Electron App: System integration (tray, notifications, deep links)

[jongio]

Overview

System tray icon, native notifications, auto-launch, and deep link protocol handler.

Acceptance Criteria

• System tray icon with context menu (Show, Hide, Quit)
• Tray badge/indicator when sessions are waiting for attention
• Minimize to tray (close button minimizes, tray click restores)
• Native notifications when session attention changes (configurable)
• Notification click opens dispatch and navigates to session
• Auto-launch on system startup (optional, configurable in settings)
• Deep link protocol: \dispatch://session/{id}\ opens and selects session
• Protocol handler registration on install
• Dock badge (macOS) showing waiting session count
• Windows: taskbar progress/badge integration

Platform-Specific Behaviors

• Windows: System tray in notification area, balloon notifications
• macOS: Menu bar icon (optional), Notification Center, dock badge
• Linux: AppIndicator/StatusNotifier, libnotify, .desktop file