arena: minimap top-right + plain-English HUD
- 64×64 minimap above the HUD column showing arena bounds, every remote
player as a colored dot (handleColor), and self as a white dot with a
yellow yaw notch. Doubles as a visual confirmation that snaps are
actually flowing — if dots don't move, the netcode isn't.
- Replace the FPS/MS/FOV/RUN/POSE/POV/SPD/PERF/GFX/FLIP/NET/RX/TX/PEERS
jargon stack with a shorter, plainer column: players, online (live /
lagging / stalled / offline), lag, stance, view, speed, watching, fps,
quality. Same data, less code-speak.