- New SurfaceScene overlays GameScene when the player requests landing:
plays a one-shot landing clip, then a looping surface clip behind a
dedicated command deck (Shop/Build/Ship + Take Off + Menu).
- Wire comms panel "Request Landing" / "Land" buttons to launch the
surface; TAKE OFF stops SurfaceScene and wakes GameScene so the run
resumes exactly where it left off.
- ActionBar accepts an optional `buttons` override so scenes can supply a
different slot list while sharing layout/colors/animation.
- SavePanel gains a `stateScene` option so saves from the surface read
state from the paused GameScene underneath.
- Add data/landing.json (per-frame video map) and four placeholder
surface clips; CommsPanel now passes its full target payload through to
onAction so landing metadata survives the round-trip.
- Add dev harnesses: headless-Firefox screenshot helper, click-path test
for the real user flow, and a surface-flow assertion suite with parked
screenshot pages.
