Add the last two design-§5 tray tools:
- <parking-lot>: one-tap capture of a thread to return to, stamped with
the session time, persisted per-scenario (parkingLot store key), 📝 chip.
- src/core/wake-lock.js: injectable Screen Wake Lock controller (keeps the
tablet awake, re-acquires on foreground, graceful no-op where the API is
absent). Toggled by a 💡 rail chip that lights when active.
Tests: parking-lot.test.js, wake-lock.test.js, gm-shell-parking.test.js,
gm-shell-wake.test.js. 179 tests pass; build clean.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
