- New js/ui/SignalCompass.js renders a faint ring around the ship with soft radio-signal markers at each undiscovered in-region object's bearing, with full→linear-fade envelope and per-id pulse phase
- Signals track live ship position each frame, drop on discovery, and re-emit on rescan; scene drives state, renderer is stateless
- data/signalCompass.json configures radius, lifetime (20s full + 5s fade), colors, signal/ripple/pulse/ring geometry with enabled gate
- dev/signal-compass.test.mjs unit-tests the pure signalAlpha envelope, bearingAngle math, and config sanity via Node
- dev/signal-compass-flow.{html,mjs} headless browser flow test boots real GameScene, presses SCAN, and verifies emission, fade, expiry, and discovery-drop behavior
