Electron App
                      │
       ┌──────────────┼──────────────┐
       │              │              │
  powerMonitor   systeminformation   active-window
       │              │              │
       │         CPU / RAM / Net     Active App
       │              │              │
       └──────────────┼──────────────┘
                      ▼
                Event Collector
                      │
                      ▼
                Local Database
                      │
                      ▼
              Activity Timeline