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/service-tunnels.js

@@ -1,6 +1,19 @@
 // Depends on: core/utils.js ($, escapeHtml, truncate), ui/state-tag.js (stateTag),
 //             ui/toast.js (showToast, copyToClipboard), ui/modal.js (openModal, closeModal, showModalError)
 
+function _updateSvcBulkBar() {
+  const checked = document.querySelectorAll('#serviceTunnelsTable input[type="checkbox"]:checked');
+  const bar = $('svcBulkBar');
+  const countEl = $('svcBulkCount');
+  if (!bar) return;
+  if (checked.length > 0) {
+    bar.style.display = 'flex';
+    if (countEl) countEl.textContent = checked.length + ' selected';
+  } else {
+    bar.style.display = 'none';
+  }
+}
+
 function updateServiceTunnelsTable(state) {
   const tbody = $('serviceTunnelsTable');
   if (!tbody) return;
@@ -11,13 +24,14 @@ function updateServiceTunnelsTable(state) {
 
   if (tunnels.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"><path d="M12 2L2 7l10 5 10-5-10-5z"/><path d="M2 17l10 5 10-5"/><path d="M2 12l10 5 10-5"/></svg>
           <div class="empty-state-title">No service tunnels</div>
           <div class="empty-state-desc">Click "Add Tunnel" to connect a remote TCP/UDP service via Holesail</div>
         </div>
       </td></tr>`;
+    _updateSvcBulkBar();
     return;
   }
 
@@ -29,6 +43,7 @@ function updateServiceTunnelsTable(state) {
     const safeId = id.replace(/"/g, '&quot;');
     return `
       <tr>
+        <td style="width:32px;"><input type="checkbox" class="svc-row-cb" data-tunnel-id="${safeId}"></td>
         <td style="font-weight:600;color:var(--text);">${escapeHtml(label)}</td>
         <td>
           <div style="display:flex;align-items:center;gap:6px;">
@@ -48,7 +63,10 @@ function updateServiceTunnelsTable(state) {
             </button>` : ''}
           </div>
         </td>
-        <td>${stateTag(t.state)}</td>
+        <td>
+          ${stateTag(t.state)}
+          ${t.localPort != null ? `<span class="latency-badge" data-ping-host="127.0.0.1" data-ping-port="${t.localPort}" style="margin-left:4px;font-size:10px;color:var(--text4);">…ms</span>` : ''}
+        </td>
         <td>
           <div style="display:flex;align-items:center;gap:6px;">
             ${(t.state === 'error' || t.state === 'closed') ? `
@@ -69,6 +87,10 @@ function updateServiceTunnelsTable(state) {
       </tr>`;
   }).join('');
 
+  tbody.querySelectorAll('.svc-row-cb').forEach(cb => {
+    cb.addEventListener('change', _updateSvcBulkBar);
+  });
+
   tbody.querySelectorAll('[data-copy]').forEach(btn => {
     btn.addEventListener('click', () => copyToClipboard(btn.dataset.copy, btn));
   });
@@ -123,9 +145,30 @@ function updateServiceTunnelsTable(state) {
       openModal('modal-removeServiceTunnel');
     });
   });
+
+  _updateSvcBulkBar();
 }
 
 function setupServiceTunnelEvents() {
+  $('svcSelectAll')?.addEventListener('change', (e) => {
+    document.querySelectorAll('#serviceTunnelsTable .svc-row-cb').forEach(cb => { cb.checked = e.target.checked; });
+    _updateSvcBulkBar();
+  });
+
+  $('btnSvcBulkRemove')?.addEventListener('click', () => {
+    const checked = Array.from(document.querySelectorAll('#serviceTunnelsTable .svc-row-cb:checked'));
+    if (!checked.length) return;
+    const ids = checked.map(cb => cb.dataset.tunnelId);
+    if (!confirm('Remove ' + ids.length + ' service tunnel(s)?')) return;
+    let done = 0;
+    for (const tunnelId of ids) {
+      chrome.runtime.sendMessage(
+        { target: 'holesail-native', action: 'send', payload: { type: 'stopServiceTunnel', payload: { tunnelId } } },
+        () => { done++; if (done === ids.length) { showToast(ids.length + ' tunnel(s) removed', 'success'); refresh(); } }
+      );
+    }
+  });
+
   $('addServiceTunnelBtn')?.addEventListener('click', () => {
     $('serviceTunnelEditId').value = '';
     $('serviceTunnelLabel').value = '';