diff --git a/src/web/index.html b/src/web/index.html
index 4f02697..8268cb5 100644
--- a/src/web/index.html
+++ b/src/web/index.html
@@ -97,109 +97,153 @@
   <div style="margin-top:6px;font-size:11px;color:#6b7280">⚠ 购入区间与预计收益为模型回测/推测口径，不构成投资建议。</div>
 </section>
 <script>
-const feed = document.getElementById('feed')
-const conn = document.getElementById('conn')
-const buf = document.getElementById('buf')
-let filter = ''
-let ws, retryTimer
+'use strict';
+var feed = document.getElementById('feed')
+var connEl = document.getElementById('conn')
+var bufEl = document.getElementById('buf')
+var filter = ''
+var ws = null
+var retryTimer = null
 
-function esc(s) { return String(s ?? '').replace(/[<>&]/g, '') }
+function esc(s) { return String(s == null ? '' : s).replace(/[<>&]/g, '') }
 
 function impactCard(d) {
   if (!d || !d.stocks || !d.stocks.length) return ''
-  const dirCls = { '利好': 'dir-bull', '利空': 'dir-bear' }[d.direction] || 'dir-neutral'
-  const rows = d.stocks.map(s =>
-    `<tr><td>${esc(s.name)}</td><td>${esc(s.code)}</td>` +
-    `<td>${s.buy_zone[0]} ~ ${s.buy_zone[1]}</td>` +
-    `<td class="${s.expected_return_pct > 0 ? 'up' : s.expected_return_pct < 0 ? 'down' : ''}">${s.expected_return_pct > 0 ? '+' : ''}${s.expected_return_pct}%</td>` +
-    `<td class="stars">${'★'.repeat(s.stars)}${'☆'.repeat(5 - s.stars)}</td>` +
-    `<td>${esc(s.reason)}</td></tr>`).join('')
-  return `<div class="impact"><table>` +
-    `<tr><th>标的</th><th>代码</th><th>建议购入区间</th><th>预计收益(5日,推测)</th><th>推荐指数</th><th>简易原因</th></tr>${rows}</table>` +
-    `<div class="disclaimer">⚠ 模型推断仅供参考，预计收益为推测值，不构成投资建议；置信度 ${d.confidence ?? '-'}%</div></div>`
+  var rows = d.stocks.map(function (s) {
+    var er = Number(s.expected_return_pct) || 0
+    var erCls = er > 0 ? 'up' : er < 0 ? 'down' : ''
+    var erSign = er > 0 ? '+' : ''
+    return '<tr><td>' + esc(s.name) + '</td><td>' + esc(s.code) + '</td>' +
+      '<td>' + s.buy_zone[0] + ' ~ ' + s.buy_zone[1] + '</td>' +
+      '<td class="' + erCls + '">' + erSign + er + '%</td>' +
+      '<td class="stars">' + '★'.repeat(s.stars) + '☆'.repeat(5 - s.stars) + '</td>' +
+      '<td>' + esc(s.reason) + '</td></tr>'
+  }).join('')
+  return '<div class="impact"><table>' +
+    '<tr><th>标的</th><th>代码</th><th>建议购入区间</th><th>预计收益(5日,推测)</th><th>推荐指数</th><th>简易原因</th></tr>' +
+    rows + '</table>' +
+    '<div class="disclaimer">⚠ 模型推断仅供参考，预计收益为推测值，不构成投资建议；置信度 ' +
+    (d.confidence == null ? '-' : d.confidence) + '%</div></div>'
 }
 
