- Introduce `Ship.state` ('normal' | 'mining') with `setState()` and an
`onStateChange` callback so the scene can react to state exits.
- Any player-initiated movement (world click or compass autopilot) now
drops the ship back to 'normal', which ends the mining sequence via the
scene's handler; Mining.update() enforces the gate as a belt-and-braces.
- Rename `Mining.isLocked` to `isActive` and update GameScene click logic:
clicks no longer hold during extension — they move the ship and abort the
arm's reach.
- Tighten the popup-button swallow window from 300 ms to 20 ms and add a
`containsScreen()` hit-test so only the exact button press is consumed,
not subsequent deliberate clicks on the panel area.
- Expand the headless mining test to cover the new movement-abort contract:
world click mid-extension breaks the arm, autopilot retracts the beam,
and ship state transitions are asserted at every stage.
Brian Fertig
75767dc5a5