feat: route log odometer and lit mile markers for profile and experience

docs/overnight/LOG.md

@@ -31,3 +31,11 @@ Run: `npm run build:preview` then serve `dist` (dev server shows a blank page).
 - **Known weaknesses:** the "SHIFT OVER" label swap is invisible (HUD arrival label collapsed); the bottom credit is mostly hidden by the Contact panel (pre-existing); horizon still bright at full day; reduced-motion version reads as dusk rather than sunrise; audio checked by code review only.
 - Screenshots: docs/overnight/round3/.
 
+## Round 4: Mile Markers (Profile + Experience)
+- **What:** the gantry HUD subline becomes a scroll-driven ROUTE LOG odometer ("LOG 02/04 · JUN 2025 → AUG 2025 · CCF", digit roll, " · REWIND" on reverse), and lit kilometre posts with accent plates and warm light pools come down the free shoulder, one per role/fact, flashing as their plate crosses the activation line.
+- **Why:** Profile and Experience were the only chapters with no world beat and left half the viewport empty. Career dates are real content, parsed from the JSON, nothing invented.
+- **Build:** src/journey/route-log.ts, useRouteLog.ts, scene/world/milestones.ts, styles/route-log.css; generalised maintenance-progress helpers. 766 tests green, initial JS +1.25 KB gz (115.9 of 120 - **budget nearly spent, keep DOM-side additions tiny**).
+- **Verdict: KEEP with fixes** (Fable): the delivered 0.18 x 2.6 m posts were 25 px specks at 80 m, so they were scaled to the ~2.3x world (0.4 x 6.4 m, 2.2 x 1.0 m plate), the pass point moved to z -12 to coincide with the tick, additive light pools added, and the phone subline overflow fixed.
+- **Known weaknesses:** the free side is narrow because of the camera frame shift, so the big pass is brief; plates read mostly white under tonemapping; no lit number glyphs on the plates.
+- Screenshots: docs/overnight/round4/.
+