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<!DOCTYPE html>
<html lang="zh-CN">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0, user-scalable=no">
<meta name="apple-mobile-web-app-capable" content="yes">
<meta name="apple-mobile-web-app-status-bar-style" content="black-translucent">
<meta name="theme-color" content="#0a0e17">
<link rel="manifest" href="manifest.json">
<link rel="apple-touch-icon" href="icon.png">
<title>Server Monitor</title>
<link href="https://fonts.googleapis.com/css2?family=JetBrains+Mono:wght@300;400;500;600;700&family=DM+Sans:wght@400;500;600;700&display=swap" rel="stylesheet">
<style>
*,*::before,*::after{margin:0;padding:0;box-sizing:border-box}
:root{
  --bg:#0a0e17;--surface:#111827;--surface2:#1a2332;--border:#1e2d3d;
  --text:#e2e8f0;--text2:#8b9dc3;--text3:#4a5e78;
  --green:#22c55e;--green-dim:#0a3d1f;--yellow:#eab308;--yellow-dim:#3d3408;
  --red:#ef4444;--red-dim:#3d0a0a;--blue:#3b82f6;--cyan:#06b6d4;
  --glow-green:0 0 20px rgba(34,197,94,.15);
  --glow-red:0 0 20px rgba(239,68,68,.15);
}
html,body{background:var(--bg);color:var(--text);font-family:'DM Sans',sans-serif;
  min-height:100vh;overflow-x:hidden;-webkit-font-smoothing:antialiased}
body::before{content:'';position:fixed;inset:0;z-index:9999;pointer-events:none;
  opacity:.03;background-image:url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E")}

.app{max-width:520px;margin:0 auto;padding:16px 16px 80px;position:relative}

/* Header */
.header{display:flex;align-items:center;justify-content:space-between;
  padding:16px 0 20px;border-bottom:1px solid var(--border);margin-bottom:16px}
.header-left{display:flex;align-items:center;gap:10px}
.logo{width:32px;height:32px;border-radius:8px;
  background:linear-gradient(135deg,var(--cyan),var(--blue));
  display:flex;align-items:center;justify-content:center;
  font-family:'JetBrains Mono',monospace;font-weight:700;font-size:14px;color:#fff;
  box-shadow:0 0 24px rgba(6,182,212,.2)}
.header h1{font-size:16px;font-weight:600;letter-spacing:-.02em}
.header-meta{text-align:right}
.header-meta .time{font-family:'JetBrains Mono',monospace;font-size:11px;color:var(--text2)}
.header-meta .status{font-size:10px;color:var(--green);display:flex;align-items:center;gap:4px;justify-content:flex-end;margin-top:2px}
.header-meta .status::before{content:'';width:6px;height:6px;border-radius:50%;background:var(--green);
  animation:pulse-dot 2s ease-in-out infinite}
@keyframes pulse-dot{0%,100%{opacity:1}50%{opacity:.4}}

/* ===== GRID VIEW (overview) ===== */
.grid{display:grid;grid-template-columns:1fr 1fr;gap:12px}

.grid-card{background:var(--surface);border:1px solid var(--border);border-radius:14px;
  padding:16px;position:relative;overflow:hidden;cursor:pointer;
  transition:transform .15s,box-shadow .15s;
  animation:card-in .4s cubic-bezier(.16,1,.3,1) backwards}
.grid-card:nth-child(1){animation-delay:.05s}
.grid-card:nth-child(2){animation-delay:.1s}
.grid-card:nth-child(3){animation-delay:.15s}
.grid-card:nth-child(4){animation-delay:.2s}
@keyframes card-in{from{opacity:0;transform:translateY(12px)}}
.grid-card:active{transform:scale(.97)}

.grid-card::before{content:'';position:absolute;top:0;left:0;right:0;height:2px;
  background:linear-gradient(90deg,var(--cyan),var(--blue));opacity:.6}
.grid-card.warn::before{background:linear-gradient(90deg,var(--yellow),#f59e0b)}
.grid-card.danger::before{background:linear-gradient(90deg,var(--red),#dc2626)}

