feat: add Night Shift layer (boot intro, ops strip, headlight, chapter numerals, film grain)

src/components/AppShell.vue

@@ -2,10 +2,12 @@
 import { computed, onMounted, onUnmounted, shallowRef, watch } from 'vue';
 import ContactDestination from './ContactDestination.vue';
 import DriveControls from './DriveControls.vue';
+import BootSequence from './BootSequence.vue';
 import ExperienceTimeline from './ExperienceTimeline.vue';
 import HeroJourney from './HeroJourney.vue';
 import InfrastructureDiagram from './InfrastructureDiagram.vue';
 import JourneyHud from './JourneyHud.vue';
+import OperationsStrip from './OperationsStrip.vue';
 import PortfolioSection from './PortfolioSection.vue';
 import ProjectCard from './ProjectCard.vue';
 import ProjectCaseStudy from './ProjectCaseStudy.vue';
@@ -16,6 +18,7 @@ import { useAdaptiveQuality } from '@/composables/useAdaptiveQuality';
 import { useAudioEngine } from '@/composables/useAudioEngine';
 import { useAudioIntent } from '@/composables/useAudioIntent';
 import { useJourneySections } from '@/composables/useJourneySections';
+import { useHeadlight } from '@/composables/useHeadlight';
 import { useKeyboardNavigation } from '@/composables/useKeyboardNavigation';
 import { useMotionPreferences } from '@/composables/useMotionPreferences';
 import { assetUrl } from '@/content/asset-url';
@@ -59,6 +62,7 @@ const sectionLabel = (id: SectionId): string => {
 
 const canonicalNavigation = computed(() => canonicalSectionIds.map((id) => ({ id, label: sectionLabel(id) })));
 const motion = useMotionPreferences();
+useHeadlight(computed(() => motion.policy.value.allowSceneRequest));
 const navigation = useKeyboardNavigation(canonicalSectionIds);
 const journeyBinding = useJourneySections(
   canonicalSectionIds,
@@ -211,6 +215,8 @@ onUnmounted(() => removePageListeners());
     :sample-frame="sampleSceneFrame"
     @state-change="updateSceneState"
   />
+  <BootSequence :allow-motion="motion.policy.value.allowSceneRequest" />
+  <OperationsStrip />
   <JourneyHud
     :journey="journey"
     :section-label="activeSectionLabel"