 function render(e, fresh) {
   if (filter && e.kind !== filter) return
-  const empty = feed.querySelector('.empty')
-  if (empty) empty.remove()
-  const li = document.createElement('li')
+  var emptyLi = feed.querySelector('.empty')
+  if (emptyLi) emptyLi.remove()
+  var li = document.createElement('li')
   li.className = 'evt' + (fresh ? ' fresh' : '')
-  const d = e.data || {}
+  var d = e.data || {}
   if (e.kind === '事件影响分析') {
-    const dirCls = { '利好': 'dir-bull', '利空': 'dir-bear', '中性': 'dir-neutral' }[d.direction] || ''
-    const sectors = (d.sectors || []).map(s => `<span class="stars">${esc(s)}</span>`).join(' / ')
-    li.innerHTML = `<span class="t">${e.ts}</span>` +
-      `<span class="k ${e.kind}">事件影响</span>` +
-      `<span class="d"><b>${esc(d.event_summary)}</b><br>` +
-      `方向：<span class="${dirCls}">${esc(d.direction)}</span> ｜ 板块：${sectors || '—'} ｜ 置信度 ${d.confidence ?? '-'}%<br>` +
-      `${esc(d.reasoning || '')}${impactCard(d)}</span>`
+    var dirCls = d.direction === '利好' ? 'dir-bull' : d.direction === '利空' ? 'dir-bear' : 'dir-neutral'
+    var sectors = (d.sectors || []).map(esc).join(' / ')
+    li.innerHTML = '<span class="t">' + esc(e.ts) + '</span>' +
+      '<span class="k">事件影响</span>' +
+      '<span class="d"><b>' + esc(d.event_summary) + '</b><br>' +
+      '方向：<span class="' + dirCls + '">' + esc(d.direction) + '</span> ｜ 板块：' + sectors +
+      ' ｜ 置信度 ' + (d.confidence == null ? '-' : d.confidence) + '%<br>' +
+      esc(d.reasoning || '') + impactCard(d) + '</span>'
   } else if (e.kind === '量化推荐') {
     renderQuant(e.data)
-    const txt = '自适应模型推送 ' + ((d.list || []).length) + ' 只推荐'
-    li.innerHTML = `<span class="t">${e.ts}</span><span class="k ${e.kind}">${e.kind}</span><span class="d">${esc(txt)}</span>`
+    var n = (d.list || []).length
+    li.innerHTML = '<span class="t">' + esc(e.ts) + '</span><span class="k">量化推荐</span>' +
+      '<span class="d">自适应模型推送 ' + n + ' 只推荐</span>'
   } else {
-    const txt = typeof d === 'object' ? JSON.stringify(d) : String(d)
-    li.innerHTML = `<span class="t">${e.ts}</span><span class="k ${e.kind}">${e.kind}</span><span class="d">${esc(txt)}</span>`
+    var txt = typeof d === 'object' ? JSON.stringify(d) : String(d)
+    li.innerHTML = '<span class="t">' + esc(e.ts) + '</span><span class="k">' + esc(e.kind) +
+      '</span><span class="d">' + esc(txt) + '</span>'
   }
-  feed.prepend(li)
-  while (feed.children.length > 300) feed.lastChild.remove()
+  feed.insertBefore(li, feed.firstChild)
+  while (feed.children.length > 300) feed.removeChild(feed.lastChild)
 }
 
-function applyRecent(events) {
-  [...events].reverse().forEach(e => render(e, false))
+function renderQuant(d) {
+  var tb = document.querySelector('#qtable tbody')
+  if (!tb || !d || !d.list) return
+  tb.innerHTML = d.list.map(function (r) {
+    return '<tr><td>' + esc(r.code) + '</td><td>' + esc(r.name) + '</td>' +
+      '<td>' + r.price + '</td><td>' + r.score + '</td>' +
+      '<td>' + r.buy_low + ' ~ ' + r.buy_high + '</td>' +
+      '<td>' + (r.expected_return_pct == null ? '—' : r.expected_return_pct + '%') + '</td>' +
+      '<td class="stars">' + '★'.repeat(r.stars) + '☆'.repeat(5 - r.stars) + '</td>' +
+      '<td>' + esc(r.reason) + '</td></tr>'
+  }).join('')
 }
 
