- New `js/visuals/EngineFlare.js` drives nozzle glow, ignition burst, and a short fading exhaust plume from the two side-pod engines, driven by the ship's live throttle so braking dims it and Shift+click lights it up full
- Configurable via new `thrustFx` block in `data/ship.json` (enabled flag, core/plume colors)
- Hooked into GameScene lifecycle: created per scene restart, updated from the scene clock, cleaned up on landing sleep and scene destroy so nothing survives frozen mid-glow
- Add dev harnesses for visual verification: `dev/engine-flare-test.mjs` (headless Chromium CDP walk through idle → ignite → burn → coast → settled with screenshots) and `dev/particle-probe.{html,mjs}` to confirm particle velocity follows the emitter's heading
- Add new arid planet art asset