.grid-dot{width:8px;height:8px;border-radius:50%;background:var(--green);
  box-shadow:var(--glow-green);display:inline-block;vertical-align:middle;margin-right:6px}
.grid-dot.offline{background:var(--red);box-shadow:var(--glow-red);animation:blink 1s step-end infinite}
@keyframes blink{50%{opacity:.3}}

.grid-hostname{font-family:'JetBrains Mono',monospace;font-size:12px;font-weight:600;
  white-space:nowrap;overflow:hidden;text-overflow:ellipsis;margin-bottom:10px}
.grid-age{font-family:'JetBrains Mono',monospace;font-size:9px;color:var(--text3);
  display:block;margin-top:2px;margin-left:14px}

.grid-stats{display:flex;flex-direction:column;gap:8px}
.grid-stat{display:flex;align-items:center;gap:6px}
.grid-stat-label{font-family:'JetBrains Mono',monospace;font-size:9px;color:var(--text3);
  width:28px;flex-shrink:0;text-transform:uppercase}
.grid-stat-bar{flex:1;height:6px;background:var(--surface2);border-radius:3px;overflow:hidden}
.grid-stat-fill{height:100%;border-radius:3px;transition:width .6s cubic-bezier(.16,1,.3,1)}
.grid-stat-val{font-family:'JetBrains Mono',monospace;font-size:10px;font-weight:600;width:32px;text-align:right}

.grid-gpu-summary{font-family:'JetBrains Mono',monospace;font-size:9px;color:var(--text3);
  margin-top:8px;padding-top:8px;border-top:1px solid var(--border)}

/* ===== DETAIL VIEW ===== */
.detail-overlay{position:fixed;inset:0;background:var(--bg);z-index:150;
  overflow-y:auto;-webkit-overflow-scrolling:touch;
  transform:translateX(100%);transition:transform .3s cubic-bezier(.16,1,.3,1)}
.detail-overlay.open{transform:translateX(0)}

.detail-inner{max-width:520px;margin:0 auto;padding:16px 16px 40px}

.detail-back{display:flex;align-items:center;gap:6px;
  font-family:'JetBrains Mono',monospace;font-size:12px;color:var(--cyan);
  background:none;border:none;cursor:pointer;padding:12px 0;margin-bottom:8px}
.detail-back::before{content:'<';font-size:14px}

.detail-head{display:flex;align-items:center;justify-content:space-between;
  margin-bottom:20px;padding-bottom:14px;border-bottom:1px solid var(--border)}
.detail-host{display:flex;align-items:center;gap:10px}
.detail-host .dot{width:10px;height:10px;border-radius:50%;background:var(--green);box-shadow:var(--glow-green)}
.detail-host .dot.offline{background:var(--red);box-shadow:var(--glow-red);animation:blink 1s step-end infinite}
.detail-host h2{font-family:'JetBrains Mono',monospace;font-size:16px;font-weight:700}
.detail-age{font-family:'JetBrains Mono',monospace;font-size:10px;color:var(--text3);
  background:var(--surface2);padding:4px 10px;border-radius:6px}

/* Stats row */
.stats{display:grid;grid-template-columns:1fr 1fr 1fr;gap:10px;margin-bottom:18px}
.stat{background:var(--surface);border:1px solid var(--border);border-radius:12px;padding:12px}
.stat-label{font-size:9px;color:var(--text3);text-transform:uppercase;letter-spacing:.06em;
  font-family:'JetBrains Mono',monospace;margin-bottom:4px}
.stat-value{font-family:'JetBrains Mono',monospace;font-size:22px;font-weight:700;letter-spacing:-.02em}
.stat-bar{height:3px;background:var(--border);border-radius:2px;margin-top:6px;overflow:hidden}
.stat-bar-fill{height:100%;border-radius:2px;transition:width .8s cubic-bezier(.16,1,.3,1)}
.stat-sub{font-family:'JetBrains Mono',monospace;font-size:9px;color:var(--text3);margin-top:3px}

