Summary

• Moves Apple SPU HID report delivery from the main run loop to a dedicated dispatch queue.
• Keeps a monitoring activity active while listening so macOS does not throttle the sensor loop in the background.
• Prevents the app from terminating when the last window is closed, so the red close button hides the window while the menu bar app keeps running.

Fixed

The slap detector was coupled too tightly to foreground window/app lifecycle. Closing or backgrounding the window could stop practical monitoring behavior. The sensor backend now lives independently from the window, and the menu bar app stays alive.

Validation

• swift build passed.