-function function renderQuant(d) {
-  const tb = document.querySelector('#qtable tbody')
-  if (!tb) return
-  tb.innerHTML = (d.list || []).map(r =>
-    '<tr><td style="padding:6px 10px">' + esc(r.code) + '</td>' +
-    '<td style="padding:6px 10px">' + esc(r.name) + '</td>' +
-    '<td style="padding:6px 10px">' + r.price + '</td>' +
-    '<td style="padding:6px 10px">' + r.score + '</td>' +
-    '<td style="padding:6px 10px">' + r.buy_low + ' ~ ' + r.buy_high + '</td>' +
-    '<td style="padding:6px 10px">' + (r.expected_return_pct == null ? '—' : r.expected_return_pct + '%') + '</td>' +
-    '<td style="padding:6px 10px" class="stars">' + '★'.repeat(r.stars) + '</td>' +
-    '<td style="padding:6px 10px">' + esc(r.reason) + '</td></tr>').join('')
-}
 function loadQuant() {
-  fetch('/api/quant/recommendations').then(r => r.json()).then(renderQuant).catch(() => {})
-  fetch('/api/quant/weights').then(r => r.json()).then(w => {
-    document.getElementById('qw').textContent =
-      Object.entries(w || {}).map(([k, v]) => k + '=' + Number(v).toFixed(2)).join('  ') || '—'
-  }).catch(() => {})
+  fetch('/api/quant/recommendations').then(function (r) { return r.json() })
+    .then(renderQuant).catch(function () {})
+  fetch('/api/quant/weights').then(function (r) { return r.json() }).then(function (w) {
+    var el = document.getElementById('qw')
+    if (el) el.textContent = Object.keys(w || {}).map(function (k) {
+      return k + '=' + Number(w[k]).toFixed(2)
+    }).join('  ') || '—'
+  }).catch(function () {})
 }
-loadQuant()
-setInterval(loadQuant, 60000)
-connect() {
-  const proto = location.protocol === 'https:' ? 'wss' : 'ws'
-  ws = new WebSocket(`${proto}://${location.host}/ws`)
-  ws.onopen = () => { conn.textContent = '已连接'; conn.className = 'conn on' }
-  ws.onclose = () => {
-    conn.textContent = '已断开，重连中…'; conn.className = 'conn off'
+
+function setConn(connected) {
+  connEl.textContent = connected ? '已连接' : '已断开，重连中…'
+  connEl.className = 'conn ' + (connected ? 'on' : 'off')
+}
+
+function connect() {
+  if (ws && (ws.readyState === 0 || ws.readyState === 1)) return
+  var proto = location.protocol === 'https:' ? 'wss' : 'ws'
+  ws = new WebSocket(proto + '://' + location.host + '/ws')
+  ws.onopen = function () {
+    setConn(true)
+    fetch('/api/recent').then(function (r) { return r.json() })
+      .then(function (d) {
+        (d.events || []).slice().reverse().forEach(function (e) { render(e, false) })
+      }).catch(function () {})
+  }
+  ws.onclose = function () {
+    setConn(false)
+    if (retryTimer) clearTimeout(retryTimer)
     retryTimer = setTimeout(connect, 3000)
   }
-  ws.onmessage = m => {
-    try { render(JSON.parse(m.data), true) } catch (e) {}
+  ws.onmessage = function (m) {
+    try { render(JSON.parse(m.data), true) } catch (e) { /* 忽略单条解析失败 */ }
   }
 }
 
-document.getElementById('filters').addEventListener('click', ev => {
-  if (ev.target.dataset.f === undefined) return
-  filter = ev.target.dataset.f
-  document.querySelectorAll('.filters button').forEach(b => b.classList.toggle('active', b === ev.target))
-  fetch(`/api/recent`).then(r => r.json()).then(d => {
-    feed.innerHTML = ''
-    ;[...(d.events || [])].reverse().forEach(e => render(e, false))
-  })
+document.getElementById('filters').addEventListener('click', function (ev) {
+  var f = ev.target.dataset ? ev.target.dataset.f : undefined
+  if (f === undefined) return
+  filter = f
+  var btns = document.querySelectorAll('#filters button')
+  for (var i = 0; i < btns.length; i++) {
+    btns[i].className = btns[i].dataset.f === filter ? 'active' : ''
+  }
+  var rows = feed.children
+  for (var j = rows.length - 1; j >= 0; j--) {
+    var show = !filter || rows[j].dataset.kind === filter
+    rows[j].style.display = show ? '' : 'none'
+  }
 })
 
-fetch('/api/stats').then(r => r.json()).then(s => buf.textContent = s.buffered)
-fetch('/api/recent').then(r => r.json()).then(d => {
-  ;[...(d.events || [])].reverse().forEach(e => render(e, false))
+function refreshData() {
+  fetch('/api/recent').then(function (r) { return r.json() })
+    .then(function (d) {
+      var evs = d.events || []
+      for (var i = evs.length - 1; i >= 0; i--) render(evs[i], false)
+    }).catch(function () {})
+  loadQuant()
+  fetch('/api/stats').then(function (r) { return r.json() })
+    .then(function (s) { bufEl.textContent = s.buffered }).catch(function () {})
+}
+
+document.addEventListener('visibilitychange', function () {
+  if (document.visibilityState === 'visible') {
+    connect()
+    refreshData()
+  }
 })
-setInterval(() => fetch('/api/stats').then(r => r.json()).then(s => buf.textContent = s.buffered), 10000)
+window.addEventListener('online', function () { location.reload() })
+
+refreshData()
+setInterval(refreshData, 10000)
+loadQuant()
+setInterval(loadQuant, 60000)
 connect()
 </script>
 </body>