feat: relay station masts come online through the toolkit chapter

docs/overnight/LOG.md

@@ -55,3 +55,11 @@ Run: `npm run build:preview` then serve `dist` (dev server shows a blank page).
 - **Verdict: KEEP with fixes** (Fable, hardware GL): Contact bars were striped (aubergine outro bars under black), now frame draws its own bars; canvas resized on open due to overflow lock (removed); focus dropped after save; `c` worked on phones where the button is hidden; round 5's HUD exit tab had been dropped, restored; REC dot got a no-music blink.
 - **Known weaknesses:** postcard is the 1440x900 buffer scaled to 1600 (slightly soft) and keeps the lens bars; no phone version; shutter click only while soundtrack runs; two chapter-label vocabularies in the frame.
 - Screenshots: docs/overnight/round6/ (postcard.webp is the real downloaded file).
+
+## Round 7: Relay Station (Toolkit transmitter masts)
+- **What:** the Toolkit chapter is a pre-dawn relay station. Four lattice masts (one per toolkit group, rung count = technology count: 11/8/4/3) stand in the side margins; as scroll passes 0.04/0.22/0.40/0.58 each comes online: violet lamp rungs ignite bottom-up, a red beacon blinks at 0.5 Hz, a violet sky beam sweeps. The reading plates get an accent "· ONLINE" state in the same order. Hovering a technology flashes its rung. Reverse scroll takes it offline. A short synthesized chirp plays per mast when sound is on. Lite tier: static lit masts; reduced motion: CSS-only ONLINE plates.
+- **Why:** Toolkit was the last chapter with no world beat and the dullest content in any portfolio; lists become a lit skyline with honest counts, placed in the margins the panel does not cover.
+- **Build:** journey/relay-progress.ts, composables/useRelay.ts, scene/world/relay-masts.ts, audio/relay-tone.ts (lazy), styles/relay.css. 839 tests, initial JS 118.08 KB gz (**1.9 KB left**), scene chunk 214 KB.
+- **Verdict: KEEP with fixes** (Fable, hardware GL): near/far pairs overlapped and the near-right mast clipped, so layout is now aspect-aware with the far mast closer to centre; lamps were white and rungs grey, now hot violet above the bloom threshold; beams brightened and widened with a eased base; hover flash made visible.
+- **Known weaknesses:** lamp cores still tonemap to lavender-white (violet lives in the halo); masts are slivers on phones and modest at 1024 wide; hover flash is a peripheral beat; chirp verified by unit test only.
+- Screenshots: docs/overnight/round7/.