/* GPU Section */
.section-title{font-family:'JetBrains Mono',monospace;font-size:10px;color:var(--text3);
  text-transform:uppercase;letter-spacing:.08em;margin-bottom:10px;margin-top:6px;
  display:flex;align-items:center;gap:8px}
.section-title::before{content:'';flex:0 0 12px;height:1px;background:var(--border)}
.section-title::after{content:'';flex:1;height:1px;background:var(--border)}

.gpu-card{background:var(--surface);border:1px solid var(--border);border-radius:10px;
  padding:12px;margin-bottom:8px}
.gpu-card.hot{border-color:rgba(239,68,68,.3)}
.gpu-head{display:flex;justify-content:space-between;align-items:center;margin-bottom:8px}
.gpu-name{font-family:'JetBrains Mono',monospace;font-size:11px;font-weight:500;color:var(--text2)}
.gpu-temp{font-family:'JetBrains Mono',monospace;font-size:12px;font-weight:600}
.gpu-meters{display:grid;grid-template-columns:1fr 1fr;gap:8px}
.gpu-meter-label{font-size:9px;color:var(--text3);font-family:'JetBrains Mono',monospace;
  margin-bottom:3px;display:flex;justify-content:space-between}
.gpu-meter-bar{height:4px;background:var(--border);border-radius:2px;overflow:hidden}
.gpu-meter-fill{height:100%;border-radius:2px;transition:width .8s cubic-bezier(.16,1,.3,1)}

/* Tasks */
.task-item{display:flex;align-items:center;gap:8px;padding:8px 0;
  border-bottom:1px solid rgba(30,45,61,.5)}
.task-item:last-child{border-bottom:none}
.task-gpu-badge{font-family:'JetBrains Mono',monospace;font-size:9px;
  background:rgba(59,130,246,.15);color:var(--blue);padding:2px 6px;border-radius:4px;flex-shrink:0}
.task-cmd{font-family:'JetBrains Mono',monospace;font-size:11px;color:var(--text2);
  white-space:nowrap;overflow:hidden;text-overflow:ellipsis;flex:1}
.task-dur{font-family:'JetBrains Mono',monospace;font-size:9px;color:var(--text3);flex-shrink:0}

/* Shared */
.empty{text-align:center;padding:60px 20px}
.empty-icon{font-size:40px;margin-bottom:12px;opacity:.3}
.empty-text{font-size:14px;color:var(--text3)}
.loading{text-align:center;padding:80px 20px}
.loading-spinner{width:32px;height:32px;border:2px solid var(--border);
  border-top-color:var(--cyan);border-radius:50%;margin:0 auto 16px;animation:spin .8s linear infinite}
@keyframes spin{to{transform:rotate(360deg)}}
.loading-text{font-family:'JetBrains Mono',monospace;font-size:12px;color:var(--text3)}
.error-banner{background:var(--red-dim);border:1px solid rgba(239,68,68,.3);
  border-radius:10px;padding:12px 16px;margin-bottom:16px;
  font-family:'JetBrains Mono',monospace;font-size:11px;color:var(--red)}

.c-green{color:var(--green)}.c-yellow{color:var(--yellow)}.c-red{color:var(--red)}
.bg-green{background:var(--green)}.bg-yellow{background:var(--yellow)}.bg-red{background:var(--red)}
.bg-blue{background:var(--blue)}.bg-cyan{background:var(--cyan)}

