HUD auto-hide

Option: show the HUD automatically when Rocket League is running, hide it when the game closes.

Behavior

• On Stats API connection (RL open + Stats API active) → the HUD shows itself.
• On disconnect (RL closed or crashed) → the HUD hides.

The option is off by default — opt-in so existing users who drive the HUD manually with the "Show HUD" button aren't surprised.

Turn it on

In the Appearance section: tick "Auto-hide when RL is offline".

Rocket League detection

The app detects Rocket League's presence with two complementary signals:

1. WebSocket connection to ws://localhost:49123 (the Stats API). Present = RL is running and the Stats API is active.
2. Windows process list polling (RocketLeague.exe) — collapses the "RL crashed" detection delay to <1 s, vs. ~8 s without (the Stats API doesn't send a clean FIN on a Quit).

No injection. No hooks. Just passive reads.