- Introduce the `firstForeignPlanet` trigger: when the player discovers a planet in a non-home system, Trestle (new out-of-system mentor character) delivers a two-part ack comm pair (meetup + quest claim), with dedicated video and speech assets.
- Make audio cache keys folder-scoped so characters with identically-named clips (e.g. both having `intro-01.mp3`) don't collide in the loader.
- Add an amber pulsing attention cue (halo + staggered sonar rings) on the ACKNOWLEDGE button for ack comms, driven per-frame from CommsBox.update().
- Put the ActionBar deck into a standby state while an ack comm holds: slots go inert (no hover/press), dimmed visually; re-arms when the comm ends. GameScene wires this via `actionBar.setEnabled()` each frame based on `comms.paused`.
- Extend MenuButton to accept a custom border color so the ACK button can wear the box's amber against the cyan UI.
- Add dev self-check harnesses (`comms-trestle.mjs`, `comms-trestle-hold.mjs`) and update existing tests to cover the new pair, folder-scoped keys, deck standby behavior, and pulse animation.
- Disable browser module caching in CDP probe/shot scripts to avoid stale ES modules shadowing on-disk changes during dev testing.