/* Bottom bar */
.settings-bar{position:fixed;bottom:0;left:0;right:0;
  background:rgba(10,14,23,.92);backdrop-filter:blur(16px);-webkit-backdrop-filter:blur(16px);
  border-top:1px solid var(--border);padding:12px 16px;z-index:100;
  display:flex;align-items:center;justify-content:center;gap:16px}
.settings-bar .info{font-family:'JetBrains Mono',monospace;font-size:10px;color:var(--text3)}
.countdown{color:var(--cyan)}
.btn{background:var(--surface);border:1px solid var(--border);border-radius:8px;
  padding:6px 10px;color:var(--text2);font-size:11px;font-family:'JetBrains Mono',monospace;
  cursor:pointer;transition:all .2s}
.btn:active{transform:scale(.95);background:var(--surface2)}

/* Token overlay */
.token-overlay{position:fixed;inset:0;background:rgba(0,0,0,.85);z-index:200;
  display:flex;align-items:center;justify-content:center;padding:20px}
.token-box{background:var(--surface);border:1px solid var(--border);border-radius:16px;
  padding:28px 24px;width:100%;max-width:400px}
.token-box h2{font-size:16px;margin-bottom:6px}
.token-box p{font-size:12px;color:var(--text2);margin-bottom:16px}
.token-box input{width:100%;padding:10px 14px;background:var(--bg);border:1px solid var(--border);
  border-radius:8px;color:var(--text);font-family:'JetBrains Mono',monospace;font-size:13px;outline:none}
.token-box input:focus{border-color:var(--cyan)}
.token-box .btn-row{display:flex;gap:8px;margin-top:12px}
.token-box button{flex:1;padding:10px;border-radius:8px;font-size:13px;font-weight:600;
  cursor:pointer;border:none;transition:all .15s}
.btn-primary{background:var(--cyan);color:#000}
.btn-primary:active{transform:scale(.97)}
.btn-secondary{background:var(--surface2);color:var(--text2);border:1px solid var(--border) !important}
</style>
</head>
<body>

<div class="app" id="app">
  <header class="header">
    <div class="header-left">
      <div class="logo">SM</div>
      <h1>Server Monitor</h1>
    </div>
    <div class="header-meta">
      <div class="time" id="clock"></div>
      <div class="status" id="status-line">LIVE</div>
    </div>
  </header>
  <div id="error-container"></div>
  <div id="server-list">
    <div class="loading"><div class="loading-spinner"></div>
    <div class="loading-text">Connecting...</div></div>
  </div>
</div>

<!-- Detail slide-in panel -->
<div class="detail-overlay" id="detail-overlay">
  <div class="detail-inner" id="detail-content"></div>
</div>

<div class="settings-bar">
  <button class="btn" onclick="fetchData()">REFRESH</button>
  <span class="info">next <span class="countdown" id="countdown">60</span>s</span>
  <button class="btn" onclick="showTokenDialog()">TOKEN</button>
</div>

<div class="token-overlay" id="token-overlay" style="display:none">
  <div class="token-box">
    <h2>HuggingFace Token</h2>
    <p>Repo is private. Enter your read token to view data.</p>
    <input type="password" id="token-input" placeholder="hf_xxxxx" autocomplete="off">
    <div class="btn-row">
      <button class="btn-secondary" onclick="closeTokenDialog()">Cancel</button>
      <button class="btn-primary" onclick="saveToken()">Save</button>
    </div>
  </div>
</div>

<script>
const REPO = 'Wendy-Fly/Truck_2026';
const MONITOR_DIR = 'monitor';
const REFRESH_INTERVAL = 60;
let countdown = REFRESH_INTERVAL, timer = null;
let serverData = []; // cached for detail view

