- Ship gains a `thrust` state and `thrustToward()` that commits to the heading toward the click point and holds full throttle past it, until a plain click or stop steers out.
- GameScene pointer handler branches on `pointer.event.shiftKey`: Shift+click locks the heading (raw aim), plain click still flies to the clamped stop point.
- Mining teardown no longer stomps the ship state when the player has already moved it into `thrust`/`normal`.
- Update hint text and add unit tests (tests 7–10) plus a live-scene smoke harness (`?thrusttest=1`) verifying past-click flight, steer-back arrival, stop braking, and mining-exit signaling.
Brian Fertig
75c9f99ecb