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

native-host/holesail-manager/state.js

@@ -13,11 +13,14 @@ const LEGACY_PERSIST_FILENAME = 'holesail-persist.json';
 const SETTINGS_DEFAULTS = {
   proxyPort: 8443,
   connectProxyPort: 8442,
-  readyTimeoutMs: 0,
+  readyTimeoutMs: 30000,
   notifyOnDisconnect: true,
+  notifyOnTunnelError: true,
   debug: false,
   disableOnFileUrls: false,
-  backupRetention: 5
+  backupRetention: 5,
+  backupIntervalHours: 0,
+  tunnelAutoReconnect: false
 };
 
 const DEBUG = process.env.HOLESAIL_DEBUG === '1' || process.env.HOLESAIL_DEBUG === 'true';