// --- Helpers ---
function updateClock() {
  document.getElementById('clock').textContent =
    new Date().toLocaleTimeString('en-GB', { hour12: false });
}
setInterval(updateClock, 1000); updateClock();

function getToken() { return localStorage.getItem('hf_token') || ''; }
function showTokenDialog() {
  document.getElementById('token-overlay').style.display = 'flex';
  document.getElementById('token-input').value = getToken();
}
function closeTokenDialog() { document.getElementById('token-overlay').style.display = 'none'; }
function saveToken() {
  const t = document.getElementById('token-input').value.trim();
  if (t) localStorage.setItem('hf_token', t); else localStorage.removeItem('hf_token');
  closeTokenDialog(); fetchData();
}

function startCountdown() {
  countdown = REFRESH_INTERVAL;
  if (timer) clearInterval(timer);
  timer = setInterval(() => {
    countdown--;
    document.getElementById('countdown').textContent = countdown;
    if (countdown <= 0) fetchData();
  }, 1000);
}

function pctColor(p) { return p >= 90 ? 'red' : p >= 70 ? 'yellow' : 'green'; }
function tempColor(t) { return t >= 85 ? 'red' : t >= 70 ? 'yellow' : 'green'; }

function formatAge(ts) {
  if (!ts) return 'unknown';
  const m = Math.floor((Date.now() - new Date(ts).getTime()) / 60000);
  if (m < 1) return 'just now';
  if (m < 60) return m + 'min ago';
  const h = Math.floor(m / 60);
  if (h < 24) return h + 'h' + (m % 60) + 'm';
  return Math.floor(h / 24) + 'd ago';
}
function formatDuration(since) {
  if (!since) return '--';
  const ms = Date.now() - new Date(since).getTime();
  const h = Math.floor(ms / 3600000), m = Math.floor((ms % 3600000) / 60000);
  if (h > 24) return Math.floor(h / 24) + 'd ' + (h % 24) + 'h';
  if (h > 0) return h + 'h ' + m + 'm';
  return m + 'm';
}
function isOffline(ts) { return !ts || (Date.now() - new Date(ts).getTime()) > 15 * 60000; }

function gpuVramPct(g) {
  if (g.memory_percent != null) return g.memory_percent;
  return g.memory_total_mb > 0 ? g.memory_used_mb / g.memory_total_mb * 100 : 0;
}
function escHtml(s) { const d = document.createElement('div'); d.textContent = s || ''; return d.innerHTML; }

// --- GRID CARD (compact overview) ---
function renderGridCard(data, idx) {
  const hw = data.hardware || {};
  const gpus = hw.gpus || [];
  const offline = isOffline(data.timestamp);
  const cpuPct = hw.cpu_percent || 0;
  const gpuAvg = gpus.length > 0 ? Math.round(gpus.reduce((s,g) => s + gpuVramPct(g), 0) / gpus.length) : 0;
  const gpuMax = gpus.length > 0 ? Math.round(Math.max(...gpus.map(gpuVramPct))) : 0;
  const maxPct = Math.max(cpuPct, gpuMax);
  const cls = offline ? 'danger' : maxPct >= 90 ? 'danger' : maxPct >= 70 ? 'warn' : '';

  // Count busy GPUs (>10% VRAM)
  const busyGpus = gpus.filter(g => gpuVramPct(g) > 10).length;

  return `
    <div class="grid-card ${cls}" onclick="showDetail(${idx})">
      <div class="grid-hostname">
        <span class="grid-dot ${offline ? 'offline' : ''}"></span>${escHtml(data.hostname)}
        <span class="grid-age">${formatAge(data.timestamp)}</span>
      </div>
      <div class="grid-stats">
        <div class="grid-stat">
          <span class="grid-stat-label">CPU</span>
          <div class="grid-stat-bar"><div class="grid-stat-fill bg-${pctColor(cpuPct)}" style="width:${cpuPct}%"></div></div>
          <span class="grid-stat-val c-${pctColor(cpuPct)}">${Math.round(cpuPct)}%</span>
        </div>
        <div class="grid-stat">
          <span class="grid-stat-label">GPU</span>
          <div class="grid-stat-bar"><div class="grid-stat-fill bg-${pctColor(gpuAvg)}" style="width:${gpuAvg}%"></div></div>
          <span class="grid-stat-val c-${pctColor(gpuAvg)}">${gpuAvg}%</span>
        </div>
      </div>
      <div class="grid-gpu-summary">${gpus.length} GPU${gpus.length > 1 ? 's' : ''} · ${busyGpus} busy</div>
    </div>`;
}

