libreportal app add ' + esc(a.slug) + '</code>' +
-        '<button data-slug="' + esc(a.slug) + '">Copy</button></div>' +
-      '</div>';
-    }).join('');
+    grid.innerHTML = shown.map(card).join('');
+    grid.style.display = shown.length ? '' : 'none';
     empty.hidden = shown.length > 0;
+    if (state.q || state.cat !== 'all') { empty.textContent = 'Nothing matches your filter.'; }
   }
 
-  function renderChips(cats) {
-    var all = ['all'].concat(cats);
-    chips.innerHTML = all.map(function (c) {
-      return '<span class="chip' + (c === state.cat ? ' on' : '') + '" data-cat="' + esc(c) + '">' + esc(c) + '</span>';
-    }).join('');
+  function setStatus(idx, ch, signed) {
+    var avail = state.apps.filter(function (a) { return !a.installed; }).length;
+    // The website can't verify signatures (boxes do) — only report whether a
+    // detached signature is published alongside the catalog.
+    status.innerHTML =
+      (signed ? '<span class="ok">✓ signed</span>' : '<span class="warn">unsigned</span>') +
+      '<span>' + avail + ' available</span>' +
+      '<span>' + state.apps.length + ' apps</span>' +
+      '<span>channel ' + esc(ch) + '</span>' +
+      '<span>serial ' + esc(String(idx.index_serial != null ? idx.index_serial : '?')) + '</span>' +
+      '<span>published ' + esc(idx.generated_at || '?') + '</span>';
+    topchip.textContent = state.apps.length + ' apps · ' + ch;
   }
 
   function load(i) {
     i = i || 0;
-    if (i >= CHANNELS.length) { empty.hidden = false; return; }
+    if (i >= CHANNELS.length) { grid.style.display = 'none'; empty.hidden = false; topchip.textContent = 'no catalog'; status.innerHTML = '<span class="warn">No catalog published on this host yet.</span>'; return; }
     var ch = CHANNELS[i];
     fetch(ch + '/index.json', { cache: 'no-store' })
       .then(function (r) { if (!r.ok) throw 0; return r.json(); })
       .then(function (idx) {
         state.apps = (idx.artifacts || []).filter(function (a) {
-          return a && a.type === 'app' && a.payload && a.payload.kind === 'bundle' &&
-                 a.applies_when && a.applies_when.app;
+          return a && a.type === 'app' && a.payload && a.payload.kind === 'bundle' && a.applies_when && a.applies_when.app;
         }).map(function (a) {
           var m = a.meta || {};
           return {
             slug: a.applies_when.app, title: a.title || a.applies_when.app,
-            description: m.description || a.why || '',
-            long_description: m.long_description || '',
-            category: (m.category || '').toLowerCase(),
-            trust: a.trust || 'official', version: a.version || 1,
+            description: m.description || a.why || '', long_description: m.long_description || '',
+            category: (m.category || '').toLowerCase(), trust: a.trust || 'official',
+            version: a.version || 1, installed: false,
             icon: m.icon ? ch + '/payloads/icons/' + a.applies_when.app + '.' + m.icon.split('.').pop() : null
           };
         });
-        var cats = [];
-        state.apps.forEach(function (a) { if (a.category && cats.indexOf(a.category) < 0) cats.push(a.category); });
-        renderChips(cats.sort());
-        meta.textContent = state.apps.length + ' app(s) · channel: ' + ch + ' · catalog serial ' + (idx.index_serial || '?') +
-          ' · published ' + (idx.generated_at || '?');
-        render();
+        renderCats(); render();
+        fetch(ch + '/index.json.minisig', { method: 'HEAD', cache: 'no-store' })
+          .then(function (r) { setStatus(idx, ch, r.ok); })
+          .catch(function () { setStatus(idx, ch, false); });
       })
       .catch(function () { load(i + 1); });
   }
 
-  chips.addEventListener('click', function (e) {
-    var c = e.target.getAttribute && e.target.getAttribute('data-cat');
-    if (!c) return;
-    state.cat = c;
-    renderChips(state.apps.reduce(function (acc, a) {
-      if (a.category && acc.indexOf(a.category) < 0) acc.push(a.category);
-      return acc;
-    }, []).sort());
-    render();
+  cats.addEventListener('click', function (e) {
+    var el = e.target.closest('[data-cat]'); if (!el) return;
+    state.cat = el.getAttribute('data-cat'); renderCats(); render();
   });
   grid.addEventListener('click', function (e) {
-    var slug = e.target.getAttribute && e.target.getAttribute('data-slug');
-    if (!slug) return;
-    var txt = 'libreportal app add ' + slug;
-    (navigator.clipboard ? navigator.clipboard.writeText(txt) : Promise.reject())
-      .then(function () { e.target.textContent = 'Copied!'; })
-      .catch(function () { e.target.textContent = txt; })
-      .finally ? null : null;
-    setTimeout(function () { e.target.textContent = 'Copy'; }, 1600);
-  });
-  document.getElementById('q').addEventListener('input', function (e) {
-    state.q = e.target.value; render();
+    var b = e.target.closest('button[data-slug]'); if (!b) return;
+    var txt = 'libreportal app add ' + b.getAttribute('data-slug');
+    var done = function () { b.textContent = 'Copied ✓'; b.classList.add('copied'); setTimeout(function () { b.textContent = 'Add'; b.classList.remove('copied'); }, 1600); };
+    if (navigator.clipboard) navigator.clipboard.writeText(txt).then(done, function () { b.textContent = txt; });
+    else done();
   });
+  document.getElementById('q').addEventListener('input', function (e) { state.q = e.target.value; render(); });
 
   load();
 })();