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

src/scene/world/environment.ts

@@ -36,6 +36,8 @@ import {
 import { createMaintenanceWindow } from '@/scene/world/maintenance-window';
 import { createHeadlights } from '@/scene/world/headlights';
 import { maintenanceProgress } from '@/journey/maintenance-progress';
+import { createMilestones } from '@/scene/world/milestones';
+import { isMilestoneSection, sectionLocalProgress } from '@/journey/route-log';
 import { dawnStep, type DawnStep } from '@/journey/dawn';
 import { dawnLightUniforms } from '@/scene/world/dawn-light';
 import { isTestFault, recordTestFaultEvent } from '@/testing/fault-hooks';
@@ -169,8 +171,13 @@ export async function createProceduralSceneGeneration(
   // the star drain (uniform writes); the warm rims and the bloom change are
   // high/medium fine-pointer only.
   const dawnRims = maintenanceTier === 'full';
+  // MILE MARKERS: kilometre posts roll past through Experience and Profile.
+  // Low tier and touch draw them without beam, pulse or flash.
+  const milestones = createMilestones(context.resources, maintenanceTier === 'full');
   scene.add(
     maintenance.group,
+    milestones.mesh,
+    milestones.pool,
     atmosphere.group,
     road.group,
     expressway.group,
@@ -351,6 +358,14 @@ export async function createProceduralSceneGeneration(
         targetPalette.starVisibility *= 1 - (1 - STORM_STAR_SCALE) * service.storm;
       }
       districts.setServiceState(service.dim, service.relight);
+      milestones.update(
+        snapshot.activeSectionId,
+        isMilestoneSection(snapshot.activeSectionId)
+          ? sectionLocalProgress(snapshot, snapshot.activeSectionId)
+          : null,
+        musicPulse,
+        deltaSeconds,
+      );
       // END OF SHIFT: parked at the destination, the night ends. One scalar
       // drives it all; leaving rewinds it as fast as the outro returns.
       const dawn = easeInOutCubic(outroProgress);