// --- DETAIL VIEW (full info) ---
function renderDetail(data) {
  const hw = data.hardware || {};
  const gpus = hw.gpus || [];
  const tasks = data.tasks || [];
  const offline = isOffline(data.timestamp);
  const cpuPct = hw.cpu_percent || 0;
  const memPct = hw.memory_percent || 0;
  const diskPct = hw.disk_percent || 0;
  const gpuAvg = gpus.length > 0 ? Math.round(gpus.reduce((s,g) => s + gpuVramPct(g), 0) / gpus.length) : 0;

  let gpuHtml = '';
  if (gpus.length) {
    gpuHtml = `<div class="section-title">GPUs (${gpus.length})</div>`;
    for (const g of gpus) {
      const vp = Math.round(gpuVramPct(g));
      const temp = g.temp_c != null ? g.temp_c : null;
      const tc = temp != null ? tempColor(temp) : 'green';
      gpuHtml += `
        <div class="gpu-card ${temp >= 85 ? 'hot' : ''}">
          <div class="gpu-head">
            <span class="gpu-name">#${g.id} ${g.name}</span>
            <span class="gpu-temp c-${tc}">${temp != null ? temp + '°C' : ''}</span>
          </div>
          <div class="gpu-meters">
            <div>
              <div class="gpu-meter-label"><span>VRAM</span><span>${vp}%</span></div>
              <div class="gpu-meter-bar"><div class="gpu-meter-fill bg-${pctColor(vp)}" style="width:${vp}%"></div></div>
            </div>
            <div>
              <div class="gpu-meter-label"><span>MEM</span><span>${Math.round(g.memory_used_mb/1024)}/${Math.round(g.memory_total_mb/1024)}G</span></div>
              <div class="gpu-meter-bar"><div class="gpu-meter-fill bg-${pctColor(vp)}" style="width:${vp}%"></div></div>
            </div>
          </div>
        </div>`;
    }
  }

  let tasksHtml = '';
  if (tasks.length) {
    tasksHtml = `<div class="section-title">Running Tasks (${tasks.length})</div>`;
    for (const t of tasks) {
      tasksHtml += `
        <div class="task-item">
          <span class="task-gpu-badge">GPU${t.gpu_id >= 0 ? t.gpu_id : '?'}</span>
          <span class="task-cmd" title="${escHtml(t.command)}">${escHtml(t.command)}</span>
          <span class="task-dur">${formatDuration(t.running_since)}</span>
        </div>`;
    }
  } else {
    tasksHtml = `<div class="section-title">Tasks</div><div style="font-size:12px;color:var(--text3);padding:8px 0">No running tasks</div>`;
  }

  return `
    <button class="detail-back" onclick="hideDetail()">Back</button>
    <div class="detail-head">
      <div class="detail-host">
        <span class="dot ${offline ? 'offline' : ''}"></span>
        <h2>${escHtml(data.hostname)}</h2>
      </div>
      <span class="detail-age">${formatAge(data.timestamp)}</span>
    </div>
    <div class="stats">
      <div class="stat">
        <div class="stat-label">CPU</div>
        <div class="stat-value c-${pctColor(cpuPct)}">${cpuPct}<small>%</small></div>
        <div class="stat-bar"><div class="stat-bar-fill bg-${pctColor(cpuPct)}" style="width:${cpuPct}%"></div></div>
      </div>
      <div class="stat">
        <div class="stat-label">GPU AVG</div>
        <div class="stat-value c-${pctColor(gpuAvg)}">${gpuAvg}<small>%</small></div>
        <div class="stat-bar"><div class="stat-bar-fill bg-${pctColor(gpuAvg)}" style="width:${gpuAvg}%"></div></div>
        <div class="stat-sub">${gpus.length}x GPU</div>
      </div>
      <div class="stat">
        <div class="stat-label">${diskPct ? 'DISK' : memPct ? 'MEM' : 'MEM'}</div>
        <div class="stat-value c-${pctColor(diskPct || memPct)}">${diskPct || memPct || '--'}<small>${(diskPct || memPct) ? '%' : ''}</small></div>
        <div class="stat-bar"><div class="stat-bar-fill bg-${pctColor(diskPct || memPct)}" style="width:${diskPct || memPct || 0}%"></div></div>
        <div class="stat-sub">${hw.memory_used_gb ? hw.memory_used_gb + '/' + hw.memory_total_gb + 'G' : ''}</div>
      </div>
    </div>
    ${gpuHtml}
    ${tasksHtml}`;
}

