feat: kickable ball (B / pad Y) and detachable chase camera (C)

feat: one-shot kick moves from the runtime's ball-kick policies

feat: live multiplayer ghosts over WebRTC (Trystero/Nostr)

feat: per-key hint highlighting, no default forward command, rename roulade to roll in UI and internals

feat: HUD UX pass - state label with slot-machine roll, keycap hints, per-device highlighting, quack sound from the runtime

feat: gamepad support mirroring the robot runtime mapping

feat: standalone Microduck RL playground (MuJoCo WASM + ONNX policies)

initial commit