feat: implement 13 features — auto-reconnect, notifications, bulk actions, latency, traffic, theme, export/import, scheduled backups, peer lookup, SSH auto-reconnect, log filters, keyboard shortcut, and readyTimeout default

- Change readyTimeoutMs default from 0 to 30000 in both state files
- Register Alt+Shift+H keyboard shortcut via manifest _execute_action command
- Add severity filter buttons (All/Info/Warn/Error) and Download .txt to Logs page; background logs.js now tags entries with proper level field
- Fire browser notifications on tunnelError events (notifyOnTunnelError setting)
- Add exponential-backoff auto-reconnect for virtual hosts and service tunnels (tunnelAutoReconnect setting, 5s–120s backoff)
- Add backupIntervalHours setting and scheduled auto-backup timer in message-router.js
- Add TCP connect latency badges to Virtual Hosts and Service Tunnels tables via new pingTunnel native message
- Add bytesIn/bytesOut/requests counters to https-proxy.js; expose in Overview status bar via getState
- Add Export/Import connection configs (JSON, no CA key) in Settings
- Add autoReconnect flag and exponential-backoff reconnect to SSH connection cards
- Add light theme CSS variables and theme toggle in Settings (persisted to localStorage)
- Add checkbox column and bulk Stop/Remove actions to Virtual Hosts, Service Tunnels, and Servers tables
- Add Peer Lookup UI card on Overview page using existing lookup message handler

extension/dashboard/pages/servers.js

@@ -1,6 +1,19 @@
 // Depends on: core/utils.js ($, escapeHtml, truncate), ui/toast.js (showToast, copyToClipboard),
 //             ui/modal.js (openModal, closeModal, showModalError)
 
+function _updateServerBulkBar() {
+  const checked = document.querySelectorAll('#swarmsTable input[type="checkbox"]:checked');
+  const bar = $('serverBulkBar');
+  const countEl = $('serverBulkCount');
+  if (!bar) return;
+  if (checked.length > 0) {
+    bar.style.display = 'flex';
+    if (countEl) countEl.textContent = checked.length + ' selected';
+  } else {
+    bar.style.display = 'none';
+  }
+}
+
 function updateSwarmsTable(state) {
   const tbody = $('swarmsTable');
   if (!tbody) return;
@@ -8,13 +21,14 @@ function updateSwarmsTable(state) {
 
   if (servers.length === 0) {
     tbody.innerHTML = `
-      <tr><td colspan="5">
+      <tr><td colspan="6">
         <div class="empty-state">
           <svg viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="1.5"><rect x="2" y="3" width="6" height="6" rx="1"/><rect x="16" y="3" width="6" height="6" rx="1"/><rect x="9" y="15" width="6" height="6" rx="1"/><line x1="5" y1="9" x2="12" y2="15"/><line x1="19" y1="9" x2="12" y2="15"/></svg>
           <div class="empty-state-title">No server tunnels</div>
           <div class="empty-state-desc">Click "New Server" to expose a local port as an hs:// tunnel</div>
         </div>
       </td></tr>`;
+    _updateServerBulkBar();
     return;
   }
 
@@ -25,6 +39,7 @@ function updateSwarmsTable(state) {
     const label = s.label || '';
     return `
       <tr>
+        <td style="width:32px;"><input type="checkbox" class="server-row-cb" data-server-id="${safeId}"></td>
         <td>
           ${label ? `<div style="font-weight:600;color:var(--text);margin-bottom:2px;">${escapeHtml(label)}</div>` : ''}
           <div class="mono" style="font-size:11px;color:var(--text3);">${escapeHtml(truncate(id, 20))}</div>
@@ -57,6 +72,10 @@ function updateSwarmsTable(state) {
       </tr>`;
   }).join('');
 
+  tbody.querySelectorAll('.server-row-cb').forEach(cb => {
+    cb.addEventListener('change', _updateServerBulkBar);
+  });
+
   tbody.querySelectorAll('[data-copy]').forEach(btn => {
     btn.addEventListener('click', () => copyToClipboard(btn.dataset.copy, btn));
   });
@@ -94,9 +113,30 @@ function updateSwarmsTable(state) {
       openModal('modal-stopServer');
     });
   });
+
+  _updateServerBulkBar();
 }
 
 function setupServerEvents() {
+  $('serverSelectAll')?.addEventListener('change', (e) => {
+    document.querySelectorAll('#swarmsTable .server-row-cb').forEach(cb => { cb.checked = e.target.checked; });
+    _updateServerBulkBar();
+  });
+
+  $('btnServerBulkStop')?.addEventListener('click', () => {
+    const checked = Array.from(document.querySelectorAll('#swarmsTable .server-row-cb:checked'));
+    if (!checked.length) return;
+    const ids = checked.map(cb => cb.dataset.serverId);
+    if (!confirm('Stop ' + ids.length + ' server(s)?')) return;
+    let done = 0;
+    for (const serverId of ids) {
+      chrome.runtime.sendMessage(
+        { target: 'holesail-native', action: 'send', payload: { type: 'stopServer', payload: { serverId } } },
+        () => { done++; if (done === ids.length) { showToast(ids.length + ' server(s) stopped', 'success'); refresh(); } }
+      );
+    }
+  });
+
   $('startServerBtn')?.addEventListener('click', () => {
     const editIdEl = $('serverEditId');
     if (editIdEl) editIdEl.value = '';