function showDetail(idx) {
  const data = serverData[idx];
  if (!data) return;
  document.getElementById('detail-content').innerHTML = renderDetail(data);
  document.getElementById('detail-overlay').classList.add('open');
}
function hideDetail() {
  document.getElementById('detail-overlay').classList.remove('open');
}

// --- FETCH ---
async function fetchData() {
  countdown = REFRESH_INTERVAL;
  const token = getToken();
  const headers = token ? { 'Authorization': 'Bearer ' + token } : {};
  const errorEl = document.getElementById('error-container');
  const listEl = document.getElementById('server-list');

  try {
    const treeUrl = `https://huggingface.co/api/datasets/${REPO}/tree/main/${MONITOR_DIR}`;
    const treeResp = await fetch(treeUrl, { headers });

    if (!treeResp.ok) {
      if (treeResp.status === 401 || treeResp.status === 403) {
        errorEl.innerHTML = `<div class="error-banner">Access denied. Click TOKEN below to enter your HF token.</div>`;
        listEl.innerHTML = ''; return;
      }
      if (treeResp.status === 404) {
        listEl.innerHTML = `<div class="empty"><div class="empty-icon">~/</div><div class="empty-text">No monitor/ directory yet.<br>Start a server agent first.</div></div>`;
        errorEl.innerHTML = ''; return;
      }
      throw new Error(`API ${treeResp.status}`);
    }

    const files = await treeResp.json();
    const jsonFiles = files.filter(f => f.path.endsWith('.json'));
    if (!jsonFiles.length) {
      listEl.innerHTML = `<div class="empty"><div class="empty-icon">~/</div><div class="empty-text">Waiting for first report...</div></div>`;
      errorEl.innerHTML = ''; return;
    }

    const servers = [];
    for (const f of jsonFiles) {
      const url = `https://huggingface.co/datasets/${REPO}/resolve/main/${f.path}?t=${Date.now()}`;
      const resp = await fetch(url, { headers });
      if (resp.ok) servers.push(await resp.json());
    }

    servers.sort((a, b) => {
      const aO = isOffline(a.timestamp), bO = isOffline(b.timestamp);
      if (aO !== bO) return aO ? 1 : -1;
      return (a.hostname || '').localeCompare(b.hostname || '');
    });

    serverData = servers;
    listEl.innerHTML = `<div class="grid">${servers.map((s, i) => renderGridCard(s, i)).join('')}</div>`;
    errorEl.innerHTML = '';
    document.getElementById('status-line').textContent = `LIVE · ${servers.length} server${servers.length > 1 ? 's' : ''}`;

  } catch (err) {
    errorEl.innerHTML = `<div class="error-banner">Error: ${escHtml(err.message)}</div>`;
  }
  startCountdown();
}

// Back gesture
document.getElementById('detail-overlay').addEventListener('touchstart', function(e) {
  this._touchX = e.touches[0].clientX;
}, { passive: true });
document.getElementById('detail-overlay').addEventListener('touchend', function(e) {
  if (this._touchX < 40 && e.changedTouches[0].clientX > 80) hideDetail();
}, { passive: true });

fetchData();
</script>
</body>
</html>